CN103188751B - Method and system of improving call completing rate of mobile communication terminal - Google Patents
Method and system of improving call completing rate of mobile communication terminal Download PDFInfo
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- CN103188751B CN103188751B CN201110456927.2A CN201110456927A CN103188751B CN 103188751 B CN103188751 B CN 103188751B CN 201110456927 A CN201110456927 A CN 201110456927A CN 103188751 B CN103188751 B CN 103188751B
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Abstract
The invention relates to a method and a system of improving the call completing rate of a mobile communication terminal and a system. The method comprises the following steps: a request of circuit exchange CS request service is initiated in the terminal, and the CS conversation service building process is conducted between networks; during the period that in the CS conversation service building process, the terminal successively transmits a data package of the conversation service building request, but a radio link control (RLC) layer of the terminal does not receive a confirmed package which is replied by the networks, and a small region of the terminal is detected to be changed; whether the small region is a cross-position region or not is judged in a higher layer protocol of the terminal; when the small region change is the cross-position region, the service request is suspended and retransmitted in a radio resource control (RRC) layer of the terminal and suspending indications are reported to a non-access network access server (NAS) layer of the terminal; position region updating is initiated in the NAS layer; and when the position region updating is finished, the CS domain service request is retransmitted in the NAS layer so as to build CS communications with the networks.
Description
Technical field
The present invention relates to mobile communication terminal, especially relate to the method and system improving mobile communication terminal call completing rate.
Background technology
Voice call is as the basic service of mobile communication, and the use sense that its call completing rate index is directly connected to user is subject to, and in mobile communication, the call completing rate of the concurrent scene of inevitable multipaths on voice call exists certain impact.
Such as in a kind of scene of TD-SCDMA system, mobile communication terminal is at packet switching (PacketSwitch, PS) connected state initiates circuit switching (Circuit Switch, CS) request is set up in speech business, upper Non-Access Stratum (Non-Access Stratum, a NAS) initial direct-sending message.Before the wireless spread-spectrum technology (Radio Link Control, RLC) not receiving peer layer confirms bag, there is TD intra-system cells and switch.After having switched, terminal higher-layer protocols can retransmit NAS initial direct-sending message after new radio bearer is set up, do not need to rebuild RLC entity if this switches, then switched rear rlc layer and retransmitted protocol Data Unit (Protocol Data Unit, the PDU) bag be not confirmed.In another kind of scene, mobile communication terminal initiates CS speech business, wireless heterogeneous networks (Radio Resource Control, RRC) connection establishment is in CELL-FACH (Forward Access Channel) state, before RRC connection setup complete message does not receive the RLC confirmation bag of peer layer, lucky generation TD intra-system cells gravity treatment, after gravity treatment completes, rrc layer can continue transmission CS territory initial direct-sending message.
If what occur under above-mentioned two kinds of scenes is cell merge or the gravity treatment in cross-location district, due to mobile management module (Mobility Management, MM) not in idle (idle) state, so location area updating can not be carried out immediately, core net receives the CS territory initial direct-sending message that terminal is sent out in reposition district, judge that terminal is not registered in this lane place, can think international mobile subscriber identity (International MobileSubscriber Identification Number, IMSI) invalid, cause this business to be set up unsuccessfully.
Problem under these two kinds of scenes exists equally when user initiates visual telephone business.
Summary of the invention
The object of this invention is to provide a kind of method improving mobile communication terminal call completing rate, can improve terminal carry out CS talk business foundation and cross-location cell change concurrent when call completing rate.
A kind of method improving mobile communication terminal call completing rate proposed by the invention, comprises the following steps: initiate circuit-switched CS domain service request in described terminal, and carry out CS talk business process of establishing between network; Terminal described in described CS talk business process of establishing successful transmission of talk business set up packet but the wireless spread-spectrum technology rlc layer of described terminal do not receive network replies confirmation bag during, described terminal generation cell change detected; Judge whether cell change is cross-location district in the higher-layer protocols of described terminal; When cell change is cross-location district, suspend transport service request and to the non-access NAS layer reporting interruption instruction of described terminal at the radio resource control RRC layer of described terminal; Described NAS layer is made to get back to idle condition; Upgrade in described NAS floor launch position district; And after location area updating completes, retransmit CS territory service request at described NAS layer, to set up CS call with network.
In one embodiment of this invention, described terminal initiates described CS territory service request from packet switching PS connected state.
In one embodiment of this invention, described terminal initiates described CS territory service request in idle condition, and by RRC connection establishment in CELL-FACH state.
In one embodiment of this invention, also comprised before described Non-Access Stratum launch position district upgrades, be indicated to network from described rrc layer CS domain signaling Connection Release.
In one embodiment of this invention, also comprised before described Non-Access Stratum launch position district upgrades, at described NAS layer, retransmission identification is set to 0.
In one embodiment of this invention, also comprise after described Non-Access Stratum launch position district upgrades, at described NAS layer, retransmission identification is set to 1.
In one embodiment of this invention, when cell change Bu Shi cross-location district, in described terminal according to 3GPP agreement regulation continuation business Establishing process, to set up CS call with network.
In one embodiment of this invention, the higher-layer protocols of described terminal is rrc layer.
In one embodiment of this invention, judge that whether cell change is that the step in cross-location district comprises: compared by the Location Area Code of the Location Area Code of Target cell and former community, if the Location Area Code of two communities is different, then judge the cell change that there occurs cross-location district.
In one embodiment of this invention, described call comprises voice and/or video calling.
In one embodiment of this invention, described mobile communication terminal meets TD-SCDMA standard.
The present invention also proposes a kind of system improving mobile communication terminal call completing rate, comprising:
For initiating circuit-switched CS domain service request in described terminal, and between network, carry out the device of CS talk business process of establishing;
Set up the packet of request for successful transmission of talk business in terminal described in described CS talk business process of establishing but during the wireless spread-spectrum technology rlc layer of described terminal do not receive the confirmation bag of network replies, the device of described terminal generation cell change detected;
For judging that in the higher-layer protocols of described terminal whether cell change is the device in cross-location district;
During for being cross-location district when cell change, suspend transport service request and the device of non-access NAS layer reporting interruption instruction to described terminal at the radio resource control RRC layer of described terminal;
The device of idle condition is got back to for making described NAS layer;
For the device upgraded in described NAS floor launch position district; And
For after location area updating completes, retransmit CS territory service request at described NAS layer, to set up the device of CS call with network.
Cell merge/the gravity treatment of cross-location district can occur while terminal carries out voice/video phone link setup for said method of the present invention and system, realize the brief termination of CS business process of establishing, preferentially carry out lane place registration.After carrying out lane place registration, CS business can be retransmitted and set up request, and business foundation can be continued.Thus the present invention can improve mobile communication terminal call completing rate.
Accompanying drawing explanation
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates CS talk business Establishing process according to an embodiment of the invention.
Fig. 2 illustrates the interaction flow of end side and network side in CS talk business process of establishing according to an embodiment of the invention.
Fig. 3 illustrates the interaction flow of end side and network side in CS talk business process of establishing according to another embodiment of the present invention.
Embodiment
Present embodiments describe and improve mobile communication terminal call completing rate, the method for the talkthrough rate especially in the concurrent scene of multipaths.In the present invention, mobile communication terminal comprises the various portable electric appts such as mobile phone, panel computer.Mobile communication terminal can meet various communication standard, such as TD-SCDMA standard.In various scene, call can comprise voice call and/or video calling.In voice call, between terminal, only there is speech data mutual.In video calling, carry out speech data between terminal simultaneously and video data mutual.
Fig. 1 illustrates CS talk business Establishing process according to an embodiment of the invention.With reference to shown in Fig. 1, when flow process starts, as shown in step 101, initiate circuit switching (Circuit Switch, CS) territory service request, to carry out CS talk business process of establishing between network at mobile communication terminal.This process can be initiated by the top layer of terminal (such as application layer), and pass downwardly through Non-Access Stratum (Non-Access Stratum, NAS), wireless heterogeneous networks (Radio Resource Control, RRC) layer performs step by step to L2 layer and physical layer.For example, the rrc layer of terminal sends business according to CS territory service request and sets up solicited message to the peer layer of network side.
As shown at step 1 02, in CS talk business process of establishing, terminal successful transmission of talk business and sets up the packet but the wireless spread-spectrum technology of terminal L2 layer (Radio Link Control of asking, RLC) layer do not receive network replies confirmation bag during, detect that terminal is Target cell from former cell change, enter step 103 thus.
In step 103, judge whether the community changing front and back is cross-location district in the higher-layer protocols of terminal.At this, the Location Area Code (Location Area Code, LAC) of community can be used as the instruction judging cross-location district, such as, when the Target cell after changing is different with the LAC of former community, namely thinks that cell change is cross-location district.
When cell change Bu Shi cross-location district, then enter step 104, according to 3GPP agreement regulation continuation business Establishing process, and set up CS call in step 105 and network.
When cell change is cross-location district, in step 106, suspend transport service request and NAS layer reporting interruption to terminal indicates at the rrc layer of terminal.
After receiving interruption instruction, get back to the free time (Idle) state as step 107NAS layer and initiate location area updating.
After location area updating completes, as step 108, retransmit CS territory service request at NAS layer, finally set up CS call in step 109 and network.
When terminal performs step 107, network may be there is not in the situation of idle condition, therefore in this case, need to be indicated to network from rrc layer CS domain signaling Connection Release, make network get back to idle condition.
In addition, upgraded before 107 in NAS floor launch position district, also at NAS layer, retransmission identification can be set to 0, and upgrade after 107 in NAS floor launch position district, at NAS layer, retransmission identification will be set to 1.
In TD-SCDMA system, carry out CS talk business foundation and the concurrent situation of cross-location cell change cause business to set up failed scene to have two kinds: one to be terminal be from packet switching PS connected state initiation CS territory service request; Two is terminals is initiate CS territory service request in idle condition, and by RRC connection establishment in CELL-FACH (Forward Access Channel, FACH) state.Therefore embodiments of the invention are mainly for these two kinds of scenes.Respectively the illustrative embodiments under these two kinds of scenes is described below.
Fig. 2 illustrates the interaction flow of end side and network side in CS talk business process of establishing according to an embodiment of the invention.With reference to shown in Fig. 2, from protocol layer angle, terminal (UE) has NAS layer, rrc layer, L2 layer and L1 layer.NAS layer has mobile management (Mobility Management, MM) module.Rlc layer is comprised in L2 layer.For the purpose of simplification, other each layers irrelevant with the present embodiment in end side are not shown.
Network side comprises core net (Core Network, CN) and UMTS Terrestrial radio access network (UMTSTerrestrial Radio Access Network, UTRAN).
In this scene, terminal is initiated circuit switching (CS) talk business at PS connected state and is set up request.In step 201, the mobile management module of end side NAS layer sends up initial direct-sending message CS territory service request (cm service request), and the module of mobile management simultaneously does not remove this message.In step 202, CS territory service request is decomposed into protocol Data Unit (Protocol Data Unit, PDU) bag and sends to network side by the rrc layer of terminal.In step 203, network side peer layer returns RLC and confirms bag.Suppose the rrc layer of terminal successfully send aforesaid PDU wrap and the RLC of network side confirm bag to be received by the L2 layer of end side (rlc layer specifically in L2 layer) before during this period of time, just meet TD intra-system cells switching condition.Therefore carry out in step 204 process that same wireless access technology (Intra-RAT) switches and complete switching.Handoff procedure is roughly, and mobile communication terminal is to network reporting subdistrict measurement report, and network issues switching command, because this part has flow process for this area, does not therefore launch to describe.In the process, the rrc layer participating in handoff procedure will detect the switching of community, thus setting up procedure 205.
After switching completes, as step 205, in the higher-layer protocols of mobile communication terminal, the Target cell Location Area Code LAC of switching and the LAC switching Qian Yuan community compare by such as rrc layer.If the LAC of Liang Ge community is identical, then set to 0 by LAC mark (LAC flag) at rrc layer, flow process proceeds to by existing mode and sets up call.If the LAC of Liang Ge community is different, then in step 206, at rrc layer, LAC mark is put 1.Therefore, do not retransmit NAS initial direct-sending message in the rrc layer of step 207 terminal and indicate (as LAC abort ind) to NAS layer reporting interruption.After receiving this instruction, because NAS layer is not in idle (idle) state, therefore first get back to idle condition in step 208.Because core net is not now also in idle condition, thus in step 209, rrc layer sends CS domain signaling Connection Release and is indicated to network side, makes core net to get back to idle condition.Then in step 210, retransmission flag (re-trans flag) is set to 0.At this, step 210 also can perform before step 209.Afterwards in step 211, NAS floor immediately launch position district upgrades.After location area updating completes, in step 212, retransmission flag is put 1 by NAS layer, the CS territory initial direct-sending message and then do not removed before step 213 is retransmitted, and continues CS telephone service Establishing process.
Fig. 3 illustrates the interaction flow of end side and network side in CS talk business process of establishing according to another embodiment of the present invention.With reference to shown in Fig. 3, end side has NAS layer, rrc layer, L2 layer and L1 layer.NAS layer has mobile management module.Network side comprises core net (Core Network, CN) and UTRAN net.For the purpose of simplification, other each layers irrelevant with the present embodiment in end side are not shown.
In this scene, terminal initiates CS talk business, and in step 301, the mobile management module of end side NAS layer submits CS territory service request to rrc layer, does not remove this message simultaneously.In step 302, after rrc layer receives CS territory service request, RRC connection request (rrcconnection req) initiated by the UTRAN net to network side, and in step 303, UTRAN returns RRC connection establishment to terminal.RRC connection establishment is in CELL-FACH state (step 305, RRC state changes to CELL-FACH).In step 304, the message that RRC connection establishment completes is transferred to network side by PDU bag.And in step 306, network side peer layer can return RLC and confirm bag.After having supposed in step 304 Successful transmissions PDU bag the RLC that returned to step 306 confirm to wrap also be not sent to end side L2 layer (specifically the rlc layer of L2 layer) between just meet TD intra-system cells reselection conditions during this period of time, then in step 307, terminal is initiated cell reselection and is completed gravity treatment.After gravity treatment completes, as the LAC of step 308 terminal higher-layer protocols by the LAC of the Target cell of gravity treatment and gravity treatment Qian Yuan community compares.If the LAC of Liang Ge community is identical, then set to 0 by LAC mark (LAC flag), flow process proceeds to by existing mode and sets up call, no longer launches at this.If the LAC of two communities is different, then in step 309, LAC mark is put 1.In step 310, rrc layer does not continue to transmit up initial direct-sending message and indicates to NAS layer reporting interruption.Respond this instruction, in step 311, make NAS layer get back to idle condition and retransmission flag be set to 0 in step 312, and in step 313, NAS floor immediately launch position district upgrades.After location area updating completes, in step 314, retransmission flag is put 1 by rrc layer notice NAS layer.In step 315, the up initial direct-sending message that NAS layer is not removed before retransmitting, continues CS telephone service Establishing process.
Embodiment described in the invention compared with prior art has following advantage: the cell merge/gravity treatment of cross-location district occurs prior art while terminal carries out voice/video phone link setup, cannot carry out location area updating, the CS business foundation causing terminal to continue on new community can be refused by network.Embodiments of the invention can realize the brief termination of CS business process of establishing, preferentially carry out lane place registration.After carrying out lane place registration, CS business can be retransmitted and set up request, and business foundation can be continued.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.
Claims (13)
1. improve a method for mobile communication terminal call completing rate, comprise the following steps:
Initiate circuit-switched CS domain service request in described terminal, and between network, carry out CS talk business process of establishing;
During terminal described in described CS talk business process of establishing successful transmission of the packet of talk business foundation request but the wireless spread-spectrum technology rlc layer of described terminal does not receive the confirmation bag of network replies, described terminal generation cell change detected;
Judge whether cell change is cross-location district in the higher-layer protocols of described terminal;
When cell change is cross-location district, suspend transport service request and to the non-access NAS layer reporting interruption instruction of described terminal at the radio resource control RRC layer of described terminal;
Described NAS layer is made to get back to idle condition;
Upgrade in described NAS floor launch position district; And
After location area updating completes, retransmit CS territory service request at described NAS layer, to set up CS call with network.
2. the method for claim 1, is characterized in that, described terminal initiates described CS territory service request from packet switching PS connected state.
3. the method for claim 1, is characterized in that, described terminal initiates described CS territory service request in idle condition, and by RRC connection establishment in CELL-FACH state.
4. method as claimed in claim 2, is characterized in that, also comprises, be indicated to network from described rrc layer CS domain signaling Connection Release before described NAS floor launch position district upgrades.
5. the method for claim 1, is characterized in that, also comprises, at described NAS layer, retransmission identification was set to 0 before described NAS floor launch position district upgrades.
6. the method for claim 1, is characterized in that, also comprises, at described NAS layer, retransmission identification is set to 1 after described NAS floor launch position district upgrades.
7. the method for claim 1, is characterized in that, when cell change Bu Shi cross-location district, in described terminal according to 3GPP agreement regulation continuation business Establishing process, to set up CS call with network.
8. the method for claim 1, is characterized in that, the higher-layer protocols of described terminal is rrc layer.
9. the method for claim 1, it is characterized in that, judge that whether cell change is that the step in cross-location district comprises: compared by the Location Area Code of the Location Area Code of Target cell and former community, if the Location Area Code of two communities is different, then judge the cell change that there occurs cross-location district.
10. the method for claim 1, is characterized in that, described call comprises voice and/or video calling.
11. the method for claim 1, is characterized in that, described cell change is cell merge or cell reselection.
12. the method for claim 1, is characterized in that, described mobile communication terminal meets TD-SCDMA standard.
13. 1 kinds of systems improving mobile communication terminal call completing rate, comprising:
For initiating circuit-switched CS domain service request in described terminal, and between network, carry out the device of CS talk business process of establishing;
Set up the packet of request for successful transmission of talk business in terminal described in described CS talk business process of establishing but during the wireless spread-spectrum technology rlc layer of described terminal do not receive the confirmation bag of network replies, the device of described terminal generation cell change detected;
For judging that in the higher-layer protocols of described terminal whether cell change is the device in cross-location district;
During for being cross-location district when cell change, suspend transport service request and the device of non-access NAS layer reporting interruption instruction to described terminal at the radio resource control RRC layer of described terminal;
The device of idle condition is got back to for making described NAS layer;
For the device upgraded in described NAS floor launch position district; And
For after location area updating completes, retransmit CS territory service request at described NAS layer, to set up the device of CS call with network.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104105116B (en) * | 2014-06-25 | 2018-02-02 | 大唐移动通信设备有限公司 | A kind of concurrent service processing method and device |
| WO2016095195A1 (en) * | 2014-12-19 | 2016-06-23 | Qualcomm Incorporated | Preserving circuit switched service during location area change |
| WO2016176816A1 (en) * | 2015-05-05 | 2016-11-10 | 华为技术有限公司 | Method, network device and system for circuit switched fallback |
| CN106412859B (en) * | 2015-07-28 | 2020-01-17 | 中国移动通信集团公司 | Method and terminal for automatically retransmitting short message |
| US12114283B2 (en) * | 2016-08-21 | 2024-10-08 | Qualcomm Incorporated | Methods and systems for support of location for the internet of things |
| US11405863B2 (en) | 2016-10-05 | 2022-08-02 | Qualcomm Incorporated | Systems and methods to enable combined periodic and triggered location of a mobile device |
| CN109982394B (en) * | 2017-12-27 | 2021-03-16 | 中国移动通信集团北京有限公司 | Signaling interaction method and device |
| US12108305B2 (en) | 2020-09-29 | 2024-10-01 | Qualcomm Incorporated | System and methods for power efficient positioning of a mobile device |
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