CN101072425A - Wireless evolution network switching method and system - Google Patents
Wireless evolution network switching method and system Download PDFInfo
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- CN101072425A CN101072425A CNA2006100606835A CN200610060683A CN101072425A CN 101072425 A CN101072425 A CN 101072425A CN A2006100606835 A CNA2006100606835 A CN A2006100606835A CN 200610060683 A CN200610060683 A CN 200610060683A CN 101072425 A CN101072425 A CN 101072425A
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Abstract
When switching occurs at access terminal AT, access gateway AGW determines whether switching between LMHA occurs; if yes, then the method builds bidirectional tunnel between AGW to realize data transmission. Advantages are: ensuring continuity of user service, giving better experience for users, increasing satisfaction degree on service provided by operation manager from users. The invention possesses important meaning for solving long evolution of network.
Description
Technical field
The present invention relates to moving communicating field, the handoff technique in particularly a kind of wireless evolution network.
Background technology
In order to keep third generation partner program 2 (3GPP2,3rd Generation Partnership Project2) competitiveness of system in future, carrying out the Long Term Evolution (LTE of network evolution aspect, Long Term Evolution) and the research of System Architecture Evolution (SAE, SystemArchitecture Evolution).The main problem of paying close attention to of the ongoing network evolution items of 3GPP2 normal structure research is the Long Term Evolution problem of IP packet network.The main purpose of network evolution strengthens packet switched capabilities exactly, simplify network configuration, (QoS improves service quality, Quality ofService), reduce time delay, improve user data rate, improve power system capacity and coverage rate, minimizing operation cost etc., make packet network after the evolution that the carrying to real time business and non-real-time service can more effectively be provided, for the user provides abundant more business.
Figure 1 shows that the demand of evolution Network Based, a kind of evolvement network framework that on the 3GPP2 standards meetings, proposes.Among Fig. 1, local mobile home agent (LMHA, Local Mobility Home Agent) as mobile Internet Protocol (IP, Internet Protocol) home agent in (HA, Home Agent) is born mobile management, and is (the AT that accesses terminal, Access Terminal) as, travelling carriage (MS, Mobile Station) or user terminal (UE, User Equipment) distributing IP address.IAD (AGW, Access Gateway) major function is first hop router as AT, finish authentication function, as remote authentication dial-in user service (RADIUS, Remote AuthenticationDial-In User Service) client, mobile management, QoS support, bear the function of the former packet data serving node of part (PDSN, Packet Data Service Node).Topmost feature is that user face data has only double bounce under this framework, and user data delay is little.
In Wireless IP network, professional mobility realizes by switching.If in handoff procedure, do not change the IP address of AT, only need to carry out link switchover and can keep professional continuity.If in handoff procedure, changed the IP address of AT, then can cause professional discontinuity, user experience is bad.
When switching occurred between the AGW that same LMHA administers, the service LMHA before and after switching was same LMHA, and this switching is called as in the LMHA switches; When switching occurred between the AGW of Different L MHA administration, the service LMHA before and after switching was not same LMHA, and this switching is called as between LMHA switches.
At Fig. 1 evolution network framework, at present for not clearly definition of the switching flow between LMHA.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide changing method and the system in a kind of wireless evolution network, the indefinite problem of flow process when taking place to switch between LMHA in the existing radio gradual network structure to solve.
For solving the problems of the technologies described above, technical scheme provided by the invention is achieved in that
The invention provides the changing method in a kind of wireless evolution network, it is characterized in that, when judged result is an access terminal AT when having taken place to switch between local mobile home agent LMHA, between source access gateway AGW and target AGW, set up bidirectional tunnel and realize transfer of data.
Preferable, before obtaining described judged result, carry out the switching type judgement, its process comprises:
Target AGW obtains the IP address of source LMHA, and whether the IP address of reference source LMHA is identical with the IP address of target LMHA under self, if inequality, then judge and has taken place to switch between LMHA; Perhaps
Target AGW obtains the IP address of AT, and relatively AT IP with and the IP address of self affiliated target LMHA whether belong to identical subnet section; If inequality, then judge and taken place to switch between LMHA.
Preferable, the IP address of described source LMHA and/or the IP address of AT directly are sent to target AGW by source AGW, perhaps obtain and be sent to target AGW by other entities.
Preferable, before carrying out the switching type judgement, carry out context transfer, the context of AT is transferred to target AGW from source AGW; Perhaps after carrying out switching type judgement, when setting up the bidirectional tunnel between the AGW or set up after the bidirectional tunnel, carry out the AT context transfer, the context of AT is transferred to target AGW from source AGW.
Preferable, described context comprises the IP address of source LMHA and/or IP address and/or QoS information and/or header compression algorithm and/or charge information and/or safe key and/or version information and/or the AT tenability of AT.
Preferable, described source AGW and target AGW are the AGW of access technology of the same race, or the AGW of xenogenesis access technology.
The present invention also provides the switched system in a kind of wireless evolution network, comprises at least one access terminal AT, the mobile home agent LMHA in some this locality, and some access gateway AG W is characterized in that: also comprise
The switch decision unit is arranged among the AGW, in order to carry out the switching type judgement when AT switches, judges whether to have taken place to switch between LMHA; With
Bidirectional tunnel in order to when the switch decision unit judges has taken place to switch between LMHA, is set up with transceive data in the tunnel construction unit between AGW.
Preferable, comprise information extraction unit among the described AGW, in order to the IP address that obtains source LMHA and/or the IP address of AT, when AT switches, whether the IP address of the target LMHA under the IP address and target AGW self of the source LMHA that the switch decision unit comparison among the target AGW is obtained by information extraction unit is identical, if identical, then judge and taken place to switch between LMHA; Perhaps whether the IP of the IP address of the AT that obtained by information extraction unit of the switch decision unit comparison among the target AGW and the described target LMHA of target AGW if not, then judges and has taken place to switch between LMHA in identical subnet section.
Preferable, also comprise the context delivery unit among the described AGW, before carrying out switch decision in the switch decision unit; Perhaps after the switch decision unit judges has taken place between LMHA to switch, when bidirectional tunnel is set up between AGW in the tunnel construction unit or set up after the bidirectional tunnel, the context of AT is sent to target AGW from source AGW.
Preferable, described context comprises the IP address of source LMHA and/or IP address and/or QoS information and/or header compression algorithm and/or charge information and/or safe key and/or version information and/or the AT tenability of AT.
Preferable, described AGW is the AGW of access technology of the same race, perhaps is the AGW of xenogenesis access technology.
Compare and prior art, standard of the present invention hand-off process flow process between LMHA takes place, when taking place to switch between LMHA, realize transfer of data by between target AGW and target AGW, setting up bidirectional tunnel, guarantee the continuity of customer service, better experience for the user, increase the user, have great importance for solving the long-term evolution issues of network to the satisfaction that operator provides service.
Description of drawings
Fig. 1 is existing evolvement network framework schematic diagram;
Fig. 2 is the first preferred embodiment schematic flow sheet of changing method provided by the invention;
Fig. 3 is the second preferred embodiment schematic flow sheet of changing method provided by the invention;
Fig. 4 is the 3rd a preferred embodiment schematic flow sheet of changing method provided by the invention;
Fig. 5 is the structural representation of switched system provided by the invention.
Embodiment
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.
Figure 2 shows that the schematic flow sheet of first preferred embodiment of the present invention, changing method in the evolvement network provided by the invention is when AT switches, target AGW judges whether to have taken place to switch between LMHA, but do not carry out the context transfer of AT, when judged result when having taken place to switch between LMHA, between source AGW and target AGW, set up bidirectional tunnel.As shown in Figure 2, it mainly may further comprise the steps:
Step 1:AT and source AGW carry out proper communication, and user data is through source AGW and source LMHA; The wireless measurement report that source AGW reports according to AT, whether decision needs to trigger switches, and switches if desired, then determines target AGW.
Step 2: target AGW obtains the IP address of source LMHA and the information such as IP address of AT when learning that switching has taken place AT.Target AGW and source AGW carry out information interaction by the interface between them, obtain to set up AT from source AGW and are connected needed information with target AGW.Source AGW sends handoff request message to target AGW, and target AGW obtains relevant information according to this handoff request message from source AGW, and sends switching response message to source AGW.Source AGW can be carried at the IP address information of the IP address of source LMHA and AT in the described handoff request message and send to target AGW, also can be sent to target AGW separately.
The IP address of above-mentioned source LMHA and the IP address information of AT also can obtain and pass to target AGW by other functional entity, as passing through RRM (RRM, Radio ResourceManagement) entity etc.
Step 3: switching type judgement.Target AGW judges whether AT has taken place to switch between LMHA, if do not take place to switch between LMHA, then handles according to switching flow in the existing LMHA; If taken place to switch between LMHA, then execution in step 4; In this step, judge whether that the method that takes place to switch between LMHA specifically comprises following 2 kinds:
(1) whether the IP address of the source LMHA that relatively obtains of target AGW is identical with the IP address of target LMHA under self, if two IP address differences then can be judged and take place to switch between LMHA;
(2) whether the IP of the IP of the AT that relatively obtains of target AGW and the target LMHA under self belongs to same subnet section, if belong to different subnet sections, then can judge and take place to switch between LMHA.
Step 4: adopt tunneling technique between source AGW and target AGW, to set up bidirectional tunnel.Source AGW sends login request message to target AGW, and target AGW sends registration reply message to source AGW, thereby sets up bidirectional tunnel between source AGW and target AGW.Described tunneling technique comprises layer two tunneling technique, as L2F, and PPTP, L2TP, self-defined special layer two tunnels etc. and layer three tunneling technique, as generic route encapsulation GRE, IPinIP, minimum encapsulation etc., these tunneling techniques do not repeat them here by known in the industry.
Step 5:AT and target AGW connect, and target AGW begins to send data to AT.
Step 6: the forward direction user data finally arrives AT through source LMHA, source AGW, target AGW; Oppositely user data finally reaches external network through target AGW, source AGW, source LMHA.The activated state switching flow is finished between whole LMAH.
See also Fig. 3, will describe second preferred embodiment in detail below, step identical with first preferred embodiment in the changing method of second preferred embodiment repeats no more, and emphasis is described different piece.
Compare with first preferred embodiment, its treatment step difference is in second preferred embodiment: after target AGW carries out the switching type judgement, when judged result when having taken place to switch between LMHA, carry out the context transfer of AT when between source AGW and target AGW, setting up bidirectional tunnel, the context of AT is forwarded to target AGW from source AGW; After perhaps the bidirectional tunnel between source AGW and target AGW is set up, carry out the context transfer of AT, the context of AT is transferred to target AGW from source AGW.
See also Fig. 4, will describe the 3rd preferred embodiment in detail below, step identical with first preferred embodiment or second preferred embodiment in the changing method of the 3rd preferred embodiment repeats no more, and emphasis is described different piece.
In the 3rd preferred embodiment provided by the invention, carry out the context transfer of AT earlier, and then judge whether to have taken place to switch between LMHA at target AGW.Compare with first preferred embodiment, its treatment step difference is: when learning that switching has taken place AT, target AGW and source AGW carry out information interaction by the interface between them at target AGW.Source AGW comprises the IP address of source LMHA and the IP information of AT etc. to the context that target AGW transmits AT in the context message that transmits.Target AGW is according to judging whether to have taken place to switch between LMHA from the IP address of the source LMHA that source AGW obtains and the IP information of AT etc., if taken place to switch between LMHA then set up bidirectional tunnel between AGW and target AGW.In the present embodiment, the process and first preferred embodiment that judge whether to take place to switch between LMHA and set up bidirectional tunnel are roughly the same, do not repeat them here.
Described in the present invention source AGW and target AGW can be the AGW of access technology of the same race, as are the IAD of 3GPP2, also can be the AGW of xenogenesis access technology, as the IAD of 3GPP2 and the IAD of WLAN.Can realize professional continuity by setting up the tunnel between the AGW.
See also Fig. 5, the present invention also provides the switched system in a kind of wireless evolution network, comprises at least one access terminal AT, the mobile home agent LMHA in some this locality, some access gateway AG W.Be provided with the switch decision unit among the described AGW,, carry out the switching type judgement, judge whether to have taken place to switch between LMHA as target AGW in order to when AT switches.Between AGW, be provided with the tunnel construction unit,, between AGW, set up bidirectional tunnel with transceive data in order to when the switch decision unit judges has taken place to switch between LMHA.Described AGW also comprises the context delivery unit, in order at AGW during as source AGW, before the switch decision unit carries out switch decision; Perhaps after the switch decision unit judges has taken place between LMHA to switch, when bidirectional tunnel is set up between AGW in the tunnel construction unit or set up after the bidirectional tunnel, the context of AT is sent to target AGW from source AGW.Described context comprises the IP address of source LMHA, IP address, QoS information, header compression algorithm, charge information, safe key, version information and/or AT tenability of AT or the like.
Also comprise information extraction unit among the described AGW, in order to the IP address that obtains source LMHA and/or the IP address of AT, when AT switches, whether the IP address of the target LMHA under the IP address and target AGW self of the source LMHA that the switch decision unit comparison among the target AGW is obtained by information extraction unit is identical, if identical, then judge and taken place to switch between LMHA; Perhaps whether the IP of the IP address of the AT that obtained by information extraction unit of the switch decision unit comparison among the target AGW and the described target LMHA of target AGW if not, then judges and has taken place to switch between LMHA in identical subnet section.
Described source AGW and target AGW can be the AGW of access technology of the same race, also can be the AGW of xenogenesis access technology.As be the IAD of 3GPP2, also can be the AGW of xenogenesis access technology, as the IAD of 3GPP2 and the IAD of WLAN.Can realize professional continuity by setting up the tunnel between the AGW.
In sum, technical scheme provided by the invention is at the existing network framework, defined the handling process when taking place to switch between LMHA, realize transfer of data by between source AGW and target AGW, setting up bidirectional tunnel, avoided under the simple IP situation, when activated state between LMHA taking place switch, because of the variation of the IP address of AT causes professional discontinuity; Also avoided under mobile IP situation, need regain Care-of Address (CoA, Care-of Address) and the Signalling exchange and the handover delay that cause.
The above only is process of the present invention, method and system embodiment, in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is not equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, the changing method in a kind of wireless evolution network is characterized in that, when judged result is an access terminal AT when having taken place to switch between local mobile home agent LMHA, sets up bidirectional tunnel and realize transfer of data between source access gateway AGW and target AGW.
2, method according to claim 1 is characterized in that: before obtaining described judged result, carry out the switching type judgement, its process comprises:
Target AGW obtains the IP address of source LMHA, and whether the IP address of reference source LMHA is identical with the IP address of target LMHA under self, if inequality, then judge and has taken place to switch between LMHA; Perhaps
Target AGW obtains the IP address of AT, and relatively AT IP with and the IP address of self affiliated target LMHA whether belong to identical subnet section; If inequality, then judge and taken place to switch between LMHA.
3, method according to claim 2 is characterized in that: the IP address of described source LMHA and/or the IP address of AT directly are sent to target AGW by source AGW, perhaps obtain and be sent to target AGW by other entities.
4, method according to claim 2 is characterized in that: before carrying out the switching type judgement, carry out context transfer, the context of AT is transferred to target AGW from source AGW; Perhaps after carrying out switching type judgement, when setting up the bidirectional tunnel between the AGW or set up after the bidirectional tunnel, carry out the AT context transfer, the context of AT is transferred to target AGW from source AGW.
5, method according to claim 4 is characterized in that: described context comprises the IP address of source LMHA and/or IP address and/or QoS information and/or header compression algorithm and/or charge information and/or safe key and/or version information and/or the AT tenability of AT.
6, according to each described method of claim 1 to 5, it is characterized in that: described source AGW and target AGW are the AGW of access technology of the same race, or the AGW of xenogenesis access technology.
7, the switched system in a kind of wireless evolution network comprises at least one access terminal AT, the mobile home agent LMHA in some this locality, and some access gateway AG W is characterized in that: also comprise
The switch decision unit is arranged among the AGW, in order to carry out the switching type judgement when AT switches, judges whether to have taken place to switch between LMHA; With
Bidirectional tunnel in order to when the switch decision unit judges has taken place to switch between LMHA, is set up with transceive data in the tunnel construction unit between AGW.
8, system according to claim 7, it is characterized in that: comprise information extraction unit among the described AGW, in order to when AT switches, obtain the IP address of source LMHA and/or the IP address of AT, when AT switches, whether the IP address of the target LMHA under the IP address and target AGW self of the source LMHA that the switch decision unit comparison among the target AGW is obtained by information extraction unit is identical, if identical, then judge and taken place to switch between LMHA; Perhaps whether the IP of the IP address of the AT that obtained by information extraction unit of the switch decision unit comparison among the target AGW and the described target LMHA of target AGW if not, then judges and has taken place to switch between LMHA in identical subnet section.
9. system according to claim 7, it is characterized in that: also be provided with the context delivery unit among the AGW, carry out before the switch decision in order to the switch decision unit, perhaps after the switch decision unit judges has taken place to switch between LMHA, when bidirectional tunnel is set up between AGW in the tunnel construction unit or set up after the bidirectional tunnel, the context of AT is sent to target AGW from source AGW.
10. system according to claim 9, it is characterized in that described context comprises the IP address of source LMHA and/or IP address and/or QoS information and/or header compression algorithm and/or charge information and/or safe key and/or version information and/or the AT tenability of AT.
11, according to each described system of claim 7 to 10, it is characterized in that: described AGW is the AGW of access technology of the same race, perhaps is the AGW of xenogenesis access technology.
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| CNA2006100606835A CN101072425A (en) | 2006-05-11 | 2006-05-11 | Wireless evolution network switching method and system |
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| WO2009117956A1 (en) * | 2008-03-28 | 2009-10-01 | 华为技术有限公司 | A cross-network tunnel switch method and an inter-network interconnection device |
| WO2009137994A1 (en) * | 2008-05-12 | 2009-11-19 | 中兴通讯股份有限公司 | Binding establishment method and system of access gateway |
| CN101511116B (en) * | 2009-02-26 | 2011-04-13 | 华为技术有限公司 | Method, system and equipment for switching hometown agent in mobile IP domain |
| CN102076037A (en) * | 2011-01-14 | 2011-05-25 | 大唐移动通信设备有限公司 | Method and device for transmitting switching information |
| CN102480782A (en) * | 2010-11-25 | 2012-05-30 | 中兴通讯股份有限公司 | Gateway relocation method and source shunt gateway |
| WO2018090230A1 (en) * | 2016-11-16 | 2018-05-24 | 华为技术有限公司 | Data migration method and device |
| CN109417706A (en) * | 2016-07-12 | 2019-03-01 | 华为技术有限公司 | Method and apparatus for storing contextual information in a mobile device |
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| US8331323B2 (en) | 2008-03-28 | 2012-12-11 | Huawei Technologies Co., Ltd. | Inter-network tunnel switching method and inter-network interconnection device |
| WO2009117956A1 (en) * | 2008-03-28 | 2009-10-01 | 华为技术有限公司 | A cross-network tunnel switch method and an inter-network interconnection device |
| WO2009137994A1 (en) * | 2008-05-12 | 2009-11-19 | 中兴通讯股份有限公司 | Binding establishment method and system of access gateway |
| CN101582828B (en) * | 2008-05-12 | 2011-12-07 | 中兴通讯股份有限公司 | Method and system for establishing the binding of access gateway |
| CN101511116B (en) * | 2009-02-26 | 2011-04-13 | 华为技术有限公司 | Method, system and equipment for switching hometown agent in mobile IP domain |
| CN102480782B (en) * | 2010-11-25 | 2016-03-30 | 中兴通讯股份有限公司 | Gateway method for relocating and source shunting gateway |
| WO2012068935A1 (en) * | 2010-11-25 | 2012-05-31 | 中兴通讯股份有限公司 | Gateway relocation method and source shunt gateway |
| CN102480782A (en) * | 2010-11-25 | 2012-05-30 | 中兴通讯股份有限公司 | Gateway relocation method and source shunt gateway |
| CN102076037B (en) * | 2011-01-14 | 2014-11-12 | 大唐移动通信设备有限公司 | Method and device for transmitting switching information |
| CN102076037A (en) * | 2011-01-14 | 2011-05-25 | 大唐移动通信设备有限公司 | Method and device for transmitting switching information |
| CN109417706A (en) * | 2016-07-12 | 2019-03-01 | 华为技术有限公司 | Method and apparatus for storing contextual information in a mobile device |
| WO2018090230A1 (en) * | 2016-11-16 | 2018-05-24 | 华为技术有限公司 | Data migration method and device |
| US11283730B2 (en) | 2016-11-16 | 2022-03-22 | Huawei Technologies Co., Ltd. | Data migration method and apparatus |
| CN116647834A (en) * | 2023-07-27 | 2023-08-25 | 南京航空航天大学 | Mobile network communication method and architecture for low-delay and high-reliability service |
| CN116647834B (en) * | 2023-07-27 | 2023-11-14 | 南京航空航天大学 | Mobile network communication method and system for low-delay and high-reliability service |
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