CN115551109A - Wireless communication method, device and wireless distributed system - Google Patents

Abstract

The present application discloses a wireless communication method, which is applied in the field of wireless communication. The method includes: a target AP receives first flow information from a first AP. The first flow information includes first queue size information of the first data to be sent of the first AP. The target AP obtains target traffic information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP obtains the first time period and the target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The first AP sends the first data to be sent within the first time period. The target AP sends the target data to be sent within the target time period. In this application, by allocating different time periods for the target AP and the first AP, the probability of conflict between the first AP and the target AP can be reduced, thereby improving communication efficiency.

Description

Wireless communication method, device and wireless distributed system

technical field

The present application relates to the field of wireless communication, and in particular to a wireless communication method, device, and wireless distribution system (wireless distribution system, WDS).

Background technique

In the field of wireless communication, multiple APs can form a WDS through frame interaction. In WDS, APs access the medium through distributed competition, and the APs that compete for a transmission opportunity (transmission opportunity, TXOP) can send data. The manner of distributed competition includes distributed coordination function (distributed coordination function, DCF) or enhanced distributed access (enhanced distributed channel access, EDCA) mechanism. In the carrier sense multiple access with collision avoid (CSMA/CA) access rule used by EDCA or DCF, the AP will first wait for the distributed inter-frame spacing (DIFS) Interframe slots of duration. During this period, the AP will monitor the channel through a Clear Channel Assessment (CCA) mechanism. When the channel is busy, the AP thinks that other devices are occupying the channel, and the sending process is suspended. If the channel is currently idle, enter the binary backoff phase. The AP will first randomly select a value from the contention window (ContentionWindow), and then start the back off process. Every time a time slot (slot time) passes, the AP will decrement this value by 1 and monitor the channel. If the channel becomes busy, the AP aborts the fallback and saves this value. When the channel is idle, the AP continues to fall back. If the channel is still idle, keep backing off until this value rolls back to 0. At this time, the AP considers that the channel has been contended for and starts to send data.

However, in the CSMA/CA access mechanism, the values of multiple APs may fall back to 0 at the same time. At this time, multiple APs will send data at the same time. Therefore, multiple APs interfere with each other, resulting in data transmission failure, making the communication efficiency of the WDS low.

Contents of the invention

The present application provides a wireless communication method, device and WDS. By allocating different time periods for the target AP and the first AP, the probability of conflict between the first AP and the target AP can be reduced, thereby improving communication efficiency.

The first aspect of the present application provides a wireless communication method. The wireless communication method includes: a target AP receives first flow information from a first AP. The first flow information includes first queue size information of the first data to be sent of the first AP. The target AP obtains target traffic information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP obtains the first time period and the target time period according to the first queue size information and the target queue size information. There is no overlapping time period between the first time period and the target time period, that is, the first time period is different from the target time period. The target AP sends information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent within the first time period. The target AP sends the target data to be sent within the target time period.

In this application, by allocating different time periods for the target AP and the first AP, the time for sending data between the target AP and the first AP can be staggered. Therefore, the present application can reduce the probability of conflict between the first AP and the target AP, thereby improving communication efficiency.

In an optional manner of the first aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. During the target time period, the AP interface of the target AP sends downlink data among the target data to be sent to the M target STAs and the first AP through orthogonal frequency division multiple access (OFDMA). Wherein, sending data through OFDMA can improve utilization rate of a resource unit (resource unit, RU), thereby improving communication efficiency.

In an optional manner of the first aspect, the STA interface of the target AP is associated with the AP interface of the first AP. During the target time period, the target AP sends the uplink data in the target data to be sent to the first AP through the STA interface of the target AP. Wherein, the target AP may choose to send the target data to be sent to the first AP through the STA interface or the AP interface. Therefore, the present application can improve the flexibility of wireless communication.

In an optional manner of the first aspect, the STA interface of the target AP is associated with the AP interface of the first AP. The wireless communication method further includes: the target AP receives downlink data in the first data to be sent from the first AP through the STA interface of the target AP within the first time period. Wherein, within the first time period, the AP interface of the first AP may send the downlink data in the first data to be sent to the target AP and the first STA through OFDMA. The first STA is an STA associated with the first AP. At this time, the target AP may receive the downlink data in the first data to be sent from the first AP through the STA interface of the target AP within the first time period. Therefore, sending data through OFDMA can increase the utilization rate of RUs, thereby improving communication efficiency.

In an optional manner of the first aspect, the AP interface of the target AP is associated with the STA interface of the first AP. The wireless communication method further includes: the target AP receives the uplink data in the first data to be sent from the first AP through the AP interface of the target AP within the first time period. Wherein, the first AP may choose to send the first data to be sent to the target AP through the STA interface or the AP interface. Therefore, the present application can improve the flexibility of wireless communication.

In an optional manner of the first aspect, the wireless communication method further includes: the target AP obtains a free competition time period according to a free competition time period. There is no overlapping time period between the first time period, the target time period and the free competition time period, that is, the free competition time period is different from the first time period and the target time period. Wherein, the AP interface of the target AP is associated with M target STAs, and M is an integer greater than 0. The target AP may send the information of the free contention period to the M target STAs. M target STAs compete to send uplink data to the target AP within the free contention period. According to the foregoing description, it can be seen that the target AP sends the target data to be sent within the target time period. The first AP sends the first data to be sent within the first time period. Therefore, the present application can reduce the probability of collision between the STA and the AP, thereby improving communication efficiency.

In an optional manner of the first aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. The wireless communication method further includes: within the free contention period, the AP interface of the target AP receives the uplink data sent by the M target STAs and the first AP through OFDMA. Wherein, the first AP may also participate in the competition of the free competition time period, thereby improving the flexibility of communication. Moreover, receiving data through OFDMA can improve the utilization rate of RUs, thereby improving communication efficiency.

In an optional manner of the first aspect, the wireless communication method further includes: the target AP receives an activation frame from an access controller (AC). The target AP sends the first request to the first AP according to the activation frame. The first request is used to request first traffic information. Wherein, any AP in the WDS can be used as the target AP. Therefore, if the AP itself decides whether to become the target AP, it will cause management confusion. In this application, the target AP is activated through the AC, which can facilitate management.

In an optional manner of the first aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Among them, Y is greater than X. Wherein, the greater the number of adjacent APs, the greater the probability of conflict between APs. Therefore, an AP with a larger number of associated APs may be selected as a target AP, thereby further reducing the probability of conflict between APs, thereby improving communication efficiency.

In an optional manner of the first aspect, the first traffic information includes a first modulation and coding strategy (modulation and coding strategy, MCS) and/or a first communication identifier (trafficidentifier, TID) of the first data to be sent . The target AP obtains the first time period and the target time period according to the first queue size information, the target queue size information, the first MCS and/or the first TID. Wherein, the target AP may calculate the theoretical transmission speed according to the first MCS, and then calculate the first time period according to the theoretical transmission speed. Therefore, the MCS can improve the accuracy of calculating the first time period, and avoid allocating too long or too short time periods to the first AP. The priority represented by the first TID is positively correlated with the duration of the first time period. Therefore, the first TID can be used to modify the first time period, so that the AP carrying the TID with high priority can occupy a longer TXOP time, so as to ensure the quality of service.

In an optional manner of the first aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 1. The wireless communication method further includes: the target AP determines the priorities of the M target STAs according to the target TID of the target data to be sent. The M target STAs include high-priority STAs and low-priority STAs. The target AP allocates RUs for the first high priority queue and the first low priority queue. The first high priority queue includes high priority STAs and the first AP. The first low priority queue includes low priority STAs. During the target time period, the target AP sends the target data to be sent according to the allocated RU. Among them, the delay of data transfer between APs will seriously reduce the communication efficiency of WDS. In this application, the communication efficiency of the WDS can be improved by preferentially forwarding the data of the AP.

In an optional manner of the first aspect, the target AP allocates RUs in the first period to the first high-priority queue and the first low-priority queue. The wireless communication method further includes: the target AP allocates RUs of a second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period. Wherein, the target AP periodically allocates RUs to the target STA and the first AP. In each cycle, the target AP reclassifies the STAs. STA levels include high priority and low priority. The target AP first allocates RUs to high-priority STAs. In the first cycle of RU allocation, there may be some STAs in the first high-priority queue that are not allocated to RUs. In the second period of RU allocation, the target AP directly regards some STAs as high-priority STAs. In the second period, it is possible to prevent the target AP from classifying some STAs as low priorities, and increase the probability of allocating RUs to this part of STAs. Therefore, the present application can improve the fairness of RU allocation and improve communication quality.

The second aspect of the present application provides a wireless communication method. The wireless communication method includes: a first access point AP sends first flow information to a target AP. The first flow information includes first queue size information of the first data to be sent by the first AP. The first AP receives information of the first time period from the target AP. Wherein, the first time period is different from the target time period, and the target time period and the first time period are obtained by the target AP according to the first queue size information and the target flow information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP is used to send the target data to be sent within the target time period. The first AP sends the first data to be sent within the first time period.

In an optional manner of the second aspect, the AP interface of the first AP is associated with N STAs of the first station. N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. During the first time period, the AP interface of the first AP sends the downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA.

In an optional manner of the second aspect, the STA interface of the first AP is associated with the AP interface of the target AP. During the first time period, the first AP sends the uplink data in the first data to be sent to the target AP through the STA interface of the first AP.

In an optional manner of the second aspect, the STA interface of the first AP is associated with the AP interface of the target AP. The wireless communication method further includes: within the target time period, the first AP receives downlink data in the target data to be sent from the target AP through the STA interface of the first AP.

In an optional manner of the second aspect, the STA interface of the first AP is associated with the AP interface of the target AP. The wireless communication method further includes: within the target time period, the first AP receives uplink data in the target data to be sent from the target AP through the AP interface of the first AP.

In an optional manner of the second aspect, the wireless communication method further includes: the first AP receives information about the free contention period from the target AP. The free competition time period is different from the first time period and the target time period. The STA interface of the first AP is associated with the target AP. The STA interface of the first AP competes to send uplink data to the target AP within the free competition period.

In an optional manner of the second aspect, the AP interface of the first AP is associated with N first STAs, where N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. The wireless communication method further includes: during the free contention period, the AP interface of the first AP receives the uplink data sent by the N first STAs and the target AP through OFDMA.

In an optional manner of the second aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Among them, Y is greater than X.

In an optional manner of the second aspect, the first flow information includes a first MCS and/or a first TID of the first data to be sent. The target time period and the first time period are obtained by the target AP according to the first queue size information, the target queue size information, the first MCS and/or the first TID.

In an optional manner of the second aspect, the AP interface of the first AP is associated with N first STAs. N is an integer greater than 1. The wireless communication method further includes: the first AP determines the priorities of the N first STAs according to the first TID of the first data to be sent. The N first STAs include high-priority STAs and low-priority STAs. The first AP allocates RUs to the first high-priority queue and the first low-priority queue. The first high-priority queue includes high-priority STAs and target APs. The first low priority queue includes low priority STAs. During the first time period, the first AP sends the first data to be sent according to the allocated RU.

In an optional manner of the second aspect, the first AP allocates RUs in the first period to the first high-priority queue and the first low-priority queue. The wireless communication method further includes: the first AP allocates RUs of a second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period.

The third aspect of the present application provides a wireless distribution system WDS. The WDS includes a target AP and a first AP. The first AP is used to send the first flow information to the target AP. The first flow information includes first queue size information of the first data to be sent of the first AP. The target AP is used to obtain target traffic information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP is configured to obtain the first time period and the target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The target AP is configured to send information of the first time period to the first AP. The first AP is used to send the first data to be sent within the first time period. The target AP is used to send the target data to be sent within the target time period.

In an optional manner of the third aspect, the AP interface of the target AP is associated with M target station STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. During the target time period, the AP interface of the target AP sends the downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA.

In an optional manner of the third aspect, the STA interface of the target AP is associated with the AP interface of the first AP. During the target time period, the target AP is used to send the uplink data in the target data to be sent to the first AP through the STA interface of the target AP.

In an optional manner of the third aspect, the AP interface of the first AP is associated with the STA interface of the target AP. The AP interface of the first AP is associated with the N first STA interfaces. M is an integer greater than 0. The first AP is configured to send the downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA within the first time period.

In an optional manner of the third aspect, the STA interface of the first AP is associated with the AP interface of the target AP. The first AP sends the uplink data in the first data to be sent to the target AP through the STA interface of the first AP within the first time period.

In an optional manner of the third aspect, the target AP is also used to obtain a free competition time period according to the free competition time period. There is no overlapping time period between the first time period, the target time period and the free competition time period, that is, the free competition time period is different from the first time period and the target time period.

In an optional manner of the third aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. During the free contention period, the AP interface of the target AP receives the uplink data sent by the M target STAs and the first AP through OFDMA.

In an optional manner of the third aspect, the AP interface of the first AP is associated with N first STAs, where N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. During the free contention period, the AP interface of the first AP receives the uplink data sent by the N first STAs and the target AP through OFDMA.

In an optional manner of the third aspect, the target AP is also configured to receive the activation frame from A. The target AP is further configured to send the first request to the first AP according to the activation frame. The first AP is configured to send the first flow information to the target AP according to the first request.

In an optional manner of the third aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Among them, Y is greater than X.

In an optional manner of the third aspect, the first traffic information includes a first MCS and/or a first TID of the first data to be sent. The target AP is configured to obtain the first time period and the target time period according to the first queue size information, the target queue size information, the first MCS and/or the first TID.

In an optional manner of the third aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 1. The target AP is also used to determine the priorities of the M target STAs according to the target TID of the target data to be sent. The M target STAs include high-priority STAs and low-priority STAs. The target AP is used to allocate RUs to the first high priority queue and the first low priority queue. During the target time period, the target AP is used to send the target data to be sent according to the allocated RU. The first high priority queue includes high priority STAs and the first AP. The first low priority queue includes low priority STAs.

In an optional manner of the third aspect, the target AP is configured to allocate RUs in the first period to the first high-priority queue and the first low-priority queue. The target AP is also used to allocate RUs of the second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period.

In an optional manner of the third aspect, the AP interface of the first AP is associated with N first STAs. N is an integer greater than 1. The first AP is configured to determine priorities of the N first STAs according to the first TID of the first data to be sent. The N first STAs include high-priority STAs and low-priority STAs. The first AP is used to allocate RUs to the first high-priority queue and the first low-priority queue. During the first time period, the first AP is used to send the first data to be sent according to the allocated RU. Wherein, the first high-priority queue includes high-priority STAs and target APs. The first low priority queue includes low priority STAs.

In an optional manner of the third aspect, the first AP is configured to allocate RUs in the first period to the first high-priority queue and the first low-priority queue. The first AP is also used to allocate RUs of the second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period.

A fourth aspect of the present application provides a wireless communication device. The wireless communication device includes a receiving module, an acquiring module, a processing module, a first sending module and a second sending module. Wherein, the receiving module is used for receiving the first flow information from the first AP. The first flow information includes first queue size information of the first data to be sent by the first AP. The obtaining module is used to obtain target traffic information. The target traffic information includes target queue size information of target data to be sent by the wireless communication device. The processing module is configured to obtain the first time period and the target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The first sending module is configured to send the information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent within the first time period. The second sending module is used for sending the target data to be sent within the target time period.

In an optional manner of the fourth aspect, the AP interface of the wireless communication device is associated with M target STAs. M is an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the first AP. The second sending module is specifically configured to send the downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA within the target time period.

In an optional manner of the fourth aspect, the STA interface of the wireless communication device is associated with the AP interface of the first AP. The second sending module is specifically configured to send the uplink data in the target data to be sent to the first AP through the STA interface of the wireless communication device within the target time period.

In an optional manner of the fourth aspect, the STA interface of the wireless communication device is associated with the AP interface of the first AP.

The receiving module is further configured to receive downlink data in the first data to be sent from the first AP through the STA interface of the wireless communication device within the first time period.

In an optional manner of the fourth aspect, the AP interface of the wireless communication device is associated with the STA interface of the first AP. The receiving module is further configured to receive uplink data in the first data to be sent from the first AP through the AP interface of the wireless communication device within the first time period.

In an optional manner of the fourth aspect, the processing module is further configured to obtain a free competition time period according to the free competition time period. There is no overlapping time period between the first time period, the target time period and the free competition time period, that is, the free competition time period is different from the first time period and the target time period.

In an optional manner of the fourth aspect, the AP interface of the wireless communication device is associated with M target STAs. M is an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the first AP. The receiving module is also used to receive the uplink data sent by the M target STAs and the first AP through OFDMA during the free contention period.

In an optional manner of the fourth aspect, the receiving module is further configured to receive an activation frame from the AC. The receiving module is further configured to send a first request to the first AP according to the activation frame. The first request is used to request first traffic information.

In an optional manner of the fourth aspect, the number of APs associated with the first AP is X, and the number of APs associated with the wireless communication device is Y. Among them, Y is greater than X.

In an optional manner of the fourth aspect, the first flow information includes a first MCS and/or a first TID of the first data to be sent. The processing module is specifically configured to obtain the first time period and the target time period according to the first queue size information, the target queue size information, the first MCS and/or the first TID.

In an optional manner of the fourth aspect, the AP interface of the wireless communication device is associated with M target STAs. M is an integer greater than 1. The processing module is further configured to determine the priorities of the M target STAs according to the target TID of the target data to be sent. The M target STAs include high-priority STAs and low-priority STAs. The processing module is further configured to allocate RUs to the first high-priority queue and the first low-priority queue. Within the target time period, the second sending module is specifically configured to send the target data to be sent according to the allocated RU. The first high priority queue includes high priority STAs and the first AP. The first low priority queue includes low priority STAs.

In an optional manner of the fourth aspect, the processing module is specifically configured to allocate RUs of the first period to the first high-priority queue and the first low-priority queue. The processing module is further configured to allocate RUs of the second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period.

A fifth aspect of the present application provides a wireless communication device. The wireless communication device includes a first sending module, a receiving module and a second sending module. The first sending module is used for sending the first flow information to the target AP. The first flow information includes first queue size information of first data to be sent by the wireless communication device. The receiving module is used for receiving the information of the first time period from the target AP. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target flow information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP is used to send the target data to be sent within the target time period. The second sending module is used for sending the first data to be sent within the first time period.

In an optional manner of the fifth aspect, the AP interface of the wireless communication device is associated with N first station STAs. N is an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the target AP. The second sending module is specifically configured to send the downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA within the first time period.

In an optional manner of the fifth aspect, the STA interface of the wireless communication device is associated with the AP interface of the target AP. During the first time period, the second sending module is specifically configured to send the uplink data in the first data to be sent to the target AP through the STA interface of the wireless communication device.

In an optional manner of the fifth aspect, the STA interface of the wireless communication device is associated with the AP interface of the target AP. During the target time period, the receiving module is further configured to receive downlink data in the target data to be sent from the target AP through the STA interface of the wireless communication device.

In an optional manner of the fifth aspect, the STA interface of the wireless communication device is associated with the AP interface of the target AP. During the target time period, the receiving module is further configured to receive uplink data in the target data to be sent from the target AP through the AP interface of the wireless communication device.

In an optional manner of the fifth aspect, the receiving module is further configured to receive the information of the free contention period from the target AP. The free competition time period is different from the first time period and the target time period. The STA interface of the wireless communication device is associated with the target AP. The second sending module is also configured to compete to send uplink data to the target AP through the STA interface of the wireless communication device within the free contention period.

In an optional manner of the fifth aspect, the AP interface of the wireless communication device is associated with N first STAs, where N is an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the target AP. During the free contention period, the receiving module is also used to receive uplink data sent by the N first STAs and the target AP through OFDMA.

In an optional manner of the fifth aspect, the number of APs associated with the wireless communication device is X, and the number of APs associated with the target AP is Y. Among them, Y is greater than X.

In an optional manner of the fifth aspect, the first traffic information includes a first MCS and/or a first TID of the first data to be sent. The target time period and the first time period are obtained by the target AP according to the first queue size information, the target queue size information, the first MCS and/or the first TID.

In an optional manner of the fifth aspect, the AP interface of the wireless communication device is associated with N first STAs. N is an integer greater than 1. The wireless communication device also includes a processing module. The processing module is configured to determine the priorities of the N first STAs according to the first TID of the first data to be sent. The N first STAs include high-priority STAs and low-priority STAs. The wireless communication device allocates RUs to the first high priority queue and the first low priority queue. During the first time period, the second sending module is specifically configured to send the first data to be sent according to the allocated RU. The first high-priority queue includes high-priority STAs and target APs. The first low priority queue includes low priority STAs.

In an optional manner of the fifth aspect, the processing module is specifically configured to allocate RUs of the first period to the first high-priority queue and the first low-priority queue. The processing module is further configured to allocate RUs of the second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period.

The sixth aspect of the present application provides a target AP. Target APs include transceivers and processors. Wherein, the transceiver is used for receiving the first flow information from the first AP. The first flow information includes first queue size information of the first data to be sent by the first AP. The processor is used to obtain target traffic information. The target flow information includes target queue size information of target data to be sent by the target AP. The processor is further configured to obtain the first time period and the target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The transceiver is further configured to send information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent within the first time period. The transceiver is also used to send the target data to be sent within the target time period.

In an optional manner of the sixth aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. The transceiver is specifically configured to send the downlink data in the target to-be-sent data to the M target STAs and the first AP through OFDMA within the target time period.

In an optional manner of the sixth aspect, the STA interface of the target AP is associated with the AP interface of the first AP. The transceiver is specifically configured to send the uplink data in the target data to be sent to the first AP through the STA interface of the target AP within the target time period.

In an optional manner of the sixth aspect, the STA interface of the target AP is associated with the AP interface of the first AP. The transceiver is further configured to receive downlink data in the first data to be sent from the first AP through the STA interface of the target AP within the first time period.

In an optional manner of the sixth aspect, the AP interface of the target AP is associated with the STA interface of the first AP. The transceiver is also used to receive uplink data in the first data to be sent from the first AP through the AP interface of the target AP within the first time period.

In an optional manner of the sixth aspect, the processor is further configured to obtain a free competition time period according to the free competition time period. There is no overlapping time period between the first time period, the target time period and the free competition time period, that is, the free competition time period is different from the first time period and the target time period.

In an optional manner of the sixth aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. The transceiver is also used to receive uplink data sent by the M target STAs and the first AP through OFDMA during the free contention period.

In an optional manner of the sixth aspect, the transceiver is further configured to receive an activation frame from the AC. The transceiver is further configured to send a first request to the first AP according to the activation frame. The first request is used to request first traffic information.

In an optional manner of the sixth aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Among them, Y is greater than X.

In an optional manner of the sixth aspect, the first traffic information includes a first MCS and/or a first TID of the first data to be sent. The processor is specifically configured to obtain the first time period and the target time period according to the first queue size information, the target queue size information, the first MCS and/or the first TID.

In an optional manner of the sixth aspect, the AP interface of the target STA is associated with M target STAs. M is an integer greater than 1. The processor is further configured to determine the priorities of the M target STAs according to the target TID of the target data to be sent. The M target STAs include high-priority STAs and low-priority STAs. The processor is also configured to allocate RUs to the first high priority queue and the first low priority queue. During the target time period, the transceiver is specifically configured to send the target data to be sent according to the allocated RU. The first high priority queue includes high priority STAs and the first AP. The first low priority queue includes low priority STAs.

In an optional manner of the sixth aspect, the processor is specifically configured to allocate the RUs of the first period to the first high-priority queue and the first low-priority queue. The processor is further configured to allocate RUs of the second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period.

The seventh aspect of the present application provides a first AP. The first AP includes a transceiver and a processor. Wherein, the transceiver is used for sending the first traffic information to the target AP. The first flow information includes first queue size information of the first data to be sent by the first AP. The transceiver is also used to receive information from the target AP for the first time period. The processor is used for reading the information of the first time period. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target flow information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP is used to send the target data to be sent within the target time period. The transceiver is also used to send the first data to be sent within the first time period.

In an optional manner of the seventh aspect, the AP interface of the first AP is associated with N STAs of the first station. N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. The transceiver is specifically configured to send the downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA within the first time period.

In an optional manner of the seventh aspect, the STA interface of the first AP is associated with the AP interface of the target AP. In the first time period, the transceiver is specifically configured to send the uplink data in the first data to be sent to the target AP through the STA interface of the wireless communication device.

In an optional manner of the seventh aspect, the STA interface of the first AP is associated with the AP interface of the target AP. During the target time period, the transceiver is also used to receive downlink data in the target data to be sent from the target AP through the STA interface of the first AP.

In an optional manner of the seventh aspect, the STA interface of the first AP is associated with the AP interface of the target AP. During the target time period, the transceiver is also used to receive uplink data in the target data to be sent from the target AP through the AP interface of the first AP.

In an optional manner of the seventh aspect, the transceiver is further configured to receive information about a free contention period from the target AP. The free competition time period is different from the first time period and the target time period. The STA interface of the first AP is associated with the target AP. The transceiver is also used to compete to send uplink data to the target AP through the STA interface of the first AP within the free contention period.

In an optional manner of the seventh aspect, the AP interface of the first AP is associated with N first STAs, where N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. During the free contention period, the transceiver is also used to receive uplink data sent by the N first STAs and the target AP through OFDMA.

In an optional manner of the seventh aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Among them, Y is greater than X.

In an optional manner of the seventh aspect, the first traffic information includes a first MCS and/or a first TID of the first data to be sent. The target time period and the first time period are obtained by the target AP according to the first queue size information, the target queue size information, the first MCS and/or the first TID.

In an optional manner of the seventh aspect, the AP interface of the first AP is associated with N first STAs. N is an integer greater than 1. The processor is configured to determine the priorities of the N first STAs according to the first TID of the first data to be sent. The N first STAs include high-priority STAs and low-priority STAs. The first AP allocates RUs to the first high-priority queue and the first low-priority queue. During the first time period, the transceiver is specifically configured to send the first data to be sent according to the allocated RU. The first high-priority queue includes high-priority STAs and target APs. The first low priority queue includes low priority STAs.

In an optional manner of the seventh aspect, the processor is specifically configured to allocate the RUs of the first cycle to the first high-priority queue and the first low-priority queue. The processor is further configured to allocate RUs of the second period to the second high priority queue and the second low priority queue. Wherein, the second high-priority queue includes STAs in the first high-priority queue that are not assigned RUs in the first period.

The eighth aspect of the present application provides a computer storage medium, which is characterized in that instructions are stored in the computer storage medium, and when the instructions are executed on the computer, the computer executes the computer according to the first aspect or any of the first aspects. The method described in one implementation manner; or causing the computer to execute the method described in the second aspect or any one implementation manner of the second aspect.

The ninth aspect of the present application provides a computer program product, which is characterized in that, when the computer program product is executed on a computer, the computer executes the method described in the first aspect or any implementation manner of the first aspect ; or causing the computer to execute the method as described in the second aspect or any implementation manner of the second aspect.

Description of drawings

FIG. 1 is a schematic flow diagram of a wireless communication method provided in this application;

Fig. 2 is the first schematic structural diagram of the WDS provided in this application;

FIG. 3 is a schematic structural diagram of the first flow information provided in this application;

Figure 4 is a schematic diagram of the distribution of time periods provided in this application;

FIG. 5 is a second structural schematic diagram of the WDS provided in this application;

FIG. 6 is a third structural schematic diagram of the WDS provided in this application;

FIG. 7 is a schematic flow chart of the RU allocation method provided in this application;

FIG. 8 is a fourth structural schematic diagram of the WDS provided in this application;

FIG. 9 is a fifth structural schematic diagram of the WDS provided in this application;

FIG. 10 is a schematic diagram of the first structure of the wireless communication device provided in this application;

FIG. 11 is a second structural schematic diagram of the wireless communication device provided in this application;

Fig. 12 is a schematic structural diagram of a communication device provided in this application.

detailed description

The present application provides a wireless communication method, device and WDS. By allocating different time periods for the target AP and the first AP, the probability of conflict between the first AP and the target AP can be reduced, thereby improving communication efficiency.

It should be understood that "first", "second", "target" and the like used in this application are only used for the purpose of distinguishing and describing, and cannot be interpreted as indicating or implying relative importance, nor indicating or implying order. In addition, reference numerals and/or letters are repeated in the various figures of this application for the sake of brevity and clarity. Repetition does not imply a strictly limited relationship between the various embodiments and/or configurations. Exemplarily, the features or contents marked with dotted lines in the drawings of the present application may be understood as optional operations or optional structures of the embodiments.

The wireless communication method in this application is applied in the field of wireless communication. In the field of wireless communication, multiple access points (access point, AP) can form a wireless distribution system (wireless distribution system, WDS) through frame exchange. In WDS, only APs competing for a transmission opportunity (transmission opportunity, TXOP) can send data. However, multiple APs may compete for TXOP at the same time. At this time, multiple APs will send data at the same time. Therefore, multiple APs interfere with each other, resulting in data transmission failure, making the communication efficiency of the WDS low.

To this end, the present application provides a wireless communication method. FIG. 1 is a schematic flowchart of a wireless communication method provided in this application. As shown in Fig. 1, the wireless communication method includes the following steps.

In step 101, an access control point (access controller, AC) sends an activation frame to a target AP.

In this application, the AC needs to select an AP in the WDS as a centralized control point for time domain resources, and this AP is the target AP. The target AP can be any AP in WDS. For example, FIG. 2 is a schematic diagram of the first structure of the WDS provided in this application. As shown in FIG. 2 , the WDS includes AC 201 , AP 202 , AP 203 , AP 204 , STA 205 , AP 206 , and STA 207 . Wherein, the AC 201 is integrated on a routing AP (Root AP). The wide area network interface (WAN interface) of the routing AP is connected to the public network. The AP interface of the routing AP is associated with the STA interface of AP 202 . The AP interface of AP 202 is associated with the STA interface of AP 204 . The AP interface of AP 204 is associated with the STA interfaces of AP 203 and AP 206 . The AP interface of AP 204 is also associated with STA 205 . The AP interface of AP 206 is associated with STA 207 . The target AP may be any one of the routing AP, AP 202 , AP 203 , AP 204 and AP 206 . The first AP may be any AP in the WDS except the target AP.

In practical applications, the greater the number of adjacent APs, the greater the probability of conflict between APs. Therefore, the AC can select an AP associated with many APs as the target AP. Specifically, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Y is greater than X. For example, in the WDS of Figure 2, AC 201 selects AP 204 as the target AP. The first AP may be any one or more of the routing AP, AP 202 , AP 203 and AP 206 . In this application, the target AP may also allocate frequency domain resources to the first AP. At this time, the first AP is an AP associated with the target AP. For convenience of description, AP 206 will be used as the first AP as an example for description later.

After AC 201 selects AP 204 as a target AP, AC 201 sends an activation frame to AP 204 . This application does not limit the format of the activation frame. The format of the activation frame may be agreed upon by AC 201 and AP 204 in advance.

In step 102, the target AP sends a first request to the first AP. After the target AP receives the activation frame, the target AP collects the traffic information of the first AP. Specifically, the target AP sends a first request to the first AP, requesting the first AP to report traffic information.

In step 103, the first AP sends first flow information to the target AP.

After receiving the first request, the first AP sends the first flow information to the target AP. The first flow information and the first request may be management frames or data frames. The first flow information includes information related to the first data to be sent, such as first queue size information. The first data to be sent is data that is about to be sent by the first AP but has not yet been sent. The sender of the first data to be sent is the first AP. The receiving end of the first data to be sent is an AP or STA associated with the first AP. According to different receiving ends, the first data to be sent may be pre-transmission data or return data. Specifically, the data sent by the AP 206 to the STA 207 is called pre-haul data. The data sent by AP 206 to AP 204 is called return data. Fig. 3 is a schematic structural diagram of the first flow information provided in this application. As shown in FIG. 3 , the first traffic information includes a first AP identifier 301 , forward traffic information 302 and backhaul traffic information 303 . The forwarding traffic information 302 includes information about forwarding data. The backhaul traffic information 303 includes information about backhaul data. The fronthaul traffic information 302 and the backhaul traffic information 303 include one or more sets of data. Each set of data includes queue size information, TID and MCS of the first data to be sent. The queue size information of the first data to be sent is also referred to as first queue size information. The first queue size information represents the data size of the first data to be sent.

It should be understood that when the first data to be sent by the first AP does not include the returned data, the first flow information may not include the returned flow information 303 . Similarly, when the first data to be sent by the first AP does not include the forward data, the first traffic information may not include the forward traffic information 302 . In addition, the AP 206 may need to send multiple pieces of first to-be-sent data with different priorities to the STA 207 . Therefore, there is no strict correspondence between the number of data groups in the fronthaul traffic information and the number of STAs associated with the first AP.

In step 104, the target AP acquires target traffic information.

The target flow information includes information about the data to be sent by the target, such as target queue size information. The target data to be sent is the data that the target AP is about to send but has not yet been sent. The sender of the target data to be sent is the target AP. The receiver of the target data to be sent is the AP and/or STA associated with the target AP. Depending on the receiving end, the target data to be sent can be forward data or return data. Specifically, the data sent by the AP 204 to the AP 206, the AP 203 or the STA 205 is called pre-haul data. The data sent by AP 204 to AP 202 is called return data. Regarding the structure of the target traffic information, reference may be made to the structure of the first traffic information in step 103 above. Wherein, the queue size information in the target traffic information is also referred to as target queue size information.

In step 105, the target AP obtains the first time period and the target time period according to the target flow information and the first flow information.

Target traffic information includes target queue size information. The first traffic information includes first queue size information. Therefore, obtaining the first time period and the target time period by the target AP according to the target flow information and the first flow information may also be understood as that the target AP obtains the first time period and the target time period according to the target queue size information and the first queue size information. The time for the AP to send data is related to the queue size information. Therefore, after obtaining the target queue size information and the first queue size information, the target AP can obtain the first duration and the target duration according to the target queue size information and the first queue size information. According to actual needs, the target AP can calculate the first duration and the target duration in different ways. An exemplary description will be given below.

In the first example, the target AP calculates the first duration and the target duration through Formula 1 and Formula 2. Formula 1 and Formula 2 are as follows:

Wherein, i is equal to the number of the first AP plus the number of the target AP, that is, i is equal to the number of the first AP plus 1. i is equal to 2 when the WDS includes only one first AP. It can be seen from the foregoing description of FIG. 3 that the first traffic information or target traffic information may include one or more sets of data. For convenience of description, the present application assumes that the first traffic information includes the first set of data, and the target traffic information includes the second set of data. QueueSize _i represents the queue size of the i-th group of data. Rate _i represents the theoretical rate obtained from the MCS of the i-th group of data. Ci _TID represents the correction coefficient obtained according to the TID of the i-th group of data. Ci _TID is used to correct the problem that low-priority TIDs may occupy a longer TXOP duration. For example, the higher the priority represented by the TID, the larger the value of Ci _TID ; the lower the priority represented by the TID, the smaller the value of Ci _TID . Overhead represents other fixed overheads, such as packet headers, checksums, and so on. In practical applications, the target AP may periodically collect the first traffic information of the first AP, and then periodically calculate the first duration according to the first traffic information. TimePeriod is the period length. TimeAlloc _i is the TXOP duration allocated to the AP corresponding to the i-th group of data. According to the above formula, the target AP can obtain the first duration and the target duration. Wherein, the first duration is the TXOP duration of the first AP. The target duration is the TXOP duration of the target AP.

In the second example, the target AP calculates the first duration and the target duration through Formula 1 and Formula 3. Formula 3 is as follows:

Among them, FreeTime is the duration of free competition. For other descriptions, please refer to the relevant descriptions in Formula 1 and Formula 2 above. In formula 3, by introducing the free competition period, it can prepare for the subsequent free competition period.

Through any one of the above examples, the target AP may obtain the first duration and the target duration. After obtaining the first duration and the target duration, the target AP obtains the first time period according to the first duration. The duration of the first time period is the first duration. The target AP obtains the target time period according to the target duration. The duration of the target time period is the target duration. Wherein, there is no overlapping time period between the first time period and the target time period, that is, the first time period is different from the target time period.

The target AP can also obtain the free competition time period according to the free competition time period. The duration of the free competition period is the free competition period. Wherein, the cycle duration is equal to the sum of the first duration, the target duration, and the free competition duration. For example, the cycle duration is 10 milliseconds. The starting moment of the cycle is 0 milliseconds. The end of the period is 10 milliseconds. The first duration is 2 milliseconds, the target duration is 3 milliseconds, and the free competition duration is 5 milliseconds. The start moment of the free competition period is 0 milliseconds. The end time of the free contention period is 5 milliseconds. The starting moment of the target time period is 5 milliseconds. The end moment of the target time period is 8 milliseconds. The starting moment of the first time period is 8 milliseconds. The end moment of the first time period is 10 milliseconds.

In other embodiments, the context relationship between the first time period and the target time period is related to TID. Specifically, when the priority of the first TID representation in the first set of data is higher than the priority of the target TID representation in the second set of data, the first time period is before the target time period. For example, the starting moment of the first time period is 0 milliseconds. The end moment of the first time period is 2 milliseconds. The starting moment of the target time period is 2 milliseconds. The end moment of the target time period is 5 milliseconds. When the priority of the first TID representation in the first set of data is lower than the priority of the target TID representation in the second set of data, the first time period is after the target time period. Wherein, by associating the contextual relationship between the first time period and the target time period with the TID, high-priority data can be sent preferentially, thereby improving communication quality.

In other embodiments, the free contention period is at the end of the cycle duration. Specifically, FIG. 4 is a schematic diagram of the distribution of time periods provided in this application. As shown in FIG. 4 , a period includes a target time period 401 , a first time period 402 and a free competition time period 403 . The free competition period 403 is at the end of a period. It should be understood that the time period distribution shown in FIG. 4 is just an example. Those skilled in the art can make adaptive changes according to requirements. Adaptive changes include but are not limited to any of the following.

For example, in FIG. 4 , one cycle duration includes only one first time period. In practical applications, one period may include multiple first time periods. Specifically, the target AP receives i-1 pieces of first flow information from i-1 first APs, where i is an integer greater than 2. Each piece of first flow information includes a queue size information of data to be sent by the first AP. The target AP obtains i time periods according to the i-1 queue size information and the target queue size information. The i time periods include i−1 first time periods and target time periods. The i time periods are different from each other. The i-1 first time periods are in one-to-one correspondence with the i-1 first APs. At this time, a plurality of first time periods are included in one cycle duration.

For example, in FIG. 4, each time period is continuous in time. In practical applications, the time periods may not be continuous. For example, the target time period includes a first target time period and a second target time period. The starting moment of the first target time period is 0 milliseconds. The end moment of the first target time period is 1 millisecond. The starting moment of the first time period is 1 millisecond. The end moment of the first time period is 3 milliseconds. The starting moment of the second target time period is 3 milliseconds. The end moment of the second target time period is 5 milliseconds. The starting moment of the free contention period is 5 milliseconds. The end time of the free contention period is 10 milliseconds.

In step 106, the target AP sends information of the first time period to the first AP. The first time period may include one or more time periods. In one example, if the first time period includes a time period, the information of the first time period includes a start time and an end time of a time period.

In step 107, the target AP sends the target data to be sent within the target time period.

If the target time period has not been exhausted and the target AP has sent the target data to be sent, the target AP can also send other data. Conversely, when the target time period is exhausted, the target AP may not have finished sending the target data to be sent. At this time, the target AP has sent part of the target data to be sent within the target time period. In another possible manner, when the target time period has not been exhausted and the target AP has not finished sending the target data to be sent, the target AP may receive data to be sent with a higher priority. At this time, the target AP may first send the data to be sent with a higher priority. After the target AP sends the data to be sent with higher priority, if the target time period has not been exhausted, the target AP can continue to send the target data to be sent.

In order to improve the utilization rate of the RU, the target AP may send the target data to be sent to the first AP and the target STA through OFDMA. Specifically, according to the foregoing description of FIG. 2 , it can be known that the AP interface of the AP 204 is associated with the STA interface of the AP 206 . The AP interface of AP 204 is associated with STA 205 . Fig. 5 is a schematic diagram of the second structure of the WDS provided in this application. As shown in FIG. 5 , the AP interface of AP 204 is associated with STA 205 and AP 206 . During the target time period, the AP interface of the AP 204 sends the downlink data in the target data to be sent to the STA 205 and the AP 206 through OFDMA.

In other embodiments, in order to provide flexibility in wireless communication, in this application, an association relationship between the STA interface of the AP 204 and the AP interface of the AP 206 may be established. As shown in FIG. 5 , the STA interface of AP 204 and the AP interface of AP 206 . During the target time period, the STA interface of the AP 204 sends to the AP 206 the uplink data in the target data to be sent.

Assume that AP 202 is the first AP. It can be known from the foregoing description of FIG. 2 that the AP interface of the AP 202 is associated with the STA interface of the AP 204 . In order to improve the utilization rate of the RU, in this application, an association relationship between the STA interface of the AP 202 and the AP interface of the AP 204 may be established. As shown in FIG. 5 , the AP interface of AP 204 is associated with STA 205 and AP 202 . During the target time period, the AP interface of the AP 204 sends the downlink data in the target data to be sent to the STA 205 and the AP 202 through OFDMA.

When both AP 202 and AP 206 are the first AP, the AP interface of AP 204 sends downlink data in the target data to be sent to STA 205, AP 202 and AP 206 through OFDMA. Fig. 6 is a third structural schematic diagram of the WDS provided in this application. As shown in FIG. 6 , the WDS includes AP 202 , AP 204 , AP 206 and STA 205 . AP 204 allocates spectrum resources for STA 205 , AP 202 and AP 206 . For example, in FIG. 6 , AP 204 allocates an RU1 to AP 202 . AP 204 allocates one RU2 to AP 206 . AP 204 allocates one RU4 to STA 205 . During the target time period, the AP 204 sends the downlink data in the target data to be sent to the STA 205 , the AP 202 and the AP 206 according to the allocated RU. About RU1, RU2, RU4 represent different types of RUs. For the type of RU, please refer to the subsequent related description.

In practical applications, the delay in data transfer between APs will seriously reduce the communication efficiency of WDS. For this reason, during the process of RU allocation, the target AP may preferentially allocate RUs to the first AP. Specifically, FIG. 7 is a schematic flowchart of the RU allocation method provided in this application. It should be understood that the RU allocation method in this application is applicable to any AP in the WDS, such as the target AP and the first AP. The RU allocation method will be described below by taking the target AP as an example. As shown in Figure 7, the RU allocation method includes the following steps.

In step 701, the target AP acquires the target data to be sent of the M target STAs and the first AP.

For convenience of description, it is assumed that M is equal to 2. The 2 target STAs include a first target STA and a second target STA. The target data to be sent includes data1, data2 and data3. The related information of the data to be sent by the target is shown in Table 1.

Receiving end queue size information TID MCS Data 1 First target STA b1 T1 M1 Data 2 Second target STA b2 T2 M2 Data 3 First AP b3 T3 M3

Table I

As shown in Table 1, the receiving end of data 1 is the first target STA, and the receiving end of data 2 is the second target STA. The receiving end of data 3 is the first AP. It should be understood that in Table 1, b1, b2, M1, etc. are only used to distinguish the codes used for description, and do not represent values in actual applications.

In step 702, the target AP divides the M target STAs into high-priority STAs and low-priority STAs according to the TIDs in the target data to be sent. For example, the value of T1 is 0 or 1, and the target AP regards the first target STA as a high-priority STA. For example, the value of T2 is 2, and the target AP regards the second target STA as a low-priority STA.

In step 703, the target AP allocates RUs to the high priority queue. Wherein, the high-priority queue includes high-priority STAs and the first AP.

The target AP calculates the theoretical rate r _MCS that can be achieved by using the selected MCS when each receiving end occupies the entire channel bandwidth, and obtains M+1 r _MCS . For example, the MCS selected by the first target STA is M1. Then, the target AP divides the queue size information of each receiving end by the corresponding theoretical rate r _{MCS 1} to obtain M+1 theoretical transmission times. Among them, the M+1 theoretical transmission times are in one-to-one correspondence with the M+1 devices. The M+1 devices include M target STAs and a first AP. The target AP corresponds the M+1 theoretical transmission times with the association IDs of the M+1 devices one by one, and obtains M+1 binary groups. Each 2-tuple includes a theoretical transit time and an association ID. The target AP sorts the M+1 2-tuples according to the theoretical transmission time from largest to smallest.

表示该信道带宽为b_w时所有可能的RU分配方案的集合。该集合中元素的数量K是有限的。假设，RU1为26个子载波的RU。RU2为52个子载波的RU。RU3为106个子载波的RU。RU4为242个子载波的RU。RU5为484个子载波的RU。对于P_(bw)中的其中一种方案P_m。目标AP将其中的RU排列成从大到小的RU队列。例如RU队列为{RU5，…，RU5，RU4，…，RU4，RU3，…，RU3，RU2，…，RU2，RU1，…，RU1}。其中，RU队列包括H个RU。目标AP将M+1个二元组与RU队列从首元素开始一一对应。具体地，M+1个二元组中的第一个二元组和RU队列中的第一RU对应。M+1个二元组中的第二个二元组和RU队列中的第二RU对应。依次类推。将对应的一个二元组和一个RU称为一个组合。若H大于或等于M+1，则目标AP可以得到M+1个组合。若H小于M+1，则目标AP可以得到H个组合。为了方便描述，假设H等于M+1，目标AP得到M+1个组合。对于每个组合，目标AP可以通过查表格得到一个理论速率r_{MCS 2}。例如，目标AP通过查询表二(表中未示出RU4和RU5)得到M+1个理论速率r_{MCS 2}。The target AP obtains the channel bandwidth b _w and

Indicates the set of all possible RU allocation schemes when the channel bandwidth is _bw . The number K of elements in this set is finite. Assume that RU1 is an RU with 26 subcarriers. RU2 is an RU with 52 subcarriers. RU3 is an RU with 106 subcarriers. RU4 is an RU with 242 subcarriers. RU5 is an RU with 484 subcarriers. For one of the schemes P _m in P _(bw) . The target AP arranges the RUs in it into an RU queue from large to small. For example, the RU queue is {RU5, ..., RU5, RU4, ..., RU4, RU3, ..., RU3, RU2, ..., RU2, RU1, ..., RU1}. Wherein, the RU queue includes H RUs. The target AP corresponds M+1 two-tuples to the RU queue one by one starting from the first element. Specifically, the first 2-tuple in the M+1 2-tuples corresponds to the first RU in the RU queue. The second 2-tuple in the M+1 2-tuples corresponds to the second RU in the RU queue. And so on. The corresponding two-tuple and one RU are called a combination. If H is greater than or equal to M+1, the target AP can obtain M+1 combinations. If H is less than M+1, the target AP can obtain H combinations. For the convenience of description, it is assumed that H is equal to M+1, and the target AP obtains M+1 combinations. For each combination, the target AP can obtain a theoretical rate r _{MCS 2} by looking up the table. For example, the target AP obtains M+1 theoretical rates r _{MCS 2} by looking up Table 2 (RU4 and RU5 are not shown in the table).

Table II

Wherein, QAM means quadrature amplitude modulation (quadrature amplitude modulation). QPSK stands for quadrature phase shift keying. BPSK stands for binary phase shift keying.

After getting M+1 theoretical rate r _{MCS 2} . The target AP determines the maximum theoretical rate T among the M+1 theoretical rates r _{MCS 2} . Calculate the throughput rate according to formula 4.

Wherein, Throughput is a throughput rate, and T _overhead is a fixed overhead for each data transmission, including short inter frame space (short inter frame space, SIFS), media access control (medium access control, MAC) layer processing overhead, and the like. b _i is the queue size information.

中的K个方案，目标AP重复上述过程，可以得到K个吞吐率。目标AP确定K个吞吐率中的最大吞吐率K1。目标AP选择K1对应的RU分配方案P1进行RU分配。具体地，目标AP将M+1个二元组与RU分配方案P1中的RU队列从首元素开始一一对应。例如，M+1个二元组中的第一个二元组和RU队列中的第一个RU对应。此时，目标AP将RU队列中的第一个RU分配给第一个二元组中的关联ID对应的目标STA或第一AP。例如，M+1个二元组中的第二个二元组和RU队列中的第二个RU对应。此时，目标AP将RU队列中的第二个RU分配给第二个二元组中的关联ID对应的目标STA或第一AP。依次类推，目标AP为其它的二元组对应的目标STA或第一AP分配RU。for

In the K schemes, the target AP repeats the above process to obtain K throughput rates. The target AP determines the maximum throughput rate K1 among the K throughput rates. The target AP selects the RU allocation scheme P1 corresponding to K1 for RU allocation. Specifically, the target AP corresponds the M+1 2-tuples to the RU queue in the RU allocation scheme P1 one by one starting from the first element. For example, the first 2-tuple in the M+1 2-tuples corresponds to the first RU in the RU queue. At this time, the target AP allocates the first RU in the RU queue to the target STA or the first AP corresponding to the association ID in the first two-tuple. For example, the second 2-tuple in the M+1 2-tuples corresponds to the second RU in the RU queue. At this time, the target AP allocates the second RU in the RU queue to the target STA or the first AP corresponding to the association ID in the second two-tuple. By analogy, the target AP allocates RUs to target STAs corresponding to other two-tuples or the first AP.

In step 704, the target AP determines whether there are remaining unallocated RUs.

Assume that in the RU allocation scheme P1, the number of elements in the RU queue is H. If H is greater than M+1, the target AP determines that there are remaining unallocated RUs. Execute step 705. If H is less than or equal to M+1, the target AP determines that there are no remaining unallocated RUs. Execute step 706.

In step 705, the target AP allocates RUs for the low priority queue. Wherein, the low priority queue includes low priority STAs. In the foregoing step 704, since H is greater than M+1, the RU allocation scheme P1 also includes the remaining unallocated RUs. The target AP allocates the remaining H-M-1 RUs to the STAs in the low-priority queue. Until the RUs in the RU queue are all allocated, or until each of the M+1 devices is allocated an RU.

In step 706, the target AP outputs an allocation plan. The target AP allocates a scheme for the M target STAs and the first AP according to the RU allocation scheme in step 704 or step 705 .

In practical applications, the target AP may periodically allocate RUs to the target STA and the first AP. In each cycle, the target AP reclassifies the STAs. STA levels include high priority and low priority. According to the description in FIG. 7 , it can be known that the target AP preferentially allocates RUs to high-priority STAs. In the first cycle of RU allocation, there may be some STAs in the first high-priority queue that are not allocated to RUs. For example, when H is smaller than M+1. In the second period of RU allocation, the target AP directly regards some STAs as high-priority STAs. In the second period, it is possible to prevent the target AP from classifying some STAs as low priorities, and increase the probability of allocating RUs to this part of STAs.

In other embodiments, it can be seen from the description in FIG. 7 that the target AP preferentially allocates RUs to high-priority STAs. Therefore, there may be a case where a low-priority STA is not allocated an RU in the first period. To ensure fairness, the STAs in the low-priority queue that are not allocated to RUs in the first period are used. In the second period, the target AP may put the STAs assigned to the RU into a high-priority queue.

In other embodiments, the target AP may determine the priority of the target STA according to the fairness factor and the TID of the target data to be sent. Specifically, in step 702. The target AP divides the M target STAs into high-priority STAs and low-priority STAs according to the TID of the target data to be sent and M fairness factors. The M fairness factors are in one-to-one correspondence with the M target STAs. For the STAs that were not allocated RUs in the previous period, in this period, the target AP changes the fairness factors of the STAs that are not allocated RUs. This increases the probability that STAs not allocated to RUs are allocated to high-priority queues.

In step 108, the first AP sends the first data to be sent within the first time period. For the description of the first data to be sent and the first time period, reference may be made to the description of the target data to be sent and the target time period in step 107 above.

It can be known from the foregoing description of FIG. 2 that the AP interface of the AP 202 is associated with the STA interface of the AP 204 . In order to improve the utilization rate of the RU, in this application, an association relationship between the AP interface of the AP 206 and the STA interface of the AP 204 may be established. As shown in FIG. 5 , the AP interface of AP 206 is associated with STA 207 and AP 204 . During the first time period, the AP interface of the AP 206 sends the downlink data in the first data to be sent to the STA 207 and the AP 204 through OFDMA. Fig. 8 is a schematic diagram of the fourth structure of the WDS provided in this application. As shown in FIG. 8 , the WDS includes AP 204 , AP 206 and STA 207 . AP 206 allocates spectrum resources for STA 207 and AP 204 . For example, in FIG. 8 , AP 206 allocates one RU2 to AP 204 . AP 206 allocates another RU2 to STA 207 . During the target time period, the AP 206 sends the downlink data in the first data to be sent to the STA 207 and the AP 204 according to the allocated RU.

In practical applications, the data transfer between APs will seriously reduce the communication efficiency of WDS. Therefore, in the process of allocating RUs, the first AP may preferentially allocate RUs to the first AP. For the description of the RU allocation method, please refer to the related description in FIG. 7 .

According to the description of step 105 above, it can be known that the target AP can also obtain a free competition time period. The target AP transmits data within the target time period, and the first AP transmits data within the first time period. Therefore, the free contention period is mainly used for STAs to transmit backhaul data. For example, the first STA sends uplink data to the first AP, and the target STA sends uplink data to the target AP. In practical applications, in order to improve the flexibility of data transmission, the first AP and/or the target AP may also send data within the free contention time period.

For example, FIG. 9 is a fifth structural schematic diagram of the WDS provided in this application. As shown in FIG. 9 , the WDS includes AP 204 , AP 206 and STA 205 . During free time, STA 205 contends for one RU2. STA 205 sends uplink data to AP 204 through one RU2. AP 206 contends for one RU1. AP 206 sends uplink data to AP 204 through one RU1. The AP interface of AP 204 receives uplink data sent by STA 205 and AP 206 through OFDMA. Similarly, during the free period, the AP interface of the AP 206 can receive uplink data sent by the STA 207 and the AP 204 through OFDMA.

It should be understood that, in the wireless communication method shown in FIG. 1 , there is no strict timing limitation between step 104 and step 102 and step 103 . Step 104 may be before step 102 and after step 101 . Moreover, there is no strict timing relationship between step 107 and step 108 . Step 108 may be before step 107 and after step 106 .

In this application, the target AP allocates different time periods for the target AP and the first AP, so that the sending time of the target AP and the first AP can be staggered as much as possible. Therefore, the probability of collision between the first AP and the target AP can be reduced, thereby improving communication efficiency.

The wireless communication method in this application is described above, and the wireless communication device in this application is described below. Fig. 10 is a schematic diagram of the first structure of the wireless communication device provided in this application. As shown in FIG. 10 , the wireless communication device includes a receiving module 1001 , an acquiring module 1002 , a processing module 1003 , a first sending module 1004 and a second sending module 1005 . Wherein, the receiving module 1001 is used for receiving the first flow information from the first AP. The first flow information includes first queue size information of the first data to be sent of the first AP. The obtaining module 1002 is used for obtaining target flow information. The target traffic information includes target queue size information of target data to be sent by the wireless communication device. The processing module 1003 is configured to obtain the first time period and the target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The first sending module 1004 is configured to send information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent within the first time period. The second sending module 1005 is used for sending the target data to be sent within the target time period.

In other implementations, each module in the wireless communication device is further configured to perform all or part of the operations that can be performed by the target AP in the aforementioned wireless communication method. For example, the first sending module 1004 is also configured to execute the aforementioned step 102 in FIG. 1 . The second sending module 1005 is also configured to send the information of the free contention period to the target STA.

Fig. 11 is a second structural schematic diagram of the wireless communication device provided in this application. As shown in FIG. 11 , the wireless communication device includes a first sending module 1101 , a receiving module 1102 and a second sending module 1103 . The first sending module 1101 is configured to send first flow information to a target AP. The first flow information includes first queue size information of first data to be sent by the wireless communication device. The receiving module 1102 is configured to receive information of the first time period from the target AP. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target flow information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP is used to send the target data to be sent within the target time period. The second sending module 1103 is configured to send the first data to be sent within the first time period.

In other implementations, each module in the wireless communication device is further configured to perform all or part of the operations that can be performed by the first AP in the aforementioned wireless communication method. For example, the receiving module 1102 is also configured to receive the first request sent by the target AP. The receiving module 1102 is also configured to receive the information of the free contention period sent by the target AP. The first sending module 1101 is also configured to send the information of the free contention period to the first STA.

The wireless communication device in this application is described above, and the communication device in this application is described below. Fig. 12 is a schematic structural diagram of a communication device provided in this application. The communication device in this application may be the first AP or the target AP. As shown in FIG. 12 , a communication device 1200 includes a processor 1201 and a transceiver 1202 .

Wherein, the processor 1201 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The processor 1201 may further include a hardware chip or other general-purpose processors. The aforementioned hardware chip may be an application specific integrated circuit (application specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD) or a combination thereof. The transceiver 1202 may be a wireless radio frequency module.

When the communication device 1200 is the target AP, the transceiver 1202 is configured to receive first traffic information from the first AP. The first flow information includes first queue size information of the first data to be sent of the first AP. The processor 1201 is configured to acquire target traffic information. The target flow information includes target queue size information of target data to be sent by the target AP. The processor 1201 is further configured to obtain the first time period and the target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The transceiver 1202 is further configured to send information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent within the first time period. The transceiver 1202 is also used for sending the target data to be sent within the target time period.

When the communication device 1200 is the first AP, the transceiver 1202 is configured to send the first traffic information to the target AP. The first flow information includes first queue size information of the first data to be sent of the first AP. The transceiver 1202 is also used for receiving information of the first time period from the target AP. The processor 1201 is configured to read information of the first time period. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target flow information. The target flow information includes target queue size information of target data to be sent by the target AP. The target AP is used to send the target data to be sent within the target time period. The transceiver 1202 is also configured to send the first data to be sent within the first time period.

In other embodiments, the communication device 1200 further includes a memory 1203 . Memory 1203 may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), and the like. The volatile memory may be random access memory (Random Access Memory, RAM). Computer programs that can be executed by the processor 1201 are stored in the memory 1203 . When the processor 1201 reads and executes the computer program, it can perform all or part of the operations that can be performed by the target AP or the first AP in FIG. 1 or FIG. 7 .

The present application also provides a digital processing chip. The digital processing chip integrates circuits and one or more interfaces for realizing the functions of the processor 1201 described above. When the digital processing chip is integrated with a memory, the digital processing chip can complete the method steps in any one or more of the foregoing embodiments.

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application, and should cover Within the protection scope of this application.

Claims (25)

1. A wireless communication method, characterized in that, comprising: The target access point AP receives first flow information from the first AP, where the first flow information includes first queue size information of first data to be sent by the first AP; The target AP obtains target flow information, and the target flow information includes target queue size information of target data to be sent by the target AP; The target AP obtains a first time period and a target time period according to the first queue size information and the target queue size information, and the first time period is different from the target time period; The target AP sends the information of the first time period to the first AP, and the information of the first time period is used for the first AP to send the first to-be-sent message within the first time period. data; The target AP sends the target data to be sent within the target time period. 2. The method of claim 1, wherein, The AP interface of the target AP is associated with M target station STAs, and M is an integer greater than 0; The AP interface of the target AP is associated with the STA interface of the first AP; The sending of the target data to be sent by the target AP within the target time period includes: within the target time period, the AP interface of the target AP sends OFDMA to the M The target STA and the first AP send downlink data in the target data to be sent. 3. The method according to claim 1 or 2, wherein the STA interface of the target AP is associated with the AP interface of the first AP; The target AP sending the target data to be sent within the target time period includes: within the target time period, the target AP sends the target AP to the first AP through the STA interface of the target AP. Uplink data in the data to be sent by the target. 4. The method according to any one of claims 1 to 3, wherein the STA interface of the target AP is associated with the AP interface of the first AP; The method also includes: The target AP receives downlink data in the first data to be sent from the first AP through the STA interface of the target AP within the first time period. 5. The method according to any one of claims 1 to 4, wherein the AP interface of the target AP is associated with the STA interface of the first AP; The method also includes: The target AP receives the uplink data in the first data to be sent from the first AP through the AP interface of the target AP within the first time period. 6. according to the method described in any one in claim 1 to 5, it is characterized in that, described method also comprises: The target AP obtains a free competition time period according to the free competition time period, and the free competition time period is different from the first time period and the target time period. 7. The method according to claim 6, wherein the AP interface of the target AP is associated with M target STAs, M is an integer greater than 0, and the AP interface of the target AP is associated with the first AP's STA interface association; The method also includes: During the free competition period, the AP interface of the target AP receives the uplink data sent by the M target STAs and the first AP through OFDMA. 8. The method according to any one of claims 1 to 7, wherein the method further comprises: The target AP receives an activation frame from a control point AC; The target AP sends a first request to the first AP according to the activation frame, where the first request is used to request the first traffic information. 9. The method according to any one of claims 1 to 8, wherein the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y; Wherein, said Y is greater than said X. 10. A wireless communication method, comprising: The first access point AP sends first traffic information to the target AP, where the first traffic information includes first queue size information of first data to be sent by the first AP; The first AP receives information of a first time period from the target AP; Wherein, the first time period is different from the target time period, and the target time period and the first time period are obtained by the target AP according to the first queue size information and target flow information, and the target flow The information includes target queue size information of target data to be sent by the target AP, and the target AP is used to send the target data to be sent within the target time period; The first AP sends the first data to be sent within the first time period. 11. The method of claim 10, wherein, The AP interface of the first AP is associated with N first station STAs, where N is an integer greater than 0; The AP interface of the first AP is associated with the STA interface of the target AP; The first AP sending the first data to be sent within the first time period according to the information of the first time period includes: within the first time period, the AP interface of the first AP passes Orthogonal frequency division multiple access OFDMA sends the downlink data in the first data to be sent to the N first STAs and the target AP. 12. The method according to claim 10 or 11, wherein the STA interface of the first AP is associated with the AP interface of the target AP; The first AP sending the first to-be-sent data within the first time period according to the information of the first time period includes: within the first time period, the first AP passes the first time period An STA interface of an AP, sending the uplink data in the first data to be sent to the target AP. 13. The method according to any one of claims 10 to 12, wherein the STA interface of the first AP is associated with the AP interface of the target AP; The method also includes: The first AP receives downlink data in the target data to be sent from the target AP through the STA interface of the first AP within the target time period. 14. The method according to any one of claims 10-13, wherein the AP interface of the first AP is associated with the STA interface of the target AP. The method also includes: The first AP receives the uplink data in the target data to be sent from the target AP through the AP interface of the first AP within the target time period. 15. A method according to any one of claims 10 to 14, wherein The method also includes: The first AP receives information about a free competition time period from the target AP, and the free competition time period is different from the first time period and the target time period; The first AP competes to send uplink data to the target AP through the STA interface of the first AP within the free competition time period. 16. The method according to claim 15, wherein the AP interface of the first AP is associated with N first STAs, N is an integer greater than 0, and the AP interface of the first AP is associated with the target AP STA interface association; The method also includes: During the free competition period, the AP interface of the first AP receives uplink data sent by the N first STAs and the target AP through OFDMA. 17. A wireless distributed system WDS, characterized in that it comprises: A target access point AP and a first AP; The first AP is used to send first traffic information to the target AP, where the first traffic information includes first queue size information of first data to be sent by the first AP; The target AP is used to obtain target traffic information, and the target traffic information includes target queue size information of target data to be sent by the target AP; The target AP is used to obtain a first time period and a target time period according to the first queue size information and the target queue size information, and the first time period is different from the target time period; The target AP is used to send the information of the first time period to the first AP; The first AP is used to send the first data to be sent within the first time period; The target AP is used to send the target data to be sent within the target time period. 18. The system of claim 17, wherein: The AP interface of the target AP is associated with M target station STAs, and M is an integer greater than 0; The AP interface of the target AP is associated with the STA interface of the first AP; The target AP being used to send the target data to be sent within the target time period includes: within the target time period, the AP interface of the target AP transmits to the target AP through OFDMA The M target STAs and the first AP send downlink data in the target data to be sent. 19. The system according to claim 17 or 18, wherein the AP interface of the first AP is associated with the STA interface of the target AP, and the AP interface of the first AP is associated with N first STA interfaces Association, N is an integer greater than 0; The first AP being used to send the first data to be sent within the first time period includes: the first AP being used to send the N first STAs to the N first STAs through OFDMA within the first time period Send the downlink data in the first data to be sent with the target AP. 20. A system according to any one of claims 17 to 19, wherein The target AP is also used to obtain a free competition time period according to the free competition time period, and the free competition time period is different from the first time period and the target time period; 21. The system according to claim 20, wherein the AP interface of the target AP is associated with M target STAs, and M is an integer greater than 0; During the free competition period, the AP interface of the target AP receives data sent by the M target STAs and the first AP through OFDMA. 22. A wireless communication device, comprising: A receiving module, configured to receive first flow information from a first AP, where the first flow information includes first queue size information of first data to be sent by the first AP; An acquisition module, configured to acquire target traffic information, where the target traffic information includes target queue size information of target data to be sent by the wireless communication device; A processing module, configured to obtain a first time period and a target time period according to the first queue size information and the target queue size information, where the first time period is different from the target time period; A first sending module, configured to send information of the first time period to the first AP, where the information of the first time period is used by the first AP to send the first time period within the first time period Data to be sent; The second sending module is configured to send the target data to be sent within the target time period. 23. The device of claim 22, wherein: The AP interface of the wireless communication device is associated with M target stations STA, and M is an integer greater than 0; The AP interface of the wireless communication device is associated with the STA interface of the first AP; The second sending module is specifically configured to send the target data to be sent to the M target STAs and the first AP through Orthogonal Frequency Division Multiple Access (OFDMA) within the target time period. downlink data. 24. A wireless communication device, comprising: A first sending module, configured to send first traffic information to a target AP, where the first traffic information includes first queue size information of first data to be sent by the wireless communication device; A receiving module, configured to receive information of the first time period from the target AP; Wherein, the first time period is different from the target time period, and the target time period and the first time period are obtained by the target AP according to the first queue size information and target flow information, and the target flow The information includes target queue size information of target data to be sent by the target AP, and the target AP is used to send the target data to be sent within the target time period; A second sending module, configured to send the first data to be sent within the first time period. 25. The device of claim 24, wherein: The AP interface of the wireless communication device is associated with N first station STAs, where N is an integer greater than 0; The AP interface of the wireless communication device is associated with the STA interface of the target AP; The second sending module is specifically configured to send the first data to be sent to the N first STAs and the target AP through Orthogonal Frequency Division Multiple Access (OFDMA) within the first time period. downlink data.

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