CN102202286B - Method for terminal access in heterogeneous network, and method and equipment for heterogeneous network switching - Google Patents
Method for terminal access in heterogeneous network, and method and equipment for heterogeneous network switching Download PDFInfo
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Abstract
The invention discloses a method for terminal access in a heterogeneous network, and a method and equipment for heterogeneous network switching. The method for terminal access in the heterogeneous network comprises the steps of: receiving a proxy binding notification message, wherein the proxy binding notification message carries an updated proxy binding record and is sent by a local mobility anchor, the updated proxy binding record comprises proxy binding information registered for the terminal by terminal-associated mobile access gateways; and establishing a data forwarding correlation between the terminal-associated mobile access gateways according to the proxy binding information and a forwarding correlation record stored in the terminal. In the embodiment of the invention, the terminal is connected to a plurality of mobile access gateways through a plurality of interfaces, the intercommunication of the plurality of interfaces is implemented through the proxy binding notification, so that the terminal can send and receive IP messages by using any of the interfaces to realize flexible and efficient multi-interface/multi-homing management.
Description
Technical field
The embodiment of the present invention relates to communication technical field, relates in particular to the method for terminal access in a kind of heterogeneous network, the method and apparatus that heterogeneous network switches.
Background technology
Mobile communication allows user can set up session or accept the session invitation from other people with other people in moving process, and can in moving process, keep the session of having set up.Mobile communication can be used multiple wireless technology, as global system for mobile communications (Global System for Mobile Communications; Be called for short: GSM), Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access; Be called for short: WCDMA), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access; Be called for short: Wimax) and WLAN (Wireless Local Area Networks; Be called for short: WLAN) etc., the various communication networks corresponding with various wireless technologys are development thereupon also.These networks, because used different wireless access, have also correspondingly been used the different network architectures, are commonly referred to heterogeneous network.
Internet Engineering task groups (the Internet Engineering Task Force; Be called for short: IETF) formulated Mobile Internet Protocol (Mobile Internet Protocol; Be called for short: MIP), MIP has the functions such as switching between many interfaces, many forwarding address, distinct interface, stream mobility (flow mobility).The condition that realizes MIP is that terminal is supported MIP, supports that the terminal of MIP can be to Care-of Address (Care-ofAddress; Be called for short: CoA) binding manages, by being arranged on the Care-of Address binding on home agent, binding logo, the traffic identifier of expansion, can realize each function of MIP.Due to MIP more complicated, in existing most terminal, support that MIP is more difficult, therefore, IETF has formulated again proxy-mobile IP (Proxy mobile IP; Be called for short: PMIP).PMIP can provide the function of MIP when terminal is not supported MIP by the network equipment, realize moving freely of terminal, keeps the continuity of session.
In using the heterogeneous network of PMIP, mobile node (Mobile Node; Be called for short: MN) by a plurality of interfaces, be connected to a plurality of Mobile Access Gateways (Mobile Access Gateway; Be called for short: MAG), and each MAG is home network prefix of interface assignment, and each interface can only be received and dispatched same network prefix, does not realize complete many ownership function.
In addition, in the heterogeneous network of existing use PMIP, during switching between the upper distinct interface of terminal MN, need to revise terminal IP stack and IP operation flow process, revise terminal IP stack and IP operation requirements of process and carry out one by one in each terminal, implementation procedure is complicated and difficult.
Summary of the invention
The invention provides the method and apparatus of terminal access in a kind of heterogeneous network, in order to solve a plurality of interfaces accesses of terminal in prior art while using the heterogeneous network of PMIP, do not realize the defect of complete many ownership function, realize between a plurality of interfaces and communicating with each other, make terminal can use any one interface to receive transmitting IP packet, realize flexible and efficient many interfaces/many ownership management.
On the one hand, provide the method for terminal access in a kind of heterogeneous network, having comprised:
Receive the agent binding notice message that carries the agent binding record after renewal that local mobile anchor point sends, the agent binding record after described renewal comprises the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration;
According to the forwarding associated record of described agent binding information and self preservation, the data retransmission of setting up between the Mobile Access Gateway that described terminal is relevant is associated.
On the other hand, provide the method for terminal access in a kind of heterogeneous network, having comprised:
To the relevant Mobile Access Gateway of described terminal, send the agent binding notice message of the agent binding record carrying after renewal, the agent binding record after described renewal comprises the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration.
On the other hand, provide a kind of Mobile Access Gateway, having comprised:
Notice receiver module, the agent binding notice message that carries the agent binding record after renewal sending for receiving local mobile anchor point, the agent binding record after described renewal comprises the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration;
Relating module, for the agent binding information receiving according to described notice receiver module and the forwarding associated record of self preserving, the data retransmission of setting up between the Mobile Access Gateway that described terminal is relevant is associated.
On the other hand, provide a kind of local mobile anchor point, having comprised:
Notice sending module, for send the agent binding notice message of the agent binding record carrying after renewal to the relevant Mobile Access Gateway of described terminal, the agent binding record after described renewal comprises the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration.
The method and apparatus of terminal access in heterogeneous network provided by the invention, when the agent binding record of the terminal of having preserved on local mobile anchor point occurs to upgrade, Mobile Access Gateway receives the agent binding notice message that carries the agent binding record after renewal that local mobile anchor point sends, the data retransmission that can set up between the Mobile Access Gateway that terminal is relevant according to agent binding information is wherein associated, when terminal is connected to a plurality of Mobile Access Gateway by a plurality of interfaces, by agent binding notice message, realize between a plurality of interfaces and communicating with each other, make terminal can use any one interface to receive transmitting IP packet, flexible and efficient many interfaces/many ownership management have been realized.
In addition, the method and apparatus that the embodiment of the present invention also provides a kind of heterogeneous network to switch, in order to solve terminal at the switching problem that uses the heterogeneous network of PMIP, in the situation that not revising terminal IP stack and IP operation flow process, realize the switching between terminal distinct interface.
On the one hand, a kind of method that provides heterogeneous network to switch, comprising:
New Mobile Access Gateway after switching sends agent binding update messages to local mobile anchor point, described agent binding update messages comprises IP address and the switching indication parameter of the new interface sign after terminal iidentification, switching, the new home network prefix that described new Mobile Access Gateway is described terminal distribution, described new Mobile Access Gateway, and described switching indication parameter is set to switch;
Data forwarding channel after described local mobile anchor point switches is set to point to after described new Mobile Access Gateway, and described new Mobile Access Gateway sends the follow-up described terminal receiving IP message repeating by new interface is to described local mobile anchor point; Or the described local mobile anchor point receiving sends to the IP message of described terminal to be transmitted to described terminal by new interface.
On the other hand, a kind of method that provides heterogeneous network to switch, comprising:
Receive the agent binding update messages that new Mobile Access Gateway sends, described agent binding update messages comprises the IP address of the new interface sign after terminal iidentification, switching, the new home network prefix that described new Mobile Access Gateway is described terminal distribution, described new Mobile Access Gateway and switches indication parameter;
If described switching indication parameter is set to switch, data forwarding channel corresponding to old home network prefix that old Mobile Access Gateway is described terminal distribution is set to point to described new Mobile Access Gateway.
On the other hand, a kind of method that provides heterogeneous network to switch, comprising:
Terminal detected and to network, send IP message by new Mobile Access Gateway;
The data forwarding channel of described terminal is set to point to described new mobile mobile gateway from pointing to old Mobile Access Gateway.
On the other hand, provide a kind of Mobile Access Gateway, comprising:
Sending module, for sending agent binding update messages to local mobile anchor point, described agent binding update messages comprises IP address and the switching indication parameter of the new interface sign after terminal iidentification, switching, the new home network prefix that the new Mobile Access Gateway after switching is described terminal distribution, described new Mobile Access Gateway, and described switching indication parameter is set to switch; Or for the data forwarding channel after switching at described local mobile anchor point, be set to point to after described new Mobile Access Gateway, the IP message repeating that the follow-up described terminal receiving is sent by new interface is to described local mobile anchor point; Maybe send to the IP message of described terminal to be transmitted to described terminal by new interface the described local mobile anchor point receiving.
On the other hand, provide a kind of local mobile anchor point, comprising:
Receiver module, the agent binding update messages sending for receiving new Mobile Access Gateway, described agent binding update messages comprises the IP address of the new interface sign after terminal iidentification, switching, the new home network prefix that described new Mobile Access Gateway is described terminal distribution, described new Mobile Access Gateway and switches indication parameter;
Module is set, if be set to switch for described switching indication parameter, data forwarding channel corresponding to old home network prefix that old Mobile Access Gateway is described terminal distribution is set to point to described new Mobile Access Gateway.
On the other hand, provide a kind of local mobile anchor point, comprising:
Detection module, for detection of sending IP message by new Mobile Access Gateway to network to terminal;
Module is set, and for according to the detection of described detection module, the data forwarding channel of described terminal is set to point to described new mobile mobile gateway from pointing to old Mobile Access Gateway.
The method and apparatus that the heterogeneous network that the embodiment of the present invention provides switches, new Mobile Access Gateway sends after agent binding update messages to local mobile anchor point, if switching indication parameter is wherein set to switch, local mobile anchor point can comprise that the data forwarding channel after switching is set to point to new Mobile Access Gateway, thereby the new Mobile Access Gateway and the new interface that realize from switching are carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 a is the flow chart of a kind of embodiment of method of terminal access in heterogeneous network of the present invention;
Fig. 1 b is the schematic diagram that in heterogeneous network of the present invention, a kind of embodiment of method of terminal access is applied to use the heterogeneous network of PMIP;
Fig. 1 c is the schematic diagram of a kind of embodiment medium priority of method of terminal access in heterogeneous network of the present invention;
Fig. 2 is the flow chart of another embodiment of method of terminal access in heterogeneous network of the present invention;
Fig. 3 is the flow chart of another embodiment of method of terminal access in heterogeneous network of the present invention;
Fig. 4 is the flow chart of a kind of embodiment of method of heterogeneous network switching of the present invention;
Fig. 5 is the flow chart of another embodiment of method of heterogeneous network switching of the present invention;
Fig. 6 is the flow chart of another embodiment of method of heterogeneous network switching of the present invention;
Fig. 7 is the flow chart of another embodiment of method of heterogeneous network switching of the present invention;
Fig. 8 is the flow chart of the another kind of embodiment of method of heterogeneous network switching of the present invention;
Fig. 9 is the structural representation of a kind of embodiment of Mobile Access Gateway of the present invention;
Figure 10 is the structural representation of another embodiment of Mobile Access Gateway of the present invention;
Figure 11 is the structural representation of a kind of embodiment of local mobile anchor point of the present invention;
Figure 12 is the structural representation of another embodiment of local mobile anchor point of the present invention;
Figure 13 is the structural representation of another embodiment of Mobile Access Gateway of the present invention;
Figure 14 is the structural representation of another embodiment of Mobile Access Gateway of the present invention;
Figure 15 is the structural representation of another embodiment of local mobile anchor point of the present invention;
Figure 16 is the structural representation of another embodiment of local mobile anchor point of the present invention;
Figure 17 is the structural representation of another embodiment of local mobile anchor point of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 a is the flow chart of a kind of embodiment of method of terminal access in heterogeneous network of the present invention, and as shown in Figure 1a, the method comprises the following steps:
Fig. 1 b is the schematic diagram that in heterogeneous network of the present invention, a kind of embodiment of method of terminal access is applied to use the heterogeneous network of PMIP, as shown in Figure 1 b, terminal MN possesses many interface capabilities, two the interface IF_1 and the IF_2 that suppose MN can receive by WLAN and WIMAX technical battery the heterogeneous network that uses PMIP respectively, corresponding, Mobile Access Gateway MAG_1 and MAG_2 can be respectively two interfaces by MN be connected with MN, MAG_1 is MN distribution network prefix HNP_1, and MAG_2 is MN distribution network prefix HNP_2.And, the IP address CoA_1 that MAG_1 is used oneself as the Care-of Address of MN to local mobile anchor point (Local Mobility Anchor; Be called for short: the proxy binding register of LMA) carrying out MN; The IP address CoA_2 that MAG_2 is also used oneself carries out the proxy binding register of MN as the Care-of Address of MN to LMA.In addition, LMA records the agent binding record that MN is relevant after completing proxy binding register, if MN passes through the MAG_1 that interface IF_1 has accessed the heterogeneous network that uses PMIP, in agent binding record, will comprise that HNP_1 and CoA_1 bind relevant agent binding information.If follow-up MN accesses MAG_2 by interface IF_2 again, the agent binding of having preserved on LMA record will upgrade, as: increase HNP_2 and bind relevant agent binding information to CoA_2.Mobile Access Gateway MAG_1, MAG_2 will receive the agent binding notice message that carries the agent binding record after renewal of LMA transmission.
Wherein, agent binding on LMA record can have a plurality of, and each MN can a corresponding agent binding record, and this agent binding record comprises the agent binding information of this MN and a plurality of MAG, and the agent binding of MN records the form as shown in table 1 below that is specifically as follows.
The agent binding record of table 1, MN
| Terminal iidentification | Mobile Access Gateway | Home network prefix | Care-of Address | Binding priority | Binding logo | |
| MN_ID | | HNP_1 | CoA_1 | 1 | BID_A | |
| MN_ID | | HNP_2 | CoA_2 | 2 | BID_B | |
| MN_ID | | HNP_3 | CoA_3 | 3 | BID_C |
In table 1, MN_ID can be used as the index of the agent binding record of MN, in embodiments of the present invention, the MAG (as MAG_1, MAG_2, MAG_3) of promising MN trade mark agency binding as shown in table 1 is called the MAG relevant to MN, and the agent binding record of table 1 can be also following form:
" MN-MAG_1-HNP_1-CoA_1, priority 1, BID_A ";
" MN-MAG_2-HNP_2-CoA_2, priority 2, BID_B ";
" MN-MAG_3-HNP_3-CoA_3, priority 3, BID_C ".
Agent binding record also can adopt the form that other can be available to realize, and in the embodiment of the present invention, only for for example, does not limit the concrete form of realizing agent binding record.
Wherein, step 102 specifically can comprise:
If agent binding notice message only comprises the relevant agent binding information of Mobile Access Gateway oneself receiving, the Mobile Access Gateway of Receiving Agent binding notice message is without carrying out extra processing and operation.And if the described agent binding notice message receiving comprises the agent binding information of other Mobile Access Gateways that described terminal is relevant, wherein, other Mobile Access Gateways are the Mobile Access Network Central Shanxi Plain that described terminal is relevant, the gateway except the current Mobile Access Gateway that receives described agent binding notice message.And the forwarding associated record that the current Mobile Access Gateway self that receives described agent binding notice message is preserved does not comprise that the data retransmission of described other Mobile Access Gateways is associated, the home network prefix that the terminal iidentification in the agent binding information of described other Mobile Access Gateways that preservation receives, the interface identifier that described terminal provides for described other Mobile Access Gateways, described other Mobile Access Gateways are described terminal distribution and the IP address of described other Mobile Access Gateways;
Set up respectively terminal that described terminal iidentification the is corresponding home address corresponding with described other Mobile Access Gateways associated to the data retransmission between the IP address of described other Mobile Access Gateways, the described terminal home address corresponding with described other Mobile Access Gateways is described other Mobile Access Gateways home network prefix that is described terminal distribution and the combination of described interface identifier;
If the source IP address in the IP message receiving or the object IP address home address corresponding with described other Mobile Access Gateways that be described terminal, the IP address to described other Mobile Access Gateways by described IP message repeating.
For example: as shown in Figure 1 b, if MAG_1 receives other Mobile Access Gateways that MN is relevant as the agent binding information of MAG_2, but the forwarding associated record that MAG_1 self preserves does not comprise that the data retransmission of MAG_2 is associated, can to preserve MN sign in the agent binding information of the MAG_2 receiving, interface identifier, MAG_2 that MN provides for MAG_2 be the home network prefix HNP_2 that distributes of MN and the IP address CoA_1 of MAG_2 to MAG_1.Then it is associated to the data retransmission between CoA_2 that MAG_1 sets up the home address that MN is corresponding with MAG_2 (combination of the interface identifier that HNP_2 and MN provide for MAG_2).After this, if the combination of the interface identifier that the source IP address in the IP message that MAG_1 receives or object IP address are HNP_2 and MN to be provided for MAG_2, could be by this IP message repeating to CoA_2.
Further, if described agent binding notice message comprises the binding priority of the proxy binding register distribution that described local mobile anchor point is the Mobile Access Gateway that described terminal is relevant, according to described binding priority, determine the priority of described data retransmission association; And/or
If described agent binding notice message comprises the proxy binding register that described local mobile anchor point is the Mobile Access Gateway that described terminal is relevant and distributes binding logo, determines the sign of described data retransmission association according to described binding logo.
Fig. 1 c is the schematic diagram of a kind of embodiment medium priority of method of terminal access in heterogeneous network of the present invention, as shown in Fig. 1 c, terminal MN is respectively by three Mobile Access Gateway MAG_1, MAG_2, MAG_3 access network, and the agent binding of having preserved on LMA record can be form or the form shown in upper table 1.Wherein " 1 ", " 2 ", " 3 " are binding priority, and BID_A, BID_B, BID_C are binding logo.If the agent binding notice message that MAG_1 receives comprises above-mentioned all binding priority and binding logo, MAG_1 can be set to " 2 " according to the priority of BID_B " 1 " priority associated with data retransmission between MAG_2, the sign associated with data retransmission between MAG_2 is set to " BID_B ", the priority associated with data retransmission between MAG_3 according to the priority of BID_C " 3 " is set to " 3 ", the sign associated with data retransmission between MAG_3 is set to " BID_C ", the upper forwarding associated record of preserving of concrete MAG_1 can be form as shown in table 2 below.
Table 2, forwarding associated record
| Terminal iidentification | Mobile Access Gateway | Home network prefix | Care-of Address | Priority | Sign | |
| MN_ID | | HNP_2 | CoA_2 | 2 | BID_B | |
| MN_ID | | HNP_3 | CoA_3 | 3 | BID_C |
Table 2 also can be recorded as following form:
" MN-MAG_2-HNP_2-CoA_2, priority 2, BID_B ";
" MN-MAG_3-HNP_3-CoA_3, priority 3, BID_C ".
In the motion management method of PMIP, if MN is used a plurality of interface access heterogeneous networks of different access technologies, in network, there are a plurality of MAG, and terminal is used a plurality of interfaces to be connected respectively to different MAG, when these a plurality of MAG send agent binding update (Proxy BindingUpdate to LMA respectively; Be called for short: PBU) during message, LMA will create the agent binding of the previous PBU message generation of PBU information updating of receiving after the agent binding of a plurality of separation or use for terminal.And these MAG are because be in different heterogeneous networks, MN is connected to heterogeneous network by different access technologies, and the access device of these network sides is in different network domains, and for example third generation partner program (3
rdgeneration Partnership Project; Be called for short: the various gateways in core net 3GPP), Wimax territory, WLAN territory.The gateway device of prior art can not be connected simultaneously and intercourse information with terminal, because any one gateway does not all know whether terminal keeps being connected with other gateways of other networks, therefore, LMA is upper can only (make a plurality of interfaces be respectively used to different sessions for the Care-of Address that terminal is preserved a plurality of separation, cannot use with, be that any one session can only be used an interface), or retain last Care-of Address.Under these circumstances, between a plurality of interfaces of different radio technology, isolate each other, an IP message with specific network prefix cannot be used whole wave point transmitting-receivings of terminal, can only use the some specific interface transmitting-receiving of terminal.Terminal cannot realize the functions such as switching between a plurality of interfaces of different radio technology, many forwarding address, many ownership, distinct interface, flow mobility.For example user has selected VoIP business, also specific interface and specific home network prefix have been selected thereupon, but home address corresponding to this home network prefix can only be used initial that a kind of interface of determining, cannot use the IP message of other interface transmitting-receiving home address.In addition, according to many interfaces group (MultipleInterface in IETF; Be called for short: research MIF) in the actual use of terminal, is by service application and interface conjunctionn at present mostly, of the prior art according to IP address divide the mode of interface route can not be in existing terminal flexible Application.
And the agent binding of the terminal that the present embodiment has been preserved on local mobile anchor point records while occurring to upgrade, Mobile Access Gateway receives the agent binding notice message that carries the agent binding record after renewal that local mobile anchor point sends, the data retransmission that can set up between the Mobile Access Gateway that terminal is relevant according to agent binding information is wherein associated, therefore, when being connected to a plurality of Mobile Access Gateway by a plurality of interfaces, between a plurality of interfaces, communicate with each other, make terminal in the IP of service application message, use any one to distribute to the IP address of terminal, and can transmit these IP messages of transmitting-receiving with any one interface, flexible and efficient many interfaces/many ownership management have been realized.
Fig. 2 is the flow chart of another embodiment of method of terminal access in heterogeneous network of the present invention, and as shown in Figure 2, the method comprises the following steps:
When the agent binding record of having preserved on local mobile anchor point LMA occurs to upgrade, LMA can send an agent binding notice message to the relevant Mobile Access Gateway MAG of terminal, agent binding record after renewal is occurred to upgrade sending to the MAG that terminal is relevant, thereby make the MAG that terminal is relevant upgrade and to set up data retransmission association according to the generation of agent binding record.Specifically can be referring to Fig. 1 b in a upper embodiment and relevant narration.
Further, before step 201, can also local mobile anchor point be the process that terminal and Mobile Access Gateway are set up agent binding, specifically can comprise:
When the agent binding record of the terminal that the present embodiment has been preserved on local mobile anchor point occurs to upgrade, the agent binding notice message that carries the agent binding record after renewal that local mobile anchor point sends to Mobile Access Gateway, the data retransmission that Mobile Access Gateway can be set up between the Mobile Access Gateway that terminal is relevant according to agent binding information is wherein associated, therefore, when being connected to a plurality of Mobile Access Gateway by a plurality of interfaces, between a plurality of interfaces, communicate with each other, make terminal in the IP of service application message, use any one to distribute to the IP address of terminal, and can transmit these IP messages of transmitting-receiving with any one interface, flexible and efficient many interfaces/many ownership management have been realized.
Fig. 3 is the flow chart of another embodiment of method of terminal access in heterogeneous network of the present invention, and as shown in Figure 3, the method specifically can comprise the following steps:
Step 301, terminal MN are connected to after Mobile Access Gateway MAG_1 by interface IF_1, and MAG_1 can distribute home network prefix (Home Network Prefix for MN; Be called for short: HNP) as HNP_1.Wherein, the access way that IF_1 adopts can be used certain specific wireless technology, such as WCDMA or Wimax etc., and the embodiment of the present invention does not limit concrete access way.
It is PBU message that step 302, MAG_1 send agent binding update (ProxyBinding Update) message to local mobile anchor point LMA, in PBU message, can comprise that the interface identifier that this MN sign, MN provide for MAG_1 (can be the physical interface sign of IF_1, also can be the virtual interface sign that MN provides), MAG_1 is the HNP_1 that distributes of MN, as the IP address CoA_1 of the MAG_1 of the Care-of Address of MN, and other relevant informations.
Step 303, LMA set up agent binding between the IP address CoA_1 of MN, HNP_1 and MAG_1, can for distributing, bind this agent binding according to the attribute of user under MN priority and binding logo, then LMA returns to agent binding to MAG_1 and confirms that (Proxy BindingAcknowledgement) message is PBA message, in PBA message, can comprise interface identifier, HNP_1, CoA_1 etc. that MN sign, MN provide for MAG_1, in PBA message, can also comprise other information such as the binding priority of this agent binding and binding logo.
Step 304, LMA send agent binding to MAG_1 and notice (Proxy Binding Notify) message, in agent binding notice message, can comprise MN and the MAG_1 agent binding information on LMA, specifically can comprise other information such as the binding priority of MN sign, HNP_1, CoA_1 and this agent binding and binding logo.If indication need to be returned to response message in agent binding notice message, MAG_1 can also return to agent binding to LMA and notice confirmation (Proxy Binding NotifyAcknowledgement) message.
Step 305, MN are connected to Mobile Access Gateway MAG_2 by interface IF_2, and MAG_2 is that MN distributes home network prefix HNP_2.The access way of IF_2 can be used certain specific wireless technology identical or different from IF_1, and the embodiment of the present invention does not limit concrete access way.
Step 306, MAG_2 send agent binding update messages to LMA, agent binding update messages comprise interface identifier (can be the physical interface sign of IF_2, can be also the virtual interface sign that MN provides), MAG_2 that MN sign, MN provide for MAG_2 be the HNP_2 that distributes of MN, as IP address CoA_2 and other information of the MAG_2 of the Care-of Address of MN.
Step 307, LMA set up agent binding between MN, HNP_2 and CoA_2, and be this agent binding distribution binding priority and binding logo according to the attribute of user under MN, then LMA returns to proxy binding acknowledgment messages to MAG_2, and proxy binding acknowledgment messages comprises that interface IP address, MAG_2 that MN sign, MN provide for MAG_2 are other information such as the IP address CoA_2 of HNP_2, MAG_2 that distributes of MN and the binding priority of this agent binding and binding logo.
On step 308, LMA, preserve MN by the agent binding information of MAG_1 and MAG_2 access simultaneously, LMA sends agent binding notice message to MAG_1, this agent binding notice message comprises MN and MAG_1, the MAG_2 agent binding information on LMA, specifically comprises other information such as interface identifier, HNP_2, CoA_2 and binding priority and binding logo that interface identifier, HNP_1, CoA_1, MN that MN sign, MN provide for MAG_1 provide for MAG_2.If indication need to be returned to response message in agent binding notice message, MAG_1 can also return to agent binding to LMA and notice acknowledge message.
All agent binding information in the forwarding associated record that step 309, MAG_1 are preserved according to self and the agent binding notice message receiving can be set up the home address that MN is corresponding with MAG_2 associated to the data retransmission of MAG_2 in MAG_1.The combination of the interface identifier that the home address that wherein MN is corresponding with MAG_2 provides for MAG_2 for HNP_2 and MN.
In step 309, MAG_2 is the Mobile Access Gateway newly increasing for MN in agent binding notice message, the local forwarding associated record not having about MAG_2 of MAG_1, MAG_1 can preserve after the information such as interface identifier, HNP_2, CoA_2, binding priority and binding logo that MN identifies, MN provides for MAG_2 in agent binding notice message, in MAG_1, set up the home address that MN is corresponding with MAG_2 associated to the data retransmission of MAG_2, and be saved in the associated record of forwarding.After this, when MAG_1 receives any source IP address or object IP address and is the IP message of " interface identifier that HNP_2+MN provides for MAG_2 " combination, the IP address CoA_2 that this IP message repeating is arrived.In addition, MAG_1 can also be defined as the priority of this data retransmission association MN in agent binding notice message and the binding priority of MAG_2.
Wherein, LMA is when the agent binding record of MN each time changes, can send agent binding notice message to all MAG of all participation MN agent bindings, to all relevant MAG, notice the agent binding information of MN, can make intercommunication MN between a plurality of MAG pass through the agent binding information of gateway accessing network separately.And for all MAG that receive agent binding notice message, if the agent binding notice message receiving only comprises the agent binding information that this MAG oneself is relevant, this MAG is without extra processing and operation; If the agent binding notice message receiving comprises the agent binding information of this MAG and other MAG, each MAG that receives this agent binding notice message can set up data retransmission binding between IP address each other, realizes home address/interface data route more flexibly.
Step 310, LMA send agent binding notice message to MAG_2, this agent binding notice message comprises MN and MAG_1, the MAG_2 agent binding information on LMA, specifically comprises other information such as interface identifier, HNP_2, CoA_2 and binding priority and binding logo that interface identifier, HNP_1, CoA_1, MN that MN sign, MN provide for MAG_1 provide for MAG_2.If indication need to be returned to response message in this agent binding notice message, MAG_2 can also return to agent binding to LMA and notice acknowledge message.
All agent binding information in the forwarding associated record that step 311, MAG_2 are preserved according to self and the agent binding notice message receiving can be set up the home address that MN is corresponding with MAG_1 associated to the data retransmission of MAG_1 in MAG_2.The combination of the interface identifier that the home address that wherein MN is corresponding with MAG_1 provides for MAG_1 for HNP_1 and MN.
In step 311, suppose that MAG_1 is the Mobile Access Gateway newly increasing for MN in agent binding notice message, the local forwarding associated record not having about MAG_1 of MAG_2, MAG_2 can preserve the MN sign in agent binding notice message, interface identifier, HNP_1, the CoA_1 that MN provides for MAG_1, in MAG_2, set up the home address that MN is corresponding with MAG_1 associated to the data retransmission of MAG_1, and be saved in the associated record of forwarding.After this, if MAG_2 receives any source IP address or object IP address is the IP message of " interface identifier that HNP_1+MN provides for MAG_2 " combination, the IP address CoA_1 by this IP message repeating to MAG_1.The priority of this data retransmission association can also be defined as to the binding priority of MN and MAG_2.
Step 312, MN are connected to Mobile Access Gateway MAG_3 by interface IF_3, and MAG_3 is that MN distributes home network prefix HNP_3.The access way that IF_3 adopts can use certain specific wireless technology identical or different from IF_1, IF_2, and the embodiment of the present invention does not limit concrete access way.
Step 313, MAG_3 send agent binding update messages to LMA, and interface identifier, the MAG_3 providing for MAG_3 comprising MN sign, MN be the HNP_3 that distributes of MN, as IP address CoA_3 and other information of the MAG_3 of the Care-of Address of MN.
Step 314, LMA set up agent binding between MN, HNP_3 and CoA_3, and be this agent binding distribution binding priority and binding logo according to the attribute of user under MN, then LMA returns to proxy binding acknowledgment messages to MAG_3, and proxy binding acknowledgment messages comprises other information such as interface IP address, HNP_3, CoA_3 and binding priority and binding logo that MN sign, MN provide for MAG_3.
On step 315, LMA, preserve MN by the agent binding information of MAG_1, MAG_2 and MAG_3 access simultaneously, LMA sends agent binding notice message to MAG_1, this agent binding notice message comprises that MN passes through MAG_1, MAG_2 and the agent binding information of MAG_3 on LMA, specifically comprises other information such as interface identifier, HNP_1, CoA_1, HNP_2, CoA_2, HNP_3, CoA_3 and binding priority and binding logo that MN sign, MN provide for MAG_1, MAG_2, MAG_3.If response message is returned in indication in this agent binding notice message, MAG_1 can also return to agent binding to LMA and notice acknowledge message.
The forwarding associated record that step 316, MAG_1 preserve according to self and the agent binding notice message receiving are set up the home address that MN is corresponding with MAG_3 associated to the data retransmission of MAG_3 in MAG_1.Wherein, due to associated at the data retransmission of the local existing MAG_2 of MAG_1 in step 309, and MAG_3 is the Mobile Access Gateway newly increasing, the local forwarding associated record not having about MAG_3 of MAG_1, MAG_1 can preserve the MN sign in agent binding notice message, interface identifier, HNP_3, the CoA_3 that MN provides for MAG_3, in MAG_1, set up the home address that MN is corresponding with MAG_3 associated to the data retransmission of MAG_3, and be saved in the associated record of forwarding.After this, when MAG_1 receives any source IP address or object IP address and is the IP message of " interface identifier that HNP_3+MN provides for MAG_3 " combination, the IP address CoA_3 by this IP message repeating to MAG_3.The priority of this data retransmission association can also be defined as to the binding priority of MN and MAG_3.
Step 317, LMA send agent binding notice message to MAG_2, and this agent binding notice message comprises that MN passes through MAG_1, MAG_2 and the agent binding information of MAG_3 on LMA, specifically can be with reference to the content in step 315.If response message is returned in indication in this agent binding notice message, MAG_2 can also return to agent binding to LMA and notice acknowledge message.
Step 318, the forwarding associated record that MAG_2 preserves according to self and the agent binding notice message receiving, in MAG_2, set up the home address that MN is corresponding with MAG_3 associated to the data retransmission of MAG_3, wherein, owing to having the forwarding associated record of MAG_1 in MAG_2 this locality in step 311, and MAG_3 is the Mobile Access Gateway newly increasing for MN in agent binding notice message, MAG_2 this locality does not have the relevant binding record of MAG_3, MAG_2 is according to the MN sign in agent binding notice message, the interface identifier that MN provides for MAG_3, MAG_3 is the HNP_3 that MN distributes, the IP address CoA_3 of MAG_3, in MAG_2, set up the home address that MN is corresponding with MAG_3 associated to the data retransmission of MAG_3, and be saved in the associated record of forwarding.After this, if MAG_2 receives the message that any source IP address or object IP address are " interface identifier that HNP_3+MN provides for MAG_3 " combinations, can be by this message repeating the IP address CoA_3 to MAG_3.The priority of this data retransmission association can also be defined as to the binding priority of MN and MAG_3.
Step 319, LMA send agent binding notice message to MAG_3, and this agent binding notice message comprises that MN passes through MAG_1, MAG_2 and the agent binding information of MAG_3 on LMA, specifically can be with reference to the content in step 315.If indication need to be returned to response message in this agent binding notice message, MAG_3 can also return to agent binding to LMA and notice acknowledge message.
Step 320, the forwarding associated record that MAG_3 preserves according to self and the agent binding notice message receiving, in MAG_3, set up the home address that MN is corresponding with MAG_1 associated to the data retransmission of MAG_1, wherein, MAG_1 is the Mobile Access Gateway newly increasing for MN in agent binding notice message, the forwarding associated record that there is no MAG_1 in MAG_3 this locality, MAG_3 is according to the MN sign in agent binding notice message, the interface identifier that MN provides for MAG_1, HNP_1, CoA_1, in MAG_3, set up the home address that MN is corresponding with MAG_1 associated to the data retransmission of MAG_1, and be saved in the associated record of forwarding.After this, if receive at MAG_3 the IP message that any source IP address or object IP address are " interface identifier that HNP_1+MN provides for MAG_1 " combinations, can be by this IP message repeating the IP address CoA_1 to MAG_1.
Step 321, the forwarding associated record that MAG_3 preserves according to self and the agent binding notice message receiving, in MAG_3, set up the home address that MN is corresponding with MAG_2 associated to the data retransmission of MAG_2, wherein, MAG_2 is the Mobile Access Gateway newly increasing for MN in agent binding notice message, the forwarding associated record that there is no MAG_2 in MAG_3 this locality, MAG_3 can preserve the MN sign in agent binding notice message, the interface identifier that MN provides for MAG_2, HNP_2, CoA_2, set up the home address that MN is corresponding with MAG_2 associated to the data retransmission of MAG_2, and be saved in the associated record of forwarding.After this, if MAG_3 receives any source IP address or object IP address is the IP message of " interface identifier that HNP_2+MN provides for MAG_2 " combination, all the IP address CoA_2 to MAG_2 by this IP message repeating.
When the agent binding record of the terminal that the present embodiment has been preserved on LMA occurs to upgrade, the agent binding notice message that carries the agent binding record after renewal that LMA sends to all MAG relevant to MN, the MAG that receives agent binding notice message can set up the data retransmission association between the MAG that MN is relevant according to agent binding information wherein, therefore, when MN is connected to a plurality of MAG by a plurality of interfaces, between a plurality of interfaces, communicate with each other, make MN in the IP of service application message, use any one to distribute to the IP address of terminal, and can transmit these IP messages of transmitting-receiving with any one interface, flexible and efficient many interfaces/many ownership management have been realized.
Fig. 4 is the flow chart of a kind of embodiment of method of heterogeneous network switching of the present invention, and as shown in Figure 4, the method can comprise the following steps:
New Mobile Access Gateway after step 401, switching sends agent binding update messages to local mobile anchor point, described agent binding update messages comprises IP address and the switching indication parameter of the new interface sign after terminal iidentification, switching, the new home network prefix that described new Mobile Access Gateway is described terminal distribution, described new Mobile Access Gateway, and described switching indication parameter is set to switch;
Using PMIP to carry out in the heterogeneous network of mobile management, terminal can access respectively different networks by different interfaces, terminal can adopt corresponding interface and Mobile Access Gateway to receive transmitting IP packet, because end is mobile or the link-quality problem such as eventually, interface and Mobile Access Gateway that terminal is received transmitting IP packet may change, need to be switched to another interface and Mobile Access Gateway, now, Mobile Access Gateway before switching is old Mobile Access Gateway, and the Mobile Access Gateway after switching is new Mobile Access Gateway.Wherein, the condition switching comprises following example:
Example one, described new Mobile Access Gateway detect described terminal and to described new Mobile Access Gateway, send IP message by new interface;
The switching of terminal from old interface to new interface can initiatively be initiated for terminal, when detecting radio link quality, terminal changes, while meeting switching condition, terminal can select to be switched to new interface automatically, and user also can directly manually select to be switched to new interface in terminal.Selection is switched to after new interface, and the new Mobile Access Gateway that terminal accesses by new interface sends IP message to network.If when new Mobile Access Gateway sense terminals sends data by oneself to network, new Mobile Access Gateway sends the agent binding update messages that is set to switch with switching indication parameter to local mobile anchor point.
Example two, described new Mobile Access Gateway or old Mobile Access Gateway detect radio link quality and meet after switching condition.
The switching of terminal from old interface to new interface can initiatively be initiated for network side, when the new Mobile Access Gateway of network side or old Mobile Access Gateway detect radio link quality meet switching condition as terminal to the radio link quality of new Mobile Access Gateway good than to old Mobile Access Gateway, from new Mobile Access Gateway or old Mobile Access Gateway, initiate to switch, then new Mobile Access Gateway sends the agent binding update messages that is set to switch with switching indication parameter to local mobile anchor point.
In addition, for reduce switched in the packet loss of transfer of data, after step 401, can also comprise the following steps:
Described new Mobile Access Gateway sends switch indicating information to described old Mobile Access Gateway;
Described new Mobile Access Gateway receives the switching response message that described old Mobile Access Gateway returns;
Described new Mobile Access Gateway receives the IP message of the described terminal of described old Mobile Access Gateway forwarding from the data forwarding channel between described old Mobile Access Gateway and described new Mobile Access Gateway.
Wherein, between new Mobile Access Gateway and old Mobile Access Gateway, can send mutually switch indicating information, associated owing to can setting up data retransmission between old Mobile Access Gateway and described new Mobile Access Gateway, have data forwarding channel, therefore new Mobile Access Gateway can lead to by this data retransmission the IP message of the terminal that receives old Mobile Access Gateway forwarding.Wherein, between old Mobile Access Gateway and described new Mobile Access Gateway, can set up the associated concrete grammar of data retransmission can be with reference to relevant narration in the embodiment of the method for terminal access in above-mentioned heterogeneous network.
The new Mobile Access Gateway of the present embodiment sends after agent binding update messages to local mobile anchor point, if switching indication parameter is wherein set to switch, local mobile anchor point can comprise that the data forwarding channel after switching is set to point to new Mobile Access Gateway, new Mobile Access Gateway and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Fig. 5 is the flow chart of another embodiment of method of heterogeneous network switching of the present invention, and as shown in Figure 5, the method can comprise the following steps:
If the described switching indication parameter of step 502 is set to switch, data forwarding channel corresponding to old home network prefix that old Mobile Access Gateway is described terminal distribution is set to point to described new Mobile Access Gateway.
Further, if agent binding update messages also comprises flow descriptors, the method can also comprise: according to described flow descriptors, the data forwarding channel of the business data flow switching is set to point to described new Mobile Access Gateway.
In addition, local mobile anchor point can also be modified to the binding priority of terminal and each Mobile Access Gateway, specifically comprises:
Binding priority update in the agent binding information that described terminal is registered by described new Mobile Access Gateway is high priority; And/or
Binding priority update in the agent binding information that described terminal is registered by described old Mobile Access Gateway is low priority.
Wherein, local mobile anchor point can be according to the agent binding update messages receiving, the data forwarding channel of terminal is set to point to new Mobile Access Gateway, then the binding priority that this new Mobile Access Gateway is corresponding is set to high priority, if the binding priority that old new Mobile Access Gateway is corresponding is before high priority, the binding priority of these old new Mobile Access Gateways is reduced.Then the follow-up IP message of terminal can be used new corresponding route and the new interface of Mobile Access Gateway to receive and dispatch.After revising priority, terminal will preferentially send IP message from new interface corresponding to high priority and new Mobile Access Gateway to network side.
The present embodiment local mobile anchor point receives after agent binding update messages, if switching indication parameter is wherein set to switch, can comprise that the data forwarding channel after switching is set to point to new Mobile Access Gateway, new Mobile Access Gateway and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Fig. 6 is the flow chart of another embodiment of method of heterogeneous network switching of the present invention, as shown in Figure 6, supposes to initiate to switch in terminal MN side, and the method can comprise the following steps:
Step 601, terminal MN, by interface IF_1 access network, are connected to Mobile Access Gateway MAG_1, and MAG_1 is that MN distributes home network prefix HNP_1.
Step 602, MAG_1 send agent binding update (Proxy Binding Update) message to LMA, be PBU message, the interface identifier providing for MAG_1 comprising MN sign, MN, HNP_1, as the IP address CoA_1 of the MAG_1 of the forwarding address of MN, switch indication parameter (Handoff Indicator Option), wherein switch indication parameter and be set to new access, as Attachmentover a new interface, can indicate this proxy binding register is that MN passes through the new access network of this interface IF_1.
LMA receives after PBU message as MN creates the agent binding of MAG_1 and be recorded in agent binding record, for example: by " interface identifier that HNP_1+MN provides for MAG_1 " as the MN home address corresponding with MAG_1, Care-of Address using CoA_1 as MN, and after the Care-of Address CoA of the MN home address corresponding with MAG_1 and MN is associated, be saved in agent binding record, then can return to proxy binding acknowledgment messages to MAG_1.
In addition, LMA can also send agent binding notice message to notice the relevant agent binding record of MN of having preserved on LMA to MAG_1, now, in the agent binding of the upper preservation of LMA record, only comprises that MN is connected to the agent binding information of MAG_1 by interface IF_1.MAG_1 can return to agent binding notice acknowledge message to LMA after receiving agent binding notice message.
Step 603, MN, by interface IF_2 access network, are connected to MAG_2, and MAG_2 is that MN distributes home network prefix HNP_2.
Step 604, MAG_2 send PBU message to LMA, the interface identifier, HNP_2, CoA_2, the switching indication parameter that comprising MN sign, MN, for MAG_2, provide, wherein switch indication parameter and be set to new access, indicating this proxy binding register is that MN passes through the new access network of this interface IF_2.
LMA receives the agent binding record that creates MAG_2 after PBU message for MN, for example: by " interface identifier that HNP_2+MN provides for MAG_2 " as MN home address corresponding to MAG_2, using the Care-of Address as MN, and by the Care-of Address CoA_2 of MN home address corresponding to MAG_2 and MN, be saved in agent binding record, then can return to acknowledge message to MAG_2.
In addition, LMA can also be respectively sends agent binding notice message to notice the relevant agent binding record of MN of having preserved on LMA to MAG_1 and MAG_2, and the agent binding of now having preserved on LMA record comprises that MN is connected to MAG_1 by IF_1 and by IF_2, is connected to the agent binding information of MAG_2.MAG_1 and MAG_2 can return to agent binding notice acknowledge message to LMA respectively after receiving agent binding notice message.
Step 605, MN, by interface IF_3 access network, are connected to MAG_3, and MAG_3 is that MN distributes home network prefix HNP_3.
Step 606, MAG_3 send PBU message to LMA, the interface identifier, HNP_3, CoA_3, the switching indication parameter value that comprising MN sign, MN, for MAG_3, provide, wherein, switch indication parameter value and be set to new access, indicating this proxy binding register is that MN passes through the new access network of this interface IF_3.LMA receives the agent binding record that creates MAG_3 after PBU message for MN, for example: using " interface identifier that HNP_3+MN provides for MAG_3 " as the MN home address corresponding with MAG_2, send to CoA_1 and be recorded in agent binding record, then can return to acknowledge message to MAG_3.
In addition, LMA also notices with MAG_3 the relevant agent binding record of MN of having preserved on LMA to MAG_1, MAG_2, now, the agent binding record of having preserved on LMA comprises that MN is connected to MAG_1, by IF_2, is connected to MAG_2 and by IF_3, is connected to the agent binding information of MAG_3 by IF_1.MAG_1, MAG_2 and MAG_3 can return to agent binding notice acknowledge message to LMA after receiving agent binding notice message.
If having set interface IF_1 in user's user property under step 607 MN is priority interface, terminal (MN) and network side (LMA and MAG) all will preferentially be used MAG_1 and IF_1 as MN data forwarding channel, by IF_1 transceiving data so.Wherein, step 607 is optional steps, and for example MN may not have data transmit-receive in just completing the stage of initial access registration, does not therefore need specified data forwarding channel.
Step 608, MN are moved or reconfigure the reasons such as interface, the radio link quality that may cause MN MAG_1 to be detected drops to that threshold value is following, MN to the radio link quality of MAG_2, bring up to threshold value more than and higher than MAG_3, can change to use MAG_2 and IF_2 as the data forwarding channel of MN.Wherein, MAG_2 and IF_2 can be selected and initiate to switch for automatically change interface by MN when radio link quality changes as the initiating method of the data forwarding channel of MN, also can initiate to switch for manually changing user when interface is selected.Now, MAG_1 is new MAG, and MAG2 is old MAG, and IF_1 is new interface, and IF_2 is old interface.
The interface of step 609, MN is selected to change, and MN initiates interface and switches, and from interface IF_1, is switched to IF_2, and MN will send data to MAG_2 by new interface IF_2, or receives the data of MAG.
The IP message that step 610, MAG_2 can Real-Time Monitoring MN send to network side, when MAG_2 detects MN and sends IP message to MAG_2, can trigger MN to the switching of new interface IF_2.
Further, MAG_2 can be by detecting the feature of IP message, such as the source IP address of IP message, object IP address, source port number, destination slogan, type of service etc., parse MN and switched which business data flow to new interface IF_2, and according to the feature of these business data flows, trigger stream mobility (flow mobility) characteristic.
Step 611, MAG_2 send switch indicating information to MAG_1, and indication MAG_1 terminal MN has been switched to business interface IF_2.Wherein, step 611 is optional steps, only when MAG_2 detects MN as new MAG and sends data by MAG_2 to network side, and MN has while using higher priority to carry out agent binding by MAG_1 on LMA as old MAG, and MAG_2 just sends switch indicating information to these old MAG.The agent binding notice message that new MAG can send according to LMA, finds out corresponding old MAG, and completes the data retransmission indication between new MAG and old MAG.
Step 612, MAG_1 return to switching response message to MAG_2, accept the switching indication of MAG_2.
Step 613, MAG_1 set up data forwarding channel between MAG_1 and MAG_2, and MAG_1 is all transmitted to MAG_2 by the IP message of follow-up MN and processes.This process can be the IP message of MN for forward those destinations of having transmitted in network, can reduce the loss of data in handoff procedure, promotes performance of handoffs.
Step 614, MAG_2 detect after the interface switching of MN, again to LMA, send PBU message, the interface identifier, HNP_2, CoA_2, the switching indication parameter that comprising MN sign, MN, for MAG_2, provide, now switch indication parameter and be set to switch, indicating this proxy binding register is that MN is switched to the access network by MAG_2.
Further, MAG_2 can increase the flow descriptors of service switchover data flow in PBU message, to indicate which business data flow of LMA that switching has occurred, thereby realizes flow mobility function.LMA receives after this PBU message, and the priority that can MN be connected to the agent binding record of MAG_2 by IF_2 is set to high priority, and returns to acknowledge message to MAG_2.In addition, if preserved MN on LMA, by other interfaces, be connected to other MAG as the high priority agent binding of MAG_1, LMA can reduce the priority of the agent binding of these MAG, usings and guarantees that MN is connected to MAG_2 as the agent binding of limit priority by IF_2.
Further, LMA can send agent binding notice message to notice the relevant agent binding record of MN after the upper renewal of LMA to MAG_1, MAG_2 and MAG_3.The agent binding record of now having preserved on LMA comprises that MN passes through the agent binding information of MAG_1, MAG_2 and MAG_3.MAG_1, MAG_2 and MAG_3 can return to agent binding notice acknowledge message to LMA after receiving agent binding notice message.
The interface of step 615, MN has switched, and MN, by new interface IF_2 transceiving data, as sent IP message by IF_2 to MAG_2, thereby is switched to new interface IF_2 by the data forwarding channel of upstream data; After the new switching indication parameter of LMA reception MAG_2 is the agent binding update messages switching, the data forwarding channel after switching is pointed to MAG_2, thereby downlink data is switched to from MAG_2 and sends to terminal by IF_2.
The present embodiment terminal is initiated after interface switching, new MAG sends PBU message to LMA, if switching indication parameter is wherein set to switch, LMA can comprise that the data forwarding channel after switching is set to point to new LMA, new LMA and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Fig. 7 is the flow chart of another embodiment of method of heterogeneous network switching of the present invention, and as shown in Figure 7, the main distinction of the present embodiment and a upper embodiment is that, by network side initiation switching, the method can comprise the following steps:
Wherein, step 701 is the process of MAG_1, MAG_2, the new access network of MAG_3 to step 707, identical to step 607 with the step 601 in a upper embodiment, can be with reference to the associated description in a upper embodiment.
Step 708, MAG_1 monitor MN to the radio link quality of MAG_1, MAG_2 monitoring MN is to the radio link quality of MAG_2, when MN drops to can load threshold requirement to the quality of radio connection of MAG_2 higher than threshold value lower than threshold value, MN time to radio link quality between MAG_1, MAG_1 and MAG_2 can trigger network interface and switch, and automatically change to choice for use MAG_2 and IF_2 as the data forwarding channel of MN.Now, MAG_1 is old MAG, and IF_1 is old interface; MAG_2 is new MAG, and IF_2 is new interface.
In step 709, MAG_1 and the process as the newly MAG_2 triggering MN interface switching of MAG as old MAG, can be that old MAG sends switch indicating information to new MAG, also can be that new MAG sends switch indicating information to old MAG, a side who receives switch indicating information can return to switching response message.
In addition, in the embodiment of the present invention, LMA can send agent binding notice message to new MAG, old MAG respectively, record IP address and binding information (comprising home network prefix and binding priority etc.) corresponding to all the other MAG of all the other MAG, new MAG and old MAG can know that the other side is the information that MN sets up agent binding, and can complete the indication of switching.
Step 710, MAG_1 set up after data forwarding channel between MAG_1 and MAG_2, and MAG_1 can all be transmitted to MAG_2 by the IP message of the follow-up MN receiving and process.The IP message that those destinations that this process can have been transmitted for forwarding in network are MN, can reduce the loss of data in handoff procedure, promotes performance of handoffs.
Step 711, MAG_2 detect after the interface switching of MN, again to LMA, send PBU message, comprising interface identifier, the IP address CoA_2 of HNP_2, MAG_2, the switching indication parameter that MN identifies, MN provides for MAG_2, wherein switch indication parameter and be set to switch, indicating this proxy binding register is that MN is switched to the access network from MAG_2.
Further, MAG_2 can increase the flow descriptors of service switchover data flow in PBU message, with which business data flow of indication LMA, there is switching, thereby the data forwarding channel of the business data flow switching has been pointed to MAG_2, realized flow mobility function.LMA receives after this PBU message, and the priority that can MN be connected to the agent binding of MAG_2 by new interface IF_2 is set to high priority, and returns to acknowledge message to MAG_2.In addition, if preserved MN on LMA, by other interfaces, be connected to other MAG as the high priority agent binding of MAG_1, LMA can reduce the priority of the agent binding of MAG_1, usings and guarantees that MN is connected to MAG_2 as the agent binding of limit priority by new interface IF_2.
Further, LMA can send agent binding notice message to notice the relevant agent binding record of MN after the upper renewal of LMA to MAG_1, MAG_2 and MAG_3.The agent binding record of now having preserved on LMA comprises that MN passes through the agent binding information of MAG_1, MAG_2 and MAG_3.MAG_1, MAG_2 and MAG_3 can return to agent binding notice acknowledge message to LMA after receiving agent binding notice message.
The interface of step 712, MN has switched, and MN passes through new interface IF_2 transceiving data, as: by mouth IF_2, to MAG_2, send IP message, thereby the data forwarding channel of upstream data is switched to new interface IF_2; After the new switching indication parameter of LMA reception MAG_2 is the agent binding update messages switching, the data forwarding channel after switching is pointed to MAG_2, thereby downlink data is switched to from MAG_2 and sends to terminal by IF_2.
The present embodiment network side is initiated after interface switching, new MAG sends PBU message to LMA, if switching indication parameter is wherein set to switch, LMA can comprise that the data forwarding channel after switching is set to point to new LMA, new LMA and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
It should be noted that, the terminal in the embodiment of the present invention can have a plurality of interfaces, the not restriction to terminal interface of IF_1, IF_2, IF_3; In network, can there are a plurality of MAG Mobile Access Gateways, the restriction that MAG_1, MAG_2 and MAG_3 neither be to network configurations.It is example explanation that mobile device is connected to three different Mobile Access Gateways with three interfaces, and the method can be connected to a plurality of different Mobile Access Gateways for a plurality of interfaces.
Fig. 8 is the flow chart of the another kind of embodiment of method of heterogeneous network switching of the present invention, and as shown in Figure 8, the method that this heterogeneous network switches comprises:
The data forwarding channel of step 802, described terminal is set to point to described new mobile mobile gateway from pointing to old Mobile Access Gateway.
Using PMIP to carry out in the heterogeneous network of mobile management, terminal can access respectively different networks by different interfaces, and terminal can adopt corresponding interface and Mobile Access Gateway to receive transmitting IP packet.The switching of terminal from old interface to new interface can initiatively be initiated for terminal, when detecting radio link quality, terminal changes, while meeting switching condition, terminal can select to be switched to new interface automatically, and user also can directly manually select to be switched to new interface in terminal.Selection is switched to after new interface, and the new Mobile Access Gateway that terminal accesses by new interface sends IP message to network, and new Mobile Access Gateway forwards the IP message receiving from terminal to local mobile anchor point.
If local mobile anchor point detects terminal and sends IP message by new Mobile Access Gateway to network, local mobile anchor point can described terminal data forwarding channel be set to point to new Mobile Access Gateway, specifically can comprise following at least one example:
Binding priority update in example one, agent binding information that described new Mobile Access Gateway is registered is high priority; For example: suppose that MAG_1 is old Mobile Access Gateway, MAG_2 is new Mobile Access Gateway, by the binding priority update of MAG_2 in the table 1 of above-described embodiment, is " 1 ".
Binding priority update in example two, agent binding information that described old Mobile Access Gateway is registered is low priority; For example: suppose that MAG_1 is old Mobile Access Gateway, MAG_2 is new Mobile Access Gateway, by the binding priority update of MAG_1 in the table 1 of above-described embodiment, is " 2 ".
Data forwarding channel corresponding to old home network prefix that example three, old Mobile Access Gateway are described terminal distribution is set to point to described new Mobile Access Gateway;
For example: what the agent binding record before switching of MN comprised thes contents are as follows shown in table 3, suppose that MAG_1 is old Mobile Access Gateway, MAG_2 is new Mobile Access Gateway, if data forwarding channel corresponding to old home network prefix HNP_1 of the MAG_2 in table 3 is set to point to MAG_2, Care-of Address corresponding to HNP_1 in the agent binding information of MAG_1 registration will be updated to CoA_2 from CoA_1, as shown in table 4.
Agent binding record before table 3, switching
| Terminal iidentification | Mobile Access Gateway | Home network prefix | Care-of Address | Binding priority | Binding logo | |
| MN_ID | | HNP_1 | CoA_1 | 1 | BID_A | |
| MN_ID | | HNP_2 | CoA_2 | 2 | BID_B |
Agent binding record after table 4, switching
| Terminal iidentification | Mobile Access Gateway | Home network prefix | Care-of Address | Binding priority | Binding logo | |
| MN_ID | | HNP_1 | CoA_2 | 1 | BID_A | |
| MN_ID | | HNP_2 | CoA_2 | 2 | BID_B |
Example four, to described new Mobile Access Gateway, send the agent binding Indication message of the agent binding information that comprises new Mobile Access Gateway registration after renewal, described, to described old Mobile Access Gateway, send agent binding Indication message after upgrading, that comprise the agent binding information of described old Mobile Access Gateway registration.Wherein, the agent binding information in agent binding Indication message can for as in example one, two according to agent binding information corresponding to amended each MAG of table 1, can be also the agent binding information as each MAG is corresponding in table 3, table 4.
In the present embodiment, when local mobile anchor point detects terminal to new Mobile Access Gateway transmission IP message, the new Mobile Access Gateway that can be switched to from old Mobile Access Gateway, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Fig. 9 is the structural representation of a kind of embodiment of Mobile Access Gateway of the present invention, and as shown in Figure 9, this Mobile Access Gateway can comprise: notice receiver module 11 and relating module 13.
Wherein, notice receiver module 11, the agent binding notice message that carries the agent binding record after renewal sending for receiving local mobile anchor point, the agent binding record after described renewal comprises the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration;
Relating module 13, for according to the forwarding associated record of described agent binding information and self preservation, sets up the data retransmission association between the Mobile Access Gateway that described terminal is relevant.
Particularly, when terminal is used the interface of a plurality of different radio technology to be connected to network, if the agent binding of the terminal of having preserved on local mobile anchor point record upgrades, the notice receiver module 11 of Mobile Access Gateway can receive the agent binding notice message that carries the agent binding record after renewal that local mobile anchor point sends, then the agent binding information that the relevant Mobile Access Gateway of terminal that relating module 13 comprises according to the agent binding record after upgrading is described endpoint registration, and the forwarding associated record of this Mobile Access Gateway self preservation, judge that this Mobile Access Network shuts the forwarding associated record of whether having preserved with other Mobile Access Gateways, if do not had, can set up this Mobile Access Gateway associated with the data retransmission of other Mobile Access Gateways, and be saved in forwarding associated record.Follow-up, if this Mobile Access Gateway receives the IP message that terminal need to send to other Mobile Access Gateways, can give corresponding Mobile Access Gateway by this IP message repeating.
When the agent binding record of the terminal that the present embodiment has been preserved on local mobile anchor point occurs to upgrade, notice receiver module and receive the agent binding notice message that carries the agent binding record after renewal that described local mobile anchor point sends, the data retransmission that relating module can be set up between the Mobile Access Gateway that terminal is relevant according to agent binding information is wherein associated, therefore, when being connected to a plurality of Mobile Access Gateway by a plurality of interfaces, between a plurality of interfaces, communicate with each other, make terminal in the IP of service application message, use any one to distribute to the IP address of terminal, and can transmit these IP messages of transmitting-receiving with any one interface, flexible and efficient many interfaces/many ownership management have been realized.
Figure 10 is the structural representation of another embodiment of Mobile Access Gateway of the present invention, as shown in figure 10, at Mobile Access Network of the present invention, shut on the basis of an embodiment, the relating module 13 of this Mobile Access Gateway can comprise: information is preserved submodule 21, association is set up submodule 23 and forwarded submodule 25.
Wherein, information is preserved submodule 21, if the described agent binding information receiving for notice receiver module 11 comprises the agent binding information of other Mobile Access Gateways that described terminal is relevant, described other Mobile Access Gateways are the Mobile Access Network Central Shanxi Plain that described terminal is relevant, gateway except the current Mobile Access Gateway that receives described agent binding notice message, the described forwarding associated record of self preserving does not comprise that the data retransmission of described other Mobile Access Gateways is associated, terminal iidentification in the agent binding information of described other Mobile Access Gateways that preservation receives, the interface identifier that described terminal provides for described other Mobile Access Gateways, the home network prefix that described other Mobile Access Gateways are described terminal distribution and the IP address of described other Mobile Access Gateways,
Submodule 23 is set up in association, for preserve described terminal iidentification, described interface identifier, described home network prefix and the described IP address that submodule 21 is preserved according to information, set up respectively terminal that described terminal iidentification the is corresponding home address corresponding with described other Mobile Access Gateways associated to the data retransmission between the IP address of described other Mobile Access Gateways, the described terminal home address corresponding with described other Mobile Access Gateways is described other Mobile Access Gateways home network prefix that is described terminal distribution and the combination of described interface identifier;
Forward submodule 25, for setting up submodule 23 in association, set up after described data retransmission association, if the source IP address in the IP message receiving or the object IP address home address corresponding with described other Mobile Access Gateways that be described terminal, the IP address to described other Mobile Access Gateways by described IP message repeating.Information is preserved submodule 21, association is set up submodule 23 and forwarded the method that submodule 25 is set up the data correlation between Mobile Access Gateway, specifically can be with reference to associated description and Fig. 1 b in the embodiment of the method for terminal access in heterogeneous network of the present invention.
Further, Mobile Access Gateway can also comprise:
Priority block 15, if comprise binding priority and the binding logo of the proxy binding register distribution that described local mobile anchor point is the Mobile Access Gateway that described terminal is relevant for described agent binding notice message, according to described binding priority, determine the priority of described data retransmission association; And/or, if comprising the proxy binding register that described local mobile anchor point is the Mobile Access Gateway that described terminal is relevant, described agent binding notice message distributes binding logo, according to described binding logo, determine the sign of described data retransmission association.Specifically can be with reference to associated description and Fig. 1 c in the embodiment of the method for terminal access in heterogeneous network of the present invention.
When the agent binding record of the terminal that the present embodiment has been preserved on local mobile anchor point occurs to upgrade, notice receiver module and receive the agent binding notice message that carries the agent binding record after renewal that described local mobile anchor point sends, the data retransmission that each submodule of relating module can be set up between the Mobile Access Gateway that terminal is relevant according to agent binding information is wherein associated, therefore, when being connected to a plurality of Mobile Access Gateway by a plurality of interfaces, between a plurality of interfaces, communicate with each other, make terminal in the IP of service application message, use any one to distribute to the IP address of terminal, and can transmit these IP messages of transmitting-receiving with any one interface, flexible and efficient many interfaces/many ownership management have been realized.
Figure 11 is the structural representation of a kind of embodiment of local mobile anchor point of the present invention, as shown in figure 11, this local mobile anchor point can comprise: notice sending module 31, for send the agent binding notice message of the agent binding record carrying after renewal to the relevant Mobile Access Gateway of described terminal, the agent binding record after described renewal comprises the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration.
Particularly, when terminal is used the interface of a plurality of different radio technology to be connected to network, if the agent binding of the terminal of having preserved on local mobile anchor point record upgrades, the notice sending module 31 of local mobile anchor point can send respectively to the relevant all Mobile Access Gateways of terminal the agent binding notice message of the agent binding record carrying after renewal; Each Mobile Access Gateway is after receiving agent binding notice message, according to the agent binding record after upgrading, comprise the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration, the data retransmission that can set up between self other Mobile Access Gateways relevant to terminal is associated.Follow-up, if this Mobile Access Gateway receives the IP message that terminal sends to other Mobile Access Gateways, can give corresponding Mobile Access Gateway by this IP message repeating.
When the agent binding record of the terminal that the present embodiment has been preserved on local mobile anchor point occurs to upgrade, notice the agent binding notice message that carries the agent binding record after renewal that sending module sends to each relevant Mobile Access Gateway, thereby the data retransmission of setting up between the Mobile Access Gateway that terminal is relevant is associated, therefore, when being connected to a plurality of Mobile Access Gateway by a plurality of interfaces, between a plurality of interfaces, communicate with each other, make terminal in the IP of service application message, use any one to distribute to the IP address of terminal, and can transmit these IP messages of transmitting-receiving with any one interface, flexible and efficient many interfaces/many ownership management have been realized.
Figure 12 is the structural representation of another embodiment of local mobile anchor point of the present invention, as shown in figure 12, on local mobile anchor point of the present invention, on the basis of an embodiment, this local mobile anchor point can also comprise: receiver module 41, module 43 is set up in binding and module 45 is returned in confirmation.
Wherein, receiver module 41, the agent binding update messages sending for receiving described Mobile Access Gateway, described agent binding comprises the terminal iidentification of described terminal, interface identifier that described terminal provides for described other Mobile Access Gateways, home network prefix that described Mobile Access Gateway is described terminal distribution and the IP address of described Mobile Access Gateway for updating message;
Confirm to return module 45, for set up module 43 in binding, set up between described home network prefix and the Care-of Address of described terminal after agent binding, to described Mobile Access Gateway, return to proxy binding acknowledgment messages, described proxy binding acknowledgment messages comprises described terminal iidentification, interface identifier, home network prefix, Care-of Address and described binding priority and binding logo, and indicates described notice sending module 31 to send described agent binding notice message.
Particularly, when terminal is used the interface of a plurality of different radio technology to be connected to network, receiver module 41 receives the agent binding update messages that described Mobile Access Gateway sends, the Care-of Address of module 43 using the IP address of described Mobile Access Gateway as described terminal set up in binding, setting up this Mobile Access Gateway is the agent binding between the home network prefix of terminal distribution and the Care-of Address of described terminal, and for this agent binding distributes, binds priority and binding logo according to UAD; If indication need to be returned to response in agent binding update messages, confirm that returning to module 45 can return to proxy binding acknowledgment messages to Mobile Access Gateway.Then, if the agent binding of the terminal of having preserved on local mobile anchor point record upgrades, the notice sending module 31 of local mobile anchor point can send respectively to the relevant all Mobile Access Gateways of terminal the agent binding notice message of the agent binding record carrying after renewal; Each Mobile Access Gateway is after receiving agent binding notice message, according to the agent binding record after upgrading, comprise the agent binding information that Mobile Access Gateway that described terminal is relevant is described endpoint registration, the data retransmission that can set up between self other Mobile Access Gateways relevant to terminal is associated.Follow-up, if this Mobile Access Gateway receives the IP message that terminal need to send to other Mobile Access Gateways, can give corresponding Mobile Access Gateway by this IP message repeating.
When the agent binding record of the terminal that the present embodiment has been preserved on local mobile anchor point occurs to upgrade, notice the agent binding notice message that carries the agent binding record after renewal that sending module sends to each relevant Mobile Access Gateway, thereby the data retransmission of setting up between the Mobile Access Gateway that terminal is relevant is associated, therefore, when being connected to a plurality of Mobile Access Gateway by a plurality of interfaces, between a plurality of interfaces, communicate with each other, make terminal in the IP of service application message, use any one to distribute to the IP address of terminal, and can transmit these IP messages of transmitting-receiving with any one interface, flexible and efficient many interfaces/many ownership management have been realized.
Figure 13 is the structural representation of another embodiment of Mobile Access Gateway of the present invention, as shown in figure 13, this Mobile Access Gateway can comprise: sending module 51, for sending agent binding update messages to local mobile anchor point, described agent binding update messages comprises IP address and the switching indication parameter of the new interface sign after terminal iidentification, switching, the new home network prefix that the new Mobile Access Gateway after switching is described terminal distribution, described new Mobile Access Gateway, and described switching indication parameter is set to switch; Or for the data forwarding channel after switching at described local mobile anchor point, be set to point to after described new Mobile Access Gateway, the IP message repeating that the follow-up described terminal receiving is sent by new interface is to described local mobile anchor point; Maybe send to the IP message of described terminal to be transmitted to described terminal by new interface the described local mobile anchor point receiving.
Particularly, when terminal is used the interface of a plurality of different radio technology to be connected to network, can preferentially use an interface to carry out data transmit-receive, when the switching of terminal generation interface being detected, the sending module 51 of Mobile Access Gateway sends agent binding update messages to local mobile anchor point, described agent binding update messages comprises terminal iidentification, new interface sign after switching, the new home network prefix that new Mobile Access Gateway after switching is described terminal distribution, the IP address of described new Mobile Access Gateway and switching indication parameter, wherein, switching indication parameter is set to switch, data forwarding channel after described local mobile anchor point switches is set to point to after described new Mobile Access Gateway, sending module 51 can send the follow-up described terminal receiving IP message repeating by described new interface is to described local mobile anchor point, or sends to the IP message of described terminal to be transmitted to described terminal by described new interface the described local mobile anchor point receiving.
The present embodiment sending module sends and to comprise the relevant information of new Mobile Access Gateway and to switch after the agent binding update messages that indication parameter is set to switch to local mobile anchor point, local mobile anchor point can comprise that the data forwarding channel after switching is set to point to new Mobile Access Gateway, new Mobile Access Gateway and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Figure 14 is the structural representation of another embodiment of Mobile Access Gateway of the present invention, as shown in figure 14, shuts on the basis of an embodiment at Mobile Access Network of the present invention, and further, this Mobile Access Gateway can also comprise:
Detection module 61, meets after switching condition for detection of being sent IP message and/or radio link quality detected to described new Mobile Access Gateway by new interface to described terminal, and indication sending module 51 sends described agent binding update messages.
Particularly, when terminal is used the interface of a plurality of different radio technology to be connected to network, can preferentially use an interface to carry out data transmit-receive, the switching of terminal from old interface to new interface can be initiated or network side is initiatively initiated for terminal, wherein, detection module 61 detects described terminal and sends IP message to described new Mobile Access Gateway, can judge that interface occurs to be switched; The detection module 61 of described new Mobile Access Gateway or old Mobile Access Gateway detects radio link quality and meets switching condition, can judge that interface occurs to be switched.When the detection module 61 of Mobile Access Gateway detects the switching of terminal generation interface, can indicate sending module 51 to send with the agent binding update messages that switches indication parameter to local mobile anchor point.
In addition, for reduce switched in the packet loss of transfer of data, further, the sending module 51 of this Mobile Access Gateway can also be for, the described old Mobile Access Gateway before switching sends switch indicating information;
Mobile Access Gateway can also comprise: receiver module 66, for sending after switch indicating information at sending module 51, receive the switching response message that described old Mobile Access Gateway returns; Or from the data forwarding channel between described old Mobile Access Gateway and described new Mobile Access Gateway, receive the IP message of the described terminal of described old Mobile Access Gateway forwarding.
Wherein, between new Mobile Access Gateway and old Mobile Access Gateway, can send mutually switch indicating information, associated owing to can setting up data retransmission between old Mobile Access Gateway and described new Mobile Access Gateway, have data forwarding channel, therefore new Mobile Access Gateway can lead to by this data retransmission the IP message of the terminal that receives old Mobile Access Gateway forwarding.
The present embodiment receiver module local mobile anchor point sends and to comprise the relevant information of new Mobile Access Gateway and to switch after the agent binding update messages that indication parameter is set to switch, local mobile anchor point can comprise that the data forwarding channel after switching is set to point to new Mobile Access Gateway, new Mobile Access Gateway and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize switching and flow mobility function between many interfaces, method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Figure 15 is the structural representation of another embodiment of local mobile anchor point of the present invention, and as shown in figure 15, this local mobile anchor point can comprise: receiver module 71 and module 73 is set.
Wherein, receiver module 71, the agent binding update messages sending for receiving new Mobile Access Gateway, described agent binding update messages comprises the IP address of the new interface sign after terminal iidentification, switching, the new home network prefix that described new Mobile Access Gateway is described terminal distribution, described new Mobile Access Gateway and switches indication parameter;
Particularly, when terminal is used the interface of a plurality of different radio technology to be connected to network, can preferentially use an interface to carry out data transmit-receive, when new Mobile Access Gateway detects the switching of terminal generation interface, the receiver module 71 of local mobile anchor point receives the agent binding update messages that new Mobile Access Gateway sends, if the switching indication parameter in agent binding update messages is set to switch, data forwarding channel corresponding to old home network prefix that the old Mobile Access Gateway of module 73 is described terminal distribution is set and is set to point to described new Mobile Access Gateway.
The present embodiment local mobile anchor point receives and comprises the relevant information of new Mobile Access Gateway and switch after the agent binding update messages that indication parameter is set to switch, can comprise that the data forwarding channel after switching is set to point to new Mobile Access Gateway, new Mobile Access Gateway and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
Figure 16 is the structural representation of another embodiment of local mobile anchor point of the present invention, and as shown in figure 16, on local mobile anchor point of the present invention, on the basis of an embodiment, this local mobile anchor point can also comprise: flow module 81 and/or priority block 83.
Wherein, flow module 81, if comprise flow descriptors for described agent binding update messages, according to described flow descriptors, the data forwarding channel of the business data flow switching is set to point to described new Mobile Access Gateway; In agent binding update messages, increase the stream description of service switchover data flow, can indicate which business data flow of local mobile anchor point that switching has occurred, thereby the data forwarding channel of the business data flow switching is set to point to described new Mobile Access Gateway, realize stream mobility (flowmobility) function.
The present embodiment local mobile anchor point receives and comprises the relevant information of new Mobile Access Gateway and switch after the agent binding update messages that indication parameter is set to switch, can comprise that the data forwarding channel after switching is set to point to new Mobile Access Gateway, new Mobile Access Gateway and the new interface of realization from switching carried out the transmitting-receiving of IP message, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal; Flow module arranges the data forwarding channel of business data flow by flow descriptors, the business of can take is switched as unit, and switching mode is flexible; The binding priority of the new Mobile Access Gateway after priority block can be switched is set to high priority, further guarantees handover success.
Figure 17 is the structural representation of another embodiment of local mobile anchor point of the present invention, and as shown in figure 17, this local mobile anchor point can comprise:
Detection module 91, for detection of sending IP message by new Mobile Access Gateway to network to terminal;
Module 93 is set, and for according to the detection of detection module 91, the data forwarding channel of described terminal is set to point to described new mobile mobile gateway from pointing to old Mobile Access Gateway.
Particularly, using PMIP to carry out in the heterogeneous network of mobile management, terminal can access respectively different networks by different interfaces, and terminal can adopt corresponding interface and Mobile Access Gateway to receive transmitting IP packet.The switching of terminal from old interface to new interface can initiatively be initiated for terminal, when detecting radio link quality, terminal changes, while meeting switching condition, terminal can select to be switched to new interface automatically, and user also can directly manually select to be switched to new interface in terminal.Selection is switched to after new interface, and the new Mobile Access Gateway that terminal accesses by new interface sends IP message to network, and new Mobile Access Gateway forwards the IP message receiving from terminal to local mobile anchor point.If the detection module 91 of local mobile anchor point detects terminal and sends IP message by new Mobile Access Gateway to network, the data forwarding channel that module 93 can described terminal is set and is set to point to new Mobile Access Gateway.
Further, module 93 being set can at least comprise with next sub-module:
Priority submodule 931, for according to the detection of detection module 91, the binding priority update in the agent binding information that described new Mobile Access Gateway is registered is high priority; And/or the binding priority update in the agent binding information that described old Mobile Access Gateway is registered is low priority;
Network prefix submodule 932, for according to the detection of detection module 91, data forwarding channel corresponding to old home network prefix that old Mobile Access Gateway is described terminal distribution is set to point to described new Mobile Access Gateway;
Indication message submodule 933, be used for according to the detection of detection module 91, to described new Mobile Access Gateway, send the agent binding Indication message of the agent binding information that comprises described new Mobile Access Gateway registration, to described old Mobile Access Gateway, send the renewal agent binding information of the agent binding information that comprises described old Mobile Access Gateway registration.
Wherein, the data forwarding channel of priority submodule 931, network prefix submodule 932, Indication message submodule 933 terminals be set to point to the concrete grammar of new Mobile Access Gateway can be with reference to Fig. 8 and associated description thereof.
In the present embodiment, when the detection module of local mobile anchor point detects terminal to new Mobile Access Gateway transmission IP message, module is set and can from pointing to old Mobile Access Gateway, be set to point to new Mobile Access Gateway by data forwarding channel, when terminal is used the interface of a plurality of different radio technology to be connected to network, can realize the switching between many interfaces, and the method is simple, do not need to revise IP stack and the IP layer service flow process of terminal.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. the method that heterogeneous network switches, is characterized in that, comprising:
New Mobile Access Gateway after switching sends agent binding update messages to local mobile anchor point, described agent binding update messages comprises IP address and the switching indication parameter of the new interface sign after terminal iidentification, switching, the new home network prefix that described new Mobile Access Gateway is described terminal distribution, described new Mobile Access Gateway, and described switching indication parameter is set to switch;
Described new Mobile Access Gateway sends switch indicating information to old Mobile Access Gateway;
Described new Mobile Access Gateway receives the switching response message that described old Mobile Access Gateway returns;
Described new Mobile Access Gateway receives the IP message of the described terminal of described old Mobile Access Gateway forwarding from the data forwarding channel between described old Mobile Access Gateway and described new Mobile Access Gateway, wherein, described data forwarding channel is that described new Mobile Access Gateway is set up according to the data retransmission association between the relevant Mobile Access Gateway of described terminal, and the data retransmission between the relevant Mobile Access Gateway of described terminal is associated as that described new Mobile Access Gateway sets up according to described agent binding update messages and the forwarding associated record self preserved;
The data forwarding channel of described new Mobile Access Gateway after described local mobile anchor point switches is set to point to after described new Mobile Access Gateway, and the IP message repeating that the follow-up described terminal receiving is sent by new interface is to described local mobile anchor point; Maybe send to the IP message of described terminal to be transmitted to described terminal by new interface the described local mobile anchor point receiving.
2. the method that heterogeneous network according to claim 1 switches, is characterized in that, the new Mobile Access Gateway after described switching comprises before sending agent binding update messages to local mobile anchor point:
Described new Mobile Access Gateway detects described terminal and to described new Mobile Access Gateway, sends IP message by new interface; Or
Described new Mobile Access Gateway or old Mobile Access Gateway detect radio link quality and meet switching condition.
3. a Mobile Access Gateway, is characterized in that, comprising:
Sending module, for sending agent binding update messages to local mobile anchor point, described agent binding update messages comprises IP address and the switching indication parameter of the new interface sign after terminal iidentification, switching, the new home network prefix that the new Mobile Access Gateway after switching is described terminal distribution, described new Mobile Access Gateway, and described switching indication parameter is set to switch; Or for the data forwarding channel after switching at described local mobile anchor point, be set to point to after described new Mobile Access Gateway, the IP message repeating that the follow-up described terminal receiving is sent by new interface is to described local mobile anchor point; Maybe send to the IP message of described terminal to be transmitted to described terminal by new interface the described local mobile anchor point receiving; Old Mobile Access Gateway before switching sends switch indicating information;
Receiver module, for sending after switch indicating information at described sending module, receive the switching response message that described old Mobile Access Gateway returns; Or from the data forwarding channel between described old Mobile Access Gateway and described new Mobile Access Gateway, receive the IP message of the described terminal of described old Mobile Access Gateway forwarding, wherein, described data forwarding channel is that described new Mobile Access Gateway is set up according to the data retransmission association between the relevant Mobile Access Gateway of described terminal, and the data retransmission between the relevant Mobile Access Gateway of described terminal is associated as that described new Mobile Access Gateway sets up according to described agent binding update messages and the forwarding associated record self preserved.
4. Mobile Access Gateway according to claim 3, is characterized in that, also comprises:
Detection module, meets after switching condition for detection of being sent IP message and/or radio link quality detected to described new Mobile Access Gateway by new interface to described terminal, indicates described sending module to send described agent binding update messages.
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| US9271193B2 (en) * | 2012-02-24 | 2016-02-23 | Intel Deutschland Gmbh | Care-of-address handover |
| CN102711202B (en) * | 2012-06-07 | 2014-11-26 | 北京锦鸿希电信息技术股份有限公司 | High-level-anchor-based wireless link soft switching processing method and system |
| CN103516699B (en) * | 2012-06-30 | 2016-11-23 | 华为技术有限公司 | A kind of realize the method for data flow handoff, Apparatus and system |
| CN103476029B (en) * | 2013-07-03 | 2016-12-07 | 广东迅通科技股份有限公司 | A kind of heterogeneous network soft route formula Adaptable System |
| CN103888288A (en) * | 2014-02-20 | 2014-06-25 | 北京优联实科信息科技有限公司 | Registration method, administrator, register and system |
| US9832716B2 (en) * | 2015-08-12 | 2017-11-28 | Google Llc | Switching between networks based on quality of available networks |
| CN111194085B (en) * | 2018-11-16 | 2023-12-26 | 维沃移动通信有限公司 | Control method of channel resources, terminal and communication network element |
| CN111314341B (en) * | 2020-02-14 | 2022-05-13 | 烽火通信科技股份有限公司 | Method and device for realizing authentication of Internet of things terminal equipment in multi-Internet of things gateway scene |
| CN113162858A (en) * | 2021-04-23 | 2021-07-23 | 中科云谷科技有限公司 | Flow forwarding system, equipment and method and Internet of things system |
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| CN102202286A (en) | 2011-09-28 |
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