CN101854664A - Method for optimizing data forwarding in nested mobile network - Google Patents
Method for optimizing data forwarding in nested mobile network Download PDFInfo
- Publication number
- CN101854664A CN101854664A CN201010203074A CN201010203074A CN101854664A CN 101854664 A CN101854664 A CN 101854664A CN 201010203074 A CN201010203074 A CN 201010203074A CN 201010203074 A CN201010203074 A CN 201010203074A CN 101854664 A CN101854664 A CN 101854664A
- Authority
- CN
- China
- Prior art keywords
- address
- mobile router
- mobile
- nested
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for optimizing data forwarding in a nested mobile network. In the method, a nested mobile network address conversion table is introduced and comprises the three fields of a destination mobile router home address, a next-level mobile router address and a life cycle. As the mobile routers of each level establish the nested mobile network address conversion table layer by layer and execute the address replacement and forwarding of data packets layer by layer, the upper-level mobile routers can relatively better solve the problem of the frequent tunnel encapsulation and de-encapsulation of the nested mobile network in the data forwarding without knowing network topological information maintained by the next-level mobile routers thereof to further optimize the way of forwarding the data packets in the nested mobile network and simultaneously protect the privacy of the internal topological information of lower-level nested mobile networks. Moreover, the defect that stub networks discard the data packets of the lower-level mobile networks is overcome. The method has the advantages of simple operation steps, easy implementation and vast popularization and application prospect.
Description
Technical field
The present invention relates to a kind of in nested mobile network the optimization method of data forwarding, belong to the technical field of mobile Internet.
Background technology
Network mobility is meant one group of set of the fixing or mobile node of networking mutually, moves as a metastable integral body, and inserts the Internet and obtain information and professional mode.Generally, all these nodes connect and compose a mobile network by router, and it is to be accompanied by the process that router constantly changes Network Access Point that mobile network's integral body moves.The NEMO of the IETF of International Standards Organization (NetworkMobility) working group is on the mobile IPv 6 protocol basis, by the function choosing-item of introducing mobile router MR (MobileRouter), increase mobile router, the content of expanding binding update messages and router advertisement message, and function such as hand-off process flow process, the standard of network enabled mobile management: RFC3963-NEMOv6 (the basic supported protocol of mobile network) has been proposed.
Node M NN (Mobile Network Node) in Correspondent Node CN of mobile network outside (Correspondent Node) and mobile network is when communicating, the process that its packet is transmitted is: therefore CN-HA-MR-MNN exists the problem of " triangle route ".When not having nested mobile network, can use the scheme that solves " triangle route " in the similar mobile IPv 6 protocol that it is handled.But, when having nested mobile network, still can there be the problem of similar " triangle route " in the mobile network who is in low layer, packets need encapsulates and decapsulation by multiple tunnel, the propagation delay time of packet is increased greatly, and its complexity is far longer than " triangle route " problem in the mobile IPv 6 protocol.
Referring to Fig. 1, the path (as shown in phantom in FIG.) when introducing node M N among Correspondent Node and the nested mobile network MNP3 (Mobile Network prefix 3) and communicating: CN-HA3-HA2-HA1-MR1-MR2-MR3-MN.Wherein the home agent of NEMOv6 (Home Agent) HA1, HA2 and HA3 are respectively the home agent of NEMOv6 mobile router MR1, MR2 and MR3.In the packet repeating process, HA3, HA2 and HA1 encapsulate packet successively, then, again by MR1, MR2 and MR3 successively to its decapsulation.Otherwise, when the node from nested mobile network MNP3 sends packet to Correspondent Node, then transmit by the rightabout in above-mentioned path, by mobile router packet is encapsulated, home agent then carries out decapsulation to packet.
At present, prior art solves the encapsulation problem in multiple tunnel by routing optimization manner, and its basic thought is by setting up data forwarding tunnel between top layer mobile router and low layer mobile network's home agent, reducing the tunnel encapsulation number of plies of packet.But, routing optimization manner may cause low layer mobile network's internal network topology information to be exposed, and, when middle mobile router refusal when to transmit destination address or source address be not address among its mobile network of living in, cause terminal network (stub network) to abandon the defective of low layer packet quilt probably.
For example, Chinese patent application " a kind of implementation method of mobile network's route and network " (application number: 200810104453.3) propose a kind of routing optimization method that solves nested mobile network, need lower floor's mobile router to the upper strata mobile router send the own mobile network who safeguards with and the mobile network's of lower floor's mobile router maintenance network topology message, with the mobile network of the lower floor part as the upper strata mobile network, this method has been destroyed the privacy of mobile network's topological structure.
The notion of root mobile router TLMR (Top Layer Mobile Router) is introduced in this patent application, all mobile routers form a tree structure (Tree Struct), each mobile router is as the node of tree, the mobile router in the tree (except in the tree as the mobile router of leaf node) need know the network topological information that its all descendants's mobile routers are safeguarded.Higher level's mobile router MR receives the network topological information of the MR of subordinate transmission and is recorded among the higher level MR, and these network topological informations comprise the information such as home address HoA, Care-of Address CoA, home agent HA and mobile network's prefix MNP of the MR of subordinate and connected all MR of subordinate.Therefore, TLMR knows the topological structure of whole nested networks, simultaneously MR has also preserved the Care-of Address TLMR_CoA of TLMR, and MR is to own HA transmission binding message, and this binding message comprises the home address MR_HoA of Care-of Address MR_CoA, MR of MR and the Care-of Address of TLMR.When the home agent of MR is received these packets, in buffer memory, preserve these binding informations.After finishing binding, on behalf of MR and MR_HA, TLMR set up tunnel (referring to shown in Figure 1).MR1 (being above-mentioned mobile router TLMR) has preserved the mobile network's that MR2 and MR3 safeguard network topological information (comprising home address MR2HoA, Care-of Address MR2_CoA, the hometown-agent-address HA2 of MR2, home address MR3_HoA, Care-of Address MR3_CoA, hometown-agent-address HA3 and the mobile network's prefix MNP3 of mobile network's prefix MNP2, MR3).Also preserved the mobile network's of MR3 maintenance network topological information simultaneously among the MR2.When MR3 sends binding update messages to home agent HA 3, the Care-of Address of root mobile router MR1, the Care-of Address MR3_CoA of oneself and home address MR3_HoA in this message, have been comprised.After HA3 receives this binding update messages, in buffer memory, preserve these binding informations.After finishing binding, MR1 replaces MR3 and MR3_HA to set up the tunnel.The binding procedure of MR2 and tunnel establishment procedure are all identical with MR3.
When the node M N of CN in the mobile network MNP3 that MR3 safeguards sends packet, the forward-path of this packet is shown in the solid line among Fig. 1: CN → HA3 → MR1 → MR2 → MR3, this packet mails to HA3 earlier, encapsulate by HA3 that (destination address is MR1_CoA, source address is HA3) after, be transmitted to MR1 by the tunnel, after MR1 receives packet, according to the network topological information of preserving, the destination address that skin is encapsulated changes MR3_CoA into.Middle mobile router MR2 does not handle packet and directly is transmitted to MR3, and decapsulation is transmitted to MN to packet by MR3.When the node M N among the mobile network MNP3 when CN sends packet, the packet forward-path is opposite with above-mentioned path, by MR3 packet is encapsulated that (source address is MR3_CoA, destination address is HA3), and be transmitted to MR2, MR2 does not carry out any processing and directly is transmitted to MR1 packet, MR1 changes the source address of the outer encapsulation of packet into the Care-of Address MR1_CoA of self, and packet is transmitted to HA3, HA3 is transmitted to CN after packet is carried out decapsulation.
There are following two defectives in above-mentioned prior art: at first, prior art is with the part (referring to shown in Figure 1) of the mobile network of subordinate as the higher level mobile network, each mobile network of subordinate will inform its network topological information higher level's mobile router, causes mobile network's inner topology information to be exposed.Moreover the middle mobile router of prior art is not made amendment to packet; But, if the mobile network of middle certain one deck during as terminal network, may cause mailing to or be dropped from low layer mobile network's packet.Therefore, how to solve above-mentioned two defectives that prior art exists, just become the focus of scientific and technical personnel's concern in the industry.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of in nested mobile network the optimization method of data forwarding, this method has proposed the notion and the structure of nested mobile network ATT, and rely on this nested mobile network ATT and carry out that replace the address and the forwarding of packet, the inner topology information that has solved the mobile network preferably is exposed and terminal network abandons the problem of low layer mobile network data bag.
In order to reach the foregoing invention purpose, the invention provides a kind of in nested mobile network the optimization method of data forwarding, it is characterized in that: introduce the nested mobile network ATT, this table comprises following three fields: purpose mobile router home address, next stage mobile router address and time life cycle; Address replacement and forwarding that mobile routers at different levels are successively set up the nested mobile network ATT and successively carried out packet, solve repeatedly tunnel encapsulation and decapsulation and the mobile network inner topology information problem that be exposed of nested mobile network in data forwarding, and solved the defective that terminal network abandons low layer mobile network data bag; Described method comprises following operating procedure:
When (A) mobile router newly inserts nested mobile network, receive the advertising of route message that the upper level mobile router sends, if that this route announcement message shows access is the mobile network, after the then new mobile router that inserts is own co-located care-of address, execution in step (B); Otherwise, send binding update messages to its home agent, its current Care-of Address and home address are bound, upgrade positional information, finish this flow process;
(B) set up the nested mobile network ATT: the new mobile router application that inserts adds this nested mobile network, and middle mobile routers at different levels and root mobile router are respectively it and set up the nested mobile network ATT;
(C) the home agent binding of new access mobile router is upgraded: the new mobile router that inserts sends " binding update messages " to its home agent, upgrades positional information;
(D) the nested mobile network ATT of renewal mobile routers at different levels: at different levels middle mobile router and root mobile router in the nested mobile network upgrade self nested mobile network ATT respectively;
(E) node in the nested mobile network is realized communicating by letter with correspondent node.
The present invention is a kind of optimization method of nested mobile network internal data pass-through mode, this method is the address replacement and forwarding of successively setting up the nested mobile network ATT and successively carrying out packet, working mechanism to mobile router makes amendment, make higher level's mobile router need not the network topological information of knowing that its next stage mobile router is safeguarded, the repeatedly tunnel encapsulation that nested mobile network exists and the problem of decapsulation just can have been solved preferably in data forwarding, thereby optimized the pass-through mode of packet in nested mobile network, also protected low layer mobile network's inner topology information simultaneously; In addition, in the process of successively replacing and transmitting, solved the problem that terminal network abandons low layer mobile network data bag to the data packet address.Operating procedure of the present invention is simple, realizes having good popularization and application prospect easily.
Description of drawings
Fig. 1 is the application scenarios schematic diagram of the nested mobile network route implementing method of prior art.
Fig. 2 is the optimization method operating procedure flow chart of data forwarding in the nested mobile network of the present invention.
Fig. 3 is the data packet transmission path schematic diagram in the nested mobile network routing optimization method of the present invention.
Fig. 4 is a nested mobile network ATT structural representation of the present invention.
Fig. 5 is the field and the key diagram of home address notice message of the present invention and updating message thereof.
Fig. 6 is home address announcement acknowledge message of the present invention and upgrades acknowledge message field and key diagram.
Fig. 7 is that the mobile router in the inventive method adds the flow process sequential chart.
Fig. 8 is the data packet transmission Times leading address replacement process schematic diagram in the inventive method.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and Examples.
As everyone knows, when first mobile network MNET1 (Mobile Network1) inserts the Internet by a nonlocal couple in router, when second mobile network MNET2 and the 3rd mobile network MNET3 insert the Internet by MNET1 and MNET2 respectively, three layers of nested mobile network have just been formed.Wherein, each mobile network's corresponding mobile router MR can set up two-way forwarding tunnel with the home agent HA of oneself.At this moment, when being in node LFN3 among the MNET3 and communicating by letter, carry out triple tunnel encapsulation, cause repeatedly encapsulation and decapsulation in the data forwarding process to be handled, produce data transfer delay data with communication node CN.
Though prior art has solved the multiple tunnel problem in the nested mobile network, can reduce the propagation delay time of data packet length and reduction packet.But its routing optimality is in the low layer mobile router Care-of Address of top layer mobile router and the home address of self to be bound, and sets up that low layer mobile network's home agent and the data forwarding tunnel between the top layer mobile router realize.When the node of Correspondent Node in the low layer mobile network sent packet, this packet was forwarded to low layer mobile network's home agent earlier, after the encapsulation, directly is forwarded to the top layer mobile router.Like this, only need be through can realize the routing optimality of packet once heavy tunnel.But there are following two problems in the prior art of this routing optimality: at first, the low layer mobile network must announce the internal network topology information to high-rise mobile network, has destroyed low layer mobile network's privacy.Moreover terminal network causes low layer mobile network's packet to be dropped.Because of terminal network is the edge network of the Internet.The gateway of terminal network abandons source address for the security consideration meeting and does not belong to the outflow packet of this network and the inflow packet that destination address does not belong to this end network.
The present invention is the optimization method of data forwarding in a kind of nested mobile network, this method is introduced the nested mobile network ATT, this table comprises following tactic three fields: purpose mobile router home address, next stage mobile router address and time life cycle (referring to Fig. 4), address replacement and forwarding that mobile routers at different levels are successively set up the nested mobile network ATT and successively carried out packet, thereby change the original working mechanism of mobile router, make nested mobile network in data forwarding, no longer carry out repeatedly the operation of tunnel encapsulation and decapsulation.Subordinate's mobile router only needs the home address HoA to upper level mobile router announcement self and subordinate's mobile router thereof, and the upper level mobile router is after receiving these HoA information, and the Care-of Address of subordinate's mobile router that these home address and its are directly linked to each other is bound.Like this, the upper level mobile router just can not obtain the mobile network's of subordinate inner topology information, has protected mobile network's topology information privacy.Simultaneously, by adopting the address replacement policy to solve the defective that terminal network abandons low layer mobile network data bag.
Referring to Fig. 2 and other each accompanying drawings, introduce the concrete operations step of the inventive method:
When steps A, mobile router newly insert nested mobile network, receive the advertising of route message that the upper level mobile router sends, if that this route announcement message shows access is the mobile network, after the then new mobile router that inserts is own co-located care-of address, execution in step B; Otherwise, send binding update messages to its home agent, its current Care-of Address and home address are bound, upgrade positional information, finish this flow process.
Step B, set up the nested mobile network ATT: the new mobile router application that inserts adds this nested mobile network, at different levels in the middle of mobile routers and root mobile router be respectively it and set up the nested mobile network ATT.
This step B comprises following concrete operations content:
(B1) newly insert mobile router and send " home address notice message " (referring to shown in Figure 5) to its upper level mobile router, care-of address field in this message (MR_CoA) comprises the Care-of Address of this new access mobile router, and home address field (MR_HoA) comprises the home address of the mobile router that has write down in the home address of this new access mobile router and the nested mobile network ATT thereof.
(B2) after this upper level mobile router receives " the home address notice message " of new access mobile router transmission, the home address of all mobile routers in the home address field in this message and the Care-of Address in the care-of address field are bound, and be stored in the nested mobile network ATT of oneself; Then, after the address that this upper level mobile router will be somebody's turn to do the care-of address field in " home address notice message " replaces with the Care-of Address of self, transmit new " home address notice message " to its upper level mobile router.
(B3) after mobile router was received " home address notice message " in the middle of all, all operations of execution in step (B2) received " home address notice message " until the root mobile router.Among the present invention, the root mobile router is to be positioned at the nested mobile network top layer, directly to insert the Internet, obtain the outlet mobile router of service, middle mobile router is new all mobile routers that insert between mobile router and the root mobile router in the nested mobile network.
(B4) after the root mobile router receives " home address notice message ", home address in the home address field in the message and the Care-of Address in the care-of address field are bound, and be recorded in the nested mobile network ATT of oneself.
(B5) the root mobile router returns " home address announcement acknowledge message " (referring to shown in Figure 6) to the next stage mobile router to its transmission " home address notice message " originally, and this message comprises the Care-of Address of root mobile router.
(B6) after mobile router receives " home address announcement acknowledge message " in the middle of, the Care-of Address of record root mobile router returns this " home address announcement acknowledge message " to the next stage mobile router to its transmission " home address notice message " originally simultaneously.
(B7) after mobile router is received " home address announcement acknowledge message " in the middle of all, all operations of execution in step (B6), after the mobile router of new access receives this " home address announcement acknowledge message ", preserve the Care-of Address of the root mobile router in this message.
(B8) the new mobile router that inserts judges whether it connects the next stage mobile router, if, then newly insert mobile router and continue to be somebody's turn to do " home address announcement acknowledge message " to the forwarding of next stage mobile router, the next stage mobile router then continues the operation of execution in step (B7); Otherwise, stop forwarding the flow process of end step B.
Step C, binding is upgraded to the home agent of new access mobile router: the new mobile router that inserts sends " binding update messages " to its home agent, upgrades positional information.
Step C comprises following concrete operations content:
(C1) newly insert mobile router and send " binding update messages ", current Care-of Address and home address are bound, upgrade positional information to its home agent; And nested networks sign position and home address option are set respectively in this " binding update messages ", what the former identified its current access is nested networks; Address among the latter is the home address of this new access mobile router.
(C2) after the upper level mobile router receives this " binding update messages ", the source address in the message is replaced with oneself Care-of Address, transmit " binding update messages " to its upper level mobile router then.
(C3) after mobile router was received " binding update messages " in the middle of all, all the operation of execution in step (C2) received " binding update messages " until the root mobile router.
(C4) after the root mobile router receives " binding update messages ", the source address in the message is replaced with oneself Care-of Address, send it to the home agent of new access mobile router then.
(C5) after the home agent that newly inserts mobile router receives " binding update messages " from the root mobile router, bind newly inserting the home address of mobile router and the Care-of Address of root mobile router, and return " binding acknowledgement message ", declare to be finished to new access mobile router and newly insert the address binding of mobile router; Comprise second a class route field in this binding acknowledgement message, the address in this field is the home address of this new access mobile router.
(C6) after the root mobile router receives " binding acknowledgement message ",, in the nested mobile network ATT, inquire earlier this address pairing " next stage mobile router address " according to the address in the second class route field wherein; Again with the destination address that is somebody's turn to do in " the next stage mobile router address " replacement " binding acknowledgement message "; Then, be somebody's turn to do " binding acknowledgement message " to the next stage mobile router forwarding of correspondence; Simultaneously, the root mobile router is set up the tunnel with the new home agent that inserts mobile router.
(C7) after mobile router receives " binding acknowledgement message " in the middle of, check that whether the address that second class in the message moves in the route field is complementary with self home address; If coupling shows that this mobile router is exactly the recipient of this " binding acknowledgement message ", the flow process of end step (C); Otherwise middle mobile router inquires pairing next stage mobile router address, this address according to the address in the second class route field wherein in the nested mobile network ATT; Again with the destination address in this next stage mobile router address replacement " binding acknowledgement message "; And to next stage mobile router forwarding this " binding acknowledgement message ".
(C8) after all subordinate's mobile routers were received " binding acknowledgement message ", all operations of execution in step (C7) were until the flow process of end step (C).
Fig. 7 is in above-mentioned three steps of the present invention, the associative operation sequential of each network element in the nested networks.
The nested mobile network ATT of step D, renewal mobile routers at different levels: the nested mobile network ATT that at different levels middle mobile router in the nested mobile network and root mobile router upgrade self respectively.
Time life cycle in the nested mobile network ATT of the present invention (referring to Fig. 4) in the corresponding clauses and subclauses of certain mobile router is 0 o'clock, show that this moment, this mobile router left this nested mobile network, should delete this mobile router pairing clauses and subclauses in the nested mobile network ATT; Therefore, each mobile router in the nested mobile network all will periodically send " home address updating message " to its upper level mobile router, keeps the life span of oneself.
Step D comprises following concrete operations content:
(D1) mobile router finds that time life cycle of oneself soon is at 0 o'clock, sends " home address updating message " (referring to shown in Figure 5) to the upper level mobile router; This message structure is identical with " home address notice message ", and wherein care-of address field (MR_CoA) comprises the Care-of Address of this mobile router, and home address field (MR_HoA) comprises the home address of this mobile router.
(D2) after this upper level mobile router receives this " home address updating message ", after revising the life span of the corresponding clauses and subclauses of this mobile router in the nested mobile network ATT, address in the care-of address field is wherein replaced with self Care-of Address, and transmitting to its upper level mobile router should " home address updating message " again.
(D3) after mobile router was received " home address updating message " in the middle of all, all operations of execution in step D2 received this " home address updating message " until the root mobile router.
(D4) after the root mobile router receives this " home address updating message ", after revising the life span of the corresponding clauses and subclauses of this mobile router in the nested mobile network ATT, to the next stage mobile router transmission " home address renewal acknowledge message " (referring to shown in Figure 6) of its transmission " home address updating message ", comprised the Care-of Address of root mobile router to originally in this message;
(D5) after this next stage mobile router receives " home address renewal acknowledge message ", the Care-of Address of record root mobile router; Simultaneously, this message is sent to originally middle mobile router to its transmission " home address updating message ".
(D6) after mobile router was received " home address renewal acknowledge message " in the middle of all, all operations of execution in step D5 received that until the mobile router of initiating this renewal nested mobile network ATT this home address upgrades acknowledge message.
(D7) after the mobile router of initiating this renewal nested mobile network ATT is received the home address updating message, preserve the Care-of Address of root mobile router, the flow process of end step (D).
Node in step e, the nested mobile network is realized communicating by letter with correspondent node.Node in the nested mobile network of the present invention realizes having when communicating by letter following two kinds of scenes with correspondent node:
Referring to Fig. 8 (A), introduce first kind of scene: the mobile node MN in transmitting uplink data-nested mobile network sends data to Correspondent Node CN; Among this communication scenes E1, further comprise following content of operation:
(E11) MN sends packet, and wherein source address is the address of MN, and destination address is the address of CN.
(E12) after MN place mobile network's mobile router receives this packet, it is encapsulated, source address wherein is the Care-of Address of this mobile router, and destination address is the address of its home agent; Simultaneously, mobile router increases the home address option that its numerical value is this mobile router home address in this data packet head; Then, mobile router is transmitted this packet to its upper level mobile router.
(E13) after this upper level mobile router is received this packet, check in the packet whether comprise the home address option,, then this source data packet address is replaced with the Care-of Address of oneself, transmit packet to its upper level mobile router again if comprise; Otherwise, show that this packet is that certain mobile node sends among this mobile network, just handles this packet according to step (E12) method.
(E14) after mobile router received this packet in the middle of all, all the operation of execution in step (E13) received this packet until the root mobile router.
(E15) after the root mobile router receives this packet, source address is wherein replaced with oneself Care-of Address, this packet is sent to the home agent of MN place mobile network's mobile router by the tunnel;
(E16) after the home agent of MN place mobile network's mobile router is received this packet, packet carried out decapsulation after, again this packet is transmitted to Correspondent Node CN, the communication process of end step E.
Referring to Fig. 8 (B), introduce second kind of scene: the mobile node of downlink data transmission-Correspondent Node in nested mobile network sends data.Among this communication scenes E2, further comprise following content of operation:
(E21) CN sends packet, and wherein source address is the address of CN, and destination address is the address of mobile node MN; After this packet is forwarded to MN place mobile network's home agent according to conventional route, home agent encapsulates this packet, wherein source address is a hometown-agent-address, and destination address is the Care-of Address of root mobile router of the nested mobile network at this mobile network place; This packet also comprises second a class route field, and address wherein is the home address of MN place mobile network's mobile router; Then, this packet is forwarded to the root mobile router of nested mobile network.
(E22) after mobile router receives this packet, check earlier whether the address that second class wherein moves in the route field is identical with the home address of this mobile router, if identical, then carries out subsequent step (E23); Otherwise, redirect execution in step (E24).
(E23) address of moving in the route field because of second class in the packet is identical with the home address of this mobile router, shows that this mobile router is exactly purpose mobile node place mobile network's a mobile router; This mobile router carries out decapsulation to packet, and transmits in this mobile network; The purpose mobile node receives this packet, the communication process of end step E;
(E24) this mobile router is according to the address in the second class route field in the packet, elder generation inquires this address pairing " next stage mobile router address " in the nested mobile network ATT after; Again with should " next stage mobile router address " replacing the destination address in this packet; Then, transmit this packet to the next stage mobile router of correspondence; After this next stage mobile router receives this packet, the operation of execution in step (E22).
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (9)
1. the optimization method of a data forwarding in nested mobile network, it is characterized in that: introduce the nested mobile network ATT, this table comprises following three fields: purpose mobile router home address, next stage mobile router address and time life cycle; Address replacement and forwarding that mobile routers at different levels are successively set up the nested mobile network ATT and successively carried out packet, solve the problem that repeatedly tunnel encapsulation that nested mobile network exists and decapsulation and mobile network's inner topology information are exposed in data forwarding, and solved the defective that terminal network abandons low layer mobile network data bag; Described method comprises following operating procedure:
When (A) mobile router newly inserts nested mobile network, receive the advertising of route message that the upper level mobile router sends, if that this route announcement message shows access is the mobile network, after the then new mobile router that inserts is own co-located care-of address, execution in step (B); Otherwise, send binding update messages to its home agent, its current Care-of Address and home address are bound, upgrade positional information, finish this flow process;
(B) set up the nested mobile network ATT: the new mobile router application that inserts adds this nested mobile network, and middle mobile routers at different levels and root mobile router are respectively it and set up the nested mobile network ATT;
(C) the home agent binding of new access mobile router is upgraded: the new mobile router that inserts sends " binding update messages " to its home agent, upgrades positional information;
(D) the nested mobile network ATT of renewal mobile routers at different levels: the nested mobile network ATT that at different levels middle mobile router in the nested mobile network and root mobile router upgrade self respectively;
(E) node in the nested mobile network is realized communicating by letter with correspondent node.
2. method according to claim 1 is characterized in that: described mobile router is can directly insert the Internet in the nested mobile network, obtains the outlet mobile router of service; Mobile router is new all mobile routers that insert between mobile router and the root mobile router in the nested mobile network in the middle of described.
3. method according to claim 1 is characterized in that, described step (B) further comprises following content of operation:
(B1) newly insert mobile router and send " home address notice message " to its upper level mobile router, care-of address field in this message (MR_CoA) comprises the Care-of Address of this new access mobile router, and home address field (MR_HoA) comprises the home address of the mobile router that has write down in the home address of this new access mobile router and the nested mobile network ATT thereof;
(B2) after this upper level mobile router receives " the home address notice message " of new access mobile router transmission, the home address of all mobile routers in the home address field in this message and the Care-of Address in the care-of address field are bound, and be stored in the nested mobile network ATT of oneself; Then, after the address that this upper level mobile router will be somebody's turn to do the care-of address field in " home address notice message " replaces with the Care-of Address of self, transmit new " home address notice message " to its upper level mobile router;
(B3) after mobile router was received " home address notice message " in the middle of all, all operations of execution in step (B2) received " home address notice message " until the root mobile router;
(B4) after the root mobile router receives " home address notice message ", home address in the home address field in the message and the Care-of Address in the care-of address field are bound, and be recorded in the nested mobile network ATT of oneself;
(B5) the root mobile router returns " home address announcement acknowledge message " to the next stage mobile router to its transmission " home address notice message " originally, and this message comprises the Care-of Address of root mobile router;
(B6) after mobile router receives " home address announcement acknowledge message " in the middle of, the Care-of Address of record root mobile router returns this " home address announcement acknowledge message " to the next stage mobile router to its transmission " home address notice message " originally simultaneously;
(B7) after mobile router is received " home address announcement acknowledge message " in the middle of all, all operations of execution in step (B6), after the mobile router of new access receives this " home address announcement acknowledge message ", preserve the Care-of Address of the root mobile router in this message;
(B8) the new mobile router that inserts judges whether it connects the next stage mobile router, if, then newly insert mobile router and continue to be somebody's turn to do " home address announcement acknowledge message " to the forwarding of next stage mobile router, the next stage mobile router then continues the operation of execution in step (B7); Otherwise, stop forwarding the flow process of end step (B).
4. method according to claim 1 is characterized in that, described step (C) further comprises following content of operation:
(C1) newly insert mobile router and send " binding update messages ", upgrade positional information to its home agent; And nested networks sign position and home address option are set respectively in this " binding update messages ", what the former identified its current access is nested networks; Address among the latter is the home address of this new access mobile router;
(C2) after the upper level mobile router receives this " binding update messages ", source address is wherein replaced with oneself Care-of Address, transmit " binding update messages " to its upper level mobile router then;
(C3) after mobile router was received " binding update messages " in the middle of all, all the operation of execution in step (C2) received " binding update messages " until the root mobile router;
(C4) after the root mobile router receives " binding update messages ", the source address in the message is replaced with oneself Care-of Address, send it to the home agent of new access mobile router then;
(C5) after the home agent that newly inserts mobile router receives " binding update messages " from the root mobile router, bind newly inserting the home address of mobile router and the Care-of Address of root mobile router, and returning " binding acknowledgement message ", the new address binding that inserts mobile router declares to be finished; Comprise second a class route field in this binding acknowledgement message, the address in this field is the home address of this new access mobile router;
(C6) after the root mobile router receives " binding acknowledgement message ",, in the nested mobile network ATT, inquire earlier this address pairing " next stage mobile router address " according to the address in the second class route field wherein; Again with the destination address that is somebody's turn to do in " the next stage mobile router address " replacement " binding acknowledgement message "; Then, be somebody's turn to do " binding acknowledgement message " to the next stage mobile router forwarding of correspondence; Simultaneously, the root mobile router is set up the tunnel with the new home agent that inserts mobile router;
(C7) after mobile router receives " binding acknowledgement message " in the middle of, check that whether the address that second class wherein moves in the route field is complementary with self home address; If coupling shows that this mobile router is exactly the recipient of this " binding acknowledgement message ", the flow process of end step (C); Otherwise middle mobile router inquires pairing next stage mobile router address, this address according to the address in the second class route field wherein in the nested mobile network ATT; Again with the destination address in this next stage mobile router address replacement " binding acknowledgement message "; And to next stage mobile router forwarding this " binding acknowledgement message ";
(C8) after all subordinate's mobile routers were received " binding acknowledgement message ", all operations of execution in step (C7) were until the flow process of end step (C).
5. method according to claim 1, it is characterized in that: time life cycle in the described nested mobile network ATT in the corresponding clauses and subclauses of certain mobile router is 0 o'clock, show that this moment, this mobile router left this nested mobile network, should delete this mobile router pairing clauses and subclauses in the nested mobile network ATT; Therefore, each mobile router in the nested mobile network all will periodically send " home address updating message " to its upper level mobile router, keeps the life span of oneself.
6. method according to claim 1 or 5, it is characterized in that: described step (D) further comprises following content of operation:
(D1) mobile router finds that time life cycle of oneself soon is at 0 o'clock, sends " home address updating message " to the upper level mobile router; This message structure is identical with " home address notice message ", and wherein care-of address field (MR_CoA) comprises the Care-of Address of this mobile router, and home address field (MR_HoA) comprises the home address of this mobile router;
(D2) after this upper level mobile router receives this " home address updating message ", after revising the life span of the corresponding clauses and subclauses of this mobile router in the nested mobile network ATT, address in the care-of address field is wherein replaced with self Care-of Address, and transmitting to its upper level mobile router should " home address updating message " again;
(D3) after mobile router was received " home address updating message " in the middle of all, all operations of execution in step (D2) received this " home address updating message " until the root mobile router;
(D4) after the root mobile router receives this " home address updating message ", after revising the life span of the corresponding clauses and subclauses of this mobile router in the nested mobile network ATT, to the next stage mobile router transmission " home address renewal acknowledge message " of its transmission " home address updating message ", comprised the Care-of Address of root mobile router to originally in this message;
(D5) after this next stage mobile router received " home address renewal acknowledge message ", the Care-of Address of record root mobile router simultaneously, sent to originally middle mobile router to its transmission " home address updating message " with this message;
(D6) after mobile router was received " home address renewal acknowledge message " in the middle of all, all operations of execution in step (D5) received that until the mobile router of initiating this renewal nested mobile network ATT this home address upgrades acknowledge message;
(D7) after the mobile router of initiating this renewal nested mobile network ATT is received the home address updating message, preserve the Care-of Address of root mobile router, the flow process of end step (D).
7. method according to claim 1 is characterized in that, the scene that node in described step (E) nested mobile network and correspondent node communicate comprises following two kinds:
(E1) transmitting uplink data: the mobile node MN in the nested mobile network sends data to Correspondent Node CN;
(E2) downlink data transmission: the mobile node of Correspondent Node in nested mobile network sends data.
8. method according to claim 7 is characterized in that: in the described communication scenes (E1), further comprise following content of operation:
(E11) mobile node MN sends packet, and source address wherein is the address of MN, and destination address is the address of Correspondent Node CN;
(E12) after MN place mobile network's mobile router receives this packet, it is encapsulated, source address wherein is the Care-of Address of this mobile router, and destination address is the address of its home agent; Simultaneously, mobile router increases the home address option that its numerical value is this mobile router home address in this data packet head; Then, mobile router is transmitted this packet to its upper level mobile router;
(E13) after this upper level mobile router is received this packet, check in the packet whether comprise the home address option,, then this source data packet address is replaced with the Care-of Address of oneself, transmit packet to its upper level mobile router again if comprise; Otherwise, show that this packet is that certain mobile node sends among this mobile network, just handles this packet according to step (E12) method;
(E14) after mobile router received this packet in the middle of all, all the operation of execution in step (E13) received this packet until the root mobile router;
(E15) after the root mobile router receives this packet, source address is wherein replaced with oneself Care-of Address, this packet is sent to the home agent of MN place mobile network's mobile router by the tunnel;
(E16) after the home agent of MN place mobile network's mobile router is received this packet, packet carried out decapsulation after, again this packet is transmitted to Correspondent Node CN, the communication process of end step (E).
9. method according to claim 7 is characterized in that: in the described communication scenes (E2), further comprise following content of operation::
(E21) CN sends packet, and source address wherein is the address of CN, and destination address is the address of mobile node MN; After this packet is forwarded to MN place mobile network's home agent according to conventional route, home agent encapsulates this packet, wherein source address is a hometown-agent-address, and destination address is the Care-of Address of root mobile router of the nested mobile network at this mobile network place; This packet also comprises second a class route field, and address wherein is the home address of MN place mobile network's mobile router; Then, this packet is forwarded to the root mobile router of nested mobile network;
(E22) after mobile router receives this packet, check earlier whether the address that second class wherein moves in the route field is identical with the home address of this mobile router, if identical, then carries out subsequent step (E23); Otherwise, redirect execution in step (E24):
(E23) address of moving in the route field because of second class in the packet is identical with the home address of this mobile router, shows that this mobile router is exactly purpose mobile node place mobile network's a mobile router; This mobile router carries out decapsulation to packet, and transmits in this mobile network; The purpose mobile node receives this packet, the communication process of end step (E);
(E24) this mobile router is according to the address in the second class route field in the packet, elder generation inquires this address pairing " next stage mobile router address " in the nested mobile network ATT after; Again with should " next stage mobile router address " replacing the destination address in this packet; Then, transmit this packet to the next stage mobile router of correspondence; After this next stage mobile router receives this packet, the operation of execution in step (E22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102030747A CN101854664B (en) | 2010-06-10 | 2010-06-10 | Method for optimizing data forwarding in nested mobile network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102030747A CN101854664B (en) | 2010-06-10 | 2010-06-10 | Method for optimizing data forwarding in nested mobile network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101854664A true CN101854664A (en) | 2010-10-06 |
| CN101854664B CN101854664B (en) | 2012-07-25 |
Family
ID=42805870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102030747A Expired - Fee Related CN101854664B (en) | 2010-06-10 | 2010-06-10 | Method for optimizing data forwarding in nested mobile network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101854664B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102164082A (en) * | 2011-04-02 | 2011-08-24 | 北京邮电大学 | MANEMO mobile network system for optimizing nested network routings and optimization method thereof |
| CN107682903A (en) * | 2017-08-24 | 2018-02-09 | 中国互联网络信息中心 | A kind of Network Mobility method for routing based on mark |
| WO2019085225A1 (en) * | 2017-10-30 | 2019-05-09 | 中国科学院声学研究所 | Fast query method for dynamic location information of mobile network entities |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003103229A1 (en) * | 2002-05-30 | 2003-12-11 | Motorola Inc. | Method and apparatus for route optimisation in nested mobile networks |
| WO2006129863A1 (en) * | 2005-05-31 | 2006-12-07 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for controlling packet forwarding, and communication node |
| CN101022381A (en) * | 2007-04-04 | 2007-08-22 | 北京交通大学 | Nested mobile network route optimizing method based on layer |
| CN101204064A (en) * | 2005-05-31 | 2008-06-18 | 松下电器产业株式会社 | Method and apparatus for controlling packet forwarding |
-
2010
- 2010-06-10 CN CN2010102030747A patent/CN101854664B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003103229A1 (en) * | 2002-05-30 | 2003-12-11 | Motorola Inc. | Method and apparatus for route optimisation in nested mobile networks |
| WO2006129863A1 (en) * | 2005-05-31 | 2006-12-07 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for controlling packet forwarding, and communication node |
| CN101204064A (en) * | 2005-05-31 | 2008-06-18 | 松下电器产业株式会社 | Method and apparatus for controlling packet forwarding |
| CN101022381A (en) * | 2007-04-04 | 2007-08-22 | 北京交通大学 | Nested mobile network route optimizing method based on layer |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102164082A (en) * | 2011-04-02 | 2011-08-24 | 北京邮电大学 | MANEMO mobile network system for optimizing nested network routings and optimization method thereof |
| CN102164082B (en) * | 2011-04-02 | 2013-07-03 | 北京邮电大学 | MANEMO mobile network system for optimizing nested network routings and optimization method thereof |
| CN107682903A (en) * | 2017-08-24 | 2018-02-09 | 中国互联网络信息中心 | A kind of Network Mobility method for routing based on mark |
| WO2019085225A1 (en) * | 2017-10-30 | 2019-05-09 | 中国科学院声学研究所 | Fast query method for dynamic location information of mobile network entities |
| KR20200075870A (en) * | 2017-10-30 | 2020-06-26 | 인스티튜트 오브 어쿠스틱스, 차이니스 아카데미 오브 사이언스 | High-speed method for dynamic location information search of mobile network entities |
| KR102298351B1 (en) | 2017-10-30 | 2021-09-03 | 인스티튜트 오브 어쿠스틱스, 차이니스 아카데미 오브 사이언스 | A high-speed inquiry method for dynamic location information of mobile network entities |
| US11218841B2 (en) | 2017-10-30 | 2022-01-04 | Institute Of Acoustics, Chinese Academy Of Sciences | Fast query method for dynamic location information of mobile network entity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101854664B (en) | 2012-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kim et al. | A lightweight NEMO protocol to support 6LoWPAN | |
| AU2003296489B2 (en) | Arrangement in a router of a mobile network for an optimizing use of messages carrying reverse routing headers | |
| JP3924502B2 (en) | Mobile communication method and mobile communication system | |
| KR101524316B1 (en) | THE METHOD FOR SUPPORTING ROUTE OPTIMIZATION IN 6LoWPAN BASED MANEMO ENVIRONMENT | |
| EP1370032B1 (en) | Mobile terminal management system, mobile terminal, agent, and program | |
| CN100589441C (en) | IP packet compression method for terminal-to-terminal link transmission | |
| EP1401173B1 (en) | Mobile communication system using source routers, destination routers and a location server, corresponding destination router and method | |
| CN102025702A (en) | Network based on identity and position separation frame, and backbone network and network element thereof | |
| US7706327B2 (en) | Mobile communication system and mobile communication terminal | |
| CN101124793A (en) | Hyrid mobile communication system comprising multi-hop-AD-HOC and circuit-switched modes | |
| CN101854664B (en) | Method for optimizing data forwarding in nested mobile network | |
| CN101637000A (en) | The header reduction of the packet that realizes by the routing optimality program | |
| CN103024720A (en) | Network mobility management method of internet protocol version 6 over low power wireless personal area network (6LoWPAN) | |
| EP1395001B1 (en) | Hierarchical mobile packet communication network and method of communication thereof | |
| US20100177689A1 (en) | Communication system, control apparatus and router using network-based ip mobility protocol and communication method for the same | |
| Gohar et al. | A distributed mobility control scheme in LISP networks | |
| CN100536418C (en) | Nested mobile network route optimizing method based on layer | |
| CN102664970A (en) | Method for hierarchical mobile IPV6 based on mobile sub-net | |
| CN101562561A (en) | Method for realizing mobile network routing and network thereof | |
| CN102625278A (en) | Mobility management method used for IPv6 low-power wireless personal area network and equipment thereof | |
| CN1332545C (en) | Mobile IPv6 routing apparatus for supporting hierarchical mobile management | |
| US11206590B2 (en) | Method for realizing wireless network convergence | |
| Senan et al. | Performance Analysis of HRO-B+ scheme for the nested mobile networks using OPNet | |
| Lam et al. | Cellular universal IP for nested network mobility | |
| CN102164082B (en) | MANEMO mobile network system for optimizing nested network routings and optimization method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20150610 |
|
| EXPY | Termination of patent right or utility model |