CN101064716B - Method for dynamic host configuring protocol agent or server migration when the terminal is moving - Google Patents
Method for dynamic host configuring protocol agent or server migration when the terminal is moving Download PDFInfo
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- CN101064716B CN101064716B CN2006100764735A CN200610076473A CN101064716B CN 101064716 B CN101064716 B CN 101064716B CN 2006100764735 A CN2006100764735 A CN 2006100764735A CN 200610076473 A CN200610076473 A CN 200610076473A CN 101064716 B CN101064716 B CN 101064716B
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Abstract
The invention provides a dynamic host configuration protocol DHCP surrogate/server shift method when terminal shifts: the service meeting network and the target meeting network arranges whether DHCP surrogate/server shift is needed, if it is needed, the service meeting network sends relative context of mobile terminal DHCP surrogate/server; the target meeting network redistributed the mobile terminal address based on relative context of mobile terminal DHCP surrogate/server. The invention sends DHCP shift indication to the target meeting network, the DHCP updating message sent to the DHCP surrogate/server is passed, and DHCP is redistributed based on context of the DHCP surrogate/server, so when DHCP surrogate/server shifts, there is no need to send information to DHCP surrogate/server, the DHCP surrogate/server in target network provides DHCP service, and it becomes new DHCP surrogate/server.
Description
Technical field
The present invention relates to the wireless access technology field, relate in particular to the method for a kind of terminal dynamic host configuring protocol agent or server migration when moving.
Background technology
DHCP (Dynamic Host Configure Protocol, DHCP) technology is what to be used for to IP (Intemet Protocol, Internet protocol) terminal dynamic assignment IP address.For the same IP address that keeps DHCP proxy/server-assignment can continue to use, the IP that the DHCP agreement provides renewal (renew) and (rebind) mechanism of heavily binding guarantees that DHCP affair device is distributed can be upgraded by terminal and continue to use.In the update mechanism, the DHCP renew message that terminal is sent is unicast messages, and the destination address in this message is the address of the DHCP proxy/server of terminal grappling.In heavy binding mechanism, the DHCP rebind message that terminal is sent is broadcast, and the destination address in this message is a broadcast address.Detailed introduction about DHCP can be with reference to RFC2131.
Having introduced DHCP mechanism at present in WiMAX (Worldwide Interoperability for Microwave Access, the authentication of inserting of microwave whole world interoperability) system distributes for portable terminal and keeps IP address and other host configuration information.But because DHCP comes from the fixedly technology of IP network, make that using DHCP in WiMAX exists certain problem, special after portable terminal switches, visit relatively difficulty of its grappling Dynamic Host Configuration Protocol server at other access network, interrupting may appear in the DHCP Signalling exchange of portable terminal.
In order to address this problem, existing program proposes and Dynamic Host Configuration Protocol server can be moved.But because after it does not consider that Dynamic Host Configuration Protocol server ground moves, portable terminal does not also know that migration has taken place Dynamic Host Configuration Protocol server, owing to the path between ASN when the DHCP renewal takes place may exist, this moment, portable terminal still can send update request to DHCP proxy/server of its former grappling so; And after Dynamic Host Configuration Protocol server moves, if following together, do not move PMIP (proxy-mobile IP) Client, regulation DHCP proxy/server and the interface between the PMIP Client according to present WiMAX is the hypothesis of internal interface so, also need to redefine the interface between DHCP proxy/server and the PMIP Client, finish the migration of complete and effective DHCP proxy/server.
Summary of the invention
The method of dynamic host configuring protocol agent/server migration when the problem to be solved in the present invention has been to provide a kind of terminal to move, after portable terminal moves on to new objective network in the solution prior art, still use former DHCP proxy/server and cause operating lag, the defective that flow increases between access network.
For reaching above purpose, the method for dynamic host configuration protocol DHCP proxy/servers migration when the invention provides a kind of terminal and moving may further comprise the steps:
A, service Access Network and target access network consult whether to need to carry out DHCP proxy/server migration, if when affirmation need be carried out DHCP proxy/server migration, and execution in step B;
B, service Access Network transmit portable terminal DHCP proxy/server related context to target access network;
C, target access network heavily distribute this mobile terminal address according to described DHCP proxy/server related context.
Steps A further comprises:
A1, service Access Network send DHCP proxy/server migration indication to target access network;
A2, target access network send DHCP proxy/server migration response to the service Access Network.
Also comprise after the steps A 1:
Target access network shields the relevant signaling message of DHCP proxy/server that portable terminal sends to the former grappling of portable terminal according to the migration indication.
The described migrations response of steps A 2 comprises agrees response or refusal response, when target access network when the service Access Network sends DHCP proxy/server migration and agrees response, change step B; When target access network when the service Access Network sends DHCP proxy/server migration refusal response, handle by existing procedure.
Also comprise after the step C:
D, target access network send the migration acknowledge message to the service Access Network, comprise the transition process report in this message.
Comprise in DHCP proxy among the step B/server related context: the DHCP proxy/server address of mobile terminal identification and/or the grappling of this portable terminal institute and the DHCP proxy/server of this grappling are for this portable terminal institute's IP address allocated and/or be life cycle of this IP address of this portable terminal distribution.
The related context that also comprises proxy mobile IP customer terminal among the step B.
The related context of described proxy mobile IP customer terminal and DCHP proxy/servers context transmit simultaneously or transmit respectively.
Described proxy mobile IP customer terminal related context comprises: the home IP address that the home agent of mobile terminal identification and this portable terminal distributes for this portable terminal and/or be the life cycle and/or the relevant MIP set of cipher key of this portable terminal of this home IP address of this portable terminal distribution.
When the proxy mobile IP customer terminal of portable terminal and the DHCP proxy/server of this portable terminal are not in the same network and need that path is connected between net, then between new DHCP proxy/server and proxy mobile IP customer terminal, trigger the dispose procedure of the contextual information relevant each other with portable terminal by signaling control mechanism after the portable terminal moving process is finished.
Described message dispose procedure comprises: the release request of DHCP, response, affirmation; And release request, response, the affirmation of proxy mobile IP customer terminal.
It is one of following that the step that described service Access Network sends migration instruction and/or related context to target access network comprises:
When portable terminal switched, DHCP proxy/server context that the service Access Network of terminal carries DHCP proxy/server migration indication and/or portable terminal grappling by handoff request message sent to target access network; Or DHCP proxy/server context that the service Access Network of portable terminal carries the portable terminal grappling by switch acknowledgment message sends to target access network;
When portable terminal is set up the R4 data path in the moving process between accessing business network ASN, carry DHCP proxy/server migration indication and/or DHCP proxy/server context by the request of setting up of R4 data path; Or set up response by the R4 data path and carry DHCP proxy/server context;
When portable terminal discharges the interim R4 data path of setting up in the moving process between ASN, carry DHCP migration indication and/or DHCP related context in the process of the data path by discharging interim foundation; Or in the response message that discharges this interim data path of setting up, carry the DHCP related context.
Compared with prior art, the present invention has the following advantages:
The present invention is by sending DHCP migration indication to target access network, target access network is ignored the DHCP updating message of sending from portable terminal that is sent to its former grappling DHCP proxy/server, and when this portable terminal initiation DHCP heavily binds, carrying out DHCP according to the relevant information that comprises in its DHCP related context that transmits in handoff procedure heavily distributes, when making Dynamic Host Configuration Protocol server that migration take place, DHCP proxy/the server that can not repeat to its former grappling sends information, but provide DHCP service, and become the DHCP proxy/server of new grappling by the DHCP proxy/server of new target access network.
In addition, the present invention proposes PMIP Client to be moved when DHCP proxy/server migration, has avoided redefining the interface between DHCP proxy/server and the PMIP Client.If the two is migration together, and when causing therebetween interface to become external interface, the present invention has defined the mutual interactive signaling of a cover.
Description of drawings
The implementation method flow chart of dynamic host configuration protocol DHCP proxy/servers migration when Fig. 1 terminal of the present invention moves;
Fig. 2 is a specific embodiment realization flow of the present invention figure;
Fig. 3 be among the present invention in the mobile terminal switching process to the conveying flow figure of the DHCP proxy/server context of its grappling.
Embodiment
The implementation method of dynamic host configuration protocol DHCP proxy/servers migration may further comprise the steps as shown in Figure 1 when a kind of terminal of the present invention moved:
Step s101, service Access Network and target access network consult whether need to carry out DHCP proxy/server migration, if desired, then change step s102, otherwise, handle by existing procedure.This negotiations process further comprises: the service Access Network sends DHCP proxy/server migration indication to target access network; Target access network shielding portable terminal sends to the relevant signaling message of DHCP proxy/server of the former grappling of portable terminal; Target access network sends DHCP proxy/server migration response to the service Access Network.When target access network when the service Access Network sends DHCP proxy/server migration and agrees response, change step s102; When target access network when the service Access Network sends DHCP proxy/server migration refusal response, handle by existing procedure.
Step s102, the service Access Network transmits portable terminal DHCP proxy/server related context to target access network.Wherein, comprise in DHCP proxy/server related context: the DHCP proxy/server address of mobile terminal identification and/or the grappling of this portable terminal institute, the DCHP proxy/servers of this grappling are for this portable terminal institute's IP address allocated and/or for life cycle of this IP address of this portable terminal distribution etc.In addition, when sending DHCP proxy/server related context, can also transmit proxy-mobile IP client's related context, comprise: the life cycle of the home IP address that the home agent of mobile terminal identification, this portable terminal distributes for this portable terminal and/or this home IP address of distributing for this portable terminal and/or this portable terminal MIP cipher code set etc. of being correlated with.
Wherein, proxy mobile IP customer terminal related context and DHCP proxy/server context transmit simultaneously or transmit respectively.Owing to send respectively, when the proxy mobile IP customer terminal of portable terminal and the DHCP proxy/server of this portable terminal are not in the same network and need that path is connected between net, then between new DHCP proxy/server and proxy mobile IP customer terminal, trigger the dispose procedure of portable terminal related context each other by signaling control mechanism after the portable terminal moving process is finished.The message dispose procedure comprises: the request of the release of DHCP, response, affirmation; And request, response, the affirmation of the release of PMIP.
Step s103, target access network heavily distributes this mobile terminal address according to described DHCP proxy/server related context.
Can also comprise after the step s103: target access network sends the migration acknowledge message to the service Access Network, comprises the transition process report in this message.
Especially, can directly enter the s103 step, give tacit consent to implicit expression of this step and require objective network to carry out request and indication that DHCP moves.
The present invention is described in detail below in conjunction with specific embodiment:
An instantiation may further comprise the steps as shown in Figure 2:
Step s201, when under certain trigger condition when carrying out switching between the Access Network (as judge terminal), send DHCP migration indication to target access network by the network that stores terminal D HCP information (as being the current service Access Network that service is provided for terminal).Come the notification target Access Network whether to need to abandon the DHCP update request of the portable terminal that new migration comes by this indication or other any condition (as receiving the DHCP context of being come) by migration, when target access network is received corresponding to the DHCP of certain portable terminal migration indication, target access network needs and will ignore the DHCP updating message of sending from portable terminal that is sent to its former grappling DHCP proxy/server, this indication can be the part of DHCP migration message, it also can be the contextual part of DHCP, also can send separately, wherein, the DHCP migration is designated as DHCP_Relocation.Indicator (Boolean type variable).
Step s202, target access network sends DHCP migration response message to the service Access Network, agrees to carry out the DHCP migration, and this step also can be selected certainly.
Step s203, the service Access Network carries out DHCP according to the relevant information (as shown in table 1) that comprises in its DHCP related context that transmits and heavily distributes to the related context of target access network transmission portable terminal DHCP in handoff procedure.Information in the table 1 can place a message to send target access network to separately, also can place original certain message to send target access network to.
Table 1:
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| Anchor?DHCP Proxy/Server | The Dynamic Host Configuration Protocol server address of this portable terminal institute grappling | Not |
| IP?address | This grappling DHCP proxy/server is its IP address allocated | Be |
| IP?address?lifetime | The life cycle of this IP address of distributing for this portable terminal | Not |
Step s204, target access network sends the migration acknowledge message to the service Access Network.
Among the present invention in the mobile terminal switching process to the transmission of the DHCP proxy/server context of its grappling as shown in Figure 3, may further comprise the steps:
Step s301～306th, the service Access Network is initiated the process of switching to target access network; DHCP proxy/server context that the service Access Network of terminal carries DHCP proxy/server migration indication and/or portable terminal grappling by handoff request message sends to target access network; Or DHCP proxy/server context that the service Access Network of portable terminal carries the portable terminal grappling by switch acknowledgment message sends to target access network.
Step s307～312nd, service Access Network and target access network data path are set up process; When portable terminal is set up the R4 data path in the moving process between ASN, carry DHCP proxy/server migration indication and/or DHCP proxy/server context by the request of setting up of R4 data path; Or set up response by the R4 data path and carry DHCP proxy/server context.
Step s313～317th, the process of mobile IP (MIP) registration, in the present invention, this process is optional.
Step s318～320th, service Access Network and target access network data path delete procedure.When portable terminal discharges the interim R4 data path of setting up in the moving process between ASN, carry DHCP migration indication and/or DHCP related context in the process of the data path by discharging interim foundation; Or in the response message that discharges this interim data path of setting up, carry the DHCP related context.
Among last Fig. 3, the contextual migration of DHCP can be carried out separately, also can carry out together with PMIP Client; If together moving, PMIP Client and DHCP can consider PMIP Client context and DHCP context are transmitted in the same way.Wherein PMIP Client context includes but not limited to shown in the table 2:
Table 2PMIP Client Context
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| HoA?address | The home agent of this portable terminal is the home IP address that it distributed | Be |
| IP?address?lifetime | The life cycle of this home IP address of distributing for this portable terminal | Not |
| MIP?Keys | This portable terminal MIP set of cipher key of being correlated with | Not |
If PMIP Client does not have and the DHCP context moves together, there is signaling and the message that needs definition so between the two, can directly transmit also can transmit and transmit, need have following primitive: R3_PMIP_Session.Release.Request (content includes but not limited to shown in the table 3) through context server relaying, R3_PMIP_Session.Release.Response (content includes but not limited to shown in the table 4), R3_PMIP_Session.Release.Confirm (content includes but not limited to shown in the table 5), R3DHCP_Session.Release.Request (content includes but not limited to shown in the table 6), R3_DHCP_Session.Release.Response (content includes but not limited to shown in the table 7), R3_DHCP_Session.Release.Confirm (content includes but not limited to shown in the table 8).
Table 3
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| HoA?address | The home agent of this portable terminal is the home IP address that it distributed | Be |
| Transaction?ID | The affairs ID of this process | Not |
Table 4
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| HoA?address | The home agent of this portable terminal is the home IP address that it distributed | Be |
| Transaction?ID | The affairs ID of this process | Not |
Table 5
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| HoA?address | The home agent of this portable terminal is the home IP address that it distributed | Be |
| Transaction?ID | The affairs ID of this process | Not |
Table 6
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| HoA?address | The home agent of this portable terminal is the home IP address that it distributed | Be |
| Transaction?ID | The affairs ID of this process | Not |
Table 7
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| HoA?address | The home agent of this portable terminal is the home IP address that it distributed | Be |
| Transaction?ID | The affairs ID of this process | Not |
Table 8
| Project name | Describe | Whether essential |
| MSID | The ID of portable terminal (can comprise MSID, and/or NAI) | Be |
| HoA?address | The home agent of this portable terminal is the home IP address that it distributed | Be |
| Transaction?ID | The affairs ID of this process | Not |
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the method for dynamic host configuration protocol DHCP proxy/servers migration is characterized in that when a terminal moved, and may further comprise the steps:
A, service Access Network and target access network consult whether to need to carry out DHCP proxy/server migration, if when affirmation need be carried out DHCP proxy/server migration, and execution in step B;
B, service Access Network transmit portable terminal DHCP proxy/server related context to target access network;
C, target access network heavily distribute this mobile terminal address according to described DHCP proxy/server related context.
2. the method for dynamic host configuring protocol agent/server migration is characterized in that when terminal moved according to claim 1, and steps A further comprises:
A1, service Access Network send DHCP proxy/server migration indication to target access network;
A2, target access network send DHCP proxy/server migration response to the service Access Network.
3. the method for dynamic host configuring protocol agent/server migration is characterized in that when moving as terminal as described in the claim 2, also comprises after the steps A 1:
Target access network shields the relevant signaling message of DHCP proxy/server that portable terminal sends to the former grappling of portable terminal according to the migration indication.
4. the method for dynamic host configuring protocol agent/server migration when moving as terminal as described in the claim 2, it is characterized in that, steps A 2 described migration responses comprise agrees response or refusal response, when target access network when the service Access Network sends DHCP proxy/server migration and agrees response, change step B; When target access network when the service Access Network sends DHCP proxy/server migration refusal response, handle by existing procedure.
5. the method for dynamic host configuring protocol agent/server migration is characterized in that when terminal moved according to claim 1, also comprised after the step C:
D, target access network send the migration acknowledge message to the service Access Network, comprise the transition process report in this message.
6. the method for dynamic host configuring protocol agent/server migration when terminal moves according to claim 1, it is characterized in that, comprise in the DHCP proxy among the step B/server related context: the DHCP proxy/server address of mobile terminal identification and/or the grappling of this portable terminal institute and the DHCP proxy/server of this grappling are for this portable terminal institute's IP address allocated and/or be life cycle of this IP address of this portable terminal distribution.
7. the method for Dynamic Host Configuration Protocol server migration is characterized in that when terminal moved according to claim 1, also comprised the related context of proxy mobile IP customer terminal among the step B.
8. the method for Dynamic Host Configuration Protocol server migration is characterized in that when moving as terminal as described in the claim 7, and the related context of described proxy mobile IP customer terminal and DCHP proxy/servers context transmit or transmission respectively simultaneously.
9. the method for dynamic host configuring protocol agent/server migration when moving as terminal as described in the claim 7, it is characterized in that described proxy mobile IP customer terminal related context comprises: the home IP address that the home agent of mobile terminal identification and this portable terminal distributes for this portable terminal and/or be the life cycle and/or the relevant MIP set of cipher key of this portable terminal of this home IP address of this portable terminal distribution.
10. the method for Dynamic Host Configuration Protocol server migration when moving as terminal as described in the claim 7, it is characterized in that, when the proxy mobile IP customer terminal of portable terminal and the DHCP proxy/server of this portable terminal are not in the same network and need that path is connected between net, then between new DHCP proxy/server and proxy mobile IP customer terminal, trigger the dispose procedure of the contextual information relevant each other with portable terminal by signaling control mechanism after the portable terminal moving process is finished.
11. the method for Dynamic Host Configuration Protocol server migration is characterized in that described message dispose procedure comprises: the release request of DHCP, response, affirmation when moving as terminal as described in the claim 10; And release request, response, the affirmation of proxy mobile IP customer terminal.
12. the method for Dynamic Host Configuration Protocol server migration is characterized in that when moving as terminal as described in the claim 2, it is one of following that the step that described service Access Network sends migration instruction and/or related context to target access network comprises:
When portable terminal switched, DHCP proxy/server context that the service Access Network of terminal carries DHCP proxy/server migration indication and/or portable terminal grappling by handoff request message sent to target access network; Or DHCP proxy/server context that the service Access Network of portable terminal carries the portable terminal grappling by switch acknowledgment message sends to target access network;
When portable terminal is set up the R4 data path in the moving process between accessing business network ASN, carry DHCP proxy/server migration indication and/or DHCP proxy/server context by the request of setting up of R4 data path; Or set up response by the R4 data path and carry DHCP proxy/server context;
When portable terminal discharges the interim R4 data path of setting up in the moving process between ASN, carry DHCP migration indication and/or DHCP related context in the process of the data path by discharging interim foundation; Or in the response message that discharges this interim data path of setting up, carry the DHCP related context.
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| CN101895959B (en) * | 2010-07-20 | 2013-02-27 | 华为终端有限公司 | Method and device for updating IP address of terminal under WIMAX network |
| CN112148534A (en) * | 2020-08-25 | 2020-12-29 | 网神信息技术（北京）股份有限公司 | Terminal seamless migration method and device, electronic equipment and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458763A (en) * | 2002-05-15 | 2003-11-26 | 华为技术有限公司 | Broadband network access method |
| WO2005041489A1 (en) * | 2003-10-23 | 2005-05-06 | Samsung Electronics Co., Ltd. | Formtext handover method in dhcpv4, handover apparatus and medium having instructions for performing the method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458763A (en) * | 2002-05-15 | 2003-11-26 | 华为技术有限公司 | Broadband network access method |
| WO2005041489A1 (en) * | 2003-10-23 | 2005-05-06 | Samsung Electronics Co., Ltd. | Formtext handover method in dhcpv4, handover apparatus and medium having instructions for performing the method |
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