CN101860932A - Switch method, mobile node, router and communication system - Google Patents
Switch method, mobile node, router and communication system Download PDFInfo
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- CN101860932A CN101860932A CN200910129280A CN200910129280A CN101860932A CN 101860932 A CN101860932 A CN 101860932A CN 200910129280 A CN200910129280 A CN 200910129280A CN 200910129280 A CN200910129280 A CN 200910129280A CN 101860932 A CN101860932 A CN 101860932A
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Abstract
The invention relates to the technical field of communication, and discloses a switch method, a mobile node, a router and a communication system, wherein the switch method comprises the following steps: receiving a switch information request sent by the mobile node; acquiring the address information of a neighbor router, and sending a switch start signaling to the neighbor router according to the address information of the neighbor router; receiving a new address of the mobile node sent by the neighbor router, wherein the neighbor router sends the new address after receiving the switch start signaling; and sending the new address to the mobile node so that the mobile node can use the new address to initiate relevance reconstruction with a communication node after a communication link is interrupted. By utilizing the technical scheme provided by the embodiment of the invention, the new address of the mobile node can be determined before the communication link of the mobile node is interrupted, thus reducing switch delay.
Description
Technical field
The present invention relates to communication technical field, be specifically related to changing method, mobile node, router and communication system.
Background technology
In mobile communications network, mobile node (MN:Mobile Node) can switch to another access node from an access node inevitably, in handoff procedure, need the communication link of mobile node and access node is transferred to another access node from current access node, if in handoff procedure, the mobile node ongoing communication, in order to ensure normally carrying out of mobile node communication, it is short more good more to switch the needed time.Therefore handover management is all extremely important in any mobile network, the ongoing communication link of mobile node can be transformed into another access point from an access point by handover management.
Existing a kind of changing method that is applied to Access Network commonly used is based on identify label and station location marker separated protocol, its operation principle is as follows: mobile node occurrence positions in moving changes, when mobile node from switching preceding couple in router (oAR) to switching back couple in router (nAR) when mobile, network side is behind the communication link that disconnects mobile node, determine the new address of mobile node by route discovery mechanisms and duplicate address detection mechanism, send the address to name server (DNS:Domain Name Server) then and upgrade signaling, after Internet protocol (IP:Internet Protocol) address information that DNS is corresponding with mobile node sign (ID) is rewritten as new address, carry out end-to-end related the reconstruction again, finish mobile node the address of communication node (CN:Correspondent Node) is upgraded based on the end side separated protocol.
In research to prior art, the inventor finds: in technique scheme, network side is just determined the new address of mobile node behind the communication link that disconnects mobile node, therefore switching the needed time has comprised needed time of new address of definite mobile node having long handover delay.
Summary of the invention
The embodiment of the invention provides changing method, mobile node, router and communication system, and the technical scheme of using the embodiment of the invention to provide can be determined the new address of mobile node, thereby reduce handover delay before the communication link that disconnects mobile node.
The purpose of the embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of changing method, comprising:
Receive the handover information request that mobile node sends;
Obtain the address information of described neighbor router, switch to described neighbor router transmission according to the address information of described neighbor router and initiate signaling;
Receive the new address of the mobile node of described neighbor router transmission, described new address is sent after receiving described switching initiation signaling by described neighbor router;
Send described new address to described mobile node, so that described mobile node uses described new address to initiate related the reconstruction to communication node after disconnecting communication link.
The embodiment of the invention provides a kind of router, comprising:
Receiving element is used to receive the handover information request that mobile node sends; Receive the new address of the described mobile node of neighbor router transmission, described new address is received to switch by described neighbor router and initiates to send after the signaling;
Acquiring unit is used for obtaining the address information of neighbor router after described receiving element receives the handover information request;
Transmitting element is used for sending switching initiation signaling according to the address information of described neighbor router to described neighbor router; Send the new address that described receiving element receives to described mobile node, so that described mobile node uses described new address to initiate related the reconstruction to communication node after disconnecting communication link.
The embodiment of the invention provides a kind of mobile node, comprising:
Transmitting element is used for sending the handover information request to router;
Receiving element is used to receive described new address, and described new address is sent after receiving described handover information request by described router;
Associative cell is used for after described receiving element has received new address, disconnects communication link, and related the reconstruction initiated to communication node in the new address of using described receiving element to receive.
The embodiment of the invention provides a kind of communication system, comprising:
Router is used to receive the handover information request that mobile node sends, and obtains the address information of neighbor router; Address information according to described neighbor router sends switching initiation signaling to described neighbor router; Receive the new address of the mobile node of neighbor router transmission, described new address is received to switch by described neighbor router and initiates to send after the signaling; Send described new address to described mobile node, so that described mobile node uses described new address to initiate related the reconstruction to communication node after disconnecting communication link.
The above technical scheme that provides from the embodiment of the invention as can be seen, because route discovery was carried out before disconnecting communication link in the embodiment of the invention, therefore need behind the communication link that disconnects mobile node, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of changing method embodiment one in the embodiment of the invention;
Fig. 2 is the flow chart of changing method embodiment two in the embodiment of the invention;
Fig. 3 is the signaling process figure of changing method embodiment three in the embodiment of the invention;
Fig. 4 is the signaling process figure of changing method embodiment four in the embodiment of the invention;
Fig. 5 is the structure chart of router implementation example one in the embodiment of the invention;
Fig. 6 is the structure chart of router implementation example two in the embodiment of the invention;
Fig. 7 is the structure chart of mobile node embodiment in the embodiment of the invention;
Fig. 8 is the structure chart of communication system embodiment in the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Introduce the changing method that the embodiment of the invention provides earlier, Fig. 1 has described the flow process of changing method embodiment one, comprising:
101, receive the handover information request that mobile node sends;
The handover information request that oAR receives is determined to switch the back by mobile node and is sent, and this handover information request comprises the current address of mobile node, and the current address is that mobile node distributes by oAR; Mobile node can determine whether and need switch that L2 layer information can be signal strength information by L2 layer information; Wherein the handover information request specifically can be a router solicitation Agent Advertisement (RtSolPr); Wherein, mobile node can be subscriber equipmenies such as travelling carriage, mobile phone.
102, obtain the address information of neighbor router;
Because mobile node just can send the handover information request after determining to switch, so after oAR received the handover information request that mobile node sends, can know that mobile node need switch.Therefore oAR obtains the address information of neighbor router, specifically can obtain the address information of neighbor router by route discovery, and the address information of obtaining can comprise link layer address, IP address and the subnet prefix etc. of neighbor router;
103, the address information according to neighbor router sends switching initiation signaling to neighbor router;
OAR can send according to the address information of neighbor router to switch and initiate signaling (HI) after the address information of having obtained neighbor router; Wherein, because mobile node has many places property,, then can initiate signaling by sending to a plurality of neighbor routers to switch if oAR has obtained the address information of a plurality of neighbor routers;
104, receive the new address of the mobile node of neighbor router transmission;
After oAR sends and switches the initiation signaling, can receive the neighbor router response and switch the message of initiating the signaling transmission, can carry neighbor router in this message is the new address that mobile node distributed, and each neighbor router all can distribute a new address for mobile node; Wherein, this message specifically can be switch acknowledgment message (Hack); Wherein new address is the station location marker of mobile node;
105, send new address to mobile node, so that mobile node uses new address to initiate related the reconstruction to communication node after disconnecting communication link.
After oAR has received the new address of mobile node, send the new address that receives to mobile node; Wherein, if the quantity of new address then can send by the mode of new address list greater than one; Specifically can send new address by quick binding acknowledgement message (FBack).When needs send new address by new address list, can improve FBack, use station location marker tabulation (Locator List) field of FBack to carry new address.Can certainly adopt other modes or other message to send new address, the embodiment of the invention does not limit how sending new address.
After mobile node is received new address, can disconnect communication link, use new address to initiate related the reconstruction, thereby use the communication link of foundation of new address and communication node to communication node, after having set up communication link, just can use new address and communication node to communicate; Specifically can send the related update request and initiate related the reconstruction to communication node.
Wherein the related update request of Fa Songing is different and different according to switching the agreement that is adopted, for example can be based on the update request (Update_Req) of end side separated protocol, can be based on the update request (Shim6_Update) of Shim6 agreement, the embodiment of the invention does not limit which kind of message of concrete employing as the related update request yet.
Further,, then at first need from least two new addresses, to select a new address of first-selection (primary-nCoA), and then use first-selected new address to initiate related the reconstruction to communication node if mobile node has been received at least two new addresses.Wherein, first-selected new address can be determined according to the regulation of RFC3484.
From the above, the new address of mobile node obtains before communication link disconnects in the present embodiment, therefore need behind the communication link that disconnects mobile node, just not determine the new address of mobile node, the needed time of new address of promptly determining mobile node can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.
In the changing method embodiment that the embodiment of the invention provides, router can be further sends to mobile node with the address information of neighbor router after the address information of having obtained neighbor router; Make mobile node send quick neighbor advertisement message to neighbor router according to the address information of neighbor router.
Mobile node is after having obtained new address, can quick neighbor advertisement message be sent to corresponding neighbor router by the address information of neighbor router, fast neighbor advertisement message comprises the new address of mobile node, and this neighbor router is the neighbor router that distributes the new address that mobile node obtains; Wherein, if mobile node obtains is at least two new addresses, what then neighbor advertisement message comprised fast is the first-selected new address of selecting, and neighbor advertisement message also is the neighbor router that sends to first-selected new address correspondence fast.
New address is sent to neighbor router, can guarantee that neighbor router upgrades the information of mobile mobile node, reserve certain resource, guarantee proceeding of mobile mobile node business.
Fig. 2 has described the flow process of the changing method embodiment two that the embodiment of the invention provides, comprising:
201, oAR receives the handover information request that mobile node sends;
This step is carried out with reference to 101;
202, oAR obtains the address information of neighbor router;
This step is carried out with reference to 102;
203, oAR sends switching initiation signaling according to the address information of neighbor router to neighbor router; Send the address information of neighbor router to mobile node;
Wherein, can the address information of neighbor router be sent to mobile node by handover information request responding message; Particularly, when the handover information request was the request broker announcement, response message can be agent router notice message (PrRtAdv);
204, oAR receives the new address of the mobile node of neighbor router transmission, and this new address is sent after having received switching initiation signaling by neighbor router;
This step is carried out with reference to 104;
205, the oAR buffer memory need be sent to the data of mobile node;
Because communication node does not also know that mobile node need switch, therefore can send data to mobile node always, for fear of the loss of data that communication node sends, oAR can be sent to communication node the data of mobile node and carry out buffer memory;
206, oAR sends new address to mobile node;
This step is carried out with reference to 105;
207, mobile node sends quick neighbor advertisement message according to the address information of neighbor router to neighbor router;
Fast neighbor advertisement message comprises the new address of mobile node, can be first-selected new address when a plurality of new address is arranged; Particularly, after having selected first-selected new address, can send quick neighbor advertisement message to the neighbor router that has distributed first-selected new address;
208, after neighbor router is received quick neighbor advertisement message, send forwarding to oAR and trigger (RTR:Retransmission TRigger) message;
After neighbor router is received quick neighbor advertisement message, can know that mobile node begins to switch, can to oAR send transmit and trigger message in order to guarantee the continuity of mobile node business this moment; Wherein, transmit to trigger message and can adopt the neighbour of the ICMPv6 known message such as notification packet of standing.Simultaneously, this neighbor router also can be registered the new address or the first-selected new address of mobile node.
209, oAR sends to neighbor router with data in buffer after having received RTR message; Neighbor router sends the data to mobile node;
After neighbor router is received the data of router cache, can send the data to mobile node, make mobile node can continue to receive data, guarantee professional continuity from communication node.
210, mobile node disconnects communication link, uses new address to initiate related the reconstruction to communication node.
This step is carried out with reference to 106.
Being understandable that the execution sequencing of step only is a kind of mode that present embodiment provides in the present embodiment, is not that step is carried out qualification successively.
From the above, route discovery was carried out before disconnecting communication link in the present embodiment, therefore need behind the communication link that disconnects mobile node, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.Further, router can send to the data of mobile node by the buffer memory communication node in the present embodiment, thereby guarantees that the data that communication node sent to mobile node all send to mobile node, guarantee the continuity of mobile node business.
The embodiment of the invention has further been introduced local mapping server (LMS:Local Mapping Server), by LMS the identify label and the address information thereof of the mobile node of part is carried out record, for other querying nodes; Then mobile node sends to new address the local mapping server of mobile node ownership after having obtained the new address that is sent by oAR; After the local mapping server of mobile node ownership has obtained the new address of mobile node, the information of mobile node is upgraded according to new address.Because LMS has only write down the identify label and the address information of local mobile node, therefore can reduce the quantity of the mobile node of record effectively; Therefore adopt LMS can reduce data volume with directly the data on the DNS being upgraded to compare, improve inquiry velocity.
Particularly, mobile node can send to new address the local mapping server of mobile node ownership by update request, update request can also comprise except the new address that comprises mobile node: the sign of mobile node, the sign of the local mapping server of mobile node ownership, wherein the sign of the home server of mobile node ownership can allow local mapping server judge whether update request sends to self, thereby guarantees the correctness upgraded; Certainly, can also carry a random number (nonce) in update request, nonce takies 128 bits.
If communication node is also switching, then directly send the related update request to communication node, communication node may not receive, thereby cause handoff failure, therefore after having introduced LMS, the local mapping server that the mobile node in the changing method that the embodiment of the invention provides can further belong to communication node sends the related update request; After the local mapping server of communication node ownership has received the related update request, transmit the related update request to communication node.Wherein, can comprise the sign of communication node in the related update request, make the local mapping server of communication node ownership correctly the related update request is forwarded to communication node, guarantee handover success.
Fig. 3 has described the signaling process figure of the changing method embodiment three that the embodiment of the invention provides, and the general quick handover scheme (GF-HO) that is based on the end side separated protocol that present embodiment is described comprising:
301, MN determines to move to nAR;
MN specifically can be according to receiving that L2 layer information determines whether to move to nAR, as signal strength information etc.;
302, MN sends the router solicitation Agent Advertisement to oAR, asks potential handover information;
303, oAR is after obtaining the address information of neighbor router, send the agent router notice message to MN, the agent router notice message can comprise the address information of the neighbor router that obtains, and wherein address information specifically can comprise link layer address, IP address and subnet prefix etc.;
304, after MN receives the agent router notice message, send quick binding update messages (FBU:Fast Binding Update) to oAR.
305, after oAR receives quick binding update messages, beginning data cachedly, specifically is buffer memory is sent to MN by communication node data.
306, oAR sends to switch and initiates signaling to nAR; Because mobile node has many places property, oAR can send to switch and initiate signaling to all neighbor routers of finding by route discovery mechanisms;
307, oAR receives the switch acknowledgment message from nAR; Switch acknowledgment message comprises the new address of the mobile node that nAR distributes; Wherein, initiate signaling, then can receive the switch acknowledgment message that a plurality of nAR send, correspondingly have a plurality of new addresses if oAR has sent to switch to a plurality of nAR;
308, oAR sends quick binding acknowledgement message (FBack) to MN, and FBack includes the new address of MN, if a plurality of new address can send by the form of new address list.The structure of a kind of FBack message that can carry new address that the embodiment of the invention provides is as shown in table 1.
Table 1
As shown in table 1, the FBack message that the embodiment of the invention provides can comprise type (Type) field of 8 bits; The state of 8 bits (Status) field; The flag bit K of 1 bit; The reserved field of 15 bits, the sequence number of 16 bits (Sequence#) field, this sequence number is identical with sequence number in the quick binding update messages; The life cycle of 16 bits (Lifetime) field, this field represents that transmit leg is the time that redirect traffic keeps binding, with second (s) be unit; And station location marker tabulation (Locator List) field, available at least 1 station location marker of mobile node, this moment, each address was unordered, do not need to carry out prioritization, the length of this field is determined according to the quantity and the employed agreement of station location marker, for example, the length of this field is the integral multiple of 32 bits when using IPv4, and the length of this field is the integral multiple of 128 bits when using IPv6.
309, MN selects first-selected new address from the new address list that obtains, and wherein selects the process of first-selected new address to carry out according to the principle of RFC3484 regulation; If MN only obtains a new address, then directly should new address as the new address of first-selection; MN sends quick neighbor advertisement message (FNA) according to the new address of first-selection to this nAR.This nAR is for distributing the neighbor router of first-selected new address.
310, nAR sends forwarding triggering message to data cached oAR after receiving FNA, and notice oAR begins the forwarding cache data.
Wherein, transmit to trigger message and can adopt the neighbour of the ICMPv6 notification packet of standing, also can adopt other messages to realize identical function, the embodiment of the invention does not trigger message and does not specifically adopt which kind of message to limit transmitting.
311, after oAR receives and transmits triggering message, carry out data cached forwarding, data in buffer is forwarded to MN by the tunnel via nAR.Wherein, this tunnel is set up after nAR and oAR have finished quick binding update messages/FBack.
312, MN sends related update request (Update_Req) to CN, and beginning is related rebuilds.
313, CN returns R1bis message to MN immediately after the related update request that receives from MN.
314, after MN receives R1bis, send 12bis message to CN;
315, after CN receives 12bis message, return related update response (update_ack) message, finish related the reconstruction to MN;
316, use new communication link to carry out transfer of data.
Being understandable that present embodiment only is a kind of implementation that the embodiment of the invention provides to the numbering of step, is not that step is carried out qualification successively, and for example 312 as long as carry out the realization that can not influence the embodiment of the invention in 308 backs.
From the above, route discovery was carried out before disconnecting communication link in the present embodiment, therefore need behind the communication link that disconnects MN, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.Further, oAR can send to the data of MN by the buffer memory communication node in the present embodiment, thereby guarantees that the data that CN sent to MN all send to MN, guarantee the continuity of MN business.
Fig. 4 has described the signaling process figure of the changing method embodiment four that the embodiment of the invention provides, this embodiment compares the reciprocal process that has increased MN and LMS with changing method embodiment three, the quick handover scheme (FH-Shim6) that is based on the Shim6 agreement that present embodiment is described comprising:
401, MN determines to move to nAR;
MN specifically can according to receiving L2 layer information determines whether mobile node moves to nAR, as signal strength information etc.;
402, MN sends the router solicitation Agent Advertisement to oAR, asks potential handover information;
403, oAR is after obtaining the address information of neighbor router, send the agent router notice message to MN, the agent router notice message can comprise the address information of the neighbor router that obtains, and wherein address information specifically can comprise link layer address, IP address and subnet prefix etc.;
404, after MN receives the agent router notice message, send quick binding update messages to oAR.
405, after oAR receives quick binding update messages, begin data cachedly, concrete buffer memory is sent to the data of MN by CN.
406, oAR sends to switch and initiates signaling to nAR; Because mobile node has many places property, oAR can send to switch and initiate signaling to all neighbor routers of finding by route discovery mechanisms;
407, oAR receives the switch acknowledgment message from nAR; Switch acknowledgment message comprises the new address of the mobile node that nAR distributes; Wherein, initiate signaling, then can receive the switch acknowledgment message that a plurality of nAR send, correspondingly have a plurality of new addresses if oAR has sent to switch to a plurality of nAR;
408, oAR sends quick binding acknowledgement message to MN, and binding acknowledgement message comprises the new address of MN fast, if a plurality of new address can send by the form of new address list.
409, MN goes out first-selected new address from the new address list that obtains, and wherein selects first-selected address to carry out according to the principle of RFC3484 regulation; If MN only obtains a new address, then directly should new address as the new address of first-selection; MN sends quick neighbor advertisement message according to the new address of first-selection to this nAR.This nAR is for distributing the neighbor router of first-selected new address.
410, nAR sends forwarding triggering message to data cached oAR after receiving FNA, and notice oAR begins the forwarding cache data.
Wherein, RTR specifically can adopt the neighbour of the ICMPv6 notification packet of standing.
411, after oAR receives RTR, carry out data cached forwarding, data in buffer is forwarded to MN by the tunnel via nAR.Wherein, the tunnel is set up after nAR and oAR have finished FBU/FBack.
412, MN sends station location marker list update (LocList_Update) message to the LMS1 of its ownership, and this message is carried the new address information from oAR that MN receives; LocList_Update message is based on the message of Shim6 agreement; The form of a kind of LocList_Update message that the embodiment of the invention provides is as shown in table 2:
Table 2
As shown in table 2, a kind of LocList_Update message that the embodiment of the invention provides comprises 59 fields of 8 bits, represents that the leader of next message is known (Next Header), the type of 8 bits (Type) field; The life cycle of 8 bits (Lifetime) field; The reservation of 7 bits (Reserved) field; The flag bit 0 of 1 bit; The request random number of 32 bits (Request Nonce) field, one the 32 bit random number that mobile node is chosen requires recipient's former state in response to return; The identify label of the destination of 128 bits (Dst_ULID) field; Identify label (Src_ULID) field of the source end of 128 bits; Station location marker tabulation (Src_LocList) field of the source end of the integral multiple of 128 bits; And the parameter of the integral multiple of 32 bits (Options) field, the option definition of this field comprises: the priority of station location marker (Locator Preferences), if the priority difference of each station location marker can be selected this; CGA Parameters data structure (CGA Parameter Data Structure) if the station location marker tabulation exists, for the recipient can verify this tabulation, can be selected this; CGA signs (CGA Signature), if the station location marker in the tabulation has adopted the CGA authentication, can select this.Wherein the length of the identify label field of the identify label field of destination and source end is 32 bits using IPv4; The length of the station location marker list field of source end is the integral multiple of 32 bits using IPv4.
413, after LMS1 receives LocList_Update message, upgrade affirmation (LocList_UpdateAck) message, and the information of the MN of preservation is upgraded according to the new address information in the LocList_Update message to MN home position identification list;
LocList_UpdateAck message is based on the message of Shim6 agreement; The form of a kind of LocList_UpdateAck message that the embodiment of the invention provides is as shown in table 3:
Table 3
As shown in table 3, a kind of LocList_Update message that the embodiment of the invention provides comprises 59 fields of 8 bits, represents that the leader of next message is known (Next Header), the type of 8 bits (Type) field; The life cycle of 8 bits (Lifetime) field; The reservation of 7 bits (Reserved) field; The flag bit 0 of 1 bit; The request random number of 32 bits (Request Nonce) field, one the 32 bit random number that mobile node is chosen requires recipient's former state in response to return; The identify label of the destination of 128 bits (Dst_ULID) field; Identify label (Src_ULID) field of the source end of 128 bits
414, MN sends related update request (shim6_Update) based on the shim6 agreement to the LMS2 of CN and CN ownership, after LMS2 receives shim6_Update, directly shim6_Update is transmitted to CN, and beginning is related rebuilds.
415, CN returns R1bis message to MN behind the shim6_Update that receives from MN or LMS2.Wherein,, receive after then not handling, if receive simultaneously then handle wherein any one if CN has received the shim6_Update of MN and LMS2.
416, after MN receives R1bis, send 12bis message to CN;
417, after CN receives 12bis message, return based on the related update of shim6 agreement to MN and to confirm (Shim6_UpdateAck) message, finish related the reconstruction;
418, use new communication link to carry out transfer of data.
From the above, route discovery was carried out before disconnecting communication link in the present embodiment, therefore need behind the communication link that disconnects MN, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.Further, oAR can send to the data of MN by the buffer memory communication node in the present embodiment, thereby guarantees that the data that CN sent to MN all send to MN, guarantee the continuity of MN business.Further, MN can send to LMS with new address and upgrades in the present embodiment, like this when CN also switches, by the related update request being sent to the LMS of CN ownership, by LMS the related update request is transmitted to CN again, can guarantee that CN can receive the related update request, guarantees handover success.
Fig. 5 has described the structure of the router implementation example one that the embodiment of the invention provides, and comprising:
Receiving element 501 is used to receive the handover information request that mobile node sends; Receive the new address of the mobile node of neighbor router transmission, this new address is received to switch by neighbor router and initiates to send after the signaling;
Acquiring unit 502 is used for obtaining the address information of neighbor router after receiving element 501 has received the handover information request;
Transmitting element 503, the address information that is used for the neighbor router that obtains according to route discovery unit 502 sends to switch to neighbor router initiates signaling; Send the new address that receiving element 501 receives to mobile node, so that mobile node uses new address to initiate related the reconstruction to communication node after disconnecting communication link.
From the above, the present embodiment of use router can be given way and be carried out before mobile mobile node disconnects communication link by discovery, therefore need behind the communication link that disconnects mobile node, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.
Fig. 6 has described the structure of the router implementation example two that the embodiment of the invention provides, and comprising:
Receiving element 601 is used to receive the handover information request that mobile node sends; Receive the new address of the mobile node of neighbor router transmission, this new address is received to switch by neighbor router and initiates to send after the signaling; Reception triggers signaling from the forwarding of neighbor router;
Buffer unit 602 is used for after receiving element 601 has received new address, and buffer memory need be sent to the data of mobile node;
Acquiring unit 603 is used for obtaining the address information of neighbor router after receiving element 601 has received the handover information request;
Transmitting element 604, the address information that is used for the neighbor router that obtains according to route discovery unit sends to switch to neighbor router initiates signaling; Send the new address that receiving element 601 receives to mobile node, so that mobile node uses new address to initiate related the reconstruction to communication node after disconnecting communication link; Buffer unit 602 data in buffer are sent to neighbor router, so that neighbor router sends the data to mobile node.
From the above, the present embodiment of use router can be given way and be carried out before mobile mobile node disconnects communication link by discovery, therefore need behind the communication link that disconnects mobile node, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience; Further, the present embodiment of router can send to the data of mobile node by the buffer memory communication node, thereby guarantees that the data that communication node sent to mobile node all send to mobile node, guarantee the continuity of mobile node business.
Further, the included transmitting element of router implementation example that provides of the embodiment of the invention can also be used for the address information of neighbor router is sent to mobile node.Make mobile node send message to the new router of mobile node ownership according to the address information of neighbor router; Wherein, when a plurality of neighbor router was arranged, the new router of mobile node ownership was the router of first-selected new address correspondence.
Further, the included transmitting element of router implementation example that provides of the embodiment of the invention also is used for the data from other routers are sent to corresponding mobile node.The data of other router caches can be sent to corresponding mobile node when making router, make this corresponding mobile node can keep professional continuity as nAR.
Fig. 7 has described the structure of the mobile node embodiment that the embodiment of the invention provides, comprising:
Transmitting element 701 is used for sending the handover information request to router;
Receiving element 702 is used to receive new address, and new address is sent after receiving the handover information request by router;
Particularly, router obtains the address information of neighbor router after having received the handover information request, and the address information according to neighbor router sends switching initiation signaling to neighbor router again; Receive the new address of the mobile node of neighbor router transmission, this new address is received to switch by neighbor router and initiates to send after the signaling.
From the above, use the present embodiment of mobile node can allow router carry out route discovery before mobile node disconnects communication link, therefore need behind the communication link that disconnects mobile node, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.
Further, the mobile node embodiment that the embodiment of the invention provides can also comprise selected cell, is used for selecting first-selected address newly from least two new addresses when receiving new address that the unit receives at least two; At this moment, transmitting element 701, the related reconstruction initiated to communication node in the first-selected new address that is used to use selected cell to select.
Further, the included receiving element 702 of mobile node embodiment that provides of the embodiment of the invention can also be used for the address information of the neighbor router that receiving router sends;
This moment, transmitting element 701 can also be used for sending quick neighbor advertisement message according to the address information of neighbor router to neighbor router, so that the neighbor router reserved resource.
Further, the included transmitting element 701 of the mobile node embodiment that the embodiment of the invention provides can also be used for the new address that receiving element 701 receives is sent to the local mapping server of mobile node ownership, so that the local mapping server of mobile node ownership can upgrade mobile node information, specifically can be that the address that mobile node is previous is updated to new address, guarantee the validity of the mobile node information of local mapping server record.
Further, the included transmitting element 701 of the mobile node embodiment that the embodiment of the invention provides can also be used for sending the related update request to the local mapping server of communication node ownership, so that the local mapping server of communication node ownership is transmitted the related update request to communication node.Because communication node is also when switching, communication node also can use new address, the related update request communication node that this moment, mobile node directly sent to communication node may can not receive, therefore the local mapping server that the related update request is sent to the communication node ownership can be guaranteed at communication node also when switching, the related update request can be sent to communication node, guarantees handover success.
Fig. 8 has described the structure of the communication system embodiment that the embodiment of the invention provides, comprising:
From the above, router was carried out route discovery before mobile node disconnects communication link in the present embodiment, therefore need behind the communication link that disconnects mobile node, not determine the distribution address that mobile node is new by route discovery mechanisms, be the needed time of route discovery can't be embodied in the handover delay, thereby the minimizing handover delay can strengthen user experience.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than changing method, mobile node, router and communication system that the embodiment of the invention provided are described in detail, the explanation of above embodiment just is used for help understanding method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (15)
1. a changing method is characterized in that, comprising:
Receive the handover information request that mobile node sends;
Obtain the address information of described neighbor router, switch to described neighbor router transmission according to the address information of described neighbor router and initiate signaling;
Receive the new address of the mobile node of described neighbor router transmission, described new address is sent after receiving described switching initiation signaling by described neighbor router;
Send described new address to described mobile node, so that described mobile node uses described new address to initiate related the reconstruction to communication node after disconnecting communication link.
2. changing method as claimed in claim 1 is characterized in that, further comprises after obtaining the address information of neighbor router:
The address information of described neighbor router is sent to described mobile node, and described mobile node sends quick neighbor advertisement message according to the address information of described neighbor router to neighbor router, so that described neighbor router reserved resource.
3. changing method as claimed in claim 2 is characterized in that, further comprises after receiving the new address of the mobile node that described neighbor router sends:
Buffer memory need be sent to the data of described mobile node;
Reception triggers signaling from the forwarding of described neighbor router;
The described data of buffer memory are sent to described neighbor router, so that described neighbor router sends to described mobile node with described data.
4. as the arbitrary described changing method of claim 1 to 3, it is characterized in that, obtain described new address from neighbor router and be at least two;
Described mobile node use described new address to communication node initiate related rebuild to take a step forward comprise:
Described mobile node is selected first-selected new address at least from described two new addresses;
Described mobile node uses described new address to initiate related the reconstruction and is specially: described mobile node uses the new address of described first-selection to initiate related the reconstruction to communication node.
5. as the arbitrary described changing method of claim 1 to 3, it is characterized in that, described new address is further sent to the local mapping server of described mobile node ownership by described mobile node, so that the local mapping server of described mobile node ownership upgrades the information of described mobile node according to described new address.
6. changing method as claimed in claim 5, it is characterized in that, described mobile node further sends described related update request to the local mapping server of described communication node ownership, so that the local mapping server of described communication node ownership is transmitted described related update request to described communication node.
7. a router is characterized in that, comprising:
Receiving element is used to receive the handover information request that mobile node sends; Receive the new address of the described mobile node of neighbor router transmission, described new address is received to switch by described neighbor router and initiates to send after the signaling;
Acquiring unit is used for obtaining the address information of neighbor router after described receiving element receives the handover information request;
Transmitting element is used for sending switching initiation signaling according to the address information of described neighbor router to described neighbor router; Send the new address that described receiving element receives to described mobile node, so that described mobile node uses described new address to initiate related the reconstruction to communication node after disconnecting communication link.
8. router as claimed in claim 7 is characterized in that, described transmitting element also is used for the address information of described neighbor router is sent to described mobile node.
9. router as claimed in claim 7 is characterized in that, also comprises:
Buffer unit is used for after described receiving element has received new address, and buffer memory need be sent to the data of described mobile node;
The forwarding that described receiving element also is used to receive from described neighbor router triggers signaling;
Described transmitting element also is used for data in buffer being sent to described neighbor router, so that described neighbor router sends to described mobile node with described data after described receiving element has received forwarding triggering signaling.
10. a mobile node is characterized in that, comprising:
Transmitting element is used for sending the handover information request to router;
Receiving element is used to receive described new address, and described new address is sent after receiving described handover information request by described router;
Associative cell is used for after described receiving element has received new address, disconnects communication link, and related the reconstruction initiated to communication node in the new address of using described receiving element to receive.
11. mobile node as claimed in claim 10 is characterized in that, the new address that described receiving element receives is at least two; Described mobile node also comprises:
Selected cell is used for selecting from described at least two new addresses first-selected new address;
Described transmitting element, the related reconstruction initiated to communication node in the first-selected new address that is used to use described selected cell to select.
12. mobile node as claimed in claim 10 is characterized in that, described receiving element also is used for the address information of the neighbor router of receiving router transmission;
Described transmitting element also is used for sending quick neighbor advertisement message according to the address information of described neighbor router to neighbor router, so that described neighbor router reserved resource.
13. mobile node as claimed in claim 10, it is characterized in that, described transmitting element also is used for the new address that described receiving element receives is sent to the local mapping server of described mobile node ownership, so that the local mapping server of described mobile node ownership upgrades the information of described mobile node according to described new address.
14. mobile node as claimed in claim 13, it is characterized in that, described transmitting element also is used for sending described related update request to the local mapping server of described communication node ownership, so that the local mapping server of described communication node ownership is transmitted described related update request to described communication node.
15. a communication system is characterized in that, comprising:
Router is used to receive the handover information request that mobile node sends, and obtains the address information of neighbor router; Address information according to described neighbor router sends switching initiation signaling to described neighbor router; Receive the new address of the mobile node of neighbor router transmission, described new address is received to switch by described neighbor router and initiates to send after the signaling; Send described new address to described mobile node, so that described mobile node uses described new address to initiate related the reconstruction to communication node after disconnecting communication link.
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| CN200910129280A CN101860932A (en) | 2009-04-09 | 2009-04-09 | Switch method, mobile node, router and communication system |
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| CN200910129280A CN101860932A (en) | 2009-04-09 | 2009-04-09 | Switch method, mobile node, router and communication system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103188752B (en) * | 2011-12-31 | 2016-12-28 | 北京大唐高鸿数据网络技术有限公司 | A kind of method for switching network of mobile terminal zero packet loss under novel routing architecture |
| CN108777874A (en) * | 2018-05-31 | 2018-11-09 | 安徽电信器材贸易工业有限责任公司 | A kind of method and its system that router mutually switches |
| CN109788078A (en) * | 2017-11-13 | 2019-05-21 | 华为技术有限公司 | Application server switching method, equipment and system |
| CN110233889A (en) * | 2019-06-11 | 2019-09-13 | 常熟理工学院 | A kind of network data communication implementation method based on caching mechanism |
| US11671373B2 (en) | 2019-07-31 | 2023-06-06 | Huawei Technologies Co., Ltd. | Systems and methods for supporting traffic steering through a service function chain |
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- 2009-04-09 CN CN200910129280A patent/CN101860932A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188752B (en) * | 2011-12-31 | 2016-12-28 | 北京大唐高鸿数据网络技术有限公司 | A kind of method for switching network of mobile terminal zero packet loss under novel routing architecture |
| CN109788078A (en) * | 2017-11-13 | 2019-05-21 | 华为技术有限公司 | Application server switching method, equipment and system |
| CN109788078B (en) * | 2017-11-13 | 2020-10-16 | 华为技术有限公司 | Application server switching method, device and system |
| CN108777874A (en) * | 2018-05-31 | 2018-11-09 | 安徽电信器材贸易工业有限责任公司 | A kind of method and its system that router mutually switches |
| CN110233889A (en) * | 2019-06-11 | 2019-09-13 | 常熟理工学院 | A kind of network data communication implementation method based on caching mechanism |
| CN110233889B (en) * | 2019-06-11 | 2021-09-14 | 常熟理工学院 | Network data communication implementation method based on cache mechanism |
| US11671373B2 (en) | 2019-07-31 | 2023-06-06 | Huawei Technologies Co., Ltd. | Systems and methods for supporting traffic steering through a service function chain |
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