WO2012088866A1

WO2012088866A1 - Method and system for establishing data path

Info

Publication number: WO2012088866A1
Application number: PCT/CN2011/076779
Authority: WO
Inventors: 王志海; 涂杨巍; 周娜; 霍玉臻
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-12-27
Filing date: 2011-07-01
Publication date: 2012-07-05
Also published as: CN102572772B; CN102572772A

Abstract

Disclosed is a method for establishing a data path. The method comprises: when receiving a data packet sent by an opposite end to a terminal, an opposite access gateway sending a position information query request to a home server; or when receiving a data packet sent by an opposite end to a terminal, an opposite access gateway sending the data packet to a home server; when receiving the position information query request or the data packet, the home server matching connection information of the opposite end with connection information registered by the terminal, and if the two pieces of information do not match, notifying the terminal of establishing a bearer based on the connection information of the opposite end; and the terminal establishing a bearer according to the connection information of the opposite end and a new terminal access gateway, and registering new position information and connection information on the home server. Also disclosed are a system for establishing a data path and a home server.

Description

Method and system for establishing data path

TECHNICAL FIELD The present invention relates to the field of communications, and more particularly to a method and system for reverse triggering a data path.

BACKGROUND With the increasing demand of mobile terminals and the widespread application of wireless technologies, the flattening trend of the telecommunication network structure becomes more and more obvious, resulting in localization of various content servers and localization of mobile gateways, but currently used. Centralized mobile IP is not able to meet the problems caused by these flattenings. These factors have greatly promoted the research process of distributed mobility management systems. Figure 1, Figure 2 and Figure 3 briefly introduce the network architecture of distributed mobility management: Distributed Mobility Management (DMM) system, also known as dynamic mobility management system, whose main network elements can be abstracted For two major categories, one is a mobile node and the other is a gateway, as shown in Figure 1. The mobile node can be specifically divided into a Correspondence Node (CN) and a Mobile Node (MN). The gateway can be specifically divided into a peer access gateway, a terminal access gateway, and a home server. The peer access gateway is generally the local mobility anchor closest to the peer node, and provides a mobile routing function for the packet sent from the peer node to the terminal node, so that the packet can be forwarded to the correct terminal node. The terminal access gateway is generally the local mobility anchor closest to the terminal node, and receives the message from the peer access gateway and ensures that it can be forwarded to the terminal node. The home server is located in the home network of the terminal and can be located at the local mobility anchor point. It can assign a home address (Ho A) to the terminal node, manage the location information of the mobile node, and interact with the peer end. Forward. The general packet interaction path is established as shown in Figure 2. The peer node first sends the message to The peer access gateway, because it is the first packet, does not store the address information of the terminal access gateway on the peer access gateway. Therefore, the peer access gateway needs to forward the packet to the home server. After receiving the packet, the home server searches for the location information of the terminal and forwards the packet to the terminal access gateway according to the information, and the home server needs to send the address of the terminal access gateway that is found to be obtained to the peer access gateway. . After receiving the packet, the terminal access gateway forwards the packet to the terminal node. The forwarding path of subsequent packets, because the peer access gateway has obtained the address information of the terminal access gateway, it does not need to be forwarded to the home server, but is processed by direct forwarding. The terminal may move after the packet forwarding path is established. As a result, the packet forwarding path needs to be changed accordingly. The establishment manner is shown in Figure 3. The peer node sends a packet to the peer access gateway, and the peer access gateway forwards the packet according to the address of the original terminal access gateway stored on the peer. After receiving the packet, the original terminal access gateway finds that the terminal node has moved to the target terminal access gateway according to the context information stored thereon, so the original terminal access gateway needs to forward the packet according to the address of the target terminal access gateway. . After receiving the packet, the destination terminal access gateway forwards the packet to the corresponding terminal node. In an identity-based and location-separated network, the user's identity is globally unique, but the user's access method may be diverse. For example, users of the 3rd Generation Partnership Project (3GPP) can select different access point names (Access Point Names, ΑΡΝ) to access according to different applications, and for example, multi-mode terminals can select different ones. Wireless network to access. This may result in the terminal selecting a different access gateway to access the data. Some access gateways may be dedicated to certain services, such as a virtual private network (VPN) or an operator-defined service gateway. When the peer network actively sends data to the local terminal, the access gateway that the terminal currently registers with the home server will cause the gateway to be unavailable to the data sent by the peer end because of different service applications. In addition, when the peer network actively sends data to the local terminal, if the access mode (such as the wireless access mode) currently registered by the local terminal in the home server is not equal to the peer network, the quality of service may be caused. Service, QoS) can't be consistent end-to-end. In this way, even if the peer end and the terminal node are already registered in the network, the data path cannot be successfully established to perform packet exchange, or even if the data path is established, the packet forwarding efficiency is inefficient due to the access technology problem. And these have seriously affected the user experience of the network, and will definitely restrict this. The development of network technology.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a method and system for establishing a data path, which overcomes the inefficiency of packet forwarding in the prior art, thereby affecting the user experience of the network and the development of the network technology. . In order to solve the above problem, the present invention provides a method for establishing a data path, the method comprising: sending, by a peer access gateway, a location information query request to a home server when receiving a data message sent by the peer end to the terminal; or When receiving the data packet sent by the peer end to the terminal, the terminal access gateway sends the data packet to the home server; when the home server receives the location information query request or the data packet, The connection information of the peer end is matched with the connection information registered by the terminal, and if not, the terminal is notified to establish a bearer based on the connection information of the peer end; and the terminal connects to the new terminal according to the connection information of the peer end. The ingress gateway establishes a bearer, and registers new location information and connection information on the home server. In the above method, the connection information includes one or a combination of the following: domain name information, access type information, and quality of service information. The method further includes: sending, by the home server, address information of the new terminal access gateway to the peer access gateway. The method further includes: sending, by the peer access gateway, the data packet to the new terminal access gateway according to the address information of the new terminal access gateway. The method further includes: the home server transmitting the data packet to the new terminal access gateway. The method further includes: the peer access gateway forwarding, according to the address information of the new terminal access gateway, a subsequent data packet sent by the peer end to the terminal. In order to solve the above problem, the present invention further provides a system for establishing a data path, where the system includes a peer access gateway and a home server, where: the peer access gateway is configured to: receive the peer to send to When the data packet of the terminal is sent, the location information query request is sent to the home server; or, when the data message sent by the peer end to the terminal is received, the data packet is sent to the home server; When the location information query request or the data message is received, the connection information of the peer end is matched with the connection information registered by the terminal, and if not, the terminal is notified to establish connection information based on the peer end. Carrying; and receiving new location information and connection information registered by the terminal after establishing a bearer with the new terminal access gateway according to the connection information of the opposite end. In the above system, the connection information includes one or a combination of the following: domain name information, access type information, and quality of service information. In the above system, the home server is further configured to: send address information of the new terminal access gateway to the peer access gateway. In the above system, the peer access gateway is further configured to: send the data packet to the new terminal access gateway according to the address information of the new terminal access gateway. In the above system, the home server is further configured to: send the data packet to the new terminal access gateway. In the foregoing system, the peer access gateway is further configured to forward the subsequent data packet sent by the peer to the terminal according to the address information of the new terminal access gateway. In order to solve the above problem, the present invention further provides a home server, comprising: a receiving module, configured to: when receiving a data message sent by the peer access gateway to the terminal, sending the data message to the home server Or the location information query request; or, when receiving the data message sent by the peer access gateway to the terminal, the data message sent to the home server; and the receiving terminal according to the connection information of the peer end and the new After the terminal access gateway establishes the bearer, the registered new location information and connection information;

a matching module, configured to: when the location information query request or the data message is received, match the connection information of the peer end with the connection information registered by the terminal, and if not, notify the terminal to establish the pair based on the pair The bearer of the connection information at the end. In the foregoing home server, the connection information includes one or a combination of the following: domain name information, access type information, and quality of service information. The home server further includes: a sending module, configured to: send address information of the new terminal access gateway to the peer access gateway. The home server further includes: a sending module, configured to: send the data packet to the new terminal access gateway.

The invention establishes a data path by reverse triggering, and improves data packet forwarding efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an architecture of an existing DMM system; FIG. 2 is a schematic diagram of a general packet path establishment in an existing DMM system; FIG. 3 is a schematic diagram of a packet path establishment after a terminal moves in an existing DMM system; Embodiment 1 of the method for establishing a data path based on a domain name by reverse triggering; FIG. 5 is a second embodiment of a method for back-triggering a data path based on a domain name; FIG. 6 is a first embodiment of a method for establishing a data path based on an access type by using a reverse trigger; FIG. 7 is a second embodiment of a method for establishing a data path based on an access type by using a reverse trigger; Method Embodiment 1; and FIG. 9 is a second embodiment of a method for reverse triggering a data path based on Qos.

The embodiments of the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. The invention is not to be construed as limiting the invention. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The present invention is implemented by the following technical solution: When receiving the data packet sent by the peer end to the terminal, the peer access gateway sends a location information query request to the home server, where the location information query request carries the connection information of the peer end; When receiving the data packet sent by the peer end to the terminal, the terminal access gateway directly forwards the data packet to the home server; and when the home server receives the location information query request or the data packet, the terminal uses the terminal The identity information is used to query the terminal location information, and the connection information registered by the terminal is matched with the connection information of the peer end. If the connection is not matched, the home server uses the current terminal access gateway to trigger the terminal to use the connection information of the peer end to establish a bearer, and the terminal passes the pair. After the connection information of the terminal is established with the new terminal access gateway, new location information and connection information registration are performed on the new terminal access gateway and the home server. The home server sends the address information of the new terminal access gateway to the peer access gateway, so that the subsequent data packet can be forwarded by using the new data path, that is, the peer access gateway accesses the gateway or belongs according to the new terminal. The server will send the data packet to the new terminal access gateway, and the new terminal will connect. The connection information includes one or a combination of the following: domain name information, access type information, and

QoS information.

Referring to FIG. 4, the present invention solves the problem that the access gateway registered in the home server with the identity location registration function is unavailable to the peer end by the reverse triggering establishment of the data path. The specific implementation steps are as follows: Step 401 The terminal registers the location information and the domain name information on its original terminal access gateway and the home server. Step 402: The peer node sends a data packet to the terminal node, and the data packet is sent to the peer access gateway. Step 403: The peer access gateway queries the home server for the address of the access gateway of the terminal, and sends the domain name information of the peer end together. Step 404: The home server matches the domain name information of the peer end with the domain name information in the registration information of the terminal. Step 405: If the matching is unsuccessful, the home server may notify the terminal to initiate a bearer establishment procedure of the new domain name by using the gateway currently registered by the terminal (ie, the original terminal access gateway) or the signaling gateway. Step 406: The original terminal access gateway forwards the notification to trigger bearer establishment based on the domain name information of the peer end. Step 407: The terminal initiates a bearer establishment process based on the domain name information of the peer end, establishes a bearer with the new terminal access gateway, and registers the address information and the domain name information of the new bearer. Step 408: The home server sends the new terminal access gateway address to the peer access gateway. Step 409: The peer access gateway forwards the data packet according to the address of the new terminal access gateway, and finally reaches the terminal. Step 410: For subsequent data messages, the network will forward using the newly established data path. Referring to FIG. 5, the present invention solves the problem that the access gateway registered in the home server with the identity location registration function is unavailable to the peer end by the reverse triggering establishment of the data path. The specific implementation steps are as follows: Step 501: The terminal registers location information and domain name information on its original terminal access gateway and home server. Step 502: The peer node sends a data packet to the terminal node, and the data packet is sent to the peer access gateway. Step 503: The peer access gateway forwards the data sent by the peer end to the terminal to the home server. Step 504: The home server matches the domain name information of the peer end with the domain name information in the registration information of the terminal. Step 505: If the matching is unsuccessful, the home server notifies the terminal to initiate a bearer establishment procedure of the new domain name by using the gateway or the signaling gateway currently registered by the terminal. Step 506: The original terminal access gateway forwards the notification to trigger bearer establishment based on the domain name information of the peer end. Step 507: The terminal initiates a bearer establishment process, and registers the address information and the domain name information of the new bearer. Step 508: The home server sends the new terminal access gateway address to the peer access gateway. Step 509: The home server forwards the data packet sent by the peer end to the terminal to the new terminal access gateway. Step 510: The new terminal access gateway forwards the data packet to the terminal. Step 511: For subsequent data packets, the network will forward using the newly established data path.

Referring to FIG. 6, the present invention solves the access mode (such as the wireless access mode) and the peer network registered by the terminal in the home server having the identity location registration function by establishing a data path by reverse triggering. Embodiment 1 of the QoS problem that the QoS cannot be end-to-end is consistent. The specific implementation steps are as follows: Step 601: The terminal accesses the location information and the access type information and the access capability on the original terminal access gateway and the home server. Sign up. Step 602: The peer node sends a data packet to the terminal node, and the data packet is sent to the peer access gateway. Step 603: The peer access gateway queries the home server for the address of the access gateway of the terminal, and sends the access type information of the peer end together. Step 604: The home server matches the access type information of the peer end with the access type in the registration information of the terminal. Step 605: If the matching is unsuccessful, the home server may notify the terminal to initiate a bearer establishment procedure based on the access type of the peer end by using the gateway or the signaling gateway currently registered by the terminal. Step 606: The original terminal access gateway forwards the notification to trigger bearer establishment based on the access type of the peer end. Step 607: The terminal initiates a bearer establishment process, and registers address information and access information of the new bearer. Step 608: The home server sends the new terminal access gateway address to the peer access gateway. Step 609: The peer access gateway forwards the data packet according to the address of the new terminal access gateway, and finally reaches the terminal. Step 610: For subsequent data packets, the network will forward using the newly established data path.

Referring to FIG. 7, the present invention solves the problem that the access mode registered by the terminal in the home server having the identity location registration function (such as the wireless access mode) and the peer network are not QoS can be terminated by the reverse triggering establishment of the data path. The second embodiment of the method for maintaining consistency is implemented. The specific implementation steps are as follows: Step 701: The terminal registers the location information, the access type information, and the access capability on the original terminal access gateway and the home server. Step 702: The peer node sends a data packet to the terminal node, and the data packet is sent to the peer access gateway. Step 703: The peer access gateway forwards the data packet sent by the peer end to the terminal to the home server. Step 704: The home server matches the access type information of the peer end with the access type in the registration information of the terminal. Step 705: If the matching is unsuccessful, the home server may notify the terminal to initiate a bearer establishment process based on the access type of the peer end by using the currently registered gateway or the signaling gateway. Step 706: The original terminal access gateway forwards the notification to trigger bearer establishment based on the access type of the peer end. Step 707: The terminal initiates a bearer establishment process, and registers address information and access information. Step 708: The home server sends the new terminal access gateway address to the peer access gateway. Step 709: The home server forwards the data packet sent by the peer end to the terminal to the new terminal access gateway. Step 710: The new terminal access gateway forwards the data packet to the terminal. Step 711: For subsequent data packets, the network will forward using the newly established data path.

Referring to FIG. 8 , the present invention solves the problem that the access mode registered by the terminal in the home server having the identity location registration function (such as the wireless access mode) and the peer network are not QoS can be terminated by the reverse triggering establishment of the data path. The third embodiment of the method for maintaining the consistency problem is as follows: Step 801: The terminal registers the location information, the access type information, and the access capability on the original terminal access gateway and the home server. Step 802: The peer node sends a data packet to the terminal node, and the data packet is sent first. Send it to the peer access gateway. Step 803: The peer access gateway queries the home server for the address of the access gateway of the terminal, and sends the QoS information of the opposite end together. Step 804: The home server matches the QoS information of the peer end with the current QoS in the registration information of the terminal. Step 805: If the matching is unsuccessful, the home server may notify the terminal to initiate a bearer establishment procedure according to the QoS of the peer end by using the access gateway or the signaling gateway currently registered by the terminal. In addition, all access type information that can satisfy this QoS requirement also needs to be sent to the terminal. Step 806: The original terminal access gateway forwards the notification to trigger bearer establishment based on the QoS of the opposite end. Step 807: The terminal selects an access type according to the new QoS and all access type information that meets the QoS requirement, and initiates a bearer setup process according to the new QoS requirement, and performs address information, access information, and QoS information. registered. If the terminal does not register the current access type, the home server may first compare the peer QoS with the current QoS information of the terminal. If it can match, the home server needs to decide whether to trigger the new data path in reverse according to the local policy (for example, the same The QoS but different access types, whether to continue to use the current access type, or to completely match the QoS and access types to establish a new data path, this can be determined by the operator whether to let the user adjust. If the match is not matched, all the access type information that meets the requirements of the QoSs and the QoS information of the peer end in the user subscription information may be sent to the terminal, and the terminal selects a new bearer establishment according to the local policy. Step 808: The home server accesses the new terminal The gateway address is sent to the peer access gateway. If the original access technology is selected but the bearer is established based on the new QoS, the new terminal access gateway address is the original terminal access gateway address. Step 809, peer access The gateway forwards the data packet according to the address of the new terminal access gateway, and finally arrives. End of step 810, for subsequent data packets, the network using the newly established data path forwarding. Referring to FIG. 9 , the present invention solves the problem that the access mode registered by the terminal in the home server with the identity location registration function (such as the wireless access mode) and the peer network are not QoS can be reached by the reverse triggering establishment of the data path. The fourth embodiment of the method for maintaining the consistency problem is as follows: Step 901: The terminal registers the location information, the access type information, and the access capability on the original terminal access gateway and the home server. Step 902: The peer node sends a data packet to the terminal node, and the data packet is sent to the peer access gateway. Step 903: The peer access gateway forwards the data packet sent by the peer end to the terminal to the home server. Step 904: The home server sends the QoS information of the peer end and the current information in the registration information of the terminal.

QoS is matched. Step 905: If the matching is unsuccessful, the home server may notify the terminal to initiate a bearer establishment procedure according to the QoS of the peer end by using the currently registered gateway or the signaling gateway. In addition, all access type information industries that can meet this QoS requirement need to be sent to the terminal. Step 906: The original terminal access gateway forwards the notification to trigger bearer establishment based on the QoS of the opposite end. Step 907: The terminal selects an access type according to the new QoS and all access type information that meets the QoS requirement, and initiates a bearer setup process according to the new QoS requirement, and performs address information, access information, and QoS information. registered. Step 908: The home server sends the new terminal access gateway address to the peer access gateway. If the original access technology is selected but the bearer is established based on the new QoS, the new terminal access gateway address is the original terminal access gateway address. Step 909: The home server forwards the data packet sent by the peer end to the terminal to the new terminal access gateway. Step 910: The new terminal access gateway forwards the data packet to the terminal. Step 911, for subsequent data messages, the network will forward using the newly established data path. In the above embodiments, only the domain name information, the access type information, and the QoS information are separately matched. In other embodiments, two or three types of information may be matched at the same time, for example, the domain name information is simultaneously Matches with the access type information, and both match, and the match is passed. Otherwise, the terminal is triggered to establish a new bearer. For another example, the access type information and the QoS information are matched at the same time. The embodiment also provides a system for the reverse triggering of the data path, the system includes a peer access gateway, and a home server, where: the peer access gateway is configured to: receive data sent by the peer to the terminal Sending a location information query request to the home server, or sending the data packet to the home server when receiving the data message sent by the peer end to the terminal; the home server is configured to: receive When the location information query request or the data message is sent, the connection information of the peer end is matched with the connection information registered by the terminal, and if not, the terminal is notified to establish a bearer based on the connection information of the peer end; and receiving The new location information and connection information registered by the terminal after the bearer is established according to the connection information of the peer end and the new terminal access gateway. The connection information includes one or a combination of the following: domain name information, access type information, and quality of service information. The home server is further configured to: send address information of the new terminal access gateway to the peer access gateway. The peer access gateway is further configured to: send the data packet to the new terminal access gateway according to the address information of the new terminal access gateway. The home server is further configured to: send the data packet to the new terminal access gateway. The peer access gateway is further configured to forward the subsequent data packet sent by the peer end to the terminal according to the address information of the new terminal access gateway. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be executed by a computing device The program code is implemented so that they can be stored in the storage device by the computing device, or they can be separately fabricated into individual integrated circuit modules, or a plurality of modules or steps can be made into a single integrated circuit module. . Thus, the invention is not limited to any specific combination of hardware and software.

Industrial Applicability The present invention is to improve data packet forwarding efficiency.

Claims

Claim

A method for establishing a data path, the method comprising: sending, by a peer access gateway, a location information query request to a home server when receiving a data message sent by the peer end to the terminal; or receiving, by the peer access gateway When the data packet sent by the terminal is sent to the terminal, the data packet is sent to the home server; when the home server receives the location information query request or the data packet, the connection information of the peer end is The connection information of the terminal registration is matched, and if not, the terminal is notified to establish a bearer based on the connection information of the peer; and the terminal establishes a bearer according to the connection information of the peer with the new terminal access gateway. Register new location information and connection information on the home server.

The method according to claim 1, wherein the connection information comprises one or a combination of the following: domain name information, access type information, and quality of service information.

3. The method of claim 1, the method further comprising: the home server transmitting address information of the new terminal access gateway to the peer access gateway.

The method of claim 3, the method further includes: the peer access gateway transmitting the data packet to the new terminal access gateway according to the address information of the new terminal access gateway .

5. The method of claim 1, 2 or 3, the method further comprising: the home server transmitting the data message to the new terminal access gateway.

The method according to any one of claims 1 to 4, the method further comprising: sending, by the peer access gateway, the address information of the new terminal access gateway to the peer to the The subsequent data packets of the terminal are forwarded.

7. A system for establishing a data path, the system comprising a peer access gateway and a home server, wherein:

The peer access gateway is configured to: when receiving the data packet sent by the peer end to the terminal, send a location information query request to the home server; or, when receiving the data packet sent by the peer end to the terminal, The data packet is sent to the home server; the home server is configured to: when the location information query request or the data packet is received, match the connection information of the peer end with the connection information registered by the terminal. If not, the terminal is notified to establish a bearer based on the connection information of the peer; and the new location information and connection information registered by the terminal after establishing a bearer with the new terminal access gateway according to the connection information of the peer.

The system according to claim 7, wherein the connection information comprises one or a combination of the following: domain name information, access type information, and quality of service information.

The system of claim 7, wherein the home server is further configured to: send address information of the new terminal access gateway to the peer access gateway.

The system of claim 9, wherein the peer access gateway is further configured to: send the data packet to the new terminal access gateway according to address information of the new terminal access gateway.

The system according to any one of claims 7 to 9, wherein the home server is further configured to: send the data packet to the new terminal access gateway.

The system according to any one of claims 7 to 10, wherein the peer access gateway is further configured to: send the peer end to the terminal according to the address information of the new terminal access gateway Data packets are forwarded.

A home server, comprising: a receiving module, configured to: receive a location information query request sent by the peer access gateway to the home server when receiving the data packet sent by the peer end to the terminal; or Receiving a data message sent by the peer access gateway to the home server when receiving the data message sent by the peer end to the terminal; and the receiving terminal establishing a bearer with the new terminal access gateway according to the connection information of the peer end, New location information and connection information registered; and

a matching module, configured to: when the location information query request or the data message is received, match the connection information of the peer end with the connection information registered by the terminal, and if not, notify the terminal to establish the pair based on the pair The bearer of the connection information at the end.

The home server according to claim 13, wherein the connection information comprises one or a combination of the following: domain name information, access type information, and quality of service information.

The home server of claim 13, further comprising: a sending module, configured to: send address information of the new terminal access gateway to the peer access gateway.

The home server according to any one of claims 13 to 15, further comprising: a sending module, configured to: send the data message to the new terminal access gateway.