CN103259882B - The dns server configuration of a kind of PMIPv6 and querying method - Google Patents
The dns server configuration of a kind of PMIPv6 and querying method Download PDFInfo
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- CN103259882B CN103259882B CN201310195609.4A CN201310195609A CN103259882B CN 103259882 B CN103259882 B CN 103259882B CN 201310195609 A CN201310195609 A CN 201310195609A CN 103259882 B CN103259882 B CN 103259882B
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Abstract
The present invention relates to dns server configuration and the querying method of a kind of PMIPv6, the method is by the RA(router advertisement to PMIPv6) message increases recursion server config option makes MAG(Mobile Access Gateway) there is the function of recursion server, and then utilize this MAG with recursion server function to all MN(mobile nodes) DNS query that sends processes, and optimizes DNS query process.Adopt the present invention can effectively reduce DNS query time delay and expense, improve Consumer's Experience and lifting mobile management of performance.
Description
Technical field
The invention belongs to domain name system (DNS) technical field, be specifically related to dns server configuration and the querying method of a kind of PMIPv6.
Background technology
As the most important basic resource in the Internet, nearly all internet, applications all needs to connect by domain name system (DomainName System, DNS) analysis service.But the configuration traditionally, carrying out DNS recursion server to node is all that static state completes when node access networks network mostly.How to provide dynamic dns server to configure and efficient DNS query to mobile node (Mobile Node, MN), for the Consumer's Experience under mobile environment, there is important impact.
As the expansion of mobile IP v 6 (Mobile IPv6, MIPv6) operation Network Based, proxy mobile IPv 6 (Proxy MobileIPv6, PMIPv6) is by signaling (Proxy Binding Update, the PBU of mobile management; And Proxy BindingAcknowledgement, PBA) all network entity is transferred to alternately---local mobile anchor (Local Mobility Anchor, and Mobile Access Gateway (Mobility Access Gateway LMA), MAG), to reducing handover overhead and agreement deployment difficulty.But all user data package (comprising the DNS query of MN) are all transmitted by the bidirectional tunnel between MAG and LMA.If MN and LMA is distant, because its DNS query still needs first to be forwarded by LMA through PMIPv6 tunnel, cause DNS query time delay and expense huge, have a strong impact on Consumer's Experience and mobile management performance.
Summary of the invention
The object of the invention is for the problems referred to above, the dns server configuration in a kind of PMIPv6 environment and querying method are provided, can effectively reduce DNS query time delay and expense, improve Consumer's Experience and lifting mobile management of performance.
The dns server configuration of the PMIPv6 that the present invention proposes and querying method, it is characterized in that: by the RA(Router Advertisement to PMIPv6, router advertisement) message increases recursion server config option makes MAG(Mobile Access Gateway) there is the function of recursion server, and then utilize this MAG with recursion server function to all MN(mobile nodes) DNS query that sends processes, and optimizes DNS query process.
The concrete steps that employing said method carries out dns server configuration and DNS query are as follows:
1) MN is accessed MAG;
2) according to PMIPv6 basic procedure, MAG and LMA(local mobile anchor) mutual PBU(Proxy BindingUpdate, agent binding update) message and PBA(Proxy Binding Acknowledgement, agent binding confirms) message, and set up bidirectional tunnel;
3) MN passes through and the mutual RS/RA(router solicitation/router advertisement of MAG) message, receive home network prefix, and configure available home address according to this;
4) receive the interface IP address that MAG provides recursion service in the recursion server config option that MN increases from RA message, carry out recursion server configuration;
5) MN sends DNS query request to MAG, and the recursion service interface of MAG carries out DNS response to MN after directly inquiring about asked domain name;
6) MN sets up upper layer application according to DNS response message, and packet is transmitted to destination address via after the tunnel transmission of MAG and LMA.
Further, described recursion server config option comprises: Type, is messages option type; Length is the option comprising Type and Length field; Pref., be priority, used when providing multiple recursion service interface to carry out DNS load balancing for MAG, value more high priority is higher; Reserved is the field that reserved follow-up function is expanded; And the field of MAG interface IP address of recursion service is provided.
The present invention is by disposing at MAG the local parsing that DNS recursion service provides optimization, by router advertisement (RA) message in expansion PMIPv6, carry recursion server address information option, the DNS query that all MN send is processed, and the DNS response data that buffer memory is corresponding, to expand PMIPv6 protocol operation, thus can farthest optimize DNS query process.The present invention can effectively reduce DNS query time delay and expense, improves Consumer's Experience and lifting mobile management of performance.
Accompanying drawing explanation
Fig. 1 is the RA option schematic diagram expanded in embodiment.
Fig. 2 is the PMIPv6 schematic flow sheet optimized in embodiment.
Embodiment
Below by specific embodiment, and coordinate accompanying drawing, the present invention will be further described.
In PMIPv6 environment, the DNS query due to all mobile nodes (MN) all needs via Mobile Access Gateway (MAG) process, so first the present invention proposes the logic function expanding MAG, makes it have the function of recursion server.Thus the DNS query that all MN send is processed, and the DNS response data that buffer memory is corresponding, thus farthest can play the effect optimizing DNS query process.
After being switched to new MAG at MN, configure new MAG address as its recursion server, need the router advertisement to PMIPv6 (RA) message to increase the recursion server config option shown in Fig. 1.In Fig. 1, the implication of each field is described as follows:
Top line numeral byte sequence number, is used to indicate field length below.
Type is messages option type, and what type is used to indicate this option is, namely comprises what information, in protocol level, is the field of a uniqueness value.Be home network prefix option if Type is 22 expressions option below, Type is 23 expressions option is below switch designator option, etc.
Length is the option comprising Type and Length field.For each option, its length is indicated so that determine to belong to the scope of the data of this option, to be the basic characteristics of ICP/IP protocol.
Pref. be priority, this field is used for when MAG provides multiple recursion service interface to carry out DNS load balancing used, and value more high priority is higher.Such as, MAG provides DNS recursion resolution to serve by three different interfaces, corresponding Pref. value is so set in the message sent to specific MN, as in the option that certain MN receives, Pref. value is 1,2 and 3, so MN can preferentially use value to be the address of the address in the option of 3 as its DNS recursion resolution after receiving.
Reserved is the field of reserved follow-up function expansion.
Last " recursion server " field is for providing the MAG interface IP address of recursion service.
Protocol operation after expansion is as shown in Figure 2, as follows to this renewal rewards theory flow process specific explanations:
1-1:MN accesses MAG1.
The mutual PBU message of 1-2: according to PMIPv6 basic procedure, MAG1 and LMA and PBA message, set up bidirectional tunnel.
After 1-3:PMIPv6 binding procedure completes, MN passes through and the mutual RS(Router Solicitation of MAG1, router solicitation)/RA message, receive home network prefix (the Home Network Prefix of 64 prefixes, HNP), MN configures available home address (Home Address, HoA) according to this.In addition, according to the RA option of expansion, MN can receive the interface IP address that MAG1 provides recursion service from RA, thus DNS request is all sent to this address and resolves, thus carries out recursion server configuration.
1-4: when MN needs to set up via DNS query to comprise WEB, during the upper layer application such as mail, ftp, send DNS query request to MAG1.The recursion service module of MAG1 responds MN after directly inquiring about asked domain name, and due to as recursion server, this query messages source address of MAG1 is the address of MAG1 self, thus avoids the process of PMIPv6 tunnel encapsulation.
1-5:MN is according to DNS response message, and start to carry out upper layer application foundation, packet is transmitted to destination address via after the tunnel transmission of MAG1 and LMA.
2-1:MN accesses MAG2.
Mutual PBU and the PBA message of 2-2: according to PMIPv6 basic procedure, MAG2 and LMA, sets up bidirectional tunnel.
After 2-3:PMIPv6 binding procedure completes, MN passes through and the mutual RS/RA message of MAG2, receives constant HNP.In addition, according to the RA option of expansion, MN can receive the interface IP address that MAG2 provides recursion service from RA, thus carries out recursion server config update.
The recursion service module of 2-4: when MN needs to set up upper layer application via DNS query, send DNS query request to MAG2, MAG2 responds MN after inquiring about asked domain name.
2-5:MN is according to DNS response message, and start to carry out upper layer application foundation, packet is transmitted to destination address via after the tunnel transmission of MAG2 and LMA.
Although disclose specific embodiments of the invention and accompanying drawing for the purpose of illustration, its object is to help understand content of the present invention and implement according to this, but it will be appreciated by those skilled in the art that: without departing from the spirit and scope of the invention and the appended claims, various replacement, change and amendment are all possible.The present invention should not be limited to the content disclosed in this specification embodiment and accompanying drawing, and the scope that the scope of protection of present invention defines with claims is as the criterion.
Claims (3)
1. dns server configuration and querying method in a PMIPv6 environment, it is characterized in that: make Mobile Access Gateway MAG have the function of recursion server by increasing recursion server config option to the router advertisement message of PMIPv6 and RA message, and then utilize this MAG with recursion server function to process the DNS query that all mobile node MN send, optimize DNS query process;
Described recursion server config option comprises: Type, is messages option type; Length is the option comprising Type and Length field; Pref., be the priority of correspondence arranged in the message that sends to specific MN, used when MAG provides multiple recursion service interface to carry out DNS load balancing, value more high priority is higher; Reserved is the field that reserved follow-up function is expanded; And the field of MAG interface IP address of recursion service is provided;
The step of carrying out DNS query comprises:
1) MN accesses MAG;
2) according to PMIPv6 basic procedure, mutual PBU and the PBA message of MAG and local mobile anchor LMA, and set up bidirectional tunnel; Wherein PBU message and agent binding update messages, PBA message and proxy binding acknowledgment messages;
3) MN passes through and the mutual RS/RA message of MAG, receives home network prefix, and configures available home address according to this; Wherein RS/RA message and router solicitation/router advertisement message;
4) receive the interface IP address that MAG provides recursion service in the recursion server config option that MN increases from RA message, carry out recursion server configuration;
5) MN sends DNS query request to MAG, and the recursion service interface of MAG carries out DNS response to MN after directly inquiring about asked domain name;
6) MN sets up upper layer application according to DNS response message, and packet is transmitted to destination address via after the tunnel transmission of MAG and LMA.
2. the method for claim 1, is characterized in that, MN uses the address in the option that priority is the highest as the address of DNS recursion resolution.
3. the method for claim 1, is characterized in that, step 6) described upper layer application comprises: WEB application, and mail applies, and ftp applies.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310195609.4A CN103259882B (en) | 2013-05-23 | 2013-05-23 | The dns server configuration of a kind of PMIPv6 and querying method |
| PCT/CN2013/089844 WO2014187122A1 (en) | 2013-05-23 | 2013-12-18 | Lma dynamic discovery method in pmipv6 environment |
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| CN201310195609.4A CN103259882B (en) | 2013-05-23 | 2013-05-23 | The dns server configuration of a kind of PMIPv6 and querying method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483636A (en) * | 2008-01-11 | 2009-07-15 | 华为技术有限公司 | Method, system, customer terminal for mobile IP establishment, and anchor point management apparatus |
| WO2009143723A1 (en) * | 2008-05-27 | 2009-12-03 | 华为技术有限公司 | Method, system and node for keeping session continuity at the time of handover between different domains |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483636A (en) * | 2008-01-11 | 2009-07-15 | 华为技术有限公司 | Method, system, customer terminal for mobile IP establishment, and anchor point management apparatus |
| WO2009143723A1 (en) * | 2008-05-27 | 2009-12-03 | 华为技术有限公司 | Method, system and node for keeping session continuity at the time of handover between different domains |
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