CN101754168B - Method, device and system for switching among multiple interfaces of mobile node - Google Patents
Method, device and system for switching among multiple interfaces of mobile node Download PDFInfo
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- CN101754168B CN101754168B CN200810239017A CN200810239017A CN101754168B CN 101754168 B CN101754168 B CN 101754168B CN 200810239017 A CN200810239017 A CN 200810239017A CN 200810239017 A CN200810239017 A CN 200810239017A CN 101754168 B CN101754168 B CN 101754168B
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Abstract
The invention discloses a method, a device and a system for switching among multiple interfaces of a mobile node. The method comprises that: a mobile access gateway sends a registration request message comprising identification information of an access port to a local mobile agent corresponding to the mobile node when detecting access of the port of the mobile node; the local mobile agent receives the registration request message and acquires address information corresponding to a registered port of the mobile node according to the identification information of the access port; and the local mobile agent allocates the address information corresponding to the registered port of the mobile node to the access port of the mobile node. By using the simple method, each embodiment of the invention can judge switching among the multiple interfaces, reduces delay of switching, can effectively solve the defects of complex method that MAG judges, sets and switches the indication domain, switching delay and the like in the prior art.
Description
Technical field
The present invention relates to wireless core network technology in the communications field, particularly, the changing method between multiple interfaces of mobile node, Apparatus and system.
Background technology
The Internet engineering work group (Internet Engineering Task Force; Abbreviation IETF) proxy mobile IPv 6 (Proxy Mobile IPv6 has been proposed in 2007; Be called for short PMIPv6) agreement, in proxy-mobile IP, mobile node self is not participated in any Signalling exchange relevant with mobility; But realize management function to mobile node by network, this can alleviate the burden of mobile node.Concerning mobile node; Whole network all is equivalent to a link; Its any one access in network all is equivalent in home network, insert; Make mobile node use the home address of " forever " when in network, moving, mobile node can move freely in network, and not interrupt communication is professional.Mobile IP technology is to providing transparent support more than the IP layer: no matter be transmission control protocol (TCP) connection of maintenance activity; Or UDP (User Datagram Protocol; Be called for short UDP) port binding, can use identical IP address all the time and need not consider the realization of bottom in the process of node motion.
At the Draft:Multiple of IETF Interface Support with Proxy Mobile IPv6 (disclosed IETF Draft; Netlmm working group from IETF; The author is people such as V.Devarapalli, and be August 22,2008 date issued) propose in the proxy mobile IPv 6 network; The scheme that mobile node (Mobile Node is called for short MN) switches between the port of different access technologies.
Fig. 1 is that mobile node in the prior art (MN) uses port if1 through the sketch map of Mobile Access Gateway (Mobile Access Gateway is called for short MAG) like MAG1 access MIPV6 territory among Fig. 1, specifically can be referring to Fig. 4 of the 10th page in above-mentioned draft.MN will use port if2 to insert same MIPV6 territory through MAG2 for a certain reason, and possibly break off the connection on the port if simultaneously.(the Local Mobile Agent of local mobile agent after switching; Be called for short LMA) to distribute to the if2 network prefix identical with if1; Fig. 2 is that MN uses the sketch map of port if2 through MAG2 access MIPV6 territory among Fig. 1, specifically can be referring to Fig. 5 of the 11st page in above-mentioned draft.
Be to realize using after the port translation function of same address, LMA need know that this is the switching of between the different port of MN, carrying out in the prior art, at MAG2 when LMA sends agent binding update; The identifier that must comprise port switches the indication territory with being provided with; After LMA received the agent binding update of MAG2, the clauses and subclauses of procuratorial work banding cache were with the binding deletion of if1; Give if2 with originally binding the address assignment of giving if1, and upgraded the clauses and subclauses of its banding cache.
How MAG judges whether to be provided with the method for switching the indication territory in the prior art has following several kinds of solutions: first method is to obtain from original MAG; This needs can intercom mutually between MAG, and MAG2 is through obtaining a contextual information that switches about MN with communicating by letter of MAG1; Second method is when MN inserts; Part as the access security checking; L2 identification information through in the AAA checking, carrying the if2 port is informed the information that MAG2 switches about port; But this method can not be worked under the situation that perhaps aaa server is not used in aaa server storage port information not; The third method is " SETUP " information that when new Mobile Access Gateway informs that himself is switching, existing session connection and port handover information is changed into the identification information (L2) of new if2 port by MN; And issue new MAG2; After MAG2 receives this information, indicate the setting of indicating bit accordingly.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem and defective:
1, in the prior art; Insert same MIPV6 territory when mobile node will use different ports, need carry out port when switching; LMA must know that this is a switching between the different port of mobile node; Thereby MAG must be provided with when LMA sends agent binding update and switch the indication territory, and known MAG judges whether to be provided with three kinds of methods more complicated of switching the indication territory, needs extra particular requirement;
2, the scheme of draft proposition just is applicable to the scene of Agent IP v6, is not suitable for the scene of Agent IP v4;
3. MAG judges whether to be provided with when switching the indication territory and may add new Signalling exchange in the prior art, and mutual with original MAG for example with the mutual of aaa server or mutual with MN, thereby causes extra switching delay.
Summary of the invention
First purpose of the present invention is to judge that to MAG in the prior art switching is set indicates defectives such as the method more complicated in territory, switching delay; A kind of multiple interfaces of mobile node method for switching between is proposed; To realize judging the switching between many interfaces, reduce the delay of switching with simple method.
Second purpose of the present invention is to judge that to MAG in the prior art in the prior art switching is set indicates defectives such as the method more complicated in territory, switching delay; A kind of policy service device is proposed; For LMA provides the registered port corresponding identification of mobile node information, so that realize judging the switching between many interfaces, the delay that reduction is switched with simple method.
The 3rd purpose of the present invention is to judge that to MAG in the prior art in the prior art switching is set indicates defectives such as the method more complicated in territory, switching delay; A kind of local mobile agent LMA is proposed; To realize judging the switching between many interfaces, reduce the delay of switching with simple method.
The 4th purpose of the present invention is to judge that to MAG in the prior art switching is set indicates defectives such as the method more complicated in territory, switching delay; Switched system between a kind of multiple interfaces of mobile node is proposed; To realize judging the switching between many interfaces, reduce the delay of switching with simple method.
For realizing above-mentioned first purpose, according to an aspect of the present invention, the changing method between a kind of multiple interfaces of mobile node is provided.
Changing method according between the multiple interfaces of mobile node of the embodiment of the invention comprises: when Mobile Access Gateway detected the port access of mobile node, the local mobile agent corresponding to mobile node sent the login request message that comprises access port identifier information; The LMA that mobile node is corresponding receives login request message, according to access port identifier information, obtains the registered port corresponding address of this mobile node information; LMA gives the registered port corresponding address of mobile node information distribution the access interface of mobile node.
Preferably; According to access port identifier information; The operation that obtains the registered port corresponding address of mobile node information can comprise: LMA is according to access port identifier information; Inquiry stores the strategy file of mobile node and the corresponding identification information of each port thereof, obtains the registered port corresponding identification of mobile node information; LMA from storing the record cache of each port identification information and bind address information thereof, obtains the registered port corresponding address of mobile node information according to the registered port corresponding identification of mobile node information.
Preferably, above-mentioned strategy file can be database or the file that is integrated in LMA, and perhaps strategy file is and LMA database or the file in the server independently mutually.
Preferably, mobile node can carry out Signalling exchange through DHCP signaling and Mobile Access Gateway, when MAG detects the access of mobile node, sends login request message to LMA.
For realizing above-mentioned second purpose, according to another aspect of the present invention, a kind of policy service device is provided.
Policy service device according to the embodiment of the invention comprises: memory module is used to store the strategy file of the corresponding identification information of mobile node and each port thereof; Update module is used for strategy file is upgraded; Communication module is used to receive the query requests that comprises mobile node access port identifier information, from strategy file, obtains the registered port corresponding identification of mobile node information.
Above-mentioned communication module can comprise: receive submodule, be used to receive query requests and strategy file lastest imformation; Processing sub is used for the access port identifier information that comprises according to query requests, and the query strategy file obtains the registered port corresponding identification of mobile node information, and update module is upgraded; Send submodule, be used to send the registered port corresponding identification of mobile node information.
For realizing above-mentioned the 3rd purpose, according to another aspect of the present invention, a kind of LMA is provided.
LMA according to the embodiment of the invention comprises: receiver module is used to receive the login request message that mobile node comprises access port identifier information; Query processing module is used for according to access port identifier information, obtains the registered port corresponding address of mobile node information; Sending module is used for the registered port corresponding address of mobile node information distribution is sent to mobile node.
Among the above-mentioned LMA, can also comprise: memory module is used to store the strategy file of the corresponding identification information of mobile node and each port thereof.
For realizing above-mentioned the 4th purpose, according to another aspect of the present invention, switched system between a kind of multiple interfaces of mobile node is provided.
According to switched system between the multiple interfaces of mobile node of the embodiment of the invention, comprising: mobile node, comprise a plurality of ports, when being used to carry out the port switching port, send the access request message that comprises access port identifier information; MAG is used for mobile node is inserted detection, sends the login request message that comprises access port identifier information; LMA is used for according to access port identifier information, and the registered port corresponding identification of inquiry mobile node information obtains registered port corresponding address information, the registered port corresponding address of mobile node information distribution is given the access interface of mobile node; The policy service device is positioned at LMA, perhaps is and LMA server independently mutually, is used to store the corresponding identification information of mobile node and each port thereof.
Changing method between the multiple interfaces of mobile node of various embodiments of the present invention, policy service device, LMA and system; When mobile node when a port switches to another port, LMA can obtain registered port corresponding identification information according to this access port identifier information of mobile node; And then obtain the address information of registered port; And, therefore, can realize that mobile node moves the home address that uses " forever " when switching in network for the access interface of applying for the registration of distributes the identical address of port of using with its affiliated mobile node; Mobile node can move freely in network, and not interrupt communication is professional.
In the various embodiments of the present invention; LMA can according to be stored in self or with its strategy file independently; The information that has comprised mobile node and corresponding each port thereof in this strategy file, therefore, the login request message that LMA can confirm through inquiry to receive is from another port of the mobile node of having registered; Thereby judge the switching that this is a multiport, and then the port address of this mobile node of registered use is distributed on the access interface of this mobile node.Compared with prior art; Various embodiments of the present invention provide a kind of very simple method to make LMA obtain the handover information between the mobile node different port; And, proxy-mobile IP technology that can be compatible common when switching owing to mobile node, therefore; Can not cause extra delay, can effectively solve to utilize MAG to judge in the prior art and be provided with and switch defectives such as indicating territory complicacy, switching delay.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is that mobile node uses port if1 to insert the sketch map in MIPV6 territory through MAG1 in the prior art;
Fig. 2 is that mobile node MN uses port if2 to insert the sketch map in MIPV6 territory through MAG2 among Fig. 1;
Fig. 3 is according to the changing method flow chart between the multiple interfaces of mobile node of the embodiment of the invention one;
Fig. 4 is according to the changing method flow chart between the multiple interfaces of mobile node of the embodiment of the invention two;
Fig. 5 (a)-Fig. 5 (b) is the application scenarios sketch map according to the changing method between the multiple interfaces of mobile node of the embodiment of the invention three;
Fig. 6 is for utilizing the concrete application signalling diagram of the changing method between multiple interfaces of mobile node under the application scenarios of Fig. 5;
Fig. 7 is the policy service apparatus structure sketch map according to the embodiment of the invention four;
Fig. 8 is the policy service apparatus structure sketch map according to the embodiment of the invention five;
Fig. 9 is the local mobile agent internal structure sketch map according to the embodiment of the invention six;
Figure 10 is the local mobile agent internal structure sketch map according to the embodiment of the invention seven;
Figure 11 is according to the switched system structural representation between the multiple interfaces of mobile node of the embodiment of the invention eight.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
According to the embodiment of the invention, the changing method between a kind of multiple interfaces of mobile node is provided, through Fig. 3-Fig. 6 the changing method between multiple interfaces of mobile node of the present invention is illustrated below.
Embodiment one
Fig. 3 is according to the changing method flow chart between the multiple interfaces of mobile node of the embodiment of the invention one.As shown in Figure 3, present embodiment comprises:
Step S100:MAG detects whether ports having and inserts, and is execution in step S102 then; Otherwise continue to detect execution in step S100;
Step S102: send the login request message that comprises access port identifier information;
Step S104:LMA receives this login request message, according to access port identifier information, obtains the registered port corresponding address of mobile node information;
Step S106:LMA gives the registered port corresponding address of mobile node information distribution the access interface of this mobile node.
In the present embodiment; When mobile node when a port switches to another port, LMA can obtain registered port corresponding identification information according to this access port identifier information of mobile node; And then obtain the address information of registered port; And, therefore, can make mobile node in network, move the home address that uses " forever " when switching for the access interface of applying for the registration of distributes the identical address of port of using with its affiliated mobile node; Mobile node can move freely in network, and not interrupt communication is professional.
Embodiment two
Fig. 4 is according to the changing method flow chart between the multiple interfaces of mobile node of the embodiment of the invention two.As shown in Figure 4, present embodiment comprises:
Step S200: mobile node judges whether to carry out port and switches, and is execution in step S202 then; Otherwise continue to detect execution in step S200;
Step S202: send the access request message that comprises access port identifier information;
Step S204: Mobile Access Gateway MAG inserts detection to this movable contact;
Step S208:MAG finds the access of MN, and the register requirement of correspondence is sent to LMA;
Step S210:LMA is according to the access port identifier information of carrying in the login request message, and inquiry stores the strategy file of mobile node and the corresponding identification information of each port thereof, obtains the registered port corresponding identification of mobile node information;
Step S212:LMA from storing the record cache of each port identification information and bind address information thereof, obtains the registered port corresponding address of mobile node information according to the registered port corresponding identification of mobile node information;
Step S214:LMA gives MAG with registered port corresponding address information-reply;
Step S216:MAG gives access interface with the registered port corresponding address of mobile node information distribution.
In the present embodiment, the strategy file of LMA inquiry can be to be integrated in the inner database of LMA, file etc., or with the LMA independently database in the server, file etc. mutually.Strategy file can be arranged in advance among the LMA or with LMA mutually independently in the server, and carry out regular update.
In the present embodiment; LMA can according to be stored in self or with its strategy file independently; The login request message of confirming to receive is from another port of the mobile node of having registered; Thereby judge the switching that this is a multiport, and then the port address of this mobile node of registered use is distributed on the access interface of this mobile node.Compared with prior art; The changing method of present embodiment uses simple method can make LMA obtain the handover information between the mobile node different port, can compatible common proxy-mobile IP technology be elaborated when following Fig. 5 (a)-Fig. 6 embodiment also switches mobile node.The present embodiment changing method is not simply, can cause extra delay; In the expection of performance of switching and speed; Can obviously not increase and postpone and complexity; Performance can effectively not solve to utilize MAG to judge in the prior art and be provided with and switch defectives such as indicating territory complicacy, switching delay than the poor performance of other multiport switching yet.
Embodiment three
Fig. 5 (a)-Fig. 5 (b) is the application scenarios sketch map according to the changing method between the multiple interfaces of mobile node of the embodiment of the invention three.Shown in Fig. 5 (a).In proxy mobile IP networks, mobile node MN has 2 physical network card eth0 and eth1, is connected respectively to two Mobile Access Gateway MAG0 and MAG1.MN is last to have moved various application layer services, like FTP, Http, Streaming Media etc.Opposite end communication node in the network (Communication Node is called for short CN) can communicate through IP address, local and the MN of MN, and visit MN goes up the various application layer services that are provided with.
Shown in Fig. 5 (b), suppose MN some through in two ports, for example eth0; Be linked on the MAG0, and then be connected in the external network, this moment for a certain reason; MN need carry out the switching of port, switches to Eth1 from Eth0, and corresponding MAG also switches to MAG1 by MAG0; But hope that the respective services of the last operation of MN can not interrupted after MN carries out this kind switching, CN still can use same home address that MN is conducted interviews.The reason that MN carries out the port switching possibly include but not limited to: the network that port inserted of the original access network of MN for a certain reason; Fault etc. for example; Produced disconnection, MN need launch another port, and original upper layer application is transferred on the new port; Another kind of application scenarios is under the situation of heterogeneous network, and for example two of MN one of ports connect 3G network, and one connects WLan, from the consideration of speed and expense, but in the WLan time spent, connection is transferred to break off the 3G connection on the WLan again.
Fig. 6 is for utilizing the concrete application signalling diagram of the changing method between multiple interfaces of mobile node of the present invention under the application scenarios of Fig. 5.As shown in Figure 6, present embodiment comprises:
Step 600:MN perceives the network at MAG under the port that will insert (below be called eth1) (below be called MAG1) place;
Step 602:MN sends " DHCP Discover " message through eth1 to MAG1;
Step 604:MAG1 receives " DHCP Discover " message, begins to carry out registration process, and MAG1 sends login request message message " PBU " to LMA;
After step 606:LMA receives login request message; According to the port identification information in " PBU " " Interface Identifier " query strategy file; Thereby learn that MN has two interfaces (interface); Promptly original port that uses (below be called eth0) and eth1, and can obtain the interface identifier information " Interface Identifier " of eth0;
Step 608:LMA searches the corresponding IP address of interface identifier information of eth0 in record cache;
Step 610:LMA sends registration to MAG1 and replys " PBA ", and the specified therein home address of distributing to eth1 is identical with the home address of eth0, rather than another different IP address;
After step 612:MAG1 receives registration answer " PBA ", send " DHCPOffer " to MN, filling in LMA therein is the MN addresses distributed;
After step 614:MN receives " DHCP Offer ",, then send " DHCP Request " to MAG1 as agreeing to use this address;
Step 616:MAG1 sends " DHCP ACK " to MN after receiving " DHCP Request "
Step 618:MN breaks off the connection of eth0, continues through eth1 with same home address accesses network or service is provided.
From above-mentioned signaling process, can find out; Can use the DHCP signaling to obtain the identical ip addresses configuration in the present embodiment; Because the Signalling exchange flow process when MN switches is identical with common proxy-mobile IP technology; Therefore can not cause extra delay; And present embodiment has also solved in the prior art defective that method that draft openly do not propose to use DHCP obtains the feasible operation in the address of identical IP, and present embodiment has been made detailed, feasible operating instruction to using the DHCP signaling to obtain the concrete operating process of identical ip addresses configuration.
In above-mentioned each method embodiment, the Address requests that LMA need confirm to receive according to strategy file is from another port of certain node of having registered, but not another different mobile node.Down in the face of the strategy file that stores the corresponding identification information of mobile node and each port thereof in the various embodiments of the present invention and store each port identification information and the record cache of bind address information is illustrated, but do not limit it.
Strategy file (this paper is called for short policy store) has been stored mobile node and its each port corresponding relation.Strategy file can be for being integrated in LMA inside, as a memory module of its inside.Strategy file can also be stored in the newly-increased policy service device of the independence that independently communicates with LMA in the webserver or the network mutually with LMA.
Strategy file can database or mode such as file store.Strategy file is can configured in advance good, and regularly upgrades as required, and table 1 is given an example for of strategy file content.
Table 1 strategy file storage organization form
Store banding cache record among the LMA of prior art, but like " 5.1.Extensions to Binding Cache Entry Data Structure " part of normative reference RFC5213 Proxy Mobile IPv6.Standard RFC5213 Proxy Mobile IPv6 formally becomes standard and open in August, 2008.Record improves the record cache that stores each port identification information and bind address information thereof in the various embodiments of the present invention to the banding cache among the existing LMA; As shown in table 2; Port identification information is specially the MAC Address of mobile node port; And corresponding, thereby can obtain the IP address of the registered port of mobile node according to table 1 look-up table 2 with strategy file.CoA represents the Care-of Address of mobile node in the table 2.The implication of binding is the binding of moving nodes local address and its Care-of Address, and the Care-of Address of different mobile nodes maybe be identical, also maybe be different.
Table 2 record cache structure
Those skilled in the art should understand; Table 2 and table 1 are just given an example to a kind of of record cache and strategy file; Can also adopt other storage mode and the corresponding data structure that gets during concrete the realization; As long as according to interface identifier information (as: interface identifier Interface Identifier), be known as another port of this mobile node through strategy file, but not another different mobile node gets final product.
Be illustrated through the changing method between table 1 and table 2 and 6 pairs of multiple interfaces of mobile node of the present invention of map below.LMA is after receiving a login request message message " PBU "; According to the port identification information of wherein carrying; For example " MN1 ' s Interface2 MAC ", the query strategy file obtains Query Result; Inform that this port of LMA (Interface) corresponding mobile node MN1 has another port identification information, its identifier (Interface Identifier) is " MN1 ' s Interface1 MAC ".LMA can search " MN1 ' s Interface1 MAC " and whether be in binding state from record cache.If; Then obtain the IP address, local that MN1 binds; The home address (Home IP Address) corresponding like " MN1 ' s Interface1 MAC " in the table 2; Be IP1, and it is distributed to the port switching of mobile node specified in " PBU ", promptly " MN1 ' s Interface2 MAC ".
In sum, above-mentioned one or how each method embodiment compared with prior art has following beneficial effect:
1, in the prior art; MAG must be provided with when LMA sends agent binding update and switch the indication territory; MAG judges whether to be provided with three kinds of methods more complicated of switching the indication territory, needs extra particular requirement, and the request that LMA confirms according to strategy file to receive among the changing method embodiment between multiple interfaces of mobile node of the present invention is from another interface of the MN that has registered; Use very simple method to judge the switching that this is an interface more than, distribute original registered interface IP address.
2, in the prior art openly draft do not propose to use the method for DHCP to obtain the defective of the feasible operation in the address of identical IP, present embodiment has been made detailed, feasible operating instruction to using the DHCP signaling to obtain the concrete operating process of identical ip addresses configuration.
3, the scheme that proposes in the prior art just is applicable to the scene of Agent IP v6; And each method embodiment that the present invention proposes follows proxy-mobile IP v4 agreement; And can adopt DHCP signaling in the IPv4 network as insert detecting and address distribution, therefore also applicable to the scene of IPv4 network and Agent IP v4.
4, in the prior art, MAG judges whether to be provided with when switching the indication territory and may add new Signalling exchange, and mutual with original MAG for example with the mutual of aaa server or mutual with MN, thereby causes extra switching delay.Signalling exchange flow process when above-mentioned each method embodiment MN switches can compatible common proxy-mobile IP technology, therefore can not cause extra delay.
5, above-mentioned each method embodiment Mobile Access Gateway employing DHCP signaling and MN are mutual; Reach and move the purpose that inserts detection and address assignment; Mobile management and the irrelevant characteristic of mobile node self in the proxy-mobile IP can have been realized; MN can obviously not increase delay and complexity in the expection of performance of switching and speed, performance can be than the poor performance of other multiport switching yet.
According to the embodiment of the invention, a kind of policy service device also is provided, through Fig. 7-Fig. 8 tactful service unit is illustrated below.
Embodiment four
Fig. 7 is the policy service apparatus structure sketch map according to the embodiment of the invention four.As shown in Figure 7, present embodiment comprises: memory module 2 is used to store the strategy file of the corresponding identification information of mobile node and each port thereof; Update module 4 is used for strategy file is upgraded; Communication module 6 is used to receive the query requests that comprises mobile node access port identifier information, from strategy file, obtains the registered port corresponding identification of mobile node information.
Memory module 2 in the policy service device is responsible for the storage policy file.Communication module 6 is responsible for communicating with LMA, update module 4 and memory module 2.
The policy service device can be integrated in LMA inside; Integrated unit as a storage policy file; Also can be used as and intercom mutually with LMA but a network element in the independent network that is provided with, as: modes such as strategic server exist, and interconnect with LMA and intercommunication mutually.Regardless of the physical location of policy service device, the mode of communicating by letter and all can adopt " socket " to communicate by letter with LMA.
The policy service device of present embodiment is provided with strategy file; Thereby can be so that in the multiple interfaces of mobile node handoff procedure; LMA is through this strategy file of inquiry; The login request message of confirming to receive is from another port of the mobile node of having registered, thereby judges the access of mobile node multiport, and then the port address of the mobile node of registered use is distributed on the access interface of this mobile node.The present embodiment set-up mode is simple, has the identical beneficial effect of method embodiment, identical or similar techniques content is not carried out repeat specification at this.
Embodiment five
Fig. 8 is the policy service apparatus structure sketch map according to the embodiment of the invention five.Fig. 8 and Fig. 7 are similar, but the further refinement of the internal structure of policy service device is as shown in Figure 8, and communication module 6 comprises in the present embodiment: receive submodule 62, be used to receive query requests and the strategy file lastest imformation of LMA; Processing sub 64 is used for the access port identifier information that comprises according to said query requests, and the query strategy file obtains the registered port corresponding identification of mobile node information, and update module 4 is upgraded; Send submodule 66, be used to send the registered port corresponding identification of mobile node information.
Memory module 2 in the present embodiment policy service device is responsible for the storage policy file, and the form of strategy file storage can be database or file mode.Communication module 6 can adopt different communication modes according to the concrete file layout of strategy file with the communication of memory module 2: strategy file adopts database storage, and the processing sub 64 of communication module 6 can adopt query sentence of database communication; Strategy file adopts file storage, and processing sub 64 can adopt flow operation communication.Receive submodule 62 and receive the query requests of LMA or the renewal request of strategy file, communicate with memory module 2 or update module 4 subsequently, the Query Result that obtains is returned to LMA through sending submodule 66.
Embodiment six
The present invention also provides a kind of LMA, and Fig. 9 is the local mobile agent internal structure sketch map according to the embodiment of the invention six, and as shown in Figure 9, the LMA of present embodiment comprises:
Query processing module 3 is used for according to access port identifier information, obtains the registered port corresponding address of mobile node information;
Sending module 5 is used for the registered port corresponding address of mobile node information distribution is sent to mobile node.
Query processing module 3 is according to access port identifier information among the LMA of present embodiment; Obtain the registered port corresponding address of mobile node information; Can be referring to the related description of said method embodiment, as: obtain the home address of corresponding registered port according to strategy file and record cache, thereby make mobile node can use the home address of " forever " mobile in network; Identical beneficial effect with method embodiment does not carry out repeat specification to identical or similar techniques content at this.
Embodiment seven
Figure 10 is the local mobile agent internal structure sketch map according to the embodiment of the invention seven.Shown in figure 10; Present embodiment also comprises: memory module 7; Be used to store the strategy file of mobile node and the corresponding identification information of each port thereof; And can store the record cache of each port identification information and bind address information thereof, specifically can be referring to the related description of strategy file among the embodiment three and record cache.
Query processing module 3 comprises in the present embodiment: inquiry submodule 32; Be used for to memory module 7 query strategy files (if LMA does not have the memory module 7 of storage policy file; Then inquire about submodule 32 and need send query requests, obtain the registered port corresponding identification of said mobile node information to the network element (policy service device etc.) of storage policy file; Processing sub 34 is used for according to the registered port corresponding identification of mobile node information, obtains the registered port corresponding address of mobile node information from record cache.
In sum, each embodiment of said method of the present invention can realize in policy service device that possesses Fig. 7-shown in Figure 10 and LMA.
Embodiment eight
Figure 11 is according to the switched system structural representation between the multiple interfaces of mobile node of the embodiment of the invention eight.
Mobile node MN comprises first port and second port, is used for when the port switching port, sends the access request message that comprises access port identifier information;
The one MAG and the 2nd MAG link to each other with second port with first port respectively, are used for MN is inserted detection, when succeeding in registration, send this login request message;
LMA is used for the access port identifier information according to MN, and the query strategy file obtains the registered port corresponding identification of MN information, obtains registered port corresponding address information; The registered port corresponding address of MN information is distributed to the access interface of MN through a MAG or the 2nd MAG;
The policy service device is positioned at LMA, perhaps is and LMA mutually independently in the server, is used for the storage policy file.
In sum; Various embodiments of the present invention can provide a kind of very simple method to make LMA obtain the handover information between the mobile node different port; And, proxy-mobile IP technology that can be compatible common when switching owing to mobile node, therefore; Can not cause extra delay, can effectively solve to utilize MAG to judge in the prior art and be provided with and switch defectives such as indicating territory complicacy, switching delay.
The present invention can have multiple multi-form embodiment; Be that example combines accompanying drawing that technical scheme of the present invention is illustrated with Fig. 3-Figure 11 above; This does not also mean that the applied instantiation of the present invention can only be confined in the specific flow process or example structure; Those of ordinary skill in the art should understand; The specific embodiments that preceding text provided is some examples in the multiple its preferred usage, anyly is known as one of them port of mobile node through access port identifier information, but not the execution mode of another new mobile node all should be within technical scheme of the present invention scope required for protection.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program 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.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the changing method between a multiple interfaces of mobile node is characterized in that, comprising:
When Mobile Access Gateway detected the port access of mobile node, the local mobile agent corresponding to said mobile node sent the login request message that comprises access port identifier information;
Said local mobile agent receives said login request message, according to said access port identifier information, obtains the registered port corresponding address of said mobile node information;
Said local mobile agent is given the registered port corresponding address of said mobile node information distribution the access interface of said mobile node;
Wherein, said according to said access port identifier information, the operation that obtains the registered port corresponding address of said mobile node information comprises:
Said local mobile agent is according to said access port identifier information, and inquiry stores the strategy file of said mobile node and the corresponding identification information of each port thereof, obtains the registered port corresponding identification of said mobile node information;
Said local mobile agent from storing the record cache of each port identification information and bind address information thereof, obtains the registered port corresponding address of said mobile node information according to the registered port corresponding identification of said mobile node information.
2. method according to claim 1 is characterized in that, said strategy file is database or the file that is integrated in said local mobile agent, and perhaps said strategy file is and said local mobile agent database or the file in the server independently mutually.
3. method according to claim 1 is characterized in that, said strategy file is provided with and regular update in advance.
4. method according to claim 1 is characterized in that, said access port identifier information is the MAC Address of the said port of said mobile node.
5. according to each described method among the claim 1-4; It is characterized in that; When said Mobile Access Gateway detected the port access of mobile node, the operation of sending the login request message that comprises access port identifier information to the corresponding local mobile agent of said mobile node specifically comprised:
Said mobile node carries out Signalling exchange through DHCP signaling and Mobile Access Gateway;
When said Mobile Access Gateway detects the access of said mobile node, send said login request message to said local mobile agent.
6. a policy service device is characterized in that, comprising:
Memory module is used to store the strategy file of the corresponding identification information of mobile node and each port thereof;
Update module is used for said strategy file is upgraded;
Communication module is used to receive the query requests that comprises mobile node access port identifier information, from said strategy file, obtains the registered port corresponding identification of said mobile node information.
7. policy service device according to claim 6 is characterized in that, said communication module comprises:
Receive submodule, be used to receive said query requests and strategy file lastest imformation;
Processing sub is used for the access port identifier information that comprises according to said query requests, inquires about said strategy file, obtains the registered port corresponding identification of said mobile node information, and said update module is upgraded;
Send submodule, be used to send the registered port corresponding identification of said mobile node information.
8. according to claim 6 or 7 described policy service devices, it is characterized in that said strategy file is with database or file mode storage; Said communication module is inquired about through query sentence of database or flow operation query statement.
9. a local mobile agent is characterized in that, comprising:
Receiver module is used to receive the login request message that mobile node comprises access port identifier information;
Query processing module is used for according to said access port identifier information, obtains the registered port corresponding address of said mobile node information;
Sending module is used for the registered port corresponding address of said mobile node information distribution is sent to said mobile node;
Wherein, said query processing module comprises:
The inquiry submodule is used to inquire about the strategy file that stores said mobile node and the corresponding identification information of each port thereof, obtains the registered port corresponding identification of said mobile node information;
Processing sub is used for according to the registered port corresponding identification of said mobile node information, from storing the record cache of each port identification information and bind address information thereof, obtains the registered port corresponding address of said mobile node information.
10. local mobile agent according to claim 9 is characterized in that, also comprises:
Memory module is used to store the strategy file of the corresponding identification information of mobile node and each port thereof.
11. switched system between a multiple interfaces of mobile node is characterized in that, comprising:
Mobile node comprises a plurality of ports, when being used to carry out the port switching port, sends the access request message that comprises access port identifier information;
Mobile Access Gateway is used for said mobile node is inserted detection, sends the login request message that comprises said access port identifier information;
Local mobile agent; Be used for according to said access port identifier information; Inquiry stores the strategy file of said mobile node and the corresponding identification information of each port thereof; Obtain the registered port corresponding identification of said mobile node information, according to the registered port corresponding identification of said mobile node information, from storing the record cache of each port identification information and bind address information thereof; Obtain the registered port corresponding address of said mobile node information, the registered port corresponding address of said mobile node information distribution is given the access interface of said mobile node;
The policy service device is positioned at said local mobile agent, perhaps is and said local mobile agent server independently mutually, is used to store the corresponding identification information of mobile node and each port thereof.
12. system according to claim 11 is characterized in that, said policy service device comprises:
Memory module is used to store the strategy file of the corresponding identification information of mobile node and each port thereof;
Update module is used for said strategy file is upgraded;
Communication module is used to receive the query requests that comprises mobile node access port identifier information, from said strategy file, obtains the registered port corresponding identification of said mobile node information.
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| US8996657B2 (en) * | 2010-09-01 | 2015-03-31 | Canon Kabushiki Kaisha | Systems and methods for multiplexing network channels |
| CN102448075A (en) * | 2010-09-30 | 2012-05-09 | 上海贝尔股份有限公司 | Method and system for mobility management of sensor network node |
| CN102802167B (en) * | 2011-05-25 | 2017-04-05 | 中兴通讯股份有限公司 | A kind of method and system for obtaining communication link quality of terminal |
| CN102984687A (en) * | 2011-09-06 | 2013-03-20 | 中兴通讯股份有限公司 | Mobile management method and system thereof |
| CN103096343B (en) * | 2011-11-01 | 2018-02-16 | 中兴通讯股份有限公司 | One kind flows policy management method on the move and system |
| CN103096394B (en) * | 2011-11-01 | 2017-10-17 | 中兴通讯股份有限公司 | One kind stream policy management method on the move and system |
| CN103458389B (en) | 2012-05-29 | 2018-10-26 | 南京中兴软件有限责任公司 | Mobile node registration method, interoperability methods, switching method and network element |
| CN103581346B (en) * | 2012-07-19 | 2019-06-18 | 中兴通讯股份有限公司 | File transmitting method, system and local mobile anchor |
| RU2669582C2 (en) * | 2014-05-30 | 2018-10-12 | Хуавэй Текнолоджиз Ко., Лтд. | Method and device for changing the service path |
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