CN100461901C - Method for realizing CDMA traditional packet digital calling talk process - Google Patents
Method for realizing CDMA traditional packet digital calling talk process Download PDFInfo
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Abstract
The method comprises: in the process of establishing a group call, building the STDL between PDS and BSC in cluster scheduling area; building shared forward service channel and shared backward service channel on the BTS under said BSC; in session state, the terminal getting speak rights sends voice and signaling to BSS through the shared backward channel, and BSS transmits the voice and signaling to the PDS through STDL of current call; PDS sends the voice and signaling to relevant BSSs through STDL established by current call; the relevant BSS sends the voice and signaling on its shared forward service channel; the terminal receives the voice and signaling on said shared forward channel.
Description
Technical field
The present invention relates to digital cluster system, the particularly a kind of control of the digital cluster system calling talk process in the CDMA standard and the method for channel resource allocation.
Background technology
Mobile communication technology has developed into the third generation, and wherein trunking communication becomes a kind of indispensable communication traffic day by day.Trunking communication is meant a kind of dispatching communication mode of special use, comprises special-purpose commander and dispatching communication, and in use cluster user can add calling simultaneously, and conversation is carried out with single worker or half-duplex mode.
Trunking communication has been experienced simple intercom system to single base station mini system, arrive the development course of big capacity multizone system again, after experienced again from the simulation cluster to the leap of Digital Clustering, make trunking communication all can adopt more reliable digital processing mode at the aspects such as multi-access mode, speech coding, modulation-demodulation technique, simultaneous techniques, error-detection error-correction and diversity technique of signalling coding, employing.Two kinds of digital cluster systems of extensive use at present are based on TDMA (Time Division Multiple Access, time division multiple access) iDEN of technology (integrated Digital Enhanced Network, Integrated Digital Enhanced Network) and TETRA (Terrestrial Trunked Radio, land trunked radio), these system applies all belong to special-purpose cluster in specific department and unit, for promoting the sizable application of digital cluster system, further boost the efficiency of frequency resources utilization simultaneously, trunked communication system a new application trend occurred on using, the unification that exactly a plurality of digital cluster systems combined is used and is managed, thereby be able to share channel and channel, share the overlay area, communication service, carry on a shoulder pole the purpose of expense altogether, cluster application realizes the common network operation from developing into towards indivedual professional users towards a plurality of group users the most at last.
Call out in group system and be limited in certain territorial scope usually, if colony terminal exceeds this limited field, system will not provide trunked call service, and this limited field is called dispatcher-controlled territory.Can be according to the actual needs of the network planning, the overlay network of system is divided into some dispatch location area (Dispatch Location Area, DLA), dispatch location area can be whole network, it also can be the part of network, with the cellular cell in the wireless communication field is least unit, the designated dispatch service of trunked call zone (Dispatch Service Area, DSA), the dispatch service zone is the set of dispatch location area, when trunked call exceeded the dispatch service zone of system's appointment, system just no longer provided service for it.
Trunking communication has promoted existing GSM (Global System forMobile Communications by private network to the development of common network, global system for mobile communications), realize the research of Clustering on CDMA (Code Division MultipleAccess, the code division multiple access) network.
Application number is the control method that discloses a kind of CDMA2000 digital cluster system calling procedure in the Chinese patent application of CN200410027538, and its calling procedure comprises: (1) terminal sends call setup request message, requires to activate group; (2) system handles the setup requests of terminal; (3) group enters talking state, and promptly group activates, and perhaps access success is set up, and the terminal of successful paging this moment can be applied for right to speak; (4) demanding terminal finishes conversation, sends the end of conversation request, requires system to discharge all resources of this calling, and putting group is non-activation; (5) system handles the end of conversation request.
This method is when carrying out trunked call, for each cluster user terminal is distributed air traffic channel separately, user terminal is by the paging mode by existing CDMA2000 1X normal voice calls, promptly press IMSI (International Mobile Subscriber Identity, international travelling carriage identification code) paging, and what be that the terminal distribution channel also adopts when terminal insert to be called out is the channel allocation mode of normal voice calls, this like this trunked call even can break through geological restraint to realize roaming in the mode of independent allocated channel, show differently, be referred to as the enhanced group calling in the literary composition with existing professional trunked call.
By this group calling mode, its channel resource of eating dishes without rice or wine takies relevant with the group user number, if number of users is N, then channel uses number to be 2N+1, be the taking with the number of users linear growth of interface-free resources, the channel resource of base station side is limited, in the place that a large amount of group user are concentrated, as megaevent, the group calling mode of this enhanced can't meet the demands.
In addition, the call of this enhanced group calling comprises end side, base station side, and network side three parts's detailed process is that the calling procedure of each terminal is controlled when wherein calling out control.What also adopt for the terminal distribution channel is the allocated channel mode of normal voice calls, and this like this mode just must need this terminal to be subjected to the control of mobile switching centre, has increased the Signalling exchange with the irrelevant network element of cluster.
Summary of the invention
The technical problem to be solved in the present invention is the implementation method that proposes a kind of CDMA Digital Clustering calling talk process, can satisfy the needs that a large number of users is conversed simultaneously.
In order to solve the problems of the technologies described above, the invention provides a kind of implementation method of CDMA Digital Clustering calling talk process, be applied to the digital cluster system of CDMA standard, this method may further comprise the steps:
(a) in group call establishment process, the cluster data link is shared in the special use of setting up between the base station sub-system in dispatch server and the group scheduling coverage, and set up on all transceivers in these base station sub-systems and share forward traffic channel and shared reverse traffic channel, enter talking state, wherein, the shared forward traffic channel of setting up under a base station transceiver comprises a shared Forward Fundamental Channel and a shared forward direction supplementary service channel, base station sub-system sends voice by this Forward Fundamental Channel to end side, perhaps voice add signaling, send signaling by this shared forward direction supplementary service channel to end side;
(b) in the communication process, the terminal that obtains right of speech sends voice and signaling by the shared reverse traffic channel of timesharing to base station sub-system, and base station sub-system is shared the cluster data link by the special use of this calling described voice and signaling are transferred to dispatch server;
(c) dispatch server has been set up the special-purpose cluster data link of sharing by all of this calling voice and signaling has been sent to the relevant base station subsystem, shared forward traffic channel by the transceiver correspondence of described base station sub-system sends described voice and signaling, and terminal receives described voice and signaling on described shared forward traffic channel.
Further, above-mentioned implementation method also can have following characteristics:, in the described step (a), the shared reverse traffic channel of setting up under a base station transceiver comprises that at least two are shared reverse fundamental service channel, in the communication process, the terminal that obtains right of speech is monopolized the shared reverse fundamental service channel of a timesharing to base station sub-system transmission backward signaling and voice, and all do not have this group terminal of right of speech to use one or more reverse fundamental service channels of sharing simultaneously to send backward signaling.
Further, above-mentioned implementation method also can have following characteristics: in the communication process, the terminal that obtains right of speech sends described voice to base station sub-system by the shared reverse traffic channel of the timesharing of monopolizing with voice, base station sub-system is shared the Digital Clustering data link through special use and is sent to dispatch server, dispatch server is transmitted described voice to all base station sub-systems of having set up the shared Digital Clustering data link of this call-specific, these base station sub-systems send described voice by sharing Forward Fundamental Channel again, are sharing reception voluntarily on the Forward Fundamental Channel by terminal.
Further, above-mentioned implementation method also can have following characteristics: finish the application of right of speech in the communication process by following steps:
(h) user passes through the terminal to transmit call application signaling of holding, and this application signaling sends to base station sub-system by the reverse fundamental service channel of sharing simultaneously, shares the Digital Clustering data link through special use again and sends to dispatch server;
(i) after dispatch server is received this application signaling, the information that obtains from dispatching home location register during according to call setup judges whether it has the authority of speaking, if this terminal has the authority of speaking and in the terminal of application right of speech its priority the highest, then share the base station sub-system of Digital Clustering data link and send the mandate indication of speaking to this terminal place through special use, by sending this indication on the shared forward direction supplementary service channel of the transceiver correspondence of described base station sub-system, this terminal receives this indication on this channel;
(j) after this terminal is received the mandate indication of speaking, send right of speech to the place base station sub-system and confirm signaling on the reverse fundamental service channel that the timesharing of monopolizing is shared, this base station sub-system is shared the Digital Clustering data link by special use this signaling is sent to dispatch server.
Further, above-mentioned implementation method also can have following characteristics: also comprise step (k) after the described step (j): after dispatch server receives that this right of speech is confirmed, all non-users of speaking send " having the user to speak " prompting in calling out, this prompting sends to all earlier and dispatch server has been set up the base station sub-system that the Digital Clustering data link is shared in the special use of this time calling out, send on the shared forward direction supplementary service channel by the transceiver correspondence of described base station sub-system, terminal receives this prompting voluntarily on this channel.
Further, above-mentioned implementation method also can have following characteristics: finish the release of right of speech in the communication process by following steps:
When (o) user who has a right of speech wants to abandon right of speech, operating terminal sends to dispatch server and discharges the right to apply for words signaling, the reverse fundamental service channel that this release application signaling is shared by its timesharing of having monopolized sends to base station sub-system, share the Digital Clustering data link through special use again and send to dispatch server, this terminal withdraws from its backward channel of monopolizing then;
When (p) dispatch server is received this release application, then share the base station sub-system of Digital Clustering data link and send right of speech release affirmation signaling to this terminal place through special use, by sending this signaling on the shared forward direction supplementary service channel of the transceiver correspondence of described base station sub-system, this terminal receives this signaling on this channel.
Further, above-mentioned implementation method also can have following characteristics: also comprise step (q) after the described step (p): dispatch server all users' transmission " no user is spoken " promptings in calling out again, this prompting sends to all earlier and dispatch server has been set up the base station sub-system that the Digital Clustering data link is shared in the special use of this time calling out, send on the shared forward direction supplementary service channel by the transceiver correspondence of described base station sub-system, terminal receives this prompting voluntarily on this channel.
Further, above-mentioned implementation method also can have following characteristics: described step (a) is when entering talking state, and dispatch server has been authorized right of speech acquiescently and exhaled terminal.
As from the foregoing, the inventive method is to adopt the Channel Sharing mode of traditional group call on the mode of channel resource allocation, make the digital cluster system of number of users in original limited and the sub-district to become not limited systems of single group user number, greatly improved the power system capacity of trunking communication.Further,, reduced the system congestion probability of trunking communication, can hold a large number of users simultaneously and insert by reasonable distribution to channel resource.
Description of drawings
Fig. 1 is the network structure of embodiment of the invention method.
Fig. 2 is the flow chart that end message upgrades in the embodiment of the invention method.
Fig. 3 is the flow chart of call setup in the embodiment of the invention method.
Fig. 4 is the flow chart of member's conversation in the embodiment of the invention method.
Fig. 5 calls out the flow chart that discharges in the embodiment of the invention method.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is further introduced, but not as sufficient to limit of the present invention.
With reference to shown in Figure 1, be the network structure of support CDMA traditional packet digital calling control method of the present invention, its chief component is described below earlier:
MS: colony terminal, also abbreviate terminal in the literary composition as, can support storing subscriber information, group information, dispatcher-controlled territory are judged, the terminal equipment of group services such as response traditional group call paging.
BSS: base station sub-system, comprise the transceiver (BTS) of supporting trunked call, base station controller (BSC) and with the mutual dispatching client (PDC) of network side;
PDS: dispatch server, realize the calling control and the right of speech management of trunked call;
PHR: dispatching home location register, the log-on message and the positional information of preservation cluster user and group realize authentication, mandate and billing function to cluster user, and the position is upgraded and group management function.
In the literary composition, PDS and PHR are referred to as network side or dispatching patcher.System side has then comprised base station sub-system and dispatching patcher.
In order to realize limitless volumes and insert fast that the present invention adopts the resource distribution mode of sharing wireless channel.A kind of trunking communication method of CDMA2000 mobile communcations system in being the PCT international application of WO2004/110085 A1, publication number is disclosed, by base station system is public forward traffic channel of same group allocation under same sub-district, group's terminal uses public Long Code Mask to monitor public forward traffic channel, is oppositely adopting a shared service channel to provide the reverse traffic support by the mode of scheduling for group's terminal.It is to set up forward direction and reversed shared channel between terminal and the base station that this patent emphasis has been illustrated in wireless side, capture terminal forward direction shared service channel inserts the mode of calling out, but in fact this resource allocation methods also is difficult to use (hereinafter can discuss to this) in the reality conversation, and this patent application does not relate to end side, base station side and the network side control mode in group-calling process yet in addition.For example, between base station side and end side, set up what forward directions and reverse shared service channel, how to realize the mutual of signaling and voice between network side and the terminal, or the like.
For being different from the enhanced group calling mode of existing CDMA mode cluster system, in the literary composition method of calling of the present invention is called traditional group call.Before the implementation method of introducing traditional group call communication process of the present invention, introduce relevant end message renewal process and call establishment earlier.
The end message renewal process
In order to improve the access speed of system, realize that terminal is according to functions such as group identification (GID) response paging and the limited callings of realization dispatcher-controlled territory in the group calling, the content that needs on the terminal to write down in the informational needs and PHR on record corresponding information and the terminal is consistent, PHR increases, deletes and revises after the information of terminal correspondence, need carry out corresponding renewal to end message, or be referred to as information synchronization.
Present embodiment end message renewal process may further comprise the steps as shown in Figure 2:
Step 201:MS initiates the position register request of group service;
Carrying out information updating needs terminal to be under the idle condition, and PDS operates after the PTT business state is advanced in its paging again.If (service condition comprises: common CDMA1X speech business to be in service condition based on the terminal of CDMA2000 technology, data service, PTT (Push-To-Talk) business), it will be very slow sending than the message of large information capacity on control channel, thereby it is long to cause taking resource, if will cause mixing of function, influence the release of basic call and utilize terminal existing business channel to send lastest imformation.If because can carry out location registers then inevitable not under service condition based on the terminal of CDMA technology, present embodiment is initiated the starting point of location registers as the end message renewal process to terminal.
Step 202:PHR upgrades registration through PDS to the MS home position and accepts message;
This message informing MS registers successfully this, corresponding icon can be arranged as successfully showing on terminal interface.
Step 203:PHR judges that the information change sign of this MS has or not set, if set illustrates that then this MS needs information updating, sends the end message update notification of this MS to PDS;
The information change sign of this MS whether set comes from this MS that PHR stores and needs updated information to have or not change, has been modified if relate to the information of this MS, then this flag set.
Step 204: after server PDS receives the end message update notification of PHR,, then this user is initiated paging if this MS is in idle condition;
The paging here is the enhanced paging, because this only upgrades at this user.
Step 205:MS returns to system and pages reply, and the BSS system sets up Traffic Channel for it, and the foundation of notice PDS Traffic Channel is finished;
System also is an enhanced for the Traffic Channel that this MS sets up, and is only monopolized by this MS.
After step 206:PDS learns that the Traffic Channel foundation that is updated the user is finished, to PHR request lastest imformation;
Step 207:PHR returns the end message that needs this MS to revise to PDS;
End message is divided into user profile and group information, and wherein user profile mainly is the dispatcher-controlled territory under this MS, interruption-free, MDN (Mobile Directory Number, Mobile Directory Number) information etc., group information mainly are the GID of group, GMDN (Group MDN, the group Mobile Directory Number), group name, member's priority, group scheduling zone etc., user profile and group information content are separate, can upgrade respectively.
Step 208:PDS sends the end message update inquiry information to MS, carries the end message that needs modification;
Step 209:MS is according to the requirement in the end message update inquiry information, and carrying out increases accordingly, after the modification, deletion action, returns end message to PDS and upgrade response message, and carry the result of renewal;
After step 210:PDS received that end message that MS returns upgrades response message, notice PHR end message upgrades to be finished;
Step 211:PDS sends release message to MS;
Step 212:MS returns and discharges response to BSS transmission Release complete;
After step 213:BSS receives the Release complete of terminal, discharge the wireless side resource and return Release complete, finish end message and upgrade to PDS.
At some in particular cases, for example, when dynamically recombinating, end message need upgrade in time during the individual user in the deletion group.The trigger point of this renewal judges and when this MS is not in service condition this user is initiated paging that execution in step 205 then after can knowing corresponding change by PDS, subsequent step is identical with above-mentioned flow process.
Call establishment
Before MS called out, BSS sent Overhead Message to MS always, and for the MS that supports traditional group call, base station side need send Overhead Message, and MS receives this message and just calculates capture systems, will be with dispatch location area information (DLA) in the Overhead Message.MS is provided with a service identifiers for each group, after receiving Overhead Message, the dispatch service zone (DSA) that each group in the group information of DLA in the message and the storage of this machine is supported is compared, if the present residing DLA of MS belongs to the DSA of certain group, then the service identifiers with this group is changed to " can serve ".
Call establishment in the present embodiment method as shown in Figure 3, wherein the reciprocal process of network side and base station side may further comprise the steps:
Step 301: work the person of exhaling and select certain to support this terminal to dispatch the group in district (promptly being designated the group of " can serve ") at present to make a call, rise and exhale terminal to send to call for to ask to BSS;
Above-mentioned traditional type and enhanced resource distribution mode are transparent for the user, because these two kinds of callings are actually the different resource distribution mode of system side, the user need not to know such difference, so, the operation of user on terminal, it is identical working the mode of exhaling.Certainly, owing to will use this terminal current scheduling band of position thereafter, so will have its current scheduling lane place thresholding in the signaling rising to exhale.
If the user has selected not support this terminal to dispatch the group in district at present, can point out error message by end side, perhaps to attempt inserting, network side also can be made judgement to this.
Step 302: work to call for to ask through BSS sending to PDS, PDS request PHR carries out authentication, and receives authenticating result;
Calling mainly is to judge that this terminal has had or not call right in the authentication of PHR, will not rise in the group of exhaling at it.If when having two kinds of groups of traditional type and enhanced attribute simultaneously, when PDS returns authenticating result, also will be with the attribute notice PDS of paging group of institute.
After step 303:PDS receives the authenticating result that PHR returns, if working what exhale is the traditional type group, whether the scheduling district that then continues to judge this present place of terminal is in the dispatch service zone of the group that authentication is returned, if, then PDS can call out this group, send the traditional group call paging request of band caller information to the BSC that works the person of exhaling place, exhale BSC to send not traditional group call paging request with caller information to all in this group scheduling service area non-;
If deployment position district, the present place of terminal is not in the dispatch service zone of the group that authentication is returned, then refusal is called out.But in another embodiment,, also can promptly provide scheduling to distinguish not restricted function for it provides service if system has merged the function of enhanced group calling.
Here so-called " traditional type " group calling paging request (band GID) only is meant that indicating this time calling in the paging request is traditional group call, and BSC will set up wireless channel by the resource distribution mode of traditional group call.Wherein with caller information be not with the difference of the paging request of caller information, the paging request of band caller information has had the traditional group call of exhaling terminal information, BSC to receive the band caller information and also notified the reverse fundamental service channel of exhaling terminal can use timesharing to share except the shared channel of setting up traditional type.
After step 304:BSC receives the group calling paging of PDS transmission, set up this call-specific to the PDS request on the one hand and share cluster data link (STDL), PDS has responded the STDL link setup request of exhaling BSC, sets up the special use of this calling and shares the cluster data link;
Sharing the cluster data link is the carrying that voice are transmitted in the CDMA mode cluster system, and its life cycle is identical with current calling, and just this STDL finishes just can be released in group calling.If the situation of unusual release is arranged, base station side and network side can be monitored at any time, rebuild.
On the other hand, BSC notifies its following all BTS to set up radio channel resource, comprise 1 Forward Fundamental Channel, 1 forward direction supplementary service channel and 2 reverse fundamental service channels, after BTS wireless channel under the BSC is set up successfully, finish message informing PDS by foundation, simultaneously, on paging channel periodically broadcast transmission with the group calling beep-page message of GID addressing;
MS paging receiving message, judge be the traditional group call paging after, mate according to the GID in the GID in the paging and the institute's storage sets information, if the match is successful, then according to the Forward Fundamental Channel of having set up for this group in the information capture affiliated areas such as Long Code Mask in the call signaling, forward direction supplementary service channel, automatically in the access group, need not return enhanced to BSS and insert response signaling;
That is, BSS need not manage called whether the access as long as send the beep-page message (being broadcast channel assigned message) of traditional group call on paging channel.
Step 305:PDS received and exhaled the foundation of BSC to finish message, and the call setup success enters talking state, and PDS notice PHR begins to charge.
Needed only and exhaled BSC to finish the foundation of wireless channel and STDL, just can think to call out and set up, because under this BSC, promptly may exist a plurality of group user will be as called.
By above process, set up shared forward traffic channel and shared reverse traffic channel between BSS and the end side, and the cluster data link is shared in the special use between BSS and the PDS.And how to use these channels to transmit signaling and voice, and how communication process is controlled, just can effectively utilize these resources, the realization a large number of users is conversed simultaneously, is only the problem that the present invention is concerned about.
At present embodiment, BSS utilizes the Forward Fundamental Channel of setting up to send voice, utilizes forward direction supplementary service channel to send signaling.Voice and signaling are separately sent, cause the signaling conflict in the time of can avoiding sending a large amount of speech data, cause communication failure.But in another embodiment, BSS according to the speech data flow also can by fundamental service channel when terminal sends voice, the signaling that will the send to terminal transmission that is packaged together.
Oppositely, one does not have this group terminal of right of speech to share simultaneously by under the BTS all in communication process in two reverse fundamental service channels, to send backward signaling, as the right to apply for words signaling.Another is that timesharing is shared, and is temporarily monopolized by the terminal that obtains right of speech, with voice and the backward signaling that sends this terminal.So just can avoid when sending a large amount of speech datas, causing the signaling conflict on the same channel.In another embodiment, can set up more oppositely fundamental service channel calls out to admit more terminal to insert.
Exhale terminal for rising, can be when group calling is just set up without the right to apply for words, PDS sets up the back in group calling and authorizes it right to speak acquiescently according to PTT (Push To Talk)-PoC principle.System sends to this user's voice and inserts each terminal of calling out then.In the present embodiment, the transmission of voice is finished in the following manner in the communication process:
Step 1: after conversation is set up, obtain right of speech exhale terminal to monopolize the shared reverse fundamental service channel of a timesharing to send backward signaling and voice;
Step 2: after voice sent to BSS, BSS shared the Digital Clustering data link by special use and sends to PDS;
Step 3, this PDS shares all BSS forwardings of Digital Clustering data link to having set up the special use of this time calling out, and BSS sends to terminal by the shared Forward Fundamental Channel under it;
Particularly, PDS transmits to BSC earlier, and BSC has set up this BTS that calls out shared channel resources distribution voice to all again, sends voice by BTS by sharing Forward Fundamental Channel.
Step 4, terminal are shared on the fundamental service channel at forward direction and are received these voice voluntarily.
In the communication process, right of speech can discharge and apply for that the right to apply for words person is obtaining conversation power through end side, base station side, the tripartite mutual back of network side.Suppose that MS_A is the terminal that the party A-subscriber held, it applies in communication process and has temporarily obtained conversation power that on behalf of all, MS_B temporarily do not have the terminal of right of speech.As shown in Figure 4, present embodiment is realized said process by following steps:
After step 402:PDS receives this application signaling, the information that obtains from PHR during according to call setup judges whether it has the authority of speaking, if this terminal has the authority of speaking and in the terminal of application right of speech its priority the highest, PDS sends to speak to MS_A and authorizes indication, this indication is after STDL sends to MS_A place BSS, sent on the shared forward direction supplementary service channel down at it by this BSS, MS_A receives this signaling voluntarily on this channel;
Need to prove, member's conversation is subjected to the restriction of talking state machine, the essence of talking state machine is the queuing mechanism that carries out according to right of speech priority in user's group, if a plurality of terminal to apply rights to speak is arranged then right to speak is authorized the highest terminal of right of speech priority of prior setting, usually caller is come the foremost, and in time authorizes right of speech to it.
Step 403:MS_A confirms that to the PDS return authorization at this moment, MS_A has monopolized a reverse fundamental service channel that timesharing is shared, and then still transmits by the shared Digital Clustering data link of special use between BSS and network side;
After step 404:PDS receives that the right of speech of MS_A is confirmed, all non-users of speaking send " having the user to speak " prompting in calling out, this prompting will send to the BSS that has set up the STDL that this time calls out between all and PDS by GID in traditional group call, sent on the shared forward direction supplementary service channel under it by BSS, terminal receives this prompting voluntarily on this channel;
User A speaks voice in the process and signaling load mode above mentioning rising in the description of exhaling terminal by MS_A, no longer repeats here;
Step 405: when user A wanted to discharge right of speech, operation MS_A sent to PDS and discharges the right to apply for words signaling, and the signaling transfer path is identical with the signaling of application right of speech, withdraws from the backward channel that it is monopolized then;
Step 406:PDS discharges to MS reply power and confirms signaling, and this signaling is identical with mandate indication signaling transfer path;
Step 407:PDS all users in calling out send " no user is spoken " prompting, and this signaling is identical with the transfer path of " having the user to speak " prompting signaling.
By above-mentioned steps as seen, in communication process, network controls be base station sub-system (BSS), the point-to-point PPP that need not to set up through terminal connects, thereby also reduced the connect hours, the shared fully limitless volumes that has realized terminal in this system again of while channel.Therefore can satisfy the requirement that a large number of users is conversed simultaneously.
Need to prove that application and release right of speech process are not necessary in once conversing.
Introduce the end of calling process below again
Call out discharging may be by initiating in many ways, and the promoter can be divided into end side, base station side and network side, is released to example with what terminal was initiated here.Suppose that MS_A is held terminal by the party A-subscriber and initiate release in communication process, on behalf of all, MS_B temporarily do not have the terminal of right of speech.As shown in Figure 5, the end of calling process may further comprise the steps:
Step 501: when user A thought terminating group, operation MS_A sent call release request, is forwarded to PDS through BSS;
After step 502:PDS received this release request, if this user has the group calling of release authority, then all BSC transmission callings were released order in this is called out;
Enhanced finishes signaling and is actually and issues terminal in each group, and the traditional group call network controls is base station rather than terminal, like this this to release order actual be to notify base station side and need not be equally notify each member in the group with enhanced, also no longer distinguished during release and exhaled BSC and non-to exhale BSC.
After step 503:BSC receives that the calling of PDS is released order, notify its down all BTS send this call termination notification at forward direction supplementary service channel, discharge interface-free resources, and discharge this call-specific to the PDS application and share cluster data link (STDL);
Call termination notification is that terminal oneself goes to receive to forward direction supplementary service channel.
When BSC discharges interface-free resources, notify its down all BTS cancel forward shared channel into this call distribution, when the forward direction shared channel cancel finish after, do not catch less than the forward shared channel of its sub-district, place then withdraw from service condition automatically if also do not withdraw from the MS_B of this calling.The MS_B that withdraws from this calling can accept other paging after passing through required pilot tone of CDMA and synchronous process more once more.
The STDL of step 504:PDS response BSS discharges request, no longer transmits voice;
Step 505:BSC interface-free resources and STDL link discharge finish after, return Release complete to PDS;
After step 506:PDS receives this Release complete of calling out all BSC, remove the network side resource, this calls out release notice PHR, finishes to charge.
When calling release is initiated by the base station, particularly work as BSC and find that the wireless side of this calling is unusual, then can apply for finishing this traditional group call, PDS receives that the processing after this request is identical with above-mentioned steps 502～506.Calling also is the same when discharging by the dispatching desk of network side or PDS initiation.
Claims (8)
1. the implementation method of a CDMA Digital Clustering calling talk process is applied to the digital cluster system of CDMA standard, it is characterized in that this method may further comprise the steps:
A, in group call establishment process, the cluster data link is shared in the special use of setting up between the base station sub-system in dispatch server and the group scheduling coverage, and set up on all transceivers in these base station sub-systems and share forward traffic channel and shared reverse traffic channel, enter talking state, wherein, the shared forward traffic channel of setting up under a base station transceiver comprises a shared Forward Fundamental Channel and a shared forward direction supplementary service channel, base station sub-system sends voice by this Forward Fundamental Channel to end side, perhaps voice add signaling, send signaling by this shared forward direction supplementary service channel to end side;
In b, the communication process, the terminal that obtains right of speech sends voice and signaling by the shared reverse traffic channel of timesharing to base station sub-system, and base station sub-system is shared the cluster data link by the special use of this calling described voice and signaling are transferred to dispatch server;
C, dispatch server have set up the special-purpose cluster data link of sharing by all of this calling voice and signaling have been sent to the relevant base station subsystem, shared forward traffic channel by the transceiver correspondence of described base station sub-system sends described voice and signaling, and terminal receives described voice and signaling on described shared forward traffic channel.
2. implementation method as claimed in claim 1, it is characterized in that, among the described step a, the shared reverse traffic channel of setting up under a base station transceiver comprises that at least two are shared reverse fundamental service channel, in the communication process, the terminal that obtains right of speech is monopolized the shared reverse fundamental service channel of a timesharing to base station sub-system transmission backward signaling and voice, and all do not have this group terminal of right of speech to use one or more reverse fundamental service channels of sharing simultaneously to send backward signaling.
3. implementation method as claimed in claim 2, it is characterized in that, in the communication process, the terminal that obtains right of speech sends to base station sub-system by the shared reverse traffic channel of the timesharing of monopolizing with voice, base station sub-system is shared the Digital Clustering data link through special use and is sent described voice to dispatch server, dispatch server is transmitted described voice to all base station sub-systems of having set up the shared Digital Clustering data link of this call-specific, these base station sub-systems send described voice by sharing Forward Fundamental Channel again, are sharing reception voluntarily on the Forward Fundamental Channel by terminal.
4. implementation method as claimed in claim 2 is characterized in that, finishes the application of right of speech in the communication process by following steps:
H, user pass through the terminal to transmit call application signaling of holding, and this application signaling sends to base station sub-system by the reverse fundamental service channel of sharing simultaneously, share the Digital Clustering data link through special use again and send to dispatch server;
After i, dispatch server are received this application signaling, the information that obtains from dispatching home location register during according to call setup judges whether it has the authority of speaking, if this terminal has the authority of speaking and in the terminal of application right of speech its priority the highest, then share the base station sub-system of Digital Clustering data link and send the mandate indication of speaking to this terminal place through special use, by sending this indication on the shared forward direction supplementary service channel of the transceiver correspondence of described base station sub-system, this terminal receives this indication on this channel;
After j, this terminal are received the mandate indication of speaking, send right of speech to the place base station sub-system and confirm signaling on the reverse fundamental service channel that the timesharing of monopolizing is shared, this base station sub-system is shared the Digital Clustering data link by special use this signaling is sent to dispatch server.
5. implementation method as claimed in claim 4, it is characterized in that, also comprise step k behind the described step j: after dispatch server receives that this right of speech is confirmed, all non-users of speaking send " having the user to speak " prompting in calling out, this prompting sends to all earlier and dispatch server has been set up the base station sub-system that the Digital Clustering data link is shared in the special use of this time calling out, send on the shared forward direction supplementary service channel by the transceiver correspondence of described base station sub-system, terminal receives this prompting voluntarily on this channel.
6. implementation method as claimed in claim 2 is characterized in that, finishes the release of right of speech in the communication process by following steps:
O, when the user who has a right of speech wants to abandon right of speech, operating terminal sends to dispatch server and discharges the right to apply for words signaling, the reverse fundamental service channel that this release application signaling is shared by its timesharing of having monopolized sends to base station sub-system, share the Digital Clustering data link through special use again and send to dispatch server, this terminal withdraws from its backward channel of monopolizing then;
When p, dispatch server are received this release application, then share the Digital Clustering data link and send right of speech to the base station sub-system at this terminal place and discharge and confirm signaling, send described affirmation signaling to this terminal on the shared forward direction supplementary service channel by the transceiver correspondence of described base station sub-system through special use.
7. implementation method as claimed in claim 6, it is characterized in that, also comprise step q behind the described step p: dispatch server all users' transmission " no user is spoken " promptings in calling out again, this prompting sends to all earlier and dispatch server has been set up the base station sub-system that the Digital Clustering data link is shared in the special use of this time calling out, send on the shared forward direction supplementary service channel by the transceiver correspondence of described base station sub-system, terminal receives this prompting voluntarily on this channel.
8. implementation method as claimed in claim 1 is characterized in that, when described step a entered talking state, dispatch server had been authorized right of speech acquiescently and exhaled terminal.
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