CN103428732B - Routing optimization method and system, wireless side network element - Google Patents

Abstract

The invention discloses a route optimization method, comprising: a wireless side network element performs route optimization judgment according to acquired route optimization judgment information, and executes establishment of a route optimization channel when it is judged that route optimization can be performed. The invention also discloses a routing optimization system and a wireless side network element. The technical scheme of the invention can reduce the time delay of data transmission and reduce the network burden of the core network.

Description

Routing optimization method and system, wireless side network element

technical field

The present invention relates to routing optimization technology, in particular to a routing optimization method and system, and a wireless side network element.

Background technique

In order to maintain the competitiveness of the third-generation mobile communication system in the communication field, provide users with faster rate, lower delay, and more personalized mobile communication services, and at the same time, in order to reduce the operating costs of operators, the third-generation cooperation The standard working group of the Partnership Project (3GPP, 3rd Generation Partnership Project) is working on the research of the Evolved Packet System (EPS, Evolved Packet System). Fig. 1 is a schematic structural diagram of an evolved packet domain system. As shown in Fig. 1, the entire EPS system is divided into two parts: a radio access network and a core network. The core network includes Home Subscriber Server (HSS, HomeSubscriber Server), Mobility Management Entity (MME, Mobility Management Entity), Serving GPRS Support Node (SGSN, Serving GPRS Support Node), Policy and Charging Rule Function (PCRF, Policy and Charging Rule Function ), a serving gateway (S-GW, Serving Gateway), a packet data gateway (P-GW, PDNGateway) and a packet data network (PDN, Packet Data Network). The related functions of each network element are described in detail below.

The home user server is the permanent storage place of the user subscription data, and is located in the home network of the user subscription.

The mobility management entity is the storage location of user subscription data in the current network, responsible for terminal-to-network non-access layer signaling management, terminal security verification function, terminal mobility management, user tracking and paging in idle mode Administrative functions and bearer management.

Serving GPRS support node, is the Global System for Mobile Communications (GSM, Global System for Mobile Communications) Enhanced Data Rate GSM Evolution (EDGE, Enhanced Data Rate for GSMEvolution) Radio Access Network (GERAN, GSM EDGE Radio Access Network) and Universal Mobile Communications System (UMTS, Universal Mobile Telecommunications System) Terrestrial Radio Access Network (UTRAN, UMTSTerrestrial Radio Access Network) service support point for users to access the core network. Functionally similar to the mobility management entity, it is responsible for user location update, paging management and Bearer management and other functions.

The service gateway is the gateway from the core network to the wireless system, responsible for the user plane bearer from the terminal to the core network, data caching in the terminal idle mode, the function of initiating service requests on the network side, legal interception, and packet data routing and forwarding functions; the service gateway Responsible for making statistics on the use of wireless networks by user terminals, and generating bills of wireless network use by terminals, and sending them to the billing gateway.

The packet data gateway is the gateway of the evolution system and the system's external packet data network, which is connected to the Internet and the packet data network, and is responsible for the Internet Protocol (IP, Internet Protocol) address allocation, billing function, packet filtering, and Policy control and other functions.

The packet data network is the operator's IP service network, which provides IP services to users through the operator's core network.

The policy charging rule functional entity is a server responsible for providing charging control, online credit control, threshold control, and quality of service (QoS, Quality of Service) policy rules in the evolved system.

The radio access network is composed of an evolved base station (eNB, Evolved NodeB) and a 3G radio network controller (RNC, Radio Network Controller). resources, resource scheduling, and access control.

The above serving GPRS support node is an upgraded SGSN, which can support the S4 interface with the serving gateway, and communicate with the mobility management unit using GPRS Tunneling Protocol version 2 (GTPv2, GPRS Tunneling Protocol version 2). However, for the SGSN supporting the 3G core network, the packet switching (PS, Packet Switching) domain network architecture is different from that shown in FIG. 1 . At this time, the SGSN and the MME are connected through the Gn interface, and the intercommunication adopts the GPRS Tunneling Protocol version 1 (GTPv1, GPRS Tunneling Protocol version 1). The SGSN cannot be connected with the service gateway, and is connected to the gateway GPRS support node (GGSN, Gateway GPRS Support Node) through the Gn interface to directly access the packet data network.

When a user accesses a service, the terminal will initiate a packet data network (PDN, Packet Data Network) connection establishment process. The MME/SGSN selects the core network service gateway and the anchor gateway according to the APN reported by the terminal corresponding to the service used by the user, and establishes a slave terminal - A user plane channel between a wireless base station and a core network gateway (serving gateway and anchor gateway). Users access external/internal network services through the anchor gateway. When the user moves within the service area of the anchor gateway, the service will not be interrupted. Figure 2 is a schematic diagram of the user plane path for the user terminal to receive/send data. As shown in Figure 2, path 1 indicates that the user accesses the external Internet network, and path 2 indicates that the user communicates with users belonging to the same service gateway service area.

It can be seen from Fig. 2 that the data received/sent by the user terminal will pass through the core network anchor gateway, even if the two users communicating with each other are located under the same base station. This data transmission mode is not optimized enough, which increases the delay of user data transmission and reduces the resource utilization rate of the core network. Especially after the popularization and development of device-to-device (D2D, Device to Device) services, the bottleneck in routing will become more prominent.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a route optimization method and system, and a network element on the wireless side, which can realize route optimization according to the access status of both communicating parties.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A routing optimization method, comprising:

The network element at the wireless side executes the route optimization judgment according to the acquired route optimization judgment information, and executes the establishment of the route optimization channel when it is judged that the route optimization can be performed.

Wherein, the route optimization decision information includes route optimization subscription information and/or route optimization strategy, and communication party address information.

Wherein, the determination that route optimization can be performed is:

The routing optimization subscription information and/or routing optimization strategies of both communication parties allow route optimization, and the communication parties are located in the same wireless side network element, and it is determined that the communication parties can perform route optimization.

Wherein, the acquired route optimization subscription information and/or route optimization strategy are:

The mobility management unit sends the route-optimized subscription information and/or route-optimized policy information received from the subscription data server to the wireless side network element when creating the session;

Or, the configuration network element in the network configures the communication party's route-optimized subscription information and/or route-optimized policy information as configuration information to the wireless-side network element;

Or, during the process of creating or modifying the IP-CAN, IP-Connectivity Access Network (IP-CAN, IP-Connectivity Access Network) session initiated by the core network gateway and the Policy and Charging Rules Functional Entity (PCRF, Policy and ChargingRules Function), obtain from the PCRF The communication party's route-optimized subscription information and/or route-optimized policy information are forwarded to the mobility management unit; the mobility management unit sends the route-optimized subscription information and/or route-optimized policy information to the The network element on the wireless side;

Or, when the PCRF actively initiates bearer establishment or bearer modification, it sends the communication party's route optimization subscription information and/or route optimization policy information to the core network gateway; the core network gateway sends the route optimization The subscription information and/or route optimization policy information are forwarded to the wireless side network element.

Wherein, the obtained communication party address information is:

PCRF specifies the IP-CAN session or the transport flow template TFT used in the IP-CAN session initiated by the core network gateway or during the modification process, and notifies the core network gateway; the core network gateway uses the TFT Forwarding to the wireless side network element through the core network mobility management unit; the wireless side network element obtains the IP address of the attached communication party from the TFT;

Or, when the PCRF actively initiates bearer establishment or bearer modification, it will notify the mobility management unit of the TFT used by the IP-CAN session or bearer specified in the IP-CAN session creation or modification process; the mobility management unit will The TFT is forwarded to the wireless side network element; the wireless side network element obtains the IP address of the attached communication party from the TFT;

Or, the network element on the wireless side parses out the IP address of the attached communication party from the header of the received data packet;

Or, after the anchor point gateway acquires the IP address of the attached communication party through the IP address assignment process or monitoring the dynamic host configuration protocol DHCP message process, it notifies the mobility management unit; the mobility management unit sends the IP address of the attached communication party The address is sent to the wireless side network element.

Wherein, the communication parties share one wireless side network element.

Wherein, the establishment of the execution routing optimization channel is:

The communication parties establish a routing channel through the wireless side network element without passing through the core network.

Wherein, the establishment of the execution routing optimization channel is:

When the network element on the radio side determines that the data needs local routing, it matches the data to the corresponding radio bearer according to the TFT, and sends the data to the communicating party.

Wherein, the establishment of the execution routing optimization channel is:

PCRF establishes a dedicated bearer for both communication parties or designates a certain bearer for the transmission of route optimization data of both communication parties;

When the network element on the wireless side determines that the data needs local routing, it matches the data that can perform route optimization to a dedicated bearer or a designated bearer, and matches the data that cannot perform route optimization to the corresponding bearer of the core network; or all data are matched to a dedicated bearer/designated bearer.

Wherein, the wireless side network element includes: an evolved base station, a base station controller, a home base station, a home evolved base station, and a home base station gateway.

A network element on the wireless side, including an acquisition unit, a determination unit, and an execution unit, wherein:

an acquisition unit, configured to acquire routing optimization decision information;

A determination unit, configured to execute a route optimization determination according to the route optimization determination information, and trigger an execution unit when it is determined that route optimization can be performed;

The execution unit is configured to execute the establishment of the routing optimization channel.

Wherein, the route optimization decision information includes route optimization subscription information and/or route optimization strategy, and communication party address information.

Wherein, the judging unit is further configured to determine that the routing optimization subscription information and/or routing optimization strategies of both communication parties allow route optimization, and when both communication parties are located in the same wireless side network element, it is determined that the The communication parties can perform route optimization.

A routing optimization system, including a serving gateway, a mobility management unit, a PCRF, a subscription data server, a wireless side network element, and a communication party, wherein the wireless side network element is used to perform routing according to the obtained routing optimization decision information Optimization determination, and when it is determined that route optimization can be performed, establish a route optimization channel.

Wherein, the route optimization decision information includes route optimization subscription information and/or route optimization strategy, and communication party address information.

Wherein, the wireless side network element is further configured to determine that both the communication parties' route optimization subscription information and/or route optimization strategies allow route optimization, and when the two communication parties are located in the same wireless side network element, determine Routing optimization can be performed for the communication parties.

Wherein, the route optimization subscription information and/or route optimization strategy obtained by the network element on the wireless side is:

The mobility management unit sends the route-optimized subscription information and/or route-optimized policy information received from the subscription data server to the wireless side network element when creating the session;

Or, the configuration network element in the network configures the communication party's route-optimized subscription information and/or route-optimized policy information as configuration information to the wireless-side network element;

Or, the core network gateway initiates an IP connection with the policy and charging rule functional entity PCRF to access the network IP-CAN session creation or modification process, and acquires the communication party's route optimization subscription information and/or route optimization strategy from the PCRF information, and forward it to a mobility management unit; the mobility management unit sends the route-optimized subscription information and/or route-optimized policy information to the wireless side network element;

Or, when the PCRF actively initiates bearer establishment or bearer modification, it sends the communication party's route optimization subscription information and/or route optimization policy information to the core network gateway; the core network gateway sends the route optimization The subscription information and/or route optimization policy information are forwarded to the wireless side network element.

Wherein, the communication party address information acquired by the wireless side network element is:

PCRF specifies the IP-CAN session or the transport flow template TFT used in the IP-CAN session initiated by the core network gateway or during the modification process, and notifies the core network gateway; the core network gateway uses the TFT Forwarding to the wireless side network element through the core network mobility management unit; the wireless side network element obtains the IP address of the attached communication party from the TFT;

Or, when the PCRF actively initiates bearer establishment or bearer modification, it will notify the mobility management unit of the TFT used by the IP-CAN session or bearer specified in the IP-CAN session creation or modification process; the mobility management unit will The TFT is forwarded to the wireless side network element; the wireless side network element obtains the IP address of the attached communication party from the TFT;

Or, the network element on the wireless side parses out the IP address of the attached communication party from the header of the received data packet;

Or, after the anchor point gateway acquires the IP address of the attached communication party through the IP address assignment process or monitoring the dynamic host configuration protocol DHCP message process, it notifies the mobility management unit; the mobility management unit sends the IP address of the attached communication party The address is sent to the wireless side network element.

Wherein, the network element at the wireless side is further configured to allow both communication parties to establish a routing channel through the network element at the wireless side without passing through the core network.

Wherein, the network element at the radio side is further configured to, when it is determined that the data needs local routing, match the data to a corresponding radio bearer according to the TFT, and send the data to the communicating party.

Alternatively, the PCRF is used to establish a dedicated bearer for both communication parties or designate a certain bearer for the transmission of route optimization data of both communication parties;

The wireless side network element is further configured to, when it is determined that the data needs local routing, match the data that can perform route optimization to a dedicated bearer or a designated bearer, and match the data that cannot perform route optimization to a corresponding bearer of the core network; or All data is matched to the dedicated bearer/designated bearer.

In the present invention, the network element at the wireless side executes the route optimization judgment according to the acquired route optimization judgment information, and executes the establishment of the route optimization channel when it is judged that the route optimization can be performed. Wherein, the route optimization decision information includes route optimization subscription information and/or route optimization strategy, and information about whether the communication parties are located in the same wireless side network element. When it is determined that the route optimization subscription information and/or route optimization strategies of both communication parties allow route optimization, and both communication parties are located in the same wireless side network element, perform route optimization for both communication parties. The technical scheme of the invention can reduce the time delay of data transmission and reduce the network burden of the core network.

Description of drawings

FIG. 1 is a schematic structural diagram of an evolved packet domain system;

FIG. 2 is a schematic diagram of a user receiving/sending data path;

Figure 3 (a) to (d) are schematic diagrams of the route optimization channel of the present invention;

4 (a) to (e) are schematic diagrams of obtaining routing optimization decision information by wireless side network elements of the present invention;

FIG. 5 is a flow chart of routing optimization determination in an embodiment of the present invention;

FIG. 6 is a flow chart of a routing optimization method according to Embodiment 1 of the present invention;

FIG. 7 is a flow chart of a routing optimization method in Embodiment 2 of the present invention;

FIG. 8 is a flow chart of a routing optimization method in Embodiment 3 of the present invention;

FIG. 9 is a schematic diagram of a composition and structure of a radio side network element according to an embodiment of the present invention.

Detailed ways

The basic idea of the present invention is: the network element at the wireless side executes the routing optimization judgment according to the acquired routing optimization judgment information, and when it is judged that the routing optimization can be performed, executes the establishment of the routing optimization channel.

The routing optimization method of the present invention is applicable to two users communicating with each other under the same service gateway, and the two users may use the same/different anchor gateways, and the present invention is not limited to core network elements.

Figure 3(a) to (d) are schematic diagrams of the route optimization channel of the present invention, as shown in Figure 3(a) to 3(d), the route optimization method of the present invention is applicable to the same wireless side network element and the same core network The situation of the gateway (Figure 3a), the situation of the same wireless side network element, the same serving gateway, and different anchor gateways (Figure 3b), the same wireless side network element, different serving gateways, and different anchor gateways situation (Fig. 3c), and the situation (3d) of the same wireless network element, different serving gateways, and the same anchor gateway. The anchor gateway includes: P-GW, GGSN.

For the 3G network, there is no serving gateway, only the anchor gateway, and the routing optimization method of the present invention is also applicable.

In the figure, the wireless side network elements include: evolved base station (eNB), radio network controller (RNC), home base station (HNB), home evolved base station (HeNB), home base station gateway (H(e)NB GW) and other wireless devices .

In the present invention, the conditions for determining whether the network element on the wireless side can perform route optimization are mainly divided into two aspects: one is policy permission, and the other is whether the intercommunicating users are in the same network element on the wireless side such as a base station. Wherein, the policy refers to whether the user can subscribe for route optimization and/or implement the data policy of route optimization, which is determined by the operator. The policy information can be dynamically or statically configured on the radio side network element.

Wherein, if the network element on the wireless side wants to determine whether two intercommunicating users are under the same base station, it needs to know the corresponding relationship between the destination IP address in the forwarded data packet and the attached user. Therefore, the network element on the wireless side needs to know the IP addresses of all users attached to the network element on the wireless side.

The network elements on the radio side include macro base stations (eNB, RNC), home base stations H(e)NB, and home base station gateways H(e)NB GW, etc.

The network elements on the wireless side can obtain the policy information in the following ways:

Way 1, as shown in Figure 4a, includes the following steps:

Step 4a01, the core network mobility management unit (MME or SGSN) receives the non-access stratum mobility management message (such as attach, location update, etc.) sent by the terminal.

Step 4a02, the mobility management unit sends a location update request message to the subscription data server (HSS or HLR), and registers the information of the mobility management unit to which the user is attached.

In step 4a03, the subscription data server replies with a location update response message, and the message includes policy information required by the network element on the wireless side for routing optimization decision. The policy information includes whether to implement route optimization subscription, which can be per user, or per user per APN. The subscription information also includes a data policy for implementing route optimization, for example, specifying that data on certain subscribed QoS bearers can perform route optimization.

Step 4a04, the core network mobility management unit creates a session connection.

Step 4a05, the core network mobility management unit establishes a radio bearer, and sends policy information to the radio side network element in a radio bearer establishment request message or a context establishment request message instructing the radio side network element to establish a radio bearer. The policy information includes whether the user can subscribe for route optimization, and the operator's data policy for route optimization. The granularity of policy information is not limited, and it can be per user, per user per APN, per user per bearer, per IP flow, or a unified network policy per bearer, per APN, etc.

Way 2, as shown in Figure 4b, includes the following steps:

Step 4b01, the configuration network element (for example, network management system) in the network sends the policy information to the wireless side network element when configuring per-device information (for example, spectrum information, location area identification information, etc.) for the wireless side network element. The policy information is the routing optimization policy for each device, and the granularity is not limited. It can be per bearer, or per IP flow, or per application.

In step 4b02, the network element at the wireless side replies with a configuration response message.

This embodiment can be used in the process of automatically configuring parameters when the network element on the wireless side is powered on.

Way 3, as shown in Figure 4c, includes the following steps:

Step 4c01, the core network mobility management unit (MME or SGSN) sends a session creation or bearer modification request to the core network gateway (S-GW, P-GW or GGSN, wherein the S-GW performs message forwarding).

In step 4c02, the core network gateway interacts with the PCRF. During the establishment or modification of the IP-CAN session, the PCRF sends policy information to the core network gateway. The granularity of the policy information is not limited, and may be per bearer, per user per bearer, per IP flow, per bearer per IP flow, and so on.

In step 4c03, the core network gateway sends the policy information to the core network mobility management unit in response to the session creation or bearer modification response message.

Step 4c04, the core network mobility management unit sends the policy information to the radio side network element in the radio bearer establishment or radio bearer modification message.

Step 4c05, the radio side network element replies a radio bearer establishment or radio bearer modification response message to the core network mobility management unit.

It should be noted that if the PCRF actively initiates bearer establishment or modification, the policy information can also be carried to the core network mobility management unit in the bearer creation or modification request message initiated by the core network gateway, and then notified to the wireless side network element. The method is similar to the above-mentioned method three, and will not be repeated.

The network element on the wireless side can learn the IP address of the user attached to it in the following ways:

Way 1, as shown in Figure 4d, includes the following steps:

Step 4d01, the core network mobility management unit (MME or SGSN) sends a session creation request message or a bearer modification request message to the core network gateway (SGW, P-GW or GGSN, wherein the S-GW performs message forwarding).

In step 4d02, an IP-CAN session establishment/modification process is executed between the core network gateway and the PCRF. In this process, the PCRF specifies the TFT used by the session or the bearer.

In step 4d03, the core network gateway replies a session creation response message or a bearer modification response message to the core network mobility management unit, and the message carries the TFT specified by the PCRF.

Step 4d04, the core network mobility management unit carries TFT in the radio bearer establishment or modification request message. The network element at the wireless side learns the IP address of the attached user from the source address in the TFT.

In step 4d05, the radio side network element replies with a radio bearer establishment/modification response message.

It should be noted that if the PCRF actively initiates bearer establishment or modification, TFT information can also be carried to the core network mobility management unit through the bearer establishment or modification request message initiated by the core network gateway, and then notified to the wireless side network element, the wireless side network The unit obtains the IP address of the attached user from the TFT information. This implementation mode is similar to the first mode, and will not be described in detail.

Method 2: The wireless side network element adds a data packet inspection function, obtains the source IP address from the data packet header, and records it as the IP address information of the attached user.

Method 3, as shown in Figure 4e, includes the following steps:

In step 4e01, the core network anchor gateway (P-GW or GGSN) obtains the user's IP address through the IP address allocation process or the DHCP message monitoring process.

In step 4e02, the core network anchor gateway notifies the core network mobility management unit of the user's IP address through a GTP message or a special notification message or a special data packet.

Step 4e03, the core network mobility management unit notifies the wireless side network element of the user's IP address through an S1/Iu interface message or a special notification message or a special data packet.

In step 4e04, the radio side network element replies with a response message.

Fig. 5 is the routing optimization judgment flow chart of the embodiment of the present invention, as shown in Fig. 5, the routing optimization judgment flow of the embodiment of the present invention comprises the following steps:

After the route optimization determination information is obtained through the manner described in FIG. 4 , the radio side network element can perform the route optimization determination process.

Step 501, the network element at the wireless side checks the source IP address and destination IP address in the received data packet.

Step 502, the wireless side gateway determines whether the user with the source IP address and the destination IP address is attached to it according to the saved IP address of the attached user. If yes, then follow up steps are performed, if not, then the decision process ends.

In step 503, the network element on the wireless side determines whether the user can perform route optimization according to the obtained subscription information. If yes, then follow up steps are performed, if not, then the decision process ends.

In step 504, the network element on the wireless side judges whether the received data packet can be route optimized according to the obtained data policy, if yes, then executes the subsequent steps, if not, then the judgment process ends.

In step 505, the network element at the wireless side starts a route optimization process.

It should be noted that the sequence of step 503 and step 504 can be interchanged, and the steps can be executed optionally.

FIG. 6 is a flow chart of a routing optimization method in Embodiment 1 of the present invention. As shown in FIG. 6 , the routing optimization method in this example includes the following steps:

Step 601, the process described in Figure 4d, the network element on the wireless side obtains the TFT corresponding to the bearer.

Step 602, terminal 1 sends uplink data.

In step 603, the network element at the wireless side performs route optimization judgment according to the process described in FIG. 5 , and if the data needs local routing, it matches it to the corresponding radio bearer according to the TFT.

Step 604, the network element on the wireless side sends the locally routed data to the terminal 2 through the wireless bearer.

FIG. 7 is a flow chart of a route optimization method in Embodiment 2 of the present invention. As shown in FIG. 7, the route optimization method in this example includes the following steps:

In step 701, the network element on the wireless side receives the uplink data sent by the terminal 1 .

Step 702, if the network element on the wireless side determines that local routing needs to be performed, but there is no bearer matching TFT, perform a subsequent step of obtaining a TFT.

Step 703, the network element at the wireless side sends a TFT information acquisition request message to the mobility management unit of the core network, and the message includes the S1-AP UE ID to identify the user.

Step 704, the mobility management unit of the core network performs identity conversion, and maps the S1-AP UE ID to the corresponding IMSI of the user.

Step 705, the core network mobility management unit sends a TFT information acquisition request message to the core network gateway (S-GW, P-GW or GGSN, wherein the S-GW performs message transfer), and the message carries the IMSI to identify the user.

In step 706, the core network gateway replies with a TFT information acquisition response message, which carries the user IMSI, TFT, and core network bearer identification information corresponding to the TFT.

Step 707, the core network mobility management unit performs identity conversion, and converts the core network bearer identity information corresponding to the IMSI and TFT into the S1-AP UE ID and radio bearer identity information that can be recognized by the network element on the radio side.

In step 708, the core network mobility management unit replies with a TFT information acquisition response message, which carries the S1-APUE ID, the TFT, and the radio bearer identification information corresponding to the TFT.

In step 709, the radio side network element matches the data requiring local routing to the corresponding radio bearer according to the received TFT.

Step 710, the network element on the wireless side sends the data to the terminal 2 through the corresponding radio bearer.

FIG. 8 is a flow chart of a routing optimization method in Embodiment 3 of the present invention. As shown in FIG. 8 , the routing optimization method in this example includes the following steps:

In step 801, the PCRF establishes a dedicated bearer for the two intercommunicating users during the bearer establishment process. Or designate a certain bearer to be used for the transmission of route optimization data of two users, identify the bearer through a label, and bearers used for intercommunicating route optimization of two users have the same label. The radio-side network element records the correspondence between the source address, the destination address, and the bearer identifier of the dedicated bearer, or records the bearer mark.

Step 802, when the network element on the wireless side receives the uplink data, it performs a route optimization decision. Bearer matching is performed on data that can perform route optimization, and data that cannot be performed on route optimization is sent to the corresponding bearer of the core network. The present invention can also perform routing optimization of the entire bearer data.

Step 803, when the network element on the radio side decides to perform route optimization, it finds a matching dedicated bearer or a bearer with the same label according to the bearer corresponding to the uplink data, and sends the data to the matching radio bearer.

Step 804, the network element on the radio side sends the route optimization data to the terminal 2 through the matched radio bearer.

It should be noted that the embodiments described in the present invention are all sub-processes performed by network elements, which can be nested in mobility management or session management. limited.

FIG. 9 is a schematic diagram of the composition and structure of the wireless side network element according to the embodiment of the present invention. As shown in FIG. 9 , the wireless side network element according to the embodiment of the present invention includes an acquisition unit 90, a determination unit 91, and an execution unit 92, wherein:

An acquisition unit 90, configured to acquire routing optimization decision information;

A determination unit 91, configured to execute a route optimization determination according to the route optimization determination information, and trigger an execution unit 92 when it is determined that route optimization can be performed;

The execution unit 92 is configured to execute the establishment of the route optimization channel.

Wherein, the route optimization decision information includes route optimization subscription information and/or route optimization strategy, and communication party address information.

The judging unit 91 is further configured to determine that the routing optimization subscription information and/or routing optimization strategies of both communication parties allow route optimization, and when the communication parties are located in the same wireless side network element, it is determined that the communication parties are It can perform route optimization.

The route optimization subscription information and/or route optimization strategy acquired by the acquisition unit 90 is:

The mobility management unit sends the route-optimized subscription information and/or route-optimized policy information received from the subscription data server to the obtaining unit 90 when creating the session.

Alternatively, the acquiring unit 90 acquires the route optimization subscription information and/or the route optimization policy information of the communication party from the configuration network element in the network.

Or, during the process of creating or modifying the IP-CAN session initiated by the core network gateway and the PCRF, the contract information of the communication party's routing optimization and/or the strategy information of routing optimization are obtained from the PCRF, and forwarded to the mobility management unit; Unit 90 acquires the route-optimized subscription information and/or route-optimized policy information from the mobility management unit.

Or, when the PCRF actively initiates bearer establishment or bearer modification, it sends the communication party's route optimization subscription information and/or route optimization policy information to the core network gateway; the core network gateway sends the route optimization The subscription information and/or route optimization policy information are forwarded to the obtaining unit 90.

The communication party address information obtained by the obtaining unit 90 is:

PCRF specifies the IP-CAN session or the transport flow template TFT used in the IP-CAN session initiated by the core network gateway or during the modification process, and notifies the core network gateway; the core network gateway uses the TFT The core network mobility management unit forwards it to the obtaining unit 90; the obtaining unit 90 obtains the IP address of the attached communicating party from the TFT.

Or, when the PCRF actively initiates bearer establishment or bearer modification, it will notify the mobility management unit of the TFT used by the IP-CAN session or bearer specified in the IP-CAN session creation or modification process; the mobility management unit will The TFT is forwarded to the obtaining unit 90; the obtaining unit 90 obtains the IP address of the attached communication party from the TFT;

Or, the acquisition unit 90 yuan parses out the IP address of the attached communication party from the header of the received data packet;

Or, after the anchor point gateway obtains the IP address of the attached communication party through the IP address assignment process or monitoring the dynamic host configuration protocol DHCP message process, it notifies the mobility management unit; the acquisition unit 90 acquires the attached communication party from the mobility management unit. The IP address of the communicating party.

In the present invention, the communication parties share one wireless side network element.

The execution unit 92 is further configured to enable the communication parties to establish a routing channel through the wireless side network element without passing through the core network.

Those skilled in the art should understand that the implementation functions of each processing unit in the wireless side network element shown in FIG. 9 can be understood with reference to the relevant description of the foregoing route optimization method. Those skilled in the art should understand that the functions of each processing unit in the network element at the wireless side shown in FIG. 9 may be implemented by a program running on a processor, or may be implemented by a specific logic circuit.

The present invention also describes a route optimization system, including a service gateway, a mobility management unit, PCRF, a subscription data server, a wireless side network element and a communication party, and the wireless side network element is used to determine the route optimization based on the obtained route The information executes route optimization judgment, and when it is judged that route optimization can be performed, executes the establishment of route optimization channel.

Wherein, the route optimization decision information includes route optimization subscription information and/or route optimization strategy, and communication party address information.

Wherein, the wireless side network element is further configured to determine that both the communication parties' route optimization subscription information and/or route optimization strategies allow route optimization, and when the two communication parties are located in the same wireless side network element, determine Routing optimization can be performed for the communication parties.

The route optimization subscription information and/or route optimization strategy obtained by the network element on the wireless side is:

The mobility management unit sends the route-optimized subscription information and/or route-optimized policy information received from the subscription data server to the wireless side network element when creating the session;

Or, the configuration network element in the network configures the communication party's route-optimized subscription information and/or route-optimized policy information as configuration information to the wireless-side network element;

Or, the core network gateway initiates an IP connection with the policy and charging rule functional entity PCRF to access the network IP-CAN session creation or modification process, and acquires the communication party's route optimization subscription information and/or route optimization strategy from the PCRF information, and forward it to a mobility management unit; the mobility management unit sends the route-optimized subscription information and/or route-optimized policy information to the wireless side network element;

Or, when the PCRF actively initiates bearer establishment or bearer modification, it sends the communication party's route optimization subscription information and/or route optimization policy information to the core network gateway; the core network gateway sends the route optimization The subscription information and/or route optimization policy information are forwarded to the wireless side network element.

Wherein, the communication party address information acquired by the wireless side network element is:

PCRF specifies the IP-CAN session or the transport flow template TFT used in the IP-CAN session initiated by the core network gateway or during the modification process, and notifies the core network gateway; the core network gateway uses the TFT Forwarding to the wireless side network element through the core network mobility management unit; the wireless side network element obtains the IP address of the attached communication party from the TFT;

Or, when the PCRF actively initiates bearer establishment or bearer modification, it will notify the mobility management unit of the TFT used by the IP-CAN session or bearer specified in the IP-CAN session creation or modification process; the mobility management unit will The TFT is forwarded to the wireless side network element; the wireless side network element obtains the IP address of the attached communication party from the TFT;

Or, the network element on the wireless side parses out the IP address of the attached communication party from the header of the received data packet;

Or, after the anchor point gateway acquires the IP address of the attached communication party through the IP address assignment process or monitoring the dynamic host configuration protocol DHCP message process, it notifies the mobility management unit; the mobility management unit sends the IP address of the attached communication party The address is sent to the wireless side network element.

Wherein, the network element at the wireless side is further configured to allow both communication parties to establish a routing channel through the network element at the wireless side without passing through the core network.

Wherein, the network element at the radio side is further configured to, when it is determined that the data needs local routing, match the data to a corresponding radio bearer according to the TFT, and send the data to the communicating party.

Among them, the PCRF is used to establish a dedicated bearer for both communication parties or designate a certain bearer for the transmission of route optimization data of both communication parties;

The wireless side network element is further configured to, when it is determined that the data needs local routing, match the data that can perform route optimization to a dedicated bearer or a designated bearer, and match the data that cannot perform route optimization to a corresponding bearer of the core network; or All data is matched to the dedicated bearer/designated bearer. .

The routing optimization system of the present invention is realized on the basis of the existing network, and it only upgrades the functions of some network elements accordingly, but the network structure is not improved. Therefore, it can refer to the aforementioned routing optimization method and that shown in Figure 9 It can be understood from the relevant description of the wireless side network elements. Since the wireless side network elements and improved related network elements are described in detail above, the details of related network elements and their functions in the routing optimization system will not be repeated here. The relevant network structure of the routing optimization system of the present invention can be understood with reference to the relevant network structure of the foregoing FIGS. 1 to 4 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (18)

1. a kind of routing optimization method, which is characterized in that the method is in same wireless side network element for two user terminals Under network in, the method includes：

Wireless side network element executes the routing optimality between two user terminals according to acquired routing optimality judgement information and judges, And when being judged to that routing optimality can be carried out, the foundation in routing optimality channel between two user terminals is executed；

The routing optimality judgement information includes the signing information of routing optimality and/or the strategy of routing optimality and communication party Address information.

2. according to the method described in claim 1, it is characterized in that, described be judged to that routing optimality can be carried out, it is：

The signing information of the routing optimality of the communicating pair and/or the strategy of routing optimality allow routing optimality, and described Communicating pair is located in the network element of same wireless side, is determined as that the communicating pair can carry out routing optimality.

3. method according to claim 1 or 2, which is characterized in that the signing information of the routing optimality of the acquisition and/or The strategy of routing optimality is：

Mobility management unit is when creating session by the signing information of the routing optimality received by the subscription data server And/or the policy information of routing optimality is sent to the wireless side network element；

Alternatively, configuration network element in network is by the signing information of the routing optimality of communication party and/or the policy information of routing optimality It is configured in the wireless side network element as configuration information；

Alternatively, core network gateway initiates the IP connected reference network IP-CAN sessions with strategy and charging regulation function entity PCRF During creating or changing, the signing information of the routing optimality of communication party and/or the strategy of routing optimality are obtained from the PCRF Information, and it is transmitted to mobility management unit；The mobility management unit is by the signing information of the routing optimality and/or road The wireless side network element is sent to by the policy information optimized；

Alternatively, when PCRF actively initiates carrying foundation or bearing modification, by the signing information of the routing optimality of communication party and/or road Core network gateway is sent to by the policy information optimized；The core network gateway is excellent by the routing by mobility management unit The signing information of change and/or the policy information of routing optimality are transmitted to the wireless side network element.

4. method according to claim 1 or 2, which is characterized in that the correspondent addresses information of the acquisition is：

The IP-CAN conversation establishings or modification that PCRF is initiated in core network gateway specify the IP-CAN sessions or carrying in the process Used transmission stream template TFT, and notify the core network gateway；The TFT is passed through core net by the core network gateway Mobility management unit is transmitted to the wireless side network element；The wireless side network element is obtained from the TFT has adhered to communication party IP address；

Alternatively, when PCRF actively initiates carrying foundation or bearing modification, it will be specified during IP-CAN conversation establishings or modification IP-CAN sessions or carrying used in TFT notify mobility management unit；The mobility management unit turns the TFT Issue the wireless side network element；The wireless side network element obtains the IP address for having adhered to communication party from the TFT；

Alternatively, the wireless side network element parses the IP address for having adhered to communication party from received packet header；

Alternatively, anchor gateway is attached by IP address assigning process or monitoring DynamicHost setting Protocol DHCP messages process acquisition After the IP address of communication party, mobility management unit is notified；The mobility management unit has adhered to communication party's by described IP address is sent to the wireless side network element.

5. method according to claim 1 or 2, which is characterized in that the communicating pair shares a wireless side network element.

6. according to the method described in claim 5, it is characterized in that, the foundation for executing routing optimality channel, is：

Communicating pair establishes routing channel without core net by the wireless side network element.

7. according to the method described in claim 5, it is characterized in that, the foundation for executing routing optimality channel, is：

When the wireless side network element determines that data need local routing, according to TFT by Data Matching to corresponding radio bearer, It is sent to communication party.

8. according to the method described in claim 5, it is characterized in that, the foundation for executing routing optimality channel, is：

PCRF is that communicating pair establishes the transmission of dedicated bearer or specified certain carrying for communicating pair route optimized data；

When the wireless side network element determines that data need local routing, by the Data Matching of executable routing optimality to dedicated bearer It, will be in the Data Matching to the corresponding carrying of core net of not executable routing optimality or on designated bearing；Or all data are equal It is matched on dedicated bearer/designated bearing.

9. according to the method described in claim 5, it is characterized in that, the wireless side network element includes：Evolution base station, base station control Device, Home eNodeB, home evolved node B, femto gateway.

10. a kind of wireless side network element, which is characterized in that the wireless side network element includes acquiring unit, judging unit and executes list Member, wherein：

Acquiring unit judges information for obtaining routing optimality；

Judging unit, for judging that the routing optimality between information two user terminals of execution judges according to the routing optimality, And when being judged to that routing optimality can be carried out, execution unit is triggered；Described two user terminals are under the network element of same wireless side；

Execution unit is used to execute the foundation in routing optimality channel between two user terminals；

The routing optimality judgement information includes the signing information of routing optimality and/or the strategy of routing optimality and communication party Address information.

11. wireless side network element according to claim 10, which is characterized in that the judging unit is additionally operable to, described in determination The signing information of the routing optimality of communicating pair and/or the strategy of routing optimality allow routing optimality, and the communicating pair When in the network element of same wireless side, it is determined as that the communicating pair can carry out routing optimality.

12. a kind of route optimization system, including it is gateway, mobility management unit, PCRF, subscription data server, wireless Side network element and communication party, which is characterized in that the wireless side network element is used for, and is executed according to acquired routing optimality judgement information Routing optimality judgement between two user terminals, and when being judged to that routing optimality can be carried out, execute two user terminals it Between routing optimality channel foundation；Described two user terminals are under the network element of same wireless side；

The routing optimality judgement information includes the signing information of routing optimality and/or the strategy of routing optimality and communication party Address information.

13. system according to claim 12, which is characterized in that the wireless side network element is additionally operable to, and determines the communication The signing information of the routing optimality of both sides and/or the strategy of routing optimality allow routing optimality, and the communicating pair is located at When in the network element of same wireless side, it is determined as that the communicating pair can carry out routing optimality.

14. system according to claim 12 or 13, which is characterized in that the routing optimality that the wireless side network element obtains The strategy of signing information and/or routing optimality is：

Mobility management unit is when creating session by the signing information of the routing optimality received by the subscription data server And/or the policy information of routing optimality is sent to the wireless side network element；

Alternatively, configuration network element in network is by the signing information of the routing optimality of communication party and/or the policy information of routing optimality It is configured in the wireless side network element as configuration information；

Alternatively, core network gateway initiates the IP connected reference network IP-CAN sessions with strategy and charging regulation function entity PCRF During creating or changing, the signing information of the routing optimality of communication party and/or the strategy of routing optimality are obtained from the PCRF Information, and it is transmitted to mobility management unit；The mobility management unit is by the signing information of the routing optimality and/or road The wireless side network element is sent to by the policy information optimized；

Alternatively, when PCRF actively initiates carrying foundation or bearing modification, by the signing information of the routing optimality of communication party and/or road Core network gateway is sent to by the policy information optimized；The core network gateway is excellent by the routing by mobility management unit The signing information of change and/or the policy information of routing optimality are transmitted to the wireless side network element.

15. system according to claim 12 or 13, which is characterized in that the correspondent addresses that the wireless side network element obtains Information is：

The IP-CAN conversation establishings or modification that PCRF is initiated in core network gateway specify the IP-CAN sessions or carrying in the process Used transmission stream template TFT, and notify the core network gateway；The TFT is passed through core net by the core network gateway Mobility management unit is transmitted to the wireless side network element；The wireless side network element is obtained from the TFT has adhered to communication party IP address；

Alternatively, when PCRF actively initiates carrying foundation or bearing modification, it will be specified during IP-CAN conversation establishings or modification IP-CAN sessions or carrying used in TFT notify mobility management unit；The mobility management unit turns the TFT Issue the wireless side network element；The wireless side network element obtains the IP address for having adhered to communication party from the TFT；

Alternatively, the wireless side network element parses the IP address for having adhered to communication party from received packet header；

Alternatively, anchor gateway is attached by IP address assigning process or monitoring DynamicHost setting Protocol DHCP messages process acquisition After the IP address of communication party, mobility management unit is notified；The mobility management unit has adhered to communication party's by described IP address is sent to the wireless side network element.

16. system according to claim 12 or 13, which is characterized in that the wireless side network element is additionally operable to, and keeps communication double Side establishes routing channel without core net by the wireless side network element.

17. system according to claim 16, it is characterised in that：

The wireless side network element is additionally operable to, when determining that data need local routing, according to TFT by Data Matching to corresponding wireless In carrying, it is sent to communication party.

18. system according to claim 16, it is characterised in that：

PCRF is used for, and the biography of dedicated bearer or specified certain carrying for communicating pair route optimized data is established for communicating pair It is defeated；

The wireless side network element is additionally operable to, and when determining that data need local routing, the Data Matching of executable routing optimality is arrived It, will be in the Data Matching to the corresponding carrying of core net of not executable routing optimality on dedicated bearer or designated bearing；Or institute There are data to be matched on dedicated bearer/designated bearing.