CN100542181C - A kind of method and system that obtains home network DHCPv6 server info - Google Patents
A kind of method and system that obtains home network DHCPv6 server info Download PDFInfo
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- CN100542181C CN100542181C CNB2005101241523A CN200510124152A CN100542181C CN 100542181 C CN100542181 C CN 100542181C CN B2005101241523 A CNB2005101241523 A CN B2005101241523A CN 200510124152 A CN200510124152 A CN 200510124152A CN 100542181 C CN100542181 C CN 100542181C
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Abstract
The invention discloses a kind of method of obtaining home network DHCPv6 server info.Comprise: A, access service network gateway send the access authentication request message according to terminal request to authentication and accounting server, in the described access authentication request message, carry terminal iidentification; B, authentication and accounting server obtain home network DHCPv6 server info, and send to access service network gateway according to described terminal iidentification; C, access service network gateway send to terminal with described home network DHCPv6 server info.The invention also discloses a kind of system that obtains home network DHCPv6 server info.The present invention program has provided the scheme of obtaining home network DHCPv6 server info in the WiMAX network, can make things convenient for the user to obtain home network DHCPv6 server info.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method and system that obtains home network DHCPv6 server info.
Background technology
WiMAX (Worldwide Interoperability for Microwave Access), Chinese full name are that the microwave interoperability is inserted in the whole world, are a kind of wireless metropolitan area network technologies based on IEEE 802.16 standards.It is client (MSS/SS Mobile SubscriberStation/Subscriber Station) that the WiMAX network mainly is made up of three parts, accessing business network (ASN Access Service Network) (comprising base station (BS Base Station) and accessing business network gate (ASN GW ASN Gateway)), and connection service network (CSN Connectivity Service Network) (comprises prepaid server (PPSPrepaid Server), authentication and accounting server (AAA Server Authentication, Authorization and Accounting Server)) logic entity such as.WiMAX network wireless side is based on the wireless MAN access technology of IEEE 802.16d/e standard.What now mainly follow is IEEE 802.16-2004 (802.16d) standard of formulating in July, 2004.IEEE 802.16-2004 (802.16d) standard operation frequency range be 2GHz to 11GHz, be to authorize and unauthorized mixing frequency range.Adopt OFDM (OFDM Orthogonal frequency division multiplexing) and OFDM to insert (OFDMA, Orthogonal Frequency Division Multiplex Access) physical layer, effectively anti-multipath decline.Under the optimum channel decline situation, transmission rate can be approached 75Mbps.IEEE802.16-2004 (802.16d) standard is used for the non line of sight point-to-multipoint technology of metropolitan area network, mainly is the form of fixing and nomadic network, just can add the technology of supporting simple mobile communication in question IEEE 802.16e.
As shown in fig. 1, SS/MSS (Subscriber Station/Mobile Subscriber Station) expression WiMAX terminal, its with ASN between be connected by wireless mode.
The effect of ASN mainly comprises the following aspects:
Guarantee two layers of establishment of connection between WiMAX terminal and the WiMAX base station;
RRM;
The optimal selection of network discovery and WiMAX user network service provider;
Under the proxy-mobile IP pattern, serve as acting server control WiMAX user's authentication and charging message;
Use establishment of connection for three layers at WiMAX terminal relaying is provided;
The effect of CSN mainly comprises the following aspects:
Be WiMAX user conversation distributing IP address;
Provide the Internet to insert;
Serve as authentication and charging proxy server or authentication and accounting server;
Carry out strategy and access control based on user contracting data;
Support the foundation in tunnel between ASN and the CSN;
Support the generation of WiMAX user's ticket and the WiMAX business accounting between the cross operator;
Support the foundation in roaming tunnel between the CSN;
Support the mobility between the ASN;
Support multiple WiMAX business, for example location-based business, teleservice, multimedia broadcasting and multicast service etc.;
IPv6 (Internet Protocol Version 6), it is the Internet protocol of next version, its proposition is because along with Internet fast development at first, and the limited address space of IPv4 definition is with depleted, and the deficiency of address space will influence further developing of the Internet.In order to enlarge address space, intend redefining address space by IPv6.IPv4 adopts 32 bit address length, has only about 4,300,000,000 addresses, estimate will be assigned with in the period of 2005～2010 to finish, and IPv6 adopts 128 bit address length, almost can provide the address without restriction.In the design process of IPv6, except once and for all solves the address shortage problem, also considered in IPv4, to solve bad other problem.The main advantage of IPv6 is embodied in following several respects: enlarge address space, improve network entire throughput, improve service quality (QoS), fail safe better assurance arranged, support plug and play and mobility, better realize the multicast function.
MIPv6 (Mobile Internet Protocol Version 6) is a mobile IP v 6, is the mobile release protocol at IPv6.Always the main target of mobile IP v 6 makes mobile node pass through the home address addressing exactly in the IPv6 network, no matter be connected home network or move to field network.Mobile IP v 6 is fully transparent for the protocol layer more than the IP layer, and this makes mobile node between different sub-network when mobile, and the application program that operates on this node need not revised or dispose still available.As shown in Figure 2, be the network communication architectures under the mobile IP v 6 scheme, wherein the operation of mobile IP v 6 network of network is as follows:
Mobile node adopts the router search (Router Discovery) of IPv6 version to determine its Care-of Address;
Work the same with router when mobile node is connected on its home network with any fixing main frame;
When mobile node was connected on the field network, the address automatic distributing method that it adopts IPv6 to define obtained the Care-of Address on the field network;
Mobile node is notified to home agent with its Care-of Address;
If the fail safe in the time of can guaranteeing to operate, mobile node are also with its Care-of Address notifying communication node;
Do not know the same route of carrying out in packet that the communication node of the Care-of Address of mobile node sends and the mobile IPv 4, be the home network that they are routed to mobile node earlier, home agent is delivered to their process of passing through tunnel the Care-of Address of mobile node more therefrom;
Know that the packet that the communication node of mobile node Care-of Address is sent can utilize IPv6 routing header directly to give mobile node, the routing header with the Care-of Address of mobile node as destination address in the middle of;
In the opposite direction, the packet sent of mobile node adopts special mechanism to be routed directly to their destination.Yet when having the filtration of Way in, mobile node can be given home agent by the tunnel with packet, and the source address in tunnel is the Care-of Address of mobile node
Below be some terminological interpretations commonly used in the mobile IP v 6.
Mobile node: i.e. our usually said portable terminal, communication process is just and the common net ruton when home network for it
The letter flow journey is the same, but just adopts the communication process of mobile IP v 6 when it has been moved field network.
Communication node: communication node promptly with mobile node generation nodes in communication, itself address can be that IPv4 also can be IPv6.
Home network: the long-term resident or residing network when registering of opening an account of mobile node.
Home agent: also being home agent, generally is a router in the moving nodes local network.
Home address: portable terminal is IP address allocated in home network.
Field network: residing non-home network after mobile node moves.
Care-of Address: the temporary ip address that is used to communicate by letter that mobile node distributes at field network.
Link local address (link-local address): IPv6 stipulates that all network interfaces all will have a link local address at least, and its form is: FE80: :/64bit+ network interface sign/64bit.
The distribution method of IP address has four kinds in the IPv6 network, and stateless disposes (Statelessauto-configuration) automatically, has state to dispose (Stateful auto-configuration) automatically, mixes configuration (Hybrid Stateful/Stateless auto-configuration) and manual configuration (ManualConfiguration) automatically.
Stateless disposes automatically: mobile node can generate a global ip address automatically according to the prefix information and the network interface information of oneself of current place network;
There is state to dispose automatically: to use the DHCPv6 agreement to particular DHCP server request IP address;
Mix configuration automatically: mix stateless and the method for automatic configuration that the state method of automatic configuration is arranged;
Manual configuration: carry out human configuration by the business personnel.
The scheme of obtaining Dynamic Host Configuration Protocol server information in WiMAX " 050915_NWG_STAGE2.doc " document is based on the DHCPv6 agreement and obtains the home address flow process, as shown in Figure 3, what be based on DHCPv6 has a state I P address allocation flow figure, as seen from the figure, mainly may further comprise the steps:
Other authentication of S01, Access Layer level is for example based on the authentication of EAP-over-PKMv2.IP address assignment and IP host configuration.
S02, success carry out authentication and authorization after, terminal sends a DHCP Solicit message to all dhcp relay agents and server and finds available Dynamic Host Configuration Protocol server (with reference to rfc3315)
S03, in case receive a DHCP Solicit message, ASN-GW gives Dynamic Host Configuration Protocol server as a dhcp relay agent with this DHCP Solicit forwards.
S04, any one can the response terminal request Dynamic Host Configuration Protocol server all respond a DHCPAdvertise message, send to dhcp relay agent ASN-GW.
S05, ASN-GW send to terminal as dhcp relay agent with the response DHCPAdvertise message of Dynamic Host Configuration Protocol server.
S06﹠amp; The S07 terminal is selected a Dynamic Host Configuration Protocol server, and sends a request message by dhcp relay agent to this Dynamic Host Configuration Protocol server.
S08﹠amp; The S09DHCP server is replied a Reply message by dhcp relay agent to terminal, wherein comprises the address and the configuration information parameter of affirmation.
Step S02 has shown the method for obtaining the DHCPv6 server info in the WiMAX network among Fig. 3 to step S06, promptly obtain the intention of DHCPv6 server info by DHCPv6 message multicast oneself in network, behind the response message of terminal many DHCPv6 servers in receiving network, final select wherein a DHCPv6 server and obtain its information.
The shortcoming of such scheme is as follows:
1, terminal can only be by the DHCPv6 agreement to network multicast acquisition request DHCPv6 server info in the WiMAX network, and obtain manner is single, and flexibility ratio is not high, is unfavorable for expansion.
2, terminal sends multicast message acquisition request DHCPv6 server info by the DHCPv6 agreement to network in the WiMAX network, has taken the network bandwidth to a certain extent, has influenced network performance.
Summary of the invention
The invention provides a kind of method of obtaining home network DHCPv6 server info, single in order to exist terminal to obtain home network DHCPv6 server info mode in the solution prior art, flexibility ratio is not high, be unfavorable for expansion, and in request process, take the network bandwidth, influence the problem of network performance.
The method that the present invention obtains home network DHCPv6 server info comprises:
A, access service network gateway send the access authentication request message according to terminal request to authentication and accounting server, in the described access authentication request message, carry terminal iidentification;
B, authentication and accounting server obtain home network DHCPv6 server info, and send to access service network gateway according to described terminal iidentification;
C, access service network gateway send to terminal with described home network DHCPv6 server info.
The system that the present invention obtains home network DHCPv6 server info comprises access service network gateway and authentication and accounting server, also comprises:
The terminal iidentification recognition unit is positioned at described authentication and accounting server, is used for the identification terminal sign;
Home network DHCPv6 server info is provided with the unit, be positioned at described authentication and accounting server, be used for recognition result, home network DHCPv6 server info is set in sending to first message of access service network gateway according to described terminal iidentification recognition unit transmission.
The present invention program provides the new method of obtaining home network DHCPv6 server info in the WiMAX network, improved the flexibility ratio of system, is convenient to expansion.
Avoid original WiMAX network to obtain home network DHCPv6 server info need send multicast message in network shortcoming, improved the WiMAX network performance to a certain extent.
Description of drawings
Fig. 1 is a WiMAX cellular logic configuration diagram in the prior art;
Fig. 2 is a mobile IP v 6 network communication architectures schematic diagram in the prior art;
The principle process schematic diagram of Fig. 3 in the WiMAX network, using for MIPv6 in the prior art;
Fig. 4 is the present invention program one a schematic flow sheet;
Fig. 5 is the present invention program two a schematic flow sheet;
Fig. 6 obtains the schematic network structure of the system of home network DHCPv6 server info for the present invention.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
A kind of method of obtaining home network DHCPv6 server info of the present invention, be by in the WiMAXIPv6 network, home network DHCPv6 server info directly is issued to terminal or is issued to ASN-GW by authentication message, terminal or directly obtain from authentication message is perhaps obtained from ASN-GW.
According to above-mentioned thinking, there are two kinds of flow processs to obtain home network DHCPv6 server info from network side.
Scheme one:
Home network DHCPv6 server info directly is issued to terminal in the authentication stage of finishing, and related procedure as seen from the figure, mainly may further comprise the steps as shown in Figure 4:
S11, terminal are initiated the access authentication request.
Terminal is initiated the access authentication request to ASN-GW, is responsible for the access authentication of network side mutual by ASN-GW.
S12, ASN-GW send to described H-AAA server and insert request message Access-Request.
The access authentication request that ASN-GW sends according to described terminal, send access request message Access-Request to the H-AAA server, carry the identification information of this terminal among this access request message Access-Request, can adopt the network access identifier NAI of terminal here.
S13, H-AAA server find the home network DHCPv6 server info relevant with this terminal according to network access identifier NAI at network side.
The H-AAA server is searched the server info with the pairing home network DHCPv6 of this terminal according to network access identifier NAI at network side.
S14, H-AAA server send the request of access to ASN-GW and accept message Access-Accept, carry home network DHCPv6 server info in the described message.
The H-AAA server is responded the request of access to ASN-GW and is accepted message Access-Accept, wherein carries the home network DHCPv6 server info of counterpart terminal NAI.
S15, ASN-GW send the access authentication success message to terminal, carry home network DHCPv6 server info in this message.
H-AAA server in the scheme also can be according to the user terminal location difference, and adopts the V-AAA server.
When ASN-GW receives after described access request accepts message Access-Accept, it sends the access authentication success message to terminal, carries the home network DHCPv6 server info corresponding to described terminal NAI in this message.
In the such scheme one, ASN-GW receives after access request that the H-AAA server sends accepts message Access-Accept, and the home network DHCPv6 server info that wherein carries counterpart terminal NAI is directly carried out transparent transmission, with its transparent transmission to terminal.
Scheme two:
Home network DHCPv6 server info is issued to ASN-GW in the authentication stage of finishing, and is preserved by ASN-GW, and the follow-up DHCPv6 of the re-using message of terminal is obtained from ASN-GW, as shown in Figure 5, may further comprise the steps:
S21, terminal are initiated the access authentication request.
Terminal is initiated the access authentication request to ASN-GW, is responsible for the access authentication of network side mutual by ASN-GW.
S22, ASN-GW send Access-Request message to the H-AAA server, wherein carry the NAI of marking terminal.
S23, H-AAA server find the home network DHCPv6 server info relevant with this terminal according to network access identifier NAI at network side.
S24, H-AAA server are responded Access-Accept message to ASN-GW, wherein carry the home network DHCPv6 server info of counterpart terminal NAI.
S25, ASN-GW preserve the home network DHCPv6 server info of described counterpart terminal NAI.
With directly the described home network DHCPv6 of transparent transmission server info is different in the scheme one, in scheme two, earlier this home network DHCPv6 server info is kept by ASN-GW, directly be not issued to terminal.
S26, ASN-GW send the access authentication success message to terminal, inform this access authentication success.
S27, terminal are finished the foundation and the obtaining with DAD of link local address of registration, data channel and are detected according to described access authentication success message.
In step S27, the form of described link local address is: FE80: :/64bit+InterfaceIdentifier (network interface identifier)/64bit, and wherein FE::80 is a known link-local prefix; Interface identifier is that 64bits is long, and available based on the calculating of EUI-64 method, for example we can calculate its interface identifier of 64 according to the 48 bit mac addresses of MSS.After if the DAD detection is carried out in the address hereto, find that not having any address on the link-local conflicts with it, promptly the link-local address of MSS is unique on link-local.Can think that then the interfaceidentifier of MSS also is unique on link-local.How the concrete generating algorithm of Interface Identifier and DAD all has known arrangement to exist if detecting, this paper is no longer discussed.
S28, terminal send Information Request message to ASN-GW, show request home network DHCPv6 server info.
In this step, adopt the mode of terminal active request to obtain home network DHCPv6 server info, finish after obtaining of the foundation of registration, data channel and link local address detect with DAD in terminal, directly send Information Request message, request home network DHCPv6 server info to ASN-GW.
S29, ASN-GW reply response message Reply, wherein the home network DHCPv6 server info of carried terminal request to terminal.
ASN-GW receives and replys response message Reply, wherein the home network DHCPv6 server info of carried terminal request to terminal after the Information Request message of terminal transmission.
In the such scheme two, ASN-GW receives after access request that the H-AAA server sends accepts message Access-Accept, the home network DHCPv6 server info that wherein carries counterpart terminal NAI is directly preserved, directly do not pass through terminal, terminal finish the foundation of registration, data channel and link local address obtain with associative operations such as DAD detection after, according to terminal request, it is reached terminal again.
As shown in Figure 6, be the system network architecture schematic diagram that the present invention obtains home network DHCPv6 server info, in this network configuration, comprise access service network gateway and access authentication authentication and accounting server, also comprise:
The terminal iidentification recognition unit is positioned at described authentication and accounting server, is used for the identification terminal sign;
Home network DHCPv6 server info is provided with the unit, be positioned at described authentication and accounting server, be used for recognition result, home network DHCPv6 server info is set in sending to first message of access service network gateway according to described terminal iidentification recognition unit transmission.
Further, this network configuration can also comprise:
Memory cell is positioned at described access service network gateway, is used to store first message of access authentication authentication and accounting server transmission, and according to terminal request, sends it to terminal.
The present invention program provides the new method of obtaining home network DHCPv6 server info in the WiMAX network, improved the flexibility ratio of system, is convenient to expansion.
Avoid original WiMAX network to obtain home network DHCPv6 server info need send multicast message in network shortcoming, improved the WiMAX network performance to a certain extent.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1, a kind of method of obtaining home network DHCPv6 server info is characterized in that:
A, access service network gateway send the access authentication request message according to terminal request to authentication and accounting server, in the described access authentication request message, carry terminal iidentification;
B, authentication and accounting server obtain home network DHCPv6 server info, and send to access service network gateway according to described terminal iidentification;
C, access service network gateway send to terminal with described home network DHCPv6 server info.
2, the method for claim 1 is characterized in that, in the described steps A, described terminal iidentification is the network access identifier of terminal.
3, the method for claim 1 is characterized in that, described step C specifically comprises:
C1, access service network gateway are preserved described home network DHCPv6 server info;
C2, access service network gateway send to terminal according to terminal request with described home network DHCPv6 server info.
4, method as claimed in claim 3 is characterized in that, after described step C1, before the described step C2, also comprises: C11, access service network gateway send the access authentication success message to terminal.
5, method as claimed in claim 4, it is characterized in that, among the described step B, described authentication and accounting server send the request of access to described access service network gateway and accept message, described access request is accepted in the message, carries described home network DHCPv6 server info.
6, the method for claim 1 is characterized in that, described authentication and accounting server are:
Local authentication and accounting server; Or
Visit authentication and accounting server.
7, a kind of system that obtains home network DHCPv6 server info comprises access service network gateway and authentication and accounting server, it is characterized in that, also comprises:
The terminal iidentification recognition unit is positioned at described authentication and accounting server, is used for the identification terminal sign;
Home network DHCPv6 server info is provided with the unit, be positioned at described authentication and accounting server, be used for recognition result, home network DHCPv6 server info is set in sending to first message of access service network gateway according to described terminal iidentification recognition unit transmission.
8, system as claimed in claim 7 is characterized in that, also comprises:
Memory cell is positioned at described access service network gateway, is used to store first message of access authentication and certificate server transmission, and according to terminal request, sends it to terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101241523A CN100542181C (en) | 2005-11-25 | 2005-11-25 | A kind of method and system that obtains home network DHCPv6 server info |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101241523A CN100542181C (en) | 2005-11-25 | 2005-11-25 | A kind of method and system that obtains home network DHCPv6 server info |
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| CN100542181C true CN100542181C (en) | 2009-09-16 |
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