CN100387069C - Method of allocating wireless reversed channel in cluster service for cellular communication system - Google Patents
Method of allocating wireless reversed channel in cluster service for cellular communication system Download PDFInfo
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- CN100387069C CN100387069C CNB031567738A CN03156773A CN100387069C CN 100387069 C CN100387069 C CN 100387069C CN B031567738 A CNB031567738 A CN B031567738A CN 03156773 A CN03156773 A CN 03156773A CN 100387069 C CN100387069 C CN 100387069C
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Abstract
The present invention relates to a method of allocating wireless reverse channels in cluster service for a cellular communication system. The method is complementary with a method for establishing a wireless reverse channel for each user; service is provided for cluster service users by the sharing of a wireless reverse channel in order that reverse channel resources are saved. In the method of the present invention, a sharing wireless reverse channel and at least one front broadcasting channel are allocated to a plurality of wireless terminals in the same cluster group in the same district by a base station control center in voice group call service. In implementation, the sharing reverse channel can be a fixed reverse channel allocated to each district in advance; when a user applies to speak, the reverse channel is used, and the reverse channel is used by other users applying speaking after speaking; the reverse channel can also be a reverse channel for the dynamic application of a cluster group user applying speaking in each district, and after the user finishes speaking, the reverse channel is recovered, and other users apply again in speaking.
Description
Technical field
The present invention relates to mobile communication technology, relate to cellular communication system distributes wireless back channel in group service method or rather.
Background technology
Wireless channel is divided into forward channel and backward channel, and forward channel is meant that from the base station to the channel of wireless terminal, backward channel is then opposite, is meant the channel of wireless terminal to the base station.Suppose that A is the base station, B is a wireless terminal, and forward channel is walked in the communication on A->B direction so, and backward channel is walked in the communication on B->A direction.
Voice group call service and Voice Broadcast Service are two main businesses in the cluster communication service, and it is group calling that the typical case of group service uses, and are characterized in conversing carrying out between a plurality of group members (group member can be called for short the group membership).
Voice group call service in the mobile communication system (VGCS:vioce Group Call Service), the trunked call of realization semiduplex mode.Usually, two class group members are arranged in the cluster group: one or more dispatchers and one or more cluster service user, the dispatcher must just can become the dispatcher through system authorization.User terminal as the dispatcher can be any telephone plant, and as the public network mobile phone of normal telephone machine or various standards, but cluster service user must be a wireless terminal of supporting group service.Interior any cluster service user and any one dispatcher through mandate of cluster group all can initiate the group calling request.When the group calling request was initiated, all dispatchers in the cluster group and the cluster service user in the group calling scope can both receive group calling and initiate request.Any dispatcher can talk at any time, but at one time, only allows a cluster service user speech, and they are by obtaining right to speak by the PTT key.
The characteristics of voice group call service are: each cluster service user is when listening, and the content that they heard all is the same; A cluster service user speech can only be arranged at one time.
Though group service is with a long history, also is a new things to cellular communication system, thereby realizes the technical new challenge that also proposed at it as the common network operation.
At present, cellular communication system is to distribute, set up a wireless back channel at each user, and coming provides service for the user.
When cellular communication system provides group service, if still continue to use this technology, distribute a wireless back channel at each cluster service user, will cause the significant wastage of wireless back channel, because in numerous cluster service users, have only user's speech at one time; Simultaneously do so also and can impact to cell capacity.
Summary of the invention
The objective of the invention is to design a kind of cellular communication system distributes wireless back channel in group service method, form complementary effect with the method for setting up a wireless back channel for each user, by utilizing shared wireless back channel to provide service, reach the purpose of saving the wireless back channel resource for cluster service user.
The technical scheme that realizes the object of the invention is such: a kind of cellular communication system distributes the method for wireless back channel in group service, it is characterized in that:
In voice group call service, base station control center is shared wireless back channel of a plurality of wireless terminals distribution of the same cluster group in the same sub-district according to the resource assignation request of the voice group call service that receives.
Also comprise: when base station control center receives the resource assignation request of voice group call service, according to the Serving cell in request message tabulation, for each Serving cell to Forward Broadcast Channel that is used for broadcast of overabsorption.
Shared wireless back channel can be the fixing wireless back channel of allocating in advance to each sub-district, when the cluster service user application speech of same sub-district, the wireless back channel that this is fixing offers this user and uses, after finishing, this user's speech then abdicates this fixing wireless back channel, for user's use of other application speeches in same sub-district, the same cluster group.
Shared wireless back channel can also be the wireless back channel for a cluster service user dynamic assignment of application speech in each sub-district, promptly reclaims this wireless back channel after this user's speech finishes.
Method of the present invention adopts shared wireless back channel to provide service for cluster service user, and this shared wireless back channel can be allocated in advance, and whose use who applies for; Also can apply at any time distributing at any time.Owing to all cluster service users in the sub-district are enjoyed a wireless back channel jointly, thereby construction, operation, the maintenance cost of cellular communication system have been reduced; Share by wireless channel in addition, also improved cell capacity.
Method of the present invention can be applicable in the mobile application technology scheme in the CDMA mobile telecommunication network, but is not limited thereto.
Description of drawings
Fig. 1 is the FB(flow block) of the professional fixed allocation backward channel of VGCS method;
Fig. 2 is the FB(flow block) that the VGCS service dynamic is distributed the backward channel method.
Embodiment
According to the VGCS business features, the content that each cluster service user is heard at one time all is the same, in same sub-district, just there is no need so to each user distributes a forward channel, can only distribute a forward shared channel to listen for all users; In addition, each service-user can be talked in different time, but user's speech can only be arranged at one time, can only distribute a reversed shared channel shared for all cluster service users of this sub-district so in same sub-district.
In voice group call service, the thought by the present invention shares wireless back channel, can adopt two kinds of distribution methods to share backward channel: fixed allocation shares backward channel and dynamic assignment is shared backward channel.
Fixed allocation is shared backward channel, be in same sub-district, to allocate a fixing backward channel in advance for all cluster group users, pass through application when having the user to talk, the backward channel that can will fix offers this user and uses, then abdicate this backward channel after this user's speech finishes, this backward channel of vacating can be distributed to other users of cluster group that file an application and succeed in this sub-district.
Dynamic assignment is shared backward channel, is when the user applies speech is arranged, and just for it distributes backward channel, promptly discharges (recovery) this backward channel after this user has said, when the user applies speech is arranged in the next same sub-district, applies for and redistribute backward channel more again.
The common trait of two kinds of distribution methods be at one time in, be that all users of same cluster group in the sub-district are dispensed to many backward channels.
With the VGCS business is example, and the implementation method of fixed allocation of the present invention and dynamic assignment backward channel is described.An important feature of VGCS business is: all cluster group service-users are listened simultaneously, but a cluster group service-user speech can only be arranged at one time at the most.So in same sub-district,, can set up a Forward Broadcast Channel and a reversed shared channel fully no matter have only a user that a plurality of users are still arranged.Because can only monitoring a forward channel simultaneously, all users just can reach the purpose that everybody hears simultaneously, in at one time, have only a user to allow speech at the most again, so only distribute a Forward Broadcast Channel and a backward channel just can satisfy the VGCS business demand.
Referring to Fig. 1, the realization flow of the professional fixed allocation backward channel of VGCS shown in the figure.
Referring to Fig. 2, the service dynamic of VGCS shown in the figure is distributed the realization flow of backward channel.
Step 21, when the base station controller among the BSS is received the resource assignation request of VGCS business, according to the tabulation of the Serving cell in the message, distribution services sub-district assigned resources, wherein in each sub-district at the most forward direction of an assignment be used for the channel of broadcast, but wouldn't the assigned reverse channel.Forward direction of an assignment is used for the channel of broadcast at the most, is that system can not distribute Forward Broadcast Channel according to the strategy of oneself because may not have the VGCS service-user in some sub-district;
Claims (6)
1. cellular communication system distributes wireless back channel in group service method is characterized in that:
In voice group call service, base station control center is shared wireless back channel of a plurality of wireless terminals distribution of the same cluster group in the same sub-district according to the resource assignation request of the voice group call service that receives.
2. cellular communication system according to claim 1 distributes the method for wireless back channel in group service, it is characterized in that also comprising: when base station control center receives the resource assignation request of voice group call service, according to the Serving cell in request message tabulation, for each Serving cell to Forward Broadcast Channel that is used for broadcast of overabsorption.
3. cellular communication system according to claim 1 and 2 distributes the method for wireless back channel in group service, it is characterized in that: a described shared wireless back channel is the fixing wireless back channel of allocating in advance to this sub-district, when the cluster service user application speech of same sub-district, the wireless back channel that this is fixing offers this user and uses, after finishing, this user's speech then abdicates this fixing wireless back channel, for user's use of other application speeches in same sub-district, the same cluster group.
4. cellular communication system according to claim 3 distributes the method for wireless back channel in group service, it is characterized in that: described fixing wireless back channel, be when base station control center receives the resource assignation request of voice group call service, according to the tabulation of the Serving cell in the request message, for each Serving cell distributes a wireless back channel.
5. cellular communication system according to claim 1 and 2 distributes the method for wireless back channel in group service, it is characterized in that: a described shared wireless back channel, be wireless back channel, after this user's speech finishes, promptly reclaim this wireless back channel for a cluster service user dynamic assignment of application speech in the same sub-district.
6. cellular communication system according to claim 5 distributes the method for wireless back channel in group service, it is characterized in that: the wireless back channel of described dynamic assignment, be when the cluster service user application is talked, by a wireless back channel of the dynamic application of base station control center; Base station control center receives this user and talks and reclaim this wireless back channel after the signaling that finishes.
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CNB031567738A CN100387069C (en) | 2003-09-10 | 2003-09-10 | Method of allocating wireless reversed channel in cluster service for cellular communication system |
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CN100396124C (en) * | 2005-11-23 | 2008-06-18 | 华为技术有限公司 | Method for saving group calling resource |
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