CN110139365B - Method and device for transmitting data in inactive state and user equipment - Google Patents

Abstract

The present invention provides a method, device and user equipment for transmitting data in an inactive state. The method includes: after sending a random access preamble to the base station and receiving a random access response returned by the base station, sending MSG3 to the base station; receiving MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, the MSG4 Carry resource allocation information in the resource allocation information, and the resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources; use the Grant Free resources or UL Grant resources to send data to the base station. The present invention can ensure the data transmission in the inactive state under the condition of rational utilization of resources.

Description

Method, device and user equipment for transmitting data in inactive state

technical field

The present invention relates to the technical field of wireless communication, and in particular, to a method, apparatus and user equipment for transmitting data in an inactive state.

Background technique

With the development of wireless communication technology, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) introduced NR (New Radio, new air interface) technology. In NR, RRC (Radio Resource Control, radio resource control) supports three states: RRC_IDLE (idle state), RRC_INACTIVE (inactive state), and RRC_CONNECTED (connected state). In the RRC_INACTIVE state, the UE is still CM-CONNECTED and can move within the RNA (RAN-based Notification Area, radio access network-based notification area) configured by the base station without notifying the base station. And the last serving base station maintains the context of the UE and the NG connection related to the UE (the connection between the base station and the AMF/UPF). The AMF provides assistance information to the base station to assist the base station to decide whether the UE can enter RRC_INACTIVE. When the UE in the RRC_INACTIVE state moves out of the configured RNA, the UE triggers the RNA update procedure.

When the UE wants to send data, one way is that the UE first enters the RRC_CONNECTED state, and then performs data transmission. This method is more suitable when the amount of data is large. However, if the UE needs to send a small amount of data, this method has some disadvantages, for example, the signaling overhead is relatively large.

Currently, how the UE sends uplink data in the INACTIVE state is an issue under discussion. For sending uplink data in the INACTIVE state, some companies have proposed several methods.

One way is for the UE to carry small uplink data in MSG3. However, the data size of MSG3 (determined by the uplink grant of the base station in the RAR) is very limited and may not be able to accommodate the data to be sent. In addition, the base station cannot know in advance how much grant the UE needs, and if a larger grant is always allocated, resources will be wasted.

Another method is to use grant free resources for the UE in the INACTIVE state in advance (that is, it is not necessary to allocate resources for uplink transmission through downlink control signaling), and the resources are pre-allocated in the CONNECTED state. However, since the UE may move and the UE cannot know its uplink advance TA (Timing Advance) when it is in an idle state, the previously allocated resources may not be available.

SUMMARY OF THE INVENTION

The method, device and user equipment for data transmission in an inactive state provided by the present invention can ensure data transmission in an inactive state under the condition of rational utilization of resources.

In a first aspect, the present invention provides a method for transmitting data in an inactive state, comprising:

After sending the random access preamble to the base station and receiving the random access response returned by the base station, send MSG3 to the base station;

Receiving MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, the MSG4 carries resource allocation information, and the resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources;

Send data to the base station using the Grant Free resource or the UL Grant resource.

Optionally, the MSG3 carries an INACTIVE transmission data flag, and the base station determines that the UE can send data in the INACTIVE state according to the INACTIVE transmission data flag.

Optionally, the MSG3 carries the amount of data to be transmitted, and when the amount of data to be transmitted is less than a preset threshold, the base station determines that the UE can send data in the INACTIVE state; or, the MSG3 also carries trigger data. The transmitted DRB ID, when the QoS of the DRB that triggers transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.

Optionally, the MSG4 also carries an indication that the UE is still in the INACTIVE state.

Optionally, before the sending MSG3 to the base station, the method further includes:

Receive the data volume threshold, delay requirement threshold or data priority threshold configured by the base station;

Whether to send data in the INACTIVE state is judged according to the data volume threshold, the delay requirement value threshold or the data priority threshold.

Optionally, judging whether to send data in the INACTIVE state according to the data volume threshold, delay requirement threshold or data priority threshold includes:

When the amount of data to be sent is less than the data amount threshold, it is determined that the data is to be sent in the INACTIVE state; or,

When the delay value of the data to be sent is lower than the delay requirement threshold, it is determined that the data is sent in the INACTIVE state; or,

When the priority of the data to be sent is higher than the data priority threshold, it is determined that the data is sent in the INACTIVE state.

Optionally, the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the implicit data size.

Optionally, the MSG3 also carries a BSR; the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the BSR.

Optionally, the MSG4 is RRC release signaling or RRC recovery rejection signaling.

Optionally, when the resource corresponding to the resource allocation information is a Grant Free resource, the using the Grant Free resource to send data to the base station includes: using the Grant Free resource to send data to the base station within a predetermined time period, the predetermined time period. The segment is configured by the base station in MSG4, or is a period of time before the uplink timing advance timer expires.

Optionally, the method further includes: releasing the Grant Free resource after data transmission is completed using the Grant Free resource.

In a second aspect, the present invention provides a device for transmitting data in an inactive state, comprising:

a first sending unit, configured to send MSG3 to the base station after sending a random access preamble to the base station and receiving a random access response returned by the base station;

a first receiving unit, configured to receive an MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, where the MSG4 carries resource allocation information, and the resource corresponding to the resource allocation information is Grant Free resources or UL Grant resources;

The second sending unit is configured to send data to the base station by using the Grant Free resource or the UL Grant resource.

Optionally, the MSG3 carries an INACTIVE transmission data flag, and the base station determines that the UE can send data in the INACTIVE state according to the INACTIVE transmission data flag.

Optionally, the MSG3 carries the amount of data to be transmitted, and when the amount of data to be transmitted is less than a preset threshold, the base station determines that the UE can send data in the INACTIVE state; or, the MSG3 also carries trigger data. The transmitted DRB ID, when the QoS of the DRB that triggers transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.

Optionally, the MSG4 also carries an indication that the UE is still in the INACTIVE state.

Optionally, the device further includes:

a second receiving unit, configured to receive the data volume threshold, delay requirement threshold or data priority threshold configured by the base station before the first sending unit sends MSG3 to the base station;

A judging unit, configured to judge whether to send data in the INACTIVE state according to the data volume threshold, the delay requirement value threshold or the data priority threshold.

Optionally, the judging unit is configured to judge that the data is to be sent in the INACTIVE state when the amount of data to be sent is less than the data amount threshold; or, when the delay value of the data to be sent is lower than the delay requirement When the value threshold is reached, it is judged that the data is sent in the INACTIVE state; or, when the priority of the data to be sent is higher than the data priority threshold, it is judged that the data is sent in the INACTIVE state.

Optionally, the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the implicit data size.

Optionally, the MSG3 also carries a BSR; the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the BSR.

Optionally, the MSG4 is RRC release signaling or RRC recovery rejection signaling.

Optionally, when the resource corresponding to the resource allocation information is a Grant Free resource, the second sending unit is configured to use the Grant Free resource to send data to the base station within a predetermined time period, where the predetermined time period is: The base station is configured in MSG4, or is a period of time within which the uplink timing advance timer does not expire.

Optionally, the device further includes:

A releasing unit, configured to release the Grant Free resource after the second sending unit completes data transmission by using the Grant Free resource.

In a third aspect, the present invention provides a user equipment, where the user equipment includes the above-mentioned apparatus for transmitting data in an inactive state.

In the method, device, and user equipment for data transmission in an inactive state provided by the embodiments of the present invention, the UE sends MSG3 to the base station, and after the base station determines that the UE can send data in the INACTIVE state, it sends MSG4 to the UE, where the MSG4 carries Resource allocation information, the resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources, and the UE uses the Grant Free resources or UL Grant resources to send data to the base station, so as to ensure the inactive state under the condition of rational use of resources data transfer under.

Description of drawings

1 is a flowchart of a method for transmitting data in an inactive state according to an embodiment of the present invention;

2 is a flowchart of a method for transmitting data in an inactive state according to another embodiment of the present invention;

3 is a flowchart of a method for transmitting data in an inactive state according to another embodiment of the present invention;

4 is a schematic structural diagram of an apparatus for transmitting data in an inactive state according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for transmitting data in an inactive state according to another embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

An embodiment of the present invention provides a method for transmitting data in an inactive state, as shown in FIG. 1 , the method includes:

S11. After sending a random access preamble (ie Preamble) to the base station and receiving a random access response returned by the base station, the UE sends MSG3 to the base station.

The UE is in an inactive state before step S11.

S12. The UE receives the MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, where the MSG4 carries resource allocation information, and the resource corresponding to the resource allocation information is Grant Free resources or UL Grant resources.

Wherein, the MSG4 may be RRC release signaling or RRC recovery rejection signaling.

S13. The UE sends data to the base station by using the Grant Free resource or the UL Grant resource.

In the method for data transmission in an inactive state provided by the embodiment of the present invention, the UE sends MSG3 to the base station, and after the base station determines that the UE can send data in the INACTIVE state, it sends MSG4 to the UE, where the MSG4 carries resource allocation information, so the base station sends MSG4 to the UE. The resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources (uplink grant resources), and the UE uses the Grant Free resources or UL Grant resources to send data to the base station, so that the inactive state can be guaranteed under the condition of rational utilization of resources data transfer under.

The method for transmitting data in an inactive state of the present invention will be described in detail below with reference to specific embodiments.

Example 1

This embodiment provides a method for transmitting data in an inactive state, as shown in FIG. 2 , the method includes:

S21. The UE performs random access in the RRC_INACTIVE state, and sends a random access preamble to the base station (gNB).

S22. After receiving the random access preamble sent by the UE, the base station sends a random access response to the UE.

S23. The UE sends MSG3 (RRC message) to the base station according to the resource allocation information in the random access response, wherein the MSG3 carries the INACTIVE transmission data flag, which is used to indicate that the purpose of the current request is to perform data transmission in the INACTIVE state.

In addition to the flag indicating data transmission in INACTIVE, the UE may also include a BSR (BufferStatus Report, buffer status report) in MSG3, so as to let the base station know the size of the data to be sent by the UE. Sometimes because the number of bits of the BSR is relatively large, the MSG3 may not include the BSR. At this time, the base station allocates resources to the UE according to an implicit data amount.

The base station can set some parameters for the UE in advance, so that the UE can judge whether to transmit data in INACTIVE. The base station can configure these parameters before triggering the UE to enter the inactive state. The parameters include: a data volume threshold. When the data volume is greater than or equal to this threshold, it is considered to be in the connected state for data transmission; otherwise, data transmission can be performed in the INACTIVE state. The parameters may also include: delay requirement threshold, when the delay value of the transmitted data is lower than the threshold, that is, the data should be sent as soon as possible, and the amount of data to be sent is less than a certain value, the UE considers that it can be sent in the INACTIVE state; otherwise, the connection state for data transmission. The parameters may also include: data priority threshold. When the priority of the data to be sent is higher than this threshold, the UE considers that it should be sent first, and the amount of data to be sent is less than a certain value, and can be sent in the INACTIVE state; otherwise, the data is sent to the connected state. transmission.

S24. After receiving the MSG3 sent by the UE, the base station can know that the UE does not need to enter the CONNECTED state but transmits data in the INACTIVE state according to the INACTIVE transmission data flag carried in the MSG3, and sends MSG4 to the UE to allocate resources to the UE.

The base station can allocate Grant Free resources to the UE, and can also allocate normal UL Grant resources. The base station can determine the size of the allocated resources with reference to the BSR of the UE, or allocate resources according to the implicit data amount. The base station carries the resource allocation information in MSG4, and indicates that the UE is still in the INACTIVE state, that is, the INACTIVE state is maintained.

In addition, the base station may also ignore the flag that the UE sends data in INACTIVE. At this time, the base station performs the connection recovery process through MSG4, and performs data transmission after the connection is recovered. The base station can take corresponding measures according to its own scheduling decision.

S25: After receiving the MSG4 sent by the base station, the UE uses the resources allocated by the base station in the MSG4 to send data.

If it is a Grant Free resource, the UE uses the Grant Free resource to send data to the base station within a predetermined time period, where the predetermined time period is configured by the base station in MSG4, or is a period in which the uplink timing advance timer does not expire time. If it is a normal UL Grant resource, it will be used once at the specified time according to the allocation information.

Further, after the UE completes data transmission using the Grant Free resources, the UE releases the Grant Free resources. At this time, the period of time set by the base station may not be reached, and releasing resources in advance can make the resources used by other UEs and reduce conflicts.

Later, the UE can still request to restore the connection through MSG3 of the random access process, and enter CONNECTED to transmit data, such as a scenario where a large amount of data is to be sent later.

Example 2

This embodiment provides a method for transmitting data in an inactive state, as shown in FIG. 3 , the method includes:

S31. The UE performs random access in the RRC_INACTIVE state, and sends a random access preamble to the base station (gNB).

S32: After receiving the random access preamble sent by the UE, the base station sends a random access response to the UE.

S33: The UE sends MSG3 (RRC message) to the base station, wherein the MSG3 carries some auxiliary information.

The auxiliary information may include the amount of data to be transmitted, and may also include a DRB ID (Data Radio Bearer Identity, data radio bearer identity) that triggers data transmission.

S34. After receiving the MSG3 sent by the UE, the base station determines whether to transmit data in INACTIVE according to the auxiliary information carried in MSG3, and after determining that the UE can transmit data in INACTIVE, sends MSG4 to the UE to allocate resources to the UE.

Specifically, when the base station judges that the amount of data to be transmitted is less than a threshold, the data is transmitted in INACTIVE; or, when the base station judges that the QoS (Quality of Service) of the DRB that triggers transmission has a very low delay value or a high value priority (the total amount of data is still required to be lower than a threshold at this time), then the data is transmitted in INACTIVE.

When the base station determines that data is to be sent under INACTIVE according to the above method, it allocates resources to the UE in MSG4. The base station can allocate Grant Free resources to the UE, and can also allocate normal UL Grant resources. The base station can determine the size of the allocated resources with reference to the BSR of the UE. The base station carries resource allocation information in MSG4 and indicates that the UE is still in the INACTIVE state. In addition, the base station may also ignore the information carried by the UE in the MSG3. At this time, the base station performs the connection recovery process through the MSG4, and performs data transmission after the connection is recovered.

S35: After receiving the MSG4 sent by the base station, the UE uses the resources allocated by the base station in the MSG4 to send data.

If it is a Grant Free resource, the UE uses the Grant Free resource to send data to the base station within a predetermined time period, where the predetermined time period is configured by the base station in MSG4, or is a period in which the uplink timing advance timer does not expire time. If it is a normal UL Grant resource, it will be used once at the specified time according to the allocation information.

Further, after the UE completes data transmission using the Grant Free resources, the UE releases the Grant Free resources.

An embodiment of the present invention further provides an apparatus for transmitting data in an inactive state. As shown in FIG. 4 , the apparatus includes:

The first sending unit 11 is configured to send MSG3 to the base station after sending the random access preamble to the base station and receiving the random access response returned by the base station;

The first receiving unit 12 is configured to receive the MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, the MSG4 carries resource allocation information, and the resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources ;

The second sending unit 13 is configured to send data to the base station by using the Grant Free resource or the UL Grant resource.

In the device for transmitting data in an inactive state provided by the embodiment of the present invention, the UE sends MSG3 to the base station, and after the base station determines that the UE can send data in the INACTIVE state, it sends MSG4 to the UE, where the MSG4 carries resource allocation information, so The resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources, and the UE uses the Grant Free resources or UL Grant resources to send data to the base station, so as to ensure data transmission in an inactive state while utilizing resources reasonably.

Optionally, the MSG3 carries an INACTIVE transmission data flag, and the base station determines that the UE can send data in the INACTIVE state according to the INACTIVE transmission data flag.

Optionally, the MSG3 carries the amount of data to be transmitted, and when the amount of data to be transmitted is less than a preset threshold, the base station determines that the UE can send data in the INACTIVE state; or, the MSG3 also carries trigger data. The transmitted DRB ID, when the QoS of the DRB that triggers transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.

Optionally, the MSG4 also carries an indication that the UE is still in the INACTIVE state.

Optionally, as shown in Figure 5, the device further includes:

The second receiving unit 14 is configured to, before the first sending unit 11 sends the MSG3 to the base station, receive the data volume threshold, the delay requirement value threshold or the data priority threshold configured by the base station;

The judging unit 15 is configured to judge whether to send data in the INACTIVE state according to the data volume threshold, the delay requirement value threshold or the data priority threshold.

Optionally, the judging unit 15 is configured to judge that the data is to be sent in the INACTIVE state when the amount of data to be sent is less than the data amount threshold; or, when the delay value of the data to be sent is lower than the delay When the value threshold is required, it is judged to send data in the INACTIVE state; or, when the priority of the data to be sent is higher than the data priority threshold, it is judged to send the data in the INACTIVE state.

Optionally, the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the implicit data size.

Optionally, the MSG3 also carries a BSR; the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the BSR.

Optionally, the MSG4 is RRC release signaling or RRC recovery rejection signaling.

Optionally, when the resource corresponding to the resource allocation information is a Grant Free resource, the second sending unit 13 is configured to use the Grant Free resource to send data to the base station within a predetermined time period, the predetermined time period. For the base station configured in MSG4, or for a period of time when the uplink timing advance timer does not expire.

Optionally, as shown in Figure 5, the device further includes:

The releasing unit 16 is configured to release the Grant Free resource after the second sending unit 13 completes data transmission by using the Grant Free resource.

The apparatus of this embodiment can be used to implement the technical solutions of the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

An embodiment of the present invention further provides a user equipment, where the user equipment includes the above-mentioned apparatus for transmitting data in an inactive state.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. During execution, the processes of the embodiments of the above-mentioned methods may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM) or the like.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (21)

1. a method for transmitting data under inactive state, is characterized in that, comprises: After sending the random access preamble to the base station and receiving the random access response returned by the base station, send MSG3 to the base station; Receiving the MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, the MSG4 carries resource allocation information, the resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources, and the MSG4 is the RRC release signal. order or RRC to resume reject signaling; Send data to the base station using the Grant Free resource or the UL Grant resource. 2 . The method according to claim 1 , wherein the MSG3 carries an INACTIVE transmission data flag, and the base station determines that the UE can send data in the INACTIVE state according to the INACTIVE transmission data flag. 3 . 3. The method according to claim 1, wherein the MSG3 carries the amount of data to be transmitted, and when the amount of data to be transmitted is less than a preset threshold, the base station determines that the UE can send data in an INACTIVE state Or, the DRB ID that triggers data transmission is also carried in the MSG3, and when the QoS of the DRB that triggers transmission has a very low delay value or a higher priority, the base station determines that the UE can send data in the INACTIVE state . The method according to claim 2 or 3, wherein the MSG4 further carries an indication that the UE is still in the INACTIVE state. 5. The method according to claim 1, wherein before the sending MSG3 to the base station, the method further comprises: Receive the data volume threshold, delay requirement threshold or data priority threshold configured by the base station; Whether to send data in the INACTIVE state is judged according to the data volume threshold, the delay requirement value threshold or the data priority threshold. 6. The method according to claim 5, wherein the judging whether to send data in the INACTIVE state according to the data volume threshold, the time delay requirement threshold or the data priority threshold comprises: When the amount of data to be sent is less than the data amount threshold, it is determined that the data is to be sent in the INACTIVE state; or, When the delay value of the data to be sent is lower than the delay requirement threshold, it is determined that the data is sent in the INACTIVE state; or, When the priority of the data to be sent is higher than the data priority threshold, it is determined that the data is sent in the INACTIVE state. 7 . The method according to claim 1 , wherein the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the implicit data amount. 8 . The method according to claim 1, wherein the MSG3 further carries a BSR; and the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the BSR. 9 . The method according to claim 1 , wherein when the resource corresponding to the resource allocation information is a Grant Free resource, the sending data to the base station using the Grant Free resource comprises: using the Grant within a predetermined period of time. 10 . The Free resource sends data to the base station, and the predetermined time period is configured by the base station in MSG4, or is a period of time within which the uplink timing advance timer does not expire. 10. The method according to claim 1 or 9, wherein the method further comprises: releasing the Grant Free resource after completing the data transmission using the Grant Free resource. 11. A device for transmitting data in an inactive state, comprising: a first sending unit, configured to send MSG3 to the base station after sending a random access preamble to the base station and receiving a random access response returned by the base station; a first receiving unit, configured to receive an MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, where the MSG4 carries resource allocation information, and the resource corresponding to the resource allocation information is Grant Free resources or UL Grant resources, The MSG4 is RRC release signaling or RRC recovery rejection signaling; The second sending unit is configured to send data to the base station by using the Grant Free resource or the UL Grant resource. 12 . The apparatus according to claim 11 , wherein the MSG3 carries an INACTIVE transmission data flag, and the base station determines that the UE can send data in the INACTIVE state according to the INACTIVE transmission data flag. 13 . 13. The apparatus according to claim 11, wherein the MSG3 carries the amount of data to be transmitted, and when the amount of data to be transmitted is less than a preset threshold, the base station determines that the UE can send data in an INACTIVE state Or, the DRB ID that triggers data transmission is also carried in the MSG3, and when the QoS of the DRB that triggers transmission has a very low delay value or a higher priority, the base station determines that the UE can send data in the INACTIVE state . The apparatus according to claim 12 or 13, wherein the MSG4 further carries an indication that the UE is still in the INACTIVE state. 15. The apparatus of claim 11, wherein the apparatus further comprises: a second receiving unit, configured to receive the data volume threshold, delay requirement threshold or data priority threshold configured by the base station before the first sending unit sends MSG3 to the base station; A judging unit, configured to judge whether to send data in the INACTIVE state according to the data volume threshold, the delay requirement value threshold or the data priority threshold. 16. The apparatus according to claim 15, wherein the judging unit is used to judge that the data to be sent is to be sent in an INACTIVE state when the amount of data to be sent is less than the data amount threshold; or, when the data to be sent is When the delay value is lower than the delay requirement threshold, it is judged to send data in the INACTIVE state; or, when the priority of the data to be sent is higher than the data priority threshold, it is judged to send the data in the INACTIVE state. 17 . The apparatus according to claim 11 , wherein the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the implicit data amount. 18 . The apparatus according to claim 11, wherein the MSG3 further carries a BSR; and the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to the BSR. 19. The apparatus according to claim 11, wherein when the resource corresponding to the resource allocation information is a Grant Free resource, the second sending unit is configured to use the Grant Free resource within a predetermined time period Send data to the base station, where the predetermined time period is configured by the base station in MSG4, or is a period of time within which the uplink timing advance timer does not expire. 20. The device according to claim 11 or 19, wherein the device further comprises: A releasing unit, configured to release the Grant Free resource after the second sending unit completes data transmission by using the Grant Free resource. 21. A user equipment, characterized in that the user equipment comprises the apparatus for transmitting data in an inactive state according to any one of claims 11 to 20.

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