CN1784059A - Fast switching method in MAP field of HMIPv6 - Google Patents
Fast switching method in MAP field of HMIPv6 Download PDFInfo
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Abstract
This invention relates to a quick switching method for HMIPv6 within MAP domain. It contains affirming the switching in MAP domain by proxy router to construct new link care-of address, original access router sending switch triggering to all possible new access router which checks said care-of address and then sending local binding updating of new link care-of address, MAP buffering local binding information, MAP redirecting the database sent to mobile node according to preset strategy, the receiving, transmitting package not needing the tunnel through original router and new router. Said invention raises mobile switching speed and quality.
Description
Technical field
The present invention relates to the moving communicating field of internet, in particular in mobile anchor point MAP (Mobility Anchor Point) territory, carry out fast switching method between different sub-network at mobile node under the wireless mobile environment according to HMIPv6 (classification mobile IP the 6th edition).
Background technology
Internet engineering task tissue (Internet Engineering Task Force is hereinafter to be referred as IETF) is in formal mobile IP v 6 (Mobility Support in IPv6 is called for short MIPv6) the agreement RFC3775 that proposes of in June, 2004.MIPv6 is that mobile node (Mobile Node is called for short MN) can provide the network layer support by connected reference Internet when moving.
The standard of RFC3775 definition is switched regulation, when mobile node when a field network moves to another field network, because network prefix changes, its Care-of Address (Care of Address in field network, be called for short CoA) also change thereupon, need register new CoA respectively to home agent (HomeAgent is called for short HA) and communication node (Correspondent Node is called for short CN).When mobile node moved to field network away from home network, standard is switched and had two problems: 1) switching time was long; 2) message dropping is more serious in the handoff procedure.Therefore standard is switched the requirement that can not satisfy real time business such as VoIP etc.
In order to address the above problem, the MIPv6 signaling of IETF and handover optimization working group (mipshop) have proposed several optimization handover schemes.
In the draft Hierarchical Mobile IPv6 mobilitymanagement (HMIPv6) of in June, 2004 issue, defined a kind of level MIPv6 handover scheme.This scheme is divided into not same area to contiguous IPv6 network, each territory is by one or more mobile anchor points (MobilityAnchor Point, be called for short MAP, be the router in the field network) manage, when mobile node moves into a MAP territory, obtain IP address and the subnet prefix of MAP from router advertisement, thereby generate regional care-of address (the Regional CoA of mobile node, be called for short RCoA) and on-link care-of address (On_link CoA is called for short LCoA).Mobile node is used as Care-of Address and home agent and communication node to RCoA on the one hand and is bound, on the other hand LCoA is used as that Care-of Address, RCoA are used as home address and MAP binds (promptly local binding), thereby between MAP and mobile node, set up communication tunnel, be responsible for all messages between reception and forwarding mobile node and home agent and communication node.When mobile node was mobile between the different sub-network in MAP territory, mobile node only need change LCoA and carry out this locality binding to MAP, does not need to bind again with home agent and communication node.Therefore HMIPv6 can quicken to switch, and reduces network overhead.
In the draft Fast Handovers for Mobile IPv6 (FMIPv6) of in July, 2004 issue, defined a kind of quick MIPv6 handover scheme.This scheme utilizes radio link layer to trigger, and before switching beginning, finishes the part handover operation, thereby accelerates switch speed.The basic principle of FMIPv6 is summarized as follows: mobile node is subjected to the Radio Link triggering and sends proxy router solicitation (Router Solicitation for Proxy Advertisment to the primary access router of current sub network, be called for short RtSolPr), primary access router returns agent router bulletin (the Proxy Router Advertisment of the new couple in router address that comprises request, be called for short PrRtAdv), mobile node utilization new couple in router address and interface message are constructed new Care-of Address, send quick Binding Update (Fast Bindng Update to primary access router then, be called for short FBU), primary access router sends handover trigger (the Handover Initiate that comprises above-mentioned new Care-of Address to new couple in router, be called for short HI), new couple in router is duplicate address detection (Duplicate AddressDetection to new Care-of Address, be called for short DAD), and return the switching that comprises testing result to primary access router and announce (Handover Acknowledge, be called for short HAck), to set up the bidirectional tunnel of former Care-of Address if detect successfully former router to new Care-of Address, before the Binding Update of mobile node and communication node finishes, primary access router sends to new couple in router territory by the grouping that the tunnel will send to the former Care-of Address of mobile node, mobile node is then transmitted through primary access router by reverse tunnel with the grouping that new Care-of Address sends, then the binding success of primary access router former Care-of Address of notice mobile node and new Care-of Address.Actual switching takes place in mobile node, disconnects former subnet and connects, and inserts new subnet, sends quick neighbours' bulletin (Fast NeighborAdvertisment is called for short FNA) notice new router switching then immediately and finishes.
HMIPv6 and FMIPv6 switch standard from different perspectives respectively and optimize, and the suitable combination of the two certainly will produce more excellent switching effect.But directly in HMIPv6, use FMIPv6 and have delay and bandwidth efficiency problem, this be because, the general convergence router of selecting to be positioned on the couple in router is MAP in HMIPv6, if directly use FMIPv6 this moment, mobile node just must be transmitted through double tunnel with communicating by letter of the external world between transfer period, at first being the tunnel of MAP and primary access router, is the tunnel between primary access router and new couple in router then.
Therefore, there is defective in prior art, and awaits improving and development.
Summary of the invention
The purpose of this invention is to provide fast switching method in the MAP territory of a kind of HMIPv6 of being used for, avoid HMIPv6 and FMIPv6 directly to combine under the situation, mobile node must be transmitted the problem that causes switching delay and bandwidth availability ratio to descend through double tunnel with communicating by letter of the external world between transfer period; Simultaneously, because the mobile hand-held device resource is generally relatively more nervous, the quick switching in the MAP territory of the inventive method realization HMIPv6 to improve the switch speed of MIPv6 under wireless mobile environment, reduces the expense of the mobile management aspect of mobile node simultaneously.
Technical scheme of the present invention is as follows:
Fast switching method in a kind of MAP territory that is used for HMIPv6 said method comprising the steps of:
When switching between the different sub-network in the MAP territory of mobile node at HMIPv6, mobile node only need be constructed new on-link care-of address and be carried out local Binding Update to MAP, and mobile node is before switching generation:
A) utilize proxy router solicitation/agent router bulletin to confirm to switch between primary access router and the new couple in router and will occur in the MAP territory, construct new on-link care-of address;
B) primary access router sends handover trigger to all possible new couple in router, new couple in router is upchecked behind the new on-link care-of address, send the local Binding Update of new on-link care-of address immediately to MAP, the local binding information of MAP buffer memory comprises user mode regional care-of address and bindings one or more on-link care-of addresses and on-link care-of address;
C) after MAP this locality was bound successfully, the policy redirection that utilizes local binding form basis to be scheduled to mail to the packet of mobile node, and the transmitting-receiving bag of mobile node no longer needs through the tunnel between primary access router and new couple in router;
D) described new couple in router returns to primary access router and switches bulletin, if switching, mobile node inserts the new subnet of prediction within the effective time of Binding Update regulation, mobile node sends quick neighbours and announces to switch to new router notice and finish, new couple in router sends to mobile node with the grouping of buffer memory, and will substitute mobile node and periodically send local Binding Update to MAP, MAP will correspondingly upgrade the local binding information of buffer memory; Otherwise this locality binding on the new router on the on-link care-of address of buffer memory, grouping and the MAP will be timed deletion.
Described method, wherein, described step a) also comprises
A1) described mobile node receives the trigger message from radio link layer, the link layer address that comprises new WAP (wireless access point) in the trigger message, mobile node sends proxy router solicitation to the primary access router of current connection, asks the couple in router address and the new subnet prefix information of new WAP (wireless access point) correspondence;
A2) after primary access router was received the request of mobile node, the route-map of inquiry new access point correspondence from the neighbor router of local cache and access-in point information returned the agent router bulletin to the mobile node of primary access router;
A3) described mobile node forms new Care-of Address according to the agent router bulletin, sends quick Binding Update to primary access router then.
Described method, wherein, described step b) also comprises
B1) if new couple in router exists and belongs to a MAP territory with primary access router, described primary access router sends the handoff trigger message of band M sign to new couple in router, except the mobile node link address that comprises the FMIPv6 regulation, former on-link care-of address, new on-link care-of address, also comprise the regional care-of address of mobile node in the handoff trigger message;
B2) described new couple in router is received the handover trigger of band M sign, check the validity of new on-link care-of address in the handover trigger, and adjacent machine is acted on behalf of new on-link care-of address in the time of appointment; If on-link care-of address is invalid and new router can not be distributed new on-link care-of address, new router is established to the main frame route of former on-link care-of address;
B3) described new couple in router sends local Binding Update to MAP, if new on-link care-of address inspection or be allocated successfully, in the local Binding Update message, new on-link care-of address is placed alternative Care-of Address mobile option, regional care-of address places the home address option; Otherwise, former on-link care-of address is placed alternative Care-of Address mobile option, the new region Care-of Address places the home address option;
B4) described MAP writes down the couple in router address that sends local Binding Update after receiving local Binding Update, and regional care-of address and on-link care-of address are bound, and described MAP safeguards these information in local binding information table;
B5) described MAP returns the binding bulletin to new couple in router.
Described method, wherein, described step c) also comprises
C1) described MAP is local utilizes local binding information table to be redirected the grouping of mailing to mobile node after bind successfully, directly passes through the MAP forwarding from the grouping that mobile node sends.
Described method, wherein, described step d) also comprises
D1) described new couple in router returns the switching bulletin that band M indicates to primary access router after receiving MAP binding notice;
D2) after primary access router is received the switching bulletin of band M sign, no longer set up the tunnel from former router to new router of FMIPv6 regulation, and stop to send periodic local Binding Update to MAP, return the FBack that band M indicates to mobile node, notice is the result of binding fast;
D3) mobile node switches to new subnet in the effective time that limits, and sends quick neighbours' bulletin to new couple in router;
D4) after new couple in router is received quick neighbours' bulletin of band M sign, delete the adjacent machine agency of new on-link care-of address, create the grouping that can reach adjacent machine buffer memory, forwarding cache, the former on-link care-of address main frame route that order exists comes into force, and the local Binding Update to MAP sends new on-link care-of address carries out shifting out subnet up to mobile node to this operation cycle property;
D5) described MAP receive with local binding information table in behind all identical local Binding Update of repetition of the source address, on-link care-of address, the regional care-of address that write down, think that mobile node has inserted new subnet, revise the state of on-link care-of address in the local Binding Update information, and return local binding bulletin; If mobile node does not switch to new subnet in the time that limits, the information that the relevant mobile node of buffer memory switches on MAP and the new couple in router will be deleted after the time that limits.
Described method, wherein, described local binding information table is described as: handle the information of safeguarding in addition on the information needed basis at the home agent Binding Update that RFC3775 requires, the binding relationship that comprises each regional care-of address and one or more on-link care-of addresses participates in the on-link care-of address of binding to each:
(1) with a current state of Status Flag bit-identify on-link care-of address, the former on-link care-of address of the current use of state 1 expression mobile node, the new on-link care-of address that may use after state 2 expression mobile nodes switch, MAP only sends the binding refresh requests to the on-link care-of address of state 1;
(2) send the couple in router that on-link care-of address is bound with local binding agent couple in router record.
Described method wherein, the handover trigger message of described FMIPv6, is switched advertisement message, FBack message, fast in neighbours' advertisement message, is defined that a certain position is the M position in the remaining reservation flag position.
Described method, wherein, described reservation flag position minimum for being made as the M position.
Fast switching method in a kind of MAP territory that is used for HMIPv6 provided by the present invention has adopted the method for HMIPv6 in conjunction with FMIPv6, to improve switch speed and the quality that mobile node moves in a MAP territory; The inventive method has made full use of the local Binding Update of couple in router proxy mobile node, has reduced the expense of the mobile management of mobile node under HMIPv6 mechanism; And made full use of MAP and be redirected the grouping of mailing to mobile node, eliminated the time delay and the bandwidth consumption that bring in multiple tunnel, thus, the inventive method has improved mobile switch speed and the quality of mobile node in a MAP territory.
Description of drawings
Fig. 1 is the application scenarios schematic diagram of the inventive method;
Fig. 2 is the basic messae flow process figure that the mobile node of the inventive method switches in the MAP territory of HMIPv6 fast;
Fig. 3 is the HI message format schematic diagram of the inventive method;
Fig. 4 is the HAck message format schematic diagram of the inventive method;
Fig. 5 is the Fback message format schematic diagram of the inventive method;
Fig. 6 is the FNA message format schematic diagram of the inventive method;
Fig. 7 is that the MAP of the inventive method goes up local binding information hoist pennants.
Embodiment
Be described in further detail below in conjunction with the basic enforcement of accompanying drawing technical scheme:
The characteristics of the inventive method are that HMIPv6 is used in combination with FMIPv6 to quicken switching, the local Binding Update function of mobile node and MAP are transferred on the couple in router, to reduce the mobile management expense of mobile node.
Fast switching method in the MAP territory that is used for HMIPv6 of the present invention, as shown in Figure 1, when switching between the different sub-network in the MAP territory of mobile node at HMIPv6, according to HMIPv6, mobile node only need be constructed new LCoA and be carried out local Binding Update to MAP.Mobile node at first utilized RtSolPr/PrRtAdv to confirm to switch before switching generation and will occur in the MAP territory, construct new LCoA, primary access router sends HI to all possible new couple in router then, new couple in router is upchecked behind the new LCoA, send the local Binding Update of new LCoA immediately to MAP, the MAP buffer memory local binding information, comprise user mode RCoA and bindings one or more LCoA and LCoA, the former LCoA of the current use of state 1 expression mobile node, the new LCoA that may use after state 2 expression mobile nodes switch.After MAP binds successfully in this locality, utilize local binding form to be redirected the packet that mails to mobile node according to certain strategy, the transmitting-receiving bag of mobile node no longer needs the tunnel between process primary access router and new couple in router.New couple in router returns HAck to primary access router.If switching, mobile node inserts the new subnet of prediction within the effective time of Binding Update regulation, mobile node sends FNA and notifies switching to finish to new router, new couple in router sends to mobile node with the grouping of buffer memory, and will substitute mobile node and periodically send local Binding Update to MAP, MAP will correspondingly upgrade the local binding information of buffer memory.Otherwise this locality binding on the new router on the LCoA of buffer memory, grouping and the MAP will be timed deletion.
Concrete job step of the present invention is illustrated in figure 2 as:
Step 2, after primary access router is received the RtSolPr1 request of mobile node, former WAP (wireless access point) link layer address that carries according to RtSolPr and new WAP (wireless access point) link layer address, inquire about the neighbours' radio link layer and the IP layer address information of local cache, obtain link layer address, IP address and the subnet prefix of the new couple in router of new WAP (wireless access point) correspondence.The mobile node of constructing message PrRtAdv2 at last and sending to primary access router is handled.
Step 4, after primary access router is received FBU3, the new LCoA that carries according to FBU3, the MAP domain information of neighbours' couple in router of inquiry local cache, judge that new couple in router and primary access router belong to same MAP territory, handle so construct HI (M) 4 and send to new couple in router, as shown in Figure 3.If new couple in router exists and belongs to a MAP territory with primary access router, primary access router sends the HI message of band M sign to new couple in router, mobile node link address, former LCoA, new LCoA address except comprising that FMIPv6 stipulates in the HI message, the RCoA that also comprises mobile node, this is searching conveniently when carrying out local binding in the back for MAP.Otherwise follow-up all processes will be by the carrying out of FMIPv6 regulation.
For this reason, need to improve the HI message of FMIPv6.Whether a certain position is the M position in remaining 14 the reservation flag positions of definition HI, and for example defining lowest order is the M position, occur in the same MAP territory with moving of M bit-identify mobile node, and message format as shown in Figure 3.Owing to defined the IP address option form among the HMIPv6, so need only contents processing being the IP address option (sub-Type of IP address option equals 0) of RCoA, the transmission of HI message and receiving terminal get final product, need not define new choice format.
Step 5, after new couple in router is received the HI (M) 4 of band M sign, the processing of mainly finishing is to check the validity of carrying new LCoA among the HI (M), and adjacent machine is acted on behalf of new LcoA in the time of appointment: if new LCoA is effective, perhaps new LCoA is invalid but can distribute another new LCoA, then creates the adjacent machine bulletin of the agency of new LCoA clauses and subclauses; If new LCoA is invalid and new router is distributed new LCoA failure, the former LCoA and the mobile node link address that then utilize HI (M) to carry, new router is created a main frame route entry to former LCoA.The mobile node RCoA that utilizes HI (M) to carry at last, structure message LBU5, wherein specifying new LCoA is Care-of Address, RCoA is a home address, and sends to MAP and handle.
Step 6, new couple in router sends local Binding Update to MAP, after MAP receives LBU5, carries out local Binding Update, and safeguards local binding information table, as shown in Figure 7, is set to 0 with the state of the new LCoA of RCoA binding.Construct LBA6 at last and send to new couple in router and handle.If new LCoA checks or is allocated successfully, in the local Binding Update message, new LCoA is placed alternative Care-of Address mobile option (Alternate Care-of Address Mobility Option), and RCoA places home address option (Home Address Option); Otherwise, former LCoA is placed alternative Care-of Address mobile option (Alternate Care-of Address Mobility Option), new RCoA places home address option (Home Address Option).
Step 7 after new couple in router is received LBA6, is carried out the processing relevant with local Binding Update, and the HAck (M) 7 that indicates of structural belt M then as shown in Figure 5, and sends to primary access router and handles.MAP writes down the couple in router address that sends local Binding Update after receiving local Binding Update, and RCoA and LCoA are bound, and a RCoA can bind two or more Different L CoA simultaneously.MAP safeguards these information in local binding information table.
Description to local binding information table: be to handle the information of safeguarding in addition on the information needed basis, comprise the binding relationship of each RCoA and one or more LCoA, each is participated in the LCoA of binding at the home agent Binding Update that RFC3775 requires:
(1) with a current state of Status Flag bit-identify LCoA, the former LCoA of the current use of state 1 expression mobile node, the new LCoA that may use after state 2 expression mobile nodes switch, MAP only sends binding refresh requests (Binding Refresh Request) to the LCoA of state 1.
(2) send the couple in router that LCoA binds with local binding agent couple in router record.
This locality tie up order information table form as shown in Figure 7.
Step 8, MAP returns the binding bulletin to new couple in router.
Step 9 utilizes local binding information table to be redirected the grouping of mailing to mobile node after MAP binds successfully in this locality.Directly transmit from the grouping that mobile node sends, so the transmitting-receiving bag of mobile node no longer needs through the tunnel between primary access router and new couple in router through MAP.
Step 10, new couple in router are returned the HAck of band M sign to primary access router after receiving MAP binding notice.
For this reason, need to improve the HAck message of FMIPv6.Whether a certain position in remaining 13 the reservation flag positions of definition HAck is the M position, and for example defining lowest order is the M position, occur in the same MAP territory with moving of M sign mobile node, and message format as shown in Figure 4.
Step 11, after primary access router is received the HAck (M) 7 of band M sign, no longer set up the tunnel from former router to new router of FMIPv6 regulation, and stop to the periodic local Binding Update of MAP transmission to former LCoA, also no longer respond the Binding Update request that MAP sends, return the FBack (M) 8 that band M indicates to mobile node, form is notified the result of binding fast as shown in Figure 4.
For this reason, need to improve the FBack message of FMIPv6.A certain position in remaining 7 the reservation flag positions of definition FBack is the M position, and for example defining lowest order is the M position, whether occurs in the same MAP territory message format such as accompanying drawing 5 with the mobile of M sign mobile node.
After step 12, mobile node receive FBAck (M) 8, in the effective time that limits, switch to new subnet, in case be connected on the subnet of new couple in router, the FNA (M) 9 of structural belt M sign immediately, form as shown in Figure 6, and send to new couple in router and handle.
For this reason, need to improve the FNA message of FMIPv6.Whether a certain position in 16 reservation flag positions of definition HI is the M position, and for example defining lowest order is the M position, occur in the same MAP territory with moving of M sign mobile node, and message format as shown in Figure 6.
After step 13, new couple in router are received the FNA (M) 9 of band M sign, delete the adjacent machine agency of new LCoA, create the grouping that new LCoA can reach adjacent machine buffer memory, forwarding cache, if to former LCoA main frame route existence then make it come into force; Then, beginning is shifted out this subnet to the local Binding Update that MAP periodically sends new LCoA up to mobile node.
Step 14, MAP receive with local binding information table in behind all identical local Binding Update of repetition of the source address, LCoA, the RCoA that write down, think that mobile node has inserted new subnet, revise the state of LCoA in the local Binding Update information, and return local binding bulletin.
In addition, if mobile node does not switch to new subnet in the time that limits, the information that the relevant mobile node of buffer memory switches on MAP and the new couple in router will be deleted after the time that limits.
What the inventive method proposed is a kind of in the HMIPv6 administrative model, mobile node fast switch over method when mobile between different sub-network in same MAP territory, the inventive method and general HMIPv6+FMIPv6 method difference are: the local binding function between the LCoA of mobile node and the RCoA is responsible for finishing by couple in router, like this when the different sub-network internetwork roaming of mobile node in same MAP territory, the switch speed and the quality of mobile node are improved, and have avoided the caused expense of the periodic local Binding Update of mobile node.
Should be understood that above-mentioned description at specific embodiment of the present invention is too concrete, can not therefore be interpreted as the restriction of asking for protection scope to of the present invention, scope of patent protection should be as the criterion with claims.
Claims (8)
1, fast switching method in a kind of MAP territory that is used for HMIPv6 said method comprising the steps of:
When switching between the different sub-network in the MAP territory of mobile node at HMIPv6, mobile node only need be constructed new on-link care-of address and be carried out local Binding Update to MAP:
A) mobile node utilized proxy router solicitation/agent router bulletin to confirm to switch and will occur in the MAP territory before switching generation between primary access router and the new couple in router, constructed new on-link care-of address;
B) primary access router sends handover trigger to all possible new couple in router, new couple in router is upchecked behind the new on-link care-of address, send the local Binding Update of new on-link care-of address immediately to MAP, the local binding information of MAP buffer memory comprises user mode regional care-of address and bindings one or more on-link care-of addresses and on-link care-of address;
C) after MAP this locality was bound successfully, the policy redirection that utilizes local binding form basis to be scheduled to mail to the packet of mobile node, and the transmitting-receiving bag of mobile node no longer needs through the tunnel between primary access router and new couple in router;
D) described new couple in router returns to primary access router and switches bulletin, if switching, mobile node inserts the new subnet of prediction within the effective time of Binding Update regulation, mobile node sends quick neighbours and announces to switch to new router notice and finish, new couple in router sends to mobile node with the grouping of buffer memory, and will substitute mobile node and periodically send local Binding Update to MAP, MAP will correspondingly upgrade the local binding information of buffer memory; Otherwise this locality binding on the new router on the on-link care-of address of buffer memory, grouping and the MAP will be timed deletion.
2, method according to claim 1 is characterized in that, described step a) also comprises
A1) described mobile node receives the trigger message from radio link layer, the link layer address that comprises new WAP (wireless access point) in the trigger message, mobile node sends proxy router solicitation to the primary access router of current connection, asks the couple in router address and the new subnet prefix information of new WAP (wireless access point) correspondence;
A2) after primary access router was received the request of mobile node, the route-map of inquiry new access point correspondence from the neighbor router of local cache and access-in point information returned the agent router bulletin to the mobile node of primary access router;
A3) described mobile node forms new Care-of Address according to the agent router bulletin, sends quick Binding Update to primary access router then.
3, method according to claim 2 is characterized in that, described step b) also comprises
B1) if new couple in router exists and belongs to a MAP territory with primary access router, described primary access router sends the handoff trigger message of band M sign to new couple in router, except the mobile node link address that comprises the FMIPv6 regulation, former on-link care-of address, new on-link care-of address, also comprise the regional care-of address of mobile node in the handoff trigger message;
B2) described new couple in router is received the handover trigger of band M sign, check the validity of new on-link care-of address in the handover trigger, and adjacent machine is acted on behalf of new on-link care-of address in the time of appointment; If on-link care-of address is invalid and new router can not be distributed new on-link care-of address, new router is established to the main frame route of former on-link care-of address;
B3) described new couple in router sends local Binding Update to MAP, if new on-link care-of address inspection or be allocated successfully, in the local Binding Update message, new on-link care-of address is placed alternative Care-of Address mobile option, regional care-of address places the home address option; Otherwise, former on-link care-of address is placed alternative Care-of Address mobile option, the new region Care-of Address places the home address option;
B4) described MAP writes down the couple in router address that sends local Binding Update after receiving local Binding Update, and regional care-of address and on-link care-of address are bound, and described MAP safeguards these information in local binding information table;
B5) described MAP returns the binding bulletin to new couple in router.
4, method according to claim 3 is characterized in that, described step c) also comprises
C1) described MAP is local utilizes local binding information table to be redirected the grouping of mailing to mobile node after bind successfully, directly passes through the MAP forwarding from the grouping that mobile node sends.
5, method according to claim 4 is characterized in that, described step d) also comprises
D1) described new couple in router returns the switching bulletin that band M indicates to primary access router after receiving MAP binding notice;
D2) after primary access router is received the switching bulletin of band M sign, no longer set up the tunnel from former router to new router of FMIPv6 regulation, and stop to send periodic local Binding Update to MAP, return the FBack that band M indicates to mobile node, notice is the result of binding fast;
D3) mobile node switches to new subnet in the effective time that limits, and sends quick neighbours' bulletin to new couple in router;
D4) after new couple in router is received quick neighbours' bulletin of band M sign, delete the adjacent machine agency of new on-link care-of address, create the grouping that can reach adjacent machine buffer memory, forwarding cache, the former on-link care-of address main frame route that order exists comes into force, and the local Binding Update to MAP sends new on-link care-of address carries out shifting out subnet up to mobile node to this operation cycle property;
D5) described MAP receive with local binding information table in behind all identical local Binding Update of repetition of the source address, on-link care-of address, the regional care-of address that write down, think that mobile node has inserted new subnet, revise the state of on-link care-of address in the local Binding Update information, and return local binding bulletin; If mobile node does not switch to new subnet in the time that limits, the information that the relevant mobile node of buffer memory switches on MAP and the new couple in router will be deleted after the time that limits.
6, method according to claim 3, it is characterized in that, described local binding information table is described as: handle the information of safeguarding in addition on the information needed basis at the home agent Binding Update that RFC3775 requires, the binding relationship that comprises each regional care-of address and one or more on-link care-of addresses participates in the on-link care-of address of binding to each:
(1) with a current state of Status Flag bit-identify on-link care-of address, the former on-link care-of address of the current use of state 1 expression mobile node, the new on-link care-of address that may use after state 2 expression mobile nodes switch, MAP only sends the binding refresh requests to the on-link care-of address of state 1;
(2) send the couple in router that on-link care-of address is bound with local binding agent couple in router record.
7, according to any described method of claim of claim 1～6, it is characterized in that, the handover trigger message of described FMIPv6, switch advertisement message, FBack message, fast in neighbours' advertisement message, define that a certain position is the M position in the remaining reservation flag position.
8, method according to claim 7 is characterized in that, described reservation flag position minimum for being made as the M position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100525167A CN100512525C (en) | 2004-11-29 | 2004-11-29 | Fast switching method in MAP field of HMIPv6 |
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| CNB2004100525167A CN100512525C (en) | 2004-11-29 | 2004-11-29 | Fast switching method in MAP field of HMIPv6 |
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| CN1784059A true CN1784059A (en) | 2006-06-07 |
| CN100512525C CN100512525C (en) | 2009-07-08 |
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