CN1780476A - Method for supporting node route domain updation in universal wireless group service - Google Patents
Method for supporting node route domain updation in universal wireless group service Download PDFInfo
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Abstract
The method includes following steps: a) the mobile station sends request for renewing routing area to the SGSN; the SGSN decides if the routing area before renewing belongs to SGSN; if yes, enters into step b; otherwise, enters into the process of renewing routing area between SGSN, and ends the renewing process for current routing area; b) after the SGSN adds 1 to the times of renewing routing area in SGSN, and decides if there is the subscription information of mobile station in SGSN; if yes, enters into step c; otherwise, SGSN informs the mobile station to initialize its own state variable; and then makes process of renewing routing area in SGSN, and ends the renewing process in local routing area; c) adds 1 to the times of successfully renewing routing area in SGSN, and the mobile station informs the completion of renewing SGSN routing area.
Description
Technical field
The present invention relates to GPRS Routing Area Update technology, relate in particular to the SGSN routing region updating method after a kind of base station controller/packet control unit cutover.
Background technology
GPRS (GPRS) is the communication system of upgrading on global system for mobile communications (GSM) basis, it adopts the mode of packet switching, utilize statistic multiplexing and dynamic multiplexing technology, make each user in the GPRS network can select a plurality of wireless channels for use, and a wireless channel also can be shared by a plurality of users.
In GPRS network shown in Figure 1, Serving GPRS Support Node (SGSN) is a major function node wherein, it links to each other with Gateway GPRS Support Node (GGSN) by gn interface, link to each other with attaching position register (HLR)/AUC (AUC) by Gr interface, link to each other with short message service center (SMC) by the Gd interface, link to each other with business control nodes (SCP) by the Ge interface, link to each other with critical point mobile location centre Chinese (GMLC) by Lg interface, link to each other with mobile switching centre (MSC)/VLR Visitor Location Register (VLR) by Gs interface, link to each other with GPRS Support Node (GSN) in other Public Land Mobile Nerwork (PLMN) by gp interface, link to each other with GSM base station sub-system (BSS) by Gb Interface, and link to each other with charging gateway (CG) by the Ga interface.
In the GPRS network, be to guarantee the mobile management between travelling carriage (MS) and the SGSN, when the position of MS and state changes or MS in periodicity Routing Area Update timer expiry, MS will initiate Routing Area Update.Only under the Routing Area Update case of successful, MS can be attached on the SGSN, thereby normally inserts GPRS network; Otherwise the phenomenon of net will appear falling in MS.
The GPRS Routing Area Update comprises between intra-SGSN routing area update (Intra-SGSN RAU) and the SGSN two types of Routing Area Updates (Inter-SGSN RAU).Wherein, Intra-SGSN RAU is meant that two route districts before and after the MS renewal belong to same SGSN; Inter-SGSN RAU is meant that then two route districts before and after the MS renewal belong to different SGSN.In order to weigh the quality of Intra-SGSN RAU, stipulated these performance index of Intra-SGSN RAU success rate in the 3GPP agreement, its implication is the ratio that Intra-SGSN RAU number of success and Intra-SGSN RAU initiate number of times.Intra-SGSN RAU success rate height then shows the easier access GPRS network of MS, easier of on the SGSN, and then is obtained high-quality network service.
Each SGSN that works in the GPRS network all has limited ability to work, promptly each SGSN adhere to number of users and the data service flow is limited.In GPRS existing network operation maintenance process, sudden telephone traffic phenomenon pockety appears through regular meeting, be that the zone that some SGSN administer becomes the hot spot region that has a large amount of MS users in a period of time, above-mentioned SGSN since its adhere to number of users and data service flow near or reach the system specification, and be at full capacity even the state of overload operation; Simultaneously, other SGSN is because of adhering to the less idle condition that is in of number of users.For example, the system specification capacity of SGSN1 and SGSN2 is 10 general-purpose families, and the GPRS number of users that adheres on SGSN1 and the SGSN2 under the normal condition is about 80,000.If but in the zone that SGSN1 administered, hold certain business activity or competitive sports, the a large amount of GPRS users that then originally were attached to SGSN2 gather the zone that belongs to SGSN1, cause the system specification that number of users has met or exceeded 10 general-purpose families of adhering on the SGSN1; And simultaneously, the number of users that adheres on the SGSN2 reduces in a large number, makes SGSN2 be in comparatively idle state, and above-mentioned situation has just caused SGSN1 and SGSN2 to go up the non-uniform phenomenon that telephone traffic distributes.
In order more effectively to use Internet resources, ensure service quality, the SGSN telephone traffic is appearring when inhomogeneous, the number of users that adheres on the different SGSN need be adjusted and redistributed, concrete grammar is: a part of BSC/PCU cutover that SGSN administered that will be in overload is to idle SGSN.As shown in Figure 2, SGSN1 has administered BSC/PCU1 to BSC/PCUn, SGSN2 has administered BSC/PCUt to BSC/PCUt+m, owing to SGSN1 adheres to that the user is more, when SGSN2 adheres to that the user is less the telephone traffic skewness to occur, by with BSC/PCUn from the SGSN1 cutover to SGSN2, and make the MS that belongs to BSC/PCUn be attached on the SGSN2, and then alleviated the load of SGSN1, utilized the resource of SGSN2 simultaneously fully.After cutover was finished, the scope of SGSN1 administration became by BSC/PCU1 to BSC/PCUn-1, and the compass of competency of SGSN becomes BSC/PCUn and by BSC/PCUt to BSC/PCUt+m.
After the cutover of finishing BSC/PCU, when changed by the route district of cutover MS or its periodically Routing Area Update timer expiry the time, above-mentioned MS will initiate Routing Area Update.As shown in Figure 3, the Routing Area Update in the gprs system may further comprise the steps:
Step 301.MS sends RAU Request message to SGSN, and Routing Area Update is initiated in request.
In the RAU Request message that MS sent, carry packet TMSI (P-TMSI) and represent MS to upgrade former Routing Area Identifier (OLD RAI) cell of route district, preceding place information.
SGSN judges according to the OLD RAI cell that carries in the receiving RAU Request message whether the route district before upgrading belongs to the compass of competency of this SGSN herein.
As shown in Figure 4, Intra-SGSN RAU handling process may further comprise the steps:
Step 401.SGSN adds 1 with Intra-SGSN RAU request number of times.
Because SGSN has determined that this MS carries out the route district at place before and after the Routing Area Update and all belongs to the compass of competency of self, therefore Intra-SGSN RAU flow process at the very start Intra-SGSN RAU request number of times is added 1, as the denominator in the Intra-SGSN RAU success rate computing formula.
Step 402.SGSN judges whether self exists the CAMEL-Subscription-Information of this MS, if then execution in step 403; Otherwise, execution in step 406.
SGSN at the CAMEL-Subscription-Information of self inquiring about this MS, if there is CAMEL-Subscription-Information, shows that then this MS can continue to insert this SGSN according to the P-TMSI cell that carries in the receiving RAU Request message; Otherwise this MS can not insert this SGSN.
Find at SGSN under the situation of this MS CAMEL-Subscription-Information, send RAU Accept message, indicate the Routing Area Update of accepting this MS, and the number of success of Intra-SGSN RAU is added 1 to MS; After MS receives the RAU Accept message of SGSN, upgrade position and the identity information preserved in the MS, and return RAU Complete message to SGSN; SGSN knows that by receiving RAU Complete message the Routing Area Update of MS is finished.
Under the situation that does not find this MS CAMEL-Subscription-Information, SGSN sends RAU Reject message to MS, and indicates the former because implicit detach (ImplicitlyDetached) of this Routing Area Update of refusal in this message.MS analyzes Reason For Denial after receiving RAU Reiect message.When Reason For Denial was Implicitly Detached, MS can initiate the attachment flow of 3GPP agreement regulation again; Simultaneously, because SGSN has refused the update request of MS, therefore the Intra-SGSN RAU frequency of failure is added 1.
Regulation according to 3GPP TS 04.64 V8.7.0 agreement, general unacknowledged information pattern (UI) frame that adopts carries out Signalling exchange and transfer of data between SGSN and the MS, and all preserves the numerical value of the non-affirmation send state variable of user V (U) and accepting state variable V (UR) in MS and SGSN.The span of V (U) and V (UR) is 0～511, and overturns in this scope.What V (U) write down is the sequence number of the next UI of transmission frame, and V (UR) then writes down the sequence number of the next UI of reception frame.No matter be SGSN or MS, UI frame of every transmission, the V of self (U) just adds 1; UI frame of every reception, V (UR) just is updated to N (U)+1, and wherein N (U) is the sequence number of UI frame, and N (U) value equals V (U) value of this UI frame transmit leg.In addition, for MS, if N (U) value in the UI frame that receives is positioned within the scope of (V (UR)-32)≤N (U)＜V (UR), and if this MS received the UI frame of identical N (U) value, the UI frame of then this being received abandons.
Be initial value 0 by the V (U) and the V (UR) of the MS of cutover in new SGSN, but V (U) and V (UR) that MS preserves are consistent then with before the cutover.If entrained N (U) is positioned at scope (V (UR)-32)≤N (U)＜V (UR) in the UI frame that SGSN issues, then MS will directly abandon this UI frame.
For example: MS was attached to SGSN1 originally, and once carried out the mutual of UI frame with SGSN1.Suppose 10 descending UI frames of N (U) value from 0 to 9 that MS once received SGSN1 and sends, then V (UR) value of this MS before cutover is 10.After carrying out the BSC/PCU cutover, this MS by cutover to SGSN2.V (U) and V (UR) that this moment, SGSN2 went up at this MS are initial value 0, and SGSN2 N (U) value is also since 0 in the UI frame that MS sends, and V of MS side (U) and V (UR) all remain the preceding numerical value of cutover.After MS receives the descending UI frame of SGSN2, obtain N (U) wherein.For preceding 10 UI frames that SGSN2 issues, its N (U) value is for from 0 to 9, because the value of V (UR) is 10 among the MS, then the value of N (U) all is positioned at (V (UR)-32)≤N (U)＜V (UR) scope in these 10 UI frames; In addition, be 0 to 9 UI frame because MS once received N (U) value that SGSN1 issues, N (U) value of preceding 10 frames that issue with SGSN2 is identical.Therefore, MS directly abandons preceding 10 UI frames that SGSN2 issues.
In such cases, if comprise RAU Reject message in preceding 10 UI frames that SGSN2 sends, and because MS directly abandons above-mentioned message, then MS thinks that network does not respond the RAURequest message of its transmission.Stipulate according to the 3GPP agreement, this MS will constantly repeat to be judged as by SGSN2 the Intra-SGSN RAU flow process of failure in a period of time, therefore increase the number of times of Intra-SGSN RAU failure procedures, had a strong impact on the success rate index, increased the signaling burden of system simultaneously.
In order to overcome the shortcoming of such scheme, adopt Intra-SGSN RAU flow process as shown in Figure 5 usually, this flow process may further comprise the steps:
The description and the processing method of step 401～405 are identical in the description of step 501～505 and processing method and the method shown in Figure 4.
Step 506.SGSN sends identification request (Identity Request) message to MS, and the IMSI International Mobile Subscriber Identity (IMSI) of asking this MS starts simultaneously and waits for identification response (IdentityResponse) message timer T3370.
Step 507.SG0000SN judges before waiting for identification response message timer expiry whether receive Identity Response message, if return execution in step 503; Otherwise, execution in step 508.
Step 508.SGSN judges whether to reach Identity Request message maximum number of retransmissions, if then execution in step 509; Otherwise, return execution in step 506.
In gprs system, the network maintenance staff can set in advance the Identity Request message maximum number of retransmissions of SGSN, and an Identity Request of the every transmission of SGSN message, and just the transmission number of times with this message adds 1.
Waiting for that the overtime and SGSN of identification response message timer does not receive under the situation of IdentityResponse message, SGSN in this step according to the number of times that has sent Identity Request message and the decision of the relation between its maximum number of retransmissions whether once more to MS transmission IdentityRequest message.
When the repeating transmission number of times of Identity Request message reached the maximum number of retransmissions that sets in advance, SGSN was by issuing RAU Reject message to MS, and indicated the former because Implicitly Detached of this Routing Area Update of refusal in this message; SGSN adds 1 with the Intra-SGSN RAU frequency of failure then.
According to agreement regulation, downlink signaling of the every transmission of SGSN, N (U) entrained in the UI frame adds 1, then adopts step 501 when step 510 is carried out Intra-SGSN RAU, an Identity Request of every transmission message, and N (U) adds 1.Therefore, by retransmitting Identity Request message, make N (U) value can jump out the scope of (V (UR)-32)≤N (U)＜V (UR) fast, thereby make that MS can normal handling and the message that issues of response SGSN, reduce Intra-SGSN RAU the frequency of failure, improve the success rate of this flow process.But this method still has the following disadvantages:
1. because this method does not have in SGSN under the situation of MS CAMEL-Subscription-Information, and SGSN retransmits Identity Request message by BSC/PCU for many times to MS, therefore at the cutover initial stage, the signaling traffic of SGSN and BSC/PCU burden is heavier, influences the performance of gprs system;
2.MS before the message that normal process SGSN issues, still will experience the repeatedly Intra-SGSN RAU flow process of failure, can't fundamentally solve the not high problem of Intra-SGSN RAU success rate.
Summary of the invention
In view of this, the object of the present invention is to provide the routing region updating method after a kind of BSC/PCU cutover, improve the success rate of Intra-SGSN RAU.
For achieving the above object, the invention provides the routing region updating method after a kind of BSC/PCU cutover, this method may further comprise the steps:
A. travelling carriage is after SGSN sends the Routing Area Update request, and SGSN judges whether the route district before this travelling carriage upgrades belongs to this SGSN, if, execution in step B then, otherwise, carry out Routing Area Update handling process between the SGSN, and finish this Routing Area Update flow process;
B.SGSN adds 1 with the intra-SGSN routing area update request number of times, judge the CAMEL-Subscription-Information that whether has travelling carriage among this SGSN then, if, execution in step C then, otherwise, SGSN notice travelling carriage then carries out the state variable initialization of self the follow-up flow process of intra-SGSN routing area update, and finishes this Routing Area Update flow process;
Its Routing Area Update request of C.SGSN notice travelling carriage is accepted, and the intra-SGSN routing area update number of success is added 1, and travelling carriage knows that the Routing Area Update request is accepted back notice SGSN Routing Area Update and finishes.
The follow-up flow process of the described intra-SGSN routing area update of step B may further comprise the steps:
Its Routing Area Update request of B11.SGSN notice travelling carriage is rejected, and the intra-SGSN routing area update frequency of failure is added 1;
B12. travelling carriage notice SGSN has finished the initialization of oneself state variable, and travelling carriage starts attachment flow then.
The follow-up flow process of the described intra-SGSN routing area update of step B may further comprise the steps:
B21.SGSN notice travelling carriage reports identification information;
B22. travelling carriage notice SGSN has finished the initialization of oneself state variable, and sends the identification information of self to SGSN;
Its Routing Area Update request of B23.SGSN notice travelling carriage is accepted, and the intra-SGSN routing area update number of success is added 1, and travelling carriage knows that the Routing Area Update request is accepted back notice SGSN Routing Area Update and finishes.
Set in advance the identification switch, then the follow-up flow process of the described intra-SGSN routing area update of step B may further comprise the steps:
B31.SGSN judges whether the identification switch is opened, if, execution in step B32 then, otherwise, execution in step B35;
B32.SGSN notice travelling carriage reports identification information;
B33. travelling carriage notice SGSN has finished the initialization of oneself state variable, and sends the identification information of self to SGSN;
Its Routing Area Update request of B34.SGSN notice travelling carriage is accepted, and the intra-SGSN routing area update number of success is added 1, and travelling carriage knows that the Routing Area Update request is accepted back notice SGSN Routing Area Update and finishes, and finishes this Routing Area Update flow process then;
Its Routing Area Update request of B35.SGSN notice travelling carriage is rejected, and the intra-SGSN routing area update frequency of failure is added 1;
B36. travelling carriage notice SGSN has finished the initialization of oneself state variable, and travelling carriage is carried out attachment flow then.
Described state variable comprises at least: non-affirmation send state variable and accepting state variable.
The described SGSN notice of step B travelling carriage with the initialized method of the state variable of travelling carriage is: SGSN sends logical links GPRS mobile management reset request message to travelling carriage.
The initialized method that described travelling carriage notice SGSN has finished the oneself state variable is: travelling carriage sends the logical links GPRS mobile management acknowledge message that resets to SGSN.
The described travelling carriage of steps A to the method that SGSN sends the Routing Area Update request is: travelling carriage sends the Routing Area Update request message to SGSN;
The received method of described SGSN notice its Routing Area Update request of travelling carriage of step C is: SGSN sends Routing Area Update to travelling carriage and accepts message;
The method that the described travelling carriage notice of step C SGSN Routing Area Update is finished is: travelling carriage sends Routing Area Update to SGSN and finishes message.
The unaccepted method of described SGSN notice its Routing Area Update request of travelling carriage is: SGSN issues Routing Area Update Reject message to travelling carriage.
Described SGSN notice travelling carriage reports the method for identification information to be: SGSN sends the identification request message to travelling carriage;
Described travelling carriage to the method that SGSN sends self identification information is: travelling carriage sends the identification response message that carries self identification information to SGSN.
Use the present invention, gprs system can improve the success rate of Intra-SGSNRAU rapidly after the BSC/PCU cutover.Particularly, the present invention has following beneficial effect:
1. use method of the present invention, in the Intra-SGSN RAU flow process after the BSC/PCU cutover, if there is not the CAMEL-Subscription-Information of MS among the SGSN, then issue LLGMM-RESET-REQ message to MS by SGSN, require MS that V (U) and V (UR) are set to initial value 0, guarantee that MS can not abandon the message of SGSN, reduce the frequency of failure of Intra-SGSN RAU, improve the Intra-SGSN RAU success rate after the BSC/PCU cutover, and then improved the overall performance of system;
2. the present invention can make the MS after the cutover complete successfully Intra-SGSN RAU rapidly, and is attached on the SGSN, has avoided the continuous repeating transmission of message, has effectively alleviated the signaling traffic burden of gprs system, has saved system resource;
3. owing to the MS after the cutover among the present invention can complete successfully Intra-SGSNRAU at short notice, shortened the crank-up time of system after the BSC/PCU cutover, thereby improved network service quality;
4. the present invention has increased a little step on original Intra-SGSN RAU process base, realizes comparatively simple.
Description of drawings
Fig. 1 is the GPRS network structure chart.
Fig. 2 is a BSC/PCU cutover schematic diagram in the GPRS network.
Fig. 3 is the Routing Area Update flow chart after the BSC/PCU cutover in the GPRS network.
Fig. 4 is the Intra-SGSN RAU flow chart after the existing BSC/PCU cutover.
Fig. 5 is the improvement Intra-SGSN RAU flow chart after the existing BSC/PCU cutover.
Fig. 6 carries out improved Intra-SGSN RAU flow chart for the embodiment of the invention 1 on Fig. 4 basis.
Fig. 7 carries out improved Intra-SGSN RAU flow chart for the embodiment of the invention 2 on Fig. 5 basis
Fig. 8 for the embodiment of the invention 3 with Fig. 4 and Fig. 5 in conjunction with after carry out Intra-SGSN RAU flow chart after the improved BSC/PCU cutover.
Embodiment
For making purpose of the present invention, technical scheme clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
The present invention is the routing region updating method after a kind of BSC/PCU cutover, its basic thought is: if there is not the CAMEL-Subscription-Information of MS among the SGSN after the cutover, then introduce and comprise logical links GPRS mobile management reset request (LLGMM-RESET-REQ) message and the logical links GPRS mobile management logic link control of affirmation (LLGMM-RESET-CNF) message (LLC RESET) flow process that resets that resets, make MS that self V (U) and V (UR) are set to initial value 0, thereby be consistent with SGSN again, with the message that guarantees that MS can normal process SGSN issues, improve the Intra-SGSN RAU success rate after the cutover.
The present invention can be respectively be optimized the Intra-SGSNRAU flow process after Fig. 4 or the existing BSC/PCU cutover shown in Figure 5, also can the Intra-SGSN RAU flow process after two kinds of existing BSC/PCU cutovers in conjunction with after be optimized.
Embodiment 1: introduce LLC RESET flow process in the Intra-SGSN RAU flow process after simple existing BSC/PCU cutover.
As shown in Figure 6, present embodiment has increased LLC RESET flow process on the basis of Fig. 4.Intra-SGSN RAU flow process after the BSC/PCU cutover of this moment may further comprise the steps:
The description and the processing method of step 401～405 are identical in the description of step 601～605 and processing method and the method shown in Figure 4.
Step 606.SGSN sends LLGMM-RESET-REQ message to MS, carries out parameter negotiation with MS.
In this step, SGSN impels MS that V (U) and V (UR) are set to initial value 0 by sending LLGMM-RESET-REQ message.
Step 607～610.SGSN issues RAU Reject message to MS, and the Intra-SGSNRAU frequency of failure is added 1; MS starts attachment flow after SGSN sends LLGMM-RESET-CNF message.
In the present embodiment, SGSN adopts the directly mode of refusal MS Routing Area Update, and promptly sending Reason For Denial to MS is the RAU Reject message of Implicitly Detached, and SGSN adds 1 with the Intra-SGSN RAU frequency of failure.
For MS, at first send LLGMM-RESET-CNF message to SGSN, indicate the initialization that the MS side has been finished V (U) and V (UR); Then, MS restarts the attachment flow of 3GPP agreement regulation, be MS to SGSN send carry the IMSI cell adhere to request (AttachRequest) message after, SGSN obtains the CAMEL-Subscription-Information of this MS from HLR according to the IMSI cell, and return to MS and to adhere to acceptance (Attach Aceept) message, MS sends to adhere to SGSN again and finishes (Attach Complete) message then, indicates this MS and successfully has been attached to SGSN.
Similarly, because V (U) and the V (UR) of MS all be cleared, then MS thinks and self never received any UI frame; In addition, because V (U) and V (UR) among SGSN and the MS are 0, then SGSN and MS carry out the UI frame when mutual first, and N (U) also equals 0, and N (U) is not positioned within (V (UR)-32)≤N (U)＜V (UR) scope that agreement stipulates at this moment.Therefore MS can normally receive the message that comes from SGSN after initialization, and it directly can not abandoned.
Process above-mentioned steps 607 is to step 610, though the Intra-SGSN RAU of this MS failure, but when MS initiated the Routing Area Update request once more, owing to preserved the CAMEL-Subscription-Information of this MS on the SGSN, then MS can success finished Intra-SGSN RAU.
Embodiment 2: introduce LLC RESET flow process in the Intra-SGSN RAU flow process after improved existing BSC/PCU cutover.
As shown in Figure 7, present embodiment has increased LLC RESET flow process on the basis of Fig. 5.Intra-SGSN RAU flow process after the BSC/PCU cutover of this moment may further comprise the steps:
The description and the processing method of step 401～405 are identical in the description of step 701～705 and processing method and the method shown in Figure 4.
Step 706.SGSN sends LLGMM-RESET-REQ message to MS, carries out parameter negotiation with MS.
In this step, SGSN impels MS that V (U) and V (UR) are set to initial value 0 by sending LLGMM-RESET-REQ message.
Step 707～709.SGSN sends Identity Request message to MS, and MS sends LLGMM-RESET-CNF message and Identity Response message to SGSN successively then, and returns execution in step 703.
At first by send Identity Request message to MS, request obtains the IMSI of this MS to SGSN herein; Then, MS sends to SGSN with LLGMM-RESET-CNF message, indicates the initialization that MS has finished V (U) and V (UR); Then, MS sends IdentityResponse message to SGSN again, and the IMSI of this MS is uploaded to SGSN; SGSN returns execution in step 703 after obtaining the CAMEL-Subscription-Information of this MS according to the IMSI cell from HLR, proceeds the follow-up flow process of Intra-SGSNRAU.
In the present embodiment, do not exist in SGSN under the situation of MS CAMEL-Subscription-Information, because V (U) and the V (UR) of MS all be cleared, then MS thinks and self never received any UI frame; In addition, because V (U) and V (UR) among SGSN and the MS are 0, when then SGSN and MS carried out interaction message first, N (U) also equaled 0, and N this moment (U) is not positioned within (V (UR)-32)≤N (U)＜V (UR) scope of agreement regulation.Therefore MS can normally receive the message that comes from SGSN after initialization, and it directly can not abandoned.
Embodiment 3: introduce LLC RESET flow process after the Intra-SGSN RAU flow process after two kinds of existing BSC/PCU cutovers is combined.
Present embodiment has increased the identification switch in SGSN, so that SGSN is by judging the state of identification switch, decision is carried out follow-up alternant way with MS.
As shown in Figure 8, the method for the Intra-SGSN RAU success rate after the present embodiment raising BSC/PCU cutover may further comprise the steps:
The description and the processing method of step 401～405 are identical in the description of step 801～805 and processing method and the method shown in Figure 4.
Step 806.SGSN sends LLGMM-RESET-REQ message to MS, carries out parameter negotiation with MS.
In this step, SGSN impels MS that V (U) and V (UR) are set to initial value 0 by sending LLGMM-RESET-REQ message.
Step 807.SGSN judges whether the identification switch is opened, if then execution in step 808; Otherwise, execution in step 811.
In this step, SGSN carries out follow-up alternant way by the state decision of judging the identification switch with MS, if i.e. identification switch opens, then SGSN takes to continue to finish the mode of Routing Area Update flow process after MS asks its IMSI; Otherwise SGSN takes to refuse earlier the MS Routing Area Update, then impels MS to start the mode of attachment flow.
Step 808～810.SGSN sends Identity Request message to MS, and MS sends LLGMM-RESET-CNF message and Identity Response message to SGSN successively then, and returns execution in step 803.
At first by send Identity Request message to MS, request obtains the IMSI of this MS to SGSN herein; Then, MS sends to MS with LLGMM-RESET-CNF message, indicates the initialization that the MS side has been finished V (U) and V (UR); Then, MS sends IdentityResponse message to SGSN again, and the IMSI of this MS is uploaded to SGSN; SGSN returns execution in step 803 after obtaining the CAMEL-Subscription-Information of this MS according to the IMSI cell from HLR, proceeds the follow-up flow process of Intra-SGSNRAU.
Because V (U) and the V (UR) of MS all are cleared, then MS thinks and self never received any UI frame; In addition, because V (U) and V (UR) among SGSN and the MS are 0, when then SGSN and MS carried out interaction message first, N (U) also equaled 0, and N this moment (U) is not positioned within (V (UR)-32)≤N (U)＜V (UR) scope of agreement regulation.Therefore MS can normally receive the message that comes from SGSN after initialization, and it directly can not abandoned.
Step 811～814.SGSN issues RAU Reject message to MS, and the Intra-SGSNRAU frequency of failure is added 1; MS starts attachment flow after SGSN sends LLGMM-RESET-CNF message.
Because the identification switch do not open, so SGSN adopts the directly mode of refusal MS Routing Area Update, be the RAU Reject message of Implicitly Detached to MS transmission Reason For Denial promptly, and SGSN adds 1 with the Intra-SGSN RAU frequency of failure.
For MS, at first send LLGMM-RESET-CNF message to SGSN, indicate the initialization that the MS side has been finished self V (U) and V (UR); Then, MS restarts the attachment flow of 3GPP agreement regulation, be that MS is after the SGSN transmission carries the Attach Request message of IMSI cell, SGSN obtains the CAMEL-Subscription-Information of this MS from HLR according to the IMSI cell, and return Attach Accept message to MS, MS sends Attach Complete message to SGSN more then, indicates this MS and has successfully inserted SGSN.
Similarly, because V (U) and the V (UR) of MS all be cleared, then MS thinks and self never received any UI frame; In addition, because V (U) and V (UR) among SGSN and the MS are 0, when then SGSN and MS carried out interaction message first, N (U) also equaled 0, and N this moment (U) is not positioned within (V (UR)-32)≤N (U)＜V (UR) scope of agreement regulation.Therefore MS can normally receive the message that comes from SGSN after initialization, and it directly can not abandoned.
Process above-mentioned steps 811 is to step 814, though the Intra-SGSN RAU of this MS failure, but when MS initiated the Routing Area Update request once more, owing to preserved the CAMEL-Subscription-Information of this MS on the SGSN, then MS can success finished Intra-SGSN RAU.
By above-mentioned flow process as seen, under the situation of identification switch opens, the MS after the BSC/PCU cutover can successfully realize Intra-SGSN RAU immediately in new SGSN; And under the situation that the identification switch cuts out, the MS after the cutover need be through the SGSN that is attached to that can be successful after the Intra-SGSN RAU flow process of once failure.
Use method of the present invention, can successfully be attached to SGSN in the attachment flow that follows closely after RAU flow process of Intra-SGSN first that MS initiates or the Intra-SGSN RAU failure first after cutover, significantly reduce the frequency of failure of Intra-SGSN RAU after the cutover, thereby effectively raised the Intra-SGSN RAU success rate after the cutover.
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 made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, the routing region updating method after a kind of BSC/PCU cutover is characterized in that this method may further comprise the steps:
A. travelling carriage is after SGSN sends the Routing Area Update request, and SGSN judges whether the route district before this travelling carriage upgrades belongs to this SGSN, if, execution in step B then, otherwise, carry out Routing Area Update handling process between the SGSN, and finish this Routing Area Update flow process;
B.SGSN adds 1 with the intra-SGSN routing area update request number of times, judge the CAMEL-Subscription-Information that whether has travelling carriage among this SGSN then, if, execution in step C then, otherwise, SGSN notice travelling carriage then carries out the state variable initialization of self the follow-up flow process of intra-SGSN routing area update, and finishes this Routing Area Update flow process;
Its Routing Area Update request of C.SGSN notice travelling carriage is accepted, and the intra-SGSN routing area update number of success is added 1, and travelling carriage knows that the Routing Area Update request is accepted back notice SGSN Routing Area Update and finishes.
2, the method for claim 1 is characterized in that, the follow-up flow process of the described intra-SGSN routing area update of step B may further comprise the steps:
Its Routing Area Update request of B11.SGSN notice travelling carriage is rejected, and the intra-SGSN routing area update frequency of failure is added 1;
B12. travelling carriage notice SGSN has finished the initialization of oneself state variable, and travelling carriage starts attachment flow then.
3, the method for claim 1 is characterized in that, the follow-up flow process of the described intra-SGSN routing area update of step B may further comprise the steps:
B21.SGSN notice travelling carriage reports identification information;
B22. travelling carriage notice SGSN has finished the initialization of oneself state variable, and sends the identification information of self to SGSN;
Its Routing Area Update request of B23.SGSN notice travelling carriage is accepted, and the intra-SGSN routing area update number of success is added 1, and travelling carriage knows that the Routing Area Update request is accepted back notice SGSN Routing Area Update and finishes.
4, the method for claim 1 is characterized in that, sets in advance the identification switch, and then the follow-up flow process of the described intra-SGSN routing area update of step B may further comprise the steps:
B31.SGSN judges whether the identification switch is opened, if, execution in step B32 then, otherwise, execution in step B35;
B32.SGSN notice travelling carriage reports identification information;
B33. travelling carriage notice SGSN has finished the initialization of oneself state variable, and sends the identification information of self to SGSN;
Its Routing Area Update request of B34.SGSN notice travelling carriage is accepted, and the intra-SGSN routing area update number of success is added 1, and travelling carriage knows that the Routing Area Update request is accepted back notice SGSN Routing Area Update and finishes, and finishes this Routing Area Update flow process then;
Its Routing Area Update request of B35.SGSN notice travelling carriage is rejected, and the intra-SGSN routing area update frequency of failure is added 1;
B36. travelling carriage notice SGSN has finished the initialization of oneself state variable, and travelling carriage is carried out attachment flow then.
5, as claim 1,2,3 or 4 described methods, it is characterized in that described state variable comprises at least: non-affirmation send state variable and accepting state variable.
6, the method for claim 1 is characterized in that, the described SGSN notice of step B travelling carriage with the initialized method of the state variable of travelling carriage is: SGSN sends logical links GPRS mobile management reset request message to travelling carriage.
As claim 2,3 or 4 described methods, it is characterized in that 7, the initialized method that described travelling carriage notice SGSN has finished the oneself state variable is: travelling carriage sends the logical links GPRS mobile management acknowledge message that resets to SGSN.
8, the method for claim 1 is characterized in that, the described travelling carriage of steps A to the method that SGSN sends the Routing Area Update request is: travelling carriage sends the Routing Area Update request message to SGSN;
The received method of described SGSN notice its Routing Area Update request of travelling carriage of step C is: SGSN sends Routing Area Update to travelling carriage and accepts message;
The method that the described travelling carriage notice of step C SGSN Routing Area Update is finished is: travelling carriage sends Routing Area Update to SGSN and finishes message.
As claim 2 or 4 described methods, it is characterized in that 9, the unaccepted method of described SGSN notice its Routing Area Update request of travelling carriage is: SGSN issues Routing Area Update Reject message to travelling carriage.
As claim 3 or 4 described methods, it is characterized in that 10, described SGSN notice travelling carriage reports the method for identification information to be: SGSN sends the identification request message to travelling carriage;
Described travelling carriage to the method that SGSN sends self identification information is: travelling carriage sends the identification response message that carries self identification information to SGSN.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100917252A CN100389633C (en) | 2004-11-25 | 2004-11-25 | Method for supporting node route domain updation in universal wireless group service |
| PCT/CN2005/001945 WO2006056125A1 (en) | 2004-11-25 | 2005-11-17 | A method for routing area updating after cutting over bsc/pcu |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100917252A CN100389633C (en) | 2004-11-25 | 2004-11-25 | Method for supporting node route domain updation in universal wireless group service |
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| Publication Number | Publication Date |
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| CN1780476A true CN1780476A (en) | 2006-05-31 |
| CN100389633C CN100389633C (en) | 2008-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100917252A Expired - Fee Related CN100389633C (en) | 2004-11-25 | 2004-11-25 | Method for supporting node route domain updation in universal wireless group service |
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| Country | Link |
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| CN (1) | CN100389633C (en) |
| WO (1) | WO2006056125A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102571581A (en) * | 2012-01-05 | 2012-07-11 | 华为技术有限公司 | Re-routing method, re-routing system, base station controller, and core network equipment in MOCN |
| US9357480B2 (en) | 2011-01-18 | 2016-05-31 | Huawei Technologies Co., Ltd. | Method for selecting a network by a terminal and dual-standby terminal |
| CN108769976A (en) * | 2018-06-01 | 2018-11-06 | 奇酷互联网络科技（深圳）有限公司 | network attachment control method, device and mobile terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4989204A (en) * | 1988-02-10 | 1991-01-29 | Nec Corporation | High throughput communication method and system for a digital mobile station when crossing a zone boundary during a session |
| FI103084B1 (en) * | 1997-01-20 | 1999-04-15 | Nokia Telecommunications Oy | Packet radio networks and the procedure for updating the routing area |
| CA2424307C (en) * | 2000-11-02 | 2010-01-12 | Nokia Corporation | Control of the location information |
-
2004
- 2004-11-25 CN CNB2004100917252A patent/CN100389633C/en not_active Expired - Fee Related
-
2005
- 2005-11-17 WO PCT/CN2005/001945 patent/WO2006056125A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9357480B2 (en) | 2011-01-18 | 2016-05-31 | Huawei Technologies Co., Ltd. | Method for selecting a network by a terminal and dual-standby terminal |
| CN102571581A (en) * | 2012-01-05 | 2012-07-11 | 华为技术有限公司 | Re-routing method, re-routing system, base station controller, and core network equipment in MOCN |
| WO2013102401A1 (en) * | 2012-01-05 | 2013-07-11 | 华为技术有限公司 | Re-routing method and system in mocn network, base station controller and core network device |
| CN102571581B (en) * | 2012-01-05 | 2015-11-25 | 华为技术有限公司 | The method of heavy-route, system and base station controller, equipment of the core network in MOCN network |
| CN108769976A (en) * | 2018-06-01 | 2018-11-06 | 奇酷互联网络科技（深圳）有限公司 | network attachment control method, device and mobile terminal |
| WO2019228103A1 (en) * | 2018-06-01 | 2019-12-05 | 奇酷互联网络科技（深圳）有限公司 | Network attachment control method and device, and mobile terminal |
| CN108769976B (en) * | 2018-06-01 | 2021-07-20 | 深圳市知赢科技有限公司 | Network attachment control method and device and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100389633C (en) | 2008-05-21 |
| WO2006056125A1 (en) | 2006-06-01 |
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