CN103188751A - 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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- CN103188751A CN103188751A CN2011104569272A CN201110456927A CN103188751A CN 103188751 A CN103188751 A CN 103188751A CN 2011104569272 A CN2011104569272 A CN 2011104569272A CN 201110456927 A CN201110456927 A CN 201110456927A CN 103188751 A CN103188751 A CN 103188751A
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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 that improves the mobile communication terminal call completing rate.
Background technology
Voice call is as the basic service of mobile communication, and its call completing rate index is directly connected to user's use impression, and in the mobile communication inevitably the concurrent scene of multipaths there is certain influence in the call completing rate of voice call.
For example in a kind of scene of TD-SCDMA system, mobile communication terminal is in packet switching (Packet Switch, PS) connected state initiation circuit switching (Circuit Switch, CS) speech business foundation request, go up and send out Non-Access Stratum (Non-Access Stratum, NAS) initial direct-sending message.Do not receiving that (Radio Link Control RLC) confirms before the bag, and residential quarter switching in the TD system takes place in the Radio Link control of peer layer.After switching is finished, the terminal higher-layer protocols can be retransmitted the NAS initial direct-sending message after new radio bearer is set up, do not need to rebuild the RLC entity if this switches, then switch the protocol Data Unit that the rlc layer re-transmission does not obtain confirming after finishing (Protocol Data Unit, PDU) bag.In another kind of scene, mobile communication terminal is initiated the CS speech business, Radio Resource control (Radio Resource Control, RRC) connect CELL-FACH (the Forward Access Channel) state that is based upon, the RRC connection setup complete message does not receive that the RLC of peer layer confirms before the bag, residential quarter gravity treatment in the TD system takes place just, and after gravity treatment was finished, rrc layer can continue to transmit CS territory initial direct-sending message.
If what take place under above-mentioned two kinds of scenes is residential quarter switching or the gravity treatment in cross-location district, because mobile management module (Mobility Management, MM) not at idle (idle) state, so can not carry out location area updating immediately, core net is received the CS territory initial direct-sending message that terminal is sent out in the reposition district, judge that terminal is not in this lane place registration, can think international mobile subscriber identity (International Mobile Subscriber Identification Number, IMSI) invalid, cause this professional foundation to be failed.
Problem under these two kinds of scenes exists when the user initiates visual telephone business equally.
Summary of the invention
The purpose of this invention is to provide a kind of method that improves the mobile communication terminal call completing rate, can improve terminal and carry out call completing rate under the concurrent situation of CS talk business foundation and cross-location cell change.
A kind of method that improves the mobile communication terminal call completing rate proposed by the invention may further comprise the steps: initiate circuit switching (CS) territory service request in described terminal, and carry out the CS talk business between the network and set up process; Described CS talk business set up that terminal described in the process has successfully sent packet that talk business sets up but the Radio Link control rlc layer of described terminal do not receive that network replys the affirmation bag during, detect described terminal generation cell change; Judge in the higher-layer protocols of described terminal whether cell change is the cross-location district; When cell change is the cross-location district, suspends the transport service request and report to the non-access NAS layer of described terminal at the radio resource control RRC layer of described terminal and interrupt indication; Make described NAS layer get back to idle condition; Initiate location area updating at described NAS layer; And after location area updating is finished, retransmit CS territory service request at described NAS layer, to set up the CS conversation with network.
In one embodiment of this invention, described terminal is to initiate described CS territory service request from packet switching PS connected state.
In one embodiment of this invention, described terminal is to initiate described CS territory service request in idle condition, and RRC is connected the CELL-FACH state that is based upon.
In one embodiment of this invention, initiate also to comprise before the location area updating at described Non-Access Stratum, connect to discharge to indicate from described rrc layer CS domain signaling and give network.
In one embodiment of this invention, initiate also to comprise before the location area updating at described Non-Access Stratum, will retransmit sign at described NAS layer and be set to 0.
In one embodiment of this invention, after described Non-Access Stratum is initiated location area updating, also comprise, will retransmit sign at described NAS layer and be set to 1.
In one embodiment of this invention, when cell change is not the cross-location district, set up flow process in described terminal according to 3GPP agreement regulation continuation business, to set up the CS conversation 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: the Location Area Code of Target cell and the Location Area Code of former residential quarter are compared, if the Location Area Code difference of two residential quarters is then judged the cell change in cross-location district has been taken place.
In one embodiment of this invention, described conversation comprises voice and/or video calling.
In one embodiment of this invention, described mobile communication terminal is to meet the TD-SCDMA standard.
The present invention also proposes a kind of system that improves the mobile communication terminal call completing rate, comprising:
Be used for initiating circuit switching (CS) territory service request in described terminal, and carry out the device that process is set up in the CS talk business between the network;
Be used for setting up in described CS talk business that terminal described in the process has sent successfully that requested packets is set up in talk business but during the Radio Link control rlc layer of described terminal do not receive the affirmation bag that network replys, detect the device of described terminal generation cell change;
Be used for judging in the higher-layer protocols of described terminal whether cell change is the device in cross-location district;
Be used for when cell change is the cross-location district, suspend the transport service request and report to the non-access NAS layer of described terminal at the radio resource control RRC layer of described terminal and interrupt the device of indicating;
Be used for making described NAS layer get back to the device of idle condition;
Be used for initiating at described NAS layer the device of location area updating; And
Be used for after location area updating is finished, retransmit CS territory service request at described NAS layer, to set up the device of CS conversation with network.
Said method of the present invention and system can take place when terminal is carried out voice/video phone link setup under the situation of cross-location district residential quarter switching/gravity treatment, realize the temporary transient termination that the CS business is set up process, preferentially carry out the lane place registration.After carrying out the lane place registration, can retransmit professional foundation of CS and ask, and can continue professional foundation.Thereby the present invention can improve the mobile communication terminal call completing rate.
Description of drawings
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 according to an embodiment of the invention and sets up flow process.
Fig. 2 illustrates the interaction flow that end side and network side in the process are set up in CS talk business according to an embodiment of the invention.
Fig. 3 illustrates the interaction flow that end side and network side in the process are set up in CS talk business according to another embodiment of the present invention.
Embodiment
Embodiments of the invention have been described raising mobile communication terminal call completing rate, especially the method for the talkthrough rate in the concurrent scene of multipaths.In the present invention, mobile communication terminal comprises various portable electric appts such as mobile phone, panel computer.Mobile communication terminal can meet various communication standards, for example the TD-SCDMA standard.In various scenes, conversation can comprise voice call and/or video calling.In voice call, only there is speech data mutual between the terminal.In video calling, it is mutual to carry out speech data and video data between the terminal simultaneously.
Fig. 1 illustrates CS talk business according to an embodiment of the invention and sets up flow process.With reference to shown in Figure 1, when flow process begins, shown in step 101, mobile communication terminal initiate circuit switching (Circuit Switch, CS) territory service request, with and network between carry out the CS talk business and set up process.This process can be initiated by the top layer (for example application layer) of terminal, and downwards by Non-Access Stratum (Non-Access Stratum, NAS), (Radio Resource Control, RRC) course L2 layer and physical layer are carried out step by step in Radio Resource control.For instance, 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.
Shown in step 102, set up in the process in the CS talk business, terminal has sent successfully that requested packets is set up in talk business but Radio Link control (the Radio Link Control of terminal L2 layer, RLC) layer do not receive that network replys the affirmation bag during, detecting terminal is Target cell from former cell change, enters step 103 thus.
In step 103, judge in the higher-layer protocols of terminal whether the residential quarter before and after changing is the cross-location district.At this, (Location Area Code LAC) can be used as the indication of judging the cross-location district to the Location Area Code of residential quarter, and for example the LAC of the Target cell after changing and former residential quarter thinks that namely cell change is the cross-location district not simultaneously.
When cell change is not the cross-location district, then enter step 104, set up flow process according to 3GPP agreement regulation continuation business, and set up the CS conversation in step 105 and network.
When cell change is the cross-location district, in step 106, suspends the transport service request and report to the NAS layer of terminal at the rrc layer of terminal and interrupt indication.
After receiving the interruption indication, get back to the free time (Idle) state and initiate location area updating as step 107NAS layer.
After location area updating is finished, as step 108, retransmit CS territory service request at the NAS layer, finally set up the CS conversation in step 109 and network.
When terminal execution in step 107, may exist network not in the situation of idle condition, therefore in this case, need connect to discharge to indicate from rrc layer CS domain signaling and give network, make network get back to idle condition.
In addition, before the NAS layer is initiated location area updating 107, also can will retransmit sign at the NAS layer and be set to 0, and after the NAS layer is initiated location area updating 107, will will retransmit sign at the NAS layer and be set to 1.
In the TD-SCDMA system, carry out CS talk business foundation and the concurrent situation of cross-location cell change and cause the professional scene of setting up failure to have two kinds: the one, terminal is to initiate CS territory service request from packet switching PS connected state; The 2nd, terminal is to initiate CS territory service request in idle condition, and RRC is connected CELL-FACH (Forward Access Channel, the FACH) state of being based upon.Therefore embodiments of the invention are primarily aimed at this two kinds of scenes.Respectively the illustrative embodiments under these two kinds of scenes is described below.
Fig. 2 illustrates the interaction flow that end side and network side in the process are set up in CS talk business according to an embodiment of the invention.With reference to shown in Figure 2, from the protocol layer angle, terminal (UE) has NAS layer, rrc layer, L2 layer and L1 layer.The NAS layer has mobile management (Mobility Management, MM) module.Comprise rlc layer in the L2 layer.For simplicity, other each layers that have nothing to do with present embodiment in the end side are not shown.
Network side comprise core net (Core Network, CN) and UMTS Terrestrial radio access network (UMTS Terrestrial Radio Access Network, UTRAN).
In this scene, terminal is initiated the circuit switching (CS) talk business at the 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 is not simultaneously removed this message.In step 202, the rrc layer of terminal is decomposed into protocol Data Unit with CS territory service request, and (Protocol Data Unit, PDU) bag sends to network side.In step 203, the network side peer layer returns RLC and confirms bag.Suppose that rrc layer in terminal successfully sends aforesaid PDU bag and the RLC of network side confirm bag received by the L2 layer of end side (specifically being the rlc layer in the L2 layer) before during this period of time, satisfy residential quarter switching condition in the TD system just.Therefore carry out the process of same wireless access technology (Intra-RAT) switching and finish switching in step 204.Handoff procedure is roughly, and mobile communication terminal is to network reporting subdistrict measurement report, and network issues switching command, because this part is the existing flow process in this area, does not therefore launch to describe.In this process, the rrc layer that participates in handoff procedure will detect the switching of residential quarter, thus setting up procedure 205.
After switching was finished, as step 205, in the higher-layer protocols of mobile communication terminal, for example rrc layer compared the Target cell Location Area Code LAC that switches and the LAC that switches preceding former residential quarter.If the LAC of two residential quarters is identical, then at rrc layer LAC sign (LAC flag) is put 0, flow process proceeds to by existing mode and sets up conversation.If the LAC difference of two residential quarters then in step 206, puts 1 at rrc layer with the LAC sign.Therefore, do not retransmit the NAS initial direct-sending message and report interruption indication (as LAC abort ind) to the NAS layer at the rrc layer of step 207 terminal.After receiving this indication, because therefore the NAS layer gets back to idle condition earlier in step 208 not at idle (idle) state.Because core net is not at this moment also in idle condition, thereby in step 209, rrc layer sends the CS domain signaling and connects the release indication to network side, makes core net can get back to idle condition.Then in step 210 retransmission flag (re-trans flag) is set to 0.At this, step 210 also can be carried out before step 209.In step 211, the NAS layer is initiated location area updating immediately afterwards.After location area updating was finished, in step 212, the NAS layer put 1 with retransmission flag, and and then the CS territory initial direct-sending message of not removing before step 213 is retransmitted continues the CS telephone service and sets up flow process.
Fig. 3 illustrates the interaction flow that end side and network side in the process are set up in CS talk business according to another embodiment of the present invention.With reference to shown in Figure 3, end side has NAS layer, rrc layer, L2 layer and L1 layer.The NAS layer has the mobile management module.Network side comprises core net, and (Core Network is CN) with the UTRAN net.For simplicity, other each layers that have nothing to do with present embodiment in the end side are not shown.
In this scene, terminal is initiated the CS talk business, and in step 301, the mobile management module of end side NAS layer is submitted CS territory service request to rrc layer, does not remove this message simultaneously.In step 302, after rrc layer is received CS territory service request, initiate RRC connection request (rrc connection req) to the UTRAN net of network side, and in step 303, UTRAN returns RRC to terminal and connects foundation.RRC connects the CELL-FACH state (step 305, the RRC state changes to CELL-FACH) that is based upon.In step 304, the RRC connection is set up the message of finishing and is transferred to network side by the PDU bag.And in step 306, the network side peer layer can return RLC and confirm bag.Suppose that the RLC affirmation of having returned to step 306 is wrapped and satisfy residential quarter reselection conditions in the TD system during this period of time just between the L2 layer (specifically being the rlc layer of L2 layer) that does not also send to end side after step 304 has successfully been transmitted the PDU bag, then in step 307, terminal is initiated the residential quarter gravity treatment and is finished gravity treatment.After gravity treatment is finished, as step 308 terminal higher-layer protocols with the LAC of the Target cell of gravity treatment and gravity treatment before the LAC of former residential quarter compare.If the LAC of two residential quarters is identical, then LAC sign (LAC flag) is put 0, flow process proceeds to by existing mode and sets up conversation, no longer launches at this.If the LAC difference of two residential quarters then puts 1 in step 309 with the LAC sign.In step 310, rrc layer does not continue to transmit up initial direct-sending message and reports the interruption indication for the NAS layer.Respond this indication, in step 311, make the NAS layer get back to idle condition and in step 312 retransmission flag is put 0, and in step 313, the NAS layer is initiated location area updating immediately.After location area updating was finished, in step 314, rrc layer notice NAS layer put 1 with retransmission flag.In step 315, the up initial direct-sending message of not removing before the NAS layer is retransmitted continues the CS telephone service and sets up flow process.
Embodiment described in the invention compared with prior art has following advantage: prior art takes place under the situation of cross-location district residential quarter switching/gravity treatment when terminal is carried out voice/video phone link setup, can't carry out location area updating, the professional foundation meeting of CS that causes terminal to continue in new residential quarter is refused by network.Embodiments of the invention can realize that the CS business sets up the temporary transient termination of process, preferentially carry out the lane place registration.After carrying out the lane place registration, can retransmit professional foundation of CS and ask, and can continue professional foundation.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (13)
1. method that improves the mobile communication terminal call completing rate may further comprise the steps:
Initiate circuit switching (CS) territory service request in described terminal, and carry out the CS talk business between the network and set up process;
Set up in described CS talk business that terminal described in the process has sent successfully that requested packets is set up in talk business but during the Radio Link control rlc layer of described terminal do not receive the affirmation bag that network replys, detect described terminal generation cell change;
Judge in the higher-layer protocols of described terminal whether cell change is the cross-location district;
When cell change is the cross-location district, suspends the transport service request and report to the non-access NAS layer of described terminal at the radio resource control RRC layer of described terminal and interrupt indication;
Make described NAS layer get back to idle condition;
Initiate location area updating at described NAS layer; And
After location area updating is finished, retransmit CS territory service request at described NAS layer, to set up the CS conversation with network.
2. the method for claim 1 is characterized in that, described terminal is to initiate described CS territory service request from packet switching PS connected state.
3. the method for claim 1 is characterized in that, described terminal is to initiate described CS territory service request in idle condition, and RRC is connected the CELL-FACH state that is based upon.
4. method as claimed in claim 2 is characterized in that, initiates also to comprise before the location area updating at described Non-Access Stratum, connects from described rrc layer CS domain signaling to discharge indication to network.
5. the method for claim 1 is characterized in that, initiates also to comprise before the location area updating at described Non-Access Stratum, will retransmit sign at described NAS layer and be set to 0.
6. the method for claim 1 is characterized in that, also comprises after described Non-Access Stratum is initiated location area updating, will retransmit sign at described NAS layer and be set to 1.
7. the method for claim 1 is characterized in that, when cell change is not the cross-location district, sets up flow process in described terminal according to 3GPP agreement regulation continuation business, to set up the CS conversation 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: the Location Area Code of Target cell and the Location Area Code of former residential quarter are compared, if the Location Area Code difference of two residential quarters is then judged the cell change in cross-location district has been taken place.
10. the method for claim 1 is characterized in that, described conversation comprises voice and/or video calling.
11. the method for claim 1 is characterized in that, described cell change is that switch or the residential quarter gravity treatment residential quarter.
12. the method for claim 1 is characterized in that, described mobile communication terminal is to meet the TD-SCDMA standard.
13. a system that improves the mobile communication terminal call completing rate comprises:
Be used for initiating circuit switching (CS) territory service request in described terminal, and carry out the device that process is set up in the CS talk business between the network;
Be used for setting up in described CS talk business that terminal described in the process has sent successfully that requested packets is set up in talk business but during the Radio Link control rlc layer of described terminal do not receive the affirmation bag that network replys, detect the device of described terminal generation cell change;
Be used for judging in the higher-layer protocols of described terminal whether cell change is the device in cross-location district;
Be used for when cell change is the cross-location district, suspend the transport service request and report to the non-access NAS layer of described terminal at the radio resource control RRC layer of described terminal and interrupt the device of indicating;
Be used for making described NAS layer get back to the device of idle condition;
Be used for initiating at described NAS layer the device of location area updating; And
Be used for after location area updating is finished, retransmit CS territory service request at described NAS layer, to set up the device of CS conversation with network.
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