CN106686554B - Communication method, device and base station of cluster system - Google Patents
Communication method, device and base station of cluster system Download PDFInfo
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- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The invention discloses a communication method of a cluster system, which comprises the following steps: when a base station identifies that a user terminal related to a group exists in a cell of the base station, establishing a corresponding relation between the group and the related user terminal; and when receiving group calling/multicast data of a group sent by a core network, scheduling the group calling/multicast data to the user terminals corresponding to the group according to the corresponding relationship. The invention also discloses a communication device and a base station of the corresponding cluster system. The invention solves the problem of spectrum resource waste caused by the fact that the position of the user terminal contained in the group corresponding to the group calling/multicast data can not be determined, and improves the spectrum utilization rate.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a communication method, an apparatus, and a base station for a trunking system.
Background
With the development of wireless communication technology, spectrum resources become more and more tense, for example, in an L TE (L ong terminal evolution, long term evolution) trunking private network, due to trunking characteristics such as trunking group calling, multimedia services such as voice, images, video and the like are transmitted by adopting a multicast broadcast mode, and more system bandwidth needs to be occupied, so that spectrum resources are more tense, and how to maximally utilize spectrum resources becomes an important problem.
In the L TE technology, a coverage Area of a L TE network is divided into a plurality of TAs (Tracking areas), one TA may include one or more cells, and the plurality of TAs form a TA list (TA L ist) and are simultaneously allocated to a UE (user equipment).
However, when a user initiates a group calling, the user initiates a group calling in a plurality of cells under one or a plurality of TA L ist configured in advance, and then sends the group calling data of the group, when the cell receiving the group calling data does not have the user of the group, the waste of system air interface resources is caused, especially when the group calling service is a video group calling, the waste of the system air interface resources is more obvious, meanwhile, the relevant base station broadcasts the group calling data of the group in the cell, and if the user terminal of the group exists in the cell, the air interface resources are effectively occupied.
Disclosure of Invention
The invention aims to provide a communication method, a communication device and a base station of a cluster system, aiming at the problems that air interface resources are wasted and the spectrum utilization rate of the system is reduced due to the fact that cluster group calling is initiated in the prior art, and the spectrum utilization rate is effectively improved.
The technical solution adopted by the present invention to solve the above technical problems is to provide a communication method of a trunking system, including: when a base station identifies that a user terminal related to a group exists in a cell of the base station, establishing a corresponding relation between the group and the related user terminal; and when receiving group calling/multicast data of a group sent by a core network, scheduling the group calling/multicast data to the user terminals corresponding to the group according to the corresponding relationship.
Wherein, after establishing the corresponding relationship between the group and the related user terminal, the method comprises: the base station keeps the user terminal establishing the corresponding relation in a connection state;
the base station scheduling the group calling/multicast data comprises: the base station acquires the channel condition of the user terminal kept in a connection state; determining a modulation coding mode adopted for scheduling the group calling/multicast data according to the channel condition; scheduling the group calling/multicast data according to the determined modulation coding mode; wherein the channel condition includes a reference signal received power contained in a channel quality status/measurement report reported by the ue.
Wherein the base station scheduling the group call/multicast data further comprises: the base station acquires the user position of the user terminal kept in a connection state; determining a resource block adopted for scheduling the group calling/multicast data according to the user position so as to schedule the group calling/multicast data; the user position is the position of the user terminal in the cell determined by the base station according to the measurement report reported by the user terminal.
Wherein the establishing of the correspondence between the group and the related user terminal comprises: receiving group information reported by a user terminal; and establishing a corresponding relation between the user terminal and the group corresponding to the group information.
The receiving of the group information reported by the user terminal includes: the base station broadcasts a trunking paging message containing group information on a trunking paging channel; and receiving the group information carried in the trunking paging message reported by the user terminal when the user terminal determines that the user terminal is related to the group information in the trunking paging message.
The receiving of the group information reported by the user terminal includes: and the base station receives the measurement report message reported by the user terminal and acquires the group information carried in the measurement report message.
Wherein, after the establishing the corresponding relationship between the group and the related user terminal, the method further comprises: and when detecting that the user terminal with the established corresponding relation is in the off-line state, the base station releases the corresponding relation between the user terminal in the off-line state and the group.
Wherein, after the establishing the corresponding relationship between the group and the related user terminal, the method further comprises: and when the user terminal which establishes the corresponding relation with the group is identified to be related to another group, releasing the corresponding relation between the identified user terminal and the group, and establishing the corresponding relation between the identified user terminal and the other group, wherein the priority of the other group is higher than or equal to the priority of the group.
Another technical solution adopted by the present invention to solve the above technical problem is to provide a communication device of a trunking system, including: an establishing module, configured to establish a correspondence between a group and a related user terminal when it is identified that the user terminal related to the group exists in a cell of the base station; and the scheduling module is used for scheduling the group calling/multicast data to the user terminals corresponding to the group according to the corresponding relation when receiving the group calling/multicast data of the group sent by the core network.
Another technical solution adopted by the present invention to solve the above technical problems is to provide a base station, which includes a processor, a receiver, a transmitter, and a memory; the memory for storing computer instructions configured to be executed by the processor; the processor executing the computer instructions to: when identifying that a user terminal related to a group exists in a cell of the base station, establishing a corresponding relation between the group and the related user terminal; and when the receiver receives group calling/multicast data of a group issued by a core network, the group calling/multicast data is scheduled according to the corresponding relation and then is sent to the user terminal corresponding to the group through the sender.
Wherein, after the processor executes the establishment of the corresponding relationship between the group and the related user terminal, the method includes: the processor keeps the user terminal establishing the corresponding relation in a connection state;
the processor executes the scheduling of the group calling/multicast data, and specifically includes: acquiring the channel condition of the user terminal kept in a connection state; determining a modulation coding mode adopted for scheduling the group calling/multicast data according to the channel condition; scheduling the group calling/multicast data according to the determined modulation coding mode; wherein the channel condition includes a reference signal received power contained in a channel quality status/measurement report reported by the ue.
Wherein, the processor executing the establishment of the corresponding relationship between the group and the related user terminal specifically includes: receiving group information reported by a user terminal through the receiver; and establishing a corresponding relation between the user terminal and the group corresponding to the group information.
The processor executes the group information reported by the receiver receiving user terminal, and the group information includes: broadcasting a trunking paging message containing group information on a trunking paging channel; and receiving the group information carried in the trunking paging message reported by the user terminal when the user terminal is determined to be related to the group information in the trunking paging message through the receiver.
The processor executes the group information reported by the receiver receiving user terminal, and the group information includes: and the processor receives the measurement report message reported by the user terminal through the receiver and acquires the group information carried in the measurement report message.
Wherein, after the processor establishes the corresponding relationship between the group and the related user terminal, the processor further comprises: and when detecting that the user terminal with the established corresponding relation is in a offline state, the processor releases the corresponding relation between the user terminal in the offline state and the group.
Wherein, after the processor establishes the corresponding relationship between the group and the related user terminal, the processor further comprises: and when the user terminal which establishes the corresponding relation with the group is identified to be related to another group, releasing the corresponding relation between the identified user terminal and the group, and establishing the corresponding relation between the identified user terminal and the other group, wherein the priority of the other group is higher than or equal to the priority of the group.
The invention has the following beneficial effects: when the base station identifies the user terminal related to the group, the corresponding relation between the user terminal and the group is established, and when the group calling/multicast data is issued, the group calling/multicast data is scheduled according to the corresponding relation, so that the problem of frequency spectrum resource waste caused by the fact that the position of the user terminal contained in the group corresponding to the group calling/multicast data cannot be determined is solved, and the frequency spectrum utilization rate is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and embodiments, in which:
FIG. 1 is a schematic block diagram of an embodiment of a communication system in which the present invention is employed;
FIG. 2 is a flow chart of an embodiment of a communication method of the cluster system of the present invention;
fig. 3 is a schematic structural diagram of an embodiment of a communication device of the cluster system of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
For the purpose of understanding the present invention, a communication system used in the present invention will be described.
As shown in fig. 1, which is a schematic structural diagram of an embodiment of a communication system adopted by the present invention, taking L TE trunking private network as an example, a communication system 10 is a L TE broadband trunking communication system, and includes a plurality of user terminals 11-15, a plurality of base stations 16-18, and a core network 19, where the user terminals 11-15 are connected to the core network 19 through the base stations 16-18 via an IP transport network 20, and the core network 19 is used for mobility management and call management, for example, issuing group call/multicast data.
Assuming that a plurality of user terminals 12-14 belong to a trunking group a, the plurality of user terminals 12-14 perform trunking communication, such as group call service, multicast service, etc., with the core network 19 through the base stations 16, 17. For example, if the user terminal 12 initiates the group call of the group a, the user terminal 12 sends the group call data to the core network 19 through the base station 16, at this time, the base station 17 has a corresponding relationship between the group a and the user terminals 13 and 14, that is, a user terminal list of the group a is provided in the base station 17, and the user terminal list is not empty at this time, after the core network 19 issues the group call data to the base station 17, the base station 17 schedules the group call data to the user terminals 13 and 14. The base station 18 has the user terminal 15, but the user terminal 15 does not belong to the cluster group a, and further the base station 18 does not have the user terminal in the cluster group a, that is, the user terminal list of the cluster group a set in the base station 18 is empty, and at this time, the base station 18 does not schedule the group call data. Therefore, the waste of system air interface resources is reduced, and the frequency spectrum utilization rate is improved.
It should be noted that in this embodiment, the base stations 16 and 17 may include not only the cluster group a but also other cluster groups, that is, the base stations 16 and 17 may have multiple cluster groups, that is, other user terminals exist under the cells of the base stations 16 and 17. For example, the base station 16 further includes a cluster group B, and if the user terminal 11 belongs to the cluster group B, the base station 16 has a corresponding relationship between the user terminal 11 and the cluster group B, and when the core network 19 issues the group call or multicast data of the cluster group B, the base station 16 schedules the group call or multicast data to the user terminal 11 according to the corresponding relationship.
In addition, the communication network where the user terminal of the present invention is located is not limited to L TE trunking private network, and in other embodiments, the communication network may be any wireless communication network.
Specifically, in this embodiment, the base station 16 has a corresponding relationship between the user terminal 11 and the cluster group B, and the base station 17 has a corresponding relationship between the cluster group a and the user terminals 13 and 14, which can refer to the following embodiments.
Fig. 2 is a flowchart of an embodiment of a communication method of the trunking system of the present invention, where the communication method is executed by the base station in fig. 1, and includes the following steps:
step S202: when the base station identifies that the user terminals related to the group exist in the cell of the base station, the base station establishes the corresponding relation between the group and the related user terminals.
In step S202, when a user terminal related to a certain group exists in a cell of the base station, a corresponding relationship between the group and the related user terminal is established, and the base station can identify whether the user terminal related to the group exists in its own cell according to a manner reported by the user terminal, specifically, step S202 includes: firstly, a base station receives group information reported by a user terminal, and then, establishes a corresponding relation between the user terminal and a group corresponding to the group information. The group information includes, but is not limited to, TGID (TrunkingGroupID).
The base station receives the group information reported by the user terminal, namely identifies the user terminal related to the group corresponding to the group information, and specifically, in one embodiment, the base station receives the group information carried in the group paging message reported by the user terminal when determining that the user terminal is related to the group information in the group paging message, the base station receives the group paging message after broadcasting the group paging message, if the group paging message is interested by the base station, the user terminal determines that the user terminal is related to the group information in the group paging message, and at the moment, the user terminal reports the group information to the base station, wherein if the user terminal is in a CONNECTED state (RRC _ CONCTED state), the user terminal reports the group information to the base station through an allocated channel, and if the user terminal is in a CONNECTED state (RRC _ CONCTED state), the user terminal reports the group information to the base station in a random access mode, and the group paging message is a group paging message which is reported by the base station, wherein the group paging message is a group paging message which is corresponding to the group paging message is reported to the group paging message, and the group paging message is called by the group paging message.
In another embodiment, the receiving, by the base station, the group information reported by the ue includes: and the base station receives the measurement report message reported by the user terminal and acquires the group information carried in the measurement report message. Thus, the base station receives the group information reported by the user terminal, and further can identify the user terminal related to the group corresponding to the group information. Of course, in other embodiments, the base station may also identify the group to which the user terminal is related through a private interface between itself and the core network, which is within the understanding of those skilled in the art and will not be described herein.
Step S204: and when receiving the group calling/multicast data of a group sent by the core network, scheduling the group calling/multicast data to the user terminals corresponding to the group according to the corresponding relation.
In step S204, after the corresponding relationship between the ue and the group is established in step S202, at this time, the core network issues the group call/multicast data of the group, and the base station receives the group call/multicast data and schedules the group call/multicast data to the ue corresponding to the group according to the established corresponding relationship. Specifically, in an embodiment, the scheduling, by the base station, the group call/multicast data to the user terminals corresponding to the group according to the correspondence includes: judging whether a group calling/multicast data group corresponding relation exists; if yes, the base station dispatches the group calling/multicast data to the user terminal corresponding to the group; if not, the base station does not schedule the group calling/multicast data. The problem that the base station cannot confirm whether the user terminals in the group corresponding to the group calling/multicast data exist in the cell or not, and still issues the group calling/multicast data to cause the waste of system air interface resources is solved, so that the system bandwidth can be distributed to the user terminals which are needed under the base station, and the spectrum utilization rate of the system is improved.
Through the implementation of the embodiment, the base station establishes the corresponding relationship between the user terminal and the group when identifying the user terminal related to the group, and schedules the group calling/multicast data according to the corresponding relationship when the group calling/multicast data is issued, so that the problem of spectrum resource waste caused by the fact that the position of the user terminal included in the group corresponding to the group calling/multicast data cannot be determined is solved, and the spectrum utilization rate is improved.
Further, after the base station establishes the correspondence between the group and the related user terminal in step S202, the base station keeps the user terminal establishing the correspondence in the RRC _ CONNECTED state, and at this time, the base station may schedule the group call/multicast data to the user terminal corresponding to the group by acquiring the channel condition of the user terminal, so that the base station may adaptively adopt an appropriate modulation and coding scheme on the basis of comprehensively considering the channel condition of the user terminal, thereby further improving the spectrum utilization rate of the system.
Specifically, in one embodiment, in step S204, the scheduling group call/multicast data by the base station includes: firstly, acquiring the channel condition of the user terminal in the connection state, then determining the modulation coding mode adopted by the group calling/multicast data scheduling according to the channel condition, and further scheduling the group calling/multicast data according to the determined modulation coding mode. The channel condition includes a reference signal received power contained in a channel quality status/measurement report reported by the user equipment. Compared with the prior art that the base station can not obtain the channel condition of the user terminal participating in the group call in the cell and selects a relatively low modulation coding mode, the base station determines the modulation coding mode used for scheduling the group call data according to the channel condition of the user terminal, so that the self-adaptive modulation coding mode can be realized, and in addition, when the users participating in the group call are all close, the modulation coding mode is determined according to the channel condition of the user terminal, so that the utilization rate of a system frequency spectrum is greatly improved.
In other embodiments, on the basis of the above embodiment, the base station may further obtain the user location of the user terminal that is kept in the connected state, and then determine a Resource Block (RB) for scheduling the group call/multicast data according to the user location to schedule the group call/multicast data. For example, the base station acquires the user locations of a plurality of user terminals that are kept in a connected state, and if the user locations of the plurality of user terminals satisfy a certain policy, selects to schedule group call/multicast data in the central resource, and if another policy is satisfied, selects to schedule group call/multicast data in the edge resource. In this embodiment, the user location is a location of the user terminal in the cell, which is determined by the base station according to the measurement report reported by the user terminal.
Further, in step S202, after establishing the corresponding relationship between the group and the related user terminal, the method further includes: when detecting that the user terminal with the established corresponding relation is in the off-line state, the base station releases the corresponding relation between the user terminal in the off-line state and the group. Therefore, the base station updates the corresponding relation between the user terminal and the group in real time, when the group calling/multicast data is issued, the group calling/multicast data is conveniently scheduled according to the corresponding relation, and the frequency spectrum utilization rate is improved.
Further, in step S202, after establishing the corresponding relationship between the group and the related user terminal, the method further includes: and when the user terminal which establishes the corresponding relation with the group is identified to be related to another group, the corresponding relation between the identified user terminal and the group is released, and the corresponding relation between the identified user terminal and the other group is established, wherein the priority of the other group is higher than or equal to that of the group. The establishment of the correspondence between the identified ue and another group is the same as the establishment of the correspondence between the group and the related ue in step S202, and is within the understanding range of those skilled in the art and will not be described again.
Fig. 3 is a schematic structural diagram of a communication device 300 of a cluster system according to an embodiment of the present invention, where the communication device is used for a base station, and includes an establishing module 310 and a scheduling module 320.
The establishing module 310 is configured to establish a corresponding relationship between a group and a related user terminal when it is identified that the user terminal related to the group exists in a cell of a base station;
the scheduling module 320 is configured to schedule the group call/multicast data to the user terminals corresponding to the group according to the corresponding relationship when receiving the group call/multicast data of the group issued by the core network.
Further, the establishing module 310 is specifically configured to receive group information reported by the user terminal; and establishing a corresponding relation between the user terminal and the group corresponding to the group information.
Further, in an embodiment, after the establishing module 310 establishes the correspondence between the group and the related user terminal, the establishing module 310 is further configured to release the correspondence between the user terminal in the offline state and the group when detecting that the user terminal in which the correspondence is established is in the offline state.
Further, in another embodiment, after the establishing module 310 establishes the correspondence between the group and the related user terminal, the establishing module 310 is further configured to, when it is identified that the user terminal having established the correspondence with the group is related to another group, release the correspondence between the identified user terminal and the group, and establish the correspondence between the identified user terminal and the other group, where a priority of the other group is higher than or equal to a priority of the group.
Further, the scheduling module 320 is specifically configured to determine whether there is a group correspondence relationship of group call/multicast data; if yes, the scheduling module 320 schedules the group call/multicast data to the user terminals corresponding to the group; if not, the scheduling module 320 does not schedule the group call/multicast data.
Further, after the establishing module 310 establishes the corresponding relationship between the group and the related ue, the establishing module 310 is further configured to keep the ue establishing the corresponding relationship in an RRC _ CONNECTED state, and at this time, the scheduling module 320 schedules the group call/multicast data, which specifically includes: firstly, acquiring the channel condition of the user terminal in the connection state, then determining the modulation coding mode adopted by the group calling/multicast data scheduling according to the channel condition, and further scheduling the group calling/multicast data according to the determined modulation coding mode. The channel condition includes a reference signal received power contained in a channel quality status/measurement report reported by the user equipment.
For the specific description, please refer to the description of the method embodiments above, the modules of the apparatus may be used to execute the steps in the method embodiments above.
Fig. 4 is a schematic structural diagram of an embodiment of a base station of the present invention, where the base station of this embodiment is the base station in fig. 1, for example, the base station 16, or the base station 17, or the base station 18, and the base station includes a receiver 410, a transmitter 420, a processor 430, a memory 440, and a bus 450;
the receiver 410 is configured to receive a message sent by an external device, for example, a group message reported by a user equipment, group call/multicast data of a group issued by a core network, and the like.
The transmitter 420 is configured to transmit a message, such as scheduled group call/multicast data, to an external device.
Memory 440 is used to store computer instructions configured to be executed by processor 430, as well as data that needs to be saved or cached during operation of processor 430.
In this embodiment, the processor 430 is configured to execute, by calling the computer instructions stored in the memory 440:
when identifying that the user terminal related to the group exists in the cell of the base station, establishing a corresponding relation between the group and the related user terminal;
when the receiver 410 receives group call/multicast data of a group issued by the core network, the group call/multicast data is scheduled according to the corresponding relationship, and then is sent to the user terminal corresponding to the group through the sender 420.
Further, the processor 430 performs the establishing of the corresponding relationship between the group and the related user terminal, including: receiving group information reported by a user terminal through a receiver 410; and establishing a corresponding relation between the user terminal and the group corresponding to the group information.
Further, in an embodiment, after the processor 430 performs establishing the correspondence between the group and the related user terminal, it also performs releasing the correspondence between the user terminal in the offline state and the group when detecting that the user terminal with the established correspondence is in the offline state.
Further, in another embodiment, the processor 430, after performing establishing the correspondence between the group and the related user terminal, further performs, when it is identified that the user terminal having established the correspondence with the group is related to another group, releasing the correspondence between the identified user terminal and the group, and establishing the correspondence between the identified user terminal and another group, wherein the priority of the another group is higher than or equal to the priority of the group.
Further, the processor 430 executes the scheduling of the group call/multicast data according to the corresponding relationship, and further sends the group call/multicast data to the user terminals corresponding to the group through the sender 420, including: judging whether a group calling/multicast data group corresponding relation exists; if yes, scheduling the group calling/multicast data, and further sending the group calling/multicast data to the user terminal corresponding to the group through the sender 420; if not, not scheduling the group calling/multicast data.
Further, after performing the establishment of the correspondence between the group and the related ue, the processor 430 further performs maintaining the ue in RRC _ CONNECTED state, where the processor 430 performs scheduling of group call/multicast data, including: firstly, acquiring the channel condition of a user terminal kept in a connection state, then determining the modulation coding mode adopted by scheduling the group calling/multicast data according to the channel condition, and further scheduling the group calling/multicast data according to the determined modulation coding mode. The channel condition includes a reference signal received power contained in a channel quality status/measurement report reported by the user equipment. Further, the processor 430 instructs the transmitter 420 to transmit the scheduled group call/multicast data to the user terminals corresponding to the group.
In this embodiment, when the base station identifies the user terminal related to the group, the base station establishes a corresponding relationship between the user terminal and the group, and schedules the group call/multicast data according to the corresponding relationship when the group call/multicast data is issued, thereby solving the problem of spectrum resource waste caused by the fact that the position of the user terminal included in the group corresponding to the group call/multicast data cannot be determined, and improving the spectrum utilization rate.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (12)
1. A communication method of a cluster system, comprising:
when a base station identifies that a user terminal related to a group exists in a cell of the base station, establishing a corresponding relation between the group and the related user terminal;
the establishing of the correspondence between the group and the related user terminal includes: the base station broadcasts a trunking paging message containing group information on a trunking paging channel;
receiving group information carried in the trunking paging message reported by a user terminal when the user terminal determines that the user terminal is related to the group information in the trunking paging message;
the group information contained in the trunking paging message is the group information corresponding to the trunking group call when the trunking group call is initiated by one user terminal belonging to one trunking system;
establishing a corresponding relation between the user terminal and a group corresponding to the group information;
when receiving group calling or multicast data of a group issued by a core network, scheduling the group calling or multicast data to user terminals corresponding to the group according to the corresponding relationship;
the scheduling the group call or multicast data to the user terminal corresponding to the group according to the corresponding relationship comprises: judging whether a group corresponding relation of group calling or multicast data exists; if yes, scheduling the group calling or the multicast data to the user terminal corresponding to the group; if not, not scheduling the group calling or multicast data;
the base station scheduling the group call or multicast data comprises:
the base station acquires the channel condition of the user terminal kept in a connection state;
determining a modulation coding mode adopted for scheduling the group calling or multicast data according to the channel condition;
scheduling the group calling or multicast data according to the determined modulation coding mode;
wherein the channel condition includes a channel quality status reported by the ue or a reference signal received power contained in a measurement report.
2. The communication method according to claim 1,
after the establishing of the corresponding relationship between the group and the related user terminal, the method further includes:
and the base station keeps the user terminal establishing the corresponding relation in a connection state.
3. The communication method according to claim 2,
the base station scheduling the group call or multicast data further comprises:
the base station acquires the user position of the user terminal kept in a connection state;
determining a resource block adopted for scheduling the group calling or multicast data according to the user position so as to schedule the group calling or multicast data;
the user position is the position of the user terminal in the cell determined by the base station according to the measurement report reported by the user terminal.
4. The communication method according to claim 1, wherein the receiving the group information reported by the ue comprises:
and the base station receives the measurement report message reported by the user terminal and acquires the group information carried in the measurement report message.
5. The communication method according to claim 1, further comprising, after the establishing the correspondence between the group and the related user terminal:
and when detecting that the user terminal with the established corresponding relation is in the off-line state, the base station releases the corresponding relation between the user terminal in the off-line state and the group.
6. The communication method according to claim 1, further comprising, after the establishing the correspondence between the group and the related user terminal:
and when the user terminal which establishes the corresponding relation with the group is identified to be related to another group, releasing the corresponding relation between the identified user terminal and the group, and establishing the corresponding relation between the identified user terminal and the other group, wherein the priority of the other group is higher than or equal to the priority of the group.
7. A communications apparatus of a cluster system, comprising:
the system comprises an establishing module, a judging module and a judging module, wherein the establishing module is used for establishing a corresponding relation between a group and a related user terminal when a base station identifies that the user terminal related to the group exists in a cell of the base station;
the establishing of the correspondence between the group and the related user terminal includes:
the base station broadcasts a trunking paging message containing group information on a trunking paging channel;
receiving group information carried in the trunking paging message reported by a user terminal when the user terminal determines that the user terminal is related to the group information in the trunking paging message;
the group information contained in the trunking paging message is the group information corresponding to the trunking group call when the trunking group call is initiated by one user terminal belonging to one trunking system;
establishing a corresponding relation between the user terminal and a group corresponding to the group information;
the scheduling module is used for scheduling the group calling or the multicast data to the user terminals corresponding to the group according to the corresponding relation when receiving the group calling or the multicast data of the group issued by the core network;
the base station scheduling the group call or multicast data comprises:
the base station acquires the channel condition of the user terminal kept in a connection state;
determining a modulation coding mode adopted for scheduling the group calling or multicast data according to the channel condition;
scheduling the group calling or multicast data according to the determined modulation coding mode;
wherein, the channel condition includes the channel quality status reported by the user terminal or the reference signal receiving power contained in the measurement report;
the scheduling the group call or multicast data to the user terminal corresponding to the group according to the corresponding relationship comprises: judging whether a group corresponding relation of group calling or multicast data exists; if yes, scheduling the group calling or the multicast data to the user terminal corresponding to the group; if not, not scheduling the group calling or multicast data.
8. A base station comprising a processor, a receiver, a transmitter, and a memory;
the memory for storing a computer program configured to be executed by the processor;
the processor executes the computer program to:
when identifying that a user terminal related to a group exists in a cell of the base station, establishing a corresponding relation between the group and the related user terminal;
the processor executing the establishment of the corresponding relationship between the group and the related user terminal specifically includes:
the base station broadcasts a trunking paging message containing group information on a trunking paging channel;
receiving group information carried in the trunking paging message reported by a user terminal when the user terminal determines that the user terminal is related to the group information in the trunking paging message;
the group information contained in the trunking paging message is the group information corresponding to the trunking group call when the trunking group call is initiated by one user terminal belonging to one trunking system;
establishing a corresponding relation between the user terminal and a group corresponding to the group information;
when the receiver receives group calling or multicast data of a group issued by a core network, the group calling or multicast data is scheduled according to the corresponding relation and then is sent to the user terminal corresponding to the group through the sender;
the scheduling the group call or multicast data according to the corresponding relationship, and then sending the group call or multicast data to the user terminal corresponding to the group through the sender comprises: judging whether a group corresponding relation of group calling or multicast data exists; if yes, scheduling the group calling or the multicast data to the user terminal corresponding to the group; if not, not scheduling the group calling or multicast data;
the processor executes the scheduling of the group call or multicast data, specifically including:
acquiring the channel condition of the user terminal kept in a connection state;
determining a modulation coding mode adopted for scheduling the group calling or multicast data according to the channel condition;
scheduling the group calling or multicast data according to the determined modulation coding mode;
wherein the channel condition includes a channel quality status reported by the ue or a reference signal received power contained in a measurement report.
9. The base station of claim 8,
after the processor performs the establishing of the correspondence between the group and the related user terminal, the method includes:
the processor keeps the user terminal establishing the corresponding relation in a connection state;
the processor executes the scheduling of the group call or multicast data, specifically including:
acquiring the channel condition of the user terminal kept in a connection state;
determining a modulation coding mode adopted for scheduling the group calling or multicast data according to the channel condition;
scheduling the group calling or multicast data according to the determined modulation coding mode;
wherein the channel condition includes a channel quality status reported by the ue or a reference signal received power contained in a measurement report.
10. The base station of claim 8, wherein the processor performs the receiving of the group information reported by the ue through the receiver, comprising:
and the processor receives the measurement report message reported by the user terminal through the receiver and acquires the group information carried in the measurement report message.
11. The base station of claim 8, wherein the processor, after performing the establishing the correspondence between the group and the related ue, further comprises:
and when detecting that the user terminal with the established corresponding relation is in a offline state, the processor releases the corresponding relation between the user terminal in the offline state and the group.
12. The base station of claim 8, wherein the processor, after performing the establishing the correspondence between the group and the related ue, further comprises:
and when the user terminal which establishes the corresponding relation with the group is identified to be related to another group, releasing the corresponding relation between the identified user terminal and the group, and establishing the corresponding relation between the identified user terminal and the other group, wherein the priority of the other group is higher than or equal to the priority of the group.
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