CN100384266C - Service frame distribution method in digital trunking system - Google Patents

Service frame distribution method in digital trunking system Download PDF

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Publication number
CN100384266C
CN100384266C CNB2004100708064A CN200410070806A CN100384266C CN 100384266 C CN100384266 C CN 100384266C CN B2004100708064 A CNB2004100708064 A CN B2004100708064A CN 200410070806 A CN200410070806 A CN 200410070806A CN 100384266 C CN100384266 C CN 100384266C
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sdu
bss
cluster
group
traffic channel
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CN1725880A (en
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罗雄
张军
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB2004100708064A priority Critical patent/CN100384266C/en
Priority to PCT/CN2005/001084 priority patent/WO2006007792A1/en
Priority to RU2007105774/09A priority patent/RU2345504C2/en
Publication of CN1725880A publication Critical patent/CN1725880A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio systems

Abstract

The present invention discloses a method for distributing service frames in digital cluster systems, which has the processing steps that a, a base station system (BSS) distributes the same selection distribution unit (SDU) for each MS in the same cell of a cluster group where a current call user (MS) is to establish forward service channels when establishing a cluster call; b, the BSS sends service frames to each SDU establishing the forward service channels for the cluster group MS when distributing the service frames; then the SDU distributes the service frames to the forward service channels established by the SDU. The method of the present invention can align the service frames distributed on the forward service channels of the same cluster group in the same cell, and can save large numbers of SDU processing resources.

Description

Service frame distribution method in a kind of digital cluster system
Technical field
The present invention relates to a kind of traffic frame distribution technology, the service frame distribution method in particularly a kind of digital cluster system.
Background technology
At present, when realizing that in CDMA, CDMA 2000 or CDMA 1X system Digital Clustering is professional, in order to save base station power, the general method of sharing forward traffic channel that all adopts, the base station sends traffic frame by forward direction shared service channel, and a plurality of users (MS) monitor forward direction shared service channel simultaneously and obtain traffic frame.An implementation of forward direction shared service channel is exactly: for the same group under the same sub-district, forward traffic channel (F-TCH) is launched jointly by a plurality of Channel Elementss (CE) in the base station, the F-TCH of all emissions has identical Walsh (WALSH) sign indicating number and long code, MS merges decoding with the F-TCH that receives, its power that receives equals the summation that this sub-district has all F-TCH transmitting powers of identical WALSH sign indicating number and long code, thereby from reaching the purpose of sharing F-TCH in logic.F-TCH as herein described only is represented as the forward traffic channel that MS sets up, and is not limited to concrete channel type.
Wherein, when setting up F-TCH, different MS is set up F-TCH at different selection Dispatching Unit (SDU), and therefore in downlink business frame process of transmitting, the different MS of same group sends traffic frame by different SDU under the same sub-district.Fig. 1 is the processing method schematic diagram that same cluster group MS sets up F-TCH for existing group system.In existing group system, cluster server (PTT Server) is as the control centre of group service, work such as the calling control of main responsible group service, Media Stream distribution, when a cluster group MS is initiated trunked call, base station system (BSS) under each MS is sent to setup requests separately, described setup requests can for the beginning call for ask, page response or add group calling request etc.As shown in Figure 1, the current same cluster group MS that calls out comprises: MS1, MS2, MS3, MS4, MS5, wherein, MS1, MS2 and MS3 belong to BSS1, MS4 and MS5 belong to BSS2, when this cluster group MS was made a call, PTT Server was sent to BSS1 and BSS2 respectively with setup requests, and BSS1 and BSS2 are respectively each MS according to the MS information in each setup requests again and set up F-TCH.Because different MS is set up F-TCH at different SDU, therefore, BSS1 is that MS1 distributes SDU 11Set up F-TCH11, for MS2 distributes SDU 12Set up F-TCH12, for MS3 distributes SDU 13Set up F-TCH13; BSS2 is that MS4 distributes SDU 21Set up F-TCH21, for MS5 distributes SDU 22Set up F-TCH22.
But for MS, if the F-TCH of all MS in the same group under the same sub-district is successfully merged decoding, each F-TCH goes up the traffic frame that sends and must align, otherwise can cause the interference to MS, makes MS can't correctly receive traffic frame.By Figure 1 shows that processing that MS sets up F-TCH as seen, if MS1, MS2 and MS3 are same sub-district MS, and their F-TCH is based upon respectively on the different SDU, like this, need each F-TCH that merges decoding to be based upon different SDU, this just is difficult to guarantee that the traffic frame that sends can align when arriving MS on each F-TCH, thereby the situation that traffic frame can't correctly transmit can occur.Here, the frame number of the traffic frame that the alignment of so-called traffic frame is sent from each F-TCH in other words is identical, and each traffic frame arrives the time interval of MS in the time delay scope of regulation.
In addition, for digital cluster system, need usually to send traffic frame for a large amount of MS under a plurality of sub-districts set up F-TCH simultaneously, a large amount of SDU of the system that will waste like this handle resource, are unfavorable for the realization of digital cluster system.
Summary of the invention
In view of this, main purpose of the present invention is to provide the service frame distribution method in a kind of digital cluster system, make the traffic frame of distributing on the forward traffic channel of in the same sub-district MS of same set group to align, and can save a large amount of SDU and handle resources.
For achieving the above object, technical scheme of the present invention is achieved in that the service frame distribution method that the invention discloses in a kind of digital cluster system, and treatment step is:
A.BSS is when setting up trunked call, for this cluster group each MS in same sub-district that calls out the MS place distributes same SDU to set up forward traffic channel;
B.BSS sends each SDU that this cluster group MS most sets up forward traffic channel with traffic frame when the distribution service frame, traffic frame is distributed to each forward traffic channel of self setting up by this each SDU again.
Among the step a, described processing of setting up forward traffic channel specifically comprises:
A11.BSS judges whether to call out for this cluster set of dispense SDU at MS place, if, execution in step a13; Otherwise execution in step a12;
A12.BSS distributes new SDU to come to set up forward traffic channel for the MS of this calling, execution in step b;
A13.BSS sets up forward traffic channel for the MS of this calling on the SDU that this cluster group has been distributed.
Among the step a11, described being judged as: the BSS cluster group state information that inquiry self is preserved according to the group identity information in this setup requests is judged.
Among the step a13, the method that BSS obtains the SDU information that described this cluster group distributed is: the BSS cluster group state information that inquiry self is preserved according to the group identity information in this setup requests obtains the SDU information that this cluster group has been distributed.
Among the step a, described processing of setting up forward traffic channel specifically comprises:
A21.BSS judges whether to call out for this cluster set of dispense SDU at MS place, if, execution in step a22; Otherwise execution in step a23;
A22.BSS judges whether and can set up the SDU of forward traffic channel for the MS of this calling, if having, selects SDU to set up forward traffic channel, execution in step b for this MS from the SDU that this cluster group has been distributed; Otherwise execution in step a23.
A23.BSS distributes new SDU to come to set up forward traffic channel for the MS of this calling.
Among the step a21, described being judged as: the BSS cluster group state information that inquiry self is preserved according to the group identity information in this setup requests is judged.
Among the step a22, described being judged as: BSS obtains the cluster group state information that this calls out the MS place according to the group identity information query set group state information in this setup requests, judges according to the SDU information in this cluster group state information again.
Among the step a22, described selection SDU is: select a SDU arbitrarily from all can set up the SDU of forward traffic channel for the MS of this calling, perhaps select in all can set up the SDU of forward traffic channel for the MS of this calling by the preset selection criterion.
Wherein, described when setting up forward traffic channel for MS on SDU, the forward traffic channel of setting up for the MS in this same sub-district of cluster group has identical WALSH sign indicating number and long code.
Among the step b, BSS is by from the SDU sum that is distributed as this cluster group of calling out the MS place traffic frame being distributed to each SDU.
Among the step b, each SDU is distributed to each forward traffic channel by the forward traffic channel sum of self setting up with traffic frame.
By such scheme as can be seen, key of the present invention is: each MS of same set group sets up forward traffic channel at same SDU in the same sub-district, and each sets up SDU distribution service frame on each forward traffic channel of self setting up of forward traffic channel.
Therefore, service frame distribution method in the digital cluster system provided by the present invention, the traffic frame that sends on the forward traffic channel of the MS of same set group in same sub-district can be alignd, thereby guarantee that MS can correctly merge decoding to traffic frame, and save SDU greatly and handle resource.
Description of drawings
Fig. 1 is the processing method schematic diagram that same cluster group MS sets up F-TCH for existing group system;
Fig. 2 is a BSS distribution service frame handling process schematic diagram in the inventive method;
Fig. 3 is that MS sets up F-TCH one preferred embodiment handling process schematic diagram for BSS in the inventive method;
Fig. 4 is the realization principle schematic that same cluster group MS sets up F-TCH for group system in the inventive method.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
In the inventive method, be that each MS of same set group sets up F-TCH and distribution service frame in the same sub-district by same SDU.Be example below with the cdma system, the processing of the inventive method is elaborated.
When setting up trunked call, the MS of same sub-district same set group sets up F-TCH at same SDU, and based on this kind call-establishing method, traffic frame in the method for SDU distribution as shown in Figure 2 in the service surface data handling procedure.
Fig. 2 is a BSS distribution service frame handling process schematic diagram in the inventive method, and its concrete treatment step is as follows:
Step 201:BSS receives the traffic frame that sends over from PTT Server.
Step 202:BSS is set up each SDU distribution service frame of upright F-TCH to the cluster that is the MS place of this calling.
Wherein, in the call establishment of a cluster group, when BSS was MS distribution SDU, the quantity of SDU was counted to distribution, such as: what set in advance SDU adds up to 0, whenever be SDU of this cluster set of dispense, will add 1 to the sum of current SDU, and finally obtain the SDU sum that distributed for this cluster group, therefore, in this step, BSS can be distributed to each SDU with traffic frame by this SDU sum.
Step 203: described each SDU of step 202 is distributed to the traffic frame that receives each F-TCH that self sets up respectively.
Here, in the call establishment of a cluster group, at SDU is that MS is when setting up F-TCH, by SDU the quantity of F-TCH is counted, such as: what set in advance F-TCH adds up to 0, whenever be that a MS sets up F-TCH, the sum of current F-TCH will be added 1, thereby finally obtain the F-TCH sum self set up.Therefore, SDU can be distributed to each F-TCH with traffic frame by this F-TCH sum in this step.
Step 204: each MS merges decoding to the F-TCH of same set group in the same sub-district, thereby finally receives traffic frame.
In the methods of the invention, for a cluster group, the F-TCH that sets up for MS in the same sub-district on SDU has identical WALSH sign indicating number and long code, the F-TCH of the MS of same set group must have identical WALSH sign indicating number and long code in the same like this sub-district, therefore, each MS can merge decoding to these F-TCH.
Because, the inventive method is in call setup is handled, the F-TCH of the MS of same set group necessarily is based upon same SDU in the same sub-district, in addition, for existing soft handover, system is that MS sets up the soft handover channel branch at same SDU, and handle (FP) agreement by the frame of cdma system traffic frame is distributed to a soft handover channel branch, frame number and time delay adjustment according to the traffic frame that is defined in the distribution of each channel branch of FP agreement can guarantee the frame alignment, thereby the MS that carries out soft handover can merge decoding to each channel branch, therefore, the inventive method also can be continued to use FP agreement predetermined process when same SDU carries out the traffic frame distribution, thereby guarantee to align, make MS can be correctly merge decoding each F-TCH of same set group in the same sub-district at the traffic frame of each F-TCH distribution.
The inventive method realizes that the key of service frame distribution method shown in Figure 2 is, in the call setup flow process, make the F-TCH of the MS of same set group in the same sub-district be based upon same SDU, the processing in the call setup flow process is described in detail to the inventive method below.Fig. 3 is that MS sets up F-TCH one preferred embodiment handling process schematic diagram for BSS in the inventive method.As shown in Figure 3, its concrete treatment step is as follows:
Step 301:BSS receipt of call is set up request.Here, described setup requests can for the beginning call for ask, page response or add group calling request etc., BSS receives setup requests from the MS side joint.
Step 302:BSS judges according to this setup requests whether this calling is trunked call, if execution in step 303; Otherwise finish to work as pre-treatment.
Wherein, BSS can also can judge whether this calling is trunked call according to the type of message of setup requests according to the business option in the setup requests (SO).Here, according to the specific implementation situation, may increase the field that shows type of message in the setup requests.
Step 303:BSS reads the group identity information in this setup requests, and the cluster group state information that inquiry self is preserved according to this group identity information, thereby judge whether for this call out the MS place the cluster set of dispense SDU, if, execution in step 304; Otherwise execution in step 305.The MS of this calling described herein calls for for the beginning and just is meant caller MS asking, for page response or add and just be meant that request adds the MS of group calling the group calling request etc.
In group system, the cluster component is two classes: permanent group and interim group; The fixed set group that so-called permanent group is divided into MS in advance for system, system will forever preserve this type of cluster group information; So-called group temporarily is the temporary transient cluster group of forming of MS, and after this cluster multi call is end, system will discharge this cluster group information.
Here, described group identity information, for permanent group fixing group ID, for interim group, can be the group ID of interim dynamic assignment, also can be caller MS number or the device id in this call request, as: travelling carriage number (MDN), international mobile subscriber distinguished symbol (IMSI) or Electronic Serial Number (ESN) etc.BSS can inquire corresponding cluster group state information according to group ID, also can according to caller MS number or device id adopts Hash (HASH) thus algorithm obtains index value finds corresponding cluster group state information.
Wherein, described cluster group state information comprises: information such as activation situation, MS connection situation, and for the cluster group that has activated, described cluster group state information comprises also and further comprising: the information of the ID of each sub-district, MS place of having inserted and the SDU that has distributed.Therefore, BSS can according to MS connect the judgement of situation or activation situation whether for the cluster set of dispense at the MS place of this calling SDU, if do not have MS foundation calling connection or cluster group not to be activated, then can adjudicate the also unallocated SDU of cluster group at the MS place of this calling, otherwise the judgement be this calling the MS place the cluster set of dispense SDU.
Being established as of above-mentioned cluster group state information is static, that is: be each cluster set of dispense State Control piece in advance, be used to write down the state information of each cluster group, whenever being arranged, cluster sets up upright the calling, then the State Control piece of this cluster group will write down its state information, and described cluster group state information comprises: this cluster group is activated and has set up the MS information that call out to connect etc.; The foundation of above-mentioned cluster group state information also can be for dynamically, that is: be not each cluster set of dispense State Control piece in advance, just do not write down the state information of each cluster group yet, whenever being arranged, cluster sets up upright the calling, just be this cluster set of dispense State Control piece, and this cluster group state information is carried out record.Therefore, set up cluster group state information if adopt dynamic mode, then when BSS inquires about less than this cluster group state information according to the group identity information of this calling, just can adjudicate the also unallocated SDU of cluster group at the MS place of this calling, otherwise the judgement be this calling the MS place the cluster set of dispense SDU.
The cluster group state information that step 304:BSS preserves according to group identity information inquiry self obtains setting up for this cluster the SDU information of upright F-TCH, as SDU ID etc., and sets up F-TCH for the MS of this calling on this SDU, and pre-treatment is worked as in end.
Step 305:BSS distributes new SDU to come to set up F-TCH for the MS of this calling, finishes to work as pre-treatment.
Described step 301 to step 305 is set up processing of request for the call that the present invention is directed to a MS, BSS all can carry out the processing of above-mentioned steps 301 to step 305 for each setup requests that receives, thereby the F-TCH of each MS of same cluster group in the same BSS coverage all is based upon same SDU, therefore can guarantees that fully the F-TCH of the MS of same set group in the same sub-district is based upon among the same SDU.
The above-described scheme one that is treated to the inventive method in this scheme, all is based upon same SDU with the F-TCH of the same cluster group MS in the same BSS coverage, and this scheme one is applicable to that the cluster group is less, the group system that MS quantity is few.If the MS quantity of a cluster group is very big or be distributed in a lot of sub-districts, then above-mentioned processing method just implements relatively difficulty, at this kind situation, can adopt the scheme two of the inventive method to realize group system, then execute after the above-mentioned steps 303, treatment step is as follows:
Step 304:BSS judges whether to set up the SDU of F-TCH for the MS of this calling, if having, and execution in step 306; Otherwise execution in step 305.
Step 305:BSS distributes new SDU to come to set up F-TCH for the MS of this calling, finishes to work as pre-treatment.
Step 306:BSS can select SDU to set up F-TCH for this MS for this MS sets up from all the SDU of F-TCH, pre-treatment is worked as in end.
Because, in this programme, when SDU sets up F-TCH for the MS of this calling, must follow a criterion, exactly: the MS of same sub-district must set up F-TCH at same SDU in the same set group.Therefore, must at first check the ID that has set up all sub-districts of F-TCH at each SDU above-mentioned when judging whether to set up for the MS of this calling the SDU of F-TCH, as long as SDU has set up the sub-district that comprises the MS place of this calling in the sub-district of F-TCH therein, just must set up F-TCH for this MS by this SDU.
Like this, in described judgement of step 304 and selection course, needing that at first this is called out the ID of sub-district, MS place checks with the ID that has set up all sub-districts of F-TCH at each SDU, as long as one of them SDU has set up the sub-district that comprises the MS place of this calling in the sub-district of F-TCH, then judge to have and to set up the SDU of F-TCH for this MS, and select this SDU to set up F-TCH for this MS; If each SDU has set up the sub-district that does not comprise the MS place of this calling in the sub-district of F-TCH, then as described belowly judge by the access control thresholding that has been provided with.Described access control thresholding can be MS quantity thresholding, load-threshold or number of cells thresholding etc.Here, BSS can be according to the group identity information query set group state information of this calling, obtain the cluster group state information that this calls out the MS place, set up the ID of all sub-districts of F-TCH again according to the SDU information retrieval in this cluster group state information at each SDU; Described SDU information comprises: SDU ID, MS quantity, sub-district ID and load level etc., and because a cluster group can take one or more SDU resources, so the SDU information that BSS retrieves can be one or more SDU information.
If what be provided with is MS quantity thresholding or load-threshold, then estimate to insert this and call out MS MS quantity and the load level of each SDU afterwards according to SDU information, and whether judgement has the MS quantity of SDU or load horizontal estimated value not to exceed corresponding thresholding, if have, then judgement has the SDU that can set up F-TCH for this MS; Otherwise judgement does not have to set up for this MS the SDU of F-TCH.
If what be provided with is the number of cells thresholding, then further comprise cell range in the SDU information, then adjudicate the sub-district that the cell range that whether has in the SDU information comprises the MS place of this calling, if having, then judgement has the SDU that can set up F-TCH for this MS; Otherwise judgement does not have to set up for this MS the SDU of F-TCH.
Wherein, when the number of cells threshold value is set, BSS can be each SDU allocating cell scope according to the number of cells thresholding of each SDU, described cell range can be identified by one or more sub-district ID, like this, carrying out described judgement the time can call out this in ID of sub-district, MS place and each the SDU information and represent the sub-district ID of cell range to mate, if can find a SDU, on behalf of the sub-district ID of cell range, it comprise this sub-district ID, and the number of cells of current SDU does not exceed self set number of cells thresholding, illustrates that then cell range comprises the sub-district at the MS place of this calling; Otherwise illustrate that cell range does not comprise the sub-district at the MS place of this calling.Here, the number of cells of described SDU is for setting up the number of cells of F-TCH at this SDU, and therefore the sub-district ID in the described SDU information can come out described number of cells according to the sub-district ID in the SDU information for set up the ID of the sub-district of F-TCH at this SDU.Obviously, if the number of cells threshold setting is 1, then the realization situation of current group system is exactly, and for SDU of each cell allocation in the same cluster group sets up F-TCH, also is the preferred version that the current cluster system realizes according to this kind of realization situation scheme of existing network.
In addition, described selection SDU calls out the method that MS sets up F-TCH for this also has multiple: can call out the SDU that MS sets up F-TCH SDU of selection arbitrarily for this from all; Can select minimum SDU of the SDU of minimum SDU of present load or MS minimum number or number of cells etc. from these SDU according to the selection criterion that sets in advance yet, but which kind of criterion specifically is set, the present invention does not limit.
Step 301 described in the above scheme two to step 306 is set up processing of request for the call that the present invention is directed to a MS, BSS all can carry out the processing of above-mentioned steps 301 to step 306 for each setup requests that receives, according to the method for the above selection and distribution SDU, this programme can all be based upon same SDU with the F-TCH of each MS of same set group in the same sub-district in the same BSS coverage.
In such scheme two, for how guaranteeing can make in the access control thresholding in the same set group MS is distributed in same SDU under the same sub-district, relevant with the specific implementation situation of the setting of cluster group and SDU, the problem that does not belong to the present invention's design, therefore set here, can make in the access control thresholding in the same set group that MS is distributed in same SDU under the same sub-district, that is: comprise that in retrieving the sub-district that one of them SDU set up F-TCH this calls out the sub-district at MS place, and when inserting this sub-district MS, can guarantee can not make the MS access state of this SDU to exceed set access control thresholding by this SDU; Perhaps, when judging that according to the access control thresholding a certain SDU can insert this MS that calls out the sub-district, can guarantee that in follow-up calling this SDU can insert all MS of this cluster group in the sub-district, MS place of current calling.
In addition, in such scheme one and scheme two, when distributing new SDU for this calling MS, can set up in the process in subsequent voice calls for the new SDU that is distributed, in the access control thresholding, insert MS place cluster group all MS under this BSS of this calling, or call out the problem of all MS that belong to same cells and same set group together of MS with this, relevant with the specific implementation situation of the setting of cluster group and SDU, the problem that does not belong to the present invention's design, therefore set here: the new SDU that is distributed can insert MS place cluster group all MS under this BSS of this calling by current system realization situation, or belong to all MS of same cells and same set group together with the MS of this calling.
In addition, in above-mentioned two kinds of schemes, on SDU, set up a F-TCH for each MS, and, the F-TCH that sets up for the MS of the same sub-district of same set group has identical WALSH sign indicating number and long code, be the F-TCH that the MS of same set group different districts sets up, its WALSH sign indicating number and long code can be the same or different.Here, for the MS of the same sub-district of same set group sets up when having the F-TCH of identical WALSH sign indicating number and long code, can be provided with automatically according to current MS place cluster group and sub-district by BSS, its specific implementation process does not belong to emphasis of the present invention, therefore is not described further here.
Above-mentionedly be treated to the processing that the inventive method is carried out at a BSS, for trunked call, the MS of same cluster group may be distributed in the coverage of a plurality of BSS, calling for a cluster group, BSS under each MS is sent to setup requests separately, each BSS all can carry out above-mentioned processing for each setup requests that receives, thereby sets up F-TCH for each MS of this cluster group.
By above BSS be MS set up F-TCH processing as seen, use the inventive method, when setting up trunked call, the MS of same sub-district of same set group or different districts can set up F-TCH at same SDU, and Fig. 4 is the realization principle schematic that same cluster group MS sets up F-TCH for group system in the inventive method.In Fig. 4, the current same cluster group MS that calls out comprises: MS1, MS2, MS3, MS4, MS5, wherein, MS1, MS2 and MS3 belong to BSS1, MS4 and MS5 belong to BSS2, when this cluster group MS made a call, each MS was sent to BSS1 and BSS2 respectively with setup requests, and BSS1 and BSS2 are respectively each MS according to the MS information in each setup requests again and set up F-TCH.For the MS1 that is in same sub-district under the BSS1, MS2 and MS3, BSS1 distributes SDU 11For these three MS set up F-TCH11, F-TCH12 and F-TCH13 respectively; For MS4 that is in same sub-district under the BSS2 and MS5, BSS2 distributes SDU 21For MS4 and MS5 set up F-TCH21 and F-TCH22 respectively.Like this, in the traffic frame distribution procedure, the MS1 of same sub-district, MS2 and MS3 are from same SDU 11Receive traffic frame, the MS4 of same sub-district and MS5 are from same SDU 21Receive traffic frame, thereby traffic frame can guarantee alignment when making each MS merge decoding to the traffic frame that receives.
In the inventive method, the described processing that distributes SDU to set up F-TCH for MS of the described traffic frame distribution processor of Fig. 2 and Fig. 3 adheres to two relatively independent processes separately, but trunked call for a MS, BSS need at first carry out the processing that the described distribution of Fig. 3 SDU sets up F-TCH, carries out the processing of the described distribution service frame of Fig. 2 again.The setup requests that BSS whenever receives MS promptly can execution graph 3 described processing, and as long as a cluster group is activated, BSS will continue to carry out the described distribution service frame of Fig. 2 at this cluster group to be handled, such as: every traffic frame of 20ms distribution, but each time during the distribution service frame, BSS will send for the SDU quantity of this cluster set of dispense and the quantity of setting up F-TCH on SDU according to current.
In such scheme, the F-TCH of one or more sub-district MS is based upon same SDU in the same set group, thereby saved a large amount of SDU and handled resource, alleviated the load of BSS, system resource is optimized, and in addition, the F-TCH of the MS of same set group is based upon same SDU in the same sub-district, allow to guarantee the traffic frame alignment carrying out traffic frame distribution, make cluster group MS correctly merge decoding the traffic frame that each F-TCH goes up distribution.
The inventive method can also be applied to CDMA 2000 and CDMA 1X system, and processing method is identical with the above-mentioned processing that is applied to cdma system, is not described further here.
In sum, adopt the inventive method that the traffic frame of distributing on the F-TCH of the MS of same set group in same sub-district can be alignd, thereby guarantee the correct reception of traffic frame, and can save SDU greatly and handle resource.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (11)

1. the service frame distribution method in the digital cluster system is characterized in that treatment step is:
A. base station system BSS is when setting up trunked call, for each MS of cluster group in same sub-district at this calling party MS place distributes same selection Dispatching Unit SDU to set up forward traffic channel;
B.BSS sends each SDU that this cluster group MS most sets up forward traffic channel with traffic frame when the distribution service frame, traffic frame is distributed to each forward traffic channel of self setting up by this each SDU again.
2. method according to claim 1 is characterized in that, among the step a, described processing of setting up forward traffic channel specifically comprises:
A11.BSS judges whether to call out for this cluster set of dispense SDU at MS place, if, execution in step a13; Otherwise execution in step a12;
A12.BSS distributes new SDU to come to set up forward traffic channel for the MS of this calling, execution in step b;
A13.BSS sets up forward traffic channel for the MS of this calling on the SDU that this cluster group has been distributed.
3. method according to claim 2 is characterized in that, among the step a11, described being judged as: the BSS cluster group state information that inquiry self is preserved according to the group identity information in this setup requests is judged.
4. method according to claim 2, it is characterized in that, among the step a13, the method that BSS obtains the SDU information that described this cluster group distributed is: the BSS cluster group state information that inquiry self is preserved according to the group identity information in this setup requests obtains the SDU information that this cluster group has been distributed.
5. method according to claim 1 is characterized in that, among the step a, described processing of setting up forward traffic channel specifically comprises:
A21.BSS judges whether to call out for this cluster set of dispense SDU at MS place, if, execution in step a22; Otherwise execution in step a23;
A22.BSS judges whether and can set up the SDU of forward traffic channel for the MS of this calling, if having, selects SDU to set up forward traffic channel, execution in step b for this MS from the SDU that this cluster group has been distributed; Otherwise execution in step a23.
A23.BSS distributes new SDU to come to set up forward traffic channel for the MS of this calling.
6. method according to claim 5 is characterized in that, among the step a21, described being judged as: the BSS cluster group state information that inquiry self is preserved according to the group identity information in this setup requests is judged.
7. method according to claim 5, it is characterized in that, among the step a22, described being judged as: BSS is according to the group identity information query set group state information in this setup requests, obtain the cluster group state information that this calls out the MS place, judge according to the SDU information in this cluster group state information again.
8. method according to claim 5, it is characterized in that, among the step a22, described selection SDU is: select a SDU arbitrarily from all can set up the SDU of forward traffic channel for the MS of this calling, perhaps select in all can set up the SDU of forward traffic channel for the MS of this calling by the preset selection criterion.
9. according to claim 1,2 or 5 described methods, it is characterized in that described when setting up forward traffic channel for MS on SDU, the forward traffic channel of setting up for the MS in this same sub-district of cluster group has identical Walsh WALSH sign indicating number and long code.
10. method according to claim 1 is characterized in that, among the step b, BSS is by from the SDU sum that is distributed as this cluster group of calling out the MS place traffic frame being distributed to each SDU.
11. method according to claim 1 is characterized in that, among the step b, each SDU is distributed to each forward traffic channel by the forward traffic channel sum of self setting up with traffic frame.
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