CN100401807C

CN100401807C - Creation for shared link in digit group system

Info

Publication number: CN100401807C
Application number: CNB2004100917271A
Authority: CN
Inventors: 罗雄; 吕莎; 尧俊峰; 符子建; 冯成林
Original assignee: Huawei Technologies Co Ltd
Current assignee: Global Innovation Polymerization LLC; Gw Partnership Co ltd
Priority date: 2004-11-25
Filing date: 2004-11-25
Publication date: 2008-07-09
Anticipated expiration: 2024-11-25
Also published as: CN1780424A

Abstract

The present invention discloses a method for establishing a shared link in a digital cluster system. The method comprises: a) after receiving an establishing request of a cluster call, a wireless access network (RAN) judges that whether the current call is the first time call in the current call cluster group; if yes, a link is established for the current call, and the current processing is ended; otherwise, step b is performed; b) the wireless access network judges that whether the cluster group establishes a link; if yes, the information of the current call is added in the information of the established link, and the current processing is ended: otherwise, the current call is cached; c) the wireless access network judges that if the current link is established successfully or not; the cached call information is added to the successfully established link information; if failing, the wireless access network releases the current cached call. The method of the present invention can reduce loss probability and avoid the repetition establishment of the shared link, and accordingly the present invention improves the quality of service.

Description

The method for building up of shared link in a kind of digital cluster system

Technical field

The present invention relates to the service link realization technology in the digital cluster system, particularly the method for building up of shared link in the digital cluster system.

Background technology

At present, (PTT, Push-to-Talk) business are meant real-time point-to-point and put the multiple spot Speech Communication to be applied to collaborative work and the PTT that exchanges between team, working group, the colony.This professional half-duplex mode that adopts promptly has only a people to talk at one time, as long as pressing certain special keys, the calling party just can need not dialing and wait for the other side's off-hook to a people or one group of initiation conversation, and the conversation demand working, thus set up particular talk group rapidly.

When realizing that in CDMA, CDMA 2000 or CDMA 1X system Digital Clustering is professional, the group service data are transmitted by packet network, and portable terminal (MS) carries out the mutual of signaling and data by wireless access network (RAN) and packet network.In order to realize the transmission of data between RAN and packet network, need in the signalling interactive process of call setup, set up data link between the entity of RAN inside and between RAN and the packet network entity.In RAN inside, mainly comprise with the professional relevant entity of Processing Cluster: base station controller (BSC) and Packet Control Function (PCF) entity; And on the packet network with group service handle relevant functional entity be ptt server (PS, PTTServer).Wherein, it is packet data package that BSC is responsible for from collect mail order and data encapsulation of MS side joint, and sends it to PCF, and the while is also from PCF receiving block data bag and be assembled into traffic frame and be distributed to each MS; PCF is responsible for the signaling and the data of Packet data service are handled, and the data link is carried out whole management and control; PS calls out group service as the control centre of group service and controls, and work such as responsible Media Stream distribution.

Because, group service adopts the half-duplex operation mode, and the then same time has only a people to talk, and listens in order to realize a people many people that talk, talker's speech data need be sent to the PS of special disposal group service, speech data is distributed to each listener by RAN by PS.Like this, in the conversation of same cluster group, the data that send at the reverse link from talker MS to PS and each the bar forward link from PS to each listener MS are identical.Therefore, set up speed for saving link circuit resource, speed call, RAN will be the call setup shared link of same cluster group when receiving trunked call.

Set up in the process at existing trunked call shared link, the trunked call that the BSC of RAN inside receives is judged after setting up request: whether current calling is that the first time trunked call of this cluster group under this BSC set up request, if, BSC and PCF are mutual, distribute new A8 chain line, set up the A8 link; Otherwise current call information is added into this BSC to be set up in the upright A8 link information for this cluster; And the PCF among the RAN judges after receiving the A8 request for building link: whether current calling is the A8 request for building link first time of this cluster group, if PCF and PS are mutual, distributes new GMP chain line, sets up the GMP link; Otherwise current call information is added into this PCF to be set up in the upright GMP link information for this cluster.

Wherein, BSC and PCF are when setting up new A8 link, BSC sends the A8 request for building link to PCF, set up A8 message A9-Setup-A8 as A9, and successfully receive A8 link that PCF returns up to BSC and connect and reply, when connecting A8 message A9-Connect-A8 as A9, this A8 link is just successfully set up, if BSC does not receive A9-Connect-A8 message at the appointed time, the successfully foundation of A8 link is described then.

Like this, when a plurality of users of same cluster group make a call the foundation request simultaneously, will go wrong.Such as: when BSC be call out to send for the first time of cluster group A9-Setup-A8 to PCF after, when not receiving the A9-Connect-A8 message that PCF returns, BSC receives this cluster group setup requests for the second time again, at this moment, BSC will adjudicate not for this reason for the second time setup requests and set up the A8 link, and this is called out for the second time and will share same A8 link with calling out the described first time; If but BSC does not receive the A9-Connect-A8 message of calling out correspondence for the first time at the appointed time, the successfully foundation of A8 link of calling out for the first time is described, call out this moment for the second time and the subsequent voice calls of this cluster group will not have operable link yet, and this will cause a large amount of call losses of this cluster group.

Prior art also provides the method for building up of another kind of trunked call shared link, and to set up process similar with above-mentioned shared link, and different is that described being judged as: BSC judges self whether to form merit for current calling cluster and set up an A8 link; PCF judges self whether to form merit for current calling cluster and set up a GMP link.

Also can go wrong when adopting this kind shared link method for building up to set up trunked call.Such as: when BSC call out to send A9-Setup-A8 to PCF at first time of cluster group, when not receiving the A9-Connect-A8 message that PCF returns, BSC receives this cluster group setup requests for the second time again, at this moment, owing to BSC successfully is that this cluster is set up upright A8 link, therefore will adjudicate to be this second time of call setup A8 link; If but BSC receives the A9-Connect-A8 message of calling out correspondence for the first time at the appointed time subsequently, illustrate that the A8 link of calling out for the first time successfully sets up, call out the described second time of this moment even subsequent voice calls that may this cluster group has all begun to set up the A8 link.Like this, BSC will repeat to set up the A8 link for the calling of same cluster group, can not really realize the link sharing of trunked call, waste system link resource.

When the GMP link of setting up between PCF and the PS, also can produce the above-mentioned similar problem that in A8 link establishment process, occurs.

This shows that the present method for building up of shared link in the digital cluster system is concentrated when setting up at a plurality of trunked calls, cause easily a large amount of call losses or shared link repeat set up, have a strong impact on the group service quality, can not effectively utilize system resource.

Summary of the invention

In view of this, main purpose of the present invention is to provide the method for building up of shared link in a kind of digital cluster system, the calling each time that can guarantee group service can both have available link, and avoids the foundation that repeats of shared link, thereby improves quality of service, saving link circuit resource.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention discloses the method for building up of shared link in a kind of digital cluster system, this method comprises:

After a.RAN receives trunked call foundation request, judge whether current calling is the calling first time of current calling cluster group, if, be current call setup link, finish to work as pre-treatment; Otherwise execution in step b;

B. judge whether established link of this cluster group, if, in the information of the link of having set up, add current call information, finish to work as pre-treatment; Otherwise the current calling of buffer memory;

C. judge that current link establishment is success or failure, if success is added into the call information of institute's buffer memory in the information of the link that success sets up; If failure then discharges the calling of current cache.

Among the step c, before described release current cache was called out, this method further comprised:

C1. judge whether the link establishment number of times has reached the link establishment number of times thresholding that sets in advance, if the residue that discharges institute's buffer memory is called out, and finishes to work as pre-treatment; Otherwise execution in step c2.

C2. from the calling of institute's buffer memory, extract a calling, be this call setup link, and record link establishment number of times;

C3. the described link establishment of determining step c2 is success or failure, if success is added into the residue call information of institute's buffer memory in the information of the link of successfully setting up; If step c1 is returned in failure.

Wherein, the link of described foundation is: the GMP link between PCF among the RAN and the outside PS;

Among the step a: the trunked call that described RAN receives is set up the A8 request for building link that request receives for PCF; Described being judged as: PCF judges whether current calling is the A8 request for building link first time of this cluster group; Perhaps, judge whether current calling is the first time A8 request for building link of this cluster group under the BSC of current calling.

Wherein, the link of described foundation is: the A8 link between inner BSC of RAN and the PCF;

Among the step a: described trunked call is set up request and is set up request for the trunked call that BSC receives; Described being judged as: BSC judges whether current calling is that the first time trunked call of this cluster group under this BSC set up request.

Wherein, described when setting up the A8 link, this method further comprises: PCF and PS are the call setup GMP link that current request is set up the A8 link.

Wherein, described when setting up the A8 link, this method further comprises:

A11.PCF judges that whether A8 link that current request sets up is that this cluster group is asked the A8 link set up for the first time, if PCF and PS are the call setup GMP link that current request is set up the A8 link, pre-treatment is worked as in end; Otherwise execution in step b11;

B11.PCF judges whether to set up upright GMP link for this cluster, if, in the information of the corresponding GMP link of this cluster group, add current call information, finish to work as pre-treatment; Otherwise the current call information of buffer memory;

C11.PCF judges that current GMP link establishment is success or failure, if success is added into the call information of institute's buffer memory in the information of the GMP link that success sets up; If failure then discharges the calling of current cache.

Among the step c11, before the calling of described release current cache, this method further comprises:

C111. judge whether GMP link establishment number of times has reached the link establishment number of times thresholding that sets in advance, if the residue that discharges institute's buffer memory is called out, and finishes to work as pre-treatment; Otherwise execution in step c112.

C112. from the calling of institute's buffer memory, extract a calling, be this call setup GMP link, and record GMP link establishment number of times;

C113. the described GMP link establishment of determining step c112 is success or failure, if success is added into the residue call information of institute's buffer memory in the information of the GMP link of successfully setting up; If step c111 is returned in failure.

Wherein, the described GMP of judgement link establishment is that the success or the method for failure are: PCF is according to whether receiving the GMP link establishment acknowledge message that PS returns in the stipulated time in agreement, and the cause value that this message is carried is represented the link establishment success, and the GMP link of judging current foundation is success or failure; Perhaps,

PCF is according to receiving GMP link establishment acknowledge message from PS in the stipulated time in agreement, and the cause value that this message is carried represents the link establishment success, adjudicates current GMP link establishment success; According to the GMP link establishment acknowledge message from PS, and the cause value that carries of this message represents the link establishment failure, adjudicates current GMP link establishment failure.

Wherein, the described A8 of judgement link establishment is that the success or the method for failure are: BSC receives A8 link that PCF returns according to whether in agreement and connects that to reply the A8 link of judging current foundation be success or failure in the stipulated time; Perhaps,

BSC replys according to the A8 link connection that receives in the stipulated time in agreement from PCF, adjudicates current A8 link establishment success; According to A8 link Release complete, adjudicate current A8 link establishment failure from PCF.

By such scheme as can be seen, key of the present invention is: RAN if the non-cluster group of current calling is called out for the first time, and self forms merit for this cluster and does not set up link when setting up shared link, then at first should call out buffer memory and get up; Then, when this cluster is formed merit and set up link, the call information of self buffer memory is added in this link information of successfully setting up, sets up when founding link failure, be the call setup link of self buffer memory at this cluster.

Therefore, the method for building up of shared link in the digital cluster system provided by the present invention, can avoid the foundation that repeats of shared link, and can make cluster multi call available link is arranged when the shared link, thereby a service link is shared in the calling that really realizes same cluster group, and the percent of call lost that significantly reduces, can effectively utilize system resource to realize high-quality group service.

Description of drawings

Fig. 1 sets up sharing A 8 links one preferred embodiment handling process schematic diagram in the inventive method;

Fig. 2 is the call setup A8 link one preferred embodiment handling process schematic diagram of institute's buffer memory among Fig. 1;

Fig. 3 sets up in the inventive method to share GMP link one preferred embodiment handling process schematic diagram;

Fig. 4 is the call setup GMP link one preferred embodiment handling process schematic diagram of institute's buffer memory among Fig. 3.

Embodiment

The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.

The method for building up of shared link can be applicable to the process of setting up of sharing A 8 links and/or shared GMP link in the digital cluster system disclosed by the invention, wherein, be call setup sharing A 8 links of the same cluster group under the same BSC, for the call setup of the same cluster group under the same PCF is shared the GMP link.Below in conjunction with accompanying drawing the A8 of the inventive method and/or GMP shared link being set up process is described in detail.

Fig. 1 sets up sharing A 8 links one preferred embodiment handling process schematic diagram in the inventive method.Wherein, the A8 link is the service link between BSC and the PCF, and BSC mainly comprises Call Control Unit (CC) and rm-cell (RM); When setting up calling, be responsible for the signaling process of call flow by CC, reception/transmission setup requests, sending resource bid/release asks to RM, carry out interacting message with external entity, preserve cluster group id and user profile among the CC, be responsible for the distribution and the management of business processing resources, A8 link circuit resource, and preserve cluster group information by RM.A8 link establishment process as shown in Figure 1 is by the CC among the BSC, RM, and PCF finishes jointly, and concrete treatment step comprises:

The trunked call request of setting up that step 101:CC receives MS sends resource bid request Resource Apply Request to RM afterwards.Here, the request of setting up of described trunked call can for the beginning call for ask, page response or add group calling request etc., this trunked call is set up in request and the described ResourceApply Request message and is comprised: information such as cluster group id, user ID.

Cluster group id in the step 102:RM read step 101 described Resource Apply Request message, according to the cluster group information of self preserving, judge the request of setting up of the current trunked call that receives whether be under self place BSC this cluster group for the first time trunked call set up request, if then execution in step 106; Otherwise execution in step 103.

Step 103:RM judges according to this cluster group information of self preserving whether BSC sets up upright A8 link for this cluster, if, execution in step 104; Otherwise execution in step 105.

Here, by background technology as can be known when setting up the shared link of group service, according to the cluster group information of preserving separately, BSC can know whether current calling is this cluster group setup requests for the first time, and whether set up upright A8 link for this cluster, PCF can know also whether current calling is this cluster group A8 request for building link for the first time, and whether sets up upright GMP link for this cluster, and therefore concrete determination methods this paper no longer describes in detail.

Step 104: in the A8 link information that this cluster group of self preserving has been set up, add current call information, such as: in the A8 link user information corresponding that this cluster group has been set up, add the user of current calling etc., thereby make current calling share this A8 link; And returning Resource ApplyConfirm message to CC, it is that this cluster is set up upright new A8 link that this message indication CC need not, and finishes to work as pre-treatment.

Step 105: the current call information of buffer memory, finish to work as pre-treatment.BSC will be behind the result who receives this cluster group A8 link establishment, and the call information of institute's buffer memory is carried out respective handling.Here, the call information of institute's buffer memory comprises: cluster group id, user ID etc.

Wherein, for ease of the management of call setup, described call information is stored as the formation of first in first out usually.The mode of described buffer memory has multiple, such as: open up static call information array according to this cluster group user number and be used for the buffer memory call information; Perhaps, with dynamic buffer memory call information of chain sheet form or the like, specifically adopt which kind of call information cache way relevant with the realization situation and the cluster group scale of system, the present invention does not limit.

Step 106:RM returns Resource Apply Confirm message to CC, and CC is set up upright A8 link for this cluster by this message indication, thereby CC sends A9-Setup-A8 message to the PCF that this BSC connected, and the A8 link is set up in request.

Here, the described method of whether setting up upright A8 link by Resource Apply Confirm message indication CC for this cluster, can comprise: one, indicate by in this message, filling invalid or effective A8 chain line (A8 Traffic ID), two, in this message flag bit being set indicates or the like, the method of concrete indication has multiple, and the present invention does not limit.

As seen described by Fig. 1, when BSC received trunked call, if current calling is the first time setup requests of this cluster group under this BSC, then BSC sent the A8 request for building link to PCF, thereby begins to be current call setup A8 link; If current calling non-described first time of setup requests, and BSC successfully is that this cluster is set up upright A8 link, and then current calling will be shared this A8 link of having set up; If current calling non-described first time of setup requests, and BSC also successfully is that this cluster is set up upright A8 link, the current call information of BSC buffer memory then up to knowing that this cluster sets up the result of upright A8 link, is handled the calling of institute's buffer memory again.

Fig. 2 is the call setup A8 link one preferred embodiment handling process schematic diagram of institute's buffer memory among Fig. 1.As shown in Figure 2, when A8 link establishment success, execution in step 201 is to step 205; When the A8 link establishment was failed, execution in step 201 ' was to step 205 '.

When A8 link establishment success, the concrete processing comprises:

Step 201～step 202:PCF returns A9-Connect-A8 message to CC after the A8 link assignment resource, and CC sends resource authorization request Resource Affirm Request again to RM

Step 203～step 204:RM receives in official hour after the described ResourceAffirm Request of step 202 message, current A8 link establishment success is described, then in this newly-established A8 link information, add self this cluster multi call of buffer memory information, as: user profile etc., thus this cluster multi call of RM institute buffer memory is sharing this A8 link.Simultaneously, RM returns resource confirmation affirmation Resource Affirm Confirm message and gives CC, finishes this A8 link establishment process.

Wherein, when BSC sets up the A8 link, pick up counting to PCF,, current A8 link establishment success is described if in the agreement official hour, receive the A9-Connect-A8 message that PCF returns from sending A8-Setup-A9 message; Otherwise A8 link establishment failure is described.Therefore, BSC when sending A8-Setup-A9 message, starts timer usually, and the overtime threshold setting of this timer is the duration of this agreement stipulated time, if BSC receives A9-Connect-A8 message before timer expiry, just can adjudicate A8 link establishment success; Otherwise judgement A8 link establishment failure.Described timer is started by CC usually, and CC sends Resource Affirm Request message to RM when judgement A8 link establishment success, sends resource release request Resource ReleaseRequest message to RM when judgement A8 link establishment failure.

Here, whether RM successfully receives the message that CC sends for judgement, when sending Resource ApplyConfirm message, also need to start timer, this length of timer is determined according to the inside realization situation of BSC, if RM receives Resource Affirm Request message before timer expiry, then can adjudicate A8 link establishment success; Otherwise judgement A8 link establishment failure, perhaps judgement A8 link establishment failure when receiving Resource Release Request message.

In addition, also timer can only be set in RM, according to the Resource Affirm Request message that whether received before timer expiry from CC, whether judgement A8 link sets up success.The concrete implementation that adopts which kind of timer, the problem that non-the present invention solves no longer describes in detail here.

Step 205:RM returns Resource Apply Confirm message to CC, by this message the previous Resource Apply Request message that sends of CC is replied, and indication CC need not to set up upright A8 link into this cluster.

Wherein, above-mentioned steps 201, step 202, the described message of step 204 is and this cluster group relevant message of call setup for the first time, and step 203, step 205 described be at this cluster multi call of current cache processing.Therefore the Resource Apply Confirm message returned of step 205 should with this cluster multi call of current cache corresponding one by one, RM will be followed successively by each calling that is buffered and return Resource Apply Confirm message.

When the A8 link establishment was failed, the concrete processing comprised:

Step 201 '～step 202 ': during A8 link establishment failure, PCF returns A8 link Release complete to CC, discharge A8 as A9 and finish A9-Release-A8 Complete message, carry the information such as A8 Traffic ID of the A8 link of current foundation failure in this message, thus the current A8 link establishment failure of indication CC.CC sends Resource Release Request message to RM, carries step 201 in this message equally ' information such as cause value in the described A9-Release-A8 Complete message, A8Traffic ID.

Step 203 ': RM is according to the Resource Release Request message that receives, discharge this A8 Traffic ID that self preserves, thereby discharge this A8 link circuit resource, and return resource release and confirm Resource Release Confirm message to CC, the resource of finishing the A8 link of this foundation failure discharges.

Because, if RM does not receive Resource Affirm Request message at the appointed time, also can adjudicate current A8 link establishment failure, therefore, RM can start timer when sending Resource Apply Confirm message, the overtime threshold setting of this timer is the duration of this stipulated time, if RM does not receive Resource Affirm Request message before timer expiry, current A8 link establishment failure is described, then directly triggers RM and carry out above-mentioned steps 203 '.

Cause value in the described Resource Release Request message of step 204 '～205 ': RM is according to step 202 ' is learnt, this discharges request for the A8 link that A8 link establishment failure triggers, therefore from the call information of self buffer memory, extract a calling, send Resource ApplyConfirm message to CC according to this call information, CC was before replied for the Resource Apply Request message that this calling sends, and begin to set up the A8 link by this message indication CC, CC sends A9-Setup-A8 to PCF again, is this call setup A8 link.

Then, BSC is as described in Figure 2 according to the result of this A8 link establishment of being known, and decision is added into the residue call information of self buffer memory the next call of in the A8 link information of successfully setting up, still extracting buffer memory for this call setup A8 link or discharge the residue call information of self buffer memory.

Here, can set in advance A8 link establishment number of times thresholding, the initial value that A8 link establishment number of times is set is zero, extract each time before the calling of buffer memory, whether the number of times that is judged as the call setup A8 link of buffer memory reaches this link establishment number of times thresholding, if BSC will discharge the residue call information of buffer memory, finish trunked call and set up process; Otherwise extract a calling from buffer memory, be this call setup A8 link, and the number of times of record A8 link establishment.Like this, in above-mentioned steps 204 ' before, further comprise: judge whether A8 link establishment number of times reaches set link establishment number of times thresholding, if, discharge the calling of current cache, finish to work as pre-treatment; Otherwise execution in step 204 '.

In the present embodiment, the A8 link establishment failure of calling out for the first time when this cluster group, the call setup that BSC will continue as buffer memory once or once above A8 link, though can reduce call loss so as far as possible, but the time delay that trunked call will be set up is oversize, and takies a large amount of system resource.The present invention also proposes another kind of implementation: if the A8 link establishment that this cluster group is called out for the first time failure, BSC all discharges the calling of self buffer memory, notice cluster group user makes a call again to set up and asks then described step 204 ' and step 205 ' needn't carry out.Not only the trunked call setup delay is shorter to adopt this kind mode, also more saves system resource.Here, RM is when discharging the calling of buffer memory, and RM carries the cause value that shows A8 link establishment failure in the ResourceApply Confirm message of returning to CC, indication CC: need not to set up the A8 link, the failure of notice MS call setup.

The described message of wherein, above-mentioned steps 201 ', step 202 ', step 203 ' is and this cluster group relevant message of call setup for the first time, and step 204 ' described be at this cluster multi call of current cache processing.Therefore,, step 204 as RM during in the calling that discharges buffer memory ' the ResourceApply Confirm message of being returned and this cluster multi call of current cache are corresponding one by one, and the quantity of this message is identical with the call number of institute's buffer memory.

When the inventive method is applied to share setting up of GMP link, its handle with share the A8 link to set up process basic identical.Fig. 3 sets up in the inventive method to share GMP link one preferred embodiment handling process schematic diagram.As shown in Figure 3, specifically comprise step:

Step 301:PCF receives after the A9-Setup-A8 message that BSC sends, and judges that whether this A9-Setup-A8 message be the cluster group A8 request for building link for the first time of current calling, if, execution in step 302; Otherwise execution in step 303.

Step 302:PCF sends GMP request for building link Link Setup Request message to PS, thereby is current call setup GMP link, finishes to work as pre-treatment.

Step 303:PCF judges according to this cluster group information of self preserving whether self sets up upright GMP link for this cluster, if, execution in step 304; Otherwise execution in step 305.

Step 304: in the GMP link information that this cluster group of self preserving has been set up, add current call information, such as: in the information of the GMP link that this cluster group has been set up, add this PCF or the newly assigned A8 Traffic of BSC ID etc., thereby the A8 link that this request is set up can be shared this GMP link, finishes to work as pre-treatment.

Step 305: the current call information of buffer memory, finish to work as pre-treatment.BSC will be behind the result of knowing this cluster group GMP link establishment, and the call information of institute's buffer memory is carried out respective handling.Here, the call information of institute's buffer memory comprises: information such as cluster group id, A8 Traffic ID.

As seen from Figure 3, when PCF received trunked call, if current calling is the first time A8 request for building link of this cluster group under this PCF, then PCF sent the GMP request for building link to PS, thereby began the A8 link establishment GMP link for current request foundation; If current calling non-described first time of A8 request for building link, and PCF successfully is that this cluster is set up upright GMP link, then the A8 link set up of current request will be shared the GMP link that this has been set up; If current calling non-described first time of A8 request for building link, and PCF also successfully is that this cluster is set up upright GMP link, the current call information of PCF buffer memory then up to knowing that this cluster sets up the result of upright GMP link, is handled the calling of institute's buffer memory again.

The described processing of above-mentioned Fig. 3 is applied to trunked call when setting up, and can make the all-calls of same cluster group under the same PCF share same GMP link.In the networking process of group system reality, a common PCF is connected with one or more BSC, and therefore, according to the needs that system realizes, PCF also can only be that the call setup of same cluster group under the same BSC is shared the GMP link.Set up the processing of the shared GMP link of this kind and shown in Figure 3 basic identical, different is: step 301 is described to be judged as, and PCF judges whether that according to the sign of the BSC in the described A8 request for building link this A9-Setup-A8 message is the first time A8 request for building link of this cluster group under this BSC.

Fig. 4 is the call setup GMP link one preferred embodiment handling process schematic diagram of institute's buffer memory among Fig. 3.As shown in Figure 4, when GMP link establishment success, execution in step 401 and step 402; When the GMP link establishment is failed, execution in step 401 ' and step 402 '.

When GMP link establishment success, the concrete processing comprises:

Step 401:PS returns the GMP link establishment to PCF after the GMP link assignment resource to confirm Link Setup Confirm message, and this message carries cause value such as link establishment successfully waits information, shows that current GMP link successfully sets up.

Step 402:PCF receives in the agreement official hour after the described Link SetupConfirm of step 401 message, adjudicate current GMP link establishment success, then in this newly-established GMP link information, add self this cluster multi call of buffer memory information, as: A8 Traffic ID etc., thus this cluster multi call of PCF institute buffer memory is sharing this GMP link.

Here, PCF starts timer when sending Link Setup Request, the overtime threshold setting of this timer is the duration of above-mentioned agreement stipulated time, if before timer expiry, receive LinkSetup Confirm message, and this message is carried cause value such as link establishment successfully waits information, then adjudicate this cluster group and successfully set up the GMP link, the A8 link sharing that this cluster group request of this message trigger PCF buffer memory is set up should the successful GMP link of setting up.

When the GMP link establishment was failed, the concrete processing comprised:

Step 401 ': during GMP link establishment failure, PS returns Link Setup Confirm message to PCF, carry the information such as GMP chain line of cause value such as link establishment failure and current foundation failure in this message, thus the current GMP link establishment failure of indication PCF.

Cause value in the described Link Setup Confirm message of step 402 ': PCF is according to step 401 ' is learnt, the GMP link establishment acknowledge message that this triggers for GMP link establishment failure, therefore from the call information of self buffer memory, extract the A8 link information that a request is set up, send Link Setup Request message to PS according to this A8 link information, be the A8 link establishment GMP link of this request foundation.

In addition, if PCF does not receive Link Setup Confirm message in agreement in the stipulated time, also can adjudicate current GMP link establishment failure, therefore, PCF can start timer when sending Link Setup Request, the overtime threshold setting of this timer is the duration of this agreement stipulated time, if not receive and carry cause value be the LinkSetup Confirm message that link establishment successfully waits information to PCF before timer expiry, GMP link establishment failure is described, then directly triggers PCF execution in step 402 '.

Then, PCF is as described in Figure 4 according to the result of this GMP link establishment, and decision is added into the residue call information of self buffer memory in the GMP link information of successfully setting up, still sets up the GMP link for the next call of buffer memory or discharges the residue calling of self buffer memory.

Here, can set in advance the number of times thresholding of setting up the GMP link, the initial value that GMP link establishment number of times is set is zero, extract each time before the calling of buffer memory, whether the number of times that is judged as the call setup GMP link of buffer memory reaches this link establishment number of times thresholding, if PCF will discharge the residue call information of buffer memory, finish trunked call and set up process; Otherwise extract a calling from buffer memory, be this call setup GMP link, and the number of times of record GMP link establishment.Like this, in above-mentioned steps 402 ' before, further comprise: whether the number of times of judging the GMP link establishment reaches set link establishment number of times thresholding, if, discharge the calling of current cache, finish to work as pre-treatment; Otherwise execution in step 402 '.

In the present embodiment, when the GMP link establishment failure for the first time of this cluster group, the call setup that PCF will continue as buffer memory once or once above GMP link, with above-mentioned A8 link to set up process the same, in order to shorten time delay, the saving system resource that trunked call is set up, PCF can also be when the GMP link establishment failure for the first time of this cluster group, the calling of self buffer memory is all discharged, and return the call setup failure to cluster group user by BSC, the user is made a call the again request of setting up, then described step 402 ' needn't carry out.

Above-mentioned Fig. 1 to Fig. 4 describes the process of setting up of sharing A 8 links and shared GMP link in the inventive method respectively, and the present invention also can set up sharing A 8 links and shared GMP link simultaneously in conjunction with the method for Fig. 1 to Fig. 4.That is to say: the CC among the BSC receives trunked call and sets up request, promptly begin the described processing of execution graph 1 and Fig. 2, PCF receives after the A8 request for building link, also begin the described processing of execution graph 3 and Fig. 4, thereby the A8 link that RAN and PS can share at the call setup under the same BSC for same cluster group, and be the shared GMP link of the A8 link establishment of same cluster group under same PCF.

Here, because for the user of same set group foundation under the same BSC is sharing A 8 links, when PCF receives the A8 request for building link, must also not set up upright GMP link for this cluster under this BSC, therefore, when the networking mode of system is the corresponding BSC of a PCF, when perhaps needing to share the GMP link for the call setup of same cluster group under the same BSC, A8 link and GMP link have formed relation one to one for a PCF, need not then to judge that the promptly current as can be known A8 request for building link that receives is the first time A8 request for building link of this cluster group under this BSC, and this cluster group also only has this A8 request for building link under this BSC, therefore PCF need not to prepare the A8 link information that cache request is set up, thereby when the GMP link is shared in foundation, the flow process that adopts is same as the prior art, that is: the described step 301 of Fig. 3, step 303, step 304, step 305, the described step 402 of Fig. 4, step 402 ' all needn't carry out.

Because, problem solved by the invention at calling be: the received non-calling first time of BSC/PCF when not having the A8/GMP link of successfully foundation that the cluster group is current; And call out for the first time and the cluster group is current calls out BSC/PCF receives when the A8/GMP link of setting up is arranged successfully non-for the first time for the cluster group that BSC/PCF receives, prior art is adopted in the foundation of its sharing A 8/GMP link, do not belong to the problem that the present invention relates to, so this paper is not described further.

In sum, using the inventive method can solve when setting up sharing A 8 and/or GMP link, the recurrent shared link of prior art repeats to set up, because the problems such as call loss that no available link causes, can really effectively utilize system resource to realize shared link, and guarantee rational group service call setup success rate to improve quality of service.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.

Claims

1. the method for building up of shared link in the digital cluster system is characterized in that this method comprises:

A. after wireless access network RAN receives trunked call foundation request, judge whether current calling is the calling first time of current calling cluster group, if, be current call setup link, finish to work as pre-treatment; Otherwise execution in step b;

2. method according to claim 1 is characterized in that, among the step c, before described release current cache was called out, this method further comprised:

C3. the described link establishment of determining step c2 is success or failure, if success is added into the residue call information of institute's buffer memory in the information of the described link of successfully setting up of step c2; If step c1 is returned in failure.

3. method according to claim 1 and 2 is characterized in that, the link of described foundation is: the shadowing agreement GMP of the group link between Packet Control Function entity PCF among the RAN and the external key to-talk service server PS;

Among the step a:

The trunked call that described RAN receives is set up the A8 request for building link that request receives for PCF;

Described being judged as: PCF judges whether current calling is the A8 request for building link first time of this cluster group; Perhaps, judge whether current calling is the first time A8 request for building link of this cluster group under the base station controller BSC of current calling.

4. method according to claim 1 and 2 is characterized in that, the link of described foundation is: the A8 link between inner base station controller BSC of RAN and the Packet Control Function entity PCF;

Among the step a:

Described trunked call is set up request and is set up request for the trunked call that BSC receives;

Described being judged as: BSC judges whether current calling is that the first time trunked call of this cluster group under this BSC set up request.

5. method according to claim 4 is characterized in that, described when setting up the A8 link, this method further comprises: PCF and PTT service server PS are the shadowing agreement GMP of the call setup group link that current request is set up the A8 link.

6. method according to claim 4 is characterized in that, described when setting up the A8 link, this method further comprises:

A11.PCF judges that whether A8 link that current request sets up is that this cluster group is asked the A8 link set up for the first time, if, Packet Control Function entity PCF and PTT service server PS are the shadowing agreement GMP of the call setup group link that current request is set up the A8 link, finish to work as pre-treatment; Otherwise execution in step b11;

C11.PCF judges that current GMP link establishment is success or failure, if success is added into the call information of institute's buffer memory in the information of the GMP link of successfully setting up; If failure then discharges the calling of current cache.

7. method according to claim 6 is characterized in that, among the step c11, before the calling of described release current cache, this method further comprises:

C113. the described GMP link establishment of determining step c112 is success or failure, if success is added into the residue call information of institute's buffer memory in the information of the described GMP link of successfully setting up of step c112; If step c111 is returned in failure.

8. method according to claim 3, it is characterized in that, the described GMP of judgement link establishment is that the success or the method for failure are: PCF is according to whether receiving the GMP link establishment acknowledge message that PS returns in the stipulated time in agreement, and the cause value that this message is carried is represented the link establishment success, and the GMP link of judging current foundation is success or failure; Perhaps,

9. method according to claim 4, it is characterized in that the described A8 of judgement link establishment is that the success or the method for failure are: BSC receives A8 link that PCF returns according to whether in agreement and connects that to reply the A8 link of judging current foundation be success or failure in the stipulated time; Perhaps,

10. method according to claim 6, it is characterized in that, the described GMP of judgement link establishment is that the success or the method for failure are: PCF is according to whether receiving the GMP link establishment acknowledge message that PS returns in the stipulated time in agreement, and the cause value that this message is carried is represented the link establishment success, and the GMP link of judging current foundation is success or failure; Perhaps,