CN100596231C - Implementation method, system and device for allocating target forward address of user device - Google Patents
Implementation method, system and device for allocating target forward address of user device Download PDFInfo
- Publication number
- CN100596231C CN100596231C CN200610106544A CN200610106544A CN100596231C CN 100596231 C CN100596231 C CN 100596231C CN 200610106544 A CN200610106544 A CN 200610106544A CN 200610106544 A CN200610106544 A CN 200610106544A CN 100596231 C CN100596231 C CN 100596231C
- Authority
- CN
- China
- Prior art keywords
- coa
- dhcp
- dhcp server
- distribution
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a realizing method, a system and a device for user equipment (UE) distributing target-conversion access (T-CoA). A target-access router (T-AR) which is used as a proxy server requests a dynamic host computer protocol server (DHCP Server) to distribute T-CoA for the switched UE; and the DHCP Server distributes T-CoA for the UE. The inventive method ensures that the T-AR canbe used as a proxy server to request the DHCP Server to distribute T-CoA for the switched UE, and the DHCP Server distributes T-CoA for the UE to support continuous communication. Obviously, this ensures that the UE can be performed to normal communication after being switched to a T-AR, therefore user satisfaction can be greatly improved.
Description
Technical field
The present invention relates to the communications field, be particularly related to implementation method, system and device that subscriber equipment (UE) distributes target forward address (T-CoA).
Background technology
Along with development of Communication Technique, this (MIPv6) technology of mobile IP sixth version is subject to people's attention just gradually.
At present, when the travelling carriage UE such as (MS) that supports MIPv6 passes through home agent (HA), couple in router (AR) with external network communication, home agent local network entities such as (HA) can distribute home address (HoA) for UE, communication entities such as AR can distribute Care-of Address (CoA) for UE, and HA can preserve the binding information between this HoA and the CoA; Like this, UE can carry HoA, the CoA that is assigned with in when communication in the communication information that sends, and communicates the correct forwarding of information by HA according to described binding information, to guarantee that UE can pass through communication entity and external network proper communications such as HA, AR.
Need to prove that again in view of the mobility that most of UE generally had, UE switches to target couple in router (T-AR) because of moving by current for the service couple in router (S-AR) of its service probably in communication process.In this case, UE need be assigned with new CoA (being commonly called T-CoA); When guaranteeing that UE moves to the service range that T-AR covered, this T-CoA can support UE to carry out follow-up proper communication.
In actual applications, the method for operation that can use two kinds of principles usually is UE distribution T-CoA, and its method of operation respectively as shown in Figure 1 and Figure 2.
Referring to Fig. 1, Fig. 1 is that prior art a kind of is the flow chart of UE distribution T-CoA, and this flow process may further comprise the steps:
Step 101:UE finds new access point (AP) based on link layer mechanism, also obtains the AP sign (AP-ID) of newfound AP; And the AP that UE selects to switch to from the new AP that finds is as target AP (T-AP).
Step 102: by carry out alternately the T-AP-ID among the UE basis AP-ID that obtains, the subnet information of the subnet that the pairing T-AR of acquisition T-AP-ID is administered with S-AR.
Step 103:UE is according to the subnet information configuration T-CoA that obtains.
Step 104:UE sends quick Binding Update (FBU) message to S-AR; Comprise S-AR in this message and be the S-CoA that UE distributed and the described T-CoA of UE configuration, be used to notify S-AR that this S-CoA and T-CoA are bound.
Step 105: whether available in objective network for verifying described T-CoA, S-AR receives from the T-CoA that extracts after the FBU message of UE wherein, and this T-CoA is carried on to switch initiates to send to T-AR in (HI) message.
The availability of the T-CoA that is comprised in the HI message that step 106:T-AR determines to receive, and determining that this T-CoA is that UE distributes new available T-CoA when unavailable.
Step 107:T-AR will confirm to send to S-AR in (HAck) message for the newly assigned available T-CoA of UE is carried on to switch.
Step 108:S-AR receives the HAck message from T-AR, and the T-CoA in this message is carried on quick binding responds in (FBack) message and send to UE.
Step 109:UE accept to be comprised in the FBack message by T-CoA that T-AR distributed.
After this, be that the T-CoA that UE distributed just can support that UE has carried out follow-up proper communication by T-AR.
Referring to Fig. 2, Fig. 2 is that the another kind of prior art is the flow chart of UE distribution T-CoA, and this flow process may further comprise the steps:
Step 201:UE finds new access point (AP) based on link layer mechanism, also obtains the AP sign (AP-ID) of newfound AP; And the AP that UE selects to switch to from the new AP that finds is as target AP (T-AP).
Step 202: by carry out alternately the T-AP-ID among the UE basis AP-ID that obtains, the subnet information of the subnet that the pairing T-AR of acquisition T-AP-ID is administered with S-AR.
Step 203:UE is according to the subnet information configuration T-CoA that obtains.
Quick neighbours' bulletin (FNA) message that step 204:MS will be packaged with FBU message sends to T-AR; Comprise S-AR in the described FBU message and be the S-CoA that UE distributed and the described T-CoA of UE configuration.
The FNA message that step 205:T-AR decapsulation is received sends to S-AR with the FBU message that obtains again to obtain FBU message, and notice S-AR is with the described S-CoA and the T-CoA binding that are comprised in the FBU message.
When step 206:S-AR receives from the FBU message of T-AR, send FBack message to UE, notice UE has finished the binding between S-CoA and the T-CoA.
Step 207:T-AR determines the availability of the T-CoA that comprised in this FBU message after decapsulation obtains FBU message, and is determining that this T-CoA is that UE distributes new available T-CoA when unavailable.
Step 208:T-AR will send to UE for the newly assigned available T-CoA of UE is carried in router advertisement (RA) message.
Step 209:UE accepts the T-CoA that comprised in the RA message.
Step 210:UE is carried on accepted T-CoA in the FBU message and sends to S-AR, and notice S-AR upgrades original S-CoA and the binding relationship between the T-CoA according to this T-CoA.
After this, be that the T-CoA that UE distributed just can support that UE has carried out follow-up proper communication by T-AR.
By Fig. 1, Fig. 2 as seen, when the T-CoA that determines UE self configuration is unavailable, need distribute new available T-CoA for UE.
Yet in present practical application, how protocol contents or concrete operations are to not setting forth for UE distributes new available T-CoA.As seen, when UE switched to T-AR by S-AR, even determine that UE self the configuration T-CoA corresponding with T-AR is unavailable, it was that UE distributes new available T-CoA that any method also can't effectively be provided; This will cause the UE can't proper communication after switching to T-AR, and then seriously reduce user satisfaction.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of implementation method of UE distribution T-CoA that is, guarantees that UE still can proper communication switching to T-AR after, the raising user satisfaction.
Another object of the present invention is to provide a kind of system and device of UE distribution T-CoA that be, guarantee that UE still can proper communication switching to T-AR after, the raising user satisfaction.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of implementation method of UE distribution T-CoA that is, this method may further comprise the steps:
A. target couple in router T-AR obtains the UE distribution T-CoA of server (DHCP Server) for switching with agent identity request dynamic host configuration;
B.DHCP Server is UE distribution T-CoA,
Wherein, described UE is the local UE of described DHCP Server.
In the steps A, the method for described request is:
T-AR sends the DHCP request message that is used to be indicated as UE request T-CoA to DHCP Server.
Comprise in the described DHCP request message and be used to show that T-AR acts on behalf of the UE agent identification of UE request DHCP Server distribution T-CoA.
Among the step B, the described T-CoA that DHCP Server further will distribute sends to UE and preserves.
DHCP Server with the process that described T-CoA sends to UE is:
The described T-CoA that DHCP Server will distribute sends to T-AR, by T-AR this T-CoA is sent to S-AR, by S-AR the T-CoA that receives is sent to UE again.
The T-CoA that sends to T-AR is carried in the DHCP answer message;
The T-CoA that sends to S-AR is carried in the switch acknowledgment message;
The T-CoA that sends to UE is carried on during quick binding receives the response.
DHCP Server with the process that described T-CoA sends to UE is:
The described T-CoA that DHCP Server will distribute sends to T-AR, by T-AR this T-CoA is sent to UE.
The T-CoA that sends to T-AR is carried in the DHCP answer message;
The T-CoA that sends to UE is carried in the router advertisement message.
Steps A comprises: T-AR sends the DHCP request message that is used to be indicated as UE request T-CoA to DHCP Server;
Among the step B, the described T-CoA that DHCP Server further will distribute sends to UE and preserves.
Steps A is to determine that T-CoA that UE distributes voluntarily triggers when unavailable.
Described DHCP Server is predetermined unique one will be the DHCPServer of UE distribution T-CoA;
Perhaps, described DHCP Server is a DHCP Server who is used to UE distribution T-CoA who selects from a plurality of DHCP Server.
Select the method for described DHCP Server to be:
Selecting the minimum DHCP Server conduct of operating load is the DHCP Server of UE distribution T-CoA;
Perhaps, selecting the best DHCP Server conduct of bulletin ability is the DHCPServer of UE distribution T-CoA;
Perhaps, select not comprise in the available address information DHCP Scrver of no available address sign as being the DHCP Server of UE distribution T-CoA.
Described T-AR is accessing business network gate (ASN-GW).
Described UE is the MS that supports MIPv6.
The invention also discloses a kind of system of UE distribution T-CoA that is, this system comprises T-AR and DHCPServer;
Wherein, T-AR, being used for agent identity request DHCP Server is the UE distribution T-CoA that switches;
DHCP Server is used to UE distribution T-CoA,
Wherein, described UE is the local UE of described DHCP Server.
Be provided with the T-CoA proxy module among the T-AR, be used for sending request and be the DHCP Request message of UE distribution T-CoA, and receive DHCP Reply message from DHCP Server to DHCP Server.
Described T-CoA proxy module was further used for before sending described DHCP Request message, and the DHCP that also receives from DHCP Server to DHCP Server transmission DHCP Solicit message announces DHCP Advertise.
Described T-CoA proxy module is further used for when receiving described DHCP Advertise, and selection will be the DHCP Server of UE distribution T-CoA.
Described T-CoA proxy module links to each other with the T-CoA availability detection module that sets in advance in T-AR, this T-CoA availability detection module is used for when determining that T-CoA that UE disposes voluntarily is unavailable, and triggering T-CoA proxy module request DHCP Server is UE distribution T-CoA.
Be provided with the agent allocation module among the described DHCP Server, be used for when the DHCP Request message that receives from T-AR, for UE distribution T-CoA and this T-CoA is sent to T-AR.
Described agent allocation module is further used for receiving the DHCP Solicit message from T-AR, and sends DHCP Advertise to T-AR.
The invention also discloses a kind of device for UE request distribution T-CoA, this device is T-AR; Be provided with the T-CoA proxy module among this T-AR, be used for sending request for the DHCP Request message of UE distribution T-CoA of switching and receive the DHCP Reply message of carrying the T-CoA that distributes for UE from DHCP Server to DHCP Server,
Wherein, described UE is the local UE of described DHCP Server.
Described T-CoA proxy module was further used for before sending described DHCP Request message, sent DHCP Solicit message and received DHCPAdvertise from DHCP Server to DHCP Server.
Described T-CoA proxy module is further used for when receiving described DHCP Advertise, and selection will be the DHCP Server of UE distribution T-CoA.
Described T-CoA proxy module links to each other with the T-CoA availability detection module that sets in advance in T-AR, this T-CoA availability detection module is used for when determining that T-CoA that UE disposes voluntarily is unavailable, and triggering T-CoA proxy module request DHCP Server is UE distribution T-CoA.
The invention also discloses a kind of device of UE distribution T-CoA that is, this device is DHCP Server; Be provided with the agent allocation module among this DHCP Server, be used for when the request from T-AR of receiving is the DHCP Request message of UE distribution T-CoA of switching, for UE distribution T-CoA and this T-CoA is sent to T-AR,
Wherein, described UE is the local UE of described DHCP Server.
Described agent allocation module is further used for receiving the DHCP Solicit message from T-AR, and sends DHCP Advertise to T-AR.
Compared with prior art, provided by the present invention is implementation method, system and the device of UE distribution T-CoA, all guarantee UE by S-AR when T-AR switches, T-AR can be UE distribution T-CoA with agent identity request DHCP Server, DHCP Server and then be used in the T-CoA that supports subsequent communications for UE divides.Obviously, this guarantees that UE still can proper communication after switching to T-AR, thereby can significantly improve user satisfaction.
Description of drawings
Fig. 1 is a kind of for the flow chart of UE distribution T-CoA of prior art;
Fig. 2 is that the another kind of prior art is the flow chart of UE distribution T-CoA;
Fig. 3 be a preferred embodiment of the present invention for the flow chart of UE distribution T-CoA;
Fig. 4 be another preferred embodiment of the present invention be the flow chart of UE distribution T-CoA;
Fig. 5 is that the present invention is the general flow chart of UE distribution T-CoA.
Embodiment
Below in conjunction with drawings and the specific embodiments to the detailed description of the invention.
Provided by the present invention is implementation method, system and the device of UE distribution T-CoA, guarantee that all T-AR can be the UE distribution T-CoA that switches with agent identity request DHCP Server, DHCP Server and then be used in the T-CoA that supports subsequent communications for UE divides.
In actual applications, UE, AP, AR all can have the multiple form of expression, as: in global microwave interoperability (WiMax) system, UE is travelling carriage (MS), and AP is base station (BS), and AR then is ASN-GW.
Below, be example just with the WiMax system, be described as the implementation method of UE distribution T-CoA.
Referring to Fig. 3, Fig. 3 be a preferred embodiment of the present invention be the flow chart of UE distribution T-CoA, this flow process may further comprise the steps:
Step 301:MS finds new BS based on link layer mechanism, also obtains the BS-ID of newfound BS; And the BS that MS selects to switch to from the new BS that finds is as T-BS.
Step 302: by carry out alternately the T-BS-ID among the MS basis BS-ID that obtains, the subnet information of the subnet that the pairing T-ASN-GW of acquisition T-BS-ID is administered with S-ASN-GW.
Step 303:MS is according to the subnet information configuration T-CoA that obtains.
Step 304:MS sends FBU message to S-ASN-GW; Comprise S-ASN-GW in this message and be the S-CoA that MS distributed and the described T-CoA of MS configuration, be used to notify S-ASN-GW that this S-CoA and T-CoA are bound.
Step 305: whether available in objective network for verifying described T-CoA, S-ASN-GW receives from the T-CoA that extracts after the FBU message of MS wherein, and this T-CoA is carried in the HI message sends to T-ASN-GW.
The availability of the T-CoA that is comprised in the HI message that step 306:T-ASN-GW application prior art is determined to receive.Concrete definite method has multiple, as: when T-ASN-GW found that by retrieval the T-CoA that is comprised in the HI message has been assigned to other MS, T-ASN-GW determined that the T-CoA that is comprised in the described HI message is invalid; Perhaps, when T-ASN-GW receives that requiring it is MS initiatively during the message of distribution T-CoA, T-ASN-GW determines that the T-CoA that is comprised in the described HI message is invalid.
Step 307: when the T-CoA that is comprised in the described HI message of determining to receive is unavailable, T-ASN-GW is that the multicast address of ALL_DHCP_Relay_Agent_and_Server sends DHCP and obtains (DHCP Solicit) message to the address, and this message can be received by pairing one or more DHCP Server of described multicast address.
Need to prove that present DHCP Server has the ability of distributing CoA for MS, but these MS must be the local MS of DHCP Server; Otherwise even DHCP Server has received the CoA request for allocation at nonlocal MS, DHCP Server can not carry out any operations such as CoA distribution at this other places MS yet.
In view of this, T-ASN-GW must comprise the special content that DHCP Server can discern in the DHCP Solicit message that DHCP Server is sent, assurance receives that the DHCP Server of this DHCP Solicit message can carry out alternately with T-ASN-GW, to finish the operation into MS distribution T-CoA smoothly.Therefore, carry the MS agent identification usually in the described DHCP Solicit message, acting on behalf of MS request DHCP Server distribution T-CoA to show T-ASN-GW.
Have, T-ASN-GW can also further carry quick answer sign in DHCP Solicit message again, makes the DHCP Server that receives this DHCP So1icit message reply message to T-ASN-GW as early as possible when parsing this answer sign fast.
Step 308: the DHCP Server that receives DHCP Solicit message sends DHCP bulletin (DHCP Advertise) to T-ASN-GW, includes the working status parameter such as available address information, operating load, bulletin ability of DHCP Server in this DHCP bulletin.
Step 309:T-ASN-GW selects one to be the DHCP Server of MS distribution T-CoA according to the working status parameter that is comprised in the DHCP bulletin of receiving.
Described system of selection has multiple, as: T-ASN-GW selects the minimum DHCPServer of operating load, as the DHCP Server that is MS distribution T-CoA; Perhaps, T-ASN-GW selects the best DHCP Server of bulletin ability, as the DHCP Server that is MS distribution T-CoA; T-ASN-GW selects not comprise in the available address information DHCPServer of no available address sign, as the DHCP Server that is MS distribution T-CoA.
Described bulletin ability is normally embodied by the advertised parameter that is comprised in the described working status parameter.
Step 310:T-ASN-GW sends DHCP request (DHCP Request) message that is used to be indicated as MS request T-CoA to the described DHCP Server that selects.
Particularly, must comprise the special content that DHCP Server can discern in the described DHCP Request message, assurance receives that the DHCP Server of this DHCP Solicit message can carry out alternately with T-ASN-GW, to finish the operation into MS distribution T-CoA smoothly; Therefore, carry the MS agent identification usually in this DHCPRequest message, acting on behalf of MS request DHCP Server distribution T-CoA to show T-ASN-GW.
Step 311: when receiving the DHCP Request message from T-ASN-GW, DHCP Server is MS distribution T-CoA, and the relevant information that T-CoA comprised of being distributed is carried on DHCP answers in (DHCP Reply) message and send to T-ASN-GW.
In actual applications, the described relevant information that T-CoA comprised can be called T-CoA information, its content generally includes: T-CoA address itself, T-CoA configuration information, available name server (DNS) tabulation, NTP (Network Time Protocol) (NTP) tabulation etc.
Step 312: when receiving the DHCP Reply message from DHCP Server, T-ASN-GW extracts the T-CoA that is wherein comprised, and this T-CoA is carried in the HAck message sends to S-ASN-GW.
Step 313: when receiving the HAck message from T-ASN-GW, S-ASN-GW extracts the T-CoA that is wherein comprised, and this T-CoA is carried in the FBack message sends to MS; And, the described T-CoA that S-ASN-GW also will extract with bind again for S-CoA that MS distributed.
The T-CoA that is distributed by DHCP Server that step 314:UE accepts to be comprised in the FBack message, and in follow-up communication, use this T-CoA.
After this, be that the T-CoA that UE distributed just can support that UE has carried out follow-up proper communication by DHCP Server.
In actual applications, if having chosen in advance, T-ASN-GW to be the DHCP Server of MS distribution T-CoA, so not execution in step 307 to step 309, but directly enter step 310: when determining that T-CoA that MS distributes voluntarily is unavailable, directly send described DHCP Request message to this DHCP Server that chooses in advance by step 306.Have again, if have only a DHCPServer to send described DHCP Advertise to T-ASN-GW, execution in step 309 not so, but directly enter step 310: when the described DHCP Advertise that receives from certain DHCP Server, directly send described DHCP Request message to this DHCP Server by step 308.
As seen from Figure 3, when MS by S-ASN-GW when T-ASN-GW switches, if determine that the T-CoA that MS disposes voluntarily is unavailable, T-ASN-GW can be MS distribution T-CoA with agent identity request DHCPServer so, DHCP Server and then divide the T-CoA that is used in the support subsequent communications for MS.Obviously, this guarantees that MS still can proper communication after switching to T-ASN-GW, thereby can significantly improve user satisfaction.
Referring to Fig. 4, Fig. 4 be another preferred embodiment of the present invention be the flow chart of UE distribution T-CoA, this flow process may further comprise the steps:
Step 401:MS finds new BS based on link layer mechanism, also obtains the BS-ID of newfound BS; And the BS that MS selects to switch to from the new BS that finds is as T-BS.
Step 402: by carry out alternately the T-BS-ID among the MS basis BS-ID that obtains, the subnet information of the subnet that the pairing T-ASN-GW of acquisition T-BS-ID is administered with S-ASN-GW.
Step 403:MS is according to the subnet information configuration T-CoA that obtains.
The FNA message that step 404:MS will be packaged with FBU message sends to T-ASN-GW; Comprise S-ASN-GW in the described FBU message and be the S-CoA that MS distributed and the described T-CoA of MS configuration.
The FNA message that step 405:T-ASN-GW decapsulation is received sends to S-ASN-GW with the FBU message that obtains again to obtain FBU message, and notice S-ASN-GW is with the described S-CoA and the T-CoA binding that are comprised in the FBU message.
When step 406:S-ASN-GW receives from the FBU message of T-ASN-GW, send FBack message to MS, notice MS has finished the binding between S-CoA and the T-CoA.
Step 407:T-ASN-GW determines the availability of the T-CoA that comprised in this FBU message after decapsulation obtains FBU message, and is determining that this T-CoA is that MS distributes new available T-CoA when unavailable.
Particularly, the concrete grammar of determining the T-CoA availability has multiple, as: when the T-CoA that is comprised when the FBU message that encapsulates in the FNA message as described in T-ASN-GW finds by retrieval had been assigned to other MS, T-ASN-GW determined that the T-CoA that is comprised in the described FBU message is invalid; Perhaps, when T-ASN-GW receives that requiring it is MS initiatively during the message of distribution T-CoA, T-ASN-GW determines that the T-CoA that is comprised in the described FBU message is invalid.
Step 408: when the T-CoA that is comprised in determining described FBU message is unavailable, T-ASN-GW is the multicast address transmission DHCP Solicit message of ALL_DHCP_Relay_Agent_and_Server to the address, and this message can be received by pairing one or more DHCP Server of described multicast address.
Need to prove, T-ASN-GW must comprise the special content that DHCP Server can discern in the DHCP Solicit message that DHCP Server is sent, assurance receives that the DHCP Server of this DHCP Solicit message can carry out alternately with T-ASN-GW, to finish the operation into MS distribution T-CoA smoothly.Therefore, carry the MS agent identification usually in the described DHCP Solicit message, acting on behalf of MS request DHCP Server distribution T-CoA to show T-ASN-GW.
Have, T-ASN-GW can also further carry quick answer sign in DHCP Solicit message again, makes the DHCP Server that receives this DHCP Solicit message reply message to T-ASN-GW as early as possible when parsing this answer sign fast.
Step 409: the DHCP Server that receives DHCP Solicit message sends DHCP Advertise to T-ASN-GW, includes the working status parameter such as available address information, operating load, bulletin ability of DHCP Server among this DHCP Advertise.
Step 410:T-ASN-GW selects one to be the DHCP Server of MS distribution T-CoA according to the working status parameter that is comprised in the DHCP bulletin of receiving.
Described system of selection is identical with the corresponding system of selection in the step 309.
Step 411:T-ASN-GW sends the DHCP Request message that is used to be indicated as MS request T-CoA to the described DHCP Server that selects.
Particularly, must comprise the special content that DHCP Server can discern in the described DHCP Request message, assurance receives that the DHCP Server of this DHCP Solicit message can carry out alternately with T-ASN-GW, to finish the operation into MS distribution T-CoA smoothly; Therefore, carry the MS agent identification usually in this DHCPRequest message, acting on behalf of MS request DHCP Server distribution T-CoA to show T-ASN-GW.
Step 412: when receiving the DHCP Request message from T-ASN-GW, DHCP Server is MS distribution T-CoA, and the T-CoA information that T-CoA comprised of being distributed is carried in the DHCPReply message sends to T-ASN-GW.
Step 413: when receiving the DHCP Reply message from DHCP Server, T-ASN-GW extracts the T-CoA that is wherein comprised, and this T-CoA is carried in the RA message sends to MS.
The T-CoA that is distributed by DHCP Server that step 414:MS accepts to be comprised in the RA message, and in follow-up communication, use this T-CoA.
Step 415:UE is carried on accepted T-CoA in the FBU message and sends to S-ASN-GW, and notice S-ASN-GW upgrades original S-CoA and the binding relationship between the T-CoA according to this T-CoA.
After this, be that the T-CoA that UE distributed just can support that UE has carried out follow-up proper communication by DHCP Server.
In actual applications, if having chosen in advance, T-ASN-GW to be the DHCP Server of MS distribution T-CoA, so not execution in step 408 to step 410, but directly enter step 411: when determining that T-CoA that MS distributes voluntarily is unavailable, directly send described DHCP Request message to this DHCP Server that chooses in advance by step 407.Have again, if have only a DHCPServer to send described DHCP Advertise to T-ASN-GW, execution in step 410 not so, but directly enter step 411: when the described DHCP Advertise that receives from certain DHCP Server, directly send described DHCP Request message to this DHCP Server by step 409.
As seen from Figure 4, when MS by S-ASN-GW when T-ASN-GW switches, if determine that the T-CoA that MS disposes voluntarily is unavailable, T-ASN-GW can be MS distribution T-CoA with agent identity request DHCPServer so, DHCP Server and then divide the T-CoA that is used in the support subsequent communications for MS.Obviously, this guarantees that MS still can proper communication after switching to T-ASN-GW, thereby can significantly improve user satisfaction.
In conjunction with above-mentioned Fig. 3, Fig. 4, can the basic thought that the present invention is UE distribution T-CoA very clearly be described out with Fig. 5.Referring to Fig. 5, Fig. 5 is that the present invention is the general flow chart of UE distribution T-CoA, and this flow process may further comprise the steps:
Step 510: to the UE that T-AR switches, obtain the subnet information of the subnet that T-AR administers by S-AR, and according to the subnet information configuration T-CoA that obtains.
Step 520:UE sends to T-AR with the T-CoA that self disposes, and is determined the availability of this T-CoA by T-AR.
Step 530: when determining that T-CoA that UE is disposed is unavailable, T-AR is UE distribution T-CoA with agent identity request DHCP Server.
Step 540:DHCP Server is UE distribution T-CoA, and the T-CoA that is distributed is sent to UE.
Step 550:UE accepts the T-CoA that DHCP Server is distributed.
In Fig. 5, step 530 is the most key steps, and this step guarantees that DHCP Server can divide the T-CoA that is used in the support subsequent communications for the UE that switches.
Need to prove at last: AR's such as DHCP Server and ASN-GW is mutual, can directly carry out between these two entities, also can transmit by DHCP switching agency (DHCP Relay Agent).
In order to guarantee that T-AR is when determining that T-CoA that UE is disposed is unavailable, can be UE distribution T-CoA with agent identity request DHCP Server, the T-CoA proxy module need be set, and this T-CoA proxy module links to each other with the T-CoA availability detection module that has been arranged among the T-AR at present in T-AR.When receiving the T-CoA that UE disposes voluntarily and determining that this T-CoA is unavailable, T-CoA availability detection module sends the unavailable message of T-CoA to the T-CoA proxy module; Then carry out aforementioned mentioned alternately with DHCP Server when the T-CoA proxy module is received this message, request DHCPServer is UE distribution T-CoA.
Describedly may comprise alternately: send described DHCP Request message, receive described DHCPReply message, can also before sending described DHCP Request message, further send DHCPSolicit message and receive described DHCP Advertise, even when receiving this DHCP Advertise, further carry out described DHCP Server selection operation.
Certainly, T-AR can also further send described Hack message and described RA message.
In like manner, in order to guarantee that DHCP Server can be UE distribution T-CoA according to the request of T-AR, the agent allocation module need be set, and this agent allocation module can link to each other with the T-CoA agent allocation module that has been arranged among the DHCP Server at present in DHCP Server.When the DHCP Solicit message that receives from T-AR, T-CoA agent allocation module sends described DHCPAdvertise to T-AR; When the DHCP Request message that receives from T-AR, T-CoA agent allocation module then sends described DHCP Reply message to T-AR.
Have again, that comprised in this DHCP Reply message is the T-CoA that UE distributed, can distribute voluntarily by T-CoA agent allocation module, also can be that it is connected by the request of T-CoA agent allocation module, be arranged at T-CoA module assigns among the DHCP Server at present, as: when receiving the DHCP Request message from T-AR, T-CoA agent allocation module sends the T-CoA request for allocation to the T-CoA distribution module; Be UE distribution T-CoA when the T-CoA distribution module is received this request and send to T-CoA agent allocation module; When T-CoA agent allocation module is received from the T-CoA of T-CoA distribution module, this T-CoA is carried in the DHCP Reply message sends to T-AR.
By the above as can be seen, provided by the present invention is implementation method, system and the device of UE distribution T-CoA, UE by S-AR when T-AR switches, if the T-CoA that definite UE disposes voluntarily is unavailable, T-AR can be UE distribution T-CoA with agent identity request DHCP Server so, DHCP Server and then be used in the T-CoA that supports subsequent communications for UE divides.Obviously, this guarantees that UE still can proper communication after switching to T-AR, thereby can significantly improve user satisfaction.
Claims (27)
1, a kind of implementation method for user equipment (UE) distribution target forward address T-CoA is characterized in that this method may further comprise the steps:
A. to obtain server DHCP Server with agent identity request dynamic host configuration be the UE distribution T-CoA that switches to target couple in router T-AR;
B.DHCP Server is UE distribution T-CoA,
Wherein, described UE is the local UE of described DHCP Server.
2, the method for claim 1 is characterized in that, in the steps A, the method for described request is:
T-AR sends the DHCP request message that is used to be indicated as UE request T-CoA to DHCP Server.
3, method as claimed in claim 2 is characterized in that, comprises in the described DHCP request message to be used to show that T-AR acts on behalf of the UE agent identification of UE request DHCP Server distribution T-CoA.
4, the method for claim 1 is characterized in that, among the step B, the described T-CoA that DHCP Server further will distribute sends to UE and preserves.
5, method as claimed in claim 4 is characterized in that, DHCP Server with the process that described T-CoA sends to UE is:
The described T-CoA that DHCP Server will distribute sends to T-AR, by T-AR this T-CoA is sent to current service couple in router S-AR for the UE service, by S-AR the T-CoA that receives is sent to UE again.
6, method as claimed in claim 5 is characterized in that:
The T-CoA that sends to T-AR is carried in the DHCP answer message;
The T-CoA that sends to S-AR is carried in the switch acknowledgment message;
The T-CoA that sends to UE is carried on during quick binding receives the response.
7, method as claimed in claim 4 is characterized in that, DHCP Server with the process that described T-CoA sends to UE is:
The described T-CoA that DHCP Server will distribute sends to T-AR, by T-AR this T-CoA is sent to UE.
8, method as claimed in claim 7 is characterized in that:
The T-CoA that sends to T-AR is carried in the DHCP answer message;
The T-CoA that sends to UE is carried in the router advertisement message.
9, the method for claim 1 is characterized in that:
Steps A comprises: T-AR sends the DHCP request message that is used to be indicated as UE request T-CoA to DHCP Server;
Among the step B, the described T-CoA that DHCP Server further will distribute sends to UE and preserves.
As each described method of claim 1 to 9, it is characterized in that 10, steps A is to determine that T-CoA that UE distributes voluntarily triggers when unavailable.
As each described method of claim 1 to 9, it is characterized in that 11, described DHCP Server is predetermined unique one will be the DHCP Server of UE distribution T-CoA;
Perhaps, described DHCP Server is a DHCP Server who is used to UE distribution T-CoA who selects from a plurality of DHCP Server.
12, method as claimed in claim 11 is characterized in that, selects the method for described DHCP Server to be:
Selecting the minimum DHCP Server conduct of operating load is the DHCP Server of UE distribution T-CoA;
Perhaps, selecting the best DHCP Server conduct of bulletin ability is the DHCPServer of UE distribution T-CoA;
Perhaps, select not comprise in the available address information DHCP Server of no available address sign as being the DHCP Server of UE distribution T-CoA.
13, the method for claim 1 is characterized in that, described T-AR is accessing business network gate ASN-GW.
14, the method for claim 1 is characterized in that, described UE is a mobile station MS of supporting this MIPv6 of mobile IP sixth version.
15, a kind of system for UE distribution target forward address T-CoA is characterized in that this system comprises target couple in router T-AR and DHCP Server;
Wherein, T-AR, being used for agent identity request DHCP Server is the UE distribution T-CoA that switches;
DHCP Server is used to UE distribution T-CoA,
Wherein, described UE is the local UE of described DHCP Server.
16, system as claimed in claim 15, it is characterized in that, be provided with the T-CoA proxy module among the T-AR, be used for sending request and be the DHCP Request message of UE distribution T-CoA, and receive DHCP Reply message from DHCP Server to DHCP Server.
17, system as claimed in claim 16, it is characterized in that, described T-CoA proxy module was further used for before sending described DHCP Request message, and the DHCP that also receives from DHCP Server to DHCP Server transmission DHCPSolicit message announces DHCP Advertise.
18, system as claimed in claim 17 is characterized in that, described T-CoA proxy module is further used for when receiving described DHCP Advertise, and selection will be the DHCP Server of UE distribution T-CoA.
19, as each described system of claim 15 to 18, it is characterized in that, described T-CoA proxy module links to each other with the T-CoA availability detection module that sets in advance in T-AR, this T-CoA availability detection module is used for when determining that T-CoA that UE disposes voluntarily is unavailable, and triggering T-CoA proxy module request DHCP Server is UE distribution T-CoA.
20, as each described system of claim 15 to 18, it is characterized in that, be provided with the agent allocation module among the described DHCPServer, be used for when the DHCP Request message that receives from T-AR, for UE distribution T-CoA and this T-CoA is sent to T-AR.
21, system as claimed in claim 20 is characterized in that, described agent allocation module is further used for receiving the DHCP Solicit message from T-AR, and sends DHCPAdvertise to T-AR.
22, a kind of device for UE request distribution target forward address T-CoA, this device is target couple in router T-AR; It is characterized in that, be provided with the T-CoA proxy module among this T-AR, be used for sending request for the DHCP Request message of UE distribution T-CoA of switching and receive the DHCP Reply message of carrying the T-CoA that distributes for UE from DHCP Server to DHCP Server
Wherein, described UE is the local UE of described DHCP Server.
23, device as claimed in claim 22, it is characterized in that, described T-CoA proxy module was further used for before sending described DHCP Request message, and the DHCP that also receives from DHCP Server to DHCP Server transmission DHCPSolicit message announces DHCP Advertise.
24, device as claimed in claim 23 is characterized in that, described T-CoA proxy module is further used for when receiving described DHCP Advertise, and selection will be the DHCP Server of UE distribution T-CoA.
25, as each described device of claim 22 to 24, it is characterized in that, described T-CoA proxy module links to each other with the T-CoA availability detection module that sets in advance in T-AR, this T-CoA availability detection module is used for when determining that T-CoA that UE disposes voluntarily is unavailable, and triggering T-CoA proxy module request DHCP Server is UE distribution T-CoA.
26, a kind of device for UE distribution target forward address T-CoA, this device is DHCPServer; It is characterized in that, be provided with the agent allocation module among this DHCP Server, be used for when the request from target couple in router T-AR of receiving is the DHCPRequest message of UE distribution T-CoA of switching, for UE distribution T-CoA and this T-CoA is sent to T-AR
Wherein, described UE is the local UE of described DHCP Server.
27, device as claimed in claim 26 is characterized in that, described agent allocation module is further used for receiving the DHCP Solicit message from T-AR, and sends DHCP bulletin DHCP Advertise to T-AR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610106544A CN100596231C (en) | 2006-07-14 | 2006-07-14 | Implementation method, system and device for allocating target forward address of user device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610106544A CN100596231C (en) | 2006-07-14 | 2006-07-14 | Implementation method, system and device for allocating target forward address of user device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101106811A CN101106811A (en) | 2008-01-16 |
| CN100596231C true CN100596231C (en) | 2010-03-24 |
Family
ID=39000432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610106544A Expired - Fee Related CN100596231C (en) | 2006-07-14 | 2006-07-14 | Implementation method, system and device for allocating target forward address of user device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100596231C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101730151B (en) * | 2009-06-19 | 2012-05-09 | 中兴通讯股份有限公司 | Method, system and access service network gateway for realizing DHCP mode negotiation |
-
2006
- 2006-07-14 CN CN200610106544A patent/CN100596231C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101106811A (en) | 2008-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102106166B (en) | Anchoring services of a mobile station attached to a first service domain at a home agent in a second service domain | |
| AU2010200993B2 (en) | Methods and apparatus for the utilization of core based nodes for state transfer | |
| CN101170808B (en) | Switching method and system for heterogenous access systems | |
| CN100558076C (en) | Mobile terminal apparatus and changing method thereof | |
| CN101345998B (en) | Access network switch method, anchor point management equipment, mobile access equipment | |
| CN102273254B (en) | Tunneling-based mobility support equipment and method | |
| CN100471323C (en) | Method for acquiring system information as switching residence | |
| CN1307851C (en) | Method for reserving a new care of address (COA) in advance to achieve a fast handover | |
| US20100103876A1 (en) | Mobile terminal and communication management device | |
| KR20070048109A (en) | Apparatus and method for supporting fast mobility ip with link identifier prefix in wireless communication system | |
| CN101848443A (en) | Communication service switching method, network system and interworking function entity | |
| CN101621785A (en) | Registration, communication and switching method of mobile nodes and device thereof | |
| CN101674628A (en) | Route reselection method and radio network controller | |
| EP1883254A1 (en) | Access router device, mobility control system, and mobility control method | |
| CN100455111C (en) | Method and system of realizing R3 interface shift based on resource optimization | |
| CN101026546A (en) | Method for realizing packet data session | |
| CN101595676A (en) | Based on network handover control mechanism | |
| US20040179489A1 (en) | Mobile communications system, mobile communications method, server, transfer device, and mobile communications terminal | |
| US20070133463A1 (en) | Communication handover method, communication handover program, and communication system | |
| CN100596229C (en) | Method for apprizing the binding result of the target network address and mobile user terminal | |
| KR20070097858A (en) | Packet switched radio telecommunication system supporting lossless hard hand over and method for hard hand over | |
| CN100596231C (en) | Implementation method, system and device for allocating target forward address of user device | |
| CN101047996B (en) | Method, system for acquiring target network transmission address information and its application | |
| CN101998566B (en) | Method and device for switching mobile access gateway (MAG) in proxy mobile Internet protocol (PMIP) | |
| KR20080050280A (en) | Method and system for supporting seamless handover using multiple wireless interface in mobile terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20140714 |
|
| EXPY | Termination of patent right or utility model |