CN100420332C - Cut-in point name path selecting method under shared mode - Google Patents
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Abstract
The present invention discloses a cut-in point name path selecting method under a shared mode. The method is characterized in that under a shared network mode, when an MS in an outer network roams to a shared network, the shared network adopts a parallel mode for selecting APN OI and originating a DNS analytic process, namely that more than one APNOI of a VPLMN is selected randomly; DNS analyses are respectively originated; a GGSN which corresponds to the APN OI successfully analyzed firstly is selected; if all the analyses are failed, the APN OI of an HPLMN is reselected for originating a DNS analysis. The present invention aims at a shared PLMN group network mode for carrying out functional optimization and expansion to the existing APN path selecting algorithm, and effectively solves the problem of APN path selection when a roaming user originates a grouping data service through a shared PLMN. When the roaming user uses the grouping data service through the shared PLMN, the present invention can ensure the equal selected opportunity of each APN OI of the VPLMN, and shortens a PDP activation process.
Description
Technical field
The present invention relates to APN (APN) routing process of packet data protocol in the mobile communication system (PDP) activation process, be meant the APN route selecting method under a kind of shared network pattern especially.
Background technology
By the mobile communications network that some network equipments of Access Network and core net are formed, can be called a public land mobile network (PLMN).Each PLMN has a unique sign, the PLMN sign of just often saying (ID), and PLMN ID is made up of mobile national number (MCC) and mobile network number (MNC).
One of GPRS (GPRS) and Wideband Code Division Multiple Access (WCDMA) (WCDMA) mobile communication system most important function are grouping route and forwarding, and it is finished the addressing of grouped data and transmission work, and it is realized and the state of PDP Context is closely related.Mobile subscriber (MS) will use Packet data service; at first need to activate PDP Context; MS is when activating PDP Context; usually can provide an APN to Serving GPRS Support Node (SGSN); also can not provide APN and obtain an APN by SGSN according to APN routing algorithm, SGSN arrives its pathfinding on the corresponding critical point GPRS Support Node (GGSN) according to this APN.
APN is made up of Access Point Name network identity (APN NI) and Access Point Name operator sign (APN OI) two parts.Wherein, APN NI distributes to ISP or company by the network operator, is equivalent to a sign of its domain name, is used to identify the external network that MS will visit; APN OI is used to indicate the home network that helps MS to insert the GGSN place of the external network that will visit.If APN is provided during the data service of MS initiation packet, wherein APN NI is essential, and APN OI is optionally, if that is: do not provide APN during the data service of MS initiation packet, perhaps only provide APN NI and do not specified APN OI, then selected an APN OI according to APN routing algorithm by SGSN.The default form of APN OI is " MNCyyy.MCCzzz.gprs ", and wherein yyy is the MNC of user HPLMN, and zzz is the MCC of user HPLMN.
Based on above-mentioned situation, do not comprise APN or only contain the activation request of APN NI when SGSN receives MS, when needing to activate PDP Context, at first SGSN will carry out APN NI coupling according to the APN situation that MS provides, and then select proper A PN OI to form complete APN and initiate dns resolution, insert the address of the required GGSN of external network to obtain the user.Therefore, the APN routing process is just selected the process of GGSN.
APN routing algorithm according to 3GPP agreement 23.060 appendix As, MS must select the GGSN of HPLMN when the data service of Home Public Land Mobile Network network (HPLMN) initiation packet, when MS roams into the data service of visit public land mobile network (VPLMN) initiation packet, both can select the GGSN of VPLMN, also can select the GGSN of HPLMN.If do not specify APN OI during the data service of MS initiation packet, then the SGSN of VPLMN preferentially selects the GGSN of VPLMN, if the GGSN of HPLMN is selected in failure again.
Along with the fast development of mobile communication business, great changes have taken place in the operation mode of operator.In some specific areas, such as Northern Europe since national area smaller, population is few and the territory of several countries intermeshes, and overlaps independently network if operator builds one separately, not only have high input and utilance not high.In addition, because area is little, mobile subscriber's moving frequently between several countries makes international roaming frequently take place.In view of the situation, produced a kind of new network schemer: a cover mobile communications network is built in each operator's cooperation, this network comprises the various device of wireless access network and the SGSN of core net, but do not comprise GGSN, GGSN is dispersed in each operator Operation Network alone, on the agreement this new networking model is called shared network.That is to say that shared network is by a plurality of operators total Access Network, SGSN, and the privately owned network equipments such as GGSN of each operator are formed.
For example, referring to shown in Figure 1, independently network PLMN-A, PLMN-B, PLMN-C and PLMN-S form this shared network by three.Wherein, PLMN-S is the A of operator, B, C cooperation construction, comprises Access Network such as RNC and BSC etc., and the SGSN of CN side; PLMN-S for each operator own together-comprise GGSN separately among PLMN-A, PLMN-B, the PLMN-C respectively, as GGSN-A, GGSN-B, GGSN-C, and related network device etc., but do not comprise Access Network and SGSN.Because GGSN is dispersed among a plurality of PLMN, therefore, is equivalent to this shared network and has had a plurality of GGSN that adhere to separately in different PLMN from the angle of SGSN.
Because the A of operator, B, network PLMN-A, the PLMN-B of C, PLMN-C belong to shared network, so the MS of the relative Home PLMN-A of shared network, PLMN-B, PLMN-C is HPLMN; The network PLMN-M of the M of operator does not belong to this shared network, so the MS of the relative Home PLMN-M of shared network is VPLMN.
With scene shown in Figure 1 is example, suppose that the M of operator has signed roaming agreement with the A of operator, the B of operator, the C of operator respectively, allow the MS of Home PLMN-M to roam into the shared network that PLMN-A, PLMN-B, PLMN-C and PLMN-M form, if APN is not provided during the data service of MS initiation packet or APN NI only is provided, do not specify APN OI, according to the agreement regulation, SGSN preferentially selects the APN OI of VPLMN; Because VPLMN is a shared network, and three APN OI are arranged, promptly APN OI-A, APN OI-B, APN OI-C thus, if should guarantee having equal opportunities of three APN OI, guarantee the dns resolution success again, can't solve according to present agreement regulation.The process that a kind of existing SGSN carries out the APN routing is: select the APN OI of VPLMN to initiate dns resolution at random according to serial mode, Deng before the dns resolution failure once initiated or overtime after, select an APN OI more at random, initiate dns resolution once more, up to the dns resolution success.And, if whole APN OI of VPLMN all resolve failure, select the APN OI of HPLMN to initiate dns resolution again.
Referring to shown in Figure 2, the detailed process of above-mentioned VPN routing is as follows:
Step 201:,, and should have n APN OI by shared PLMN to shared PLMN initiation packet data service when the MS in the outer net roams into when sharing PLMN.
Step 202: shared PLMN selects the APN OI of VPLMN at random, i.e. first APNOI, and initiate dns resolution to this APN OI, and wait-for-response then, after receiving response results, execution in step 203.
Step 203: according to the response results of receiving, judge whether success of dns resolution, if the GGSN of this APN OI correspondence is then selected in success, and process ends, if not success, then execution in step 204.
Step 204: among the APN OI that shared PLMN never selected, select an APN OI among the VPLMN once more at random, promptly second APN OI initiates dns resolution, and wait-for-response, after receiving response, and execution in step 205.
Step 205: according to the response results of receiving, judge whether success of dns resolution, if the GGSN of this APN OI correspondence is then selected in success, and process ends, if not success, then execution in step 206.
Step 206: among the APN OI that shared PLMN never selected once more, select an APN OI among the VPLMN at random, promptly n APN OI initiates dns resolution, and wait-for-response, after receiving response, and execution in step 205.Here, comprise n APN OI altogether among the shared PLMN,, mean that then APN OI all initiated DNS if selected n time.
Step 207: according to the response results of receiving, judge whether success of dns resolution, if the GGSN of this APN OI correspondence is then selected in success, and process ends, if not success, then execution in step 208.
Step 208: share PLMN and select the APN OI of HPLMN to initiate the dns resolution process, and wait-for-response.
Step 209: after receiving the dns resolution response, judge whether the dns resolution result is successful, if success then, is selected the corresponding pairing GGSN of APN OI of this response, otherwise, APN routing failure.
From said process as can be seen, in the APN route selecting method in the prior art, owing to adopted the mode of selecting APN OI at random, so this method can guarantee having equal opportunities of each APN OI among the VPLMN.But, also be owing to adopt the serial system of selection, when utilizing this method to carry out routing, behind first dns resolution procedure failure, to select an APN OI to carry out DNS once more and resolve, institute is so that whole PDP activation is elongated.And owing to MS activationary time in the system is fixed, so after in a single day resolving failure repeatedly, will cause MS because of waits for too long, thus it is overtime that PDP is activated, and asks and initiate the PDP activation repeatedly, also may cause PDP to activate failure under extreme case.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method of the APN routing under the shared network pattern, make it can guarantee among the VPLMN can to shorten the dns resolution process again under the selecteed equal-opportunity situation of each APN OI, thereby shorten PDP activation, improve PDP and activate success rate.
In order to achieve the above object, the invention provides the method for the APN routing under the pattern of a kind of shared networking, this method comprises:
A. the mobile terminal roaming in outer net to shared network initiation packet data service request, is not specified APN OI to shared network in this request;
B. after shared network is received the packet traffic requests of this portable terminal, from all sign APN OI of Access Point Name operator of visit public land network VPLMN, select at least two APN OI, comprise the analysis request of described APN OI at least at described two APN OI to the parallel transmission of DNS Server;
If shared network is received the response of DNS Server to described analysis request, and should response resolve correctly, then select the corresponding pairing GGSN of APN OI of this response, process ends;
If shared network is not received the response of DNS Server to described analysis request, and/or all responses of receiving parsings are incorrect, and, after the APN OI that utilizes all VPLMN sent the dns resolution response, execution in step c;
C. shared network is utilized the APN OI of this portable terminal Home PLMN correspondence, send analysis request to DNS Server, if receive the response of DNS Server, and should response resolve correct, select the corresponding pairing GGSN of APN OI of this response, process ends, otherwise, the routing failure finishes.
Parallel mode described in the step b is for sending at least two dns resolution requests simultaneously.
Parallel mode described in the step b is the last analysis request of transmission, and before not receiving response, sends another dns resolution request once more.
Shared network is the response that determines whether to receive DNSServer in the predefined time among step b and/or the step c.
The present invention is directed to and share the PLMN networking model existing APN routing algorithm has been carried out function optimization and expansion, efficiently solve the problem of roamer's APN routing when sharing the data service of PLMN initiation packet.And, when the roamer uses Packet data service by sharing PLMN, use the inventive method, can guarantee VPLMN each APN OI is selecteed has equal opportunities, and can simplify the dns resolution process, shorten the PDP activation process.
Description of drawings
Fig. 1 is the shared network structural representation;
Fig. 2 is a VPLMN APN OI system of selection schematic flow sheet in the prior art;
Fig. 3 is for realizing the specific embodiment one flow process schematic diagram of the inventive method;
Fig. 4 is for realizing the specific embodiment two flow process schematic diagrames of the inventive method.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Core concept of the present invention is: under the shared network pattern, when the MS in the outer net roams into shared network, shared network adopts parallel mode to select APN OI, initiate the process of dns resolution, promptly select an APN OI at random, initiate dns resolution respectively, and select to resolve earlier the GGSN of successful APN OI correspondence with last VPLMN, if all resolve failure, select the APN OI of HPLMN to initiate dns resolution again.
Here, parallel mode among the present invention is meant that shared network is when initiating the dns resolution process, have at least two processes of initiating dns resolution to walk abreast, and, these two initiation processes can be strict walking abreast, and promptly initiate simultaneously, also can be undemanding parallel, promptly before the response of not receiving the dns resolution process that has initiated the front, initiate the dns resolution process once more one time.
Figure 3 shows that VPLMN APN OI system of selection schematic flow sheet.
Referring to shown in Figure 3, the present invention realizes that the detailed process of VPLMN APN OI selection is as follows:
Step 301: outer net MS roams into and shares the data service of PLMN initiation packet, and shared PLMN has n APN OI.
Step 302: share PLMN from n APN OI, parallel APNOI to all VPLMN initiates the dns resolution process.
Step 304: mark is set, and record is selected this APN OI to initiate dns resolution and has been received response, and continue then to wait for and select other APN OI to initiate the dns resolution request responding, after receiving second DNS response, execution in step 305.
Step 305: judge that whether successfully the dns resolution result, if successfully, then selects the GGSN of this APN OI correspondence, process ends, if unsuccessful, then execution in step 306.
Step 306: mark is set waits for other dns resolution request responding, if determine all to resolve successful APN OI always according to the resolution response of receiving, until when receiving last response, promptly n respond after, execution in step 307.
Step 307: judge whether n dns resolution result be successful, if the corresponding pairing GGSN of APN OI of this response is then selected in success, otherwise, execution in step 308.
Step 308: share PLMN and select the APN OI of HPLMN to initiate the dns resolution process, and wait-for-response.
Step 309: after receiving the dns resolution response, judge whether this analysis result is successful, if the corresponding pairing GGSN of APN OI of this response is then selected in success, otherwise, the routing failure.
Embodiment one is the parallel dns resolution process of initiating, but because it is overtime to relate to the time of activating PDP Context in actual application, in step 301～309 processes, may occur overtime and situation failure, so below describe technical scheme of the present invention in detail for second embodiment again, this embodiment has further increased by two timer T1 and T2, is used to share two routing processes of APN OI that PLMN selects APN OI among the portable terminal VPLMN and HPLMN regularly.And protection timer T1 and sum that T2 fixes time are smaller or equal to once activating the PDP time.
Referring to shown in Figure 4, present embodiment realizes that the detailed process of APN routing is as follows:
Step 401: share PLMN when MS roams into,, and wherein do not specify APN OI to shared PLMN initiation packet data service.Here, the GGSN that shares PLMN is dispersed among n the PLMN, and promptly should share PLMN has n APN OI.
Step 402: shared PLMN to n APN OI, initiates the dns resolution process respectively at random.
Step 403: share PLMN and start protection timer T1, flow state is set for waiting for the dns resolution response.
Step 404: judge whether protection timer T1 is overtime, if overtime, execution in step 409, otherwise, after receiving a DNS response, execution in step 405.
Step 405: judge whether the dns resolution result is successful, if this pairing GGSN of APN OI of correspondence is as a result then selected in success, jumps out this flow process, otherwise, return step 406.
Step 406: judge whether protection timer T1 is overtime, if overtime, then execution in step 409, otherwise, when receiving the second response, execution in step 407.
Step 407: judge whether the dns resolution result is successful, if this pairing GGSN of APN OI of correspondence is as a result then selected in success, jumps out this flow process, otherwise, return step 408.
Step 408: protection timer T1 do not have overtime before; judge whether the next one response of receiving is successful; if success; then select this pairing GGSN of APN OI of correspondence as a result, jump out this flow process, otherwise; return step 408; after receiving n APN OI, still after the parsing failure, then execution in step 409.
Step 409: select the APNOI of HPLMN to initiate dns resolution, start protection timer T2, flow state is set does not wait for the dns resolution response.
Step 410: judge whether protection timer T2 is overtime, if overtime, then jumps out this flow process, otherwise, wait-for-response, after receiving resolution response, execution in step 411.
Step 411: judge whether this resolution response of receiving is successful, if this pairing GGSN of APN OI of correspondence is as a result then selected in success, otherwise, routing failure, process ends.
From said process as can be seen, method of the present invention can significantly shorten the dns resolution process.Suppose to share VPLMN and have n APN OI, if adopt prior art so, need the dns resolution process at most n+1 time, could obtain the GGSN address, and utilize the method for the above embodiment of the present invention to need twice at most, this method is compared the dns resolution process that can reduce n-1 time with prior art, thereby significantly reduce PDP activation process time delay, promptly satisfied the demand of shared PLMN networking mode, can guarantee to roam MS again and activate PDP, the activation success rate is provided with the shortest time.
Certainly, all be that the APN OI to all VPLMN has carried out dns resolution among above-mentioned two embodiment, in actual applications, only needing two resolvings is parallel getting final product of carrying out.Such as, can be that the initiation that removes two parsings walks abreast, all other is serial; Also can be that APN OI with all VPLMN is divided into some groups, be serial in every group, and have at least two groups be walk abreast can reduce PDP activation process time delay.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (4)
1. APN route selecting method under the shared network pattern is characterized in that this method may further comprise the steps:
A. the mobile terminal roaming in outer net to shared network initiation packet data service request, is not specified the sign APN OI of Access Point Name operator to shared network in this request;
B. after shared network is received the packet traffic requests of this portable terminal, from all APN OI of visit public land network VPLMN, select at least two APN OI, comprise the analysis request of described APN OI at least at described two APN OI to the parallel transmission of DNS Server;
If shared network is received the response of DNS Server to described analysis request, and should the response indication resolve correctly, then select the corresponding pairing GGSN of APN OI of this response, process ends;
If shared network is not received the response of DNS Server to described analysis request, and/or all responses of receiving parsings are incorrect, and, after the APN OI that utilizes all VPLMN sent the dns resolution response, execution in step c;
C. shared network is utilized the APN OI of this portable terminal Home PLMN correspondence, send analysis request to DNS Server, if receive the response of DNS Server, and should response resolve correct, select the corresponding pairing GGSN of APN OI of this response, process ends, otherwise, the routing failure finishes.
2. method according to claim 1 is characterized in that, parallel mode described in the step b is for sending at least two dns resolution requests simultaneously.
3. method according to claim 1 is characterized in that, parallel mode described in the step b is the last analysis request of transmission, and before not receiving response, sends another dns resolution request once more.
4. method according to claim 1 is characterized in that, shared network is the response that determines whether to receive DNS Server in the predefined time among step b and/or the step c.
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| CN100464595C (en) * | 2006-07-06 | 2009-02-25 | 华为技术有限公司 | Method for obtaining user cut-in homing GGSN and net element device |
| CN101730184A (en) * | 2009-11-23 | 2010-06-09 | 中兴通讯股份有限公司 | Dialing method and system based on APN self adaption |
| EP2632201B1 (en) * | 2011-11-25 | 2017-11-08 | Huawei Technologies Co., Ltd. | Method and device for network access |
| JP6325664B2 (en) * | 2013-06-28 | 2018-05-16 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Data transmission method and gateway |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1376350A (en) * | 1999-10-22 | 2002-10-23 | 诺基亚公司 | Activating packet data protocol context for roaming subscriber |
| WO2003015353A1 (en) * | 2001-08-09 | 2003-02-20 | Nokia Corporation | Enabling active pdp contexts in additional plmns according to home operator information and/or subnetwork information |
| KR20040032630A (en) * | 2002-10-10 | 2004-04-17 | 엘지전자 주식회사 | Service Providing Method in Mobile Communication System |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1376350A (en) * | 1999-10-22 | 2002-10-23 | 诺基亚公司 | Activating packet data protocol context for roaming subscriber |
| WO2003015353A1 (en) * | 2001-08-09 | 2003-02-20 | Nokia Corporation | Enabling active pdp contexts in additional plmns according to home operator information and/or subnetwork information |
| KR20040032630A (en) * | 2002-10-10 | 2004-04-17 | 엘지전자 주식회사 | Service Providing Method in Mobile Communication System |
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