CN101335989A - Smooth switching method and system of proxy mobile IP terminal - Google Patents

Smooth switching method and system of proxy mobile IP terminal Download PDF

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Publication number
CN101335989A
CN101335989A CNA2007101295382A CN200710129538A CN101335989A CN 101335989 A CN101335989 A CN 101335989A CN A2007101295382 A CNA2007101295382 A CN A2007101295382A CN 200710129538 A CN200710129538 A CN 200710129538A CN 101335989 A CN101335989 A CN 101335989A
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terminal
router
message
address
couple
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CNA2007101295382A
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Chinese (zh)
Inventor
赵元魁
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNA2007101295382A priority Critical patent/CN101335989A/en
Priority to PCT/CN2008/071489 priority patent/WO2009003406A1/en
Publication of CN101335989A publication Critical patent/CN101335989A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04Network layer protocols, e.g. mobile IP [Internet Protocol]

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

Abstract

The invention relates to a smooth switch method of supplying a mobile IP terminal, comprising: switching in a router to judge the terminal as a PMIP terminal, adopting source address corresponding to default router address to transmit information. The invention also relates to a smooth switch method of supplying a mobile IP terminal, comprising: switching in a router to judge the terminal as a PMIP terminal, informing the terminal through information including a marker indicating to modify a default router forcibly; when judging that the marker is present, the terminal is filled into a router list from the corresponding address obtained from the information, set as the default router address. The invention also relates to another two smooth switch systems of supplying a mobile IP terminal. The invention advances switch performance of switching PMIP terminals in the PMIP network, reduces switching time, and ensures service continuity.

Description

The smooth-switching method of proxy mobile IP terminal and system
Technical field
The present invention relates to moving communicating field, especially a kind of method that realizes that under the IPv6 framework proxy-mobile IP (Proxy Mobile IP is called for short PMIP) terminal takes over seamlessly, and take over seamlessly system.
Background technology
In future communications, people no longer are satisfied with basic voice and short message service, and can more tend to multimedia information interaction and various business experience.Be this demand that the next generation network of core can satisfy people with IPv6, under the IPv6 framework, consider by mobile management and solve user's demand to continuity in moving process, proposed the technical scheme of multiple mobile IP v 6 now.
In existing mobile I Pv6 technology, neighbor discovery mechanisms has appearred, specifically, when certain PMIP terminal enters into certain mobile anchor point gateway (Mobility Anchor Gateway, abbreviation MAG) in the territory, it is mutual that this MAG can carry out context with the former MAG of this PMIP terminal, realize the switching of terminal from former MAG to new MAG, and can send advertising of route message to this PMIP terminal, the information that in advertising of route message, includes the source router address, the PMIP terminal can receive that advertising of route message constructs router-list according to it, and selects one of them router as default router.If this default router can't be accessed, terminal then selects another router as new default router in router-list according to the preset selection rule.
Terminal is after receiving advertising of route message, judge according to the source address of this advertising of route message whether this router is identical with default router, if it is identical then this terminal continues to provide service, if it is different, whether the router source address of then judging this MAG is present in the router-list, if there is no, then insert in the router-list.But do not revise default router this moment, when switching is finished, because when default router does not change the MAG that finds this PMIP terminal into, the PMIP terminal just is in the state that can't work, at this moment must finish follow-up router and select flow process, judge earlier that promptly former default gateway can't visit, and then in router-list, select to visit successful router and be used as default router, can work on then.This process has seriously influenced the performance of handoffs of terminal, has prolonged switching time, and may cause service disruption.
Summary of the invention
The purpose of embodiments of the invention is smooth-switching method and the systems that propose a kind of proxy mobile IP terminal, can improve the performance of handoffs that switches the PMIP terminal in the PMIP network, reduces switching time, and guarantees the continuity of service.
For achieving the above object, embodiments of the invention provide a kind of smooth-switching method of proxy mobile IP terminal, may further comprise the steps:
When couple in router detects terminal and enters local domain,, judge whether this terminal is the terminal of supporting the proxy-mobile IP function according to network preconfigured information or the terminal related information obtained;
Judge that this terminal is when supporting the terminal of proxy-mobile IP function, described couple in router adopts with the corresponding source address of the employed default router address of this terminal and takes over seamlessly to finish to this terminal transmission message.
For achieving the above object, another embodiment of the present invention provides a kind of smooth-switching method of proxy mobile IP terminal, may further comprise the steps:
When couple in router detects terminal and enters local domain,, judge whether this terminal is the terminal of supporting the proxy-mobile IP function according to network preconfigured information or the terminal related information obtained;
Judge that this terminal is that described couple in router sends message to this terminal, comprises the sign that is used to represent the mandatory modification default router in this message when supporting the terminal of proxy-mobile IP function;
After this terminal receives described message, judge whether there being described sign in this message, when in judging this message, having described sign, will insert router-list, and described global address is set is default router address from the global address that described message obtains.
For achieving the above object, another embodiment of the present invention provides a kind of system that takes over seamlessly of proxy mobile IP terminal, comprising:
Detect judge module, when being used to detect terminal and entering local domain, obtain the relevant information of this terminal, and judge according to network preconfigured information or terminal related information whether this terminal is the terminal of supporting the proxy-mobile IP function;
First message transmission module, link to each other with described detection judge module, be used for judging that at described detection judge module this terminal is when supporting the terminal of proxy-mobile IP function, adopts with the corresponding address of the employed default router address of this terminal and sends message to this terminal.
For achieving the above object, an embodiment more of the present invention provides a kind of system that takes over seamlessly of proxy mobile IP terminal, comprising:
Detect judge module, when being used to detect terminal and entering local domain,, judge whether this terminal is the terminal of supporting the proxy-mobile IP function according to network preconfigured information or the terminal related information obtained;
Second message transmission module, link to each other with described detection judge module, be used for judging that at described detection judge module this terminal is when supporting the terminal of proxy-mobile IP function, to send message to this terminal, comprises the sign that is used to represent the mandatory modification default router in this message.
For achieving the above object, another embodiment of the present invention provides a kind of proxy mobile IP terminal, comprising:
The message sink module is used to receive the message that second message transmission module sends;
The sign judge module links to each other with described message sink module, is used for whether this message existed being used to represent that the sign of mandatory modification default router judges;
The list update module links to each other with described sign judge module, is used for will inserting router-list from the global address that described message obtains when judging that there is described sign in this message;
Module is set, links to each other with described sign judge module, be used for when judging that there is described sign in this message, it is default router address that described global address is set.
Based on technique scheme, embodiments of the invention are when the PMIP terminal that networks sends advertising of route message or dhcp message, adopted and the corresponding source address of default router address, terminal can obtain corresponding address according to source address when receiving message, and compare with this address and default router address, because this address is identical with default router address, terminal can think that couple in router does not change, therefore can not carry out follow-up router and select flow process, so just masked the step of terminal execution router selection operation, both reduced switching time, improved performance of handoffs accordingly, also, guaranteed the continuity of service owing to reduced switching time.Another embodiment of the present invention has increased in advertising of route message that sends to the PMIP terminal that networks or dhcp message forces sign, default router in the mandatory modification terminal, make terminal like this after switching, can communicate according to new default router, so also just need not terminal and carry out follow-up router selection flow process, both reduced switching time, improved performance of handoffs accordingly, also, guaranteed the continuity of service owing to reduced switching time.
Description of drawings
Fig. 1 is the schematic flow sheet of first embodiment of the smooth-switching method of proxy mobile IP terminal of the present invention.
Fig. 2 is the schematic flow sheet of second embodiment of the smooth-switching method of proxy mobile IP terminal of the present invention.
Fig. 3 is the schematic flow sheet of the 3rd embodiment of the smooth-switching method of proxy mobile IP terminal of the present invention.
Fig. 4 is the schematic flow sheet of the 4th embodiment of the smooth-switching method of proxy mobile IP terminal of the present invention.
Fig. 5 is the structural representation of first embodiment of the system that takes over seamlessly of proxy mobile IP terminal of the present invention.
Fig. 6 is the structural representation of second embodiment of the system that takes over seamlessly of proxy mobile IP terminal of the present invention.
Fig. 7 is the structural representation of an embodiment of proxy mobile IP terminal of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
As shown in Figure 1, be the schematic flow sheet of first embodiment of the smooth-switching method of proxy mobile IP terminal of the present invention.The flow process of present embodiment comprises:
If certain terminal of step 101 enters in the local domain of certain couple in router or starts shooting in the local domain of certain couple in router, this couple in router can detect this terminal and enter into local domain;
Step 102, this couple in router judge according to network preconfigured information of being obtained or terminal related information whether terminal is the terminal of supporting the PMIP function, it is the PMIP terminal, if terminal is supported the PMIP function, then execution in step 103, and for the terminal of not supporting the PMIP function, because the PMIP terminal that focuses on present embodiment realizes the operation take over seamlessly, so the changing method of the terminal outside the PMIP terminal just do not described in detail here, and these changing methods all can adopt prior art;
Step 103, couple in router adopt and the corresponding source address of default router address of this terminal sends advertising of route message to this terminal, take over seamlessly thereby finish.
In the present embodiment, couple in router in the step 103 adopts and the corresponding source address of default router address of this terminal sends advertising of route message to this terminal, this message can be dhcp message, after this PMIP terminal receives, because it is corresponding with default router address to obtain source address information, terminal can think that couple in router does not change, therefore still by normal operation flow operation, but in fact its couple in router has been changed into and the corresponding new couple in router in this terminal zone of living in, because for the PMIP terminal, no matter what default router address is, the data of its transmission can and be handled by new router interception, and handover operation is in fact finished by network side.Because the imperceptible network of terminal switches, therefore do not need to carry out the operation of selecting new default router, both reduced switching time like this, also improved the performance of handoffs of terminal, and overcome in the prior art owing to the oversize defective that may cause service disconnection switching time.
Obtain the source address information identical, can adopt following several scheme: adopt the source address of the unified address in overall situation unification or part as advertising of route message or dhcp message with default router address; When using terminal initial to network, the advertising of route message that couple in router sent or the source address of dhcp message send to the advertising of route message of terminal or the source address of dhcp message as new couple in router; Use the link-local address of the home agent (Home Agent is called for short HA) of terminal to send to the advertising of route message of terminal or the source address of dhcp message as new router.
In the present embodiment, couple in router need obtain to be used to construct the operation of the address identical with the employed default router of terminal, for example the global address of the former default router relevant with terminal and/or link address can be transmitted to new couple in router by context transfer mechanism or by network storage solid element by former default router, it should be noted that obtain manner is not limited to this dual mode.
The unified source address that promptly is provided with in whole network of the so-called overall situation is certain fixed address, because the data that terminal is sent all can be tackled with the couple in router that covers zone of living in, for terminal, adopting what address is not very important as source address, and is set to unified address with very convenient.It is local unified that promptly in certain network segment or certain zone source address to be set be fixed address.Adopt this scheme to be applicable to P2P link mode and shared link pattern simultaneously,,, also still be suitable for unified address of the overall situation or local unified address even adopt the PMIP terminal of different model or specification especially for the shared link pattern.
If the source address of route notice message sends to the source address of the message of terminal when adopting initial network entry as new couple in router, perhaps use home agent (the Home Agent of terminal, be called for short HA) address or link-local address send to the source address of the message of terminal as new router, then be applicable to the P2P link mode.
As shown in Figure 2, be the schematic flow sheet of second embodiment of the smooth-switching method of proxy mobile IP terminal of the present invention.Compare with a last embodiment, the step 103 of present embodiment is specially:
The route request information that step 103a, couple in router receiving terminal send;
Step 103b, couple in router adopt the source address identical with the default router address of this terminal to this terminal singlecast router notice message.
Also can adopt the step 103c among Fig. 3, promptly couple in router is to broadcasting advertising of route message of the terminal in the network layer or dhcp message, and this advertising of route message or dhcp message also adopt and the corresponding source address of the default router address of this terminal.For the IPv6 network, couple in router adopts the interface ID in the employed default router address of this terminal to constitute link-local address and broadcasts advertising of route message or dhcp message as source address to this terminal.And for the IPv4 network, couple in router adopts the employed default router address of this terminal to broadcast advertising of route message or dhcp message as source address to this terminal.In addition, couple in router can also adopt with the employed link layer address of this terminal and send advertising of route message or dhcp message as source address to this terminal.
Do not carry out the operation of selecting new default router address in order to make terminal, can also directly revise router-list, as shown in Figure 4, be the schematic flow sheet of the 4th embodiment of the smooth-switching method of proxy mobile IP terminal of the present invention, present embodiment may further comprise the steps:
Step 201, couple in router sense terminals enter local domain;
Step 202, couple in router judge according to network preconfigured information or the terminal related information obtained whether this terminal is the terminal of supporting the proxy-mobile IP function;
If it is when supporting the terminal of proxy-mobile IP function, to send message to this terminal that step 203 couple in router is judged this terminal, comprise the sign that is used to represent the mandatory modification default router in this message;
After step 204, this terminal receive described message, judge that to whether there being this sign in this message if there is this sign, then execution in step 205, otherwise still carry out according to normal switching flow, and end operation;
Step 205, this terminal will be inserted router-list from the global address that message obtains, and described global address is set is default router address.
The global address here can be directly constructs according to the source address and the prefix of this message, also can directly in this message, carry global address or link address corresponding to default router, the message here can be advertising of route message, can directly extract like this corresponding to the global address of default router or by the global address that described link address generates and insert router-list.
Couple in router can be to receive the route request information that this terminal is initiated by couple in router earlier to the operation that this terminal sends message, sends advertising of route message to this terminal then, perhaps directly broadcasts advertising of route message by couple in router to this terminal.Also can be couple in router after terminal is initiated the DHCP request, in issuing the dhcp response message of terminal, comprise the sign and the corresponding default router address of expression mandatory modification default router.
Switch when finishing in the prior art, default router is because unmodified so can not use, and present embodiment has added flag bit in advertising of route message, be used for the mandatory modification default router, so just make terminal when being checked through couple in router and changing, just finish the modification of default router, and do not need to carry out the flow process that router is selected, thus reduced switching time, avoided the service disruption problem that may cause because of switching delay.
If terminal can not be supported this flag bit, send the information whether this terminal supports the characteristic of this mandatory modification default router to couple in router in the time of then can or receiving advertising of route message when networking, this information can be carried in route requests.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Smooth-switching method based on above-mentioned proxy mobile IP terminal, the present invention also provides the embodiment of the system that takes over seamlessly of proxy mobile IP terminal, as shown in Figure 5, be the structural representation of first embodiment of the system that takes over seamlessly of proxy mobile IP terminal of the present invention, present embodiment comprises with lower module: detect judge module 1, first message transmission module 2.When wherein detecting judge module 1 and being used to detect terminal and entering local domain, judge according to network preconfigured information that obtains or terminal related information whether this terminal is the terminal of supporting the proxy-mobile IP function; First message transmission module 2 links to each other with detection judge module 1, is used for judging that at detection judge module 1 this terminal is that the corresponding source address of default router address of employing and this terminal sends message to this terminal when supporting the terminal of proxy-mobile IP function.
Present embodiment is when the PMIP terminal that networks sends message, adopted and the corresponding source address of default router address, when receiving message, terminal can judge source address, because the address is corresponding, terminal can think that couple in router does not change, therefore can not carry out follow-up router and select flow process, so just masked the step of terminal execution router selection operation, both reduced switching time, improved performance of handoffs accordingly, also, guaranteed the continuity of service owing to reduced switching time.
As shown in Figure 6, be the structural representation of second embodiment of the system that takes over seamlessly of proxy mobile IP terminal of the present invention, present embodiment comprises with lower module: detect judge module 1, second message transmission module 4.When wherein detecting judge module 1 and being used to detect terminal and entering local domain,, judge whether this terminal is the terminal of supporting the proxy-mobile IP function according to network preconfigured information or the terminal related information obtained; Second message transmission module 4 links to each other with detection judge module 1, and being used for detecting judge module 1 this terminal of judgement is when supporting the terminal of proxy-mobile IP function, to this terminal transmission message, comprises the sign that is used to represent the mandatory modification default router in this message.What announced in the message here also can be link-local address, and terminal constructs the address of the default router that will use together with the prefix information in the message of this address and correspondence and is provided with.
Corresponding to above-mentioned second embodiment, the present invention also provides a kind of embodiment of proxy mobile IP terminal, as shown in Figure 7, is the structural representation of an embodiment of proxy mobile IP terminal of the present invention, comprise: message sink module 5 is used to receive the message that second message transmission module sends; Sign judge module 6 links to each other with message sink module 5, is used for whether this message existed being used to represent that the sign of mandatory modification default router judges; List update module 7 links to each other with sign judge module 6, is used for will inserting router-list from the global address that described message obtains when judging that there is described sign in this message; Module 8 is set, links to each other with sign judge module 6, be used for when judging that there is described sign in this message, it is default router address that described global address is set.
Because having increased, couple in router forces sign in the message that sends to the PMIP terminal that networks, make that terminal mandatory modification default router address is the address of couple in router, thereby when terminal after switching, can communicate according to new default router, so also just need not terminal and carry out follow-up router selection flow process, both reduced switching time, improved performance of handoffs accordingly, also, guaranteed the continuity of service owing to reduced switching time.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.

Claims (17)

1, a kind of smooth-switching method of proxy mobile IP terminal is characterized in that, may further comprise the steps:
When couple in router detects terminal and enters local domain,, judge whether this terminal is the terminal of supporting the proxy-mobile IP function according to network preconfigured information or the terminal related information obtained;
Judge that this terminal is when supporting the terminal of proxy-mobile IP function, described couple in router adopts with the corresponding source address of the employed default router address of this terminal and takes over seamlessly to finish to this terminal transmission message.
2, smooth-switching method according to claim 1 is characterized in that, described couple in router adopts with the corresponding source address of the employed default router address of this terminal and is specially to the operation that this terminal sends message:
Described couple in router receives the route request information that this terminal is initiated, and adopts then with the corresponding source address of the employed default router address of this terminal and sends advertising of route message to this terminal.
3, smooth-switching method according to claim 1 is characterized in that, described couple in router adopts with the corresponding source address of the employed default router address of this terminal and is specially to the operation that this terminal sends message:
Couple in router in the IPv6 network adopts the link-local address that is made of the interface ID in the employed default router address of this terminal to broadcast advertising of route message as source address to this terminal.
4, smooth-switching method according to claim 1 is characterized in that, described couple in router adopts with the corresponding source address of the employed default router address of this terminal and is specially to the operation that this terminal sends message:
Couple in router in the IPv4 network adopts the employed default router address of this terminal to broadcast advertising of route message as source address to this terminal.
5, smooth-switching method according to claim 1 is characterized in that, comprises that also described couple in router obtains the described operation that is used to construct the address identical with the used default router of terminal, is specially:
Obtain or obtain by the mechanism of the context transfer between couple in router by the transfer of network storage solid element.
6, according to the arbitrary described smooth-switching method of claim 2-5, it is characterized in that, when if the default router of this terminal adopts the source address that the overall situation is unified or the part is unified, then described couple in router adopts corresponding source address to send advertising of route message to this terminal.
7, according to the arbitrary described smooth-switching method of claim 2-5, it is characterized in that, when if the address of the default router of this terminal is the address of home agent, then described couple in router adopts this home agent appropriate address or link-local address to send advertising of route message to this terminal.
According to the arbitrary described smooth-switching method of claim 2-5, it is characterized in that 8, described couple in router is transmitted global address and/or link address corresponding to default router by the authentication and authorization charging entity from the former default router of described terminal.
9, a kind of smooth-switching method of proxy mobile IP terminal is characterized in that, may further comprise the steps:
When couple in router detects terminal and enters local domain,, judge whether this terminal is the terminal of supporting the proxy-mobile IP function according to network preconfigured information or the terminal related information obtained;
Judge that this terminal is that described couple in router sends message to this terminal, comprises the sign that is used to represent the mandatory modification default router in this message when supporting the terminal of proxy-mobile IP function;
After this terminal receives described message, judge whether there being described sign in this message, when in judging this message, having described sign, will insert router-list, and described global address is set is default router address from the global address that described message obtains.
10, smooth-switching method according to claim 9, it is characterized in that, described message also comprises corresponding to the global address of default router or link address, when in judging this message, having described sign, from described message, extract described global address or insert router-list, and it is set to default router address by the global address that described link address generates.
11, smooth-switching method according to claim 9, it is characterized in that, described will being specially from the operation that the global address that described message obtains is inserted router-list: source address and prefix according to described message construct global address, and described global address is inserted router-list.
12, smooth-switching method according to claim 9 is characterized in that, described couple in router is specially to the operation that this terminal sends message:
Described couple in router receives the route request information that this terminal is initiated, and sends advertising of route message to this terminal then, comprises the sign that is used to represent the mandatory modification default router in this advertising of route message.
13, smooth-switching method according to claim 9 is characterized in that, described couple in router is specially to the operation that this terminal sends message:
Described couple in router comprises the sign and the corresponding default router address that are used to represent the mandatory modification default router to this terminal broadcasting advertising of route message in this advertising of route message.
14, smooth-switching method according to claim 9 is characterized in that: described couple in router is specially to the operation that this terminal sends message:
Described couple in router comprises the sign and the corresponding default router address of expression mandatory modification default router in issuing the dhcp response message of terminal after terminal is initiated the DHCP request.
15, a kind of system that takes over seamlessly of proxy mobile IP terminal is characterized in that, comprising:
Detect judge module, when being used to detect terminal and entering local domain, judge according to network preconfigured information that obtains or terminal related information whether this terminal is the terminal of supporting the proxy-mobile IP function;
First message transmission module, link to each other with described detection judge module, be used for judging that at described detection judge module this terminal is when supporting the terminal of proxy-mobile IP function, adopts with the corresponding address of the employed default router address of this terminal and sends message to this terminal.
16, a kind of system that takes over seamlessly of proxy mobile IP terminal is characterized in that, comprising:
Detect judge module, when being used to detect terminal and entering local domain,, judge whether this terminal is the terminal of supporting the proxy-mobile IP function according to network preconfigured information or the terminal related information obtained;
Second message transmission module, link to each other with described detection judge module, be used for judging that at described detection judge module this terminal is when supporting the terminal of proxy-mobile IP function, to send message to this terminal, comprises the sign that is used to represent the mandatory modification default router in this message.
17, a kind of proxy mobile IP terminal is characterized in that, comprising:
The message sink module is used to receive the message that second message transmission module sends;
The sign judge module links to each other with described message sink module, is used for whether this message existed being used to represent that the sign of mandatory modification default router judges;
The list update module links to each other with described sign judge module, is used for will inserting router-list from the global address that described message obtains when judging that there is described sign in this message;
Module is set, links to each other with described sign judge module, be used for when judging that there is described sign in this message, it is default router address that described global address is set.
CNA2007101295382A 2007-06-29 2007-06-29 Smooth switching method and system of proxy mobile IP terminal Pending CN101335989A (en)

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PCT/CN2008/071489 WO2009003406A1 (en) 2007-06-29 2008-06-30 A method and system of smooth handoff for proxy mobile ip terminal

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