CN110505589B

CN110505589B - Cluster communication method, device, scheduling machine, terminal and system

Info

Publication number: CN110505589B
Application number: CN201810470371.4A
Authority: CN
Inventors: 黄杨晖; 高红梅
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2018-05-16
Filing date: 2018-05-16
Publication date: 2021-10-15
Anticipated expiration: 2038-05-16
Also published as: CN110505589A

Abstract

The embodiment of the invention provides a cluster communication method, a cluster communication device, a dispatching machine, a terminal and a cluster communication system. The method comprises the following steps: and sending a group establishment notification message according to the group establishment request message, wherein the group establishment notification message comprises a group identifier of the group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler and used for multicast sending of group data on the multicast channel corresponding to the TMGI. The method of the embodiment of the invention does not send the TBCP connection message to the group user in a unicast way when the group is established, thereby not only reducing the time delay of group establishment and avoiding the generation of signaling storm, but also saving the resource of a dispatching system and improving the reliability of cluster communication.

Description

Cluster communication method, device, scheduling machine, terminal and system

Technical Field

The embodiment of the invention relates to a cluster communication technology, in particular to a cluster communication method, a cluster communication device, a dispatching machine, a terminal and a cluster communication system.

Background

The trunking communication service refers to a trunking communication common network formed by trunking communication systems with the technical characteristics of channel sharing, dynamic allocation and the like, and provides communication services such as special command scheduling and the like for group users of multiple departments, units and the like. The trunking communication system is a multi-purpose and high-performance wireless dispatching communication system for sharing resources, sharing cost, sharing channel equipment and services, is an advanced mobile dispatching system, and represents a development direction of a special mobile communication network which is one of communication systems.

With the continuous development of Communication technology, private network Communication based on Group Communication support System (GCSE) is widely used, and GCSE is proposed by the third Generation Partnership Project (3rd Generation Partnership Project, abbreviated as 3 GPP). In a 3GPP GCSE cluster architecture, a Multicast Broadcast Single Frequency Network (MBSFN) -based Push To Talk (PTT) Service implements a group Service by using a Multimedia Broadcast Multicast Service (MBMS). According to the specification of 3GPP Protocol 24380, when implementing a group service using MBMS, a scheduler first needs to send a notification message for group multicast establishment on a signaling multicast channel, and also needs to send a connection (Connect) message in Talk Burst Control Protocol (TBCP) to users in a group in a unicast manner, so as to bind the group with a user plane for which an SIP session is pre-established, and then send group data on a downlink multicast channel.

The number of users of a multicast group is theoretically infinite, and is not limited by the air interface capacity of a cell, for professional cluster users, such as a public safety part, the number of users of the group may reach thousands, and the establishment and release of the group are very frequent, and the activation time is generally about 20 to 30 seconds. Therefore, according to the specification of 3GPP protocol 24380, when a group is established, a TBCP Connect message is unicast-transmitted to a large number of users at the same time, which not only causes a signaling storm to the air interface, including a paging storm and an air interface signaling access storm, and affects the services of other users, but also brings a large signaling transmission load to the scheduler, wastes scheduling system resources, and may affect the operation of other modules of the system.

Disclosure of Invention

The embodiment of the invention provides a trunking communication method, a trunking communication device, a dispatcher, a terminal and a trunking communication system, which are used for solving the problems that a signaling storm can be generated and the signaling sending load of the dispatcher is large in the prior art.

In a first aspect, an embodiment of the present invention provides a cluster communication method, applied to a scheduler, including:

sending a Group establishment notification message according to the Group establishment request message, wherein the Group establishment notification message comprises a Group identifier of the Group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the Group to be established, and the TMGI is allocated by the scheduler;

and multicast sending the group data on a multicast channel corresponding to the TMGI.

In a possible implementation manner of the first aspect, the method further includes:

receiving a speaking right application message sent by a terminal;

sending a first response message to the terminal, wherein the first response message carries speaking right granting indication information;

sending a Talk Burst Control Protocol (TBCP) connection message to the terminal, wherein the TBCP connection message is used for indicating the terminal to bind the pre-established session and the group;

receiving a second response message sent by the terminal, wherein the second response message is a response to the TBCP connection message;

sending a speaking right granting message to the terminal, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group;

and receiving the group data sent by the terminal in a unicast way.

In another possible implementation manner of the first aspect, the method further includes:

receiving status report information sent by a terminal, wherein the status report information is used for indicating that the terminal cannot correctly receive group data on a multicast channel;

receiving a third response message sent by the terminal, wherein the third response message is a response to the TBCP connection message;

and unicast-sending the group data to the terminal on the bearer of the session.

In a second aspect, an embodiment of the present invention provides a trunking communication method, which is applied to a terminal, and includes:

receiving a group establishment notification message sent by a scheduler, wherein the group establishment notification message comprises a group identifier of a group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler;

and if the terminal belongs to the group identified by the group identification, receiving the group data sent by the dispatcher on a multicast channel corresponding to the TMGI.

In one possible implementation manner of the second aspect, the method further includes:

sending a speaking right application message to a dispatcher;

receiving a first response message sent by a dispatching machine, wherein the first response message carries speaking right granting indication information;

receiving a Talk Burst Control Protocol (TBCP) connection message sent by a dispatcher, and binding a pre-established session and a group according to the TBCP connection message;

transmitting a second response message to the scheduler, the second response message being a response to the TBCP connect message;

receiving a speaking right granting message sent by a dispatching machine, wherein the speaking right granting message is used for indicating a terminal to successfully acquire the speaking right of a group;

and unicast-sending the group data to the dispatcher.

In another possible implementation manner of the second aspect, the method further includes:

sending status report information to a dispatcher, wherein the status report information is used for indicating that a terminal cannot correctly receive group data on a multicast channel;

transmitting a third response message to the scheduler, the third response message being a response to the TBCP connect message;

and receiving the group data sent by the dispatcher in a unicast mode on the bearer of the session.

In a third aspect, an embodiment of the present invention provides a trunking communication apparatus, including:

a sending module, configured to send a group establishment notification message according to the group establishment request message, where the group establishment notification message includes a group identifier of the group to be established and a temporary mobile group identifier TMGI of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler;

and the sending module is also used for multicast sending of the group data on the multicast channel corresponding to the TMGI.

In a fourth aspect, an embodiment of the present invention provides a trunking communication apparatus, including:

the receiving module is used for receiving a group establishment notification message sent by the scheduler, wherein the group establishment notification message comprises a group identifier of a group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler;

and the receiving module is further configured to receive, on a multicast channel corresponding to the TMGI, group data sent by the scheduler if the group communication apparatus belongs to the group identified by the group identifier.

In a fifth aspect, an embodiment of the present invention provides a scheduler, including:

a memory;

a processor; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method according to any of the first aspect.

In a sixth aspect, an embodiment of the present invention provides a terminal, including:

a memory;

a processor; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method according to any of the second aspect.

In a seventh aspect, an embodiment of the present invention provides a trunking communication system, including: a scheduler as provided in the fifth aspect, a terminal and a network device as provided in the sixth aspect.

In an eighth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, the computer program being executed by a processor to implement the method according to any one of the first aspect.

In a ninth aspect, the present invention provides a computer readable storage medium, on which a computer program is stored, the computer program being executed by a processor to implement the method according to any one of the second aspect.

According to the trunking communication method, the trunking communication device, the dispatching machine, the terminal and the trunking communication system provided by the embodiment of the invention, the dispatching machine sends the group establishment notification message according to the group establishment request message, wherein the group establishment notification message comprises the group identification of the group to be established and the Temporary Mobile Group Identification (TMGI) of the multicast channel of the group to be established, so that group users can monitor group data on the multicast channel of the group, and then multicast and send the group data on the multicast channel corresponding to the TMGI, thereby reducing the time delay of group establishment and realizing the rapid establishment of the multicast group. When a group is established, the TBCP connection message is not sent to the group user in a unicast mode, so that the generation of a signaling storm is avoided, the resource of a scheduling system is saved, and the reliability of cluster communication is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a cluster architecture of a GCSE;

fig. 2 is a flowchart of an embodiment of a trunking communication method provided by the present invention;

fig. 3 is a flowchart of a cluster communication method according to another embodiment of the present invention;

fig. 4 is a flowchart of another embodiment of a cluster communication method provided by the present invention;

fig. 5 is a flowchart of a cluster communication method according to another embodiment of the present invention;

fig. 6 is a flowchart of another embodiment of a cluster communication method provided by the present invention;

fig. 7 is a flowchart of a cluster communication method according to another embodiment of the present invention;

fig. 8 is a signaling flowchart of an embodiment of a trunking communication method provided by the present invention;

fig. 9 is a signaling flowchart of a cluster communication method according to another embodiment of the present invention;

fig. 10 is a signaling flowchart of another embodiment of a trunking communication method provided by the present invention;

FIG. 11 is a schematic structural diagram of an embodiment of a dispatcher;

fig. 12 is a schematic structural diagram of an embodiment of a terminal provided in the present invention;

fig. 13 is a schematic structural diagram of an embodiment of a trunking communication system provided in the present invention.

With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The terms "first" and "second" in the present application are used for identification purposes only and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. "plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

FIG. 1 is a schematic diagram of a cluster architecture of GCSE. As shown in fig. 1, the 3GPP GCSE cluster architecture includes: user Equipment (User Equipment, abbreviated to UE), Evolved node b (eNB), Multi-cell/Multicast Coordination Entity (MCE), Mobility Management Entity (MME), Multimedia Broadcast Multicast Service Gateway (MBMS GW), Broadcast Multicast Service Center (BM-SC), Packet Data Gateway (P-GW), and GCSE Application Server (GCSE Application Server, abbreviated to gcas). The eNB and the MCE form an Evolved Universal Terrestrial Radio Access Network (E-UTRAN for short). Specifically, the UE accesses core network equipment through the E-UTRAN and communicates with the GCSE AS. The GCSE AS may be a scheduler.

Fig. 2 is a flowchart of an embodiment of a cluster communication method provided in the present invention. The method provided by the embodiment can be applied to dispatchers, PTT servers and the like. As shown in fig. 2, the method of this embodiment may include:

step S201, sending a group establishment notification message according to the group establishment request message, where the group establishment notification message includes a group identifier of the group to be established and a temporary mobile group identifier TMGI of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler.

The multicast channel in this embodiment is pre-established by the scheduler. Specifically, the scheduling opportunity pre-establishes a certain number of multicast channels for transmitting group voice and group signaling in each Service Area (SA) according to an algorithm, so that the multicast channels under different SAs can be flexibly bound when a group is established. The embodiment does not limit the specific algorithm used for pre-establishing the multicast channel, and the multicast channel may be pre-established in a static, semi-static or dynamic manner. After the multicast channel is established, all terminals need to be notified of the information of the MBMS multicast channel pre-established in the current whole network, and for the TMGI information of the signaling multicast channel, an Internet Protocol (IP) address and a port of the multicast channel need to be set, so that the terminals monitor the group establishment notification message on the signaling multicast channel.

The terminal in this embodiment is a terminal pre-established by a Session Initiation Protocol (SIP). When the SIP session is pre-established, the terminal and the dispatcher negotiate media information parameters, such as voice coding format, user plane IP address, port, etc., for subsequent group talkback service and group unicast service. Meanwhile, after negotiation, the scheduler triggers bearer establishment of the QCI1 of the Rx interface, and the priority adopts the subscription priority of the end user.

It should be noted that the group establishment request message may be sent by the main terminal or may be generated by the scheduler. And when the group establishment condition is met, the dispatcher sends a group establishment notification message, wherein the group establishment notification message comprises a group identifier of the group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the group to be established, and the TMGI is allocated by the dispatcher. Specifically, when the Group is established, the scheduler sends and receives a Map Group To router message of the TBCP on the signaling multicast channel To perform broadcast, and notifies the multicast Group establishment, so that the monitoring terminal monitors the multicast Group data on the corresponding TMGI according To the information carried in the message.

Step S202, multicast sending group data on the multicast channel corresponding to the TMGI.

And multicast sending the group data of the group on the multicast channel allocated to the group, so that the terminals monitoring the multicast channel can obtain the group data. The multicast channel may be an MBMS multicast channel.

It should be particularly emphasized that, according to the specification of 3GPP protocol 24380, even if the group data is delivered through the MBMS multicast channel, the terminal supports multicast reception, and for the SIP pre-established terminal, the TBCP Connect message still needs to be delivered to bind the group and the pre-established SIP session user plane for carrying the subsequent transmission and reception of the preemption message and carrying the group unicast voice data after the subsequent multicast switching. That is, as specified in 3GPP protocol 24380, after step S201 and before step S202 in this embodiment, the scheduler needs to unicast a TBCP Connect message to all group users of the group.

The number of users in a multicast group is theoretically infinite, and is not limited by the air interface capacity of a cell, and for professional cluster users, such as a public safety part, the number of users in a group may reach thousands. When a group is established, the dispatcher unicast sends a TBCP Connect message to thousands of users at the same time, receives response messages of thousands of users, and not only can cause signaling storms to an air interface, including paging storms and air interface signaling access storms, to influence services of other users, but also can bring a large signaling sending load to the dispatcher, waste dispatching system resources, and possibly influence the operation of other modules of the system. More seriously, sending a large amount of TBCP Connect messages may cause an increase in group establishment delay, possibly cause an information loss problem, cause a decrease in communication reliability, and fail to meet user requirements.

The TBCP Connect message is used to instruct the terminal to bind the group with the pre-established SIP session user plane, so as to carry the subsequent preemption message sending and receiving and/or carry the subsequent multicast unicast group unicast voice data. However, the establishment and release of the group is very frequent, typically with an activation time of around 20-30 seconds. There is a high probability that no preemption or multicast to unicast switching will occur for the duration of the group. Therefore, the TBCP Connect message may not be transmitted at the group establishment.

In the trunking communication method provided in this embodiment, the scheduler sends a group establishment notification message according to the group establishment request message, where the group establishment notification message includes a group identifier of the group to be established and a temporary mobile group identifier TMGI of a multicast channel of the group to be established, so that a group user monitors group data on the multicast channel of the group, and then multicast and sends the group data on the multicast channel corresponding to the TMGI, thereby reducing a time delay of group establishment and achieving fast establishment of a multicast group. When a group is established, the TBCP connection message is not sent to the group user in a unicast mode, so that the generation of a signaling storm is avoided, the resource of a scheduling system is saved, and the reliability of cluster communication is improved.

On the basis of the above embodiment, several specific embodiments are respectively adopted below, and detailed description is made for the preemption flow and the multicast-unicast switching flow after group establishment.

Fig. 3 is a flowchart of a cluster communication method according to another embodiment of the present invention. As shown in fig. 3, on the basis of the embodiment of the method shown in fig. 2, the method of this embodiment may further include:

and step S301, receiving a speaking right application message sent by the terminal.

After the group is established, the monitoring terminals in the group monitor the group data on the multicast channel of the group. When the monitoring terminals in the group want to talk, the monitoring terminals need to send a speaking right application message to the dispatcher to apply for becoming the main speaking terminal. Specifically, the terminal may apply for the talk burst through the SIP REFER message with the talk burst application indication.

The dispatcher receives the speaking right application message sent by the terminal, the terminal can be any monitoring terminal in the group, and the dispatcher can also simultaneously receive the speaking right application messages sent by a plurality of terminals.

Step S302, a first response message is sent to the terminal, and the first response message carries the speaking right granting indication information.

After receiving the speaking right application message sent by the terminal, the dispatching machine sends a first response message carrying speaking right grant indication information to the terminal which meets the condition and can obtain the speaking right. Specifically, a 200OK message carrying the talk right grant indication information may be sent to the terminal.

When a plurality of terminals send the speaking right application message simultaneously, only one terminal can obtain the speaking right, and the speaking right can be determined according to the priority of the terminal. For the terminal which fails in speaking right application, the dispatcher sends a 200OK message without speaking right grant to the terminal, then sends a Floor Deny message to reject speaking right application, and finishes the right grabbing flow of the terminal. There are many reasons for the failure of the speaking right application, which are not described herein.

Step S303, sending a Talk Burst Control Protocol (TBCP) connection message to the terminal, wherein the TBCP connection message is used for indicating the terminal to bind the pre-established session and the group.

When the group is established, the pre-established session and the group are not bound, and after the dispatcher determines that the talk right is granted, the dispatcher needs to send a Talk Burst Control Protocol (TBCP) connection message to the terminal which is about to obtain the talk right, wherein the TBCP connection message is used for indicating the terminal to bind the pre-established session and the group.

Step S304, receiving a second response message sent by the terminal, where the second response message is a response to the TBCP connect message.

And receiving a second response message sent by the terminal, wherein the second response message is a response to the TBCP connection message. Specifically, the second response message is sent to the scheduler after the terminal receives the TBCP connect message sent by the scheduler and binds the pre-established session and the group according to the TBCP connect message.

And step S305, sending a speaking right granting message to the terminal, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group.

And after receiving the second response message, the dispatcher sends a speaking right granting message to the terminal, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group, so that the terminal becomes a main speaking terminal and can speak. Specifically, the terminal may be indicated by a TBCP Floor Granted message. Meanwhile, the scheduler sends the talk right occupation indication information to other terminals in the group, specifically, the talk right occupation indication information can be indicated through a TBCP Floor token message.

And step S306, receiving the group data sent by the terminal in a unicast mode.

Once the speaking right application is successful, the terminal becomes a main speaking terminal, the uplink unicast sends group data, and the group downlink unicast or multicast channel is not received any more. And the dispatcher receives the group data unicast-sent by the terminal and multicast-sends the group data to the group users on a multicast channel.

For example, for a group with 1000 group users, if only one preemption happens during the group duration, the scheduler in the prior art unicast-transmits 1000 TBCP Connect messages during group establishment, but the method provided by this embodiment unicast-transmits only 1 TBCP Connect message, thereby avoiding signaling storm, saving resources, and really achieving on-demand transmission.

In the trunking communication method provided in this embodiment, when the dispatcher establishes a group, the dispatcher does not unicast a TBCP connection message to the group users, and in the preemption process, the dispatcher only sends a TBCP connection message to the terminal that is about to obtain the talk right, which is used to instruct the terminal to bind the pre-established session and the group, and receive the group data unicast by the terminal on the bearer of the session, thereby implementing the talk right application, avoiding signaling storm, saving resources, and really achieving on-demand transmission.

Fig. 4 is a flowchart of another embodiment of a cluster communication method provided in the present invention. As shown in fig. 4, on the basis of the embodiment of the method shown in fig. 2, the method of this embodiment may further include:

step S401, receiving status report information sent by the terminal, where the status report information is used to indicate that the terminal cannot correctly receive the group data on the multicast channel.

The terminal monitors the group data on the multicast channel, and when the terminal cannot correctly receive the group data on the multicast channel, the terminal sends the state report information to the dispatcher. For example, when the terminal determines that the quality of the multicast channel is poor or group data cannot be received through a Real-time Transport Protocol (RTP) voice quality detection algorithm, the terminal reports an MBMS triggering status report message to indicate that the current group voice TMGI cannot be received.

Step S402, sending a Talk Burst Control Protocol (TBCP) connection message to the terminal, wherein the TBCP connection message is used for indicating the terminal to bind the pre-established session and the group.

After receiving the status report information sent by the terminal, the scheduler needs to switch the communication between the terminal and the scheduler from multicast to unicast to ensure that the terminal can correctly receive the group data. Since the pre-established session and the group are not bound when the group is established, a talk burst control protocol TBCP connection message is required to be sent to the terminal, and the TBCP connection message is used to instruct the terminal to bind the pre-established session and the group.

Step S403, receiving a third response message sent by the terminal, where the third response message is a response to the TBCP connect message.

And receiving a third response message sent by the terminal, wherein the third response message is a response to the TBCP connection message. Specifically, the third response message is sent to the scheduler after the terminal receives the TBCP connect message sent by the scheduler and binds the pre-established session and the group according to the TBCP connect message.

Step S404, sending the group data to the terminal in a unicast way on the bearing of the session.

After receiving the third response message, the scheduler may unicast the group data to the terminal on the bearer of the session.

For example, for a group with 1000 group users, if only 5 terminals need to switch from multicast to unicast during the group duration, the scheduler in the prior art unicast transmits 1000 TBCP Connect messages during group establishment, whereas the method provided by this embodiment unicast transmits only 5 TBCP Connect messages, thereby avoiding signaling storm, saving resources, and really achieving on-demand transmission.

In the trunking communication method provided in this embodiment, when the scheduler establishes a group, the scheduler does not send a TBCP connection message to a group user in a unicast manner, and only sends the TBCP connection message to a terminal that needs to be switched from a multicast to a unicast, so as to instruct the terminal to bind a pre-established session and a group, and send group data to the terminal in a unicast manner on a bearer of the session, thereby implementing a switch from a multicast to a unicast, avoiding a signaling storm, saving resources, and really achieving sending on demand.

Fig. 5 is a flowchart of a cluster communication method according to another embodiment of the present invention. The method provided by this embodiment may be applied to a terminal, as shown in fig. 5, and the method may include:

step S501, receiving a group establishment notification message sent by the scheduler, where the group establishment notification message includes a group identifier of a group to be established and a temporary mobile group identifier TMGI of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler.

Step S502, if the terminal belongs to the group identified by the group identification, the group data sent by the dispatcher is received on the multicast channel corresponding to the TMGI.

In the trunking communication method provided in this embodiment, after receiving the group establishment notification message sent by the scheduler, the terminal determines whether the terminal belongs to the group according to the group identifier in the group establishment notification message, and if the terminal belongs to the group, receives the group data sent by the scheduler on the multicast channel corresponding to the TMGI, thereby implementing fast establishment of the multicast group. When the group is established, the TBCP connection response message is not sent to the dispatcher any more, so that the terminal resources are saved, the air interface signaling access storm is avoided, and the reliability of the cluster communication is improved.

Fig. 6 is a flowchart of another embodiment of a cluster communication method provided in the present invention. As shown in fig. 6, on the basis of the embodiment of the method shown in fig. 5, the method of this embodiment may further include:

step S601, sending a speaking right application message to the dispatcher.

Step S602, receiving a first response message sent by the dispatcher, wherein the first response message carries speaking right granting indication information.

Step S603, receiving a talk burst control protocol TBCP connection message sent by the dispatcher, and binding the pre-established session and the group according to the TBCP connection message.

Step S604, sending a second response message to the scheduler, where the second response message is a response to the TBCP connect message.

And step S605, receiving a speaking right granting message sent by the dispatcher, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group.

Step S606, sending the group data to the dispatcher in a unicast mode.

In the trunking communication method provided in this embodiment, only after obtaining the right to speak, the terminal binds the pre-established session and the group according to the TBCP connection message sent by the dispatcher, and sends group data to the dispatcher in a unicast manner on the bearer of the session, so as to implement the right to speak application, and become the main speaking terminal.

Fig. 7 is a flowchart of a cluster communication method according to another embodiment of the present invention. As shown in fig. 7, on the basis of the embodiment of the method shown in fig. 5, the method of this embodiment may further include:

step S701, sending status report information to the scheduler, where the status report information is used to indicate that the terminal cannot correctly receive the group data on the multicast channel.

Step S702, receiving the talk burst control protocol TBCP connection message sent by the dispatcher, and binding the pre-established session and the group according to the TBCP connection message.

Step S703 is sending a third response message to the scheduler, where the third response message is a response to the TBCP connect message.

Step S704, receiving the group data unicast-transmitted by the scheduler on the bearer of the session.

At this time, the terminal may simultaneously and concurrently receive unicast and multicast channel data of the current group. When the terminal detects that the MBMS multicast quality is recovered and the multicast is stable for a period of time, the terminal can Report a Listing Status Report to the scheduler and indicate the scheduler to descend and not send unicast group data to the terminal. The terminal continues to normally receive MBMS multicast channel data.

In the trunking communication method provided in this embodiment, only when a terminal needs to switch from multicast to unicast, the terminal binds a pre-established session and a group according to a TBCP connection message sent by a scheduler, receives group data sent by the scheduler in unicast on a bearer of the session, and implements switching from multicast to unicast so as to correctly receive the group data.

Fig. 8 is a signaling flowchart of a trunking communication method according to an embodiment of the present invention. As shown in fig. 8, the trunking communication method provided in this embodiment includes:

step S801, the scheduling machine generates a group establishment notification message according to the group establishment request message.

A multicast channel pre-establishment procedure and a SIP session pre-establishment procedure may be further included before step S801, which is not limited in this embodiment. The group establishment request message may be sent by the main terminal or may be generated by the dispatcher. The group establishment notification message may include a group identification of the group to be established and a TMGI of a multicast channel of the group to be established.

Step S802, the dispatcher sends a group establishment notification message on a signaling multicast channel.

For example, a Map Group To router message of the TBCP is sent and received on the signaling multicast channel To notify the multicast Group establishment, so that the monitoring terminal monitors the multicast Group data on the corresponding TMGI according To the information carried in the message.

Step S803, the terminal receives the group establishment notification message, determines whether the terminal belongs to the group according to the group identifier in the group establishment notification message, and monitors the group data on the multicast channel if the terminal belongs to the group.

Step S804, the dispatcher sends the group data on the multicast channel.

And the dispatcher multicasts and sends the group data of the group on the multicast channel distributed for the group, so that the terminal monitoring the multicast channel can obtain the group data. The multicast channel may be an MBMS multicast channel.

Step S805, the terminal receives the group data.

And the terminal receives the group data sent by the dispatcher on a corresponding multicast channel.

Fig. 9 is a signaling flowchart of a cluster communication method according to another embodiment of the present invention. As shown in fig. 9, the trunking communication method provided in this embodiment includes:

step S901, the terminal sends a speaking right application message to the dispatcher.

For example, the terminal may initiate a talk burst application using a SIP REFER message with a talk burst application indication.

Step S902, the dispatcher sends a first response message carrying the talk right grant indication information to the terminal.

For example, the dispatcher sends a 200OK message carrying the talk right grant indication information to the terminal.

Step S903, the dispatcher sends a TBCP connection message to the terminal.

And the dispatcher sends a TBCP Connect message to the terminal for indicating the terminal to bind the pre-established session and the group.

Step S904, the terminal binds the pre-established session and the group according to the TBCP connect message.

And step S905, the terminal sends a second response message to the dispatcher.

For example, the terminal transmits a TBCP ACK message to the scheduler in response to the TBCP Connect message.

Step S906, the dispatcher sends a speaking right granting message to the terminal.

For example, the scheduler transmits a TBCP Floor Granted message to the terminal for instructing the terminal to successfully acquire the speaking right of the group. Meanwhile, the scheduler sends the right-of-speech occupation indication information, for example, a TBCP Floor Taken message to other terminals in the group.

Step S907, the terminal unicast-transmits the group data to the scheduler.

The terminal successfully acquires the speaking right to become a main speaking terminal, and unicast-transmits group data to the dispatcher on the bearing of the session.

In this embodiment, only the signaling flow in which the speaking right application is successful is shown, and for the case that the speaking right application fails, after step S901, the dispatcher sends a 200OK message without speaking right grant indication information to the terminal, and then sends a TBCP Floor Deny message to reject the speaking right application of the terminal, and the speaking right application flow is ended.

Fig. 10 is a signaling flowchart of another embodiment of a cluster communication method provided in the present invention. As shown in fig. 10, the trunking communication method provided in this embodiment includes:

step S1001, when the terminal cannot correctly receive the group data on the multicast channel, generates corresponding status report information. The status report information is used to indicate that the terminal cannot correctly receive the group data on the multicast channel.

Step S1002, the terminal sends status report information to the scheduler.

Step S1003, the dispatcher transmits a TBCP connect message to the terminal.

Step S1004, the terminal binds the pre-established session and the group according to the TBCP connect message.

Step S1005, the terminal sends a third response message to the scheduler. The third response message is a response to the TBCP connect message.

Step S1006, the dispatcher unicast-transmits the group data to the terminal on the session bearer.

And then, the terminal receives the group data sent by the dispatcher in a unicast mode on the unicast channel, and switching from multicast to unicast is realized.

An embodiment of the present invention further provides a trunking communication apparatus, where the trunking communication apparatus provided in this embodiment may be a scheduler, and may also be a component (e.g., an integrated circuit, a chip, etc.) used in the scheduler, and the trunking communication apparatus includes:

and the sending module is used for sending a Group establishment notification message according to the Group establishment request message, wherein the Group establishment notification message comprises a Group identifier of the Group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the Group to be established, and the TMGI is allocated by the scheduling machine.

The trunking communication apparatus provided in this embodiment may be used to execute the technical solution of the method embodiment corresponding to fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.

In one possible implementation, the apparatus further includes a receiving module.

And the receiving module is used for receiving the speaking right application message sent by the terminal.

And the sending module is further used for sending a first response message to the terminal, wherein the first response message carries the speaking right granting indication information.

And the sending module is further used for sending a Talk Burst Control Protocol (TBCP) connection message to the terminal, wherein the TBCP connection message is used for indicating the terminal to bind the pre-established session and the group.

And the receiving module is further configured to receive a second response message sent by the terminal, where the second response message is a response to the TBCP connect message.

The sending module is also used for sending a speaking right granting message to the terminal, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group;

and the receiving module is also used for receiving the group data sent by the terminal in a unicast way.

The trunking communication apparatus provided in this embodiment may be used to execute the technical solution of the method embodiment corresponding to fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.

In one possible implementation form of the method,

the receiving module is further configured to receive status report information sent by the terminal, where the status report information is used to indicate that the terminal cannot correctly receive the group data on the multicast channel.

And the receiving module is further configured to receive a third response message sent by the terminal, where the third response message is a response to the TBCP connect message.

And the sending module is further used for sending the group data to the terminal in a unicast mode on the bearing of the session.

The trunking communication apparatus provided in this embodiment may be used to execute the technical solution of the method embodiment corresponding to fig. 4, and the implementation principle and the technical effect are similar, which are not described herein again.

An embodiment of the present invention further provides a trunking communication apparatus, where the trunking communication apparatus provided in this embodiment may be a terminal, and may also be a component (e.g., an integrated circuit, a chip, or the like) used in the terminal, and the trunking communication apparatus includes:

and the receiving module is used for receiving a group establishment notification message sent by the scheduler, wherein the group establishment notification message comprises a group identifier of the group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler.

And the receiving module is further configured to receive, on a multicast channel corresponding to the TMGI, the group data sent by the scheduler if the terminal belongs to the group identified by the group identifier.

The trunking communication apparatus provided in this embodiment may be used to execute the technical solution of the method embodiment corresponding to fig. 5, and the implementation principle and the technical effect are similar, which are not described herein again.

In one possible implementation, the apparatus further includes a sending module.

And the sending module is used for sending the speaking right application message to the dispatcher.

The receiving module is further configured to receive a first response message sent by the scheduler, where the first response message carries the talk right grant indication information.

And the receiving module is also used for receiving the talk burst control protocol TBCP connection message sent by the dispatcher and binding the pre-established session and the group according to the TBCP connection message.

And the sending module is further used for sending a second response message to the dispatcher, wherein the second response message is a response to the TBCP connection message.

And the receiving module is also used for receiving a speaking right granting message sent by the dispatching machine, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group.

And the sending module is also used for sending the group data to the dispatcher in a unicast way.

The trunking communication apparatus provided in this embodiment may be used to execute the technical solution of the method embodiment corresponding to fig. 6, and the implementation principle and the technical effect are similar, which are not described herein again.

In one possible implementation form of the method,

and the sending module is further used for sending status report information to the scheduler, wherein the status report information is used for indicating that the terminal cannot correctly receive the group data on the multicast channel.

And the sending module is further used for sending a third response message to the dispatcher, wherein the third response message is a response to the TBCP connection message.

And the sending module is also used for receiving the group data sent by the dispatcher in a unicast mode on the bearing of the session.

The trunking communication apparatus provided in this embodiment may be used to execute the technical solution of the method embodiment corresponding to fig. 7, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 11 is a schematic diagram of a scheduler, which is only illustrated in fig. 11, and the present invention is not limited thereto. Fig. 11 is a schematic structural diagram of an embodiment of a dispatcher. As shown in fig. 11, the dispatcher 110 provided in the present embodiment includes: memory 1101, processor 1102, and bus 1103. The bus 1103 is used to realize connection between the elements.

The memory 1101 stores a computer program, and the computer program can implement the technical solution of any one of the method embodiments of fig. 2 to 4 when executed by the processor 1102.

Wherein the memory 1101 and the processor 1102 are electrically connected, directly or indirectly, to enable data transfer or interaction. For example, the components may be electrically coupled to each other via one or more communication buses or signal lines, such as bus 1103. The memory 1101 stores a computer program for implementing the technical solution of any one of the method embodiments of fig. 2 to 4, and includes at least one software functional module that can be stored in the memory 1101 in the form of software or firmware, and the processor 1102 executes various functional applications and data processing by running the software program and the module stored in the memory 1101.

The Memory 1101 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 1101 is used for storing programs, and the processor 1102 executes the programs after receiving execution instructions. Further, the software programs and modules within the above-described storage 1101 may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.

The processor 1102 may be an integrated circuit chip having signal processing capabilities. The Processor 1102 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and so on. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. It will be appreciated that the configuration of FIG. 11 is merely illustrative and may include more or fewer components than shown in FIG. 11 or have a different configuration than shown in FIG. 11. The components shown in fig. 11 may be implemented in hardware and/or software.

Fig. 12 is a schematic view of a terminal provided in an embodiment of the present invention, which is only illustrated in fig. 12, and the embodiment of the present invention is not limited thereto. Fig. 12 is a schematic structural diagram of an embodiment of a terminal provided in the present invention. The terminal can be user equipment and is applied to a trunking communication system. As shown in fig. 12, the terminal provided in this embodiment may include one or more of the following components: processing component 1201, memory 1202, power component 1204, multimedia component 1206, audio component 1203, input/output (I/O) interface 1208, sensor component 1207, and communications component 1205.

The processing component 1201 generally controls the overall operation of the terminal, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 1201 may include one or more processors 12011 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 1201 can include one or more modules that facilitate interaction between the processing component 1201 and other components. For example, the processing component 1201 may include a multimedia module to facilitate interaction between the multimedia component 1206 and the processing component 1201.

The memory 1202 is configured to store various types of data to support operation at the terminal. Examples of such data include instructions for any application or method operating on the terminal, contact data, phonebook data, messages, pictures, videos, etc. The memory 1202 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. In this embodiment, the memory 1202 stores a computer program, and the computer program can be executed by the processor 12011 to implement the technical solutions of the method embodiments corresponding to fig. 5 to 7.

The power supply component 1204 provides power to the various components of the terminal. The power components 1204 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the terminal.

The multimedia component 1206 includes a screen providing an output interface between the terminal and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 1206 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the terminal is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

Audio component 1203 is configured to output and/or input audio signals. For example, the audio component 1203 includes a Microphone (MIC) configured to receive external audio signals when the terminal is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 1202 or transmitted via the communication component 1205. In this embodiment, a voice signal of a user performing voice control on a terminal may be collected through a microphone, and then sent to the cloud server through the communication component 1205. In some embodiments, audio component 1203 also includes a speaker for outputting audio signals. In this embodiment, the prompt information for the user may be played through the speaker.

The I/O interface 1208 provides an interface between the processing component 1201 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 1207 includes one or more sensors to provide various aspects of state assessment for the terminal. For example, the sensor component 1207 may detect an open/closed state of the terminal, a relative positioning of components, such as a display and keypad of the terminal, the sensor component 1207 may detect a change in position of the terminal or a component of the terminal, the presence or absence of user contact with the terminal, orientation or acceleration/deceleration of the terminal, and a change in temperature of the terminal. The sensor assembly 1207 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 1207 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1207 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 1205 is configured to facilitate communication between the terminal and other devices in a wired or wireless manner. In this embodiment, the communication component 1205 is used to implement interaction between the terminal and the cloud server. The terminal may access a wireless network based on a communication standard, such as WiFi, 2G, 3G, or 4G, or a combination thereof. In an exemplary embodiment, the communication component 1205 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1205 also includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 1202 comprising instructions, executable by the processor 12011 of the terminal to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

The terminal provided in this embodiment may be used to execute the technical solutions of the method embodiments corresponding to fig. 5 to fig. 7, and the implementation principles and technical effects are similar, which are not described herein again.

Fig. 13 is a block diagram of a trunking communication system according to an embodiment of the present invention, which is only illustrated in fig. 13, and the embodiment of the present invention is not limited thereto. Fig. 13 is a schematic structural diagram of an embodiment of a trunking communication system provided in the present invention. As shown in fig. 13, the trunking communication system 130 provided in this embodiment includes: terminal 1301, network equipment 1302 and dispatcher 1303. The terminal 1301 may adopt the terminal provided in the embodiment corresponding to fig. 12, and the trunking communication system 130 provided in this embodiment may include a plurality of terminals. Network devices 1302 may include access devices and core network devices. Scheduler 1303 may employ the scheduler provided in the embodiment corresponding to fig. 11.

The trunking communication system provided in this embodiment may be used to implement the technical solutions of the method embodiments corresponding to fig. 8 to fig. 10, and the implementation principles and technical effects are similar, and are not described herein again.

The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor, and may implement a technical solution of any one of the method embodiments in fig. 2 to fig. 4.

The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the technical solution of any one of the method embodiments in fig. 5 to 7.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cluster communication method is applied to a dispatcher and is characterized by comprising the following steps:

sending a group establishment notification message to a terminal according to the group establishment request message, wherein the group establishment notification message comprises a group identifier of a group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler; the terminal is a terminal which is about to obtain the speaking right in the right-robbing process or a terminal which needs to be switched from multicast to unicast;

multicast sending group data on a multicast channel corresponding to the TMGI;

the method further comprises the following steps:

receiving a speaking right application message sent by a terminal;

sending a Talk Burst Control Protocol (TBCP) connection message to the terminal, wherein the TBCP connection message is used for indicating the terminal to bind the pre-established session with the group;

receiving group data sent by the terminal unicast;

alternatively, the first and second electrodes may be,

receiving status report information sent by a terminal, wherein the status report information is used for indicating that the terminal cannot correctly receive group data on the multicast channel;

and unicast-sending group data to the terminal on the bearing of the session.

2. A cluster communication method is applied to a terminal, and is characterized by comprising the following steps:

receiving a group establishment notification message sent by a scheduler, wherein the group establishment notification message comprises a group identifier of a group to be established and a Temporary Mobile Group Identifier (TMGI) of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler; the terminal is a terminal which is about to obtain the speaking right in the right-robbing process or a terminal which needs to be switched from multicast to unicast;

if the terminal belongs to the group identified by the group identification, receiving the group data sent by the dispatcher on a multicast channel corresponding to the TMGI;

the method further comprises the following steps:

sending a speaking right application message to the dispatcher;

receiving a first response message sent by the dispatcher, wherein the first response message carries speaking right granting indication information;

receiving a Talk Burst Control Protocol (TBCP) connection message sent by the dispatcher, and binding the pre-established session with the group according to the TBCP connection message;

transmitting a second response message to the scheduler, the second response message being a response to the TBCP connection message;

receiving a speaking right granting message sent by the dispatching machine, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group;

unicast group data to the dispatcher;

alternatively, the first and second electrodes may be,

sending status report information to the scheduler, wherein the status report information is used for indicating that the terminal cannot correctly receive group data on the multicast channel;

transmitting a third response message to the scheduler, the third response message being a response to the TBCP connection message;

3. A group communication apparatus, comprising:

a sending module, configured to send a group establishment notification message to a terminal according to a group establishment request message, where the group establishment notification message includes a group identifier of a group to be established and a temporary mobile group identifier TMGI of a multicast channel of the group to be established, and the TMGI is allocated by a scheduler; the terminal is a terminal which is about to obtain the speaking right in the right-robbing process or a terminal which needs to be switched from multicast to unicast;

the sending module is further configured to multicast and send group data on a multicast channel corresponding to the TMGI;

the device also comprises a receiving module;

the receiving module is used for receiving a speaking right application message sent by the terminal;

the sending module is further used for sending a first response message to the terminal, wherein the first response message carries the speaking right granting indication information;

the sending module is further used for sending a Talk Burst Control Protocol (TBCP) connection message to the terminal, wherein the TBCP connection message is used for indicating the terminal to bind the pre-established session and the group;

the receiving module is further configured to receive a second response message sent by the terminal, where the second response message is a response to the TBCP connect message;

the receiving module is also used for receiving the group data sent by the terminal unicast;

alternatively, the first and second electrodes may be,

the receiving module is further configured to receive status report information sent by the terminal, where the status report information is used to indicate that the terminal cannot correctly receive group data on a multicast channel;

the receiving module is further configured to receive a third response message sent by the terminal, where the third response message is a response to the TBCP connect message;

4. A group communication apparatus, the apparatus being for a terminal, comprising:

a receiving module, configured to receive a group establishment notification message sent by a scheduler, where the group establishment notification message includes a group identifier of a group to be established and a temporary mobile group identifier TMGI of a multicast channel of the group to be established, and the TMGI is allocated by the scheduler; the terminal is a terminal which is about to obtain the speaking right in the right-robbing process or a terminal which needs to be switched from multicast to unicast;

the receiving module is further configured to receive, on a multicast channel corresponding to the TMGI, group data sent by the scheduler if the trunking communication apparatus belongs to the group identified by the group identifier;

the device also comprises a sending module;

the sending module is used for sending a speaking right application message to the dispatcher;

the receiving module is further used for receiving a first response message sent by the dispatcher, wherein the first response message carries the speaking right granting indication information;

the receiving module is also used for receiving the talk burst control protocol TBCP connection message sent by the dispatcher and binding the pre-established session and the group according to the TBCP connection message;

a sending module, configured to send a second response message to the scheduler, where the second response message is a response to the TBCP connect message;

the receiving module is also used for receiving a speaking right granting message sent by the dispatching machine, wherein the speaking right granting message is used for indicating the terminal to successfully acquire the speaking right of the group;

the sending module is also used for sending the group data to the dispatcher in a unicast way;

alternatively, the first and second electrodes may be,

the sending module is further used for sending status report information to the scheduler, wherein the status report information is used for indicating that the terminal cannot correctly receive the group data on the multicast channel;

a sending module, configured to send a third response message to the scheduler, where the third response message is a response to the TBCP connect message;

5. A dispatcher, comprising:

a memory;

a processor; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of claim 1.

6. A terminal, comprising:

a memory;

a processor; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of claim 2.

7. A group communication system, comprising:

network device, scheduler according to claim 5 and terminal according to claim 6.

8. A computer-readable storage medium, on which a computer program is stored which is executed by a processor to implement the method as claimed in claim 1.

9. A computer-readable storage medium, on which a computer program is stored which is executed by a processor to implement the method as claimed in claim 2.