CN102045704A - Method and system for establishing local exchange for local call in call establishing process - Google Patents
Method and system for establishing local exchange for local call in call establishing process Download PDFInfo
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- CN102045704A CN102045704A CN2009101107804A CN200910110780A CN102045704A CN 102045704 A CN102045704 A CN 102045704A CN 2009101107804 A CN2009101107804 A CN 2009101107804A CN 200910110780 A CN200910110780 A CN 200910110780A CN 102045704 A CN102045704 A CN 102045704A
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Abstract
The invention discloses a method and a system for establishing local exchange for local call in a call establishing process. The method comprises that: if a mobile switching center server (MSC server) supports local exchange, a specific identifier is distributed to at least one party of call participation parties, and a base station controller (BSC) of the call participation parties acquires the specific identifier by designating request message; and the BSC learns that the call of the call participation parties is local call according to the specific identifier in the designated request message, and the local exchange function is used in the subsequent call. After the method and the system are adopted, waste of Abis port and A port transmission resources is avoided, the local exchange function of the local call is realized, and the local call can finish exchange of user interface voice in a base transceiver station (BTS), a BTS cluster or the BSC.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of method of in call establishment, local call being set up local exchange.
Background technology
At existing global system for mobile communications (Global System for Mobile Communications, abbreviate GSM as) in, Mobile Switching Center Server (Mobile Switching Center Server, abbreviate MSC Server as) and base station controller (Base Station Controller, abbreviate BSC as) between adopt the A interface to communicate, and portable terminal (Mobile Station, abbreviate MS as) communicate by the air interface Um Interface with base transceiver station (Base Transceiver Station abbreviates BTS as).In addition, be connected by Abis interface between BTS and the BSC.
The calling procedure that MS initiates in the gsm system as shown in Figure 1, may further comprise the steps:
(1) MS sends Channel Required (channel request abbreviates Channel REQ as) message to BTS on the access channel of interface aloft;
(2) BTS sends Channel Required (channel request abbreviates ChannelRQD as) message to BSC;
(3) after BSC received Channel Required message, the assignment signalling channel sent Channel Activation (channel activates, and abbreviates Channel ACT as) message to BTS;
(4) after BTS receives Channel Activation message, if channel type is correct, then on allocated channel, drive power amplifier, the up reception information that begins, and to BSC transmission ChannelActivation Acknowledge (the channel activation confirmation abbreviates Channel ACT ACK as) message;
(5) BSC sends Immediate Assignment Command (the immediate assignment order abbreviates IMM ASS CMD as) by BTS to MS;
(6) MS sends out the access of SABM (Set Asynchronous Balanced Mode is provided with Asynchronous Balanced Mode) frame;
(7) BTS returns UA (Unnumbered Acknowledgement, unnumbered acknowledge) frame and confirms;
(8) BTS sends out Establishment Indication (set up indication, abbreviate ESTIND as) to BSC, includes CM Service Request (url management service request) message content;
(9) BSC sets up A interface SCCP link, sends CM Service Request (url management service request) to MSC;
(10) MSC returns link affirmation (abbreviating CC as) message to BSC;
(11) MSC sends out CM Service Accepted (url management is professional to be received) message;
(12) caller MS sends out Setup (set up and call out) message;
(13) MSC sends out Call Proceeding (calling is carried out) message to caller MS;
(14) MSC sends out Assignment Request (assignment request to BSC, abbreviate ASS REQ as) message, in this message, distributed A interface CIC (Circuit Identity Codec, cic circuit identification code) or call identifier (Call Identifier abbreviates Call ID as);
(15) BSC distributes voice channel, sends Channel Activation to BTS;
(16) after BTS receives Channel Activation,, then on allocated channel, drive power amplifier if channel type is correct, the up reception information that begins, and to BSC transmission Channel ActivationAcknowledge;
(17) BSC sends Assignment Command (assign order, abbreviate ASS CMD as) by BTS to MS;
(18) MS sends out the SABM frame and inserts on the channel appointed in Assignment Command;
(19) BTS returns the UA frame and confirms;
(20) BTS sends out Establishment Indication to BSC;
(21) MS sends Assignment Complete (appointment is finished, and abbreviates ASS CMP as) message behind the incoming voice channel;
(22) radio traffic channel is with after land circuit all successfully is connected, and BSC sends Assignment Complete message to MSC, and thinks that this calling enters talking state;
(23) MSC sends out Alerting (ring) to caller MS, caller MS ring;
(24) MSC sends out Connect (connection) to caller MS;
(25) caller MS returns Connect Acknowledge (connect and confirm, abbreviate Connect ACK as) to MSC;
(26) caller MS and called MS enter the voice call state.
The called flow process of MS in the gsm system as shown in Figure 2, may further comprise the steps:
(1) when in the service area of paged MS at MSC, MSC sends Paging (paging) message to BSC, comprise paging cell list and TMSI (Temperate MobileSubscriber Indentity in this message, temporary mobile subscriber identity) and IMSI (International MobileSubscriber Identity, international mobile subscriber identity) information;
(2) BSC sends Paging Command (paging command abbreviates PagingCMD as) message to the paging sub-district, the number of paging subchannel and shared timeslot number under comprising in this message;
(3) after BTS receives the Paging Command message of BSC, on the paging subchannel under this paging group, send Paging Request (the paging request abbreviates Paging REQ as) message, comprise paged user's IMSI or TMSI in this message;
(4) behind the MS decoding paging messages,, then will send ChannelRequest message and trigger the Initial Channel Assignment assigning process if discovery is the paging to oneself;
The same calling procedure of stating of follow-up flow process is no longer given unnecessary details at this.
From above-mentioned flow process as can be seen, calling and called user in the gsm system is when setting up calling, and in the process that the A mouth is assigned, no matter this calling is based on TDM (Time Division Multiplex, time division multiplexing) carrying also is based on the IP carrying, all can be call identification of this call distribution.
In the calling and called flow process of gsm system, all the user-plane voice of calling out a side can be passed to media gateway (Media Gateway abbreviates MGW as) by BSC at present, pass to the BSC of opposite end again by MGW, even both call sides is under the same BSC.But, in the GSM of reality network, exist the situation of a large amount of Local Call (local call), promptly both call sides belongs under the same BTS or belongs to the different B TS under same BTS bunch or belong under the same BSC.For these local calls, if continue to use present call flows, then following problem can appear:
(1) for the calling that belongs under the same BTS, the user-plane voice that a side will occur calling out is given BSC by the Abis oral instructions of BTS, BSC sends this user-plane voice to MGW again, MGW sends back former BSC to user-plane voice again, former BSC sends this user-plane voice to the situation of former BTS again, causes the waste of the defeated resource of Abis mouth and A oral instructions;
(2) for the calling between the different B TS that belongs under same BTS bunch, the user-plane voice that a side will occur calling out is given this BTS bunch control BTS by the Abis oral instructions of BTS, this control BTS sends this user-plane voice to BSC by its Abis mouth again, BSC sends this user-plane voice to MGW again, MGW sends back user-plane voice former BSC again, former BSC sends this user-plane voice to above-mentioned control BTS again, above-mentioned control BTS sends this user-plane voice to the situation of former BTS again, cause the waste of the defeated resource of Abis oral instructions between above-mentioned control BTS and BSC, also wasted the defeated resource of A oral instructions simultaneously;
(3) as shown in Figure 3, for the calling that belongs under the same BSC, BSC will occur and send user-plane voice to MGW earlier, MGW sends user-plane voice to the situation of this BSC again, causes the waste of the defeated resource of A oral instructions.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of local call being set up local exchange in call establishment, and local call is realized local function of exchange.
For addressing the above problem, the invention provides a kind of method of in call establishment, local call being set up local exchange, comprise: if Mobile Switching Center Server (MSC Server) is supported local exchange, then at least one side in the conversation participant distributes unique identifier, the base station controller (BSC) under the conversation participant is known unique identifier by assignment request message;
If BSC learns that the conversation under the conversation participant is a local call according to unique identifier in the assignment request message, then follow-up local function of exchange is used in conversation.
In addition, if MSC Server supports local exchange, then distribute unique identifier to be meant: if MSC Server supports local exchange at least one side in the conversation participant, then be the conversation participant assigns talk information identifier under the MSC Server, the call-information identifier be the identifier of opposite end conversation participant;
If BSC is according to unique identifier in the assignment request message, learn that the conversation under the conversation participant is that local call is meant: BSC is according to the call-information identifier, in the BSC scope, seek opposite end conversation participant,, learn that then the conversation under the conversation participant is a local call if search out.
In addition, the call-information identifier is informed MSCServer by the MSC Server under the opposite end conversation participant.
In addition, the call-information identifier is the cic circuit identification code CIC or the call identifier of opposite end conversation participant;
BSC knows that according to the call-information identifier conversation under the conversation participant is that local call is meant: BSC is after receiving assignment request message, if in this BSC scope, search out the cic circuit identification code CIC that carries opposite end conversation participant or the terminal of call identifier, know that then the conversation under the conversation participant is a local call.
In addition, if MSC Server supports local exchange, then distribute unique identifier to be meant:, then to be that the conversation participant of same conversation distributes identical calling sign indicating number, for different conversations distributes different calling sign indicating numbers if MSC Server supports local exchange at least one side in the conversation participant; MSC Server distributes identical calling sign indicating number for the conversation participant;
If BSC is according to unique identifier in the assignment request message, learn that the conversation under the conversation participant is that local call is meant: after BSC receives assignment request message, there is the calling that has the same call sign indicating number with the current talking participant on it if judge, knows that then these two the affiliated conversations of calling that have the same call sign indicating number are local call.
In addition, support the local MSC Server that exchanges to call out sign indicating number and distribute to opposite end conversation participant by the MSCServer under the opposite end conversation participant; MSC Server under the opposite end conversation participant informs the calling sign indicating number that opposite end BSC distributes by assignment request.
In addition, BSC also comprised the step that judges whether to use local function of exchange before setting up the connection of internal user face, be specially:
Whether the voice coding modes of judging the calling and called both sides is compatible, if compatible or incompatible but there is codec BSC inside, then can use local function of exchange;
Otherwise do not have local function of exchange.
In addition, BSC uses local function of exchange to be meant follow-up to conversation: BSC is knowing that setting up the internal user face after the conversation of conversation under the participant is as local call connects, and finishes message and inform that its internal user face connection of the latter sets up by replying to MSC Server to assign.
In addition, BSC uses local function of exchange to be meant follow-up to conversation: BSC replys appointment to MSC Server and finishes message after knowing that the conversation of conversation under the participant is as local call, and whether it can use local function of exchange to inform the latter;
MSC Server if judging local call can use local function of exchange, then sends local exchange command to BSC when follow-up the needs after receiving that message is finished in appointment;
After BSC receives this order, set up the internal user face and connect, bring into use the local function of exchange of local call then.
The present invention also provides a kind of system that local call is set up local exchange in call establishment, comprising: Mobile Switching Center Server (MSC Server) and base station controller (BSC),
If MSC Server supports local exchange, then distribute unique identifier at least one side in the conversation participant;
BSC under the conversation participant is known unique identifier by assignment request message, and judges whether the conversation under the conversation participant is local call, if then follow-up local function of exchange is used in conversation
After adopting the present invention, avoided the waste of the defeated resource of Abis mouth and A oral instructions, realized this locality exchange (Local Switch is called for short LS) function of local call, make local call can be in BTS, in the BTS bunch or just can finish the exchange of user-plane voice in the BSC.
Description of drawings
Fig. 1 is a calling procedure of the prior art;
Fig. 2 is a called flow of the prior art;
Fig. 3 is the schematic diagram that user-plane voice is transmitted between MS, BSC and MGW in the prior art;
Fig. 4 be in the embodiment of the invention in call establishment, the A interface signaling process figure that assignment request message is optimized;
Fig. 5 is for having realized the schematic diagram that user-plane voice is transmitted between local exchange later MS, BSC and MGW to local call in the embodiment of the invention;
Fig. 6 be in the embodiment of the invention in call establishment, MSC Server is used for BSC and knows whether the conversation under the current calling is the flow chart of local call by the call-information identifier;
Flow chart when Fig. 7 is the call identifier called out of opposite end or cic circuit identification code for call-information identifier in the flow process shown in Figure 6 in the embodiment of the invention;
Fig. 8 be in the embodiment of the invention in call establishment, MSC Server is used for BSC and knows whether the conversation under the current calling is the flow chart of local call by the mode for the identical calling sign indicating number of current calling and opposite end call distribution;
Fig. 9 connects the signaling process figure that whether has set up for BSC notice MSC Server internal user face in the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
The method of local call being set up local exchange in call establishment provided by the invention as shown in Figure 4, comprising:
(1) MSC Server is except finishing existing protocol standard function, before sending assignment request message, if MSC Server supports local exchange, then at least one side in the conversation participant distributes unique identifier, the BSC under the conversation participant is known unique identifier by assignment request message.
(2) BSC is if know that according to assignment request message it is local call that affiliated conversation (conversation under the participant of promptly conversing) is called out in current calling and opposite end, then exchange by this locality of setting up internal user face ways of connecting realization both call sides user-plane voice between the calling of current calling and opposite end follow-up, user-plane voice between this both call sides can no longer be transmitted through core net, send to the other side but directly connect, as shown in Figure 5 by this internal user face.This internal user face connects the position set up according to the difference of both call sides position and difference: if current calling and opposite end calling belong to same BTS inside, then this internal user face connection is based upon this BTS inside, and user-plane voice is transmitted to calling both sides by this BTS; Belong to same BTS bunch inside if call out current calling and opposite end, then this internal user face connection is based upon this BTS bunch inside, and user-plane voice is transmitted to calling both sides by this BTS bunch inside; Belong to same BSC inside if call out current calling and opposite end, then this internal user face connection is based upon this BSC inside, and user-plane voice is transmitted to calling both sides by this BSC.
In above-mentioned steps (1), MSC Server inform conversation under the participant BSC and BSC know call out under conversation whether be that local call can be in the following ways:
Mode one: as shown in Figure 6, if MSC Server supports local exchange, then carry a call-information identifier in the assignment request message of the BSC under sending to the conversation participant, after BSC receives assignment request message, if wherein carry the call-information identifier, then seek the opposite end and call out, call out, then know current calling and the conversation under calling out of the opposite end that searches out is a local call if can in BSC, search out the opposite end according to the call-information identifier.Call-information identifier herein is a kind of of unique identifier.
A kind of embodiment of this mode is as follows:
After this mode was applicable to that caller MSC Server sends assignment request message for earlier caller BSC, called MS C Server sent assignment request message for called BSC again.Called MS C Server is if support local exchange, then in sending to the assignment request of called BSC, carry the call-information identifier of caller, after called BSC receives assignment request message, if wherein carry the call-information identifier, whether the terminal of then judging this call-information identifier correspondence is in this BSC, if find, then know this time to call out to constitute local call.
Need to prove, caller MSC Server need send to the call-information identifier of caller called MSC Server, this send mode can be directly the call-information identifier of caller to be sent to called MSC Server by caller MSC Server, also can be to send to called MS C Server by other node by the mode of transmitting.
The another kind of embodiment of this mode is as follows:
After this mode was applicable to that called MS C Server sends assignment request message for earlier called BSC, caller MSC Server sent assignment request message for caller BSC again.Caller MSC Server is if support local exchange, then in the assignment request that sends to caller BSC, carry called call-information identifier, after caller BSC receives assignment request message, if wherein carry the call-information identifier, whether the terminal of then judging this call-information identifier correspondence is in this BSC, if find, then know this time to call out to constitute local call.
Need to prove, called MS C Server need send to called call-information identifier the MSC Server of caller, this send mode can be the MSC Server that directly called call-information identifier is sent to caller by called MS C Server, also can be to send to caller MSC Server by other node by the mode of transmitting.
This call-information identifier can be cic circuit identification code CIC or the call identifier (Call Identifier) that call out the opposite end, CIC herein is existing circuit identifier (being used to indicate the A mouth calling that is carried on the TDMTransport), and Call Identifier herein also is existing C all ID (being used to indicate the A mouth calling that is carried on the IP Transport).Preferably, as shown in table 1, this call-information identifier is made up of Local Call reference ID for TDM and Local Call reference ID for IP, when call out when the A mouth transmits based on TDM the opposite end, use Local Call reference ID forTDM as the call-information identifier, its value takies 2 octets; And when opposite end calling A mouth transmits based on IP, use Local Call reference ID for IP as the call-information identifier, its value takies 4 octets.Wherein the method for expressing of Circuit Identity Codec and Call Identifier is a prior art.
Table 1 call-information identifier structural table
As shown in Figure 7, in such cases, MSC Server has the cic circuit identification code or the call identifier of caller when sending assignment request message for called BSC, called BSC is after receiving assignment request message, if cic circuit identification code CIC or call identifier that cic circuit identification code that discovery is wherein carried or call identifier are some callings think that then the conversation under current calling and this calling is a local call.
Mode two: as shown in Figure 8,, then be the identical calling sign indicating number of both sides' call distribution of same conversation, for different conversations distributes different calling sign indicating numbers if MSC Server supports local exchange.Then, this MSC Server carries the corresponding call sign indicating number in the assignment request message that the BSC under current calling and opposite end calling sends respectively; After BSC receives assignment request message, search whether there is the calling that has the same call sign indicating number with current calling at all-calls on it,, think that then the conversation under two callings that have the same call sign indicating number is a local call if having, otherwise, think that the conversation under the current calling is not a local call.Calling herein is a kind of of unique identifier.
If a certain MSC Server in the call setup supports local call, then this MSC Server is that same both call sides distributes identical calling sign indicating number, and informs corresponding BSC by assignment request.The identical calling sign indicating number that this MSCServer will distribute is informed the MSC of opposite end, and the MSC of opposite end informs corresponding BSC by assignment request.After BSC receives assignment request message, search whether there is the calling that has the same call sign indicating number with current calling at all-calls on it,, think that then the conversation under two callings that have the same call sign indicating number is a local call if having, otherwise, think that the conversation under the current calling is not a local call.
Need to prove, this MSC Server need send to the calling sign indicating number that distributes the MSCServer of opposite end, this send mode can be directly will call out the MSCServer that sign indicating number sends to the opposite end by MSC Server, also can be to send to opposite end MSC Server by other node by the mode of transmitting.
This call-information identifier can be the unique serial number that MSC Server distributes for this conversation, its form can be as shown in table 2, wherein, the call-information identifier takies 8 bits, and the bit 1,2,3 of low level and the value of bit 4 are used for representing the call-information identifier of this conversation.MSC Server is the call-information identifier difference of different local call distribution by the form of this kind serial number.
Table 2 call-information identifier-format
This calling sign indicating number can but be not limited to adopt above-mentioned table 2 form.
In the above-mentioned steps (2), BSC can also may further comprise the steps before setting up the connection of internal user face:
The voice coding modes that call out the voice coding modes of more current calling and opposite end, and according to comparative result whether decision can set up the internal user face and connect (promptly whether can use local function of exchange).6 kinds of situations can appear in this moment, and are as shown in table 4.
Table 4 code encoding/decoding mode is to setting up the influence that the internal user face connects
| Whether the both call sides coded system is compatible | Whether BSC has TC (codec) | Whether MSC SERVER has TC | Whether can realize LCLS (using TC) | Whether can realize LCLS (not using TC) | |
| 1 | Y | Y | Y | Y | Y |
| 2 | Y | Y | N | Y | Y |
| 3 | Y | N | Y | TC?is?not needed | Y |
| 4 | N | Y | Y | Y | N |
| 5 | N | Y | N | Y | N |
| 6 | N | N | Y | N | N |
As can be seen from the above table, appearance situation 1,2,3 o'clock, promptly when the voice coding modes of both call sides is compatible, BSC can set up the transmission channel (being that the internal user face connects) of direct transmission both call sides user-plane voice, conversation one side's user-plane voice directly can be sent to conversation the opposing party by this transmission channel.
When situation 4,5 occurring, be that the both call sides voice coding modes is incompatible, but when there is TC BSC inside, BSC sets up the internal user face and connects, a side the user-plane voice of being about to converse sends the TC in the BSC earlier to, after by TC the user-plane voice of receiving being converted to the coded system of the opposing party's compatibility, send conversation the opposing party again to.
When the situation 6 of appearance, promptly the both call sides voice coding modes is incompatible, and BSC inside can't realize the local function of exchange of local call when not having TC, promptly can not set up the internal user face and connect.
In above-mentioned steps (2), the follow-up internal user face of setting up connects and can be divided into following two kinds of situations:
(a) just carry out after the conversation under BSC is known current calling and opposite end calling is local call;
(b) BSC is receiving MSC Server foundation again behind the local exchange command of its transmission.
For above-mentioned situation (a), in order to guarantee carrying out smoothly of business such as follow-up value-added service (as Ring Back Tone service etc.) and Lawful Interception, BSC under the conversation participant is after finishing internal user face connection foundation, can finish message and inform that its internal user face of the latter connects and set up by reply assigning, as shown in Figure 9 to MSC Server.MSC Server if judge the preparation that the both sides that constitute this local call have finished local exchange, can use local exchange after receiving that message is finished in appointment.This moment, user-plane voice still can be by the transmission that is connected between BSC and the MGW.MSC Server can notify BSC to use the local function of exchange of local call when needed, and removes being connected between BSC and the MGW.Embodiment can be that MSC Server sends a piece of news to BSC, informs that BSC brings into use local exchange local call function, and this message is the signaling that a newly-increased MSC Server sends to BSC.After BSC receives this message, use the local function of exchange of local call, no longer transmit user-plane voice by being connected between BSC and the MGW, and remove its with MGW between be connected.
BSC informs that it can be to finish in appointment to add a local call in the message and connect and finish designator that its internal user face of MSC Server connects the mode of whether having set up, its form is as shown in table 5, the local call connection is finished designator and can be taken 8 bits, use the bit 1 of low level to indicate the local state that exchanges, other bit can be reserved.Particularly, can use bit 1 to indicate BSC whether to be ready to use the function of the local exchange of local call.When bit 1 value was 1, expression BSC can use the local function of exchange of local call, and when the value of bit 1 was 0, expression BSC can not use the local function of exchange of local call, and vice versa.
Table 5 local call connects finishes the designator form
For above-mentioned situation (b), the BSC under the conversation participant is a local call knowing that affiliated conversation is called out in current calling and opposite end, replys to assign to MSC Server and finishes message, and whether it can use local function of exchange to inform the latter.MSC Server if judging above-mentioned local call can use local function of exchange, then sends local exchange command to this BSC when follow-up the needs after receiving that message is finished in appointment, this message is the signaling that a newly-increased MSC Server sends to BSC.After BSC receives this order, set up the internal user face and connect, bring into use the local function of exchange of local call then, no longer transmit user-plane voice by being connected between BSC and the MGW, and remove its with MGW between be connected.
In order to be implemented in the system that in the call establishment local call is set up local exchange, comprising: Mobile Switching Center Server (MSC Server) and base station controller (BSC),
If MSC Server supports local exchange, then distribute unique identifier at least one side in the conversation participant;
BSC under the conversation participant is known unique identifier by assignment request message, and judges whether the conversation under the conversation participant is local call, if then follow-up local function of exchange is used in conversation.
MSC Server and BSC set up the function of local exchange to local call in realizing call establishment, possess the function that the various embodiments described above are described.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. in call establishment, local call is set up the local method that exchanges for one kind, comprising:
If Mobile Switching Center Server (MSC Server) is supported local exchange, then at least one side in the conversation participant distributes unique identifier, the base station controller (BSC) under the conversation participant is known described unique identifier by assignment request message;
If described BSC learns that the conversation under the conversation participant is a local call according to unique identifier described in the described assignment request message, then follow-up local function of exchange is used in described conversation.
2. the method for claim 1 is characterized in that,
It is described if MSC Server supports local exchange, then distribute unique identifier to be meant: described if MSC Server supports local exchange at least one side in the conversation participant, then be the conversation participant assigns talk information identifier under the described MSC Server, described call-information identifier is the identifier of opposite end conversation participant;
If described BSC is according to unique identifier described in the described assignment request message, learn that the conversation under the conversation participant is that local call is meant: described BSC is according to described call-information identifier, in described BSC scope, seek opposite end conversation participant, if search out, learn that then the conversation under the conversation participant is a local call.
3. method as claimed in claim 2 is characterized in that, described call-information identifier is informed described MSC Server by the MSC Server under the opposite end conversation participant.
4. method as claimed in claim 3 is characterized in that,
Described call-information identifier is the cic circuit identification code CIC or the call identifier of opposite end conversation participant;
BSC is according to knowing that according to described call-information identifier the conversation under the conversation participant is that local call is meant: BSC is after receiving assignment request message, if in this BSC scope, search out the cic circuit identification code CIC that carries opposite end conversation participant or the terminal of call identifier, know that then the conversation under the conversation participant is a local call.
5. the method for claim 1 is characterized in that,
It is described if MSC Server supports local exchange, then distribute unique identifier to be meant: if MSC Server supports local exchange at least one side in the conversation participant, the conversation participant that then is same conversation distributes identical calling sign indicating number, for different conversations distributes different calling sign indicating numbers; Described MSC Server distributes identical calling sign indicating number for the conversation participant;
If described BSC is according to unique identifier described in the described assignment request message, learn that the conversation under the conversation participant is that local call is meant: after BSC receives assignment request message, there is the calling that has the same call sign indicating number with the current talking participant on it if judge, knows that then these two the affiliated conversations of calling that have the same call sign indicating number are local call.
6. method as claimed in claim 5 is characterized in that, the described MSCServer that supports this locality to exchange will call out sign indicating number by the MSC Server under the opposite end conversation participant and distribute to opposite end conversation participant; MSC Server under the described opposite end conversation participant informs the calling sign indicating number of the described distribution of opposite end BSC by assignment request.
7. the method for claim 1 is characterized in that,
Described BSC also comprised the step that judges whether to use local function of exchange before setting up described internal user face connection, be specially:
Whether the voice coding modes of judging the calling and called both sides is compatible, as if compatible or incompatible but described BSC inside codec arranged, and then can use local function of exchange;
Otherwise do not have local function of exchange.
8. as any described method in the claim 1～7, it is characterized in that,
Described BSC uses local function of exchange to be meant follow-up to described conversation: described BSC is knowing that setting up the internal user face after the conversation of conversation under the participant is as local call connects, and finishes message and inform that its internal user face of the latter connects and set up by replying to described MSC Server to assign.
9. as any described method in the claim 1～7, it is characterized in that,
Described BSC uses local function of exchange to be meant follow-up to described conversation: after described BSC is knowing that the conversation of conversation under the participant is as local call, reply to assign to described MSC Server and finish message, whether it can use local function of exchange to inform the latter;
Described MSC Server if judging described local call can use local function of exchange, then sends local exchange command to described BSC when follow-up the needs after receiving that message is finished in described appointment;
After described BSC receives this order, set up the internal user face and connect, bring into use the local function of exchange of local call then.
10. in call establishment, local call is set up the local system that exchanges for one kind, comprising: Mobile Switching Center Server (MSC Server) and base station controller (BSC),
If described MSC Server supports local exchange, then distribute unique identifier at least one side in the conversation participant;
BSC under the described conversation participant is known described unique identifier by assignment request message, and judges whether the conversation under the conversation participant is local call, if then follow-up local function of exchange is used in described conversation.
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| CN2009101107804A CN102045704A (en) | 2009-10-14 | 2009-10-14 | Method and system for establishing local exchange for local call in call establishing process |
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| CN2009101107804A CN102045704A (en) | 2009-10-14 | 2009-10-14 | Method and system for establishing local exchange for local call in call establishing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109413681A (en) * | 2018-12-14 | 2019-03-01 | 安徽中船璞华科技有限公司 | A kind of data collection system based on GSm-R wireless telecom equipment |
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| US20030086418A1 (en) * | 2001-11-06 | 2003-05-08 | Mcintosh Chris P. | Intelligent private 3G network and method of operating the same |
| CN101159905A (en) * | 2007-11-07 | 2008-04-09 | 华为技术有限公司 | Local exchange method, core network equipment and network system of implementing in base station controller |
| CN101374355A (en) * | 2008-10-24 | 2009-02-25 | 华为技术有限公司 | Method and apparatus for implementing local exchange |
| CN101835218A (en) * | 2009-03-13 | 2010-09-15 | 中兴通讯股份有限公司 | Method for establishing local exchange of local conversations in call establishing process |
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| US20030086418A1 (en) * | 2001-11-06 | 2003-05-08 | Mcintosh Chris P. | Intelligent private 3G network and method of operating the same |
| CN101159905A (en) * | 2007-11-07 | 2008-04-09 | 华为技术有限公司 | Local exchange method, core network equipment and network system of implementing in base station controller |
| CN101374355A (en) * | 2008-10-24 | 2009-02-25 | 华为技术有限公司 | Method and apparatus for implementing local exchange |
| CN101835218A (en) * | 2009-03-13 | 2010-09-15 | 中兴通讯股份有限公司 | Method for establishing local exchange of local conversations in call establishing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109413681A (en) * | 2018-12-14 | 2019-03-01 | 安徽中船璞华科技有限公司 | A kind of data collection system based on GSm-R wireless telecom equipment |
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