WO2013007133A1 - Procédé et système pour gérer un chemin de réacheminement de paquet, et élément de réseau - Google Patents

Procédé et système pour gérer un chemin de réacheminement de paquet, et élément de réseau Download PDF

Info

Publication number
WO2013007133A1
WO2013007133A1 PCT/CN2012/075722 CN2012075722W WO2013007133A1 WO 2013007133 A1 WO2013007133 A1 WO 2013007133A1 CN 2012075722 W CN2012075722 W CN 2012075722W WO 2013007133 A1 WO2013007133 A1 WO 2013007133A1
Authority
WO
WIPO (PCT)
Prior art keywords
mag
access gateway
node
address
mobile access
Prior art date
Application number
PCT/CN2012/075722
Other languages
English (en)
Chinese (zh)
Inventor
刘娟
骆文
孙默
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013007133A1 publication Critical patent/WO2013007133A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0019—Control or signalling for completing the hand-off for data sessions of end-to-end connection adapted for mobile IP [MIP]

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a packet forwarding path management method, system, and network element (including a mobile access gateway (MAG) and a mapping server).
  • MAG mobile access gateway
  • mapping server a mapping server
  • the ⁇ protocol is a network-based mobility management protocol.
  • the mobile node (MN) does not need to participate in any IP mobile-related signaling procedure.
  • the mobile entity in the network tracks the mobile node's mobility and initiates the mobile signaling process. Set the required routing status.
  • the core functional entities in the PMIPv6 domain are the Local Mobility Anchor (LMA) and the Mobile Access Gateway (MAG).
  • LMA Local Mobility Anchor
  • MAG Mobile Access Gateway
  • the local mobility anchor is responsible for maintaining the reachability status of the mobile node and logically anchoring the mobile node's home network prefix.
  • the LMA accepts any packet sent to the mobile node by any node within the proxy mobile IPv6 domain or outside the domain.
  • the mobile access gateway is responsible for managing the mobility related signaling of the MN, tracking the movement of the mobile node in the access network, receiving any packets sent by the mobile node to the correspondent node and transmitting to the local mobility anchor via the bidirectional tunnel.
  • the data transmission path between the MN and the CN (Correspondent Node) in PMIPv6 is attached to the MAG1, and the CN is attached to the MAG2.
  • the packet sent by the MN to the CN first arrives at the MAGI.
  • the MAG1 tunnels the packet and sends the packet to the LMA through the tunnel between the MAG1 and the LMA.
  • the LMA decapsulates the packet and repackages the packet through the LMA and
  • the tunnel between MAG2 is sent to MAG2.
  • MAG2 forwards it to the CN.
  • the CN sends the message to the MN in the same way.
  • the technical problem to be solved by the present invention is to provide a packet forwarding path management method, a network element, and a system to solve the problem that the LAM becomes a bottleneck of traffic forwarding.
  • the present invention provides a packet forwarding path management method, where the method includes:
  • the first mobile access gateway (MAG) sends an address query request to the mapping server, where the node information of the peer node (CN) is carried;
  • the mapping server receives the address query request, queries the binding cache table, and acquires the mobile access gateway information of the CN corresponding to the node information of the CN, where the mobile access gateway information of the CN points to the second MAG;
  • the mapping server After the mapping server sends an address query response message to the first MAG, or after forwarding the address query request to the second MAG, the second MAG sends an address query response message to the first MAG, where the query
  • the response message carries the mobile access gateway information of the CN; the first MAG receives the address query response message.
  • the method further includes: the first MAG receiving and buffering the first message sent by a mobile node (MN); a first transmission tunnel of the second MAG, and forwarding the first packet by using the first transmission tunnel.
  • MN mobile node
  • the method further includes: receiving, by the first MAG, a first packet sent by a mobile node (MN), where a destination address of the first packet is the CN The home address; the address query request further includes the first message; after the mapping server queries the mobile access gateway information of the CN, directly forwards the first text to the second MAG or passes the The address query message forwards the first message to the second MAG.
  • MN mobile node
  • the mapping server queries the mobile access gateway information of the CN, directly forwards the first text to the second MAG or passes the The address query message forwards the first message to the second MAG.
  • the address query request further carries the node information of the MN and the mobile access gateway information; after receiving the address query request message, the second MAG establishes a location according to the mobile access gateway information of the MN. a second transmission tunnel of the first MAG, and storing a mapping relationship between the node information of the MN and the mobile access gateway information.
  • the method further includes: The first MAG saves a mapping relationship between the node information of the CN and the mobile access gateway information; the first MAG forwards the received first packet to the outer tunnel address according to the mapping relationship, and the CN Mobile access gateway information.
  • the second MAG After receiving the encapsulated first message, the second MAG establishes a second transmission tunnel to the first MAG according to the mobile access gateway information of the MN, and saves the node information of the MN. Mapping relationship with mobile access gateway information.
  • the binding cache table includes a plurality of binding cache entries, where the binding cache entry is generated when the corresponding MN is registered, and the process of registering the MN includes:
  • the mapping server After receiving the proxy binding update message, the mapping server allocates a home network prefix to the MN, and creates a binding cache entry to save the saved binding relationship to the MN's home network prefix and proxy care-of address. Binding relationship
  • the mapping server replies to the MAG with a proxy binding acknowledgement message, where the message carries a home network prefix assigned to the MN;
  • the mobile access gateway After receiving the proxy binding acknowledgement message, the mobile access gateway sends a router advertisement message to the MN, where the message includes a home network prefix allocated by the mapping server to the MN and related parameters used by the MN to perform address configuration.
  • the MN After receiving the router advertisement message, the MN configures to generate a home address.
  • the present invention further provides a mobile access gateway (MAG), which is a mobile node MAG corresponding to a mobile node (MN), and the MAG includes:
  • the query request sending module is configured to: send an address query request to the mapping server, and carry node information of the peer node (CN);
  • the query response receiving module is configured to: receive an address query response message, and carry the mobile access gateway information of the CN.
  • the MAG further includes: a transmission tunnel establishing module, configured to: when the mobile node MAG is configured, establish a first transmission tunnel to the opposite node MAG corresponding to the CN according to the mobile access gateway information of the CN in the address query response message;
  • a transmission tunnel establishing module configured to: when the mobile node MAG is configured, establish a first transmission tunnel to the opposite node MAG corresponding to the CN according to the mobile access gateway information of the CN in the address query response message;
  • the message buffering module is configured to: when the mobile node is a MAG, cache the first message received before the first transmission tunnel is established;
  • the packet forwarding module is configured to: when the mobile node is a MAG, perform the first packet forwarding after the first transmission tunnel is established.
  • the address query request further carries the node information of the mobile node (MN) and the mobile access gateway information; as the peer node MAG corresponding to the CN, the MAG further includes:
  • the query request receiving module is configured to: receive an address query request sent by the mapping server; the query response sending module is configured to: according to the MN, the mobile access gateway information in the address query request to the mobile node MAG corresponding to the MN Send an address query response message.
  • the address query response message is sent by the mapping server or the peer node MAG.
  • the MAG further includes a mapping relationship maintenance module, as the mobile node MAG: the mapping relationship maintenance module is configured to: save the mapping of the CN node information and the mobile access gateway information according to the address query response message Relationship
  • the packet forwarding module is further configured to: encapsulate the outer tunnel address of the first packet before forwarding, the outer source address of the encapsulation is the mobile access gateway information of the MN, and the destination address is the movement of the CN Access gateway information.
  • the peer node is a MAG
  • the transmission tunnel establishing module is further configured to: establish a second transmission tunnel to the mobile node MAG corresponding to the MN according to the mobile access gateway information of the MN in the address query request.
  • the mapping relationship maintenance module is further configured to: save a mapping relationship between the node information of the MN and the mobile access gateway information according to the address query request.
  • the present invention also provides a mapping server, the mapping service
  • the device includes:
  • the query request receiving module is configured to: receive an address query request sent by the mobile node MAG corresponding to the mobile node, where the node information of the peer node (CN) is carried;
  • a binding relationship maintenance module configured to: save a binding relationship, and include a binding relationship between the node of the CN and the mobile access gateway information;
  • a binding relationship query module configured to: query the saved binding relationship, and obtain information about the mobile access gateway of the CN corresponding to the home node of the peer node;
  • a query request processing module configured to: send an address query response message to the mobile node MAG, carrying the mobile access gateway information of the CN; or, according to the mobile access gateway information of the CN, to the CN
  • the peer node MAG forwards the address query request.
  • the address query request further carries a first message, and the destination address of the first message is node information of the CN.
  • the mapping server further includes a packet forwarding module, configured to: forward the first packet to the peer node MAG according to the mobile access gateway information of the CN.
  • a packet forwarding module configured to: forward the first packet to the peer node MAG according to the mobile access gateway information of the CN.
  • mapping server further includes:
  • a proxy binding update message receiving module configured to: receive a proxy binding update message sent by a mobile node (MN) mobile access gateway (MAG);
  • MN mobile node
  • MAG mobile access gateway
  • the home network prefix allocation module is configured to: assign a home network prefix to the MN; a proxy binding confirmation message sending module, configured to: reply a proxy binding confirmation message to the mobile node MAG, where the message carries the hometown assigned to the MN Network prefix
  • the binding relationship saved by the binding relationship maintenance module is a binding relationship between the home network prefix and the proxy care-of address of the MN saved according to the allocated home network prefix and the proxy binding update message.
  • the present invention also provides a message forwarding path management system including the mobile access gateway (MAG) as described above.
  • MAG mobile access gateway
  • the system further comprises the above mapping server.
  • a packet forwarding path management method, a network element, and a system are attached by a mobile node (MN) according to an embodiment of the present invention.
  • the mobile access gateway (MAG) queries the mobile access gateway information of the correspondent node (CN) to implement packet forwarding between the MN and the CN through the two mobile access gateways, thereby solving the traffic forwarding bottleneck caused by the LMA. problem.
  • Figure 1 is a proxy mobile IPv6 packet forwarding path diagram
  • FIG. 2 is a structural diagram of a packet forwarding system according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a mobile node registration according to Embodiment 1 of the present invention.
  • FIG. 4 is a flowchart of a packet forwarding method according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of a packet forwarding method according to Embodiment 3 of the present invention.
  • FIG. 6 is a flowchart of a packet forwarding method according to Embodiment 4 of the present invention.
  • FIG. 7 is a flowchart of a packet forwarding method provided in Embodiment 5 of the present invention.
  • FIG. 8 is a schematic diagram of a packet forwarding path management method according to the present invention.
  • FIG. 9 to FIG. 11 are schematic diagrams showing the structure of a module of a mobile access gateway according to the present invention.
  • FIG. 12 is a schematic structural diagram of a module of an embodiment of a mapping server according to the present invention.
  • the embodiment of the present invention is applied to a scenario in which a mobile node (MN) and a correspondent node (CN) are attached to different mobile access gateways, and the proxy mobile IPv6 protocol provides a route when the MN and the CN are attached to the same mobile access gateway. Optimization mechanism.
  • MN mobile node
  • CN correspondent node
  • FIG. 2 is a structural diagram of a packet forwarding system according to an embodiment of the present invention, where:
  • the mapping server in the present invention is a control plane entity, receives a proxy binding update message from the mobile access gateway, and saves a mapping relationship between the mobile node home network prefix and the proxy care-of address; assigns a home network prefix to the mobile node; Receiving an address query request message from the mobile access gateway, performing corresponding processing according to whether the first message is carried in the message; and sending an address query response message to the mobile access gateway sending the address query request message.
  • the first mobile access gateway receives the first packet sent by the mobile node to the opposite node, sends an address query message to the mapping server, and queries the proxy care-of address of the opposite node.
  • the mobile access gateway optimizes the data forwarding path between the MN and the CN according to the obtained proxy care-of address of the opposite node.
  • the address query message is constructed in two cases:
  • the first mobile access gateway does not need to store the first packet, and after the mapping server receives the address query message carrying the first packet, the mapping packet is forwarded in the next step;
  • the first mobile access gateway needs to store the first packet, and the first packet is encapsulated and sent to the second mobile access gateway by using the care-of address queried by the mapping server.
  • the present invention implements mobility management by introducing a mapping server and using a plane structure in which the control plane is separated from the bearer plane.
  • the control plane mapping server is responsible for the registration and location management of the mobile node, which is equivalent to a location database.
  • the bearer plane mobile access gateway transmits the data packets between the mobile node and the communication node by performing location query on the mapping server.
  • the node information in the present invention is information for indicating which mobile node or the opposite node is, and may be an identifier (ID) of the mobile node or the opposite node, a home address, or a home network prefix. And the combination of the two pieces of information or the three pieces of information; the mobile access gateway information of the present invention is used to indicate which MAG is the information of the MAG attached to the mobile node or the peer node, and may be the MAG.
  • the address may also be a proxy care-of address (CoA) allocated by the MAG for the mobile node (MN) and the correspondent node (CN), or may be a combination of the address of the MAG and the CoA.
  • CoA proxy care-of address
  • the node information is specifically represented by what information, and the information of the mobile access gateway information is specifically determined by the specific application scenario or the information that may be obtained by the corresponding network element. This is not the focus of the present invention, and the present invention does not limit this.
  • the detailed description of the embodiments is merely illustrative and should not be construed as limiting.
  • the packet forwarding path management method of the present invention is as shown in FIG. 8.
  • the method includes:
  • Step 801 The first mobile access gateway (MAG) sends an address query request to the mapping server, where the node information of the opposite node (CN) is carried;
  • the node information is an identifier (ID), a home address, and/or a home network prefix. Which one or the other information is carried as the node information, so that the specific binding relationship saved in the mapping server can be found according to the node information in the query request;
  • Step 802 The mapping server receives the address query request, queries the binding cache table, and obtains the mobile access gateway information of the CN, where the mobile access gateway information of the CN points to the second MAG;
  • Step 803 After the mapping server sends an address query response message to the first MAG, or after forwarding the address query request to the second MAG, the second MAG sends an address query response message to the first MAG.
  • the query response message carries the mobile access gateway information of the CN;
  • the mobile access gateway information of the CN is an address of the second MAG or the second MAG is the
  • Step 804 The first MAG receives the address query response message.
  • the above steps 801 to 804 mainly focus on how the first MAG obtains the proxy handover address of the opposite node.
  • the method before the sending, by the first MAG, the address query request, the method further includes: the first MAG receiving and buffering the first packet sent by a mobile node (MN); a first transmission tunnel of the second MAG, and performing the first packet forwarding by using the first transmission tunnel.
  • MN mobile node
  • the method further includes: receiving, by the first MAG, a first packet sent by a mobile node (MN), where a destination address of the first packet is The home address of the CN; the address query request further carries the first message; after the mapping server queries the proxy care-of address of the CN, directly forwards the first message to the second MAG or passes the The address query message forwards the first message to the second MAG. See Example 4 and Example 5 for details.
  • MN mobile node
  • the address query request further carries the node information of the MN and the mobile access gateway information, where the mobile access gateway information is an address of the first MAG, or the first MAG is allocated to the MN.
  • the second MAG After the second MAG receives the address query request message, the second MAG establishes a second transmission tunnel to the first MAG according to the mobile access gateway information of the MN, and
  • the method further includes: the first MAG saves a mapping relationship between the node information of the CN and the mobile access gateway information;
  • the mapping relationship encapsulates the received first packet with the outer tunnel address and the address is the mobile access gateway information of the CN. See Embodiments 2 and 3 for details.
  • the second MAG after receiving the encapsulated first packet, the second MAG establishes a second transmission tunnel to the first MAG according to the mobile access gateway information of the MN, and saves the node of the MN.
  • the mapping relationship between information and mobile access gateway information See Example 2 and Example 4 for details.
  • the binding cache table in the mapping server includes a plurality of binding cache entries, and the binding cache entries are generated when the corresponding MN is registered.
  • FIG. 3 it is a mobile node registration process provided by Embodiment 1 of the present invention. Includes the following steps:
  • Step 300 When the MN is attached to the mobile access gateway, the mobile access gateway acquires the MN-ID, obtains the configuration file of the MN from the AAA server, performs an authentication operation on the MN according to the configuration file, and determines whether the mobile device can provide the mobile device with the MN. Sex management services.
  • Step 301 The MN sends a router request message to the attached mobile access gateway, requesting to obtain the prefix of the current visited network (ie, the home network prefix), to configure the IP address of the MN (ie, the home address), and the request message carries the identifier of the MN. (ID).
  • the prefix of the current visited network ie, the home network prefix
  • the IP address of the MN ie, the home address
  • steps 301 and 302 have no strict sequence, and the router request message can be sent at any time after the MN is attached.
  • Step 302 After the mobile access gateway authenticates the MN, construct a proxy binding update message.
  • Step 303 After receiving the proxy binding update message, the mapping server allocates a home network prefix to the MN, and creates a binding cache entry (BCE: Binding Cache Entry, BCE) to save the binding of the MN home network prefix and the proxy care-of address. relationship.
  • BCE Binding Cache Entry
  • Step 304 The mapping server replies to the mobile access gateway with a proxy binding acknowledgement message, where the message carries the home network prefix assigned to the MN.
  • Step 305 After receiving the proxy binding acknowledgement message, the mobile access gateway creates a Binding Update List (BUL) for the MN to record information about the binding update message sent by the MN. And sending a router advertisement message to the MN, where the message includes a home network prefix assigned by the mapping server to the mobile node and related parameters used by the MN for address configuration.
  • BUL Binding Update List
  • Step 306 After receiving the router advertisement message, the mobile node configures its interface address according to the configuration mode indicated in the message, that is, the stateful or stateless address configuration mode. After the address configuration succeeds, the MN obtains the hometown originating from the home network prefix. address.
  • the above embodiment of the present invention registers the mobile node on the mapping server by the mobile access gateway, and the mapping server allocates the home network prefix to the mobile node, and the mobile node configures the home address accordingly.
  • the mapping server stores location information of all mobile nodes in the administrative domain, so that different mobile nodes can perform location query when communicating with each other.
  • the mapping server stores the binding relationship between the home network prefix and the proxy care-of address.
  • the purpose of the MN registration is to store the binding relationship between the node information of the MN and the mobile access gateway information in the mapping server.
  • the mapping server may also use the identifier (ID) of the MN carrying the PBU message as the node information in the binding relationship, or the MN may feed back the configured home address to the mapping server.
  • the node information in the relationship is determined.
  • the mapping server can also use the address of the mobile access gateway carried in the PBU message as the mobile access gateway information in the binding relationship.
  • the embodiment of the present invention provides a method for packet forwarding to optimize the data forwarding path between the MN and the CN. After the first packet is forwarded, the subsequent data packet is directly forwarded through the tunnel between the MAGs.
  • the first mobile access gateway ie, the MAG attached to the mobile node, the present invention
  • the mobile node also stores the first message sent by the mobile node to the opposite node; and obtains the proxy care-of address of the opposite node by sending an address query message to the mapping server (the proxy care-of address points to the MAG attached to the peer node, The MAG also becomes the peer node MAG), and the query message carries the node information of the opposite node; the transmission tunnel of the first mobile access gateway to the second mobile access gateway is established according to the query result; the first stored by the established tunnel The packet is sent to the second mobile access gateway, and finally forwarded to the opposite node. Subsequent messages are forwarded directly through the tunnel between the mobile access gateways.
  • a flow chart of a packet forwarding method according to Embodiment 2 of the present invention includes the following steps:
  • Step 400 The mobile node MN sends the first message to the opposite node CN.
  • the destination address of the first message is CN's home address (HoA), and the source address is the home address of the MN.
  • Step 401 After receiving the first packet, the first mobile access gateway uses the node information of the CN as an index to query the mapping routing table to obtain the mobile access gateway information of the CN (which may be a proxy care-of address (Proxy-CoA), or may be The address of the mobile access gateway is shown in the figure as Proxy-CoA. The following example is used. If the call is missed, the first packet is cached.
  • Proxy-CoA proxy care-of address
  • the first mobile access gateway uses the HoA as the index or the HNP as the index to be queried, which is determined according to the specific content of the mapping of the mapping routing table, which is not limited by the present invention.
  • Step 402 The first mobile access gateway sends an address query request message to the mapping server to query the proxy care-of address of the CN, where the query request message carries the CN node information, which may be a home address (HoA) or a home network prefix (HNP).
  • HoA home address
  • HNP home network prefix
  • Step 403 After receiving the address query request message, the mapping server queries the BCE to obtain the proxy care-of address of the CN by using the home network prefix of the CN as an index, and the mapping server sends an address query response message to the first mobile access gateway, where the message carries the CN. Agent transfer address.
  • Step 404 creating a mapping routing table.
  • the first mobile access gateway After receiving the address query response message of the mapping server, the first mobile access gateway extracts the proxy care-of address of the CN, establishes a mapping routing table locally, and saves the mapping relationship between the CN node information and the mobile access gateway information, and the mapping relationship may also be It is saved in the original binding update list of the first mobile access gateway.
  • step 405 a tunnel is established.
  • the first mobile access gateway establishes a unidirectional tunnel to the second mobile access gateway according to the proxy care-of address of the CN (also becomes the first transport tunnel in the present invention).
  • step 406 the first message is sent.
  • the first mobile access gateway tunnel encapsulates the first packet stored in step 401 according to the established mapping routing table: the source address of the outer IP header is the mobile access gateway information of the MN (for example, the proxy care-of address, or the first The address of a mobile access gateway, the destination address is the mobile access gateway information of the CN (such as the proxy care-of address or the address of the second MAG); the source address of the inner-layer IP header is the node information of the MN, and the destination address is the CN Node information.
  • the first mobile access gateway sends the encapsulated first message to the second mobile access gateway.
  • Step 407 The second mobile access gateway receives the first message sent by the first mobile access gateway through the tunnel, learns the node information of the MN and the mobile access gateway information, establishes a mapping routing table locally, and saves the node information and the mobile of the MN.
  • the mapping relationship between the access gateway information and the mapping relationship may also be saved in the original binding update list of the second mobile access gateway.
  • Step 408 The second mobile access gateway strips the outer tunnel header of the packet, and forwards the first packet to the second packet.
  • Step 409 The second mobile access gateway establishes a unidirectional tunnel to the first mobile access gateway according to the learned proxy care-of address of the MN (in combination with the unidirectional tunnel established in step 405 (the invention also becomes the first transmission). Tunnel), the two-way tunnel between the first mobile access gateway and the second mobile access gateway is successfully established).
  • Step 410 to step 412 subsequent packet forwarding.
  • the mapping routing table established by the first mobile access gateway stores the mapping relationship between the node information of the CN and the mobile access gateway information;
  • the mapping routing table established by the second mobile access gateway stores the node of the MN. Mapping relationship between information and mobile access gateway information; a two-way tunnel is established between the first mobile access gateway and the second mobile access gateway.
  • the subsequent data packets between the MN and the CN are forwarded through the bidirectional tunnel between the mobile access gateways.
  • the local mapping routing table is first searched according to the destination address of the packet, and then The packet is encapsulated according to the information of the mobile access gateway corresponding to the destination address, and the encapsulated packet is sent to the mobile access gateway of the other party through the tunnel. Finally, the mobile access gateway decapsulates the packet. Forward to the peer node.
  • the mobile access gateway stores the first packet, obtains the mobile access gateway information of the peer node from the mapping server, encapsulates the first packet, and sends the packet to the peer mobile access gateway.
  • the mobile access gateway optimizes the forwarding path of subsequent data packets between the MN and the CN by creating a mapping routing table.
  • the first mobile access gateway stores the first message sent by the mobile node to the opposite node; the proxy forwarding address of the opposite node is obtained by sending an address query message to the mapping server, and the query message carries the peer node.
  • Node information, and node information of the MN mobile access gateway information of the MN; establishing a transmission tunnel of the first mobile access gateway to the second mobile access gateway according to the query result; sending the first packet stored by establishing a good tunnel
  • the second mobile access gateway is forwarded to the opposite node. Subsequent messages are forwarded directly through the tunnel between the mobile access gateways.
  • FIG. 5 it is a flowchart of a packet forwarding method according to Embodiment 3 of the present invention. Includes the following steps:
  • Step 500 The mobile node MN sends the first packet to the opposite node CN.
  • the destination address of the first message is the home address of CN, and the source address is the home address of the MN.
  • Step 501 After receiving the first packet, the first mobile access gateway uses the home information of the CN as an index to query the mapping routing table to obtain the proxy care-of address of the CN. If not, the first mobile access gateway stores the first packet.
  • Step 502 The first mobile access gateway sends an address query request message to the mapping server to query the proxy care-of address of the CN, and the query request message carries the node information of the CN, the node information of the MN, and the mobile access gateway information.
  • Step 503 After receiving the address query request message, the mapping server queries the BCE to obtain the proxy care-of address of the CN by using the home network prefix of the CN as an index, and forwards the message to the second mobile access gateway.
  • Step 504 After receiving the address query request message, the second mobile access gateway extracts the node information of the MN and the mobile access gateway information in the message, and establishes a mapping routing table, and saves the mapping between the node information of the MN and the information of the mobile access gateway. Relationship, the mapping relationship may also be saved in the original binding update list of the second mobile access gateway.
  • Step 505 establishing a tunnel. Establish a one-way tunnel to the first mobile access gateway,
  • Step 506 The second mobile access gateway returns an address query response message to the first mobile access gateway, where the message carries the proxy care-of address of the CN.
  • Step 507 creating a mapping routing table.
  • the first mobile access gateway After receiving the address query response message of the second mobile access gateway, the first mobile access gateway extracts the mobile access gateway information of the CN, establishes a mapping routing table locally, and saves the mapping relationship between the CN node information and the mobile access gateway information. The mapping relationship may also be saved in the original binding update list of the first mobile access gateway.
  • Step 508 establishing a tunnel.
  • the first mobile access gateway establishes a unidirectional tunnel to the second mobile access gateway according to the mobile access gateway information of the CN (in combination with the unidirectional tunnel established in step 505, the first mobile access gateway and the second mobile access The two-way tunnel between the gateways was successfully established).
  • Step 509 The first mobile access gateway tunnels the first packet stored in step 501 according to the established mapping routing table: the source address of the outer IP header is the mobile access gateway information of the MN, and the destination address is CN. Mobile access gateway information; the source address of the inner layer IP header is the home address of the MN, and the destination address is the home address of the CN. The first mobile access gateway sends the encapsulated first message to the second mobile access gateway.
  • Step 510 After receiving the first packet sent by the first mobile access gateway through the tunnel, the second mobile access gateway strips the outer tunnel header of the data packet and forwards the first packet to the CN.
  • Steps 511 to 513 are the same as steps 410 to 412, and will not be described again.
  • the foregoing embodiment of the present invention uses the mobile access gateway to store the first packet, obtains the mobile access gateway information of the peer node from the peer mobile access gateway, encapsulates the first packet, and sends the packet to the peer mobile access gateway to avoid
  • PMIPv6 the packet transmission delay caused by the fixed anchor point needs to be shortened, the forwarding path is shortened, and the communication efficiency is improved.
  • the mobile access gateway optimizes the forwarding path of subsequent data packets between the MN and the CN by creating a mapping routing table.
  • the first mobile access gateway receives the first message sent by the mobile node to the opposite node; and obtains the proxy care-of address of the opposite node by sending an address query message to the mapping server, where the query message carries the peer node The home information, and the first message; the mapping server extracts the first message from the query message, sends it to the second mobile access gateway, and finally forwards it to the peer node. Subsequent messages are forwarded directly through the tunnel between the mobile access gateways.
  • Step 600 The mobile node MN sends the first message to the opposite node CN.
  • the destination address of the first message is the home address of CN, and the source address is the home address of the MN.
  • Step 601 After receiving the first packet, the first mobile access gateway uses the home information of the CN as an index to query the mapping routing table to obtain the proxy care-of address of the CN, and the first mobile access gateway sends an address query request message to the mapping server.
  • the message carries the first message and CN's hometown information.
  • Step 602 After receiving the address query request message, the mapping server queries the BCE to obtain the proxy care-of address of the CN, and extracts the first packet in the message to be forwarded to the second mobile access gateway.
  • Step 603 The second mobile access gateway receives the first packet forwarded from the mapping server, and forwards the packet to the CN.
  • Step 604 The mapping server performs the step 602, and sends an address query response message to the first mobile access gateway, where the message carries the proxy care-of address of the CN.
  • Step 605 Create a mapping routing table and establish a tunnel.
  • the first mobile access gateway After receiving the address query response message of the mapping server, the first mobile access gateway extracts the proxy care-of address of the CN, establishes a mapping routing table locally, and saves the mapping relationship between the CN node information and the mobile access gateway information, and the mapping relationship may also be The first mobile access gateway establishes a one-way tunnel to the second mobile access gateway according to the proxy care-of address of the CN.
  • the second mobile access gateway learns the node information of the MN and the mobile access gateway information, establishes a mapping routing table, and saves the node information of the MN and the mobile access gateway. The mapping relationship of information.
  • Step 609 The second mobile access gateway establishes a unidirectional tunnel to the first mobile access gateway according to the learned proxy care-of address of the MN (in combination with the unidirectional tunnel established in step 605, the first mobile access gateway and the first The two-way tunnel between the mobile access gateways is successfully established.
  • Steps 610 to 612 are the same as steps 410 to 412, and are not described again.
  • the foregoing embodiment of the present invention carries the first message by mapping the server in the address query request message.
  • the first mobile access gateway receives the first packet sent by the mobile node to the opposite node, and obtains the care-of address of the opposite node by sending an address query message to the mapping server, where the query message carries the node of the opposite node.
  • FIG. 7 is a flowchart of a packet forwarding method according to Embodiment 5 of the present invention. Includes the following steps:
  • Step 700 The mobile node MN sends the first packet to the opposite node CN.
  • the destination address of the first message is the home address of CN, and the source address is the home address of the MN.
  • Step 701 After receiving the first message, the first mobile access gateway uses the home information of the CN as an index to query the mapping routing table to obtain the proxy care-of address of the CN, and the first mobile access gateway sends an address query request message to the mapping server.
  • the message carries the first message, CN's home network information, MN node information, and mobile access gateway information.
  • Step 702 After receiving the address query request message, the mapping server queries the BCE to obtain the proxy care-of address of the CN by using the home network prefix of the CN as an index, and forwards the message to the second mobile access gateway.
  • Step 703 Forward the first packet, and create a mapping routing table. After receiving the address query request message, the second mobile access gateway extracts the first message in the message and forwards it to the CN.
  • Extracting the node information of the MN and the mobile access gateway information address in the message, establishing a mapping routing table locally, and preserving the mapping relationship between the node information of the MN and the mobile access gateway information, and the mapping relationship may also be saved in the second mobile access gateway.
  • the original bindings are updated in the list.
  • Step 704 establishing a tunnel.
  • the second mobile access gateway according to the mobile access gateway information of the MN,
  • Step 705 The second mobile access gateway sends an address query response message to the first mobile access gateway, where the message carries the mobile access gateway information of the CN.
  • Step 706 Create a mapping routing table and establish a tunnel.
  • the first mobile access gateway After receiving the address query response message of the second mobile access gateway, the first mobile access gateway extracts the mobile access gateway information of the CN, establishes a mapping routing table locally, and saves the mapping relationship between the CN node information and the mobile access gateway information.
  • the mapping relationship may also be saved in the original binding update list of the first mobile access gateway; the first mobile access gateway establishes a one-way tunnel to the second mobile access gateway according to the proxy care-of address of the CN (in combination step
  • the unidirectional tunnel established in 704, the bidirectional tunnel between the first mobile access gateway and the second mobile access gateway is successfully established).
  • Steps 707 to 709 are the same as steps 410 to 412, and are not described again.
  • the mobile access gateway extracts the first packet from the message by using the first packet in the address query request message, and forwards the response message to the mobile access gateway that sends the address query request message to establish an address query response message.
  • the subsequent data packets of the MN and the CN are forwarded through the tunnel, which avoids the packet transmission delay caused by the need to traverse the fixed anchor point in the PMIPv6, shortens the forwarding path, and improves the communication efficiency.
  • the functional modules of the mobile access gateway (MAG) of the present invention that are particularly relevant to the present invention are described below.
  • the MAG when the MAG is the mobile node MAG corresponding to the mobile node (MN), that is, the first MAG, the MAG includes:
  • the query request sending module is configured to send an address query request to the mapping server, where the node information of the peer node (CN) is carried, where the node information is a CN identifier, a home address, or a home network prefix;
  • a query response receiving module configured to receive an address query response message, where the mobile access gateway information of the CN is carried, where the mobile access gateway information is an address of a peer node MAG or a proxy that the peer node allocates for the CN Handover address.
  • the MAG further includes:
  • a transmission tunnel establishing module as the mobile node MAG, configured to establish a first transmission tunnel to the opposite node MAG corresponding to the CN according to the mobile access gateway information of the CN in the address query response message;
  • the message buffering module is configured to: when the mobile node MAG is used, buffering the first message received before the first transmission tunnel is established;
  • the packet forwarding module When the packet forwarding module is used as the mobile node MAG, the first packet is forwarded after the first transmission tunnel is established.
  • the address query request further carries node information of the mobile node (MN) and mobile access gateway information, where the mobile access gateway information of the MN is mobile
  • MN mobile node
  • the mobile access gateway information of the MN is mobile
  • the address of the node MAG, or the proxy care-of address assigned by the mobile node MAG to the MN; as shown in FIG. 11, on the basis of the MAG shown in FIG. 9, when the MAG is the peer node MAG corresponding to the CN Also includes:
  • a query request receiving module configured to receive an address query request sent by the mapping server, and a query response sending module, configured to send an address query to the mobile node MAG corresponding to the MN according to the mobile access gateway information of the MN in the address query request Reply message.
  • the address query response message is sent by the mapping server or the peer node MAG.
  • the MAG further includes a mapping relationship maintenance module. And the mapping relationship between the node information of the CN and the mobile access gateway information is saved according to the address query response message; the packet forwarding module is further configured to: before the forwarding The packet encapsulates the outer tunnel address, and the outer source address of the encapsulation is the mobile access gateway information of the MN, and the destination address is the mobile access gateway information of the CN.
  • the transmission tunnel establishing module is further configured to establish, according to the mobile access gateway information of the MN in the address query request, a second transmission tunnel to the mobile node MAG corresponding to the MN;
  • the mapping relationship maintenance module is further configured to save a mapping relationship between the node information of the MN and the mobile access gateway information according to the address query request.
  • the mapping server of the present invention includes:
  • the query request receiving module is configured to receive an address query request sent by the mobile node MAG corresponding to the mobile node, where the node information of the peer node (CN) is carried;
  • a binding relationship maintenance module configured to save a binding relationship, where the binding relationship between the node information of the CN and the mobile access gateway information is included;
  • a binding relationship query module configured to query the saved binding relationship, and obtain information about the mobile access gateway corresponding to the node information of the peer node;
  • a query request processing module configured to send an address query response message to the mobile node MAG, where the mobile access gateway information of the CN is carried; or, to correspond to the CN according to the mobile access gateway information of the CN
  • the peer node MAG forwards the address query request.
  • the address query request further carries a first message
  • the destination address of the first document is node information of the CN.
  • the mapping server further includes a packet forwarding module, configured to access the gateway information according to the CN Forwarding the first packet to the peer node MAG.
  • the mapping server further includes:
  • a proxy binding update message receiving module configured to receive a proxy binding update message sent by a mobile node (MN) mobile access gateway (MAG);
  • MN mobile node
  • MAG mobile access gateway
  • a home network prefix allocation module configured to allocate a home network prefix to the MN
  • a proxy binding confirmation message sending module configured to reply to the mobile node MAG with a proxy binding acknowledgement message, where the message carries a home network prefix assigned to the MN;
  • the binding relationship saved in the binding relationship maintenance module is a binding relationship between the home network prefix and the proxy care-of address of the MN determined according to the allocated home network prefix and the proxy binding update message.
  • the present invention also provides a message forwarding path management system including a mobile access gateway (MAG) and a mapping server as described above.
  • MAG mobile access gateway
  • the home network prefix is the first 64 bits of the home address.
  • the network element such as the mapping server or MAG that knows the home address can infer the corresponding home network prefix.
  • the technical solution provided by the embodiment of the present invention has the following advantages: By querying the mapping server for the mobile access gateway information of the opposite node, the packet does not need to be forwarded through a fixed anchor point, thereby optimizing data forwarding. The path reduces the data transmission delay.
  • the packet forwarding path management method, the network element, and the system in the embodiment of the present invention query the mobile access gateway information of the opposite node (CN) through the mobile access gateway (MAG) attached by the mobile node (MN), thereby
  • the mobile access gateway implements packet forwarding between the MN and the CN to solve the traffic forwarding bottleneck caused by the LMA.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention se rapporte à un procédé adapté pour gérer un chemin de réacheminement de paquet. Le procédé selon l'invention comprend les étapes suivantes : une première passerelle d'accès mobile (MAG, Mobile Access Gateway) envoie une requête d'interrogation d'adresse à un serveur de mappage, la requête d'interrogation d'adresse contenant des informations de nœud relatives à un nœud correspondant (CN, Correspondent Node) ; le serveur de mappage reçoit la requête d'interrogation d'adresse, il interroge une table de mise en antémémoire d'association, et il obtient des informations MAG du CN qui correspondent aux informations de nœud du CN, les informations MAG du CN faisant référence à une seconde MAG ; ensuite, le serveur de mappage envoie un message de réponse à la requête d'interrogation d'adresse, directement à la première MAG, ou après que la requête d'interrogation d'adresse a été réacheminée vers la seconde MAG ; et la seconde MAG envoie le message de réponse à la requête d'interrogation d'adresse à la première MAG, le message de réponse à la requête contenant les informations MAG du CN ; enfin, la première MAG reçoit le message de réponse à la requête d'interrogation d'adresse.
PCT/CN2012/075722 2011-07-08 2012-05-18 Procédé et système pour gérer un chemin de réacheminement de paquet, et élément de réseau WO2013007133A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110191461.8 2011-07-08
CN201110191461.8A CN102868991B (zh) 2011-07-08 2011-07-08 报文转发路径管理方法、系统及网元

Publications (1)

Publication Number Publication Date
WO2013007133A1 true WO2013007133A1 (fr) 2013-01-17

Family

ID=47447535

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/075722 WO2013007133A1 (fr) 2011-07-08 2012-05-18 Procédé et système pour gérer un chemin de réacheminement de paquet, et élément de réseau

Country Status (2)

Country Link
CN (1) CN102868991B (fr)
WO (1) WO2013007133A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112995043A (zh) * 2019-12-17 2021-06-18 阿里巴巴集团控股有限公司 无线网格网络中的信息处理方法、装置及电子设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112165725B (zh) 2016-06-15 2024-03-19 华为技术有限公司 报文处理的方法及设备
CN108990000A (zh) * 2017-05-31 2018-12-11 华为技术有限公司 一种群组移动管理方法及相关设备
CN107483628B (zh) * 2017-09-12 2020-09-18 网宿科技股份有限公司 基于dpdk的单向代理方法及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101136847A (zh) * 2006-08-31 2008-03-05 华为技术有限公司 一种本地移动性管理网络的报文路由方法和系统
CN101772193A (zh) * 2008-12-26 2010-07-07 华为技术有限公司 一种本地路由优化的方法、系统和移动接入网关
CN101940014A (zh) * 2008-02-04 2011-01-05 爱立信电话股份有限公司 用于提供路由优化的方法和设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101136847A (zh) * 2006-08-31 2008-03-05 华为技术有限公司 一种本地移动性管理网络的报文路由方法和系统
CN101940014A (zh) * 2008-02-04 2011-01-05 爱立信电话股份有限公司 用于提供路由优化的方法和设备
CN101772193A (zh) * 2008-12-26 2010-07-07 华为技术有限公司 一种本地路由优化的方法、系统和移动接入网关

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112995043A (zh) * 2019-12-17 2021-06-18 阿里巴巴集团控股有限公司 无线网格网络中的信息处理方法、装置及电子设备
CN112995043B (zh) * 2019-12-17 2023-04-25 阿里巴巴集团控股有限公司 无线网格网络中的信息处理方法、装置及电子设备

Also Published As

Publication number Publication date
CN102868991A (zh) 2013-01-09
CN102868991B (zh) 2018-03-20

Similar Documents

Publication Publication Date Title
JP3568852B2 (ja) 有線サブネットにアクセスする無線デバイス用にパケット経路設定アドレスを割り当てる方法及び装置
JP4794520B2 (ja) ネットワーク主導型移動管理プロトコルにおける通信経路を最適化するシステム、アクセスゲートウェイ、ホームエージェント、およびプログラム
JP3573266B2 (ja) デスティネーションノードへパケットを配信する経路設定パスを確立する方法
EP1011241B1 (fr) Accés sans fil à des réseaux de paquets
JP3573265B2 (ja) パケットを無線デバイスに送信するステップ
US9049653B2 (en) Handover in core-edge separation technology in wireless communications
EP1011243A1 (fr) Schéma de mobilité locale à phase unique pour l'accès sans fil à des réseaux à commutation de paquets
US9049625B2 (en) Route switching methods and systems
Shin et al. Distributed mobility management for efficient video delivery over all-IP mobile networks: Competing approaches
JPWO2009057296A1 (ja) 移動端末及びネットワークノード並びにパケット転送管理ノード
US8824353B2 (en) Mobility route optimization in a network having distributed local mobility anchors
WO2007131404A1 (fr) Méthode et dispositif de transfert rapide
WO2013007133A1 (fr) Procédé et système pour gérer un chemin de réacheminement de paquet, et élément de réseau
JP2006005607A (ja) ネットワークシステムおよび移動ルータ
WO2013007131A1 (fr) Procédé de gestion de la mobilité et passerelle d'accès mobile
JP2008541516A (ja) ＩＰｖ６通信相手ノード及び移動ＩＰｖ６ノード間の通信方法、並びに通信相手ノードプロキシーゲートウエイ
WO2013026297A1 (fr) Procédé et système d'implémentation de transfert intercellulaire, et routeur de sortie de tunnellisation source
WO2013034003A1 (fr) Procédé et système de gestion de mobilité
US20090147759A1 (en) Method and apparatus for supporting mobility of node using layer 2/layer 3 addresses
WO2011050679A1 (fr) Réseau de communication et procédé d'accès de terminal mis en oeuvre grâce à une infrastructure de réseau wimax
WO2013083037A1 (fr) Procédé et système de traitement de paquet de mise à jour, serveur de mappage et nœud mobile
WO2013007129A1 (fr) Procédé de traitement de réexpédition de paquets, élément et système de réseau
WO2013044688A1 (fr) Procédé de communication et système de communication pour un nœud qui est en itinérance dans des domaines pmip
WO2013064053A1 (fr) Procédé et système de gestion de politique dans un mouvement en continu
WO2014000175A1 (fr) Procédé, appareil et système de routage de session

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12810543

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12810543

Country of ref document: EP

Kind code of ref document: A1