CN101170750B - A method for realizing private key call service and mobile switching center - Google Patents

A method for realizing private key call service and mobile switching center Download PDF

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CN101170750B
CN101170750B CN2006101500344A CN200610150034A CN101170750B CN 101170750 B CN101170750 B CN 101170750B CN 2006101500344 A CN2006101500344 A CN 2006101500344A CN 200610150034 A CN200610150034 A CN 200610150034A CN 101170750 B CN101170750 B CN 101170750B
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speaker
end points
hearer
terminal
wmg
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CN101170750A (en
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殷昉
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The invention discloses a method for implementing private call service, and aims to implement the private call service in trunking communication after the circuit domain core network is structured with call control and bearing separation. The method comprises: when the calling terminal and the called terminal are positioned in the same one cell, establishing a public access termination and a context containing the public access termination, connecting the public access termination with the calling terminal and called terminal respectively, and establishing a public access termination loop back when the media gateway can support the loop-back mode; when the he calling terminal and the called terminal are positioned in different cells, establishing the bearing from the calling terminal to the called terminal when the media gateway can support the loop-back mode. The invention also discloses a mobile switching center server and a mobile switching center. Additionally, the invention specifically discloses bearing control flows during the private call establishment process, speech right switching process, calling cell switching process, and called cell reelection process.

Description

A kind of method and mobile switching centre that realizes secret call service
Technical field
The present invention relates to a kind of Clustering, relate in particular to a kind of method and mobile switching centre that realizes secret call service.
Background technology
Digital cluster system is an important branch of GSM, is a kind of GSM of supporting group's dispatch control, is mainly used in railway, public security, fire-fighting etc. and has the professional domain of scheduling of resource on a large scale.Different with common mobile communication, the maximum characteristics of trunking communication are that Speech Communication adopts PTT (PushTo Talk, press-and-talk) technology.
PTT refers to real-time stronger " point-to-point " or " putting multiple spot " Speech Communication.This professional half-duplex operation mode of using promptly has only a people to talk at one time.For ease of communication; As long as the calling party pins the press-and-talk key and just can make a call to a people or lineup; Need not dialing and wait for the other side's off-hook, call out demand working, set up phone group rapidly; Therefore, PTT be specially adapted between the inner members such as team, working group collaborative work with exchange.
At first, trunked communication system adopts the cluster private network that each group is set up alone.But employed technology of cluster private network that each group is independently set up and standard be disunity often, causes frequency utilization inefficiency, network construction cost and network operation expense high.Along with trunking communicating technology is developed by simulation-to-digital, the trunking communication networking gradually by the separate cluster private network to the transition of cluster public network direction.Because GSM (GlobalSystem for Mobile Communications; Global system for mobile communications) technical system is advanced; Have public network basis widely in the world, therefore, development is based on the extremely industry concern of trunked communication system of gsm communication network.
A cover GSM-R (international standard that is used for the railway mobile communication) has been made in Europe; It with the GSM communication network as service bearer; Can accomplish VBS (Voice broadcast service; Voice Broadcast Service) and VGCS cluster communication services such as (Voice group call service, voice group call services), realize basic voice dispatching call function.
Though the system of setting up according to GSM-R can provide the baseset group business; But compare with the cluster private network; It is less that the GSM-R system is fit to the applied business of special cluster department; For example special-purpose group digital system one integrated digital of two big main flows strengthens network (IDEN) and the land enhancing cluster wireless network architecture (TETRA) is all supported secret call service, and the GSM-R system can not support secret call service.Therefore, on gsm system, developed digital cluster system again, like the GT800 system, it can not only provide basic group service based on GSM, and the special group service that comprises secret call service can be provided.
GT800 is the Digital Clustering standard that China's Ministry of Information Industry organizes to set up.The Ministry of Information Industry had issued " the digital cluster system general technical based on the GSM technology requires " in 2004, had stipulated the index request of trunked communication system at aspects such as network configuration, business, function and main business workflows.2005, four motions about GT800 were passed through in the 24th meeting of 3GPPGERAN technical specification group, and the motion content relates to the establishment of GT800 frequency dependence standards project, core specification, base station testing standard and terminal test standard.Like this, GT800 also becomes the Digital Clustering standard of 3GPP normal structure approval.
Provide in the secret call service process in the GT800 system, individual call adopts half-duplex mode communication, promptly participates among two users of individual call, and pinning one of press-and-talk key can be with speech, and a side who does not pin the PTT key can only listen to.Individual call both sides' speaker is in the cluster multi call sending mode, and obedient side is in the cluster multi call receiving mode.When the individual call both sides were in same sub-district, the down channel of individual call shared by both parties voice service channel (TCH) was seized the up channel of TCH through the PTT mode; As individual call both sides during not in same sub-district, the individual call both sides take a wireless channel respectively, and the individual call both sides still seize right to speak through the PTT mode.
Along with the evolution of second generation communication system GSM to 3-G (Generation Three mobile communication system) UMTS (Universal MobileTelecommunications System, UMTS), change has taken place in the architecture of core net.3G R4 (Release 4, and promptly released version 4) circuit domain core net has afterwards adopted and has called out the framework that control separates with carrying.As shown in Figure 1, the MSC in the second generation communication system (mobile switching centre) is split as MSC Server (Mobile Switching Center Server) and MGW (WMG).Wherein MSC Server connects through the signaling plane that the Iu/A mouth is provided to RNC/BSC (radio network controller/base station controller), carries out the critical point route, calls out control and mobile management function; MGW then comprises terminal and the media management equipment (for example encoding and decoding conversion device, echo cancelltion equipment or single-tone/warning tone generator) of carrying; The user plane that is provided to RNC/BSC through the Iu/A mouth connects; Between MGW and RNC/BSC, and the Media Stream that transmits between MGW and the MGW is carried out media conversion and Frame Protocol conversion.Interface between MSC Server and MGW is called the Mc mouth, described Mc mouth with H.248/MEGACO (Media GatewayControl, media gateway controlling) as control protocol.H.248/MEGACO be ITU-T (InternationalTelecommunication Union-Telecommunication Standardization Sector; Standardization branch of international telecommunication union telecommunication) and IETF (Internet Engineering Task Force; The Internet engineering duty group) MGCP of common exploitation; Its support call controlled entity with carry separating of controlled entity, and carry separating of controlled entity and transfer entity.
H.248 with the end points (Termination) in the context (Context) as the basic call model.End points is the logic entity among the MGW, can send and receive one or more medium, and at any time, an end points belongs to and can only belong to a context, and end points can be represented time slot, artificial line and RTP (RealTime Protocol, real-time protocol (RTP)) stream etc.Context is the contact between some end points, and it describes topological relation and the parameter of medium mixing/exchange between the end points.Concrete H.248 signaling control process sees also the H.248 agreement of ITU-T and 29.232,23.205 standards of 3GPP.
Under the framework that calling is controlled with carrying separates, how to realize the carrying control that secret is professional, also do not provide description in the prior art.The present invention describes professional carrying model and the implementation method of cluster secret under the R4 framework.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of method and mobile switching centre that realizes secret call service, can under the framework that calling is controlled with carrying separates, solve the problem of the carrying control that how to realize that secret is professional.
Embodiments of the invention disclose a kind of method that realizes that secret communication is professional, comprising:
When speaker terminal and hearer terminal are positioned at same sub-district; Set up public access end points and the context that comprises public access end points; Public access end points is linked to each other with the hearer terminal with the speaker terminal respectively, and whether the supporting ring backflow model is set up public access end points loopback according to WMG;
When speaker terminal and hearer terminal were positioned at different districts, whether the supporting ring backflow model was set up the speaker terminal to the carrying between the hearer terminal according to WMG.
Embodiments of the invention also disclose a kind of Mobile Switching Center Server, comprising:
Judging unit is used to judge whether speaker terminal and hearer terminal are positioned at same sub-district, and judged result is issued carrying set up the unit;
Carry control unit, be used for whether supporting ring backflow model control WMG is set up the speaker terminal to the carrying between the hearer terminal according to the result of judging unit and WMG.
Wherein, described carrying control unit comprises that also first carries control sub unit and second and carry control sub unit, when the result of judging unit is positioned at same sub-district for speaker terminal and hearer terminal, starts the first carrying control sub unit; When the result of judging unit is positioned at different districts for speaker terminal and hearer terminal, start the second carrying control sub unit;
Described first carries control sub unit is used to control the context that WMG is set up public access end points and comprised public access end points; Public access end points is linked to each other with the hearer terminal with the speaker terminal respectively, and whether the supporting ring backflow model is set up public access end points loopback according to WMG;
Described second carries control sub unit is used for whether supporting ring backflow model control WMG is set up the speaker terminal to the carrying between the hearer terminal according to WMG.
After embodiments of the invention adopt the framework that calling is controlled with carrying separates to circuit domain core net; Realize the secret call service in the trunking communication, specifically described the carrying control flow in the process of setting up, right to speak transfer process, speaker minizone handoff procedure and the hearer's cell reselection process of individual call.
Description of drawings
Fig. 1 shows and calls out the sketch map that control separates with carrying;
The individual call when speaker and hearer are positioned at same sub-district that Fig. 2 shows first embodiment of the invention carries sketch map;
Fig. 3 shows the signaling diagram of setting up carrying shown in Figure 2;
What Fig. 4 (a), Fig. 4 (b) and Fig. 4 (c) showed first embodiment of the invention carries sketch map when speaker and hearer are positioned at different districts;
Fig. 5 shows the signaling diagram of setting up the carrying shown in Fig. 4 (a);
The carrying that Fig. 6 shows the right to speak conversion of individual call when speaker and hearer are positioned at same sub-district of first embodiment of the invention changes sketch map;
The carrying that Fig. 7 shows the right to speak conversion of individual call when speaker and hearer are positioned at different districts of first embodiment of the invention changes sketch map;
Fig. 8 shows the signaling process figure that sets up carrying shown in Figure 7;
The carrying that switch the sub-district of individual call when speaker and hearer are positioned at same sub-district that Fig. 9 shows first embodiment of the invention changes sketch map;
Figure 10 shows the signaling process figure that sets up carrying shown in Figure 9;
What Figure 11 showed first embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back sub-district switching of individual call when getting into the sub-district identical with the hearer;
Figure 12 shows the signaling process figure that sets up carrying shown in Figure 11;
What Figure 13 showed first embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back sub-district switching of individual call when getting into the sub-district different with the hearer;
Figure 14 shows the signaling process figure that sets up carrying shown in Figure 13;
What Figure 15 showed first embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back district reselecting of individual call when getting into the sub-district identical with the speaker;
Figure 16 shows the signaling process figure that sets up carrying shown in Figure 15;
What Figure 17 showed first embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back district reselecting of individual call when getting into the sub-district different with the speaker;
Figure 18 shows the signaling process figure that sets up carrying shown in Figure 17;
The carrying of the district reselecting of individual call when speaker and hearer are positioned at same sub-district that Figure 19 shows first embodiment of the invention changes sketch map;
Figure 20 shows the signaling process figure that sets up carrying shown in Figure 19;
The individual call when speaker and hearer are positioned at same sub-district that Figure 21 shows second embodiment of the invention carries sketch map;
Figure 22 shows the signaling diagram of setting up carrying shown in Figure 21;
What Figure 23 showed second embodiment of the invention carries sketch map when speaker and hearer are positioned at different districts;
Figure 24 shows the signaling diagram of setting up carrying shown in Figure 23;
The carrying that Figure 25 shows the right to speak conversion of individual call when speaker and hearer are positioned at same sub-district of second embodiment of the invention changes sketch map;
The carrying that Figure 26 shows the right to speak conversion of individual call when speaker and hearer are positioned at different districts of second embodiment of the invention changes sketch map;
Figure 27 shows the signaling process figure that sets up carrying shown in Figure 26;
The carrying that switch the sub-district of individual call when speaker and hearer are positioned at same sub-district that Figure 28 shows second embodiment of the invention changes sketch map;
Figure 29 shows the signaling process figure that sets up carrying shown in Figure 28;
What Figure 30 showed second embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back sub-district switching of individual call when getting into the sub-district identical with the hearer;
Figure 31 shows the signaling process figure that sets up carrying shown in Figure 30;
What Figure 32 showed second embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back sub-district switching of individual call when getting into the sub-district different with the hearer;
Figure 33 shows the signaling process figure that sets up carrying shown in Figure 32;
What Figure 34 showed second embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back district reselecting of individual call when getting into the sub-district identical with the speaker;
Figure 35 shows the signaling process figure that sets up carrying shown in Figure 34;
What Figure 36 showed second embodiment of the invention is positioned at different districts as speaker and hearer, and switches the carrying variation sketch map of back district reselecting of individual call when getting into the sub-district different with the speaker;
Figure 37 shows the signaling process figure that sets up carrying shown in Figure 36;
The carrying of the district reselecting of individual call when speaker and hearer are positioned at same sub-district that Figure 38 shows second embodiment of the invention changes sketch map;
Figure 39 shows the signaling process figure that sets up carrying shown in Figure 38;
Figure 40 shows the Mobile Switching Center Server of third embodiment of the invention;
Figure 41 shows the mobile switching centre of fourth embodiment of the invention.
Embodiment
Understand and realization the present invention for the ease of persons skilled in the art, combine accompanying drawing to describe embodiments of the invention at present.
Embodiments of the invention provide a kind of implementation method of secret call service, comprising: the speaker is to steps such as the right to speak conversion of the foundation of carrying between the hearer, individual call, speaker's switching, hearer's district reselecting.Whether support " LoopBack " (loopback) stream mode according to MGW below, describe above-mentioned each step respectively with two embodiment.
Embodiment one
In the present embodiment, MGW supports " LoopBack " (loopback) stream mode.
Separating under the gateway system, the speaker of individual call and hearer will insert core net, just need on WMG, create corresponding end points and context, and this end points directly links to each other with the A mouth circuit that speaker, hearer use.
Owing to individual call is the special group calling dispatch call between interior two portable terminals of group's scope; Its group call region only comprises the sub-district at the current place of individual call both sides; Though group call region can always include only the current area at calling and called portable terminal place along with individual call both sides' mobile dynamic mapping.Therefore, on WMG, maximum 2 accesses of establishment end points that only need are respectively applied for connection speaker terminal and hearer terminal.
One, the speaker is to the foundation of carrying between the hearer
Whether be positioned at same sub-district according to hearer and speaker, set up the speaker and can divide two kinds of situation, describe respectively in the face of this two situation down to the carrying between the hearer.
1, when the speaker of individual call and hearer are positioned at same sub-district; As shown in Figure 2; They can use identical wireless channel and land circuit to insert core net, therefore can public identical access end points T1 (the corresponding land circuit that connects the wireless access of BSC).At this moment, speaker terminal and hearer terminal all are connected on the T1, and therefore, the Media Stream on the T1 data feedback channel need be sent the down going channel of T1 again back to, and this can realize for " LoopBack " (loopback) through the stream mode that end points is set.
The speaker is described to the process of setting up of carrying between the hearer below in conjunction with Fig. 3.
ADD.request (increasing request) message is sent to MGW in step 31～32, MSC Server, requires to set up public access end points for speaker terminal and hearer terminal.If inserting end points is grouping end points (ATM or IP); MGW uses ADD.reply (increasing response) message response; Return its institute's context distributed (C1) and end points (T1) sign, what this was corresponding is the preparation load bearing process of describing among the 3GPP TS 29.232 (Prepare Bearer).If inserting end points is TDM termination; MSC Server has indicated Endpoint ID T1 in ADD.request message; MGW uses the ADD.reply message response to return its institute's context distributed (C1) sign, and what this was corresponding is the stick holding circuit process of describing among the 3GPP TS 29.232 (ReserveCircuit).
2, when speaker and hearer are positioned at different districts; Shown in Fig. 4 (a); Need to use different wireless channels and land circuit to insert core net; So need use different access end points (possibly be the land circuit that connects the wireless access of BSC, also possibly be the interoffice junction circuit that connects the PLMN/ISDN network, or connect the intra-office carrying of other MGW of this MSC Server).At this moment, the speaker terminal is connected on the T1, and the hearer terminal is connected on the T2.At this moment, only need set up the one-way transmission passage of T1 to T2, stream mode that therefore can T1 is set to " RecvOnly " (only receiving), and expression can only be flowed from contextual outside receiving media; The stream mode of T2 is set to " SendOnly " (only sending), and expression can only be to the contextual outside Media Stream that sends; T1 is set to unidirectional to the topology of T2, expression can only be sent Media Stream to T2 by T1.
The way flow pattern is set, and the two can choose one of which wantonly with unidirectional topology is set.For example, shown in Fig. 4 (b), the stream mode of T1, T2 can only be set, the topology (default topology is two-way, promptly can send Media Stream mutually) between T1, the T2 is not set; Shown in Fig. 4 (c); The unidirectional topology of T1 to T2 perhaps only is set; And the stream mode of T1, T2 adopts " SendRecv " (reception/transmission); Expression both can be flowed by receiving media, can send Media Stream again, and effect also is the same (realizing the one-way media transmission channel of speaker terminal to the hearer terminal).
Between T1 and the T2, also can use the transmitted in both directions passage, the topology between this moment T1, the T2 is two-way, and the stream mode of T1, T2 adopts " SendRecv ", and expression both can receiving media stream, can send Media Stream again.At this moment, can be on wave point, the down going channel that the control speaker closes it in the terminal avoids the user to hear noise.
About the set-up mode of one-way transmission passage and transmitted in both directions passage, hereinafter situation all is similarly, points out no longer one by one.
The speaker is described to the process of setting up of carrying between the hearer below in conjunction with Fig. 5.
ADD.request message is sent to MGW in step 51～52, MSC Server, require to set up the speaker for the speaker terminal and insert end points, and the stream mode that end points is set is RecvOnly.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns its institute's context distributed (C1) and end points (T1) sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T1 in ADD.request message, and MGW uses the ADD.reply message response to return its institute's context distributed (C1) sign.
Step 53～54:MSC Server sends ADD.request message to MGW, require to set up the hearer for the hearer terminal and insert end points, and the stream mode that end points is set is SendOnly, and T1 is to the unidirectional topology of this end points.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns end points (T2) sign that it distributes.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 in ADD.request message, and MGW uses the execution result of ADD.reply message response return command.
What use between T1 and the T2 among Fig. 5 is the one-way transmission passage, if will use the transmitted in both directions passage, only needs the topology between T1, the T2 is designated as two-way, and the stream mode of T1, T2 is designated as " SendRecv " and gets final product.
Two, the right to speak of individual call conversion
When making a speech, the speaker finishes, when the hearer successfully gets right to speak, and the role exchange at speaker terminal and hearer terminal.Whether be positioned at same sub-district according to hearer and speaker, the right to speak conversion of individual call can divide two kinds of situation, describes respectively in the face of this two situation down.
If 1 they be positioned at same sub-district owing to use public access end points to insert core net, on the Mc mouth, need not issue any signaling, can carry out corresponding operation on the wave point, up link is redistributed to new speaker.At this moment it is as shown in Figure 6 to carry change procedure.
If 2 they be positioned at different districts, be to use separately access end points to insert core net, insert when adopting the transmitted in both directions passage between the end points when the speaker inserts end points and hearer, need not do to carry and operate.But the speaker inserts end points and the hearer inserts when adopting the one-way transmission passage between the end points, needs signaling down on the Mc mouth, so that the direction of reversing bearer path.As shown in Figure 7, for the carrying model that is provided with the way flow pattern, need change both sides' stream mode, change former speaker (new hearer) into SendOnly from RecvOnly, change former hearer (new speaker) into RecvOnly from SendOnly; For the carrying model that is provided with unidirectional topology, need the direction of reversing topology, with the unidirectional topology of former speaker (new hearer), change the unidirectional topology of new speaker (former hearer) into to new hearer (former speaker) to former hearer (new speaker); For the carrying model that is provided with way flow pattern and unidirectional topology simultaneously, need change both sides' stream mode, and the direction of reversing topology.
With the carrying model that is provided with way flow pattern and unidirectional topology simultaneously is example, describes signaling process in the right to speak transfer process of individual call below in conjunction with Fig. 8.
Step 81～82:MSC Server sends MOD.request (revising request) message to MGW, and the stream mode that requires former speaker (new hearer) to be inserted end points T1 changes SendOnly into.MGW utilizes the execution result of MOD.reply (revising response) message return command.
Step 83～84:MSC Server sends MOD.request message to MGW, and requirement changes the stream mode that former hearer (new speaker) inserts end points T2 into RecvOnly, and revises topology and arrive T1 for T2.MGW utilizes the execution result of MOD.reply message return command.
Like this, reversing has just taken place in the role of T1, T2, and T1 inserts end points by original speaker and converts the hearer into and insert end points, and T2 inserts end points by original hearer and converts the speaker into and insert end points, and exchange has also taken place the role at speaker terminal, hearer terminal.
Three, the speaker minizone handoff procedure of individual call
Whether be positioned at same sub-district according to hearer and speaker; The right to speak conversion of individual call can divide three kinds of situation; Inserting end points and hearer with the speaker inserts and adopts the one-way transmission passage between the end points; And the carrying model that is provided with way flow pattern and unidirectional topology simultaneously is an example, describes respectively in the face of these three kinds of situation down.
1, be positioned at same sub-district as speaker and hearer, and the speaker minizone takes place when switching, the stream mode that needs to revise former public access end points inserts the stream mode of end points for the hearer, and newly-built speaker inserts end points.At this moment it is as shown in Figure 9 to carry change procedure.
Below in conjunction with Figure 10 the flow process that carrying shown in Figure 9 changes is described.
Step 101～102, MSC Server send MOD.request message to MGW, require to change the stream mode of former public access end points T1 into SendOnly, become the hearer and insert end points T1.MGW uses the execution result of MOD.reply message return command.
ADD.request message is sent to MGW in step 103～104, MSC Server, require to set up the speaker for the speaker terminal and insert end points T2, and the stream mode that end points is set is RecvOnly, topology is set arrives T1 for T2.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns end points (T2) sign that it distributes.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 in ADD.request message, and MGW uses the execution result of ADD.reply message response return command.
2, be positioned at different sub-districts as speaker and hearer, and the speaker minizone takes place switches, switch the back when getting into the sub-district identical, need delete former speaker and insert end points, and to revise the stream mode that former hearer inserts end points be the stream mode of public access end points with the hearer.At this moment it is shown in figure 11 to carry change procedure.
Below in conjunction with Figure 12 the signaling process that carrying shown in Figure 11 changes is described.
Step 121～122, MSC Server send SUB.request (deletion request) message to MGW, require former speaker is inserted end points T1 deletion.MGW uses the execution result of SUB.reply (deletion response) message return command.
Step 123～124, MSC Server send MOD.request message to MGW, and the stream mode that requires former hearer to be inserted end points T2 changes LoopBack into, becomes public access end points.MGW uses the execution result of MOD.reply message return command.
3, be positioned at different sub-districts as speaker and hearer, and the minizone takes place and switch in the speaker, switch the back when getting into the sub-district different, need set up new speaker and insert end points, and delete former speaker after accomplishing and insert end points switching with the hearer.At this moment it is shown in figure 13 to carry change procedure.
Below in conjunction with Figure 14 the signaling process that carrying shown in Figure 13 changes is described.
Step 141～142, MSC Server send ADD.request message to MGW, require to set up new speaker and insert end points T1 '.T1 ' isolates with the topology of other end points.MGW utilizes the execution result of ADD.reply message return command.
Step 143～144, detect switching after, MSC Server sends MOD.request message to MGW, requires that new speaker is inserted end points and changes T1 '＞T2 into to the topology that the hearer inserts end points, isolates T1 and T2 simultaneously.MGW utilizes the execution result of MOD.reply message return command.
After step 145～146, switching were accomplished, MSC Server sent SUB.request message to MGW, required former speaker's incoming end point deletion.MGW utilizes the execution result of SUB.reply message return command.
Four, hearer's cell reselection process of individual call
Whether be positioned at same sub-district according to hearer and speaker; The right to speak conversion of individual call can divide three kinds of situation; Inserting end points and hearer with the speaker inserts and adopts the one-way transmission passage between the end points; And the carrying model that is provided with way flow pattern and unidirectional topology simultaneously is an example, describes respectively in the face of these three kinds of situation down.
1, be positioned at different sub-districts as speaker and hearer, and district reselecting takes place the hearer, when getting into the sub-district identical after the gravity treatment, need to delete former hearer and insert end points, and to revise the stream mode that former speaker inserts end points is the stream mode of public access end points with the speaker.At this moment it is shown in figure 15 to carry change procedure.
Below in conjunction with Figure 16 the signaling process that carrying shown in Figure 15 changes is described.
Step 161～162, MSC Server send SUB.request message to MGW, require former hearer is inserted end points T2 deletion.MGW uses the execution result of SUB.reply message return command.
Step 163～164, MSC Server send MOD.request message to MGW, and the stream mode that requires former speaker to be inserted end points T1 changes LoopBack into, becomes public access end points.MGW uses the execution result of MOD.reply message return command.
2, be positioned at different sub-districts as speaker and hearer, and district reselecting takes place in the hearer, when getting into the sub-district different after the gravity treatment, need to delete former hearer and insert end points, and a newly-built hearer inserts end points with the speaker.At this moment it is shown in figure 17 to carry change procedure.
Below in conjunction with Figure 18 the signaling process that carrying shown in Figure 17 changes is described.
Step 181～182, MSC Server send SUB.request message to MGW, require former hearer is inserted end points T2 deletion.MGW uses the execution result of SUB.reply message return command.
ADD.request message is sent to MGW in step 183～184, MSC Server, require to set up new hearer for the hearer terminal and insert end points T2 ', and the stream mode that end points is set is RecvOnly.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns the end points that it distributes (T2 ') sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 ' in ADD.request message, and MGW uses ADD.reply message response, the execution result of return command.
3, be positioned at identical sub-district as speaker and hearer, and district reselecting takes place the hearer, when getting into the sub-district different with the speaker after the gravity treatment, the stream mode that needs the former public access end points of modification inserts the stream mode of end points for the speaker, and a newly-built hearer inserts end points.At this moment it is shown in figure 19 to carry change procedure.
Below in conjunction with Figure 20 the signaling process that carrying shown in Figure 19 changes is described.
Step 201～202, MSC Server send MOD.request message to MGW, require to change the stream mode of former public access end points T1 into RecvOnly, become the speaker and insert end points T1.MGW uses the execution result of MOD.reply message return command.
ADD.request message is sent to MGW in step 203～204, MSC Server, require to set up the hearer for the hearer terminal and insert end points T2, and the stream mode that end points is set is SendOnly.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns end points (T2) sign that it distributes.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 in ADD.request message, and MGW uses ADD.reply message response, the execution result of return command.
Embodiment two
In the present embodiment, MGW does not support " LoopBack " (loopback) stream mode.
In embodiment one, because MGW supporting ring backflow model, when speaker and hearer were positioned at same sub-district, their shared identical access end points were sent the Media Stream on the end points data feedback channel back to the down going channel of end points again.Because in 29.232 standards of 3GPP, require not use the LoopBack stream mode, therefore, can pass through another context, the loopback of realization Media Stream as MGW not during the supporting ring backflow model.Describe the implementation method of secret call service during the supporting ring backflow model not as MGW below in detail, this method comprises equally: the speaker is to steps such as the right to speak conversion of the foundation of carrying between the hearer, individual call, speaker's switching, hearer's district reselecting.Through embodiment above-mentioned each step is described respectively below.
One, the speaker is to the foundation of carrying between the hearer
Whether be positioned at same sub-district according to hearer and speaker, set up the speaker and can divide two kinds of situation, describe respectively in the face of this two situation down to the carrying between the hearer.
1, when the speaker of individual call and hearer are positioned at same sub-district, shown in figure 21, can set up two contexts, realize the loopback of Media Stream.
Below in conjunction with Figure 22 the signaling process that carrying shown in Figure 21 changes is described.
ADD.request message is sent to MGW in step 2201～2202, MSC Server, requires to set up public access end points for speaker terminal and hearer terminal.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns its institute's context distributed (C2) and end points (T1) sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T1 in ADD.request message, and MGW uses the ADD.reply message response, returns its institute's context distributed (C2) sign.
Step 2203～2206:MSC Server sends ADD.request message to MGW, two inner connection end points (up end points, the descending end points of acting on behalf of of speaker acted on behalf of of called after speaker) of the speaker that requires in another is different from the context of C2, to connect.If said end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns its institute's context distributed (C1) and end points (T10, T12) sign.If inner connection end point is a TDM termination, MSC Server has indicated Endpoint ID T10, T12 in ADD.request message, and MGW uses the ADD.reply message response, returns its institute's context distributed (C1) sign.Notice that T10 is provided with the stream mode of RecvOnly, the stream mode that T12 is provided with SendOnly; But T10, T12 use the stream mode of SendRecv also to be fine, and at this moment between T10, the T12 unidirectional topology can be set, and also two-way topology can be set.
Step 2207～2210:MSC Server sends ADD.request message to MGW, requires in context C2, to set up two inner connection end points (the up connection end point of called after speaker, the descending connection end point of speaker), is connected to context C1.If said end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns end points (T11, the T13) sign that it distributes.If inner connection end point is a TDM termination, MSC Server has indicated Endpoint ID T11, T13 in ADD.request message, and MGW uses the ADD.reply message response.Notice that T13 is provided with the stream mode of RecvOnly, the stream mode that T11 is provided with SendOnly; But T11, T13 use the stream mode of SendRecv also to be fine, and at this moment, T1 will be set to the unidirectional topology of T11, and T13 will be set to the unidirectional topology of T1.
Like this; Though do not use the stream mode of LoopBack, the Media Stream of the data feedback channel of public access end points T1 is delivered to the up end points of acting on behalf of of speaker through the up connection end point of speaker; Deliver to the descending end points of acting on behalf of of speaker again; Deliver to the descending connection end point of speaker again, deliver to the down going channel of public access end points again, also realized the effect of loopback.
In addition; Though public access end points, the up connection end point of speaker and the descending connection end point of speaker all are in the same context; But public access end points is the one-way transmission passage to the up connection end point of speaker; The descending connection end point of speaker also is the one-way transmission passage to public access end points, does not have the audio mixing demand, need not use conference bridge resources.
2, when speaker and hearer are positioned at different districts, at first in speaker's context C2, set up the speaker and insert end points; In proxy context C1, set up up end points and the descending end points of acting on behalf of of speaker acted on behalf of of speaker then, adopt unidirectional topology or two-way topology between them; In C2, set up the up connection end point of speaker, and make it with C1 in the up end points of acting on behalf of of speaker link to each other, the up connection end point of speaker inserts end points with the speaker simultaneously and links to each other, the speaker is set inserts end points to perhaps two-way topology of the unidirectional topology of the up end points of speaker; In hearer's context C3, set up the hearer and insert end points; In C3, set up the descending connection end point of speaker, and make it with C1 in the descending end points of acting on behalf of of speaker link to each other, the descending connection end point of speaker inserts end points with the hearer simultaneously and links to each other, and perhaps two-way topology of unidirectional topology that the descending end points of speaker inserts end points to the hearer is set.The speaker inserts that end points, speaker are up acts on behalf of the stream mode that end points, the descending connection end point of speaker can be provided with RecvOnly, and the stream mode of SendRecv also can be set; The hearer inserts that end points, speaker are descending acts on behalf of the stream mode that end points, the up connection end point of speaker can be provided with SendOnly, and the stream mode of SendRecv also can be set.At this moment loading establishing process is shown in figure 23.
Below in conjunction with Figure 24 the signaling process that carrying shown in Figure 23 is set up is described.
ADD.request message is sent to MGW in step 2401～2402, MSC Server, require to set up the speaker for the speaker terminal and insert end points, and the stream mode that end points is set is RecvOnly.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns its institute's context distributed (C2) and end points (T1) sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T1 in ADD.request message, and MGW uses the ADD.reply message response to return its institute's context distributed (C2) sign.
Step 2403～2406, MSC Server send ADD.request message to MGW; Up end points and the descending end points of acting on behalf of of speaker acted on behalf of of speaker set up in requirement; Alternatively; It is that the descending stream mode of acting on behalf of end points of RecvOnly and speaker is SendOnly that the up stream mode of acting on behalf of end points of speaker can be set, but also can their stream mode be set to SendRecv.If act on behalf of end points is grouping end points (ATM or IP), and MGW uses the ADD.reply message response, returns its institute's context distributed (C1) and end points (T10, T12) sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T10, T12 in ADD.request message, and MGW uses the ADD.reply message response to return its institute's context distributed (C1) sign.
Step 2407～2408, MSC Server send ADD.request message to MGW; Requirement is in speaker's context C2; Set up the up connection end point of speaker; And make it with C1 in the up end points of acting on behalf of of speaker link to each other, the up connection end point of speaker inserts end points with the speaker simultaneously and links to each other, the speaker is set inserts end points to perhaps two-way topology of the unidirectional topology of the up end points of speaker.If connection end point is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns end points (T11) sign that it distributes.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T11 in ADD.request message, and MGW uses the ADD.reply message response to return its command execution results.
ADD.request message is sent to MGW in step 2409～2410, MSC Server, require to set up the hearer for the hearer terminal and insert end points, and the stream mode that end points is set is SendOnly.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns its institute's context distributed (C3) and end points (T2) sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 in ADD.request message, and MGW uses the ADD.reply message response to return its institute's context distributed (C3) sign.
Step 2411～2412, MSC Server send ADD.request message to MGW; Requirement is in hearer's context C3; Set up the descending connection end point of speaker; And make it with C1 in the descending end points of acting on behalf of of speaker link to each other, the descending connection end point of speaker inserts end points with the hearer simultaneously and links to each other, and perhaps two-way topology of unidirectional topology that the descending connection end point of speaker inserts end points to the hearer is set.If connection end point is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns end points (T13) sign that it distributes.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T13 in ADD.request message, and MGW uses the ADD.reply message response to return its command execution results.
Two, the right to speak of individual call conversion
When making a speech, the speaker finishes, when the hearer successfully gets right to speak, and the role exchange at speaker terminal and hearer terminal.Whether be positioned at same sub-district according to hearer and speaker, the right to speak conversion of individual call can divide two kinds of situation, describes respectively in the face of this two situation down.
If 1 speaker and hearer are positioned at same sub-district, owing to use public access end points to insert core net, on the Mc mouth, need not issue any signaling, can carry out corresponding operation on the wave point, up link is redistributed to new speaker.At this moment it is shown in figure 25 to carry change procedure.
If 2 speakers and hearer are positioned at different districts; End points and the up connection end point of speaker, speaker are up to act on behalf of that end points and speaker are descending to be acted on behalf of end points, the descending connection end point of speaker and hearer and insert when all having used the transmitted in both directions passage between the end points when the speaker inserts, and does not do any carrying operation.End points and the up connection end point of speaker, speaker are up to act on behalf of that end points and speaker are descending to be acted on behalf of end points, the descending connection end point of speaker and hearer and insert when having one to use the one-way transmission passage between the end points when the speaker inserts; The speaker is inserted end points T1 and the hearer inserts end points T2 transposition; Be that the speaker inserts end points T1 and from speaker's context C2, moves among hearer's context C3; The descending connection end point T13 of speaker inserts end points T1 to the speaker unidirectional topology or two-way topology are set; If T1 is provided with the RecvOnly stream mode before this, change to the SendOnly stream mode, become the hearer and insert end points T1 so the speaker inserts end points T1; Subsequently the hearer being inserted end points T2 moves among speaker's context C2 from hearer's context C3; The hearer is set inserts unidirectional topology or the two-way topology of end points T2 to the up connection end point T11 of speaker; If T2 is provided with the SendOnly stream mode before this; Change to the RecvOnly stream mode, become the speaker and insert end points T2 so the hearer inserts end points T2.At this moment it is shown in figure 26 to carry change procedure.
Below in conjunction with Figure 27 the signaling process that carrying shown in Figure 26 changes is described.
Step 2701～2702, MSC Server send MOV.request (moving request) message to MGW; Requirement inserts end points T1 with former speaker (new hearer) and from speaker's context C2, moves among hearer's context C3; The descending connection end point T13 of speaker inserts end points T1 to the speaker unidirectional topology or two-way topology are set; If T1 is provided with the RecvOnly stream mode before this, change to the SendOnly stream mode.MGW utilizes the execution result of MOV.reply (moving response) message return command.
Step 2703～2704, MSC Server send MOV.request message to MGW; Requirement inserts end points T2 with former hearer (new speaker) and from hearer's context C3, moves among speaker's context C2; The hearer is set inserts unidirectional topology or the two-way topology of end points T2 to the up connection end point T11 of speaker; If T2 is provided with the SendOnly stream mode before this, change to the RecvOnly stream mode.MGW utilizes the execution result of MOV.reply message return command.
Like this, reversing has just taken place in the role of T1, T2, and T1 inserts end points by original speaker and converts the hearer into and insert end points, and T2 inserts end points by original hearer and converts the speaker into and insert end points, and exchange has also taken place the role at speaker terminal, hearer terminal.
Three, the speaker minizone handoff procedure of individual call
Whether be positioned at same sub-district according to hearer and speaker; The right to speak conversion of individual call can divide three kinds of situation; Inserting end points and hearer with the speaker inserts and adopts the one-way transmission passage between the end points; And the carrying model that is provided with way flow pattern and unidirectional topology simultaneously is an example, describes respectively in the face of these three kinds of situation down.
1, is positioned at same sub-district as speaker and hearer; And when the minizone switching takes place in the speaker; The stream mode (SendRecv) of former public access end points T1 is changed into the stream mode (SendOnly) that the hearer inserts end points or keeps stream mode SendRecv constant, become the hearer and insert end points T1; In speaker's context C3, set up the speaker and insert end points T2, it is RecvOnly or SendRecv that stream mode is set; The up connection end point T11 of speaker is moved among speaker's context C3 from hearer's context C2, and insert end points T2 and link to each other, the speaker is set inserts unidirectional topology or the two-way topology of end points T2 to the up connection end point T11 of speaker with speaker among the C3.At this moment it is shown in figure 28 to carry change procedure.
Below in conjunction with Figure 29 the signaling process that carrying shown in Figure 28 changes is described.
Step 2901～2902, MSC Server send MOD.request message to MGW, require to change the stream mode (SendRecv) of former public access end points T1 into stream mode (SendOnly) that the hearer inserts end points.MGW utilizes the execution result of MOD.reply message return command.
ADD.request message is sent to MGW in step 2903～2904, MSC Server, require to set up the speaker for the speaker terminal and insert end points, and the stream mode that end points is set is RecvOnly.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns its institute's context distributed (C3) and end points (T2) sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 in ADD.request message, and MGW uses the ADD.reply message response to return its institute's context distributed (C3) sign.
Step 2905～2906:MSC Server sends MOV.request message to MGW; Requirement moves to the up connection end point T11 of speaker among speaker's context C3 from hearer's context C2; And insert end points T2 and link to each other with speaker among the C3, the speaker is set inserts unidirectional topology or the two-way topology of end points T2 to the up connection end point T11 of speaker.MGW utilizes the execution result of MOV.reply message return command.
2, be positioned at different sub-districts as speaker and hearer, and the minizone takes place and switch in the speaker, switch the back when getting into the sub-district identical, delete former speaker and insert end points T1 with the hearer; The up connection end point T11 of speaker is moved to from speaker's context C2 among hearer's context C3, insert end points T2 with the hearer and link to each other, specify the hearer to insert the unidirectional topology of end points T2 to the up connection end point T11 of speaker; If the hearer inserts end points T2 and is provided with stream mode SendOnly before this, then revise the stream mode (SendOnly) that the hearer inserts end points and be the stream mode (SendRecv) of public access end points; So inserting end points T2, the hearer becomes public access end points T2.At this moment it is shown in figure 30 to carry change procedure.
Below in conjunction with Figure 31 the signaling process that carrying shown in Figure 30 changes is described.
Step 3101～3102, MSC Server send SUB.request (deletion request) message to MGW, require the former speaker of deletion to insert end points T1.MGW utilizes the execution result of SUB.reply (deletion response) message return command.
Step 3103～3104, MSC Server send MOV.request message to MGW; Requirement moves to the up connection end point T11 of speaker among hearer's context C3 from speaker's context C2; Insert end points T2 with the hearer and link to each other, specify the hearer to insert the unidirectional topology of end points T2 to the up connection end point T11 of speaker.MGW utilizes the execution result of MOV.reply message return command.
If step 3105～3106 hearers insert end points T2 and are provided with stream mode SendOnly before this; MSC Server sends MOD.request message to MGW, requires the stream mode (SendOnly) that the hearer inserts end points is changed into the stream mode (SendRecv) of public access end points; So inserting end points T2, the hearer becomes public access end points T2.MGW utilizes the execution result of MOD.reply message return command.
3, be positioned at different sub-districts as speaker and hearer; And the minizone takes place and switches in the speaker; When getting into the sub-district different after switching, in speaker's context C2, set up new speaker and insert end points T1 ', the stream mode of RecvOnly or SendRecv is set with the hearer; Specify the speaker to insert unidirectional topology or the two-way topology of end points T1 ', isolate former speaker and insert end points T1 and the up connection end point T11 of speaker to the up connection end point of speaker; And the former speaker of deletion inserts end points T1 after switching completion.At this moment it is shown in figure 32 to carry change procedure.
Below in conjunction with Figure 33 the signaling process that carrying shown in Figure 32 changes is described.
ADD.request message is sent to MGW in step 3301～3302, MSC Server, require in speaker's context C2, to set up new speaker for the speaker terminal and insert end points, and the stream mode that end points is set is RecvOnly or SendRecv.Specify the speaker to insert unidirectional topology or the two-way topology of end points T1 ', isolate former speaker and insert end points T1 and the up connection end point T11 of speaker to the up connection end point of speaker.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns the end points that it distributes (T1 ') sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T1 ' in ADD.request message, and MGW uses the execution result of ADD.reply message response return command.
Step 3303～3304, MSC Server send SUB.request message to MGW, require the former speaker of deletion to insert end points T1.MGW utilizes the execution result of SUB.reply message return command.
Four, hearer's cell reselection process of individual call
Whether be positioned at same sub-district according to hearer and speaker; The right to speak conversion of individual call can divide three kinds of situation; Inserting end points and hearer with the speaker inserts and adopts the one-way transmission passage between the end points; And the carrying model that is provided with way flow pattern and unidirectional topology simultaneously is an example, describes respectively in the face of these three kinds of situation down.
1, be positioned at different sub-districts as speaker and hearer, and district reselecting takes place in the hearer, when getting into the sub-district identical after the gravity treatment, delete former hearer and insert end points T2 with the speaker; The descending connection end point T13 of speaker is moved to from hearer's context C3 among speaker's context C2, insert end points T1 with the speaker and link to each other, specify the descending connection end point T13 of speaker to insert the unidirectional topology of end points T1 to the speaker; If the speaker inserts the stream mode that end points is provided with RecvOnly before this, then revise the stream mode (RecvOnly) that the speaker inserts end points and be the stream mode (SendRecv) of public access end points; So inserting end points T1, the speaker becomes public access end points T1.At this moment it is shown in figure 34 to carry change procedure.
Below in conjunction with Figure 35 the signaling process that carrying shown in Figure 34 changes is described.
Step 3501～3502, MSC Server send SUB.request message to MGW, require the former hearer of deletion to insert end points T2.MGW utilizes the execution result of SUB.reply message return command.
Step 3503～3504, MSC Server send MOV.request message to MGW; Requirement moves to the descending connection end point T13 of speaker among speaker's context C2 from hearer's context C3; Insert end points T1 with the speaker and link to each other, specify the descending connection end point T13 of speaker to insert the unidirectional topology of end points T1 to the speaker.MGW utilizes the execution result of MOV.reply message return command.
If the stream mode that end points is provided with RecvOnly is inserted in step 3505～3506 speaker before this; MSCServer sends MOD.request message to MGW, and the stream mode (RecvOnly) that requires the modification speaker to insert end points is the stream mode (SendRecv) of public access end points; So inserting end points T1, the speaker becomes public access end points T1.MGW utilizes the execution result of MOD.reply message return command.
2, be positioned at different sub-districts as speaker and hearer; And district reselecting takes place in the hearer; When getting into the sub-district different with the speaker after the gravity treatment, the former hearer among the deletion hearer context C3 inserts end points T2, and a newly-built hearer inserts end points T2 '; It is SendOnly or SendRecv that stream mode is set, and the descending connection end point of speaker inserts end points T2 ' to the hearer unidirectional topology or two-way topology are set.At this moment it is shown in figure 36 to carry change procedure.
Below in conjunction with Figure 37 the signaling process that carrying shown in Figure 36 changes is described.
Step 3701～3702, MSC Server send SUB.request message to MGW, require the former hearer among the deletion hearer context C3 to insert end points T2.MGW utilizes the execution result of SUB.reply message return command.
ADD.request message is sent to MGW in step 3703～3704, MSC Server, require in hearer's context C3, to set up new hearer for the hearer terminal and insert end points, and the stream mode that end points is set is SendOnly or SendRecv.The descending connection end point T13 of speaker inserts end points T2 ' to the hearer unidirectional topology or two-way topology are set.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns the end points that it distributes (T2 ') sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 ' in ADD.request message, and MGW uses the execution result of ADD.reply message response return command.
3, be positioned at identical sub-district as speaker and hearer; And district reselecting takes place in the hearer; When getting into the sub-district different after the gravity treatment with the speaker; Change former public access end points T1 (SendRecv) into stream mode (RecvOnly) that the speaker inserts end points, perhaps keep the stream mode of SendRecv constant, public access end points T1 becomes the speaker and inserts end points T1; In hearer's context C3, set up the hearer and insert end points T2, it is SendOnly or SendRecv that stream mode is set; The descending connection end point T13 of speaker is moved among hearer's context C3 from speaker's context C2, and insert end points T2 and link to each other, specify the descending connection end point T13 of speaker to insert unidirectional topology or the two-way topology of end points T2 to the hearer with hearer among the C3.At this moment it is shown in figure 38 to carry change procedure.
Below in conjunction with Figure 39 the signaling process that carrying shown in Figure 38 changes is described.
Step 3901～3902, MSC Server send MOD.request message to MGW, require to change former public access end points T1 (SendRecv) into stream mode (RecvOnly) that the speaker inserts end points.MGW utilizes the execution result of MOD.reply message return command.
ADD.request message is sent to MGW in step 3903～3904, MSC Server, require to set up new hearer for the hearer terminal and insert end points, and the stream mode that end points is set is SendOnly or SendRecv.If inserting end points is grouping end points (ATM or IP), MGW uses the ADD.reply message response, returns its institute's context distributed (C3) and end points (T2) sign.If inserting end points is TDM termination, MSC Server has indicated Endpoint ID T2 in ADD.request message, and MGW uses ADD.reply message to return its institute's context distributed (C3) sign.
Step 3905～3906, MSC Server send MOV.request message to MGW; Requirement moves to the descending connection end point T13 of speaker among hearer's context C3 from speaker's context C2; And insert end points T2 and link to each other with hearer among the C3, specify the descending connection end point T13 of speaker to insert unidirectional topology or the two-way topology of end points T2 to the hearer.MGW utilizes the execution result of MOV.reply message return command.
Shown in figure 40, the third embodiment of the present invention also discloses a kind of Mobile Switching Center Server, and described Mobile Switching Center Server is used to control WMG and sets up the speaker terminal to the carrying between the hearer terminal.
Described Mobile Switching Center Server comprises: judging unit is used to judge whether speaker terminal and hearer terminal are positioned at same sub-district, and judged result is issued the carrying control unit; Carry control unit, be used for whether supporting ring backflow model control WMG is set up the speaker terminal to the carrying between the hearer terminal according to the result of judging unit and WMG; The right to speak TCU transfer control unit is used for whether whether supporting ring backflow model, speaker terminal and hearer terminal are positioned at same sub-district control WMG and change right to speak according to WMG; Speaker minizone switch control unit is used for whether whether supporting ring backflow model, speaker terminal and hearer terminal are positioned at same sub-district control WMG and carry out the speaker minizone and switch according to WMG; Hearer's district reselecting control unit is used for whether whether supporting ring backflow model, speaker terminal and hearer terminal are positioned at same sub-district control WMG and carry out hearer's district reselecting according to WMG.
Described carrying control unit comprises that first carries control sub unit and second and carry control sub unit, when the result of judging unit is positioned at same sub-district for speaker terminal and hearer terminal, starts the first carrying control sub unit; When the result of judging unit is positioned at different districts for speaker terminal and hearer terminal, start the second carrying control sub unit; Described first carries control sub unit is used to control the context that WMG is set up public access end points and comprised public access end points; Public access end points is linked to each other with the hearer terminal with the speaker terminal respectively, and whether the supporting ring backflow model is set up public access end points loopback according to WMG; Described second carries control sub unit is used for whether supporting ring backflow model control WMG is set up the speaker terminal to the carrying between the hearer terminal according to WMG.
Described first carries control sub unit comprises: access control unit, terminal is used to control WMG and sets up public access end points and the context that comprises public access end points, and public access end points is linked to each other with the hearer terminal with the speaker terminal respectively; The loopback stream mode is confirmed the unit, be used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the loopback control unit; The loopback control unit is used for confirming that according to the loopback stream mode result of unit controls WMG and sets up public access end points loopback.
Described loopback control unit comprises the first loopback control sub unit and the second loopback control sub unit, when the loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, starts the first loopback control sub unit; The result who confirms the unit when the loopback stream mode is WMG not during the supporting ring backflow model, starts the second loopback control sub unit; The described first loopback control sub unit is used to control WMG public access end points is made as the loopback stream mode; The described second loopback control sub unit; Be used for controlling WMG and set up up connection end point of speaker and the descending connection end point of speaker at described context; And public connection end point is set to unidirectional topology to the up connection end point of speaker, and the descending connection end point of speaker is set to unidirectional topology to public connection end point; Set up that the speaker is up to act on behalf of that end points and speaker are descending to be acted on behalf of end points and comprise up end points and the descending context of acting on behalf of end points of speaker acted on behalf of of speaker; And the up end points of acting on behalf of of speaker is linked to each other with the up connection end point of speaker, the descending end points of acting on behalf of of speaker links to each other with the descending connection end point of speaker.
Described second carries control sub unit comprises: the loopback stream mode is confirmed the unit, be used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the carrying control module; First carries control module, is used for confirming that according to the loopback stream mode result of unit controls WMG and sets up the speaker terminal to the carrying between the hearer terminal.
Described first carries control module comprises that first carries the control submodule and the second carrying control submodule.When described loopback stream mode confirms that the result of unit is WMG supporting ring backflow model; Start first and carry the control submodule; The result that described loopback stream mode is confirmed the unit is WMG not during the supporting ring backflow model, starts second and carries the control submodule.The described first carrying control submodule is used to set up the speaker and inserts end points and comprise that the speaker inserts the context of end points; And in said context, set up the hearer and insert end points; And make the speaker insert end points to link to each other with the speaker terminal, make the hearer insert end points and link to each other with the hearer terminal; The described second carrying control submodule is used to set up the speaker and inserts end points, the up connection end point of speaker and comprise that the speaker inserts the context of end points and the up connection end point of speaker; And the speaker is inserted end points link to each other with the speaker terminal, the speaker is inserted end points link to each other with the up connection end point of speaker; Set up the hearer and insert end points, the descending connection end point of speaker and comprise that the hearer inserts the context of end points and the descending connection end point of speaker, the hearer is inserted end points link to each other, the hearer is inserted end points link to each other with the descending connection end point of speaker with the hearer terminal; Set up that the speaker is up to act on behalf of that end points and speaker are descending to be acted on behalf of end points and comprise up end points and the descending context of acting on behalf of end points of speaker acted on behalf of of speaker; And the up end points of acting on behalf of of speaker linked to each other with the up connection end point of speaker, the descending end points of acting on behalf of of speaker links to each other with the descending connection end point of speaker.
Described right to speak TCU transfer control unit comprises that the loopback stream mode confirms unit, the first right to speak conversion and control subelement and the second right to speak conversion and control subelement.Described loopback stream mode confirms that the unit is used for confirming whether supporting ring backflow model of WMG, and starts the first right to speak conversion and control subelement or the second right to speak conversion and control subelement according to the result who confirms.When result that the loopback stream mode is confirmed the unit under the WMG supporting ring backflow model situation, and the speaker starts the first right to speak conversion and control subelement when inserting end points and hearer and inserting end points and be provided with the way flow pattern; When result that the loopback stream mode is confirmed the unit is WMG not under the supporting ring backflow model situation; And the speaker inserts that end points and the up connection end point of speaker, speaker are up to be acted on behalf of when end points and speaker are descending to be acted on behalf of end points, the descending connection end point of speaker and hearer and insert between the end points one of them unidirectional topology is set, and starts the second right to speak conversion and control subelement.
The described first right to speak conversion and control subelement is used to control the WMG speaker and inserts end points and be set to only send stream mode, and the hearer inserts end points and is set to only receive stream mode; Insert when being provided with unidirectional topology between the end points when the speaker inserts end points and hearer, the speaker is inserted end points and hearer insert between the end points topology and be inverted;
The described second right to speak conversion and control subelement is used for controlling WMG and the hearer is inserted end points is moved into and comprises that the speaker inserts the context of end points; And the hearer is inserted end points link to each other with the up access end points of speaker; The speaker is inserted end points be moved into and comprise that the hearer inserts in the context of end points, the descending access end points of speaker is inserted end points with the speaker link to each other.
Described speaker minizone switch control unit comprises that the speaker terminal moves definite unit, the first speaker minizone switching controls subelement, the second speaker minizone switching controls subelement and the 3rd speaker minizone switching controls subelement.Described speaker moves at the terminal and confirms that the unit is used for confirming the moving direction at speaker terminal; When the speaker terminal move the result that confirms the unit for the speaker terminal when the sub-district at place, hearer terminal moves to other sub-district, start the first speaker minizone switching controls subelement; When the speaker terminal is moved the result who confirms the unit and moved to the sub-district at place, hearer terminal from other sub-district for the speaker terminal, start the second speaker minizone switching controls subelement; When the speaker terminal move the result that confirms the unit for the speaker terminal from the hearer terminal not the sub-district move to other hearer terminal not the sub-district time, start the 3rd speaker minizone switching controls subelement.The described first speaker minizone switching controls subelement, the second speaker minizone switching controls subelement and the 3rd speaker minizone switching controls subelement all are used for when the sub-district switching takes place at the speaker terminal, and the control WMG rebulids the speaker terminal to the carrying between the hearer terminal.
The described first speaker minizone switching controls subelement comprises: the loopback stream mode is confirmed the unit, is used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues second and carries control module; Second carries control module, is used for confirming that according to the loopback stream mode result of unit controls WMG and rebulids the speaker terminal to the carrying between the hearer terminal with the mode that newly-built speaker inserts end points.Described second carries control module comprises that the 3rd carries control submodule and the 4th carrying control submodule.When described loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, start the 3rd and carry the control submodule.The result that described loopback stream mode is confirmed the unit is WMG not during the supporting ring backflow model, starts the 4th and carries the control submodule.The described the 3rd carries the control submodule is used for setting up the speaker at former context and inserts end points, and makes the speaker insert end points to link to each other with the speaker terminal; The speaker inserts end points and inserts end points with the hearer and link to each other.Described the 4th carrying control sub unit is used to set up the speaker and inserts end points and comprise that the speaker inserts the context of end points; And make the speaker insert end points to link to each other with the speaker terminal; The up connection end point of speaker is moved to the described speaker of comprising insert in the context of end points from former context, and the speaker is inserted end points link to each other with the up connection end point of speaker.
The described second speaker minizone switching controls subelement comprises: the loopback stream mode is confirmed the unit, is used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the 3rd and carries control module; The 3rd carries control module, is used for confirming that according to the loopback stream mode result of unit controls WMG and rebulids the speaker terminal to the carrying between the hearer terminal with the mode that the deletion speaker inserts end points.The described the 3rd carries control module comprises that the 5th carries control submodule and the 6th carrying control submodule.When described loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, start the 5th and carry the control submodule.The result that described loopback stream mode is confirmed the unit is WMG not during the supporting ring backflow model, starts the 6th and carries the control submodule.The described the 5th carries the control submodule is used to control WMG deletion speaker and inserts end points, the hearer is inserted end points link to each other with the speaker terminal, and the hearer inserts end points and is set to the loopback stream mode.Described the 6th carrying control submodule is used to control WMG deletion speaker and inserts end points, and the up connection end point of speaker is moved to from speaker's context in hearer's context, inserts end points with the hearer and links to each other, and makes the hearer insert end points and links to each other with the speaker terminal.
Described the 3rd speaker minizone switching controls subelement comprises: the loopback stream mode is confirmed the unit, is used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the 4th and carries control module; The 4th carries control module, is used for confirming that according to the loopback stream mode result of unit controls WMG and rebulids the speaker terminal to the carrying between the hearer terminal with the mode that rebulids the speaker and insert end points.The described the 4th carries control module comprises that the 7th carries control submodule and the 8th carrying control submodule.When described loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, start the 7th and carry the control submodule.The result that described loopback stream mode is confirmed the unit is WMG not during the supporting ring backflow model, starts the 8th and carries the control submodule.The described the 7th carries the control submodule is used to control WMG and sets up the speaker at former context and insert end points, and makes the speaker of foundation insert end points to link to each other with the speaker terminal; The speaker is inserted end points to be inserted end points with the hearer and links to each other; Delete original speaker and insert end points.The described the 8th carries the control submodule is used to control WMG and is comprising that context that the speaker inserts end points sets up new speaker and insert end points, and makes the new speaker of foundation insert end points to link to each other with the speaker terminal; The new speaker who sets up is inserted end points to link to each other with the up connection end point of speaker; Delete original speaker and insert end points.
Described hearer's district reselecting control unit comprises that the hearer terminal moves definite unit, first hearer's district reselecting control sub unit, second hearer's district reselecting control sub unit and the 3rd hearer's district reselecting control sub unit.Described hearer moves at the terminal and confirms that the unit is used for confirming the moving direction at hearer terminal; When the hearer terminal move the result that confirms the unit for the hearer terminal when the sub-district at place, speaker terminal moves to other sub-district, start first hearer's district reselecting control sub unit; When the hearer terminal is moved the result who confirms the unit and moved to the sub-district at place, speaker terminal from other sub-district for the hearer terminal, start second hearer's district reselecting control sub unit; When the hearer terminal move the result that confirms the unit for the hearer terminal from the speaker terminal not the sub-district move to other speaker terminal not the sub-district time, start the 3rd hearer's district reselecting control sub unit.Described first hearer's district reselecting control sub unit, second hearer's district reselecting control sub unit and the 3rd hearer's district reselecting control sub unit all are used for when district reselecting takes place at the hearer terminal, and the control WMG rebulids the speaker terminal to the carrying between the hearer terminal.
Described first hearer's district reselecting control sub unit comprises: the loopback stream mode is confirmed the unit, is used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the 5th and carries control module; The 5th carries control module, is used for confirming that according to the loopback stream mode result of unit controls WMG and rebulids the speaker terminal to the carrying between the hearer terminal with the mode that newly-built hearer inserts end points.The described the 5th carries control module comprises that the 9th carries control submodule and the tenth carrying control submodule.When described loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, start the 9th and carry the control submodule.The result that described loopback stream mode is confirmed the unit is WMG not during the supporting ring backflow model, starts the tenth and carries the control submodule.The described the 9th carries the control submodule is used to control WMG and sets up the hearer at former context and insert end points, and makes the hearer insert end points to link to each other with the hearer terminal.The described the tenth carries the control submodule is used to control WMG and sets up the hearer and insert end points and comprise that the hearer inserts the context of end points, and makes the hearer insert end points to link to each other with the hearer terminal, and the hearer inserts end points and links to each other with the descending connection end point of speaker.
Described second hearer's district reselecting control sub unit comprises: the loopback stream mode is confirmed the unit, is used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the 6th and carries control module; The 6th carries control module, is used for confirming that according to the loopback stream mode result of unit controls WMG and rebulids the speaker terminal to the carrying between the hearer terminal with the mode that the deletion hearer inserts end points.The described the 6th carries control module comprises that the 11 carries control submodule and the 12 carrying control submodule.When described loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, start the 11 and carry the control submodule.The result that described loopback stream mode is confirmed the unit is WMG not during the supporting ring backflow model, starts the 12 and carries the control submodule.The described the 11 carries the control submodule is used to control WMG deletion hearer and inserts end points, the speaker is inserted end points link to each other with the hearer terminal, and the speaker inserts end points and is set to the loopback stream mode.The described the 12 carries the control submodule is used to control WMG and deletes former hearer and insert end points; The descending connection end point of speaker is moved to from hearer's context in speaker's context, the descending connection end point of speaker is inserted end points with the speaker link to each other, the descending connection end point of speaker is inserted to the speaker be set to unidirectional topology between the end points.
Described the 3rd hearer's district reselecting control sub unit comprises: the loopback stream mode is confirmed the unit, is used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the 7th and carries control module; The 7th carries control module, is used for confirming that according to the loopback stream mode result of unit controls WMG and rebulids the speaker terminal to the carrying between the hearer terminal with the mode that rebulids the hearer and insert end points.The described the 7th carries control module comprises that the 13 carries control submodule and the 14 carrying control submodule.When described loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, start the 13 and carry the control submodule.The result that described loopback stream mode is confirmed the unit is WMG not during the supporting ring backflow model, starts the 14 and carries the control submodule.Described the 13 carrying control submodule is used to control WMG and inserts end points the original hearer of former context deletion; Set up new hearer and insert end points; And the new hearer who makes foundation inserts end points and links to each other with the hearer terminal, and new hearer inserts end points and inserts end points with the speaker and link to each other.The described the 14 carries the control submodule is used to control WMG and is comprising that the hearer inserts the context of end points, delete former hearer and insert end points, and a newly-built hearer inserts end points, and the new hearer that will set up inserts end points and links to each other with the hearer terminal.
Shown in figure 41, the fourth embodiment of the present invention also discloses a kind of mobile switching centre, is used to control WMG and sets up, revises, deletes the carrying between speaker terminal and the hearer terminal, and support speaker terminal and hearer's communication between terminals.Described mobile switching centre comprises Mobile Switching Center Server and WMG.Described Mobile Switching Center Server is used to control WMG and sets up the speaker terminal to the carrying (its structure is referring to the description of the 3rd embodiment) between the hearer terminal; Described WMG is used for setting up the speaker terminal under the control of Mobile Switching Center Server to the carrying between the hearer terminal.
Embodiments of the invention are directed against second generation communication system GSM in the evolution process of 3-G (Generation Three mobile communication system) UMTS; After circuit domain core net adopts the framework that calling is controlled with carrying separates; How to realize the secret call service in the trunking communication, specifically described the carrying control flow in the process of setting up, right to speak transfer process, speaker minizone handoff procedure and the hearer's cell reselection process of individual call.
Though described the present invention through embodiment, those of ordinary skills know, under the situation that does not break away from spirit of the present invention and essence, just can make the present invention that many distortion and variation are arranged, and scope of the present invention is limited appended claim.

Claims (18)

1. a method that realizes that secret communication is professional is characterized in that, comprising:
When speaker terminal and hearer terminal are positioned at same sub-district; Set up public access end points and the context that comprises public access end points; Public access end points is linked to each other with the hearer terminal with the speaker terminal respectively, and whether the supporting ring backflow model is set up public access end points loopback according to WMG;
When speaker terminal and hearer terminal were positioned at different districts, whether the supporting ring backflow model was set up the speaker terminal to the carrying between the hearer terminal according to WMG.
2. method according to claim 1 is characterized in that,
When WMG supporting ring backflow model, described whether the supporting ring backflow model is set up public access end points loopback for public access end points is made as the loopback stream mode according to WMG;
When WMG not during the supporting ring backflow model; Described whether the supporting ring backflow model is set up public access end points loopback is according to WMG: in described context, set up up connection end point of speaker and the descending connection end point of speaker; And public connection end point is set to unidirectional topology to the up connection end point of speaker, and the descending connection end point of speaker is set to unidirectional topology to public connection end point; Set up that the speaker is up to act on behalf of that end points and speaker are descending to be acted on behalf of end points and comprise up end points and the descending context of acting on behalf of end points of speaker acted on behalf of of speaker; And the up end points of acting on behalf of of speaker is linked to each other with the up connection end point of speaker, the descending end points of acting on behalf of of speaker links to each other with the descending connection end point of speaker.
3. method according to claim 1 is characterized in that, when speaker terminal and hearer terminal were positioned at different districts, whether the supporting ring backflow model was set up the speaker terminal specifically comprises to the carrying between the hearer terminal according to WMG:
When WMG supporting ring backflow model; Setting up the speaker inserts end points and comprises that the speaker inserts the context of end points; And in said context, set up the hearer and insert end points, and make the speaker insert end points to link to each other with the speaker terminal, make the hearer insert end points and link to each other with the hearer terminal;
When WMG not during the supporting ring backflow model; Setting up the speaker inserts end points, the up connection end point of speaker and comprises that the speaker inserts the context of end points and the up connection end point of speaker; And the speaker is inserted end points link to each other with the speaker terminal, the speaker is inserted end points link to each other with the up connection end point of speaker; Set up the hearer and insert end points, the descending connection end point of speaker and comprise that the hearer inserts the context of end points and the descending connection end point of speaker, the hearer is inserted end points link to each other, the hearer is inserted end points link to each other with the descending connection end point of speaker with the hearer terminal; Set up that the speaker is up to act on behalf of that end points and speaker are descending to be acted on behalf of end points and comprise up end points and the descending context of acting on behalf of end points of speaker acted on behalf of of speaker; And the up end points of acting on behalf of of speaker linked to each other with the up connection end point of speaker, the descending end points of acting on behalf of of speaker links to each other with the descending connection end point of speaker.
4. method according to claim 3 is characterized in that,
When WMG supporting ring backflow model, the speaker inserts end points and inserts end points to the hearer and be set to unidirectional topology; Perhaps the speaker inserts end points and is set to only receive stream mode; And the hearer inserts end points and is set to only send stream mode; The speaker is inserted end points and hearer insert and be set to two-way topology between the end points, and the speaker inserts end points and hearer and inserts end points and use the transmitting-receiving stream mode;
When WMG not during the supporting ring backflow model, the up end points of acting on behalf of of speaker is set to unidirectional topology to the descending end points of acting on behalf of of speaker; Perhaps the up end points of acting on behalf of of speaker is set to only receive stream mode, and the descending end points of acting on behalf of of speaker is set to only send stream mode; Perhaps the speaker inserts end points and is set to unidirectional topology to the up connection end point of speaker; Perhaps the speaker inserts end points and is set to only receive stream mode, and the up connection end point of speaker is set to only send stream mode; Perhaps the descending connection end point of speaker inserts end points to the hearer and is set to unidirectional topology; Perhaps the descending connection end point of speaker is set to only receive stream mode, and the hearer inserts end points and is set to only send stream mode.
5. method according to claim 4 is characterized in that described method also comprises the conversion right to speak, and described conversion right to speak specifically comprises:
Under WMG supporting ring backflow model situation, when the speaker inserted end points and hearer and inserts end points and be provided with the way flow pattern, the speaker inserted end points and is set to only send stream mode, and the hearer inserts end points and is set to only receive stream mode; Insert when being provided with unidirectional topology between the end points when the speaker inserts end points and hearer, the speaker is inserted end points and hearer insert between the end points topology and be inverted;
At WMG not under the supporting ring backflow model situation; When the speaker inserts that end points and the up connection end point of speaker, speaker are up to act on behalf of that end points and speaker are descending to be acted on behalf of end points, the descending connection end point of speaker and hearer and insert that one of them is provided with unidirectional topology between the end points; The hearer is inserted end points to be moved into and to comprise that the speaker inserts in the context of end points; And the hearer is inserted end points link to each other with the up access end points of speaker; The speaker is inserted end points be moved into and comprise that the hearer inserts in the context of end points, the descending access end points of speaker is inserted end points with the speaker link to each other.
6. method according to claim 2 is characterized in that, when the speaker terminal when the sub-district at hearer terminal place moves to other sub-district, described method comprises that also carrying out the speaker minizone switches, the described speaker minizone of carrying out is switched and is specifically comprised:
When WMG supporting ring backflow model, in described context, set up the speaker and insert end points, and make the speaker insert end points to link to each other with the speaker terminal; The speaker inserts end points and inserts end points with the hearer and link to each other;
When WMG not during the supporting ring backflow model; Setting up the speaker inserts end points and comprises that the speaker inserts the context of end points; And make the speaker insert end points to link to each other with the speaker terminal; The up connection end point of speaker is moved to the described speaker of comprising insert in the context of end points from former context, and the speaker is inserted end points link to each other with the up connection end point of speaker.
7. method according to claim 3 is characterized in that, when the speaker terminal moved to the sub-district at hearer terminal place from other sub-district, described method comprised that also carrying out the speaker minizone switches, and the described speaker minizone of carrying out is switched and specifically comprised:
When WMG supporting ring backflow model, the deletion speaker inserts end points, the hearer is inserted end points link to each other with the speaker terminal, and the hearer inserts end points and is set to the loopback stream mode;
When WMG not during the supporting ring backflow model, the deletion speaker inserts end points, and the up connection end point of speaker is moved to from speaker's context in hearer's context, inserts end points with the hearer and links to each other, and makes the hearer insert end points and links to each other with the speaker terminal.
8. method according to claim 3; It is characterized in that; When the speaker terminal from the hearer terminal not the sub-district move to other hearer terminal not the sub-district time, described method comprises that also carrying out the speaker minizone switches, the described speaker minizone of carrying out is switched and is specifically comprised:
When WMG supporting ring backflow model, in described context, set up new speaker and insert end points, and make the new speaker of foundation insert end points to link to each other with the speaker terminal; New speaker is inserted end points to be inserted end points with the hearer and links to each other; Delete original speaker and insert end points;
When WMG not during the supporting ring backflow model, set up new speaker in the context of end points and insert end points comprising that the speaker inserts, and make the new speaker of foundation insert end points to link to each other with the speaker terminal; The new speaker who sets up is inserted end points to link to each other with the up connection end point of speaker; Delete original speaker and insert end points.
9. method according to claim 3 is characterized in that, when the hearer terminal moved to the sub-district at place, speaker terminal from other sub-district, described method also comprises carried out hearer's district reselecting, and the described hearer's district reselecting of carrying out specifically comprises:
When WMG supporting ring backflow model, the deletion hearer inserts end points, the speaker is inserted end points link to each other with the hearer terminal, and the speaker inserts end points and is set to the loopback stream mode;
When WMG not during the supporting ring backflow model, delete former hearer and insert end points; The descending connection end point of speaker is moved to from hearer's context in speaker's context, the descending connection end point of speaker is inserted end points with the speaker link to each other, the descending connection end point of speaker is inserted to the speaker be set to unidirectional topology between the end points.
10. method according to claim 3; It is characterized in that; When the hearer terminal from the speaker terminal not the sub-district move to other speaker terminal not the sub-district time, described method also comprises carries out hearer's district reselecting, the described hearer's district reselecting of carrying out specifically comprises:
When WMG supporting ring backflow model; In described context, delete original hearer and insert end points, set up new hearer and insert end points; And the new hearer who makes foundation inserts end points and links to each other with the hearer terminal, and new hearer inserts end points and inserts end points with the speaker and link to each other;
When WMG not during the supporting ring backflow model, comprising that the hearer inserts in the context of end points, delete former hearer and insert end points, and a newly-built hearer inserts end points, and the new hearer that will set up inserts end points and links to each other with the hearer terminal.
11. method according to claim 2 is characterized in that, when the hearer terminal when the sub-district at speaker terminal place moves to other sub-district, described method also comprises carries out hearer's district reselecting, the described hearer's district reselecting of carrying out specifically comprises:
When WMG supporting ring backflow model, in described context, set up the hearer and insert end points, and make the hearer insert end points to link to each other with the hearer terminal;
When WMG not during the supporting ring backflow model, set up the hearer and insert end points and comprise that the hearer inserts the context of end points, and make the hearer insert end points to link to each other with the hearer terminal, the hearer inserts end points and links to each other with the descending connection end point of speaker.
12. a Mobile Switching Center Server is characterized in that, comprising:
Judging unit is used to judge whether speaker terminal and hearer terminal are positioned at same sub-district, and judged result is issued the carrying control unit;
Carry control unit, be used for whether supporting ring backflow model control WMG is set up the speaker terminal to the carrying between the hearer terminal according to the result of judging unit and WMG;
Wherein, described carrying control unit comprises that also first carries control sub unit and second and carry control sub unit, when the result of judging unit is positioned at same sub-district for speaker terminal and hearer terminal, starts the first carrying control sub unit; When the result of judging unit is positioned at different districts for speaker terminal and hearer terminal, start the second carrying control sub unit;
Described first carries control sub unit is used to control the context that WMG is set up public access end points and comprised public access end points; Public access end points is linked to each other with the hearer terminal with the speaker terminal respectively, and whether the supporting ring backflow model is set up public access end points loopback according to WMG;
Described second carries control sub unit is used for whether supporting ring backflow model control WMG is set up the speaker terminal to the carrying between the hearer terminal according to WMG.
13. Mobile Switching Center Server according to claim 12 is characterized in that, described first carries control sub unit comprises:
Access control unit, terminal is used to control WMG and sets up public access end points and the context that comprises public access end points, and public access end points is linked to each other with the hearer terminal with the speaker terminal respectively;
The loopback stream mode is confirmed the unit, be used for confirming whether supporting ring backflow model of WMG, and the result that will confirm issues the loopback control unit;
The loopback control unit is used for confirming that according to the loopback stream mode result of unit controls WMG and sets up public access end points loopback.
14. Mobile Switching Center Server according to claim 13; It is characterized in that; Described loopback control unit comprises the first loopback control sub unit and the second loopback control sub unit; When the loopback stream mode confirms that the result of unit is WMG supporting ring backflow model, start the first loopback control sub unit; The result who confirms the unit when the loopback stream mode is WMG not during the supporting ring backflow model, starts the second loopback control sub unit;
The described first loopback control sub unit is used to control WMG public access end points is made as the loopback stream mode;
The described second loopback control sub unit; Be used for controlling WMG and set up up connection end point of speaker and the descending connection end point of speaker at described context; And public connection end point is set to unidirectional topology to the up connection end point of speaker, and the descending connection end point of speaker is set to unidirectional topology to public connection end point; Set up that the speaker is up to act on behalf of that end points and speaker are descending to be acted on behalf of end points and comprise up end points and the descending context of acting on behalf of end points of speaker acted on behalf of of speaker; And the up end points of acting on behalf of of speaker is linked to each other with the up connection end point of speaker, the descending end points of acting on behalf of of speaker links to each other with the descending connection end point of speaker.
15. Mobile Switching Center Server according to claim 12 is characterized in that, described second carries control sub unit comprises that first carries the control module and the second carrying control module; When WMG supporting ring backflow model, start first and carry control module, when WMG not during the supporting ring backflow model, start second and carry control module;
The described first carrying control module is used to set up the speaker and inserts end points and comprise that the speaker inserts the context of end points; And in said context, set up the hearer and insert end points; And make the speaker insert end points to link to each other with the speaker terminal, make the hearer insert end points and link to each other with the hearer terminal;
The described second carrying control module is used to set up the speaker and inserts end points, the up connection end point of speaker and comprise that the speaker inserts the context of end points and the up connection end point of speaker; And the speaker is inserted end points link to each other with the speaker terminal, the speaker is inserted end points link to each other with the up connection end point of speaker; Set up the hearer and insert end points, the descending connection end point of speaker and comprise that the hearer inserts the context of end points and the descending connection end point of speaker, the hearer is inserted end points link to each other, the hearer is inserted end points link to each other with the descending connection end point of speaker with the hearer terminal; Set up that the speaker is up to act on behalf of that end points and speaker are descending to be acted on behalf of end points and comprise up end points and the descending context of acting on behalf of end points of speaker acted on behalf of of speaker; And the up end points of acting on behalf of of speaker linked to each other with the up connection end point of speaker, the descending end points of acting on behalf of of speaker links to each other with the descending connection end point of speaker.
16. Mobile Switching Center Server according to claim 12; It is characterized in that; Described Mobile Switching Center Server also comprises: the right to speak TCU transfer control unit is used for whether whether supporting ring backflow model, speaker terminal and hearer terminal are positioned at same sub-district control WMG and change right to speak according to WMG.
17. Mobile Switching Center Server according to claim 12; It is characterized in that; Described Mobile Switching Center Server also comprises: speaker minizone switch control unit is used for whether whether supporting ring backflow model, speaker terminal and hearer terminal are positioned at same sub-district control WMG and carry out the speaker minizone and switch according to WMG.
18. Mobile Switching Center Server according to claim 12; It is characterized in that; Described Mobile Switching Center Server also comprises: hearer's district reselecting control unit is used for whether whether supporting ring backflow model, speaker terminal and hearer terminal are positioned at same sub-district control WMG and carry out hearer's district reselecting according to WMG.
CN2006101500344A 2006-10-24 2006-10-24 A method for realizing private key call service and mobile switching center Active CN101170750B (en)

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CN2006101500344A CN101170750B (en) 2006-10-24 2006-10-24 A method for realizing private key call service and mobile switching center

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Application Number Priority Date Filing Date Title
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