CN101516081B - Network prefix change method, system and device - Google Patents
Network prefix change method, system and device Download PDFInfo
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Abstract
The embodiment of the invention provides a network prefix change method, system and device. Wherein, one method includes steps of receiving network prefix change event, generating network prefix change request according to the network prefix change event, wherein the network prefix change request carries network prefix change information; and sending the network prefix change request to a mobile access network to make the mobile access network carry out network prefix change treatment according to the network prefix change information. Another method includes steps of receiving network prefix change request sent by a local mobile anchor point; obtaining network prefix change request in the network prefix change information; sending network prefix change notification to change object according to the network prefix change information and notifying the change object to carry out network prefix change. By applying the invention, network prefix can be redistributed for MN, and the MN with a plurality of interfaces can be exchanged at the adhered interface.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of network prefix change method, system and device.
Background technology
Mobile IP (IP, Internet Protocol) technology is a kind of network layer scheme that locomotive function is provided on the Internet (Internet), makes node not interrupt ongoing communication when handoff links.Particularly mobile IP provides a kind of IP routing mechanism, and mobile node can be connected on any link with an IP address.
Act on behalf of mobile network's interconnection agreement version 6 (PMIPv6, Proxy Mobile Internet ProtocolVersion 6) provides based on network local mobile management (NETLMM, Network-basedlocalized Mobility Management) function, local mobile anchor (LMA, Local MobilityAnchor) and Mobile Access Gateway (MAG, Mobile Access Gateway) be the core network element in the PMIPv6 territory.
LMA keeps mobile node (MN in the PMIPv6 territory, Mobile Node) router of accessibility communicates by PMIPv6 agreement and MAG, realizes the mobile management to MN in the PMIPv6 territory, when MN is mobile in the PMIPv6 territory, its transfer of data route with LMA as anchor point.MAG communicates by letter with LMA by the PMIPv6 agreement as first hop router of MN in the PMIPv6 territory, realizes the mobile management to MN.Be deployed in LMA in the backbone network and keeping the route binding information of mobile node, this route is pointed to the MAG that mobile node inserts at present, mails to and transmits from the bidirectional tunnel that the packet of MN all passes through between LMA and MAG.When MN was mobile between different MAG, MAG sent binding update messages to LMA.
After MN networks, MAG obtains MN sign (ID, Identification) and behind the strategy file, obtaining LMA from LMA is the home network prefix (HNP that this MN distributed, Home NetworkPrefix), MAG broadcasts this network prefix simulation home network, and this moment, LMA just can transmit to MN after the MAG mailing to the MAG of the data forwarding of MN home address to correspondence.
In research and practice process to prior art, the inventor finds that there is following problem in prior art:
In network prefix when change, just send PBU message after the interface that MAG detects MN adheres to, and LMA just may distribute old interface network prefix for new interface, thereby finishes the network prefix transition process between interface, so prior art can't be finished to have adhered between interface and switches.
Further, under some scene, under the situations such as for example institutional framework or network topology change, network re-mapping, the network prefix that needs change to distribute, and prior art does not provide solution.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides a kind of network prefix change method, system and device, for MN redistributes network prefix, and the MN with many interfaces can be switched adhering between interface.
The embodiment of the invention provides a kind of network prefix change method on the one hand, comprising:
Receive the network prefix altering event, generate network prefix change request according to described network prefix altering event, described network prefix change request carries the network prefix modification information;
Send described network prefix change request to Mobile Access Gateway, handle so that described Mobile Access Gateway carries out the network prefix change according to described network prefix modification information.
On the other hand, provide a kind of network prefix change method, having comprised:
Receive the network prefix change request that local mobile anchor sends;
From described network prefix change request, obtain the network prefix modification information;
Send the network prefix Notification of Changes according to described network prefix modification information to the change object, notify described change object to carry out the network prefix change.
On the other hand, provide a kind of network prefix altering system, having comprised:
Local mobile anchor is used to receive the network prefix altering event, generates network prefix change request according to described network prefix altering event, and described network prefix change request carries the network prefix modification information; Send described network prefix change request;
Mobile Access Gateway is used to receive the network prefix change request that described local mobile anchor sends; From described network prefix change request, obtain the network prefix modification information; Carry out the network prefix change according to described network prefix modification information and handle, send the network prefix Notification of Changes, notify described change object to carry out the network prefix change to the change object.
On the other hand, provide a kind of local mobile anchor, comprised
The incident receiving element is used to receive the network prefix altering event;
Generation unit is used for when described incident receiving element receives the network prefix altering event, generates network prefix change request, and described network prefix change request carries the network prefix modification information;
First transmitting element is used for sending the network prefix change request that described generation unit generates to Mobile Access Gateway, handles so that described Mobile Access Gateway carries out the network prefix change according to described network prefix modification information.
On the other hand, provide a kind of Mobile Access Gateway, having comprised:
First receiving element is used to receive the network prefix change request that local mobile anchor sends;
Acquiring unit is used for obtaining the network prefix modification information from the network prefix change request that described first receiving element is received;
Processing unit, the network prefix modification information that is used for obtaining according to described acquiring unit sends the network prefix Notification of Changes to the change object, notifies described change object to carry out the network prefix change.
As can be seen from the above technical solutions, owing to receive the network prefix altering event by LMA, generate network prefix change request, come trigger network prefix change flow process, when between interface, switching, do not need the interface of MN to adhere in advance and trigger handoff procedure, can realize having adhered to the switching between interface, satisfied user's needs.
And receive the network prefix altering event by LMA, generate network prefix change request, carry the network prefix modification information by network prefix change request, send to MAG, finish network prefix change flow process by MAG, make PMIPv6 when carrying out network address change, during as the network re-mapping, change the network prefix of having distributed.
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.
The Signalling exchange flow chart of the network prefix change method embodiment one that Fig. 1 provides for the embodiment of the invention;
The Signalling exchange flow chart of the network prefix change method embodiment two that Fig. 2 provides for the embodiment of the invention;
The Signalling exchange flow chart of the network prefix change method embodiment three that Fig. 3 provides for the embodiment of the invention;
The Signalling exchange flow chart of the network prefix change method embodiment four that Fig. 4 provides for the embodiment of the invention;
The Signalling exchange flow chart of the network prefix change method embodiment five that Fig. 5 provides for the embodiment of the invention;
Network prefix altering system embodiment one structure chart that Fig. 6 provides for the embodiment of the invention;
Network prefix altering system embodiment two structure charts that Fig. 7 provides for the embodiment of the invention;
The local mobile anchor structure chart that Fig. 8 provides for the embodiment of the invention;
The Mobile Access Gateway structure chart that Fig. 9 provides for 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.
The embodiment of the invention provides a kind of network prefix change method, system and device, can redistribute network prefix for MN, and the MN with many interfaces can be switched adhering between interface.
The network prefix change method of describing the embodiment of the invention and providing from the angle of LMA comprises:
Receive the network prefix altering event, generate network prefix change request according to described network prefix altering event, described network prefix change request carries the network prefix modification information;
Send described network prefix change request to Mobile Access Gateway, handle so that described Mobile Access Gateway carries out the network prefix change according to described network prefix modification information.
The network prefix change method of describing the embodiment of the invention and providing from the angle of MAG comprises:
Receive the network prefix change request that local mobile anchor sends;
From described network prefix change request, obtain the network prefix modification information;
Carry out the network prefix change according to described network prefix modification information and handle, send the network prefix Notification of Changes to the change object.
Because in the network prefix change method that the embodiment of the invention provides, receive the network prefix altering event by LMA, generate network prefix change request, come trigger network prefix change flow process, when between interface, switching, do not need the interface of MN to adhere in advance and trigger handoff procedure, can realize having adhered to the switching between interface, satisfied user's needs.
And receive the network prefix altering event by LMA, generate network prefix change request, carry the network prefix modification information by network prefix change request, send to MAG, finish network prefix change flow process by MAG, make PMIPv6 when carrying out network address change, during as the network re-mapping, change the network prefix of having distributed.
Wherein, the network prefix altering event of LMA reception comprises: network prefix is cancelled incident, network prefix is replaced incident, network prefix increase incident.The reason that causes these incidents may be: switching between network re-mapping, mobile node interface, mobile node network prefix change (increase, delete, replace) etc.
Wherein, common network re-mapping scene includes but not limited to following several:
One, institutional framework or network topology change as company's merger, department's fractionation etc., proposes network re-mapping demand;
Two, address replication problem, cross-domain inter communication may cause the conflict of implicit IP address;
Three, ISP (ISP, Internet Service Provider) change causes network to need re-mapping, the IP address range difference that different I SP managed increases or replacing Internet service provider need carry out re-mapping to existing network;
Four, the network user causes network to need re-mapping to the demand of capacity, as enlarging or dwindling institute addresses distributed space;
Five, carry out the switching of network addressing according to user preference, provide service as different period different I SP;
Six, IPv4 needs the network re-mapping to the migration of IPv6.
LMA can comprise one or more in the following network prefix modification information in the network prefix change message that MAG sends:
1. change object;
2. change type;
3. network prefix.
When the network prefix modification information has only change type, be defaulted as all prefixes of each MN under the MAG management are carried out the default prefix change, for example cancel the overall network prefix.
When the network prefix modification information has only the change object, be defaulted as all-network prefix to the change object, carry out the default prefix change, for example cancel the all-network prefix of this change object.
When the network prefix modification information had only network prefix, processing mode had following several:
If MAG can determine relevant mobile node according to network prefix, and does not comprise new network prefix, acquiescence is cancelled;
If MAG can determine relevant mobile node according to network prefix, and comprises new network prefix, acquiescence is replaced;
If MAG can't determine relevant mobile node according to network prefix, acquiescence does not process.
When the network prefix modification information has only change type, network prefix,, carry out alter operation if MAG can determine relevant mobile node according to network prefix; Otherwise do not process.
When the network prefix modification information had only change object, network prefix, processing mode had following several:
If only comprise old network prefix, acquiescence is cancelled network prefix;
If only comprise new network prefix, acquiescence increases network prefix;
If not only comprise old network prefix but also comprise new network prefix, acquiescence is replaced network prefix.
When the network prefix modification information comprised change object, change type, network prefix, MAG can directly carry out the change of corresponding network prefix according to the indication of network prefix modification information to the change object.
The scheme of more than enumerating is a kind of implementation, can adopt other form to handle as required in actual the use.
Further, the change object can return the change response to MAG after receiving the network prefix Notification of Changes; MAG is according to the difference of change type, can wait for that the change response that the change object returns carries out subsequent action again, also can directly carry out subsequent action; For example, when the network re-mapping, just do not need to wait for; Adhering to interface network prefix when migration, just can wait for the change response that the change object returns, determine that network prefix changes to finish, carry out subsequent action again.
Further, MAG can also return the change response to LMA after receiving network prefix change request, and MAG can be divided into two kinds to the change response that LMA returns:
One, loopback is confirmed in request: the affirmation after being used to change request message and receiving, network prefix change request has been received in this response expression, can be after receiving network prefix change request, return to MAG at once, during as the network re-mapping, receive that can return request immediately after change is asked receives response message.
Two, change loopback as a result: the result is changed in loopback after being used to receive request message, and this response can send after receiving change object change request response.
In embodiments of the present invention, the change target is generally MN, when describing embodiment, will be that example is described with MN.
The network prefix change method embodiment one that the embodiment of the invention provides cancels Event triggered network prefix change flow process by network prefix, carries change object, change type, network prefix in the network prefix change request.
Work as the change of LMA upstream router network prefix among the PMIPv6 or need to cancel the network prefix of some mobile node for some reason, initiate network prefix change flow process by LMA, MAG carries out respective handling simultaneously to LMA transmission network prefix change acknowledge message.
The Signalling exchange flow chart of the network prefix change method embodiment one that Fig. 1 provides for the embodiment of the invention:
101, LMA receives network prefix and cancels Event triggered, initiates network prefix change flow process;
LMA upstream router network prefix change or when needing for some reason to cancel the network prefix of some mobile node, LMA can receive that the signaling of upstream router indicates some network prefixs to lose efficacy, be that LMA receives that network prefix cancels incident, generate network prefix change request according to the network prefix altering event, trigger network prefix change flow process.
102, LMA sends network prefix change request to target MAG, carries the change object information;
LMA generates and sends network prefix change request to MAG, and the network prefix modification information that this network prefix change request is carried comprises change type, network prefix, change object information; Wherein change type is that network prefix is cancelled, and the change object information is a target MN information, target MN identifier for example, and network prefix is the old network prefix information of cancelling.
103, MAG sends the network prefix Notification of Changes to change target MN, this network prefix Notification of Changes can be router advertisement message (Router Advertisement, RA);
After MAG receives the network prefix change request message of LMA, send RA message according to target MN identifier and cancel incident to the relevant MN network prefix of change target MN announcement, after target MN receives the network prefix Notification of Changes, can whether carry out the network prefix change according to change type, network prefix decision, if, then carry out the network prefix change, in the present embodiment for cancelling the old network prefix of appointment according to change type, network prefix.
104, MAG sends network prefix change response message to LMA, and notice LMA network prefix change request is received;
After LMA receives network prefix change response, stop to retransmit network prefix change request; Because the influence of Network Transmission environment, the network prefix change request that might LMA sends is lost in transport process, in order to prevent that MAG from can not receive network prefix change request, LAM can retransmit network prefix change request after a period of time does not arrive network prefix change response.
Because the network prefix change method embodiment one that inventive embodiments provides, carry the change object information in the network prefix change request, change type is that network prefix is cancelled, MAG sends network prefix change response message to LMA, be in order to notify LMA network prefix change request to receive, can stop to retransmit network prefix change request, therefore MAG does not need to wait for the response of MN, can after receiving network prefix change request, directly return network prefix change response message, so not have ordinal relation between step 103 and the step 104 to LMA.
The network prefix change method embodiment two that the embodiment of the invention provides cancels Event triggered network prefix change flow process by network prefix, does not carry the change object in the network prefix change request.
Work as the change of LMA upstream router network prefix among the PMIPv6 or need to cancel the network prefix of some mobile node for some reason, initiatively initiate network prefix change flow process by LMA, MAG carries out respective handling and sends network prefix change acknowledge message to LMA simultaneously.
The Signalling exchange flow chart of the network prefix change method embodiment two that Fig. 2 provides for the embodiment of the invention:
201, LMA receives network prefix and cancels Event triggered, initiates network prefix change flow process;
LMA upstream router network prefix change or when needing for some reason to cancel the network prefix of some mobile node, LMA receives that network prefix cancels incident, generate network prefix change request according to the network prefix altering event, trigger network prefix change flow process.
202, LMA sends network prefix change request to target MAG, does not comprise the change object information in this network prefix change request;
LMA generates and sends network prefix change request to MAG, the network prefix modification information that this network prefix change request is carried comprises change type, this change type is that network prefix is cancelled, and carries network prefix, and this network prefix is for being cancelled old network prefix information; If preserve network prefix among the MAG and have mapping between the object of this prefix, then MAG can judge prefix change object according to old network prefix, obtains the information of change target MN.
203, MAG sends the network prefix Notification of Changes to change target MN, this network prefix Notification of Changes can be router advertisement message (Router Advertisement, RA);
After MAG receives the network prefix change request message of LMA, judged network prefix subclass or the all-network prefix that to cancel by cancelling old network prefix information, send RA message and cancel incident to the relevant MN network prefix of MN announcement that has these network prefixs.
204, MAG sends network prefix change response message to LMA, and notice LMA network prefix change request is received;
After LMA receives network prefix change response, stop to retransmit network prefix change request.
Wherein, step 203 and 204 does not have ordinal relation, and MAG can send response message immediately after receiving request message.
The network prefix change method embodiment three that the embodiment of the invention provides, replace Event triggered network prefix change flow process by network prefix, work as the change of LMA upstream router network prefix among the PMIPv6 or need to replace network prefix for some reason, all initiatively initiate network prefix change flow process by LMA, MAG sends network prefix change acknowledge message to LMA after finishing respective handling.
The Signalling exchange flow chart of the network prefix change method embodiment three that Fig. 3 provides for the embodiment of the invention:
301, LMA receives network prefix and replaces Event triggered, initiates network prefix change flow process;
LMA upstream router network prefix change or when needing to replace network prefix for some reason, LMA generates network prefix change request according to the network prefix altering event, trigger network prefix change flow process.
302, LMA sends network prefix change request to target MAG;
LMA generates and sends network prefix change request to MAG, the network prefix modification information that this network prefix change request is carried comprises change type, network prefix and change object information, wherein change type is that network prefix is replaced, and network prefix comprises and is replaced old network prefix information, new network prefix.
303, MAG sends the network prefix Notification of Changes to change target MN, this network prefix Notification of Changes can be router advertisement message (Router Advertisement, RA);
After MAG receives the network prefix change request message of LMA, judge network prefix subclass or the all-network prefix that to cancel by network prefix information, send RA message to the MN that has this new network prefix, indicate old network prefix simultaneously and cancel, new network prefix comes into force.
304, MAG sends network prefix change response message to LMA, and notice LMA network prefix change request is received;
After LMA receives network prefix change response, stop to retransmit network prefix change request.
Wherein, step 303 and 304 does not have ordinal relation, and MAG can send response message immediately after receiving request message.
The network prefix change method embodiment four that the embodiment of the invention provides is applied to MN and carries out interface when switching, and according to actual conditions, may be to replace Event triggered network prefix change flow process by network prefix; Also may be to increase Event triggered network prefix change flow process by network prefix, present embodiment be that example is described with network prefix increase incident.
In the network prefix change method embodiment four that the embodiment of the invention provides, MN has adhered between interface and has switched, MAG under the old interface notice, and MAG switches message trigger network prefix change flow process by sending to LMA, for new interface increases network prefix, finish interface and switch.
With WLAN (wireless local area network) (WLAN, Wireless LAN) and micro-wave access to global intercommunication (WiMAX, Worldwide Interoperability for Microwave Access) be example, mobile node has 2 interfaces, carry out business 1 at WLAN coverage, the WiMAX area of coverage has carried out business 2, and wherein the WiMAX zone comprises the WLAN zone.Then after the user shifts out the WLAN zone, in order to keep professional 1 conversation continuity, need that then business 1 is switched to professional 2 and carry out, just need carry out MN this moment and adhere to switching between interface.
MN has interface 1 and interface 2, can be different access styles, also can be 2 interfaces of identical access style, respectively corresponding MAG1 and MAG2, and MAG1 and MAG2 are under same LMA management; If initial 2 interfaces distribution network prefix are HNP1 and HNP2, HNP1 is professional 1 use, and HNP12 is professional 2 uses, and the up-downgoing data flow of two business transfers to LMA through MAG1 and MAG2 respectively.
The Signalling exchange flow chart of the network prefix change method embodiment four that Fig. 4 provides for the embodiment of the invention:
501, the interface 1 of MN is to MAG1 transmission interface handoff request message;
The interface 1 of MN can be by two layers of signaling to MAG1 transmission interface handoff request message.
502, MAG1 sends the network prefix migration request to LMA;
After MAG1 receives interface handoff request message, send the network prefix migration request message to LMA, indication need be carried out interface and switch, carry in the network prefix migration request message and switch 2 relevant interface identifier, in the present embodiment, will be with the interface identifier IF1 of interface 1, the interface identifier IF2 of interface 2 is that example is described; LMA receives the network prefix migration request that MAG1 sends, and is considered as receiving the network prefix altering event, generates network prefix change request according to the network prefix altering event, trigger network prefix change flow process.
503, LMA sends network prefix change request to MAG2;
LMA generates network prefix change request, send network prefix change request to MAG2, the network prefix modification information that this network prefix change request is carried comprises the change object, network prefix, wherein change object information and comprise the MN identifier, interface identifier IF2, network prefix comprises network prefix HNP1 to be migrated, further the network prefix modification information can also comprise change type, indication network prefix change type is that network prefix increases, if do not comprise change type, then MAG2 can utilize the rule of acquiescence to determine how to carry out the network prefix change, for example uses HNP1 to replace HNP2.
504, after MAG2 receives network prefix change request, send the network prefix Notification of Changes to MN, this network prefix Notification of Changes can be a RA message;
This RA message is carried migration network prefix HNP1 and HNP2.
505, whether MN determines the configuration network prefix addresses;
MN does not dispose as MN according to network prefix HNP1 to be migrated configuration address on interface 2, and network prefix is not accepted in expression to be increased; As MN configuration, execution in step 506.
506, if decision configuration network prefix addresses, then the network prefix modification information that carries according to the network prefix Notification of Changes of MN carries out the network prefix change, for example use HNP1 to replace HNP2, and to MAG2 transmission network prefix change response, expression interface 2 is the configuration network prefix, this network prefix change response can be the neighbors request message (Neighbor Solicitation, NSol);
If do not dispose this network prefix, then do not need to send response message.
507, after MAG2 receives the notification message of MN transmission, confirm that MN agrees this network prefix of configuration, send network prefix to LMA and change response message that notice LMA network prefix is moved successfully;
If MAG2 waits for a period of time, do not receive the change response message, network prefix migration failure then is described, send network prefix change response message notice LMA network prefix migration mistake;
After LMA receives the network prefix change response message of MAG2 transmission, according to transition state, whether decision is that the packet of HNP1 is transmitted to MN by MAG2 with the source address of intercepting and capturing, if network prefix change response message indication network prefix is moved successfully, then professional 1 and 2 be forwarded to MN by MAG2 simultaneously, this moment, the interface switching was finished.
Described MN interface 1 trigger network prefix altering event among the network prefix change method embodiment four that the embodiment of the invention provides, if initiated by the interface 2 of MN, except that the interface difference of triggering stage use, other flow processs are all identical, do not repeat them here; And present embodiment also can be used for the interface situation of 2 free time.
The network prefix change method embodiment five that the embodiment of the invention provides, increase incident for initiatively initiate network prefix by network side, because some factor such as state of network traffic, service quality (QoS, Qualityof Service) situation such as demand causes carrying out the switching between interface, network prefix change flow process can be initiated by network side, and promptly LMA is by local policy trigger network prefix change flow process.
The Signalling exchange flow chart of the network prefix change method embodiment five that Fig. 5 provides for the embodiment of the invention:
601, state of network traffic or QoS demand trigger network prefix change.
LMA can know the different QoS requirements of different business, and understands the QoS ability that MN can reach under different access technologies simultaneously, and this moment, LMA can determine whether switch.
LMA finds that situations such as state of network traffic or QoS demand cause carrying out the switching between interface, is considered as receiving the network prefix altering event, generates network prefix change request, the change of trigger network prefix according to the network prefix altering event.
602, LMA sends network prefix change request to MAG2;
LMA sends network prefix change request to MAG2, the network prefix modification information that this network prefix change request is carried comprises: change type, change object and network prefix HNP1, wherein change type is that network prefix increases, and the change object is MN identifier, interface identifier IF2;
603, after MAG2 receives network prefix change request, send the network prefix Notification of Changes to MN, this network prefix Notification of Changes can be a RA message;
This RA message is carried HNP1 and HNP2.
604, whether MN determines the configuration network prefix addresses;
MN does not dispose as MN according to network prefix HNP1 to be migrated configuration address on interface 2, and network prefix is not accepted in expression to be increased.
605, if decision configuration network prefix addresses, then the network prefix modification information that carries according to the network prefix Notification of Changes of MN carries out the network prefix change, for example use HNP1 to replace the current network prefix, and to MAG2 transmission network prefix change response, expression interface 2 is the configuration network prefix, and this network prefix change response can be a NSol message;
If do not dispose this network prefix, then do not need to send a notification message
606, after MAG2 receives the notification message of MN transmission, confirm that MN agrees that configuration changes network prefix, send network prefix to LMA and change response message that notice LMA network prefix is moved successfully;
If MAG2 waits for a period of time, there is not notified message, network prefix migration failure then is described, send network prefix change response message notice LMA network prefix migration mistake;
After LMA receives the network prefix change response message of MAG2 transmission, according to transition state, whether decision is that the packet of HNP1 is transmitted to MN by MAG2 with the source address of intercepting and capturing, if network prefix change response message indication network prefix is moved successfully, then professional 1 and 2 be forwarded to MN by MAG2 simultaneously, this moment, the interface switching was finished.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises the steps: when carrying out
A kind of network prefix change method comprises:
Receive the network prefix altering event, generate network prefix change request according to described network prefix altering event, described network prefix change request carries the network prefix modification information;
Send described network prefix change request to Mobile Access Gateway, handle so that described Mobile Access Gateway carries out the network prefix change according to described network prefix modification information.
A kind of network prefix change method comprises:
Receive the network prefix change request that local mobile anchor sends;
From described network prefix change request, obtain the network prefix modification information;
Send the network prefix Notification of Changes according to described network prefix modification information to the change object, notify described change object to carry out the network prefix change.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
Network prefix altering system embodiment one structure that the embodiment of the invention provides comprises as shown in Figure 6:
Local mobile anchor 701 is used to receive the network prefix altering event, generates network prefix change request according to described network prefix altering event, and described network prefix change request carries the network prefix modification information; Send described network prefix change request;
Wherein, the internal structure of local mobile anchor 701, Mobile Access Gateway 702 can be with reference to the description of the local mobile anchor that hereinafter embodiment of the invention is provided, Mobile Access Gateway.
Because in the network prefix altering system that the embodiment of the invention provides, by LMA trigger network prefix change flow process, when between interface, switching, do not need the interface of MN to adhere in advance and trigger handoff procedure, can realize having adhered to the switching between interface, satisfy user's needs.
And change flow process in predetermined condition trigger network prefix by LMA, use network prefix change request to carry the network prefix modification information, send to MAG, finish network prefix change flow process, make PMIPv6 can when carrying out the network re-mapping, change the method for the network prefix of having distributed by MAG.
In the PMIPv6 system, may have a plurality of LAM, MAG, MN can move in the service range of a plurality of MAG, the system configuration of a plurality of LAM, MAG, MN is now arranged, network prefix altering system embodiment two structure charts that Fig. 7 provides for the embodiment of the invention with the example explanation:
Local mobile anchor 1 management Mobile Access Gateway 1 and Mobile Access Gateway 2, local mobile anchor 2 management Mobile Access Gateway 2 and Mobile Access Gateways 3, mobile node 1 is in the service range of Mobile Access Gateway 1, and mobile node 2, mobile node 3 are in the service range of Mobile Access Gateway 2; Mobile node 1, mobile node 2, mobile node 3 can move in the service range of different Mobile Access Gateways.
The concrete using method of the network prefix altering system that the embodiment of the invention provides can no longer repeat at this with reference to the description of the network prefix change method that above embodiment of the invention is provided.
The local mobile anchor structure that the embodiment of the invention provides comprises as shown in Figure 8:
Incident receiving element 801 is used to receive the network prefix altering event;
Generation unit 802 is used for generating network prefix change request according to described network prefix altering event when described incident receiving element 801 receives the network prefix altering event, and described network prefix change request carries the network prefix modification information;
First transmitting element 803 is used for sending the network prefix change request that described generation unit 802 generates to Mobile Access Gateway, handles so that described Mobile Access Gateway carries out the network prefix change according to described network prefix modification information.
Wherein, described incident receiving element 801 comprises:
The first incident receiving element is used to receive network prefix and cancels incident;
Or the second incident receiving element is used to receive network prefix and replaces incident;
Or, the 3rd incident receiving element, being used to receive network prefix increases incident.
Further, can also comprise:
Retransmission unit is used to receive the network prefix change response that described Mobile Access Gateway returns; Do not receive network prefix change response in the given time, then retransmit the network prefix change request that described generation unit generates; After receiving described network prefix change response, stop to retransmit the network prefix change request that described generation unit generates.
The Mobile Access Gateway structure that the embodiment of the invention provides comprises as shown in Figure 9:
First receiving element 901 is used to receive the network prefix change request that local mobile anchor sends;
Acquiring unit 902 is used for obtaining the network prefix modification information from the network prefix change request that described first receiving element 901 is received;
Processing unit 903 is used for carrying out the network prefix change according to the network prefix modification information that described acquiring unit 902 obtains and handles, and sends the network prefix Notification of Changes to the change object, notifies described change object to carry out the network prefix change.
Comprise at the network prefix modification information: when change type and network prefix;
Processing unit 903 comprises:
First processing unit is used for carrying out alter operation when MAG can determine to be correlated with mobile node according to network prefix; Otherwise do not process.
Comprise at the network prefix modification information: when change object and network prefix;
Processing unit 903 comprises:
Second processing unit is used for when described network prefix only comprises old network prefix, is to cancel the default default type of network prefix with change type, sends the network prefix Notification of Changes to described change object;
Or the 3rd processing unit is used for when described network prefix only comprises new network prefix, and with the change type being increases network prefix, sends the network prefix Notification of Changes to described change object;
Or the manages the unit everywhere, be used for when described network prefix not only comprises old network prefix but also comprises new network prefix, and be to replace network prefix with the change type, send the network prefix Notification of Changes to described change object.
Further, can also comprise:
Second receiving element is used at described processing unit receiving the change response that described change object returns after the change object sends the network prefix Notification of Changes.
Second transmitting element is used for sending network prefix change response message to described local mobile anchor after described first receiving element receives the network prefix change request of local mobile anchor transmission.
The concrete using method of the local mobile anchor that the embodiment of the invention provides, Mobile Access Gateway can no longer repeat at this with reference to the description of the network prefix change method that above embodiment of the invention is provided.
More than a kind of network prefix change method provided by the present invention, system and device are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept 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 network prefix change method is characterized in that, comprising:
Local mobile anchor receives the network prefix altering event, comprise: receive network prefix altering event from upstream router, maybe when finding that state of network traffic or QoS requirement cause carrying out switching between interface, be considered as receiving the network prefix altering event, generate network prefix change request according to described network prefix altering event, described network prefix change request carries the network prefix modification information;
Send described network prefix change request to Mobile Access Gateway, handle so that described Mobile Access Gateway carries out the network prefix change according to described network prefix modification information.
2. network prefix change method as claimed in claim 1 is characterized in that, described network prefix altering event comprises: network prefix is cancelled incident, network prefix is replaced wherein one or multinomial of incident, network prefix increase incident.
3. network prefix change method as claimed in claim 1 or 2 is characterized in that, described network prefix modification information comprises: wherein one or multinomial of change type, change object, network prefix.
4. network prefix change method as claimed in claim 3 is characterized in that, also comprises:
Receive the network prefix change response that described Mobile Access Gateway returns;
Do not receive network prefix change response in the given time, then retransmit described network prefix change request;
After receiving described network prefix change response, stop to retransmit described network prefix change request.
5. a network prefix change method is characterized in that, comprising:
Receive its network prefix change request that generates according to the network prefix altering event that receives that local mobile anchor sends, wherein, local mobile anchor receives the network prefix altering event and comprises: receive the network prefix altering event from upstream router, maybe when finding that state of network traffic or QoS requirement cause carrying out switching between interface, be considered as receiving the network prefix altering event;
From described network prefix change request, obtain the network prefix modification information;
Send the network prefix Notification of Changes according to described network prefix modification information to the change object, notify described change object to carry out the network prefix change.
6. network prefix change method as claimed in claim 5 is characterized in that, described network prefix modification information comprises: change object and network prefix;
Describedly carry out network prefix change according to described network prefix modification information and handle, send the network prefix Notification of Changes, comprising to the change object:
When described network prefix only comprises old network prefix, be to cancel the default default type of network prefix with change type, send the network prefix Notification of Changes to described change object;
Or, when described network prefix only comprises new network prefix, be to increase network prefix with the change type, send the network prefix Notification of Changes to described change object;
Or, when described network prefix not only comprises old network prefix but also comprises new network prefix, be to replace network prefix with the change type, send the network prefix Notification of Changes to described change object.
7. as claim 5 or 6 described network prefix change methods, it is characterized in that, also comprise:
After the network prefix change request that receives the local mobile anchor transmission, send network prefix change response message to described local mobile anchor.
8. as claim 5 or 6 described network prefix change methods, it is characterized in that, before described method, also comprise:
Receive the interface handoff request message that described change object sends, send the network prefix migration request to described local mobile anchor.
9. a network prefix altering system is characterized in that, comprising:
Local mobile anchor, be used to receive the network prefix altering event, comprise: receive network prefix altering event from upstream router, maybe when finding that state of network traffic or QoS requirement cause carrying out switching between interface, be considered as receiving the network prefix altering event, generate network prefix change request according to described network prefix altering event, described network prefix change request carries the network prefix modification information; Send described network prefix change request;
Mobile Access Gateway is used to receive the network prefix change request that described local mobile anchor sends; From described network prefix change request, obtain the network prefix modification information; Carry out the network prefix change according to described network prefix modification information and handle, send the network prefix Notification of Changes, notify described change object to carry out the network prefix change to the change object.
10. a local mobile anchor is characterized in that, comprises
The incident receiving element, be used to receive the network prefix altering event, comprise: receive network prefix altering event, maybe when discovery state of network traffic or QoS requirement cause carrying out switching between interface, be considered as receiving the network prefix altering event from upstream router;
Generation unit is used for when described incident receiving element receives the network prefix altering event, generates network prefix change request, and described network prefix change request carries the network prefix modification information;
First transmitting element is used for sending the network prefix change request that described generation unit generates to Mobile Access Gateway, handles so that described Mobile Access Gateway carries out the network prefix change according to described network prefix modification information.
11. local mobile anchor as claimed in claim 10 is characterized in that, described incident receiving element comprises:
The first incident receiving element is used to receive network prefix and cancels incident;
Or the second incident receiving element is used to receive network prefix and replaces incident;
Or, the 3rd incident receiving element, being used to receive network prefix increases incident.
12. as claim 10 or 11 described local mobile anchors, it is characterized in that, also comprise:
Retransmission unit is used to receive the network prefix change response that described Mobile Access Gateway returns; Do not receive network prefix change response in the given time, then retransmit the network prefix change request that described generation unit generates; After receiving described network prefix change response, stop to retransmit the network prefix change request that described generation unit generates.
13. a Mobile Access Gateway is characterized in that, comprising:
First receiving element, be used to receive its network prefix change request that generates according to the network prefix altering event that receives that local mobile anchor sends, wherein, local mobile anchor receives the network prefix altering event and comprises: receive the network prefix altering event from upstream router, maybe when finding that state of network traffic or QoS requirement cause carrying out switching between interface, be considered as receiving the network prefix altering event;
Acquiring unit is used for obtaining the network prefix modification information from the network prefix change request that described first receiving element is received;
Processing unit, the network prefix modification information that is used for obtaining according to described acquiring unit sends the network prefix Notification of Changes to the change object, notifies described change object to carry out the network prefix change.
14. Mobile Access Gateway as claimed in claim 13 is characterized in that, described network prefix modification information comprises: change object and network prefix;
Described processing unit comprises:
Second processing unit is used for when described network prefix only comprises old network prefix, is to cancel the default default type of network prefix with change type, sends the network prefix Notification of Changes to described change object;
Or the 3rd processing unit is used for when described network prefix only comprises new network prefix, and with the change type being increases network prefix, sends the network prefix Notification of Changes to described change object;
Or the manages the unit everywhere, be used for when described network prefix not only comprises old network prefix but also comprises new network prefix, and be to replace network prefix with the change type, send the network prefix Notification of Changes to described change object.
15. as claim 13 or 14 described Mobile Access Gateways, it is characterized in that, also comprise:
Second transmitting element is used for sending network prefix change response message to described local mobile anchor after described first receiving element receives the network prefix change request of local mobile anchor transmission.
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| US20070268919A1 (en) * | 2006-05-19 | 2007-11-22 | Futurewei Technologies, Inc. | Using DHCPv6 and AAA for Mobile Station Prefix Delegation and Enhanced Neighbor Discovery |
| CN101321384A (en) * | 2007-06-08 | 2008-12-10 | 华为技术有限公司 | Triggering routing optimization method, device and proxy mobile IP system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070268919A1 (en) * | 2006-05-19 | 2007-11-22 | Futurewei Technologies, Inc. | Using DHCPv6 and AAA for Mobile Station Prefix Delegation and Enhanced Neighbor Discovery |
| CN101321384A (en) * | 2007-06-08 | 2008-12-10 | 华为技术有限公司 | Triggering routing optimization method, device and proxy mobile IP system |
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