CN104486750B - A kind of network global mobility communication means - Google Patents
A kind of network global mobility communication means Download PDFInfo
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- CN104486750B CN104486750B CN201410705792.2A CN201410705792A CN104486750B CN 104486750 B CN104486750 B CN 104486750B CN 201410705792 A CN201410705792 A CN 201410705792A CN 104486750 B CN104486750 B CN 104486750B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/12—Mobility data transfer between location registers or mobility servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/255—Maintenance or indexing of mapping tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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Abstract
The invention discloses a kind of network global mobility communication means.The present invention is extended to PMIPv6 and MIPv6, to realize network global mobility support.The home address HoA mentioned in this programme is the fixing address distributed by home agent HA, and Care-of Address CoA is addresses of the MN according to the local mobile anchor LMA home network prefix HNP configurations distributed.Thus, ensure the continuity of upper layer application by realizing identity HoA and address mark CoA mapping on MN and carry out data forwarding.In order to ensure the synchronization between MN and HA for global mobile management, priority parameters are contained in map entry.The present invention not only inherits the advantage based on network mobility management, also realizes the support to various mobility scenes, including：Mobile in the domain of single interface termination to support, mobile between the domain of single interface or multi-interface terminal to support, the Vertical Handover of multi-interface terminal is supported.
Description
Technical field
The present invention relates to a kind of communication means, and in particular to a kind of network global mobility communication means, belongs to
Network communication technology field.
Background technology
In recent years, radio network technique and developing rapidly for application service have started the mobile computing epoch.But in tradition
In mobile radio communication, mobile management is carried out in link layer.With to IP-based packet switching network transition, link layer
Mobility can not solve the problems, such as that different IP subnets switchings are brought.Then IETF started network layer mobility agreement research and
Standardization effort.Initially, the network layer mobility agreement that IETF is proposed is all based on client, such as mobile IP v 6 (Mobile
IPv6, MIPv6) and its optimization agreement.It is existing if desired for renewal but the mobility management protocol based on terminal has some drawbacks
There are software, increase terminal complexity and the electric quantity consumption of terminal, a large amount of mobility signalings to take Radio Resource etc..Based on these because
Element considers that IETF has set up NetLMM working groups, proposed network mobility management protocol demand.By discussing it for a long time
Afterwards, proxy mobile IPv 6 (Proxy Mobile IPv6, PMIPv6) standard has formally been issued.
Network mobility management protocol does not need terminal to participate in mobility management process, all mobility signalings
All completed by network, which solves the problem of the functional requirement problem to terminal and waste of radio resources.Unfortunately, it is based on
The mobility protocol of network also determines that it is only applicable to the mobile management of local scope, and this point significantly limit it should
Use scene.
The content of the invention
For technical problem existing for prior art, it is an object of the invention to provide a kind of network global mobile
Property communication means.The present invention is extended to PMIPv6 and MIPv6, to realize network global mobility support.This
The home address (HomeAddress, HoA) mentioned in scheme is distributed regularly by home agent (HomeAgent, HA)
Location, and Care-of Address (Care-ofAddress, CoA) be MN according to local mobile anchor (Local MobilityAnchor,
LMA) the address of home network prefix (Home Network Prefix, the HNP) configuration of distribution.Thus, realization is passed through on MN
Identity (HoA) and the mapping of address mark (CoA) ensure the continuity of upper layer application and carry out data forwarding.In order to protect
Synchronization for global mobile management between MN and HA is demonstrate,proved, priority parameters are contained in map entry.
The technical scheme is that：
A kind of network global mobility communication means, its step are：
1) home agent HA is that mobile node MN distributes a unique and constant home address HoA；Wherein, the local generation
Reason HA controls and the proxy mobile IPv 6 domain for managing multiple signings, each proxy mobile IPv 6 domain is provided with a local mobile anchor
LMA and some Mobile Access Gateway MAG；
2) when the interface i of the mobile node MN detects i-th of mobile anchor point LMAiI-th of Mobile Access Gateway MAGi
When, it is sent to access request message；Home address HoA of the access request message package containing the MN；
3) Mobile Access Gateway MAGiTo mobile anchor point LMAiAgent binding update messages PBU is sent, should wherein including
The MN home address HoA and address HAA of home agent HA；
4) as the LMAiAfter receiving the PBU message, to home agent HA launch position fresh information, wherein carry this
LMAiFor the home network prefix HNP of MN distributioni；
5) home agent HA is according to the HNPiA Care-of Address CoA is established for the interface i of the MNi, and it is saved in the MN's
In HoA and CoA mapping tables；Then to the LMAiHome position updates confirmation message, with the LMAiEstablish bidirectional tunnel；
6) LMAiTo the MAGiPBA message is sent, wherein carry the LMAiFor the home network prefix of MN distribution
HNPi；The MAGiSend access confirmation message and give the MN, bidirectional tunnel is established with the MN；
7) HNPs of the MN in the confirmationiAccording to the method for step 5) Care-of Address CoA is established for interface ii,
And it is saved in HoA and CoA mapping tables；
8) when MN upper layer application sends packet by interface i to a certain node address CN；The MN is by address
(HoA, CN) is mapped as address (CoAi, CN), then pass through the MN and the MAGiBetween bidirectional tunnel send the packet to
The MAGi, the MAGiTo being dealt into LMA after the packet encapsulationi；
9) LMAiThe packet is built into bidirectional tunnel via step 5) and issues home agent HA；Home agent HA is to this
After packet decapsulation, according to the HoA of the MN and CoA mapping tables by address (CoAi, CN) and address (HoA, CN) is mapped as, finally
Packet is sent to address CN；
10) packet of the MN is sent to for address CN, is first routed to home agent HA；Then home agent HA root
Address (CN, HoA) is mapped as address (CN, CoA according to HoA and the CoA mapping table of the MNi) after, built via step 5) two-way
Tunnel sends the packet to the LMAi；The LMAiTo being sent to the MAG after the packet encapsulationi；The MAGiAfter decapsulating
Packet be sent to the MN；Finally the MN reflected according to HoA and the CoA mapping tables of local the packet is submitted to the upper strata should
With.
Further, when mobile node MN is from the MAG being currently accessediWhen exiting, it is sent to exit request message and deletes
Except the CoA of interface i in local HoA and CoA mapping tablesi；This exits the home address HoA that request message includes the MN；The MAGi
Delete the MAG built for interface iiThe bidirectional tunnel between the MN, while to mobile anchor point LMAiAgent binding is sent to delete
Message, wherein the address HAA of home address HoA and home agent HA comprising the MN；As the LMAiReceive binding and delete message
Afterwards, deleted according to the location updating message and built by interface i to home agent HA launch position fresh information, home agent HA
HA and the LMAiBetween in bidirectional tunnel, and HoA and the CoA mapping table of the MN interface i CoAi。
Further, interface i priority is also included in the access request message；The location updating confirmation message
In also include interface i priority.
Further, the HoA and CoA mapping tables include a HoA, and some CoA corresponding with the HoA, every
CoA is provided with a priority.
Further, the mobile node MN includes one or more interfaces, when each interface is linked into movement access
During gateway MAG, home agent HA creates a CoA in HoA and the CoA mapping table of the MN for interface, while the MN is in its local
HoA for the interface in CoA mapping tables with creating a CoA.
Further, when the MN wishes flow being switched to interface j from interface i, the MAG that is connected to interface jjSend
Handover request, wherein containing the reset for interface priority, i.e. MN is more than corresponding interface j priority level initializing
Interface i priority；Then through MAGjWith the LMA where itjInteraction, and LMAjWith interacting for HA, HA updates the MN's
Corresponding interface priority in HoA and CoA mapping tables, then HA choose the higher interface of interface priority and send data.
Further, according to HNPiRear 64 generations Care-of Address CoA of first 64 and HoAi。
Compared with prior art, the positive effect of the present invention is：
The present invention not only inherits the advantage based on network mobility management, also extends its application, to realize to each
The support of kind mobility scene：
A) supported for mobile in the domain of single interface termination；
B) supported for mobile between the domain of single interface or multi-interface terminal；
C) supported for the Vertical Handover of multi-interface terminal.
Brief description of the drawings
Fig. 1 is global mobile management Organization Chart；
Fig. 2 is mapping table structure figure；
Fig. 3 is HA and MN protocol stack schematic diagram；
Fig. 4 is single interface switching flow figure；
Fig. 5 is multiplex roles switching flow figure；
Fig. 6 is data forwarding flow chart.
Embodiment
1 couple of present invention is described in further detail below in conjunction with the accompanying drawings：
The global mobile management framework of the present invention is as shown in Figure 1.
As global mobility management apparatus, HA controls and managed each signing as global mobility management entity
PMIPv6 domains, and realize certification and essential information maintenance for all MN.HA mainly has following function：
1) identity (HoA) is distributed for MN, this HoA is the IP address that MN establishes all upper layer applications, therefore is referred to as
For MN identity；
2) HoA packet is sent to by the guiding of the mechanism such as proxy neighbor advertisements；
3) MN HoA and the actual address CoA of interface mapping relations are established, this makes it possible to will be sent to HoA data
Bag is mapped to correct position, and CoA is the address that MN configures according to the HNP that LMA is distributed in each domain, and it identifies MN
The PMIPv6 domains being currently accessed；
4) priority state of the various granularities of the how individual interfaces of MN is safeguarded, so as to which MN will be sent to according to the actual requirements
Packet be scheduled by the optimum interface selected by MN.
Need to safeguard synchronous mapping table on MN and HA.Its form is as shown in Figure 2.Home address (HoA) therein is MN
Mark, for establishing all upper strata connections.Because this mark is forever constant, it thereby may be ensured that MN in moving process
Business continuance.In a PMIPv6 domain, LMA is the MN unique HNP of some interface assignment, and Care-of Address (CoA) is
The address that the HNP that MN some interface distributes according to LMA is configured, priority (Priority) is the priority of corresponding interface.Such as
Fruit is needed to realize the interface scheduling (e.g., more locals and stream move) of more fine granularity, and extension (Extension) can be set
Put and provide, this patent is not limited this.
The present invention is in order to ensure that the synchronization of HA and MN for CoA information recognizes, and when configuring CoA, the mechanism of use is MN
With reference to latter 64 of 64 before HNP and HoA.And HA also constructs MN CoA using identical mechanism.When MN is in a PMIPv6
When being moved in domain, the HNP of the interface keeps constant (CoA is constant).Priority can voluntarily be set by MN according to actual conditions：
Value is bigger, and priority is higher, and the interface of highest priority is used for the data transfer of current business.
Due to introducing mapping table, so HA and MM protocol stack architecture is as shown in Figure 3.Mainly wrapped in MN and HA protocol stack
Mapping control and two parts of switching control are included：Mapping control section includes the data mapping tables module and client layer of kernel
Configuration, renewal, inquiry to mapping table and the interface module with other network entities；Switching control module then includes switching
Management and interface management, wherein handover management are used for handover decisions；And interface management enters the configuration of line interface.Mapping is controlled and cut
Changing between controlling needs to be communicated, to complete map updating.Mapping table module as a nucleus module, realize HoA and
Correspondence between the CoA of current physical interface.Upper layer application is so allowed for establish using HoA, and the packet actually sent
Sent by using CoA.Due to kernel repeating data can more rapidly, it is more efficient, therefore this patent propose but be not limited to
Address of cache and the forwarding of packet are carried out in kernel.
For LMA, it is necessary to establish with MAG tunnel to be moved in support region；In addition, LMA also needs to establish tunnel with HA,
Moved between support region.
3.1 registrations and synchronization
In order to be synchronized between MN and HA to binding information, this patent defines four kinds of signaling messages and extended
Agent binding update (Proxy Binding Update, PBU) and agent binding confirmation (Proxy Binding in PMIPv6
Acknowledgement, PBA) message, its specific form and operation are as described below.
(1) access request message
Access request message is sent to MAG by MN, wherein carry the relevant information of access network used interface.This patent
Specific message format is not limited, but must wherein carry MN HoA and the interface priority.
(2) access confirmation message
Access confirmation message is sent to MN by MAG, is the response to accessing request message, represents that network insertion and binding are same
Step successfully completes.
(3) PBU of extension
The PBU message of extension is to be sent to LMA by MAG, wherein in addition to comprising information specified in basic PMIPv6, also
Need carrying MN HoA, interface priority and MN HA addresses (Home AgentAddress, HAA).With LMA can initiate to
HA binding procedure.
(4) PBA of extension
The PBA message of extension is to be sent to MAG by LMA, is the response to extending PBU message.
(5) location update message
Location update message is to be sent to HA by LMA, and for carrying out MN location updating to HA, such HA is known that MN works as
It is preceding to be in which PMIPv6 domain, and used HNP.After HA receives the location update message of LMA transmissions, just reflecting in MN
Foundation in firing table/update the entry of the interface, and establish a bidirectional tunnel with LMA.Defined position renewal does not disappear this patent
The specific form of breath, but the HoA and LMA that must wherein include MN are the HNP of MN distribution, and further comprise that interface is excellent
First level.
(6) location updating confirmation message
Location updating confirmation message is to be sent to LMA by HA, is the response for location update message.LMA receives position
After updating confirmation message, represent and HA binding is completed, so as to establish the bidirectional tunnel with HA.
Switch between 3.2 single interface node domains
The flow that single interface node occurs to switch between domain is as shown in Figure 4.
1) when MN detects nMAG signals, and desires access to nMAG, access request message is sent to it first, wherein
Contain MN HoA；
2) then, nMAG initiates PBU message to the nLMA where it, and MN identity HoA and MN are carry in message
HA addresses (HAA)；
3) after nLMA has handled the message, just to HA launch position renewal processes, wherein it is this to carry nLMA
The HNP of MN distribution；
4) so, HA is just and nLMA establishes bidirectional tunnel, for forwarding corresponding HNP packet.Meanwhile HA is also established
For the mapping relations between the HoA and CoA of MN distribution；
5) HA updates confirmation message to nLMA home positions；That is HA sends confirmation message and sends confirmation message to LMA, LMA
To MAG, MAG sends confirmation message to MN, HNP is included in the confirmation message of reply, NM establishes CoA, obtains mapping table accordingly.
6) because MN is while nMAG is accessed, the pMAG where before have left, institute is in a reverse operation on pMAG
Carry out, to delete state old on pLMA and HA, i.e. tunnel between LMA and HA.
In node access procedure, MAG needs HoA in access request message to carry out access authentication to MN, and with
This is indexes to obtain MN relevant information, including MN authorization message, HA addresses etc. corresponding to MN.This patent is for this
Process not limits.
3.3 multiplex roles nodes switch
The flow that multiplex roles node switches is as shown in Figure 5.
1) when MN interface 1 is linked into pMAG, access request message is sent to it first, wherein containing MN HoA
With the priority of the interface；
2) then, pMAG initiates PBU message to the pLMA where it, carry in message MN HoA, interface priority and
MN HA addresses；
3) after pLMA has handled the message, just to HA launch position renewal processes, wherein not only including MN interface
Priority parameters, and carry the home network prefix (HNP1) for this interface assignment that pLMA is MN；
4) so, HA is just and pLMA establishes bidirectional tunnel, for forwarding corresponding HNP1 packet.Meanwhile HA is also built
The mapping relations between the HoA and this CoA1 for MN distribution are found；
5) HA updates confirmation message to pLMA home positions；
6) when MN interface 2 is linked into another nMAG, access request message is sent to it first, wherein containing MN
HoA and the interface priority；
7) then, nMAG initiates agent binding update messages (PBU) to the nLMA where it, carries MN's in message
HoA, interface priority and MN HA addresses；
8) after nLMA has handled the message, just to HA launch position renewal processes, wherein not only including MN interface
Priority parameters, and carry the home network prefix (HNP2) that nLMA is MN distribution；
9) so, HA is just and nLMA establishes bidirectional tunnel, for forwarding corresponding HNP2 packet.Meanwhile HA is also built
The mapping relations between the HoA and this CoA2 for MN distribution are found；
10) when MN wishes flow being switched to interface 2 from interface 1, the nMAG that is connected to interface 2 sends switching and disappeared
Breath, wherein containing the reset for interface priority, i.e. MN is more than interface 1 the priority level initializing of corresponding interface 2
Priority.So nMAG passes through and nLMA interaction, and nLMA passes through after the interaction with HA, and HA just have updated for MN
Mapping status.Hereafter, after HA receives the packet that CN issues MN, data is carried out with regard to the higher interface of selection priority and turned
Hair.
3.4 data forwarding process
The data forwarding process that this patent proposes is as shown in Figure 6.
1) when MN sends packet to CN, source address and destination address are HoA and CN respectively, when packet is sent out from interface
When sending, MN also needs to HoA being mapped as CoA corresponding to Priority highest interfaces；CN is the broad sense to be communicated with MN
Node, it may be possible to mobile is also likely to be not move, simply MN address and the prefix that CN knows.
2) after packet reaches MAG, MAG is packaged according to PMIPv6 tunneling mechanism to packet, and is dealt into LMA；
3) packet is sent to HA by LMA via bidirectional tunnel, and this tunnel is using HNP as index, that is, is corresponded to
The source address of packet；
4) after HA decapsulations, CoA is mapped further according to mapping table, packet is finally sent to CN；
5) MN packet is sent to for CN, is first routed to HA；
6) after and then carrying out destination address mapping according to Priority highests map entry via HA, forward again；
7) because the destination address of packet is the HNP that belongs to LMA, so being sent to LMA by tunnel；
8) after carrying out PMIPv6 tunnel encapsulations by LMA, packet is routed to MAG；
9) packet after decapsulation is transmitted to MN by MAG；
10) after MN is mapped destination address according to map entry, it is submitted to upper layer application.
Said process is basic data forwarding flow.In order to carry out routing optimality, any PMIPv6 road can be used
By Optimization Mechanism, the present invention not limits.
According to the data forwarding mechanism of the present invention, with reference to two concatenated tunnels and twice address of cache so that MN and CN are forever
It can far be communicated with fixed address, so as to ensure continuity that moving process is applied at the middle and upper levels.
Claims (7)
1. a kind of network global mobility communication means, its step are：
1) home agent HA is that mobile node MN distributes a unique and constant home address HoA；Wherein, the home agent HA
Control and manage the proxy mobile IPv 6 domain of multiple signings, each proxy mobile IPv 6 domain be provided with a local mobile anchor LMA and
Some Mobile Access Gateway MAG；
2) when the interface i of the mobile node MN detects i-th of mobile anchor point LMAiI-th of Mobile Access Gateway MAGiWhen, to
It sends access request message；Home address HoA of the access request message package containing the MN；
3) Mobile Access Gateway MAGiTo mobile anchor point LMAiAgent binding update messages PBU is sent, wherein including the MN's
Home address HoA and home agent HA address HAA；
4) as the LMAiAfter receiving the PBU message, to home agent HA launch position fresh information, wherein carry the LMAiFor
The home network prefix HNP of MN distributioni；
5) home agent HA is according to the HNPiA Care-of Address CoA is established for the interface i of the MNi, and be saved in the HoA of the MN with
In CoA mapping tables；Then to the LMAiHome position updates confirmation message, with the LMAiEstablish bidirectional tunnel；
6) LMAiTo the MAGiPBA message is sent, wherein carry the LMAiFor the home network prefix HNP of MN distributioni；Should
MAGiSend access confirmation message and give the MN, bidirectional tunnel is established with the MN；
7) HNPs of the MN in the confirmationiAccording to the method for step 5) Care-of Address CoA is established for interface ii, and protect
It is stored in HoA and CoA mapping tables；
8) when MN upper layer application sends packet by interface i to a certain node address CN；The MN by address (HoA,
CN) it is mapped as address (CoAi, CN), then pass through the MN and the MAGiBetween bidirectional tunnel send the packet to this
MAGi, the MAGiTo being dealt into LMA after the packet encapsulationi；
9) LMAiThe packet is built into bidirectional tunnel via step 5) and issues home agent HA；Home agent HA is to the data
After bag decapsulation, according to the HoA of the MN and CoA mapping tables by address (CoAi, CN) and address (HoA, CN) is mapped as, finally by number
Address CN is sent to according to bag；
10) packet of the MN is sent to for address CN, is first routed to home agent HA；Then home agent HA is according to this
Address (CN, HoA) is mapped as address (CN, CoA by MN HoA and CoA mapping tablei) after, build bidirectional tunnel via step 5)
Send the packet to the LMAi；The LMAiTo being sent to the MAG after the packet encapsulationi；The MAGiBy the number after decapsulation
The MN is sent to according to bag；Finally the MN reflects according to the HoA of local with CoA mapping tables is submitted to the upper layer application by the packet.
2. the method as described in claim 1, it is characterised in that when mobile node MN is from the MAG being currently accessediWhen exiting, Xiang Qi
Send the CoA for exiting request message and deleting local HoA and interface i in CoA mapping tablesi；This exits request message and includes this
MN home address HoA；The MAGiDelete the MAG built for interface iiThe bidirectional tunnel between the MN, while to the mobile anchor
Point LMAiSend agent binding and delete message, wherein the address HAA of home address HoA and home agent HA comprising the MN；When
The LMAiReceive binding delete message after, to home agent HA launch position fresh information, home agent HA according to the position more
Fresh information is deleted as the HA that interface i is built and the LMAiBetween should in bidirectional tunnel, and HoA and the CoA mapping table of the MN
Interface i CoAi。
3. method as claimed in claim 1 or 2, it is characterised in that also excellent comprising interface i in the access request message
First level；Interface i priority is also included in the location updating confirmation message.
4. method as claimed in claim 3, it is characterised in that the HoA and CoA mapping tables include a HoA, and with this
Some CoA corresponding to HoA, every CoA are provided with a priority.
5. method as claimed in claim 3, it is characterised in that the mobile node MN includes one or more interfaces, when every
When one interface is linked into a Mobile Access Gateway MAG, home agent HA creates in HoA and the CoA mapping table of the MN for interface
One CoA, while the MN creates a CoA in its local HoA and CoA mapping tables for the interface.
6. method as claimed in claim 5, it is characterised in that when the MN wishes flow being switched to interface j from interface i,
The MAG connected to interface jjHandover request is sent, wherein containing the reset for interface priority, i.e. MN is corresponding
The priority more than interface i of interface j priority level initializing；Then through MAGjWith the LMA where itjInteraction, and LMAjWith
HA interaction, HA update corresponding interface priority in HoA and the CoA mapping table of the MN, and then it is higher to choose interface priority by HA
Interface send data.
7. method as claimed in claim 1 or 2, it is characterised in that according to HNPiDescribed in rear 64 generations of first 64 and HoA
Care-of Address CoAi。
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| Design and Implementation of PMIPv6 Based Multihoming for;Zhi-Wei Yan等;《Journal of Internet Technology》;20101101;全文 * |
| 一种基于网络的全局移动性管理方法;曹大杏等;《现代电子技术》;20111101;全文 * |
| 基于PMIPv6的域间切换管理方法及性能分析;任三阳等;《计算机应用研究》;20100331;全文 * |
| 网络层移动性管理协议浅析;延志伟等;《科研信息化技术与应用》;20130531;全文 * |
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