CN101072426A - Care of address transmission method and system for communication network - Google Patents
Care of address transmission method and system for communication network Download PDFInfo
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- CN101072426A CN101072426A CNA200610060684XA CN200610060684A CN101072426A CN 101072426 A CN101072426 A CN 101072426A CN A200610060684X A CNA200610060684X A CN A200610060684XA CN 200610060684 A CN200610060684 A CN 200610060684A CN 101072426 A CN101072426 A CN 101072426A
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Abstract
When transference is going to take place at R3 channel of mobile terminal, service access network informs that destination access network (DAN) needs to obtain the forwarding address assigned by DAN for mobile terminal. DAN sends target-forwarding address assignable to mobile terminal to mobile terminal directly or indirectly. Thus, based on obtained new target-forwarding address, mobile terminal carries out normal logging on mobile IP so as to avoid communication interrupting.
Description
Technical field
The present invention relates to communication technical field, be meant the transmission method of the Care-of Address in a kind of WiMAX (WorldInteroperability for Microwave Access, World Interoperability for Microwave Access, WiMax) system especially.
Background technology
WiMAX (Worldwide Interoperability for Microwave Access), i.e. the interoperability of global microwave system, the whole network of WiMAX is mainly by forming with the lower part:
1, terminal (MS, Mobile Subscrier Station): the user uses this devices accessing WiMAX network;
2, access service network (ASN Access Service Network): ASN is defined as the network function set that the WiMAX terminal provides the wireless access service.ASN has comprised base station (BS Base Station) and access service network gateway (ASN-GW ASN Gateway) network element.Wherein the major function of BS network element is: provide the L2 of BS and MS to be connected, RRM or the like; The major function of ASN-GW network element is: for MS authentication function provides client functionality, provide for MS and switch in relaying (Relay) function (as IP address assignment), ASN of L3 information etc.
3, connect service network (CSN Connectivity Service Network): CSN is defined as the WiMAX terminal IP is provided Connection Service.The major function that CSN provided is: the IP address assignment of MS, Internet insert, authentication accounting server (AAA server) or authentication charging proxy server (AAAproxy), based on user's authorization control etc.
Above-mentioned three partial logic inter-entity communicate by the interface from R1 to R6, each network element and interface relationship as shown in Figure 1, Fig. 2 is the basic structure of WiMAX system.
In communication system, for realize mobile node still can be smoothly under situation of movement and the external world communicate, people use Mobile IP, promptly mobile IP (MIP) technology.Its basic principle is that mobile node is except having a fixed ip address (being the HoA address), also having the another one temporary ip address at the field network that moves to recently (is the CoA address, Care-of Address), set up the routing relation of corresponding relation and the home network and the field network of HoA address and CoA address by certain network mechanism, thus reach make mobile node when its network transformation with unbroken purpose of communicating by letter between other server networks.
At present, in the WIMAX system, between ASN, move or be in the network optimization and other reason and the external agent that causes portable terminal when moving when portable terminal, need to hold consultation between objective network and the service network, R3 is moved.Here explain, R3 is meant accessing business network (ASN) and the reference point that is connected between the service network (CSN).But the problem of transmission of the Care-of Address of portable terminal when still not having at present concrete scheme explanation R3 relocation.And if do not have required its new Care-of Address known of mobile IP customer terminal, then which Care-of Address portable terminal can't determine to use carry out the IP registration, thus communication interruption.At present among the WiMAX NWG (the network work group of WiMAX) during also not to R3 relocation the transmission problem of Care-of Address define.
Summary of the invention
The technical problem to be solved in the present invention is to provide the transmission method and the system of Care-of Address in a kind of communication network, in when, in the existing communication system R3 relocation taking place to solve because of the indefinite problem of Care-of Address transfer process.
For solving the problems of the technologies described above, the present invention realizes in the following manner:
The invention provides the transmission method of Care-of Address in a kind of communication network, when the R3 of portable terminal channel will move, it is the Care-of Address that portable terminal distributes that service Access Network notification target Access Network need obtain target access network, and target access network sends the target forward address that can distribute to portable terminal to portable terminal.
Preferable, it is that the detailed process of the Care-of Address that distributes of portable terminal is that described service Access Network notification target Access Network need obtain target access network:
The service Access Network sends to target access network and transmits the target forward address indication, perhaps
Preestablish the Care-of Address condition of transmitting, when satisfying when pre-conditioned, target access network just is defaulted as and need carries out the transmission of target forward address.
Preferable, described transmission target forward address indication can send to target access network separately by the service Access Network when determining to carry out R3 relocation; Perhaps
To transmit the target forward address indication and be placed at the service Access Network in target access network transmission R3 relocation Indication message; Perhaps
When portable terminal switches between access service network and need carry out R3 relocation the time, will transmit handoff request or the switch acknowledgment message that the target forward address indication places the service Access Network to send to target access network; Perhaps
When portable terminal switches between access service network and need carry out R3 relocation and set up the R4 data path time, places data path to set up response message described transmission target forward address indication.
Preferable, comprise following parameter in the described transmission target forward address indication: the identification information of portable terminal and R3 relocation indication, and/or require the target external agency to distribute the Care-of Address indication for this portable terminal.
Preferable, comprise that further anchor agent moves the sign and/or the mode for mobile terminal of IP mobility manager in the described transmission target forward address indication.
Preferable, target access network comprises to the step detailed process that portable terminal sends the target forward address that can distribute to portable terminal: target access network directly sends to portable terminal with target forward address by inside story, perhaps directly target forward address is passed to portable terminal by the broadcast clean culture by existing data channel, perhaps target forward address is passed to the service Access Network, this Care-of Address is sent to portable terminal by the service Access Network.
Preferable, target access network sends the target forward address that can distribute to portable terminal to portable terminal can carry out when moving switching, specifically comprises following process:
When portable terminal switches and need carry out R3 relocation the time, places target access network to the switch acknowledgment message that the service Access Network sends target forward address, by target access network this target forward address is sent to portable terminal then between access service network; Perhaps
When portable terminal switches between access service network and need carry out R3 relocation and set up the R4 data path, place target access network to set up request or acknowledge message described target forward address indication, send this target forward address to portable terminal by the service Access Network then to the data path that the service Access Network sends.
Preferable, target access network comprises to the context parameters of the Care-of Address that the service Access Network sends: the Care-of Address that the identification information of portable terminal and target external agency distribute for this portable terminal.
Preferable, target access network further comprises the life cycle of home address and/or home address to the context parameters of the Care-of Address of service Access Network transmission.
Preferable, portable terminal for the proxy-mobile IP type, need obtain the target external agency by grappling context server notification target external agent is the Care-of Address that portable terminal distributes, and the target external agency will send to the mobile IP customer terminal of portable terminal for the Care-of Address that portable terminal distributes.
The present invention also provides the transmission system of Care-of Address in a kind of communication network, comprises portable terminal and access service network, and this system also comprises:
Care-of Address transmits indicating member, be arranged in the service Access Network, in order to when the R3 of portable terminal channel will move, send the transmission Care-of Address and indicate to target access network, the notification target Access Network will send portable terminal to for the new Care-of Address that portable terminal distributes; And
The Care-of Address transmitting element is arranged in the target access network, in order to will send the service Access Network for the new Care-of Address that portable terminal distributes to or directly to send to portable terminal after receiving above-mentioned transmission Care-of Address indication.
Preferable, described Care-of Address transmits indicating member and is arranged in the context server of serving Access Network, and described Care-of Address transmitting element is arranged among the target external agency of target access network.
As seen from the above, the transfer process of Care-of Address provides multiple transmission means during the present invention is clear and definite R3 relocation.Need carry out the transmission of target forward address by service Access Network notification target Access Network explicit or implicit expression, target access network is by the direct or indirect mobile IP customer terminal that target forward address is passed to portable terminal, when having realized carrying out R3 relocation, the transmission of Care-of Address, make terminal to carry out normal mobile IP registration, avoided communication disruption according to the new target forward address that obtains.
Description of drawings
Fig. 1 is an existing communication system architecture schematic diagram;
Fig. 2 is the basic structure schematic diagram of existing WiMAX system;
Figure 3 shows that the schematic diagram of the transmission method of Care-of Address in the communication network provided by the invention;
Figure 4 shows that the schematic flow sheet of the present invention's first preferred embodiment;
Figure 5 shows that the schematic flow sheet of the present invention's second preferred embodiment;
Figure 6 shows that the block diagram that the invention provides the transmission system of Care-of Address in the communication network.
Embodiment
See also Fig. 3, the invention provides the method that (when switching between ASN as terminal) carries out the target forward address transmission when needing R3 relocation, need carry out R3 relocation and need to obtain the Care-of Address that the target external agency is distributed by service Access Network notification target Access Network, by target access network direct or indirect send the new target forward address that can distribute to portable terminal to portable terminal.
For making the purpose, technical solutions and advantages of the present invention clearer, describe in further detail below in conjunction with accompanying drawing and preferred embodiment of the present invention.
First preferred embodiment
Figure 4 shows that first preferred embodiment of the present invention.In the present embodiment, for the portable terminal of proxy-mobile IP type, need carry out R3 relocation and need know the Care-of Address that the target external agency is distributed by the context server notification target external agent of portable terminal.It mainly may further comprise the steps:
Step 41, when determining will R3 relocation to take place, the context server of portable terminal sends a request message to target access network earlier, require to certain portable terminal carries out R3 relocation, and the request target Access Network transmits target forward address.Concrete, can send a request message to the target external agency.The field description of described request message is as shown in table 1:
| Parameter information | Describe | Whether essential |
| MSID | The ID of portable terminal (can be MSID and/or NAI) | Be |
| R3?Relocation?indicator | The R3 relocation indication | Not |
| CoA?transfer?indicator | Require target FA to distribute Care-of Address for this portable terminal | Not |
| Anchor?PMIP?Mobility?Manager | Grappling PMIP mobility manager | Not |
| MS?mobility?mode | The Move Mode of portable terminal | Not |
Table 1
Need to prove, parameters R 3 Relocation indicator and CoA transferindicator in the table 1 have an existence at least, context server can carry when the transmission R3 relocation is indicated to target access network and send target forward address transmission indication, also can send the target forward address Indication message separately and transmit target forward address to the target access network request.
MSID indicates necessary parameter for transmitting target forward address in the table 1, and it can be included in this message.Optionally, also can carry MSID information, as long as can unique identification and determine the sign of the required portable terminal of delivering of this Care-of Address in the relevant signaling of transmitting this message and any part in the context thereof.The ID identifier information that described MSID parameter can be a portable terminal, promptly identity information of user terminal etc. also can be network access identifier information NAI.
Step 42, target access network respond aforementioned request to agree or refusal, if agree to carry out R3 relocation, then in the mutual affirmation of service Access Network and target access network, will distribute to the new target forward address of portable terminal direct or indirect send portable terminal to.
Target access network transmits Indication message by target forward address and sends described new target forward address to portable terminal.The field description that this target forward address transmits in the Indication message is as shown in table 2:
| Parameter information | Describe | Whether essential |
| MSID | The ID of portable terminal (can be MSID and/or NAI) | Be |
| CoA | The Care-of Address that target FA distributes for this portable terminal | Be |
| HoA | Home address | Not |
| HoA?lifetime | The life cycle of home address | Not |
Table 2
By indirect the sending target forward address to portable terminal and realize in the following manner of target access network.
The target forward address that step 42a1, target external agency will distribute to portable terminal sends context server to;
Step 42a2, context server are carried at this target forward address related context the mobile IP customer terminal of issuing portable terminal in the R3 relocation request message of the proxy-mobile IP functional entity that is sent to portable terminal.
Directly sending target forward address to portable terminal by target access network realizes in the following manner: the agency directly passes to the external address clean culture this portable terminal (step 42b) by existing R4 passage by target external.Optionally, the target external agency context server that can make progress is carried out response confirmation.Context server sends the R3 relocation indication to the mobile IP customer terminal of portable terminal.
Step 43, portable terminal carry out Signalling exchange according to the new target forward address and the target access network that obtain, carry out normal mobile IP registration process.
In the transmission course of above-mentioned Care-of Address, be by explicit send the transmitting target forward address to target access network and indicate the transmission that realizes Care-of Address of context server.Optionally, also can realize the transmission of Care-of Address by the mode of implicit expression.For example can realize by preestablishing the Care-of Address condition of transmitting, when satisfying when pre-conditioned, target access network just is defaulted as and need carries out the transmission of target forward address, and the direct or indirect new target forward address that will distribute to portable terminal passes to portable terminal.Such as, when context server transmission R3 relocation was indicated to target access network, target access network passed to portable terminal with regard to the direct or indirect new target forward address that will distribute to portable terminal.
Second preferred embodiment
Figure 5 shows that the schematic flow sheet of second preferred embodiment of the present invention, in the present embodiment, for the portable terminal of proxy-mobile IP type, its target forward address can be by transmitting in the handoff procedure signaling of portable terminal between ASN.Concrete may further comprise the steps:
Step 501～506 are process from switching to target access network that initiate.
Step 507～512 are the data channel dispose procedure between service ASN and the target ASN;
Step 514 is MIP (mobile IP) registration process.
Wherein, can adopt the information of reciprocal process in the top flow process to send target forward address transmission indication.
Specifically, can serve Access Network and carry target forward address transmission indication in step 502 in the handoff request message that target access network sends, the indicating target Access Network need carry out R3 relocation and need to obtain the Care-of Address that the target external agency is distributed.As shown in table 1 in field information first preferred embodiment of described target forward address transmission indication do not repeat them here.In step 503, the target external agency of target access network responds to agree or refusal that the Care-of Address that will distribute if R3 relocation is carried out in agreement and the identification information of portable terminal are carried in the switching response message that mails to the service Access Network and send service network to according to the target forward address transmission indication of reception.Optionally, can also comprise other parameter information shown in table 2 in first preferred embodiment in this switching response message.Optionally, also can serve Access Network in step 506 increases target forward address transmission indication in the switch acknowledgment message that target access network sends, and target access network transmits target forward address according to this target forward address transmission indication.
Optionally, R3 relocation indication and Care-of Address transmission indication can not carried out in step 502 and 503, but can step 507 realize to step 510.In the process of setting up the R4 data path, service Access Network and target access network carry out information interaction, after the service Access Network obtains external agent's the response of explicit or implicit expression of target access network, receive the Care-of Address of distributing to this portable terminal that the external agent of target access network sends.One of for example, can be in the following ways:
(1) data path that target access network mails to the service Access Network in step 508 is set up in the request message the new target forward address that portable terminal is distributed and is sent the service Access Network to, and the field information in the described target forward address transmission indication is shown in the table 2 in first preferred embodiment.
(2) path that the service Access Network mails to target access network in step 509 is set up to increase in the acknowledge message and is transmitted the target forward address indication, and the target external agency of notification target Access Network will carry out R3 relocation and need sending to the mobile IP customer terminal of portable terminal to the new target forward address that portable terminal distributes.The field information of the transmission target forward address indication of described increase is shown in the table 1 in first preferred embodiment.After target access network can pass to target forward address the service Access Network, by the service Access Network target forward address is passed to the mobile IP customer terminal of portable terminal again, perhaps target access network is directly passed to the target forward address clean culture mobile IP customer terminal of portable terminal by existing R4 data path.
(3) target access network is issued the data path of serving Access Network is set up increases portable terminal in the acknowledge message identification information/network access Identifier information and target forward address in step 510.
The 3rd preferred embodiment
For the portable terminal of proxy-mobile IP type, also can realize in the following manner for the triggering of R3 relocation and the transmission of target forward address:
The target external agency who is triggered target access network by the grappling context server carries out R3 relocation, and requires to transmit target forward address;
Through the two negotiation, the grappling context server passes to the target external agency with this portable terminal related context;
Target proxy thinks that all parameters that need all possess, and can allow this portable terminal to carry out R3 relocation, then notify the mobile IP functional entity of this portable terminal, perhaps the router broadcast message unicast is given the mobile IP functional entity of this portable terminal by the R4 data channel between different access networks by inside story (if the mobile IP functional entity of target external agency and this portable terminal is positioned on the entity).
The present invention also provides the transmission system of Care-of Address in a kind of communication network, comprises portable terminal and access service network.In the context server of the portable terminal of the service Access Network of this system, be provided with Care-of Address and transmit indicating member, in order to when the R3 of portable terminal channel will move, send the transmission Care-of Address and indicate to target access network, the notification target Access Network will send portable terminal to for the new Care-of Address that portable terminal distributes.In the external agent of the target access network of this system, be provided with the Care-of Address transmitting element, serve Access Network or directly send to portable terminal in order to after receiving above-mentioned transmission Care-of Address indication, will send to for the new Care-of Address that portable terminal distributes.Described Care-of Address transmits indicating member and sends the concrete mode of transmitting the Care-of Address indication to target access network, and the Care-of Address transmitting element is the process that transmits target forward address to portable terminal, can not repeat them here with reference to above-mentioned transmission method description partly Care-of Address provided by the invention.
By last embodiment as can be seen, the transmission of Care-of Address when the present invention has realized R3 relocation, the transmission of target forward address can be adopted implicit expression or explicit mode, can know that need carry out R3 relocation time acquiescence carries out target forward address and transmit at objective network, thereby by the direct or indirect mobile IP customer terminal that target forward address is passed to portable terminal; Perhaps can trigger the transmission of Care-of Address by service access network by target forward address transmission indication; Perhaps in the handoff procedure signaling of portable terminal between ASN, transmit target forward address.In a word, when the present invention carries out R3 relocation when needs, realized the transmission of Care-of Address, made terminal to carry out normal mobile IP registration, avoided communication disruption according to the new target forward address that obtains.
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 transmission method of Care-of Address in a kind of communication network is characterized in that: comprising:
When the R3 of portable terminal channel will move, it was the Care-of Address that portable terminal distributes that service Access Network notification target Access Network need obtain target access network, and target access network sends the target forward address that can distribute to portable terminal to portable terminal.
2, method according to claim 1 is characterized in that: it is that the detailed process of the Care-of Address that distributes of portable terminal is that described service Access Network notification target Access Network need obtain target access network:
The service Access Network sends to target access network and transmits the target forward address indication, perhaps
Preestablish the Care-of Address condition of transmitting, when satisfying when pre-conditioned, target access network just is defaulted as and need carries out the transmission of target forward address.
3, method according to claim 2 is characterized in that: described transmission target forward address indication can send to target access network separately by the service Access Network when determining to carry out R3 relocation; Perhaps
To transmit the target forward address indication and be placed at the service Access Network in target access network transmission R3 relocation Indication message; Perhaps
When portable terminal switches between access service network and need carry out R3 relocation the time, will transmit handoff request or the switch acknowledgment message that the target forward address indication places the service Access Network to send to target access network; Perhaps
When portable terminal switches between access service network and need carry out R3 relocation and set up the R4 data path time, places data path to set up response message described transmission target forward address indication.
4, method according to claim 2, it is characterized in that: comprise following parameter in the described transmission target forward address indication: the identification information of portable terminal and R3 relocation indication, and/or require the target external agency to distribute the Care-of Address indication for this portable terminal.
5, method according to claim 4 is characterized in that: comprise that further anchor agent moves the sign and/or the mode for mobile terminal of IP mobility manager in the described transmission target forward address indication.
6, method according to claim 1, it is characterized in that: target access network comprises to the step detailed process that portable terminal sends the target forward address that can distribute to portable terminal: target access network directly sends to target forward address portable terminal by inside story or directly target forward address is passed to portable terminal or target forward address is passed to the service Access Network by the broadcast clean culture by existing data channel, by the service Access Network this Care-of Address is sent to portable terminal.
7, method according to claim 1 is characterized in that: target access network sends the target forward address that can distribute to portable terminal to portable terminal can carry out when moving switching, specifically comprises following process:
When portable terminal switches and need carry out R3 relocation the time, places target access network to the switch acknowledgment message that the service Access Network sends target forward address, by target access network this target forward address is sent to portable terminal then between access service network; Perhaps
When portable terminal switches between access service network and need carry out R3 relocation and set up the R4 data path, place target access network to set up request or acknowledge message described target forward address indication, obtain this target forward address and send to portable terminal by the service Access Network then to the data path that the service Access Network sends.
8, method according to claim 1 is characterized in that: target access network comprises to the context parameters of the Care-of Address that the service Access Network sends: the Care-of Address that the identification information of portable terminal and target external agency distribute for this portable terminal.
9, method according to claim 8 is characterized in that: target access network further comprises the life cycle of home address and/or home address to the context parameters of the Care-of Address of service Access Network transmission.
10, according to each described method of claim 1 to 9, it is characterized in that: for the portable terminal of proxy-mobile IP type, need obtain the target external agency by grappling context server notification target external agent is the Care-of Address that portable terminal distributes, and the target external agency will send to the mobile IP customer terminal of portable terminal for the Care-of Address that portable terminal distributes.
11, the transmission system of Care-of Address in a kind of communication network comprises portable terminal and access service network, it is characterized in that: also comprise
Care-of Address transmits indicating member, be arranged on the service Access Network, in order to when the R3 of portable terminal channel will move, send the transmission Care-of Address and indicate to target access network, the notification target Access Network will send portable terminal to for the new Care-of Address that portable terminal distributes; And
The Care-of Address transmitting element is arranged in the target access network, in order to will send the service Access Network for the new Care-of Address that portable terminal distributes to or directly to send to portable terminal after receiving above-mentioned transmission Care-of Address indication.
12, system according to claim 11 is characterized in that: described Care-of Address transmits indicating member and is arranged in the context server of serving Access Network, and described Care-of Address transmitting element is arranged among the target external agency of target access network.
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| CNA200610060684XA CN101072426A (en) | 2006-05-11 | 2006-05-11 | Care of address transmission method and system for communication network |
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| CNA200610060684XA CN101072426A (en) | 2006-05-11 | 2006-05-11 | Care of address transmission method and system for communication network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009103229A1 (en) * | 2008-02-18 | 2009-08-27 | 华为技术有限公司 | Method and advice for obtaining anchor data passage function address |
| CN101494575B (en) * | 2008-01-22 | 2010-12-08 | 华为技术有限公司 | Management method and proxy equipment for personal area network |
-
2006
- 2006-05-11 CN CNA200610060684XA patent/CN101072426A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101494575B (en) * | 2008-01-22 | 2010-12-08 | 华为技术有限公司 | Management method and proxy equipment for personal area network |
| WO2009103229A1 (en) * | 2008-02-18 | 2009-08-27 | 华为技术有限公司 | Method and advice for obtaining anchor data passage function address |
| CN101516084B (en) * | 2008-02-18 | 2012-02-29 | 华为技术有限公司 | Method and device for acquiring an address of an anchoring data channel functional entity |
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