WO2018045515A1

WO2018045515A1 - Data offloading method and related device

Info

Publication number: WO2018045515A1
Application number: PCT/CN2016/098360
Authority: WO
Inventors: 靳维生
Original assignee: 华为技术有限公司
Priority date: 2016-09-07
Filing date: 2016-09-07
Publication date: 2018-03-15

Abstract

A data offloading method and a related device, comprising: an SGW-C selects, on the basis of an offloading policy, a distribution gateway (DGW) to perform user-side data transmission for a UE, transmits connection address information of a serving base station to the DGW, and transmits first connection address information of the DGW to the serving base station for use in establishing a first communication connection between the DGW and the serving base station; and the SGW-C transmits an offload description corresponding to the serving base station to the DGW for use by the DGW in offloading, on the basis of the offload description, data of the UE received via the first communication connection. Thus implemented, with respect to service anywhere distribution and local service deployment requirements, is offloading of service data via the DGW, and thereby reducing delay for the service data.

Description

Data distribution method and related device

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data offloading method and related apparatus.

Background technique

In the prior art, an Access Point Name (APN) usually points to a Packet Data Network (PDN) that provides a series of service capabilities. A typical PDN is a service network that provides services for the operator's Internet Protocol Multimedia Subsystem (IMS) service. It is usually deployed in a centralized computer room behind the mobile operator's core network gateway. Another typical PDN is provided. Internet for the Internet service. At first, mobile operators also provided Internet access services to users through the deployment of mobile operator core network gateways. Currently, there are many locations for Internet service access. The PDN connection is a channel formed by one or more bearers of a PDN Gateway (PGW) connected to the PDN. The UE can establish multiple PDN connections using the same APN, but must be the same PDN GW and different IP address types (IPv4, IPv6).

With the development of the mobile Internet, the Internet has become the mainstream of mobile operators. The third-party service provider/OTT (Over The Top) deploys various services in the data centers distributed everywhere. These data centers may even be located in the mobile network. On a node (such as the location close to the wireless access network). However, according to existing protocols, data is sent to an external PDN network or the Internet through a PGW. Routing a large number of service packets to the PGW adds latency and reduces the user experience.

Summary of the invention

The present application provides a data offloading method and related device, which is used to implement traffic offloading through the DGW, thereby effectively avoiding routing a large amount of service data to the PGW, reducing the delay of the service data, and satisfying the mobile edge calculation. demand.

The application provides a data offloading method, the method comprising:

The SGW-C selects a DGW for performing user plane data transmission for the user equipment UE according to the offload policy;

Sending, by the SGW-C, a first notification message to the DGW, where the first notification message includes connection address information of a serving base station of the UE;

The SGW-C sends a second notification message to the serving base station, where the second notification message includes first connection address information of the DGW, connection address information of the serving base station, and a first connection of the DGW. The address information is used to establish a first communication connection between the DGW and the serving base station;

The SGW-C sends a traffic distribution description corresponding to the serving base station to the DGW, where the traffic distribution description is used by the DGW to perform data on the UE received through the first communication connection according to the traffic distribution description. Diversion.

In this way, the SGW-C selects the DGW for the UE to perform the user plane data transmission, so that the DGW can offload the data of the UE according to the traffic distribution description, thereby realizing the traffic data to be shunted through the DGW, thereby effectively avoiding a large amount of service data. Routing to the PGW reduces the delay of the service data, satisfies the requirements of mobile edge computing, and has less impact on the network.

Optionally, the offload description includes destination address information of the data to be offloaded;

The offloading description is used by the DGW to offload data of the UE that is received by using the first communications connection according to the offloading description, including:

When the destination address information of the data of the UE that is received by the DGW through the first communication connection is the same as the destination address information of the data to be offloaded, the offload description is used by the DGW to pass the The data of the UE received by a communication connection is sent to the local server connected to the DGW.

In this way, the offload description includes the destination address information of the data to be offloaded, so that the DGW can compare the destination address information of the received UE data with the destination address information of the data to be offloaded, and when the two are the same, the UE data is It is sent to the local server connected to the DGW, so as to implement the offloading according to the destination address information of the data, so that the splitting is more accurate.

Optionally, the method further includes:

The SGW-C sends a third notification message to the DGW, where the third notification message includes connection address information of the packet data network gateway user plane PGW-U;

The SGW-C sends a fourth notification message to the PGW-U, where the fourth notification message includes second connection address information of the DGW, connection address information of the PGW-U, and the DGW The second connection address information is used to establish a second communication connection between the DGW and the PGW-U.

Optionally, the offloading description is used by the DGW to offload data of the UE that is received by using the first communications connection according to the offloading description, including:

When the destination address information of the data of the UE that is received by the DGW through the first communication connection is different from the destination address information of the data to be offloaded, the offload description is used by the DGW to pass the The data of the UE received by the first communication connection is sent to the PGW-U.

In this way, by establishing the second communication connection, the DGW and the PGW-U can communicate, so that the DGW can send data different from the destination address information of the data to be offloaded to the PGW-U, thereby adopting gateway control and forwarding separation. In the form of the traffic distribution and the local service deployment requirements, the service data can be offloaded by the DGW, so that the service data can be simultaneously sent to the local server connected to the DGW according to the access requirement of the UE without the UE being aware of the UE. And PGW, not only maintains the user's usage habits, but also effectively avoids routing a large amount of business data to the PGW.

Optionally, the connection address information of the serving base station of the UE is an IP address of the serving base station of the UE and a tunnel endpoint identifier TEID;

The first connection address information of the DGW is the first IP address and the first TEID of the DGW;

The second connection address information of the DGW is a second IP address and a second TEID of the DGW;

The connection address information of the PGW-U is an IP address and a TEID of the PGW-U.

In this way, the connection address information includes an IP address and a TEID, and the communication connection established based on the IP address and the TEID enables more efficient communication between the serving base station, the DGW, and the PGW-U.

Optionally, the offloading policy includes: attribute information of the UE, identifier information of a serving base station of the UE, an access point name APN accessed by the UE, and bearer quality of service QoS information. One or any combination.

Optionally, before the SGW-C selects the DGW for performing user plane data transmission, the method further includes:

The SGW-C receives a session start request message sent by the MME; the session start request message includes the offload policy.

In this way, after the UE accesses the network, the SGW-C can select the DGW for performing user plane data transmission according to the offload policy, so that the UE can meet the different access requirements of the UE in time without the UE being aware.

Optionally, before the SGW-C selects the DGW for performing user plane data transmission on the UE, the method further includes:

The SGW-C receives the bearer modification request message sent by the MME, where the bearer modification request message includes the traffic off policy.

In this manner, after the UE is handed over from the original serving base station to the target base station, the SGW-C is triggered to select a DGW for user plane data transmission, so that the DGW can offload the data of the UE according to the traffic distribution description, thereby adopting gateway control and forwarding. In the case of a separate form, the service data can be offloaded by the DGW for the traffic distribution and the local service deployment requirements, so that the service data can be simultaneously sent to the DGW connected local according to the access requirement of the UE without the UE being aware of the UE. The server and the PGW not only maintain the user's usage habits, but also effectively avoid routing all the business data to the PGW.

The SGW-C receives a offload request message sent by the SGW-U1 for user plane data transmission of the UE; the offload request message is used to request the SGW-C to select a DGW for user plane data transmission for the UE. .

The SGW-U1 detects the data of the UE according to the traffic distribution description, and after detecting the data, triggers the SGW-C to select the DGW for the UE to perform user plane data transmission, thereby real-time monitoring the data to implement timely timely The data is offloaded, and then responds to the UE's distribution service in time. access.

Optionally, after the SGW-C selects the DGW that performs user plane data transmission for the UE, the SGW-C further includes:

The SGW-C sends a fifth notification message to the SGW-U1, where the fifth notification message includes third connection address information of the DGW, and the third connection address information of the DGW is used by the SGW- U1 forwarding data of the UE to the DGW according to the third connection address information of the DGW;

The offloading description is further used by the DGW to offload the received data of the UE that is forwarded by the SGW-U1 according to the offloading description.

In this way, the SGW-C sends the third connection address information of the DGW to the SGW-U1, so that the SGW-U1 can forward the data of the UE to the DGW, so that the DGW can offload the data of the UE.

Optionally, the method further includes:

Sending, by the SGW-C, the identifier information of the last data packet sent by the serving base station to the SGW-U1 to the DGW, where the identifier information of the last data packet is used by the DGW to determine After the received data of the UE forwarded by the SGW-U1 is completed, the data of the UE received through the first communication connection is offloaded.

In this way, the DGW offloads the data of the UE according to the sequence number of the last uplink data packet, and determines the location received by the first communication connection after the data of the UE forwarded by the received SGW-U2 is completed. The data of the UE is shunted, which effectively avoids the disorder of the serial number of the data packet.

Optionally, before the SGW-C sends the traffic distribution description corresponding to the serving base station to the DGW, the method further includes:

Receiving, by the SGW-C, a first general packet radio service technology GPRS tunneling protocol control plane GTP-C message sent by the mobility management entity MME, where the GTP-C message includes the offload description; or

The SGW-C receives a GTP-C message sent by the packet data gateway control plane PGW-C, The shunt description is included in the GTP-C message; or,

The SGW-C obtains the offload description from the service capability opening function SCEF.

In this way, the SGW-C can obtain the shunt description through multiple ways to improve the processing efficiency.

Another data offloading method provided by the present application includes:

Receiving, by the DGW, a first notification message sent by the SGW-C, where the first notification message includes connection address information of the serving base station of the UE;

The DGW establishes a first communication connection with the serving base station of the UE according to the connection address information of the serving base station of the UE and the first connection address information of the DGW;

And the DGW receives the traffic distribution description corresponding to the serving base station of the UE that is sent by the SGW-C, and offloads the data of the UE that is received by using the first communication connection according to the traffic distribution description.

In this way, the DGW establishes a first communication connection with the serving base station of the UE, so that the DGW can offload the data of the UE according to the traffic distribution description, so that when the gateway control and forwarding separate forms are adopted, the traffic distribution and the local service deployment requirements are respectively required. The service data can be offloaded through the DGW, which reduces the delay of the service data, satisfies the requirements of the mobile edge computing, and has less impact on the network.

The DGW, according to the offloading description, offloads data of the UE that is received by using the first communications connection, and includes:

Determining, by the DGW, destination address information of data of the UE received through the first communication connection;

Determining, by the DGW, the destination address information of the data of the UE that is received by the first communication connection is the same as the destination address information of the data to be offloaded, and sending the data of the UE to the local server.

In this way, the DGW acquires the destination address information of the received data of the UE, and the destination address information of the data to be offloaded, when the two are the same, sends the data of the UE to the local server connected to the DGW, thereby implementing the basis. The destination address information of the data is offloaded, making the split more accurate. Indeed.

Optionally, the method further includes:

Receiving, by the DGW, a third notification message sent by the SGW-C, where the third notification message includes connection address information of the PGW-U;

The DGW establishes a second communication connection with the PGW-U according to the connection address information of the PGW-U and the second connection address information of the DGW.

Optionally, the DGW, according to the offloading description, offloading data of the UE that is received by using the first communications connection, including:

Determining, by the DGW, that the destination address information of the data of the UE that is received by the first communication connection is different from the destination address information of the data to be offloaded, and sending the data of the UE to the PGW-U .

Optionally, the method further includes:

Receiving, by the DGW, data of the UE that is forwarded by the SGW-U1 that performs user plane data transmission on the UE;

The DGW offloads the received data of the UE forwarded by the SGW-U1 according to the offload description.

Optionally, the method further includes:

Obtaining, by the DGW, identifier information of a last data packet sent by the serving base station of the UE to the SGW-U1;

Determining, according to the identification information of the last data packet, the DGW to receive the After the data splitting of the UE forwarded by the SGW-U1 is completed, the data of the UE received through the first communication connection is offloaded.

The application provides an SGW-C entity, including: a selection module, a transceiver module;

The selecting module is configured to select, according to the offload policy, a DGW that performs user plane data transmission for the UE;

The transceiver module is configured to send a first notification message to the DGW, where the first notification message includes connection address information of a serving base station of the UE, and send a second notification message to the serving base station, The second notification message includes the first connection address information of the DGW, and the connection address information of the serving base station and the first connection address information of the DGW are used to establish a first between the DGW and the serving base station. a communication connection; and sending, to the DGW, a traffic distribution description corresponding to the serving base station, where the traffic distribution description is used by the DGW to offload data of the UE received through the first communication connection according to the traffic distribution description .

Optionally, the transceiver module is further configured to:

Sending, to the DGW, a third notification message, where the third notification message includes connection address information of a packet data network gateway user plane PGW-U; and sending a fourth notification message to the PGW-U, the fourth The notification message includes second connection address information of the DGW, the PGW-U The connection address information and the second connection address information of the DGW are used to establish a second communication connection between the DGW and the PGW-U.

Optionally, before the processing module selects the distribution gateway DGW that performs user plane data transmission for the user equipment UE according to the offloading policy, the transceiver module is further configured to:

Receiving a session start request message sent by the MME; the session start request message includes the offload policy.

Receiving a bearer modification request message sent by the MME; the bearer modification request message includes the traffic off policy.

Receiving a offload request message sent by the SGW-U1 for user plane data transmission of the UE; the offload request message is used to request the SGW-C to select a DGW for user plane data transmission for the UE.

The application provides a DGW, and the DGW includes: a transceiver module and a processing module;

The transceiver module is configured to receive a first notification message sent by the SGW-C, where the first notification message includes connection address information of the serving base station of the UE;

The processing module is configured to establish a first communication connection with the serving base station of the UE according to the connection address information of the serving base station of the UE and the first connection address information of the DGW;

The transceiver module is further configured to receive a traffic distribution description corresponding to the serving base station of the UE that is sent by the SGW-C;

The processing module is further configured to offload data of the UE received through the first communication connection according to the offload description.

The processing module is specifically configured to:

Obtaining destination address information of data of the UE received through the first communication connection;

After determining that the destination address information of the data of the UE that is received by the first communication connection is the same as the destination address information of the data to be offloaded, the data of the UE is sent to the local server connected to the DGW.

Optionally, the transceiver module is further configured to: receive a third notification message sent by the SGW-C, where the third notification message includes connection address information of the PGW-U;

The processing module is further configured to establish a second communication connection with the PGW-U according to the connection address information of the PGW-U and the second connection address information of the DGW.

Optionally, the processing module is specifically configured to:

After determining that the destination address information of the data of the UE that is received by the first communication connection is different from the destination address information of the data to be offloaded, the data of the UE is sent to the PGW-U.

Optionally, the transceiver module is further configured to: receive data of the UE that is forwarded by the SGW-U1 that performs user plane data transmission for the UE;

The processing module is further configured to: perform offloading, according to the offloading description, the received data of the UE that is forwarded by the SGW-U1.

This application provides another SGW-C entity, including:

a processor, configured to select, according to the offload policy, a distribution gateway DGW that performs user plane data transmission for the user equipment UE;

a communication interface, configured to send a first notification message to the DGW, where the first notification message includes connection address information of a serving base station of the UE; and send a second notification message to the serving base station, where the second The notification message includes first connection address information of the DGW, connection address information of the serving base station, and first connection address information of the DGW for establishing the DGW and the And a first communication connection between the serving base stations; and sending, to the DGW, a traffic distribution description corresponding to the serving base station, where the traffic distribution description is used by the DGW to receive, by using the first communication connection, according to the traffic distribution description The data of the UE is offloaded.

Optionally, the communication interface is further configured to:

Sending, to the DGW, a third notification message, where the third notification message includes connection address information of a packet data network gateway user plane PGW-U; and sending a fourth notification message to the PGW-U, the fourth The notification message includes second connection address information of the DGW, and the connection address information of the PGW-U and the second connection address information of the DGW are used to establish a second between the DGW and the PGW-U Communication connection.

Optionally, before the processor selects the distribution gateway DGW that performs user plane data transmission for the user equipment UE according to the offload policy, the communication interface is further configured to:

This application provides another DGW, including:

a communication interface, configured to receive a first notification message sent by the SGW-C, where the first notification message includes connection address information of the serving base station of the UE;

a processor, configured to establish a first communication connection with the serving base station of the UE according to the connection address information of the serving base station of the UE and the first connection address information of the DGW;

The communication interface is further configured to receive a traffic distribution description corresponding to the serving base station of the UE that is sent by the SGW-C;

The processor is further configured to offload data of the UE received through the first communication connection according to the offload description.

The processor is specifically configured to:

Optionally, the communication interface is further configured to: receive a third notification message sent by the SGW-C, where the third notification message includes connection address information of the PGW-U;

The processor is further configured to establish a second communication connection with the PGW-U according to the connection address information of the PGW-U and the second connection address information of the DGW.

Optionally, the processor is specifically configured to:

Optionally, the communication interface is further configured to: receive data of the UE that is forwarded by the SGW-U1 that performs user plane data transmission for the UE;

The processor is further configured to: offload, according to the offload description, the data of the UE that is forwarded by the received SGW-U1.

In the present application, the SGW-C selects the DGW for the UE to perform user plane data transmission, and offloads the data of the UE through the DGW, so that when the gateway control and forwarding separation are adopted, the service distribution and the local service deployment requirements are respectively required. The service data can be offloaded through the DGW, which reduces the delay of the service data, satisfies the requirements of the mobile edge computing, and has less impact on the network.

DRAWINGS

In order to more clearly illustrate the technical solution of the present application, the drawings to be used in the embodiments will be briefly described below.

1 is a schematic structural diagram of a communication network provided by the present application;

2 is a schematic flowchart of a data offloading method provided in Embodiment 1 of the present application;

3 is a schematic flowchart of a data offloading method according to Embodiment 2 of the present application;

4 is a schematic flowchart of a data offloading method according to Embodiment 3 of the present application;

FIG. 5 is a schematic flowchart of a data offloading method according to Embodiment 4 of the present application;

6 is a schematic structural diagram of an SGW-C entity provided by the present application;

FIG. 7 is a schematic structural diagram of a distribution gateway provided by the present application;

8 is a schematic structural diagram of another SGW-C entity provided by the present application;

FIG. 9 is a schematic structural diagram of another distribution gateway provided by the present application.

detailed description

The terms "first", "second", "first" in the specification and claims of the present invention and the above drawings The third and fourth and the like are used to distinguish different objects, and are not intended to describe a particular order. In addition, the terms "including" and "having" and any variants thereof are intended to cover non-exclusive inclusions. The processes, methods, systems, products, or devices of the series of steps or units are not limited to the listed steps or units, but optionally also include steps or units not listed, or alternatively also for such processes, Other steps or units inherent to the method, product or device.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a communication network provided by the present application. The communication network shown in FIG. 1 includes: a UE 101, an Evolved NodeB (eNB) 102, a Mobility Management Entity (MME) 103, and a Serving Gateway (SGW-C) control plane (SGW-C). 1041, a serving gateway user plane (SGW-U) 1042, a packet data gateway control plane (PGW-C) 1051, a packet data gateway user plane (PGW-U) 1052, and a distribution gateway (DGW) 1043. The mobility management entity (MME, Mobility Management Entity) 103, the serving gateway (SGW, Serving Gateway) control plane (SGW-C) 1041, the serving gateway user plane (SGW-U) 1042, the packet data gateway control plane (PGW) -C) 1051 and Packet Data Gateway User Plane (PGW-U) 1052 are both core network devices. Further, SGW-C1041 and PGW-C1051 may be collectively referred to as a Gateway Control Plane (GW-C), and SGW-U1042 and PGW-U1052 may be collectively referred to as a Gateway Control User Plane (GW-U). The SGW-C1041 and the SGW-U1042 may be collectively referred to as a service gateway, and the two may be two entities separated by the service gateway, or may be located in the service gateway, and are responsible for different functions. The PGW-C1051 and the PGW-U1052 may be collectively referred to as a packet data gateway. The two may be two entities separated by a packet data gateway, or may be located in a packet data gateway, and are responsible for different functional implementations.

Communication between the UE 101 and the eNB 102 can be through a wireless link. The core network device may be responsible for establishing its associated dedicated bearer (for example, a bearer with a QoS Class Identifier (QCI)=1) for the UE 101 to transmit relevant user plane data (eg, media data). The DGW is used to offload service data and reduce the delay of service data to meet the requirements of mobile edge computing.

The DGW 1043 may be a distributed service gateway, and may be a service gateway user plane SGW-U2 deployed locally.

The present application can also be applied to a network architecture such as a 5G network and a 4G Long Term Evolution (LTE) network.

In this application, the user equipment UE may be a wireless terminal or a wired terminal, and may be, for example, a mobile phone, a computer, a tablet computer, a personal digital assistant (abbreviation: PDA), or a mobile internet device (English: mobile Internet device, abbreviation: MID), wearable device and e-book reader (English: e-book reader). The eNB includes, but is not limited to, newly defined base stations in 5G and enhancements to 4G LTE base stations. The MME includes a control plane entity that is not limited to any of the newly defined functions in the 5G, including mobility, authentication, authorization, and session management, and enhancements to the 4G MME.

Some technical solutions of the present application may be specifically implemented based on the communication network architecture shown in FIG. 1 or its variant architecture.

Embodiment 1

FIG. 2 is a schematic flowchart diagram of a data offloading method provided in Embodiment 1 of the present application. As shown in FIG. 2, step 2011 to step 2013 are steps described by SGW-C as an execution subject, and steps 2021 to 2022 are steps described by the DGW as an execution subject, and the method includes:

Step 2011, the SGW-C selects a distribution gateway DGW for user plane data transmission for the user equipment UE according to the offload policy;

In step 2012, the SGW-C sends a first notification message to the DGW, where the first notification message includes connection address information of the serving base station of the UE. Correspondingly, in step 2021, the DGW receives the first sent by the SGW-C. a notification message;

In step 2013, the SGW-C sends a second notification message to the serving base station, where the second notification message includes first connection address information of the DGW, connection address information of the serving base station, and the DGW. The first connection address information is used to establish a first communication connection between the DGW and the serving base station; correspondingly, in step 2022, the DGW is configured according to connection address information of the serving base station of the UE and the DGW Establishing a first communication connection with the serving base station of the UE by using the connection address information;

In step 2014, the SGW-C sends a shunt description corresponding to the serving base station to the DGW. The offloading description is used by the DGW to offload data of the UE that is received by using the first communications connection according to the offloading description; correspondingly, in step 2023, the DGW receives the sending by the SGW-C. a traffic distribution description corresponding to the serving base station of the UE, and offloading data of the UE received through the first communication connection according to the traffic distribution description.

It should be noted that the numbering of each step is only an exemplary description of an execution process, and the present application does not explicitly define the specific steps.

In the present application, the SGW-C selects the DGW for the UE to perform user plane data transmission, and offloads the data of the UE through the DGW, so that when the gateway control and forwarding separation are adopted, the service distribution and the local service deployment requirements are respectively required. The service data can be offloaded by the DGW, so that the service data can be simultaneously sent to the local server and the PGW connected to the DGW according to the access requirement of the UE, which not only maintains the usage habits of the user, but also effectively avoids A large amount of service data is routed to the PGW, which reduces the delay of the service data, satisfies the requirements of the mobile edge computing, and has less impact on the network.

In this application, a plurality of scenarios may be triggered to trigger the SGW-C to select a DGW for user plane data transmission. The following is a specific description of scenario 1 to scenario 3.

Scenario 1: The SGW-C receives a session start request message sent by the MME, where the session start request message includes a traffic off policy, and the SGW-C selects a DGW for user plane data transmission according to the traffic off policy; wherein, the session start request The message is sent by the MME after receiving the PDN connection request message sent by the UE. That is, after the UE accesses the network, the UE sends a PDN connection request message to the MME, and triggers the MME to send a session start request message to the SGW-C, and then triggers the SGW-C to select the DGW for the UE to perform user plane data transmission.

Scenario 2: The SGW-C receives a bearer modification request message sent by the MME, where the bearer modification request message includes a traffic off policy, and the SGW-C selects a DGW for user plane data transmission according to the traffic off policy; The message is that the MME determines that the UE is sent by the serving base station of the UE to the target base station. That is, after the UE is handed over to the target base station by the serving base station of the UE, the target base station sends a path switching request message to the MME, triggering the MME to send a bearer modification request message to the SGW-C, and then triggering the SGW-C to select the UE. Use DGW for the transfer of household data.

Scenario 3: After receiving the offload request message sent by the SGW-U for user plane data transmission, the SGW-C selects a local service gateway user plane SGW for user plane data transmission according to the offload policy. -U; the offload request message is sent by the SGW-U according to the offload description to determine that the data of the UE needs to be offloaded. Specifically, the SGW-U that performs the user plane data transmission of the UE detects the destination address of the uplink data packet sent by the UE, determines, according to the traffic distribution description, that the traffic to be offloaded is cached, and sends the traffic to the SGW-C. Sending a offload request message, triggering the SGW-C to select a DGW for performing user plane data transmission for the UE.

In addition to the above three scenarios, the present application can be applied to other scenarios, for example, the UE moves in an idle state, and after the location update is generated, the SGW-C also selects the DGW that performs user plane data transmission for the UE. The process needs to be described. In this case, the new SGW-C selects the DGW for user plane data transmission for the UE after the UE changes its location.

In the embodiment of the present invention, the offloading policy may include the attribute information of the UE, the identifier information of the serving base station of the UE, the APN accessed by the UE, and the Quality of Service (QoS) information. Any one or any combination.

The attribute information of the UE may include the identifier information of the UE, etc., and the content included in the attribute information of the UE may be determined according to the policy that the SGW-C selects the DGW. The identification information of the serving base station of the UE may be obtained according to the location information of the UE. Therefore, the location information of the UE may also be directly included in the foregoing offloading policy. The bearer QoS information may be a QoS Class Identifier (QCI).

The embodiment of the present invention further includes: the SGW-C sends a third notification message to the DGW, where the third notification message includes connection address information of the packet data network gateway user plane PGW-U; the SGW-C The PGW-U sends a fourth notification message, where the fourth notification message includes the second connection address information of the DGW, and the connection address information of the PGW-U and the second connection address information of the DGW are used to establish a second communication connection between the DGW and the PGW-U. Correspondingly, the DGW receives the third notification message sent by the SGW-C, and according to the PGW-U The connection address information and the second connection address information of the DGW establish a second communication connection with the PGW-U.

The connection address information of the serving base station of the UE is the IP address of the serving base station of the UE and the tunnel endpoint identifier TEID; the first connection address information of the DGW is the first IP address and the first TEID of the DGW. The second connection address information of the DGW is a second IP address and a second TEID of the DGW; and the connection address information of the PGW-U is an IP address and a TEID of the PGW-U.

In the present application, before the SGW-C sends the offloading description corresponding to the serving base station to the DGW in step 2014, the method further includes:

The SGW-C receives a first general packet radio service technology GPRS tunneling protocol control plane GTP-C message sent by the mobility management entity MME, where the GTP-C message includes the offload description; or the SGW-C And receiving the GTP-C message sent by the packet data gateway control plane PGW-C, where the GTP-C message includes the traffic distribution description; or the SGW-C acquires the traffic distribution description from the service capability opening function SCEF.

In the embodiment of the present invention, the traffic description may include the destination address information of the data to be offloaded. Specifically, the destination address information may be the destination IP address and the destination port. Further, the traffic distribution description may further include the source IP address of the data to be offloaded. The address, source port, and transport layer protocol, that is, the split description may include quintuple information of the data to be offloaded.

Correspondingly, in step 2023, the DGW offloads data of the UE received through the first communication connection according to the offloading description, including: the DGW acquisition is received through the first communication connection. The destination address information of the data of the UE; if the DGW determines that the destination address information of the data of the UE received through the first communication connection is the same as the destination address information of the data to be offloaded, The data of the UE is sent to the local server connected to the DGW; if the DGW determines that the destination address information of the data of the UE received through the first communication connection is different from the destination address information of the data to be offloaded And transmitting the data of the UE to the PGW-U through a second communication connection.

In the third scenario, the embodiment of the present invention further includes: sending, by the SGW-C, the SGW-U1 a fifth notification message, where the fifth notification address includes the third connection address information of the DGW, and the third connection address information of the DGW is used by the SGW-U1 according to the third connection address information of the DGW The DGW forwards the data of the UE; correspondingly, the DGW receives data of the UE that is forwarded by the SGW-U1 that performs user plane data transmission for the UE, and according to the offload description, the received SGW The data of the UE forwarded by the U1 is offloaded. The third connection address information may be the third IP address and the third TEID of the DGW, or may be other address information, which is not specifically limited in this application.

Further, the SGW-C sends the acquired identifier information of the last data packet sent by the serving base station to the SGW-U1 to the DGW, and correspondingly, the DGW determines the identifier of the last data packet. And determining, after the data of the UE that is forwarded by the SGW-U1 is received, the data of the UE that is received by using the first communication connection is offloaded.

It should be noted that, in the embodiment of the present invention, the SGW-C may send the acquired identifier information of the first uplink data packet sent by the serving base station of the UE to the DGW to the DGW. Correspondingly, the DGW determines, according to the identifier information of the first uplink data packet, the information received by the first communication connection after the data of the UE that is forwarded by the SGW-U1 is received. The data of the UE is offloaded.

That is, the identification information of the last uplink data packet sent by the serving base station to the SGW-U1 and the identification information of the first uplink data packet sent by the serving base station to the DGW have the same function, and the role is And causing the DGW to first buffer the data of the UE that is received by using the first communication connection, and determining that the received data of the UE forwarded by the SGW-U1 is completed, and then connecting to the first communication The received data of the UE is offloaded. In addition to the identification information of the last uplink data packet sent by the serving base station to the SGW-U1 and the identification information of the first uplink data packet sent by the serving base station to the DGW, other functions that can serve the same function may also be used. Information, which is not limited in this application.

The data offloading method in this application is specifically described below in conjunction with specific embodiments.

Embodiment 2

The second embodiment of the present application corresponds to the first scenario, that is, after receiving the session start request message sent by the MME, the SGW-C selects the SGW-U for performing user plane data transmission for the UE according to the offload policy.

FIG. 3 is a schematic flowchart diagram of a data offloading method according to Embodiment 2 of the present application. As shown in FIG. 3, the method includes:

Step 301: The UE sends a PDN connection request message to the MME, where the PDN connection request carries the APN accessed by the UE, the PDN type of the PDN connection, the Protocol Configuration Options (PCO), and the request type ( Request Type).

Specifically, in the process of the UE accessing the network, the network registration is first required, and the UE is authenticated by acquiring the subscription information between the UE and the network. The subscription information may be stored in the home subscriber server (Home Subscriber Server). In the HSS for short, the above-mentioned network registration process of the UE is an attach procedure. After the attaching process, the UE has access to the network, but in order to perform data transmission with the network, that is, to complete the corresponding user service, it is also necessary to establish a PDN connection between the UE and the network by adding a PDN policy session. The HSS is a database for storing user subscription information, and the subscription information may include at least one of a user classification, a service usage authority, a service quality level, and a charging mode agreed by the user and the operator.

The UE sends a PDN connection request message to the MME to carry the APN accessed by the UE, and the APN can be used to indicate the PDN network used by the UE. Optionally, if the UE does not complete the attach procedure, the PDN connection request message may also be an attach request message, and the MME may perform authentication on the UE according to the UE subscription information saved in the HSS to ensure network security.

Step 302: The MME sends a session start request message to the SGW-C, where the session start request message includes a traffic off policy. The following uses the location information of the UE, the APN accessed by the UE, and the bearer QCI as an example.

Step 302a: After receiving the session start request message sent by the MME, the SGW-C selects a DGW for user plane data transmission according to the location information of the UE, the APN accessed by the UE, and the bearer QCI.

After the SGW-C selects the DGW, the offload description corresponding to the serving base station of the UE may be sent to the DGW.

In step 303, the SGW-C sends a session start request message to the PGW-U, where the session start request message includes the second IP address and the second TEID port of the DGW.

Step 303b: The SGW-C receives a session start response message returned by the PGW-U, where the session start response message includes an IP address and a TEID of the PGW-U.

Step 304: The SGW-C sends a session modification message to the DGW, where the session modification message includes the IP address and the TEID of the PGW-U, thereby establishing a second communication connection between the DGW and the PGW-U.

Subsequently, the PGW-U can send downlink data to the DGW.

In step 305, the SGW-C sends a session start response message to the MME.

Step 306: The MME sends a bearer setup request message to the serving base station of the UE.

Step 307: The serving base station of the UE sends an RRC connection reconfiguration message to the UE, and allocates an air interface resource for the air interface bearer.

Step 308: The serving base station of the UE receives an RRC connection reconfiguration success response message.

Optionally, the RRC connection reconfiguration message includes a mapping relationship between the service data of the UE and the air interface bearer, and an identifier of the air interface resource, where the identifier of the air interface resource is used to indicate that the UE is carried in the air interface. The air interface resource used when transmitting the service data. The serving base station of the UE may receive an RRC connection reconfiguration success response from the UE, and complete an RRC connection reconfiguration process.

Step 309: The serving base station of the UE sends a bearer setup response message to the MME, where the bearer setup response message includes the IP address and TEID of the serving base station.

Step 310: The MME sends a bearer modification request message to the SGW-C, where the bearer modification request message includes an IP address and a TEID of the serving base station of the UE.

Step 311: After receiving the bearer modification request message sent by the MME, the SGW-C sends a session modification message to the DGW, where the session modification message includes the IP address of the serving base station of the UE and the identifier information of the TEID, and the DGW is based on the serving base station. The IP address and the TEID and the first IP address of the DGW and the first TEID establish a first communication connection between the serving base station and the DGW.

Step 312: The SGW-C sends a bearer modification response message to the MME, and the MME may send a notification request message (Notify Request) to the HSS. After the HSS saves the related information, the MME may return a notification to the MME. Response message (Notify Response). The specific process can refer to the prior art, and details are not described herein again.

Then, the serving base station of the UE may send the uplink data of the UE to the DGW through the first communication connection, and the DGW offloads the uplink data of the UE according to the traffic distribution description. And, the DGW performs downlink data transmission of the UE by using the first communication connection.

After the UE accesses the network, the SGW-C selects the DGW for the UE to perform user plane data transmission according to the location information of the UE, the APN and the bearer QCI accessed by the UE, so that the DGW can describe according to the traffic distribution. The data of the UE is offloaded, so that when the gateway control and the forwarding are separated, the service data can be offloaded by the DGW for the traffic distribution and the local service deployment requirements, so that the UE can be configured according to the UE without being aware of the UE. The access requirement sends the service data to the local server and the PGW connected to the DGW at the same time, which not only maintains the user's usage habits, but also avoids routing all the large amount of service data to the PGW, reducing the delay of the service data and satisfying the mobile. The need for edge computing has less impact on the network.

Embodiment 3

The third embodiment of the present application corresponds to the foregoing scenario 2, that is, after receiving the bearer modification request message sent by the MME, the SGW-C selects a DGW for performing user plane data transmission for the UE.

FIG. 4 is a schematic flowchart diagram of a data offloading method according to Embodiment 3 of the present application. As shown in FIG. 4, the method includes:

Before the UE is not handed over, the uplink and downlink data of the UE are transmitted through the original serving base station, SGW-U1, and PGW-U. Specifically, the uplink data of the UE is sent by the original serving base station to the SGW-U1, and is sent by the SGW-U1 to the PGW-U; the downlink data of the UE is sent by the PGW-U to the SGW-U1, and is sent by the SGW-U. U1 is sent to the original serving base station.

In step 401, the UE is handed over to the target base station by the original serving base station. Specifically, the UE may be handed over to the target base station by the original serving base station due to the change of the location, or in other cases, the original serving base station may be handed over to the target base station, which is not specifically limited herein.

Step 402: The target base station sends a path switch request message to the MME, where the path conversion request is sent. The message includes a target-side evolved-Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) E-UTRAN Cell Global Identifier (ECGI) and a handover bearer;

Step 403: The MME sends a bearer modification request message to the SGW-C. The bearer modification request message includes location information of the target base station, and an IP address and TEID of the target base station, and then the SGW-C can target. The IP address and TEID of the base station are sent to the DGW.

Step 404: The SGW-C may select, according to the location information of the target base station and the bearer QCI and the APN of the UE, a DGW that performs user plane data transmission for the UE.

In this application, after the UE is handed over to the target base station, the UE triggers the MME to send a bearer modification request message to the SGW-C, and then triggers the SGW-C to select a DGW for the UE to perform user plane data transmission.

Step 405, the SGW-C sends a bearer modification request message to the PGW-U, where the bearer modification request message includes the second IP address and the second TEID of the DGW.

Step 405b: The PGW-U sends a bearer modification response message to the SGW-C, where the bearer modification response message includes an IP address and a TEID of the PGW-U.

Step 406: The SGW-C sends a session modification message to the DGW, where the session modification message includes an IP address and a TEID of the PGW-U, thereby establishing a second communication connection between the DGW and the PGW-U.

Step 407: The SGW-C sends a bearer modification response message to the MME, and sends the first IP address of the DGW and the first TEID to the MME.

Step 408: The MME sends a path switch response message to the target base station, where the path switch response message includes a first IP address of the DGW and a first TEID, thereby establishing a first communication connection between the DGW and the target base station.

Then, the target base station sends a release resource message to the original serving base station to inform the original serving base station that the UE has successfully switched, and instructs the original base station to release the resource.

Step 409, after receiving the uplink data packet sent by the target base station, the DGW reports the SGW-C.

Step 410: The SGW-C instructs the SGW-U1 to release the resources allocated for the original bearer. And end the session.

It should be noted that the first IP address and the first TEID in the third embodiment of the present application may be the same IP address and the same TEID in the second embodiment of the present application, or may or may not be The second IP address and the second TEID in the third embodiment of the present application may be the same IP address and the same TEID, or may be different. Wherein, "first" and "second" are only used to distinguish data interaction between DGW and PGW and data interaction with target base station in different embodiments based on different IP addresses and TEIDs, but for different embodiments No specific restrictions.

After the UE is handed over from the original serving base station to the target base station, the SGW-C is triggered to select a DGW for user plane data transmission, so that the DGW can split the data of the UE according to the traffic distribution description, thereby adopting gateway control. When the form of the forwarding is separated from the DGW, the service data can be offloaded to the DGW according to the access requirements of the UE. The local server and the PGW not only maintain the user's usage habits, but also avoid routing all the business data to the PGW, which reduces the delay of the business data, satisfies the requirements of the mobile edge computing, and has a greater impact on the network. small.

Embodiment 4

The fourth embodiment of the present application corresponds to the foregoing scenario 3, that is, after the SGW-C receives the offload request message sent by the SGW-U1 for performing user plane data transmission on the UE, the DGW is selected as the DGW for performing user plane data transmission.

FIG. 5 is a schematic flowchart diagram of a data offloading method according to Embodiment 4 of the present application. As shown in FIG. 5, the method includes:

Step 501: The SGW-U1 detects the destination address of the uplink data packet sent by the UE, determines, after performing the traffic distribution according to the traffic distribution description, buffers the offloaded data, and sends a traffic distribution request message to the SGW-C. The shunt description in SGW-U1 is obtained from SGW-C.

Step 502: After receiving the offloading request message, the SGW-C may select a DGW for performing user plane data transmission for the UE according to the location information of the UE and the bearer QCI and the APN of the UE.

Step 503, the SGW-C notifies the SGW-U1 to forward the data of the UE to the DGW;

Step 504a: The SGW-C sends a bearer modification request message to the PGW-U, where the bearer modification request message includes a second IP address and a second TEID of the DGW.

Step 504b: The SGW-C receives a bearer modification response message returned by the PGW, where the bearer modification response message includes an IP address and a TEID of the PGW-U.

Step 505: The SGW-C sends a session modification message to the DGW, where the session modification message includes an IP address and a TEID of the PGW-U, thereby establishing a second communication connection between the DGW and the PGW-U.

Subsequently, the PGW-U can send downlink data to the DGW.

Step 506: The SGW-C sends a bearer modification request message to the MME, where the bearer modification request message includes the first IP address and the first TEID of the DGW.

Step 507: The MME sends the first IP address of the DGW and the first TEID, and the offloading description corresponding to the serving base station to the serving base station of the UE, so as to establish a first communication connection between the DGW and the serving base station. The offload description includes destination address information of the data to be offloaded.

Step 508, the serving base station determines the identification information of the last uplink data packet sent to the SGW-U1 according to the destination address information of the data to be offloaded, and returns the identification information to the MME; wherein, the identifier of the last uplink data packet The information can be the serial number of the last upstream packet.

In step 509, the MME sends the sequence number of the last uplink data packet to the SGW-C.

In step 510, the SGW-C sends the sequence number of the last uplink data packet to the DGW. After obtaining the sequence number of the last uplink data packet, the DGW first buffers the data sent by the serving base station of the UE, and after determining that the data of the UE forwarded by the received SGW-U1 is completed, The data of the UE received by the first communication connection is offloaded.

It should be noted that, in the fourth embodiment of the present application, the SGW-C may determine whether to cancel the offload according to the change of the location of the UE. For example, if the UE changes its location and switches to a new target base station, the SGW-C After the data is offloaded, the uplink data of the UE may be merged into the original bearer of the original SGW-U, that is, the direction of the PGW-U is routed.

It should be noted that the first IP address and the first TEID in the fourth embodiment of the present application may be the same IP address and the same TEID as the first IP address and the first TEID in the third embodiment and the second embodiment. The second IP address and the second TEID in the fourth embodiment of the present application may be the same IP address and the same TEID as the second IP address and the second TEID in the third embodiment and the second embodiment. Or, it can be different. Wherein, "first" and "second" are only used to distinguish data interaction between DGW and PGW and data interaction with target eNB in one embodiment based on different IP addresses and TEIDs, but for different embodiments No specific restrictions.

According to the foregoing process, in the present application, the SGW-U1 detects the data of the UE according to the traffic distribution description, and after detecting the data, triggers the SGW-C to select the DGW for the UE to perform user plane data transmission, thereby The data is monitored in real time, and the data is shunted in time to respond to the UE's access to the distributed service in time; and the DGW splits the data of the UE according to the sequence number of the last uplink data packet, thereby realizing the determination of the received SGW. After the data splitting of the UE forwarded by the U2 is completed, the data of the UE received through the first communication connection is offloaded, thereby effectively avoiding the disorder of the serial number of the data packet.

For the foregoing method flow, the application further provides an SGW-C entity and a DGW, and the related operations of the SGW-C entity and the DGW in the foregoing method embodiments may be performed by these devices.

Based on the same concept, FIG. 6 is a schematic structural diagram of an SGW-C entity according to an embodiment of the present application. As shown in Figure 6, the SGW-C entity 600 includes: a selection module 601, a transceiver module 602;

The processing module 601 is configured to select, according to the offload policy, a distribution gateway DGW that performs user plane data transmission for the user equipment UE;

The transceiver module 602 is configured to send a first notification message to the DGW, where the first notification message includes connection address information of the serving base station of the UE, and send a second notification message to the serving base station, where the The second notification address includes the first connection address information of the DGW, where the service The connection address information of the base station and the first connection address information of the DGW are used to establish a first communication connection between the DGW and the serving base station, and send a traffic distribution description corresponding to the serving base station to the DGW. The split description is used by the DGW to offload data of the UE received through the first communication connection according to the offload description.

Optionally, the transceiver module 602 is further configured to:

Optionally, before the processing module 601 selects the distribution gateway DGW that performs user plane data transmission for the user equipment UE according to the offloading policy, the transceiver module 602 is further configured to:

Optionally, the processing module 601 selects a user for the user equipment UE according to the offload policy. Before the distribution gateway DGW of the data transmission, the transceiver module 602 is further configured to:

FIG. 7 is a schematic structural diagram of a DGW provided by the present application. As shown in FIG. 7, the DGW 700 includes: a transceiver module 701, a processing module 702;

The transceiver module 701 is configured to receive a first notification message that is sent by the SGW-C, where the first notification message includes connection address information of the serving base station of the UE.

The processing module 702 is configured to establish a first communication connection with the serving base station of the UE according to the connection address information of the serving base station of the UE and the first connection address information of the DGW;

The transceiver module 701 is further configured to receive a traffic distribution description corresponding to the serving base station of the UE that is sent by the SGW-C.

The processing module 702 is further configured to offload data of the UE that is received by using the first communications connection according to the offloading description.

The processing module 702 is specifically configured to:

Optionally, the transceiver module 701 is further configured to: receive a third notification message sent by the SGW-C, where the third notification message includes connection address information of the PGW-U;

The processing module 702 is further configured to: according to the connection address information of the PGW-U and the The second connection address information of the DGW establishes a second communication connection with the PGW-U.

Optionally, the processing module 702 is specifically configured to:

Optionally, the transceiver module 701 is further configured to: receive data of the UE that is forwarded by the SGW-U1 that performs user plane data transmission for the UE;

The processing module 702 is further configured to: perform offloading, according to the offloading description, the received data of the UE that is forwarded by the SGW-U1.

FIG. 8 is a schematic structural diagram of another SGW-C entity provided by the present application. As shown in Figure 8, the SGW-C entity 800 includes a communication interface 801, a processor 802, a memory 803, and a bus system 804;

The memory 803 is used to store a program. In particular, the program can include program code, the program code including computer operating instructions. The memory 803 may be a random access memory (RAM) or a non-volatile memory, such as at least one disk storage. Only one memory is shown in the figure, of course, the memory can also be set to a plurality as needed. Memory 803 can also be a memory in processor 802.

The memory 803 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof:

Operation instructions: include various operation instructions for implementing various operations.

Operating system: Includes a variety of system programs for implementing various basic services and handling hardware-based tasks.

The processor 802 controls the operation of the SGW-C entity 800, which may also be referred to as a CPU (Central Processing Unit). In a specific application, the various components of the SGW-C entity 800 are coupled together by a bus system 804, which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like. However, for clarity of description, various buses are labeled as bus system 804 in the figure. For ease of representation, only the schematic drawing is shown in FIG.

The methods disclosed herein above may be applied to processor 802 or implemented by processor 802. Processor 802 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 802 or an instruction in a form of software. The processor 802 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component. The methods, steps, and logical block diagrams disclosed in this application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in connection with the present application may be directly embodied by the execution of the hardware decoding processor or by a combination of hardware and software modules in the decoding processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 803, and the processor 802 reads the information in the memory 803 and performs the following steps in conjunction with its hardware:

Selecting, according to the offloading policy, a DGW for performing user plane data transmission for the user equipment UE;

Transmitting, by the communication interface 801, a first notification message to the DGW, where the first notification message includes connection address information of a serving base station of the UE; and sending a second notification message to the serving base station, where the The second notification address information includes the first connection address information of the DGW, and the connection address information of the serving base station and the first connection address information of the DGW are used to establish a first communication between the DGW and the serving base station. And transmitting, to the DGW, a traffic distribution description corresponding to the serving base station, where the traffic distribution description is used by the DGW to offload data of the UE that is received by using the first communication connection according to the traffic distribution description.

When the destination address information of the data of the UE that is received by the DGW through the first communication connection is the same as the destination address information of the data to be offloaded, the offload description is used by the DGW to pass the The data of the UE received by a communication connection is sent to the DGW connected Ground server.

Optionally, the communication interface 801 is further configured to:

Optionally, before the processor 802 selects the distribution gateway DGW that performs user plane data transmission for the user equipment UE according to the offload policy, the communication interface 801 is further configured to:

FIG. 9 is a schematic structural diagram of another DGW provided by the present application. As shown in FIG. 9, the DGW 900 includes a communication interface 901, a processor 902, a memory 903, and a bus system 904;

The memory 903 is used to store a program. In particular, the program can include program code, the program code including computer operating instructions. The memory 903 may be a random access memory (RAM) or a non-volatile memory such as at least one disk storage. Only one memory is shown in the figure, of course, the memory can also be set to a plurality as needed. Memory 903 can also be a memory in processor 902.

The memory 903 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof:

The processor 902 controls the operation of the DGW 900, which may also be referred to as a CPU (Central Processing Unit). In a specific application, the various components of the DGW 900 are coupled together by a bus system 904, which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like. However, for clarity of description, various buses are labeled as bus system 904 in the figure. For ease of representation, only the schematic drawing is shown in FIG.

The methods disclosed herein above may be applied to processor 902 or implemented by processor 902. Processor 902 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 902 or an instruction in a form of software. The processor 902 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component. The methods, steps, and logical block diagrams disclosed in this application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in connection with the present application may be directly embodied by the execution of the hardware decoding processor or by a combination of hardware and software modules in the decoding processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 903, and the processor 902 reads the letter in the memory 903. In conjunction with its hardware, perform the following steps:

Receiving, by the communication interface 901, a first notification message sent by the SGW-C, where the first notification message includes connection address information of the serving base station of the UE, and according to the connection address information of the serving base station of the UE Determining, by the DGW, first connection address information, establishing a first communication connection with the serving base station of the UE;

And receiving, by the communication interface 901, a traffic distribution description corresponding to the serving base station of the UE that is sent by the SGW-C, and performing, according to the traffic distribution description, data of the UE that is received by using the first communication connection. Diversion.

The processor 902 is specifically configured to:

Optionally, the communication interface 901 is further configured to: receive a third notification message that is sent by the SGW-C, where the third notification message includes connection address information of the PGW-U;

The processor 902 is further configured to establish a second communication connection with the PGW-U according to the connection address information of the PGW-U and the second connection address information of the DGW.

Optionally, the processor 902 is specifically configured to:

Optionally, the communication interface 901 is further configured to: receive data of the UE that is forwarded by the SGW-U1 that performs user plane data transmission for the UE;

The processor 902 is further configured to: perform offloading, according to the offloading description, the received data of the UE that is forwarded by the SGW-U1.

It can be seen from the above that in the present application, in the present application, the SGW-C selects the user plane for the UE. The DGW of the data transmission, and the data of the UE is offloaded by the DGW, so that when the gateway control and the forwarding are separated, the service data can be offloaded through the DGW for the traffic distribution and the local service deployment requirements, so that the UE is In the case of no sensation, the service data can be simultaneously sent to the local server and the PGW connected to the DGW according to the access requirement of the UE, which not only maintains the usage habit of the user, but also effectively avoids routing all the service data to the PGW, thereby reducing the number of service data. The delay of the business data satisfies the requirements of the mobile edge computing and has less impact on the network.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer usable memory channels (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of the method, apparatus (system), and computer program product according to the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. The computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine instruction for generating instructions executed by a processor of a computer or other programmable data processing device Means for implementing the functions specified in one or more flows of the flowchart or in a block or blocks of the flowchart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart Step.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present invention without departing from the scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

A data offloading method, comprising:

The serving gateway control plane SGW-C selects a distribution gateway DGW for user plane data transmission for the user equipment UE according to the offload policy;

Sending, by the SGW-C, a first notification message to the DGW, where the first notification message includes connection address information of a serving base station of the UE;

The SGW-C sends a second notification message to the serving base station, where the second notification message includes first connection address information of the DGW, connection address information of the serving base station, and a first connection of the DGW. The address information is used to establish a first communication connection between the DGW and the serving base station;

The SGW-C sends a traffic distribution description corresponding to the serving base station to the DGW, where the traffic distribution description is used by the DGW to perform data on the UE received through the first communication connection according to the traffic distribution description. Diversion.
The method according to claim 1, wherein the offload description includes destination address information of the data to be offloaded;

The offloading description is used by the DGW to offload data of the UE that is received by using the first communications connection according to the offloading description, including:

When the destination address information of the data of the UE that is received by the DGW through the first communication connection is the same as the destination address information of the data to be offloaded, the offload description is used by the DGW to pass the The data of the UE received by a communication connection is sent to the local server connected to the DGW.
The method of claim 2, wherein the method further comprises:

The SGW-C sends a third notification message to the DGW, where the third notification message includes connection address information of the packet data network gateway user plane PGW-U;

The SGW-C sends a fourth notification message to the PGW-U, where the fourth notification message includes second connection address information of the DGW, connection address information of the PGW-U, and the DGW. The second connection address information is used to establish a second communication connection between the DGW and the PGW-U.
The method according to claim 3, wherein the offloading description is used by the DGW to offload data of the UE that is received by using the first communication connection according to the offloading description, including:

When the destination address information of the data of the UE that is received by the DGW through the first communication connection is different from the destination address information of the data to be offloaded, the offload description is used by the DGW to pass the The data of the UE received by the first communication connection is sent to the PGW-U.
The method according to claim 4, wherein the connection address information of the serving base station of the UE is an IP address of the serving base station of the UE and a tunnel endpoint identifier TEID;

The first connection address information of the DGW is the first IP address and the first TEID of the DGW;

The second connection address information of the DGW is a second IP address and a second TEID of the DGW;

The connection address information of the PGW-U is an IP address and a TEID of the PGW-U.
The method according to any one of claims 1 to 5, wherein the offloading policy includes attribute information of the UE, identification information of a serving base station of the UE, and an access point accessed by the UE. Any one or any combination of the name APN and the bearer quality of service QoS information.
The method according to claim 6, wherein before the SGW-C selects the DGW for the UE to perform user plane data transmission, the method further includes:

The SGW-C receives a session start request message sent by the MME; the session start request message includes the offload policy.
The method according to claim 6, wherein before the SGW-C selects the DGW for the UE to perform user plane data transmission, the method further includes:

The SGW-C receives the bearer modification request message sent by the MME, where the bearer modification request message includes the traffic off policy.
The method according to claim 6, wherein before the SGW-C selects the DGW for the UE to perform user plane data transmission, the method further includes:

The SGW-C receives the shunt sent by the SGW-U1 for performing user plane data transmission on the UE The request message is used to request the SGW-C to select a DGW for user plane data transmission for the UE.
The method according to claim 9, wherein after the SGW-C selects the DGW for the UE to perform user plane data transmission, the method further includes:

The SGW-C sends a fifth notification message to the SGW-U1, where the fifth notification message includes third connection address information of the DGW, and the third connection address information of the DGW is used by the SGW- U1 forwarding data of the UE to the DGW according to the third connection address information of the DGW;

The offloading description is further used by the DGW to offload the received data of the UE that is forwarded by the SGW-U1 according to the offloading description.
The method of claim 10, further comprising:

Sending, by the SGW-C, the identifier information of the last data packet sent by the serving base station to the SGW-U1 to the DGW, where the identifier information of the last data packet is used by the DGW to determine After the received data of the UE forwarded by the SGW-U1 is completed, the data of the UE received through the first communication connection is offloaded.
The method according to any one of claims 1 to 11, wherein before the SGW-C sends the traffic distribution description corresponding to the serving base station to the DGW, the method further includes:

Receiving, by the SGW-C, a first general packet radio service technology GPRS tunneling protocol control plane GTP-C message sent by the mobility management entity MME, where the GTP-C message includes the offload description; or

The SGW-C receives the GTP-C message sent by the packet data gateway control plane PGW-C, where the GTP-C message includes the offload description; or

The SGW-C obtains the offload description from the service capability opening function SCEF.
A data offloading method, comprising:

Receiving, by the DGW, a first notification message sent by the SGW-C, where the first notification message includes connection address information of the serving base station of the UE;

The DGW is configured according to connection address information of the serving base station of the UE and the DGW Establishing a first communication connection with the serving base station of the UE by using the connection address information;

And the DGW receives the traffic distribution description corresponding to the serving base station of the UE that is sent by the SGW-C, and offloads the data of the UE that is received by using the first communication connection according to the traffic distribution description.
The method according to claim 13, wherein the offload description includes destination address information of the data to be offloaded;

The DGW, according to the offloading description, offloads data of the UE that is received by using the first communications connection, and includes:

Determining, by the DGW, destination address information of data of the UE received through the first communication connection;

Determining, by the DGW, the destination address information of the data of the UE that is received by the first communication connection is the same as the destination address information of the data to be offloaded, and sending the data of the UE to the local server.
The method of claim 13 wherein the method further comprises:

Receiving, by the DGW, a third notification message sent by the SGW-C, where the third notification message includes connection address information of the PGW-U;

The DGW establishes a second communication connection with the PGW-U according to the connection address information of the PGW-U and the second connection address information of the DGW.
The method according to claim 15, wherein the DGW offloads data of the UE received through the first communication connection according to the offloading description, including:

Determining, by the DGW, that the destination address information of the data of the UE that is received by the first communication connection is different from the destination address information of the data to be offloaded, and sending the data of the UE to the PGW-U .
The method of any of claims 13-16, further comprising:

Receiving, by the DGW, data of the UE that is forwarded by the SGW-U1 that performs user plane data transmission on the UE;

Determining, by the DGW, the UE that is forwarded by the received SGW-U1 according to the offload description The data is shunted.
The method of claim 17 further comprising:

Obtaining, by the DGW, identifier information of a last data packet sent by the serving base station of the UE to the SGW-U1;

Determining, according to the identification information of the last data packet, the DGW, after the data of the UE that is forwarded by the SGW-U1 is received, the UE receives the UE that is received through the first communication connection. The data is shunted.
A service gateway control plane SGW-C entity, comprising:

a processor, configured to select, according to the offload policy, a distribution gateway DGW that performs user plane data transmission for the user equipment UE;

a communication interface, configured to send a first notification message to the DGW, where the first notification message includes connection address information of a serving base station of the UE; and send a second notification message to the serving base station, where the second The notification message includes first connection address information of the DGW, and the connection address information of the serving base station and the first connection address information of the DGW are used to establish a first communication connection between the DGW and the serving base station. And sending, to the DGW, a traffic distribution description corresponding to the serving base station, where the traffic distribution description is used by the DGW to offload data of the UE received through the first communication connection according to the traffic distribution description.
The SGW-C entity according to claim 19, wherein the offload description includes destination address information of the data to be offloaded;

The offloading description is used by the DGW to offload data of the UE that is received by using the first communications connection according to the offloading description, including:

When the destination address information of the data of the UE that is received by the DGW through the first communication connection is the same as the destination address information of the data to be offloaded, the offload description is used by the DGW to pass the The data of the UE received by a communication connection is sent to the local server connected to the DGW.
The SGW-C entity according to claim 20, wherein the communication interface is further configured to:

Sending, to the DGW, a third notification message, where the third notification message includes connection address information of a packet data network gateway user plane PGW-U; and sending a fourth notification message to the PGW-U, the fourth The notification message includes second connection address information of the DGW, and the connection address information of the PGW-U and the second connection address information of the DGW are used to establish a second between the DGW and the PGW-U Communication connection.
The SGW-C entity according to claim 21, wherein the offload description is used by the DGW to offload data of the UE received through the first communication connection according to the offload description, including :

When the destination address information of the data of the UE that is received by the DGW through the first communication connection is different from the destination address information of the data to be offloaded, the offload description is used by the DGW to pass the The data of the UE received by the first communication connection is sent to the PGW-U.
The SGW-C entity according to claim 19, wherein before the processor selects the distribution gateway DGW for user plane data transmission for the user equipment UE according to the offloading policy, the communication interface is further configured to:

Receiving a session start request message sent by the MME; the session start request message includes the offload policy.
The SGW-C entity according to claim 19, wherein before the processor selects the distribution gateway DGW for user plane data transmission for the user equipment UE according to the offloading policy, the communication interface is further configured to:

Receiving a bearer modification request message sent by the MME; the bearer modification request message includes the traffic off policy.
The SGW-C entity according to claim 19, wherein before the processor selects the distribution gateway DGW for user plane data transmission for the user equipment UE according to the offloading policy, the communication interface is further configured to:

Receiving a offload request message sent by the SGW-U1 for user plane data transmission of the UE; the offload request message is used to request the SGW-C to select a DGW for user plane data transmission for the UE.
A distribution gateway DGW, comprising:

a communication interface, configured to receive a first notification message sent by the SGW-C, where the first notification message includes connection address information of the serving base station of the UE;

a processor, configured to establish a first communication connection with the serving base station of the UE according to the connection address information of the serving base station of the UE and the first connection address information of the DGW;

The communication interface is further configured to receive a traffic distribution description corresponding to the serving base station of the UE that is sent by the SGW-C;

The processor is further configured to offload data of the UE received through the first communication connection according to the offload description.
The DGW according to claim 26, wherein the offload description includes destination address information of the data to be offloaded;

The processor is specifically configured to:

Obtaining destination address information of data of the UE received through the first communication connection;

After determining that the destination address information of the data of the UE that is received by the first communication connection is the same as the destination address information of the data to be offloaded, the data of the UE is sent to the local server connected to the DGW.
The DGW according to claim 26, wherein the communication interface is further configured to: receive a third notification message sent by the SGW-C, where the third notification message includes connection address information of the PGW-U;

The processor is further configured to establish a second communication connection with the PGW-U according to the connection address information of the PGW-U and the second connection address information of the DGW.
The DGW of claim 28, wherein the processor is specifically configured to:

After determining that the destination address information of the data of the UE that is received by the first communication connection is different from the destination address information of the data to be offloaded, the data of the UE is sent to the PGW-U.
The DGW according to any one of claims 26 to 29, wherein the communication interface is further configured to: receive the UE forwarded by the SGW-U1 for user plane data transmission of the UE The data;

The processor is further configured to: offload, according to the offload description, the data of the UE that is forwarded by the received SGW-U1.