WO2016192414A1

WO2016192414A1 - Group calling method and device in trunking communication system

Info

Publication number: WO2016192414A1
Application number: PCT/CN2016/073892
Authority: WO
Inventors: 熊明昭
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-06-04
Filing date: 2016-02-16
Publication date: 2016-12-08
Also published as: CN106304378A

Abstract

A group calling method and device in a trunking communication system are provided by the present invention. The group calling method comprises: receiving a handover request, transmitted by a scheduling server, for switching a target user with access to a group calling with a low priority to a group calling with a high priority, and the target user belongs to a low-priority-group corresponding to the group calling with the low priority, and a high-priority group corresponding to the group calling with the high priority simultaneously; and, according to whether the user in the low-priority-group speaks, transmitting corresponding traffic channel allocation information via a traffic channel of the group calling with the low priority, wherein the traffic channel allocation information carries traffic channel information of the group calling with the high priority, and group information of the high-priority-group, and the target user switchs to the group calling with the high priority when a group calling address saved by the target user is the same as a group calling address of the group calling with the high priority. With the present invention, integrity of a call of the group calling with the high priority in a PDF trunking communication system is ensured and user experience of the group calling with the high priority is improved.

Description

Group call method and device in trunking communication system

Technical field

The present invention relates to a digital trunking communication system, and more particularly to a group call method and apparatus in a trunking communication system.

Background technique

Cluster communication is an important branch of wireless communication, mainly used in the field of professional mobile communication. The cluster communication system based on the professional digital trunking PDT technology combines the time division multiple access TDMA technology with the dedicated dispatch communication system, which not only expands the service range of the cellular communication system, but also frees the trunk communication system from the function of the dedicated dispatch communication system. Regional limitations. The TDMA cluster system network consists of cluster terminals, base station systems, and scheduling servers.

Since the group of the cluster group calls has a high priority and a low priority, and one user is likely to belong to both the high priority group and the low priority group, when the user is connected to the low priority After a group, if a high-priority group also initiates a call, the user who has accessed the low-priority group needs to be pulled into the high-priority group, thereby ensuring the integrity of the call of the high-priority group.

Summary of the invention

In order to ensure the integrity of the call in the high priority group call in the PDT trunking communication system and improve the user experience in the high priority group call, the present invention provides a group call method and apparatus in the trunking communication system.

In order to achieve the above object, the present invention provides a group call method in a trunking communication system, including:

Receiving, by the scheduling server, a handover request for switching the target user in the low-priority group call to the high-priority group call, where the target user belongs to the low-priority group and the corresponding group of the low-priority group call a high priority group corresponding to the high priority group call;

Transmitting corresponding traffic channel assignment information by using the traffic channel of the low priority group call according to whether the user in the low priority group talks, wherein the traffic channel assignment information carries a high priority group call The traffic channel information and the group information of the high priority group are switched to the high priority group call when the target user saves the group call address saved by the target user and the group call address of the high priority group call. in.

Optionally, before the switching request sent by the receiving scheduling server to switch the target user in the low priority group call to the high priority group call, the group calling method further includes: receiving, by the scheduling server, the low a paging request of a low priority group call initiated by a user in the priority group, and establishing a channel resource of the low priority group call; receiving a high priority group sent by the user in the high priority group sent by the scheduling server The paging request is called, and the channel resources of the high priority group call are established.

Optionally, the sending the corresponding service channel assignment information by using the service channel of the low priority group call according to whether the user in the low priority group speaks, including:

When there is no user speaking in the low priority group, constructing traffic channel assignment information of the high priority group call traffic channel, and transmitting the traffic channel assignment information through the traffic channel of the low priority group call;

Determining whether the speaking user is the target user when the user in the low priority group speaks, and if yes, sending the signaling of the forced target user to stop speaking through the traffic channel of the low priority group call, and then entering the high structure The priority group calls the traffic channel assignment information of the traffic channel, and sends the traffic channel assignment information through the low priority group call traffic channel; otherwise, constructs the embedded traffic channel assignment information and passes the low priority group call The traffic channel transmits the embedded traffic channel assignment information.

Optionally, the signaling that forces the target user to stop talking is reverse channel RC signaling.

According to another aspect of the present invention, the present invention further provides a group call method in a trunking communication system, which is applied to a scheduling server, and the group calling method includes:

Transmitting a handover request of the target user that has been connected to the low-priority group call to the high-priority group call to the base station, where the target user belongs to the low-priority group corresponding to the low-priority group call and the high The priority group calls the corresponding high priority group.

Optionally, before the handover request of the target user that has accessed the low priority group call to the high priority group call is sent to the base station, the group call method further includes: starting by the user of the low priority group The paging request of the low priority group call is sent to the base station, and the channel resource of the low priority group call is established by the base station; the paging request of the high priority group call initiated by the user of the high priority group is sent to the base station, The base station establishes channel resources of the high priority group call.

Optionally, the sending, by the target user in the low priority group call, the handover request to the high priority group call to the base station, including: querying whether the user in the high priority group call accesses the low priority The group call, if any, sends a handover request to switch the target user that has accessed the low priority group call to the high priority group call.

According to another aspect of the present invention, the present invention further provides a group call device in a trunking communication system, where the group call device includes: a first receiving module, configured to receive a low priority that is sent by the scheduling server to be accessed The target user in the group call switches to the handover request of the high priority group call, and the target user belongs to the low priority group corresponding to the low priority group call and the high priority group corresponding to the high priority group call a first sending module, configured to send corresponding traffic channel assignment information by using a traffic channel of the low priority group call according to whether the user in the low priority group talks, wherein the traffic channel assignment information carries The traffic channel information of the high priority group call and the group information of the high priority group are switched to when the group call address saved by the target user is the same as the group call address of the high priority group call. The high priority group is called.

Optionally, the group call device further includes: a second receiving module, configured to receive, by the scheduling server, a paging request of a low priority group call initiated by a user in the low priority group, and establish a low priority The third receiving module is configured to receive a paging request of a high priority group call initiated by a user in the high priority group and send a channel resource of the high priority group call.

Optionally, the first sending module includes: a first sending unit, configured to construct a traffic channel assignment information of the high priority group call traffic channel when no user speaks in the low priority group, and pass the low priority Group call The service channel sends the traffic channel assignment information; the second sending unit is configured to construct embedded traffic channel assignment information, and send the embedded traffic channel assignment information by using a low priority group call service channel; the determining unit, And determining, when the user in the low priority group speaks, whether the speaking user is the target user, and if yes, sending, by using the service channel of the low priority group call, signaling that the target user stops speaking, and then triggering the first Transmitting unit; otherwise, triggering the second transmitting unit.

According to another aspect of the present invention, the present invention further provides a group call device in a trunking communication system, which is applied to a scheduling server, and the group call device includes: a second sending module, configured to connect a low priority The handover request of the target user in the group call to the high priority group call is sent to the base station, and the target user belongs to the low priority group corresponding to the low priority group call and the high priority group call corresponding to the high priority group call. Priority group.

Optionally, the group call device further includes: a third sending module, configured to send a paging request of a low priority group call initiated by a user of the low priority group to the base station, and the base station establishes a low priority group call The fourth sending module is configured to send a paging request of the high priority group call initiated by the user of the high priority group to the base station, and the base station establishes the channel resource of the high priority group call.

Optionally, the group call device further includes a query module, configured to query whether a user in the high priority group call accesses the low priority group call, and if yes, trigger the second sending module.

The beneficial effects of the invention are:

The group call method in the trunking communication system provided by the present invention first receives a handover request sent by the scheduling server to switch the target user in the low priority group call to the high priority group call, wherein the target user belongs to the same. The low priority group corresponding to the low priority group and the high priority group corresponding to the high priority group call, and then according to whether the user in the low priority group speaks, the corresponding channel is sent through the service channel of the low priority group call. The traffic channel assignment information is switched to the high priority group call by the target user when the group call address saved by the target user is the same as the group call address of the high priority group call. The high-priority group call can quickly preempt the users in the low-priority group call by transmitting the corresponding service channel assignment information through the service channel of the low-priority group call according to whether the user in the low-priority group talks. The integrity of the call in the high priority group call in the PDF trunking communication system is ensured, and the feeling of the user in the high priority group call is improved.

DRAWINGS

1 is a flow chart showing the main steps of a group call method in a trunking communication system applied to a base station in an embodiment of the present invention;

2 is a flow chart showing the detailed steps of a group call method in a trunking communication system applied to a base station in an embodiment of the present invention;

3 is a flow chart showing the interaction between a base station and a dispatch server in an embodiment of the present invention;

Fig. 4 is a block diagram showing the structure of a group call device in a trunking communication system applied to a base station in an embodiment of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

As shown in FIG. 1 , it is a flowchart of main steps of a group call method in a trunking communication system applied to a base station according to an embodiment of the present invention. The group call method includes the following steps:

Step 101: Receive a handover request sent by a scheduling server.

In this step, the base station receives the handover request sent by the scheduling server, where the handover request is a handover request for switching the target user in the low priority group call to the high priority group call, and the target user belongs to the low priority at the same time. The low priority group corresponding to the level group call and the high priority group corresponding to the high priority group call. Specifically, it should be noted that the high priority group call is relative to the low priority group call, that is, the priority of the high priority group call is higher than the priority of the low priority group call.

Step 102: Send corresponding traffic channel assignment information through the traffic channel of the low priority group call according to whether the user in the low priority group talks.

In this step, the traffic channel assignment information carries the traffic channel information of the high priority group call and the group information of the high priority group. Specifically, the target user can obtain the high priority group call according to the service channel assignment information. The group call address, and when the group call address saved by the target user is the same as the group call address of the high priority group call, the target user switches to the high priority group call.

The high-priority group call can quickly preempt the users in the low-priority group call by transmitting the corresponding service channel assignment information through the service channel of the low-priority group call according to whether the user in the low-priority group talks. The integrity of the call in the high priority group call in the PDF trunking communication system is ensured, and the feeling of the user in the high priority group call is improved.

As shown in FIG. 2, a flowchart of detailed steps of a group call method in a trunking communication system applied to a base station according to an embodiment of the present invention includes the following steps:

Step 201: Receive a paging request of a low priority group call sent by the scheduling server, and establish a channel resource of the low priority group call.

In this step, the user in the low priority group initiates a paging request of the low priority group call, and the paging request of the low priority group call is sent by the scheduling server to the base station, and the base station receives the low priority group call. After the paging request, the channel resources of the low priority group call are established. Specifically, the base station is a base station in a scheduling service area where the low priority group is located, and the channel resources of the low priority group call may include a shared forward traffic channel and a shared reverse traffic channel.

Step 202: Receive a paging request of a high priority group call sent by the scheduling server, and establish a channel resource of the high priority group call.

In this step, the user in the high priority group initiates a paging request of the high priority group call, and the paging request of the high priority group call is sent by the scheduling server to the base station, and the base station receives the high priority group call. After the paging request, the channel resources of the high priority group call are established. Specifically, the base station is a base station in a scheduling service area where the high priority group is located, and the channel resources of the high priority group call may include a shared forward traffic channel and a shared reverse traffic channel.

Step 203: When no user in the low priority group speaks, construct traffic channel assignment information of the high priority group call traffic channel, and send traffic channel assignment information through the traffic channel of the low priority group call.

In this step, when the high priority group call needs to preempt the target user in the low priority group call, if there is no user speaking in the low priority group at this time, the base station constructs the traffic channel of the high priority group call service channel. The information is assigned and the traffic channel assignment information is sent over the traffic channel of the low priority group call. Specifically, when the target user belonging to the low priority group call and the high priority group call receives the service channel assignment information, if the group call address saved by the target user and the group call address of the high priority group call are the same, The target user switches to the high priority group call.

This step is illustrated by the following examples.

A unit is divided into different departments, each department is organized into a group, and then all the chiefs and directors are compiled into a leadership group. The leadership group has a higher priority than the department group.

When a factory manager needs to communicate with all the chiefs on a certain day, he initiates a group leader call. At this time, if no one in the department group speaks, the business channel assignment information of the leader group is sent through the business channel of the department group. When the long-stored group call address and the leader group's group call address are the same, the section chief is pulled into the leader group for communication.

Step 204: When there is a user speaking in the low priority group, determine whether the speaking user is the target user.

In this step, when the high priority group call needs to preempt the target user in the low priority group call, if there is a user in the low priority group talking, it is determined whether the user who is speaking is the target user.

Step 205: If the speaking user is the target user, send a signaling forcing the target user to stop speaking through the traffic channel of the low priority group call, and then proceed to step S203.

In this step, if the user who is speaking is the target user, the target user is first forced to stop speaking. At this time, the base station sends the signaling for forcing the target user to stop speaking through the service channel of the low priority group call. Specifically, the The signaling can be reverse channel RC signaling. After the target user stops talking, the base station constructs the traffic channel assignment information of the high priority group call traffic channel, and transmits the traffic channel assignment information through the traffic channel of the low priority group call. Specifically, after the target user receives the service channel assignment information, if the group call address saved by the target user and the group call address of the high priority group call are the same, the target user switches to the high priority group call.

Step 206: If the speaking user is not the target user, construct embedded traffic channel assignment information, and send embedded traffic channel assignment information through the traffic channel of the low priority group call.

In this step, if the user who is speaking is not the target user, the embedded traffic channel assignment information is constructed, and the embedded traffic channel assignment information is sent through the traffic channel of the low priority group call. Specifically, after the target user receives the embedded service channel assignment information, if the target user saves the group call address and the high priority group When the group call address of the call is the same, the target user switches to the high priority group call.

Steps 204 to 206 are explained below by way of examples.

When a factory manager needs to communicate with all the chiefs on a certain day, he initiates a group leader call. At this time, if someone in the department group speaks, it is judged whether the user in the department group is the section chief, if the department is within the department group. The user who speaks is the section chief, and sends a signaling that forces the section chief to stop speaking through the service channel of the department group. After the section manager stops speaking, the service channel assignment information of the leader group is sent through the service channel of the department group. When the group call address saved by the section chief is the same as the group call address of the leader group, the section chief is pulled into the leader group for communication. If the speaking user is not the section chief, the embedded service channel assignment information is sent through the service channel of the department group, and when the department group receives the service channel assignment information, if the section chief saves the group call address and the leader group When the group call address is the same, the section chief is pulled into the leader group to communicate.

FIG. 3 is a flowchart of interaction between a base station and a scheduling server in an embodiment of the present invention, including the following steps:

Step 301: The scheduling server sends a paging request of the low priority group call to the base station.

In this step, when the user of the low priority group initiates the group call request of the low priority group call, the paging request of the low priority group call is indirectly transmitted to the scheduling server, and when the scheduling server receives the low priority group call After the group call request, the group call request of the low priority group call is sent to the base station. Specifically, the base station schedules a base station in the service area for the low priority group.

Step 302: The base station receives a paging request of a low priority group call sent by the scheduling server, and establishes a channel resource of the low priority group call.

In this step, after receiving the paging request of the low priority group call sent by the scheduling server, the base station establishes the channel resource of the low priority group call. Specifically, the channel resources of the low priority group call include a shared forward traffic channel and a shared reverse traffic channel.

Step 303: The scheduling server sends a paging request of the high priority group call to the base station.

In this step, when the user in the high priority group initiates the group call request of the high priority group call, the paging request of the high priority group call is indirectly transmitted to the scheduling server, and when the scheduling server receives the high priority group call After the group call request, the group call request of the high priority group call is sent to the base station. Specifically, the base station is a base station in the service area of the high priority group scheduling.

Step 304: The base station receives a paging request of a high priority group call sent by the scheduling server, and establishes a channel resource of the high priority group call.

In this step, after receiving the paging request of the high priority group call sent by the scheduling server, the base station establishes the channel resource of the high priority group call. Specifically, the channel resources of the high priority group call include a shared forward traffic channel and a shared reverse traffic channel.

In step 305, the scheduling server sends a handover request to the base station.

In this step, the handover request is to switch the target user that has accessed the low priority group call to the high priority group. The call request for the call. Specifically, before the scheduling server sends the handover request to the base station, the scheduling server first queries whether the user in the high priority group call accesses the low priority group call, and if the user in the high priority group call accesses In the low priority group call, the scheduling server sends the handover request to the base station.

Step 306: The base station receives a handover request sent by the scheduling server.

In this step, the base station receives a handover request sent by the scheduling server to switch the target user in the low priority group call to the high priority group call.

FIG. 4 is a structural block diagram of a group call device in a trunking communication system applied to a base station according to an embodiment of the present invention, where the group call device includes:

The first receiving module 401 is configured to receive a handover request sent by the scheduling server to switch the target user in the low priority group call to the high priority group call, and the target user belongs to the low priority corresponding to the low priority group call The high priority group corresponding to the group and the high priority group call; the first sending module 402 is configured to send the corresponding service by using the low priority group call service channel according to whether the user in the low priority group call service channel speaks Channel assignment information, where the service channel assignment information carries the traffic channel information of the high priority group call and the group information of the high priority group, and the group call address saved by the target user in the target user and the high priority group call When the group call address is the same, switch to the high priority group call.

Optionally, the group call device further includes: a second receiving module, configured to receive a paging request of a low priority group call initiated by a user in the low priority group sent by the scheduling server, and establish a low priority group call The third receiving module is configured to receive a paging request of the high priority group call initiated by the user in the high priority group and send the channel resource of the high priority group call.

Optionally, the first sending module 402 includes: a first sending unit, configured to construct a traffic channel assignment information of the high priority group call traffic channel when the user does not talk in the low priority group, and pass the low priority group The traffic channel of the call sends the traffic channel assignment information; the second sending unit is configured to construct the embedded traffic channel assignment information, and send the embedded traffic channel assignment information to the traffic channel of the low priority group call; the determining unit is configured to: When a user in the low priority group group speaks, it is determined whether the speaking user is the target user, and if yes, the signaling of forcing the target user to stop speaking is sent through the traffic channel of the low priority group call, and then the first sending unit is triggered. Otherwise, the second transmitting unit is triggered.

Optionally, the signaling forcing the target user to stop talking is reverse channel RC signaling.

According to another aspect of the present invention, the present invention further provides a group call device in a trunking communication system, which is applied to a scheduling server, and the group call device includes: a second sending module, configured to access a low priority group call The handover request of the target user to the high-priority group call is sent to the base station, and the target user belongs to the low-priority group corresponding to the low-priority group call and the high-priority group corresponding to the high-priority group call.

Optionally, the group call device further includes: a third sending module, configured to send a paging request of the low priority group call initiated by the user of the low priority group to the base station, where the base station establishes the channel of the low priority group call Resource And a sending module, configured to send a paging request of the high priority group call initiated by the user of the high priority group to the base station, where the channel resource of the high priority group call is established by the base station.

Optionally, the group call device further includes a query module, configured to query whether a user in the high priority group call accesses the low priority group call, and if yes, triggers the second sending module.

The group call device in the above cluster communication system is configured to execute the group call method described above. The group call device in the trunking communication system can be applied to a scheduling server or a base station or the like. The group call device in the trunking communication system may include at least one of a processing component, a memory, a power component, an input and output interface, and a communication component.

The processing component can perform all operations of the group call device in the trunking communication system, such as data communication, recording operations, and the like. Processing components may include one or more processors for executing instructions to implement all or a portion of the steps above. Moreover, the processing component can include one or more modules that facilitate interaction between the processing component and other components.

The memory is configured to store various types of data to support operation of the group call device in the trunked communication system. Examples of such data include instructions, messages, etc. of any application or method running on a group call device in a trunked communication system. The memory can be implemented using any type of volatile or non-volatile memory device, or a combination thereof, 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, Disk or Optical Disk.

The power components provide power to various components of the group call device in the trunked communication system.

The input/output interface provides an interface between the processing component and the peripheral interface module, and the peripheral interface module may be a keyboard, a click wheel, a button, or the like.

The communication component is configured to facilitate wired or wireless communication between the group call device and other devices in the trunked communication system to enable transmission and reception of related data and/or information and the like.

In an exemplary embodiment, there is also provided a non-transitory computer readable storage medium comprising instructions, such as a memory comprising instructions executable by a processor of a group call device in a trunked communication system to perform the above method. For example, the non-transitory computer readable storage medium described above may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. Within the scope of protection of the invention.

Industrial applicability

The invention is applicable to the field of professional mobile communication, and is used for realizing the integrity of a call in a high priority group call in a PDT trunking communication system, and improving the feeling of the user in the high priority group call.

Claims

A group call method in a trunking communication system is applied to a base station, where the group call method includes:

Receiving, by the scheduling server, a handover request for switching the target user in the low-priority group call to the high-priority group call, where the target user belongs to the low-priority group and the corresponding group of the low-priority group call a high priority group corresponding to the high priority group call;

Transmitting corresponding traffic channel assignment information by using the traffic channel of the low priority group call according to whether the user in the low priority group talks, wherein the traffic channel assignment information carries a high priority group call The traffic channel information and the group information of the high priority group are switched to the high priority group call when the target user saves the group call address saved by the target user and the group call address of the high priority group call. in.
The group call method according to claim 1, wherein the group call method is further performed before the handover request sent by the receiving scheduling server to switch the target user in the low priority group call to the high priority group call include:

Receiving, by the scheduling server, a paging request of a low priority group call initiated by a user in the low priority group, and establishing a channel resource of the low priority group call;

Receiving a paging request of a high priority group call initiated by a user in the high priority group sent by the scheduling server, and establishing a channel resource of the high priority group call.
The group call method according to claim 1, wherein the transmitting the corresponding service channel assignment information by using the traffic channel of the low priority group call according to whether the user in the low priority group speaks, includes:

When there is no user speaking in the low priority group, constructing traffic channel assignment information of the high priority group call traffic channel, and transmitting the traffic channel assignment information through the traffic channel of the low priority group call;

Determining whether the speaking user is the target user when the user in the low priority group speaks, and if yes, sending the signaling of the forced target user to stop speaking through the traffic channel of the low priority group call, and then entering the high structure The priority group calls the traffic channel assignment information of the traffic channel, and sends the traffic channel assignment information through the traffic channel of the low priority group call; if not, constructs the embedded traffic channel assignment information and passes the low priority The grouped traffic channel transmits the embedded traffic channel assignment information.
The group call method according to claim 3, wherein the signaling for forcing the target user to stop talking is reverse channel RC signaling.
A group call method in a trunking communication system is applied to a scheduling server, where the group calling method includes:

Transmitting a handover request of the target user that has been connected to the low-priority group call to the high-priority group call to the base station, where the target user belongs to the low-priority group corresponding to the low-priority group call and the high The priority group calls the corresponding high priority group.
The group call method according to claim 5, wherein the group call method further comprises: before the handover request of the target user in the low priority group call to the high priority group call is sent to the base station, the group call method further includes:

Sending a paging request of a low priority group call initiated by a user of the low priority group to the base station, and the channel resource of the low priority group call is established by the base station;

A paging request of a high priority group call initiated by a user of the high priority group is sent to the base station, and the channel resource of the high priority group call is established by the base station.
The method of group call according to claim 5, wherein the sending of the handover request of the target user in the low priority group call to the high priority group call is sent to the base station, including:

Query whether the user in the high priority group call accesses the low priority group call, and if yes, send a handover request to switch the target user that has accessed the low priority group call to the high priority group call.
A group call device in a trunking communication system is applied to a base station, where the group call device includes:

a first receiving module, configured to receive a handover request sent by the scheduling server to switch the target user in the low priority group call to the high priority group call, where the target user belongs to the low priority group call a low priority group and a high priority group corresponding to the high priority group call;

The first sending module is configured to send corresponding traffic channel assignment information by using the traffic channel of the low priority group call according to whether the user in the low priority group talks, wherein the traffic channel assignment information carries The traffic channel information of the high priority group call and the group information of the high priority group are switched to when the group call address saved by the target user is the same as the group call address of the high priority group call. The high priority group is called.
The group call device according to claim 8, wherein the group call device further comprises:

a second receiving module, configured to receive a paging request of a low priority group call initiated by a user in the low priority group sent by the scheduling server, and establish a channel resource of the low priority group call;

The third receiving module is configured to receive a paging request of the high priority group call initiated by the user in the high priority group sent by the scheduling server, and establish a channel resource of the high priority group call.
The group call device according to claim 8, wherein the first sending module comprises:

a first sending unit, configured to: when there is no user speaking in the low priority group, construct traffic channel assignment information of the high priority group call traffic channel, and send the traffic channel by using a low priority group call traffic channel Assign information;

a second sending unit, configured to construct embedded traffic channel assignment information, and send the embedded traffic channel assignment information by using a low priority group call traffic channel;

a determining unit, configured to determine, when a user in the low priority group speaks, whether the speaking user is a target user, and if yes, send, by using the service channel of the low priority group call, a signaling that forces the target user to stop speaking And then trigger the first transmitting unit; if not, trigger the second transmitting unit.
The group call device according to claim 10, wherein the signaling for forcing the target user to stop talking is reverse channel RC signaling.
A group call device in a trunking communication system is applied to a dispatching server, wherein the group call device includes:

The second sending module is configured to send, to the base station, a handover request for switching the target user in the low priority group call to the high priority group call, where the target user belongs to the low priority corresponding to the low priority group call The high priority group corresponding to the level group and the high priority group call.
The group call device of claim 12, wherein the group call device further comprises:

a third sending module, configured to send a paging request of a low priority group call initiated by a user of the low priority group to the base station, where the base station establishes a channel resource of the low priority group call;

The fourth sending module is configured to send a paging request of the high priority group call initiated by the user of the high priority group to the base station, and the base station establishes the channel resource of the high priority group call.
The group call device according to claim 12, wherein the group call device further comprises a query module configured to query whether a user in the high priority group call accesses the low priority group call, if any, Triggering the second sending module.