CN103249026B - A kind of method supporting HNP to renumber in PMIPv6 - Google Patents
A kind of method supporting HNP to renumber in PMIPv6 Download PDFInfo
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Abstract
The present invention relates to a kind of method supporting HNP to renumber in PMIPv6, its step comprises: 1) local mobile anchor is that the mobile node that generation HNP renumbers distributes new HNP; 2) LMA sends PBU message to Mobile Access Gateway, comprises new HNP information and identification information corresponding to mobile node in HNP option wherein; 3) Mobile Access Gateway constructs router advertisement message after receiving this PBU message, and the vital values of old HNP is set to 0, the vital values of new HNP is set to the value being greater than 0; 4) after mobile node receives this router advertisement, delete old HNP, and adopt new HNP to configure effective mailing address.Of the present invention based on PMIPv6 basic operation flow process, propose active HNP and to renumber solution, that effectively can reduce that the current HNP prefix based on passive type changes that handling process causes crosses long time delay.
Description
Technical field
The invention belongs to networking technology area, be specifically related to a kind of method supporting HNP to renumber in PMIPv6.
Background technology
In recent years, radio network technique and developing rapidly of application service have started the mobile computing epoch.But in conventional mobile communications net, mobile management is carried out at link layer.Along with to IP-based packet switching network transition, link layer mobility can not solve different IP subnet and switch the problem brought.So IETF starts research and the standardization effort of network layer mobility agreement.At first, the network layer mobility agreement that IETF proposes is all client-based, as mobile IP v 6 (Mobile IPv6, MIPv6) (C.Perkins, et al., Mobility Support in IPv6, IETF RFC6275, July2011.) and Extended Protocol.But the mobility management protocol based on terminal exists some drawbacks, upgrade the software of existing terminal, increase terminal complexity and electric quantity consumption as needed, a large amount of mobility signaling takies Radio Resource etc.Consider based on these factors, IETF has set up NetLMM working group, proposes network mobility management protocol demand.After long-term discussion, formally issue proxy mobile IPv 6 (Proxy Mobile IPv6, PMIPv6) standard (S.Gundavelli, et al., Proxy Mobile IPv6, IETF RFC5213, August2008.).Network mobility management protocol does not need terminal to participate in mobility management process, and all mobility signalings are all completed by network, which solves the problem of functional requirement problem to terminal and waste of radio resources.
PMIPv6 introduces local mobile anchor (Local Mobility Anchor, LMA) and Mobile Access Gateway (Mobility Access Gateway, MAG) two new functional entitys on the basis of MIPv6.LMA supports the function of HA in MIPv6, and expands its banding cache.In addition, LMA is that each MN distributes a unique home network prefix (Home Network Prefix, HNP), remains unchanged when changing for mobile node (Mobile Node, MN) occurrence positions, thus makes its upper layer application by the impact that node switches.If but due to following three kinds of reasons cause MN distribute HNP occur network renumber, then the network operating feature of current PMIPv6 cannot initiatively find this change thus timely for MN distributes new HNP:
1) PMIPv6 service provider obtains HNP set from upstream ISP distribution, if there is the change of ISP, then need to upgrade its HNP and gather (S.Jiang, et al., IPv6Enterprise Network Renumbering Scenarios and Guidelines, draft-ietf-6renum-enterprise-02, September2012.);
2) multiple LMA may co-exist in the network of same PMIPv6 service provider, if mobile node has substituted LMA but transfer is not the HNP of its distribution, new LMA is then needed to redistribute HNP(J.Korhonen, et al., RuntimeLocal Mobility Anchor (LMA) Assignment Support for Proxy Mobile IPv6, IETF RFC6463, February2012.);
3) due to the change of the network architecture, change (S.Jiang, et al., the IPv6Enterprise NetworkRenumbering Scenarios and Guidelines of prefix information may be caused, draft-ietf-6renum-enterprise-02, September2012.).
In mipv 6, mobile management is controlled by MN oneself, when home network generation network prefix renumbers, by mobile prefix, home agent can find that (mobile prefix discovery) mechanism upgrades in time to MN, thus make it configure new home address.In PMIPv6 basic agreement, although contemplate the possibility that HNP renumbers, the solution (see RFC5213, Section6.12) that specification is not relevant in the standard.
Summary of the invention
The object of the invention is for the problems referred to above, a kind of method supporting HNP to renumber in PMIPv6 be provided, when the HNP that distributes for MN occur network renumber time, PMIPv6 initiatively can find that this changes thus timely for MN distributes new HNP.
For achieving the above object, the present invention adopts following technical scheme:
Support the method that HNP renumbers in PMIPv6, its step comprises:
1) LMA(Local Mobility Anchor, local mobile anchor) for there is HNP(Home Network Prefix, home network prefix) MN that renumbers distributes new HNP;
2) LMA is to MAG(Mobility Access Gateway, Mobile Access Gateway) send PBU(Proxy BindingUpdate, agent binding update) message, comprise new HNP information and MN(Mobile Node in HNP option wherein, mobile node) corresponding identification information;
3) MAG constructs router advertisement message after receiving this PBU message, and the vital values of old HNP is set to 0, the vital values of new HNP is set to the value being greater than 0;
4) after MN receives this router advertisement, delete old HNP, and adopt new HNP to configure effective mailing address.
Further, MAG sends PBA(Proxy Binding Acknowledgement, and agent binding confirms) message is to LMA, and the renewal noticing HNP information completes, and LMA is accepted and forwards the packet being sent to new HNP.
Further, to be the method that MN distributes new HNP be LMA: LMA selects the prefix of a 64bits to be assigned to MN from new HNP gathers.
According to basic PMIPv6 agreement, the process that HNP changes is divided into two types: 1, and when the switching between LMA occurs MN, new LMA may assign new HNP for MN; When the current HNP vital values of 2, MN is expired, just can asks HNP by MAG, thus obtain new HNP.Of the present invention based on PMIPv6 basic operation flow process, propose active HNP and to renumber solution, that effectively can reduce that the current HNP prefix based on passive type changes that handling process causes crosses long time delay.
Accompanying drawing explanation
Fig. 1 is that in embodiment, the network of PMIPv6 renumbers the operational flowchart of method.
Fig. 2 is the schematic diagram of PBU message in embodiment.
Fig. 3 is the schematic diagram of the home network prefix option carrying HNP in embodiment.
Fig. 4 is the identification options schematic diagram of MN in embodiment.
Fig. 5 is the form schematic diagram of PBA message in embodiment.
Embodiment
Below by specific embodiment, and coordinate accompanying drawing, the present invention is described in detail.
The method supporting HNP to renumber in the PMIPv6 of the present embodiment, its operating process as shown in Figure 1, wherein:
[CN:MN-HoA1]: represent that the source address of packet and destination address are the address of CN and the HoA1 of MN;
[CN:MN-HoA2]: represent that the source address of packet and destination address are the address of CN and the HoA2 of MN;
[LMAA:Proxy-CoA] [CN:MN-HoA1]: represent that the raw data packets source address of this tunnel encapsulation packet and destination address are the address of CN and the HoA1 of MN, and the source address of tunnel head and destination address are the address Proxy-CoA of address LMAA and MAG of LMA;
[LMAA:Proxy-CoA] [CN:MN-HoA2]: represent that the raw data packets source address of this tunnel encapsulation packet and destination address are the address of CN and the HoA2 of MN, and the source address of tunnel head and destination address are the address Proxy-CoA of address LMAA and MAG of LMA;
MN-ID: the mark being MN;
RA (Lifetime_HNP1=0 & Lifetime_HNP2>0): represent that the vital values Lifetime_HNP1 value comprising two information: HNP1 in router advertisement message (RA) is 0, and the vital values Lifetime_HNP2 value of HNP2 is greater than zero.
Concrete steps are:
1) when the HNP of MN renumbers, LMA is that this MN distributes new HNP.
Because LMA is that so the change of gathering for its HNP managed that its upper strata ISP changes or other reasons causes, LMA knows prior to MAG and MN for MN assigns the network entity of concrete HNP.When the HNP of MN renumbers, LMA selects the prefix of a 64bits to be assigned to MN, namely new HNP from new HNP gathers.
2) LMA sends PBU message to MAG, comprises new HNP information and identification information corresponding to MN in HNP option wherein.
Concrete form, with reference to RFC5213, belongs to the content of standard P MIPv6 agreement.Its form as shown in Figure 2.PBU message adds P flag bit on basic mobile IPv 6 protocol and Extended Protocol basis thereof, is used to indicate the binding update messages that this is a PMIPv6.
In addition, essential information carries the home network prefix option of HNP and the option of MN mark, and its form respectively as shown in Figure 3 and Figure 4.Fig. 3 carries in the home network prefix option of HNP, and Type value is 22, and length is 18, and the length of the IPv6 prefix comprised in prefix length instruction option, last HNP field carries concrete IPv6 prefix.Fig. 4 is the option of MN mark, and it is the mark of mobile node in proxy mobile IPv 6 territory.It is the fixing mark of mobile node, makes the total energy of the mobile entity in proxy mobile IPv 6 territory obtain and use.It may be network access Identifier NAI or other identify such as MAC address.
3), after MAG receives this PBU, find that LMA is that this MN assigns new HNP, thus recognize that the old HNP of MN is invalid.
4) MAG constructs router advertisement message successively, wherein the vital values of old HNP is set to 0, and the vital values of new HNP is set to the value being greater than 0.
5) in addition, MAG sends PBA message to LMA, and the renewal of advertised prefix information completes, thus LMA can be made to know, and this HNP is successfully distributed to MN, and then packet corresponding for this HNP is transmitted to MN by MAG, even if LMA accepts and forwards the packet being sent to new HNP.Wherein the form of PBA message as shown in Figure 5.
6) MN receiving router advertisement recognizes that HNP changes, thus the existing address on delete interface, and adopt new HNP to configure effective mailing address.
Above embodiment is only in order to illustrate technical scheme of the present invention but not to be limited; those of ordinary skill in the art can modify to technical scheme of the present invention or equivalent replacement; and not departing from the spirit and scope of the present invention, protection scope of the present invention should be as the criterion with described in claim.
Claims (6)
1. support the method that home network prefix renumbers in proxy mobile IPv 6, its step is as follows, and wherein LMA is local mobile anchor, and HNP is home network prefix, and MN is mobile node, and MAG is Mobile Access Gateway, and PBU is agent binding update:
1) LMA is that the MN that generation HNP renumbers distributes new HNP;
2) LMA sends PBU message to MAG, comprises new HNP information and identification information corresponding to MN in HNP option wherein;
3) MAG constructs router advertisement message after receiving this PBU message, and the vital values of old HNP is set to 0, the vital values of new HNP is set to the value being greater than 0;
4) after MN receives this router advertisement, delete old HNP, and adopt new HNP to configure effective mailing address.
2. the method for claim 1, is characterized in that: MAG sends proxy binding acknowledgment messages to LMA, and the renewal noticing HNP information completes, and LMA is accepted and forwards the packet being sent to new HNP.
3. the method for claim 1, is characterized in that, to be the method that MN distributes new HNP be LMA: LMA selects the prefix of a 64bits to be assigned to MN from new HNP gathers.
4. the method for claim 1, is characterized in that: described PBU message increases a P flag bit on basic mobile IPv 6 protocol and Extended Protocol basis thereof, is used to indicate the binding update messages that it is a PMIPv6.
5. method as claimed in claim 4, is characterized in that: described PBU message comprises the option of home network prefix option and the MN mark of carrying HNP.
6. method as claimed in claim 5, is characterized in that: described MN mark is network access Identifier NAI or MAC address.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310195495.3A CN103249026B (en) | 2013-05-23 | 2013-05-23 | A kind of method supporting HNP to renumber in PMIPv6 |
| PCT/CN2013/089844 WO2014187122A1 (en) | 2013-05-23 | 2013-12-18 | Lma dynamic discovery method in pmipv6 environment |
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| CN201310195495.3A CN103249026B (en) | 2013-05-23 | 2013-05-23 | A kind of method supporting HNP to renumber in PMIPv6 |
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| CN104038374B (en) * | 2014-06-10 | 2017-12-29 | 新华三技术有限公司 | A kind of interface message amending method and equipment |
| CN104486750B (en) * | 2014-11-27 | 2017-12-15 | 中国科学院计算机网络信息中心 | A kind of network global mobility communication means |
| CN105827746A (en) * | 2016-03-11 | 2016-08-03 | 中国互联网络信息中心 | Method for active reconfiguration of network prefix in agent mobile IPv6 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702800A (en) * | 2009-11-19 | 2010-05-05 | 中国科学院计算技术研究所 | Agent mobile communication system and method |
| CN102611761A (en) * | 2011-01-20 | 2012-07-25 | 中兴通讯股份有限公司 | Method and system for PMIPv6 protocol to support IPv6 prefix distribution |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702800A (en) * | 2009-11-19 | 2010-05-05 | 中国科学院计算技术研究所 | Agent mobile communication system and method |
| CN102611761A (en) * | 2011-01-20 | 2012-07-25 | 中兴通讯股份有限公司 | Method and system for PMIPv6 protocol to support IPv6 prefix distribution |
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