WO2014101008A1

WO2014101008A1 - Ptt communication method, server, terminal and system

Info

Publication number: WO2014101008A1
Application number: PCT/CN2012/087555
Authority: WO
Inventors: 文华
Original assignee: 华为技术有限公司
Priority date: 2012-12-26
Filing date: 2012-12-26
Publication date: 2014-07-03
Also published as: CN103843373A; CN103843373B

Abstract

Provided in an embodiment of the present invention are a PTT communication method, server, terminal and system, the method comprising: a server receives a PTT communication establishment request transmitted by a terminal, the PTT communication establishment request carrying a group identifier and the cell identifier of a cell where the terminal is currently located; querying, according to the group identifier, the predefined area information of a group corresponding to the group identifier; determining whether the terminal is located in the predefined area of the group according to the queried predefined area information and the cell identifier of the cell where the terminal is currently located; and transmitting a PTT communication establishment response to the terminal according to the determination result. The PTT communication method, server, terminal and system provided in the embodiment of the present invention reduce the implementation cost of the PTT communication in a predefined area.

Description

PTT communication method, server, terminal and system

The embodiments of the present invention relate to communication technologies, and in particular, to a communication method, a server, a terminal, and a system. Background technique

Push To Talk (referred to as PTT) communication is a half-duplex communication method between multiple members belonging to the same group. The basic form is as follows: When a user presses the PTT button on the terminal, the media stream can be transmitted to the members of the same group through the communication network; after the PTT button is released, the media stream stops transmitting. PTT communication in a predefined area means that users in the same group can only perform PTT communication in a predefined area. The characteristics are: When a group is performing PTT communication, if a group member moves to the group Outside the predefined area of the group, he will exit the PTT communication; if a member belonging to the group enters the predefined area of the group, he will join the PTT communication.

Currently, wireless communication systems such as the Global Railway Mobile Communication System (Globle System for

Mobile Communications for Railways (abbreviation: GSM-R) implements PTT communication in a predefined area. However, it is necessary to modify the control plane signaling of the core network and the access network, and add PTT communication information in the signaling processing flow. Therefore, it is necessary to modify the configuration of the core network of the wireless network and the access network element. For example, in the GSM-R network, the Mobile Switching Centre (MSC) and the Multimedia Gateway (Multimedia Gateway) need to be modified. : MGW ), Home Location Register (HLR), Base Station Controller (BSC), Base Transceiver Station (BTS), etc., and are currently in use. In order to implement PTT communication in a predefined area, it is necessary to update or upgrade the core network and the access network element, which requires a great cost and is inconvenient for service deployment. Summary of the invention

Embodiments of the present invention provide a PTT communication method, server, terminal, and system to reduce implementation cost of PTT communication in a predefined area. In a first aspect, an embodiment of the present invention provides a PTT communication method, including: a server receiving a PTT communication establishment request sent by a terminal, where the PTT communication establishment request carries a group identifier and a cell identifier of a cell where the terminal is currently located; Determining the predefined area information of the group corresponding to the group identifier according to the group identifier; determining whether the terminal is located according to the predefined area information that is queried and the cell identifier of the current cell of the terminal In the predefined area of the group; according to the judgment result, the PTT communication establishment response is sent to the terminal.

According to the first aspect, in a first possible implementation manner of the first aspect, the sending, according to the determining result, the PTT communication setup response to the terminal, includes: if the terminal is located in a predefined area of the group Transmitting a PTT communication setup response to the terminal, where the PTT communication setup response carries the group identifier, the predefined area information of the group, where the PTT communication setup response includes PTT communication established. Message or PTT communication allows the establishment of a message.

According to a first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, if the terminal is located in a predefined area of the group, sending the terminal to the terminal

The PTT communication establishment response specifically includes: if the PTT communication of the group corresponding to the group identifier is established, sending a PTT communication established message to the terminal; if the PTT communication of the group corresponding to the group identifier is not established And sending a PTT communication permission establishment message to the terminal.

According to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, if the PTT communication of the group corresponding to the group identifier is not established, the method further includes: The other terminal of the group sends a paging message, where the paging message carries the group identifier of the group and the predefined area information of the group; and the other terminals that receive the group send through the wireless IP network. a paging response message, where the paging response message carries the group identity of the group, and the paging response message is that the other terminal is determined to be currently in the predefined area according to the cell identity of the cell in which the current cell is located. Sent within and after.

According to the first aspect, in a fourth possible implementation manner of the first aspect, the sending, according to the determining result, the PTT communication setup response to the terminal, includes: if the terminal is located in a predefined area of the group In addition, a PTT communication setup response is sent to the terminal, where the PTT communication setup response includes a message that the PTT communication setup fails.

According to the first aspect, any one of the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, when any terminal of the group leaves When the predefined area of the group is used, the method further includes: receiving a departure sent by the leaving terminal a message of the predefined area, where the message leaving the predefined area carries the terminal identifier of the leaving terminal and the group identity of the group; and the left terminal is moved out of the PTT communication of the group.

According to the first aspect, any one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, when any terminal of the group enters When the predefined area of the group is used, the method further includes: receiving a message that is sent by the ingress terminal to enter a predefined area, where the message that enters the predefined area carries the terminal identifier of the incoming terminal and a group identity of the group; adding the entered terminal to a PTT communication of the group.

According to the first aspect, any one of the first to sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, When the PPT communication is ended, the method further includes: receiving, by the terminal that wants to end PPT communication, a call termination request; sending a call end message to all terminals of the group, so that all terminals of the group delete the Predefined area information for the group.

In a second aspect, an embodiment of the present invention provides a PTT communication method, including: a terminal sending a PTT communication establishment request to a server, where the PTT communication establishment request carries a group identifier and a cell identifier of a cell where the terminal is currently located; Determining, by the server, a PTT communication establishment response, where the PTT communication establishment response is that the server determines, according to the predefined area information of the group corresponding to the group identifier, and the cell identifier of the current cell of the terminal, Located in a predefined area of the group and sent according to the judgment result; determining whether to join the PPT communication according to the PPT communication establishment response.

According to the second aspect, in a first possible implementation manner of the second aspect, the PTT communication setup response is sent when the server determines that the terminal is located outside a predefined area of the group, where The PTT communication setup response includes a message that the PTT communication setup failed.

According to the second aspect, in a second possible implementation manner of the second aspect, the PTT communication setup response is sent when the server determines that the terminal is located in a predefined area of the group. The PTT communication setup response includes a PTT communication established message or a PTT communication permission establishment message, and the PTT communication establishment response carries the group identifier of the group, and the predefined area information of the group.

According to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, after the receiving the PTT communication setup response sent by the server, the method further includes: saving the group Predefined area information. According to a third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, when the terminal moves, the method further includes: moving, according to the saved predefined area information, the terminal Determining, by the cell identifier of the cell, whether the terminal leaves a predefined area of the group; when the determination result is yes, sending a message leaving the predefined area to the server, where the message leaving the predefined area carries Determining the terminal identifier and the group identifier of the terminal, so that the server moves the terminal out of the PTT communication of the group.

According to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, after the sending the message that is to leave the predefined area to the server, the method further includes: when the terminal When moving again, determining whether the terminal enters a predefined area of the group according to the saved predefined area information and the cell identifier of the terminal moving to the cell; when the determination result is yes, sending the advancement to the server Defining a message of the area, where the message entering the predefined area carries a terminal identifier and a group identifier, so that the server joins the terminal to the group

PTT communication.

According to a third possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, after the saving the predefined area information of the group, the method further includes: receiving, sending, by the server a call end message, the call end message carrying the group identifier of the group; deleting the locally saved predefined area information of the group.

In a third aspect, an embodiment of the present invention provides a PTT communication method, including: determining, by a server, a PTT communication that allows a group to be established; and transmitting, to the terminal of the group, a paging message of a PTT communication of the group, where the The call message carries the group identifier of the group and the predefined area information of the group.

According to the third aspect, in a first possible implementation manner of the third aspect, the paging response message sent by the terminal of the group is received, where the paging response message carries the group identifier of the group, The paging response message is sent by the terminal after determining that the terminal is currently within the predefined area according to the cell identity of the current cell of the current cell.

According to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, when any terminal of the group leaves a predefined area of the group And the message that is sent by the leaving terminal to leave the predefined area, where the message leaving the predefined area carries the terminal identifier of the leaving terminal and the group identifier of the group; The leaving terminal moves out of the group's PTT communication. According to the third aspect or the first or second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, when any terminal of the group enters the group After the pre-defined area is sent, after the paging message of the PTT communication of the group is sent to the terminal of the group, or after the message of the pre-defined area sent by the terminal receiving the group, The method includes: receiving a message that is sent by a terminal of the group to enter a predefined area, where the message entering the predefined area carries a terminal identifier and a group identifier; and the terminal is added to the PTT communication of the group.

According to the third aspect, any one of the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, when any terminal of the group When the PPT communication is to be ended, the method further includes: receiving a call end request sent by the terminal that wants to end the PPT communication; sending a call end message to all terminals of the group, so that all the terminals of the group delete the group Predefined area information for the group.

In a fourth aspect, an embodiment of the present invention provides a PTT communication method, including: receiving, by a terminal, a paging message of a PTT communication of a group sent by a server, where the paging message carries a group identifier of the group and the Pre-defined area information of the group; corresponding to the group identifier, pre-defined area information of the group is saved.

According to the fourth aspect, in a first possible implementation manner of the fourth aspect, determining, according to the cell identifier of the cell where the terminal is currently located, and the predefined area information, whether the current location is within the predefined area of the group. And if the terminal is currently located in the predefined area of the group, sending a paging response message to the server, where the paging response message carries the group identifier of the group.

According to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, if the terminal is currently located outside a predefined area of the group, and the terminal moves After the method, the method further includes: determining, according to the saved predefined area information and the cell identifier of the terminal moving to the cell, whether the terminal enters a predefined area of the group; when the terminal enters a predefined area of the group Sending a message to the server to enter a predefined area, where the message entering the predefined area carries the terminal identifier of the terminal and the group identifier of the group, so that the server will The terminal joins the PTT communication of the group.

According to the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the message that is sent to the server to enter a predefined area, or the direction After the server sends the paging response message, when the terminal moves, the method further includes: Preserving the predefined area information and the cell identity of the terminal moving to the cell determining whether the terminal leaves a predefined area of the group; when the terminal leaves a predefined area of the group, to the server Sending a message leaving the predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group identity of the group, so that the server moves the terminal out of the PTT of the group Communication.

According to the fourth aspect, the first to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, After the paging message of the PTT communication, the method further includes: receiving a call end message sent by the server, where the call end message carries a group identifier of the group; deleting pre-defined area information of the group saved locally .

According to a fifth aspect, an embodiment of the present invention provides a server, including: a receiving module, configured to receive a PTT communication establishment request sent by a terminal, where the PTT communication establishment request carries a group identifier and a cell identifier of a cell where the terminal is currently located a querying module, configured to query, according to the group identifier, predefined area information of a group corresponding to the group identifier, and a determining module, configured to: according to the predefined area information that is queried and the current cell of the terminal a cell identifier, determining whether the terminal is located in a predefined area of the group; and sending, by the sending module, a PTT communication establishment response to the terminal according to the determination result.

According to the fifth aspect, in a first possible implementation manner of the fifth aspect, when the terminal is located in a predefined area of the group, the PTT communication establishment response includes a PTT communication established message or a PTT The communication allows a message to be established, and the PTT communication setup response carries the group identifier, the predefined area information of the group.

According to the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the sending module is specifically configured to: if the PTT communication of the group corresponding to the group identifier is established And sending a PTT communication established message to the terminal; if the PTT communication of the group corresponding to the group identifier is not established, sending a PTT communication permission establishment message to the terminal.

According to a second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the sending module is further configured to: if the PTT communication of the group corresponding to the group identifier is not established And sending a paging message to the other terminal of the group, where the paging message carries the group identifier and the predefined area information of the group; the receiving module is further configured to: receive the group a paging response message sent by another terminal of the group, where the paging response message carries the group The group identifier, the paging response message is sent by the other terminal after determining that the current location is within the predefined area according to the cell identity of the cell in which the current cell is located.

According to the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the sending module is specifically configured to: send the PTT communication to the terminal if the terminal is located outside a predefined area of the group Establishing a response, wherein the PTT communication establishment response includes a message that the PTT communication establishment fails.

According to the fifth aspect, any one of the first to fourth possible implementation manners of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, when any terminal of the group leaves The receiving module is further configured to receive a message that is sent by the leaving terminal to leave a predefined area, where the message leaving the predefined area carries the terminal of the leaving terminal Identifying and group identification of the group;

The method further includes: a removal module, configured to move the leaving terminal out of the group of PTT communications. According to the fifth aspect, any one of the first to fifth possible implementation manners of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, when any terminal of the group enters The receiving module is further configured to receive a message that is sent by the terminal of the group to enter a predefined area, where the message entering the predefined area carries the entered terminal The terminal identifier and the group identifier of the group; the server further includes: an adding module, configured to join the incoming terminal to the PTT communication of the group.

According to the fifth aspect, any one of the first to the sixth possible implementation manners of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, The receiving module is further configured to receive, by the terminal that is to end the PPT communication, a call termination request, where the sending module is further configured to send a call end message to all terminals of the group, so that All terminals of the group delete the predefined area information of the group.

According to a sixth aspect, an embodiment of the present invention provides a terminal, including: a sending module, configured to send a PTT communication establishment request to a server, where the PTT communication establishment request carries a group identifier and a cell identifier of a cell where the terminal is currently located; a receiving module, configured to receive a PTT communication setup response sent by the server, where the PTT communication setup response is a predefined area information of the group corresponding to the group identifier by the server, and a cell of a cell where the terminal is currently located And determining, by the processing module, whether the terminal is located in a predefined area of the group and sent according to the determination result, and determining, by the PPT communication establishment response, whether to join the PPT communication. According to the sixth aspect, in a first possible implementation manner of the sixth aspect, when the PTT communication setup response is sent when the server determines that the terminal is located outside a predefined area of the group The PTT communication establishment response includes a message that the PTT communication establishment fails.

According to the sixth aspect, in a second possible implementation manner of the sixth aspect, when the PTT communication setup response is sent when the server determines that the terminal is located in a predefined area of the group And the PTT communication establishment response includes a PTT communication established message and a PTT communication permission establishment message, and carries the group identifier of the group, and the predefined area information of the group.

According to a second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the method further includes: a storage module, configured to save the predefined area information of the group.

According to a third possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the method further includes: an area monitoring module, configured to: when the terminal moves, according to the saved predefined area information And the cell identifier that is sent by the terminal to the cell to determine whether the terminal leaves a predefined area of the group; the sending module is further configured to: if the area monitoring module determines that the terminal leaves the group Defining an area, sending a message leaving the predefined area to the server, where the message leaving the predefined area carries the terminal identifier and the group identifier of the terminal, so that the server moves the terminal out of the Group PTT communication.

According to a fourth possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the area monitoring module is further configured to: when the terminal moves again, according to the saved predefined area The information and the cell identifier of the terminal moving to the cell determine whether the terminal enters a predefined area of the group; the sending module is further configured to: if the area monitoring module determines that the terminal enters the group a predefined area, the message sent to the predefined area is sent to the server, where the message entering the predefined area carries the terminal identifier and the group identifier, so that the server joins the terminal to the group. PTT communication.

According to a third possible implementation manner of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, the receiving module is further configured to: receive a call end message sent by the server, the call end message The group identifier of the group is carried in the group; and the deleting module is configured to delete the predefined area information of the group that is locally saved.

According to a seventh aspect, the embodiment of the present invention provides a server, including: a processing module, configured to determine a PTT communication that is allowed to establish a group; and a sending module, configured to send the group to the terminal of the group Paging message of the PTT communication, the paging message carrying the group of the group Identify and pre-defined area information for the group.

According to the seventh aspect, in a first possible implementation manner of the seventh aspect, the method further includes: a receiving module, configured to receive a paging response message sent by the terminal of the group, where the paging response message carries The group identity of the group, the paging response message is sent by the terminal after determining that the terminal is currently within the predefined area according to the cell identity of the current cell.

According to the seventh aspect, in a second possible implementation manner of the seventh aspect, when any terminal of the group leaves a predefined area of the group, the receiving module is further configured to receive the a message sent by the leaving terminal to leave the predefined area, where the message leaving the predefined area carries the terminal identifier of the leaving terminal and the group identifier of the group; the server further includes: a removal module, The PTT communication of the group is moved out of the leaving terminal.

According to the seventh aspect or the first or second possible implementation manner of the seventh aspect, in a third possible implementation manner of the seventh aspect, when any terminal of the group enters the group The receiving module is further configured to: receive a message that is sent by the ingress terminal and enter a predefined area, where the message that enters the predefined area carries the terminal identifier of the incoming terminal and the group The group identifier of the group; the server further includes: an adding module, adding the entered terminal to the PTT communication of the group.

According to the seventh aspect, or any one of the first to the third possible implementation manners of the seventh aspect, in a fourth possible implementation manner of the seventh aspect, End

The receiving module is further configured to: after receiving the paging response message sent by the terminal that wants to end the PPT communication, receive a call end request sent by the terminal of the group; the sending module further And sending, to all terminals of the group, a call end message, so that all terminals of the group delete the predefined area information of the group.

According to an eighth aspect, an embodiment of the present invention provides a terminal, including: a receiving module, configured to receive a paging message of a PTT communication of a group sent by a server, where the paging message carries the group a group identifier and predefined area information of the group; a storage module, configured to save the predefined area information of the group corresponding to the group identifier.

According to the eighth aspect, in a first possible implementation manner of the eighth aspect, the method further includes: an area monitoring module, configured to determine, according to a cell identifier of the current cell of the terminal, and the predefined area information, Whether it is located in a predefined area of the group; a sending module, configured to send a page to the server if the terminal is currently located in a predefined area of the group In response to the message, the paging response message carries the group identity of the group.

According to a first possible implementation manner of the eighth aspect, in a second possible implementation manner of the eighth aspect, the area monitoring module is further configured to: if the terminal is currently located in a predefined area of the group In addition, after the terminal moves, determining whether the terminal enters a predefined area of the group according to the saved predefined area information and the cell identifier of the terminal moving to the cell; the sending module is further configured to: When the area monitoring module determines that the terminal enters a predefined area of the group, sending a message to the server to enter a predefined area, where the message entering the predefined area carries the terminal identifier of the terminal and The group identity of the group, such that the server joins the terminal to the PTT communication of the group.

According to the eighth aspect or the first or second possible implementation manner of the eighth aspect, in a third possible implementation manner of the eighth aspect, the area monitoring module is further configured to: After the server sends a message to enter a predefined area, or after sending a paging response message to the server, when the terminal moves, determining according to the saved predefined area information and the cell identity of the terminal moving to the cell Whether the terminal leaves a predefined area of the group; the sending module is further configured to: when the area monitoring module determines that the terminal leaves a predefined area of the group, send a departure pre- The message of the area is defined, and the message leaving the predefined area carries the terminal identifier of the terminal and the group identity of the group, so that the server moves the terminal out of the PTT communication of the group.

In a fourth possible implementation manner of the eighth aspect, the receiving module is further configured to: After receiving the paging message of the PTT communication of the group sent by the server, receiving the call end message sent by the server, where the call end message carries the group identifier of the group; further comprising: a deleting module, configured to: Delete the predefined area information of the group saved locally.

The ninth aspect, the embodiment of the present invention provides a communication system, including the server, any one of the sixth aspect or the sixth aspect, in any one possible implementation manner of the fifth aspect or the fifth aspect And a terminal in any one of the possible implementations of the eighth aspect or the eighth aspect.

The ninth aspect, the embodiment of the present invention provides a communication system, including the server in any one of the possible implementation manners of the seventh aspect or the seventh aspect, and at least one possible implementation of the eighth aspect or the eighth aspect The terminal in the way. The PTT communication method, the server, the terminal, and the system provided by the embodiment of the present invention enable the terminal to transmit the predefined area information of the group to all the registered terminals of the group when the communication is established, so that the terminal can determine whether the current terminal is currently It is located within a predefined area of the group, so as to realize the function of communication only within the predefined area; communication between the server and the terminal through the wireless IP network does not need to change any network element in the mobile network. Thereby, the function of making the PTT communication have a predefined area based on the existing mobile network is realized. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a flowchart of Embodiment 1 of a PTT communication method according to the present invention;

2 is a flowchart of Embodiment 2 of a PTT communication method according to the present invention

3 is a flowchart of Embodiment 3 of a PTT communication method according to the present invention

4 is a flowchart of Embodiment 4 of a PTT communication method according to the present invention

FIG. 5 is a flowchart of Embodiment 5 of a PTT communication method according to the present invention;

6 is a flowchart of Embodiment 6 of a PTT communication method according to the present invention.

7 is a flowchart of Embodiment 7 of a PTT communication method according to the present invention.

8 is a flowchart of Embodiment 8 of a PTT communication method according to the present invention.

FIG. 9 is a signaling flowchart of Embodiment 9 of a PTT communication method according to the present invention;

10 is a schematic structural diagram of Embodiment 1 of a server according to the present invention;

11 is a schematic structural diagram of Embodiment 2 of a server according to the present invention;

12 is a schematic structural diagram of Embodiment 1 of a terminal according to the present invention;

13 is a schematic structural diagram of Embodiment 2 of a terminal according to the present invention;

14 is a schematic structural diagram of Embodiment 3 of a server according to the present invention;

15 is a schematic structural diagram of Embodiment 4 of a server according to the present invention;

16 is a schematic structural diagram of Embodiment 3 of a terminal according to the present invention;

17 is a schematic structural diagram of Embodiment 4 of a terminal according to the present invention;

18 is a schematic structural diagram of Embodiment 1 of a communication system according to the present invention; 19 is a schematic structural diagram of Embodiment 2 of a communication system according to the present invention;

20 is a schematic structural diagram of Embodiment 5 of a server according to the present invention;

21 is a schematic structural diagram of Embodiment 5 of a terminal according to the present invention;

22 is a schematic structural diagram of Embodiment 6 of a server according to the present invention;

FIG. 23 is a schematic structural diagram of Embodiment 6 of a terminal according to the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the embodiment of the present invention, the predefined area information of at least one group is added to the group attribute of the PTT server (for example, the cell identification list of the corresponding group), which means that for a certain group, only in its predefined area ( For example, in the cells corresponding to the cell identifier list, the PPT communication of the group can be performed. This field can be maintained by the user or by the computer. The embodiment of the present invention does not impose any limitation. At the same time, the following functions are added to the PPT application of the terminal: The PPT group information that belongs to the terminal and is in communication is saved, and includes: a group identifier, and predefined area information corresponding to the group. The saved information can be automatically maintained by the system according to the signaling interaction. In addition, the function of acquiring the cell identifier of the current cell of the terminal in real time is added, for example, the command interface of the wireless modem (modem) in the terminal is called, so that the current cell of the terminal is obtained in real time. Cell identity. Generally, a wireless modem is a necessary module in a mobile terminal, and the module cooperates with a wireless network to complete a wireless transmission function. This module provides a command interface for external calls. In the interface command set, you can set the command to query the cell ID of the cell where the terminal is currently located.

In this way, the terminal can forward the information of the cell in which it is currently located to the server in real time, and the server can determine whether the terminal is in the predetermined area according to the predefined area information of the pre-stored group, thereby determining whether The terminal joins the PPT communication of the group. In this way, only the configuration of the server and the terminal needs to be modified, and the PPT communication in the predefined area can be realized without adapting and modifying the wireless network, thereby reducing the requirement of the PPT communication to the wireless network and reducing the cost.

In various embodiments of the present invention, a wireless IP (network interconnection protocol) can be used between the server and the terminal. Internet Protocol) The network communicates. The wireless IP network can be any wireless network supporting the IP transmission protocol, such as the wireless packet network of the mobile communication carrier; the server can be a computer capable of carrying the PTT communication application and connecting to the wireless IP network; It may be a terminal device capable of carrying a PTT communication application and capable of accessing a wireless IP network, such as a handheld terminal or an in-vehicle terminal, and each terminal belongs to at least one group corresponding to the group information saved in the server, that is, the terminal. Is a member of a group.

FIG. 1 is a flowchart of Embodiment 1 of a PTT communication method according to the present invention. The execution body of this embodiment is a server. As shown in FIG. 1, the method in this embodiment may include:

Step 101: The server receives a PTT communication establishment request sent by the terminal, where the PTT communication establishment request carries a group identifier and a cell identifier of a cell where the terminal is currently located.

Usually, the terminal needs to open the PTT communication application before it can interact with the server. When the PTT communication application is opened, the terminal logs in. The specific process is as follows: The terminal sends a registration message to the server, where the registration message carries the terminal identifier and the IP address of the terminal. The server will locally store the mapping relationship between the terminal identifier and the IP address of the terminal. During the subsequent interaction, the terminal will always use the IP address to communicate with the server until the terminal exits the PTT communication application. After the terminal exits the PTT communication application, the server regards the terminal as an offline state, and deletes the mapping relationship between the terminal identifier of the terminal and the IP address of the terminal.

The actual scenario of step 101 is: after the terminal opens the PTT communication application, selects a group in which the terminal is located, and sends a PTT communication establishment request, and the server receives a cell identifier including the group identifier and the cell currently located by the terminal. The PTT communication establishes a request, and the server can determine the terminal identifier of the terminal by using the IP address sent by the request. Moreover, the PTT communication establishment request is a request message of the user plane, and the terminal may send the request message to the server through the wireless IP network in the form of an IP data packet, without involving the control plane signaling in the communication network, and the terminal and the server are both Control plane signaling communication with the communication network itself is not performed.

Step 102: Query, according to the group identifier, the predefined area information of the group corresponding to the group identifier.

The server stores predefined area information of each group. Generally, the predefined area information may be a cell identifier of all cells in the predefined area.

Step 103: Determine, according to the queried predefined area information and the cell identifier of the cell where the terminal is currently located, whether the terminal is located in a predefined area of the group. Specifically, by traversing all the cell identifiers of the predefined area, it is determined whether the cell identity of the cell where the terminal is currently located matches one of the cell identifiers of the predefined area.

Step 104: Send a PTT communication setup response to the terminal according to the judgment result.

Specifically, if the terminal is located in a predefined area of the group, sending a PTT communication setup response to the terminal, where the PTT communication setup response carries the group identifier of the group, the group Predefined area information for the group.

The PTT communication setup response carries the group identifier of the group, so that the terminal can determine, according to the group identifier, which group the PTT communication setup response corresponds to, thereby determining whether to join the group. The PTT communication setup response carries the predefined information of the group, so that the terminal of the group can determine for itself whether it is located in a predefined area of the group.

The PTT communication setup response includes a PTT communication established message and a PTT communication permission establishment message. Specifically, if the group that the terminal wants to establish the PTT communication is currently performing PTT communication, the server sends a PTT communication established message to the terminal; If the PTT communication of the group that the terminal wants to establish PTT communication is not established, the server sends a PTT communication permission establishment message to the terminal.

And if the terminal is located outside the predefined area of the group, the PTT communication setup response sent to the terminal includes a message that the PTT communication setup failed.

In this embodiment, when the server receives the PTT communication establishment request sent by the terminal, the server queries and determines whether the terminal is located in a predefined area of the group for which the PTT communication is to be performed, and sends a different PTT to the terminal according to the determination result. The communication establishment response implements a predefined area function of the PTT communication establishment phase; and when the terminal is located within the predefined area of the group, the PTT communication establishment response sent to the terminal carries the group identifier of the group And pre-defined area information, so that the terminal can determine whether it is located within the predefined area, so that the terminal can perform different operations according to the determined situation, thereby implementing the predefined area function in the PTT communication process; In the process of defining the regional function, the information exchange between the server and the terminal is realized through the wireless IP network, and the information exchanged is the information of the user plane for the wireless IP network, and does not need to interact with the wireless IP network itself, nor does it involve communication. Control plane signaling in the network; that is, the method of this embodiment, only To provide a server supporting the method and a terminal supporting the method, the server and the terminal can communicate through any existing wireless IP network, and do not need to change any network element in the existing communication network, thereby realizing Based on the existing mobile network, the PTT communication has the function of pre-defined area, which reduces the implementation cost of the PTT communication of the predefined area. 2 is a flowchart of Embodiment 2 of a PTT communication method according to the present invention. The execution body of this embodiment is a server. As shown in the figure, the method in this embodiment may include:

Step 201: The server receives a PTT communication establishment request sent by the terminal, where the PTT communication establishment request carries a group identifier and a cell identifier of a cell where the terminal is currently located.

Step 202: Query, according to the group identifier, the predefined area information of the group corresponding to the group identifier.

Step 203: Determine, according to the queried predefined area information and the cell identifier of the cell where the terminal is currently located, whether the terminal is located in a predefined area of the group.

Step 204: Send a PTT communication setup response to the terminal according to the determination result.

Specifically, if the terminal is located outside the predefined area of the group, the PTT communication establishment response sent to the terminal includes a message that the PTT communication establishment fails, and the PTT communication establishment failure message may also be carried. The reason for the failure, for example: The terminal is outside the predefined area of the group.

Sending a PTT communication setup response to the terminal, where the PTT communication setup response carries the group identifier of the group, and the group pre- The area information is defined, and the group identifier of the group and the predefined information of the group are carried in the PTT communication setup response, so that the terminal of the group can determine whether it is located in a predefined area of the group. The PTT communication setup response includes a PTT communication established message and a PTT communication allowed setup message. Specifically, if the group that the terminal wants to establish PTT communication is currently performing PTT communication, the server sends a PTT communication established message to the terminal, and the terminal may directly join the PTT communication of the group; If the PTT communication of the group that the terminal wants to establish the PTT communication is not established, the server sends a PTT communication permission establishment message to the terminal. In this case, the following steps are also required to perform the PTT communication of the group.

Step 205: Send a paging message to the other terminals of the group, where the paging message carries the group identifier of the group and the predefined area information of the group.

Specifically, the server will send a paging message to all other registered terminals of the group except for transmitting a PTT communication setup request. The server does not judge whether the other terminals are in the predefined area, but carries the predefined area information in the paging message and sends it to the terminal, and the terminal determines whether it is within the predefined area.

Step 206: Receive a paging response message sent by another terminal of the group, where the paging response is The message identifier of the group is carried in the message, and the paging response message is sent by the other terminal after determining that the terminal is currently in the predefined area according to the cell identity of the cell in which the current cell is located.

And if the terminal determines that it is currently outside the predefined area of the group, it does not send a page response message to the server.

Step 207: Receive a message that is sent by the terminal of the group to leave a predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group identifier of the group.

Step 208: Move the terminal out of the PTT communication of the group.

Specifically, in step 208, the server further determines whether the terminal is a host terminal: if the terminal is a non-talking terminal, stopping sending the media stream of the calling terminal to the terminal; if the terminal is the main terminal, translating and releasing the right to speak , and update the status of "No Speaker" of the group to "No", so that other terminals in the group that are conducting PTT communication can apply for the right to speak.

Steps 207 and 208 are a set of optional steps, where the specific scenario is: the current cell of the terminal in the group that is undergoing PTT communication changes, when the terminal determines that the terminal has moved to a predefined area of the group. The message leaving the predefined area will be sent to the server, at which point the server performs steps 207, 208.

Step 209: Receive a message that the terminal of the group sends a predefined area, where the message that enters the predefined area carries the terminal identifier of the terminal and the group identifier of the group.

Steps 209 and 210 are a set of optional steps. The specific scenario is as follows: The current cell of the terminal of the group changes. For example, after the server performs steps 207 and 208, the terminal continues to move and moves back to the predefined area. Within the time, the terminal will send a message to the server to enter the predefined area, at which time the server performs steps 209, 210.

Step 210: Add the terminal to the PTT communication of the group.

Specifically, the server sends the media stream of the host terminal to the terminal.

Step 211: The terminal that receives the group sends a call end request.

Step 212: Send a call end message to all terminals of the group, so that all terminals of the group delete the predefined area information of the group.

Specifically, any terminal that is performing PTT communication may send a call end request to the server, and after receiving the call end request, the server sends a call end message to all registered terminals of the group, so that the terminal deletes the call. Predefined area information for the group. In this embodiment, the predefined area information of the group is sent to the terminal of the group by the server, and the current cell of the terminal changes after receiving the PTT communication established message, the PTT communication permission establishment message or the paging message by the terminal. After that, it can determine whether it is located in the predefined area of the group, and perform different operations according to the determined situation, such as sending a paging response to the server or not sending a paging response, sending the server to the predefined area or leaving the predefined The message of the area, thereby implementing the predefined area function of the PTT communication; all the interactions between the server and the terminal are performed through the existing wireless IP network, and all the interaction information is user plane information for the communication network, and does not involve Communication network control plane signaling, therefore, the method of this embodiment can not change existing wireless

The IP network realizes the predefined area function of PTT communication, which reduces the implementation cost.

FIG. 3 is a flowchart of Embodiment 3 of a PTT communication method according to the present invention. The execution body of this embodiment is a terminal that sends a PTT communication setup request. As shown in FIG. 3, the method in this embodiment may include: Step 301: A terminal sends a PTT communication setup request to a server, where the PTT communication setup request carries a group identifier and a cell identifier of a cell where the terminal is currently located.

Specifically, the server may query the predefined area of the group by using the group identifier, so that it may be determined whether the terminal is currently located in a predefined area of the group.

Step 302: Receive a PTT communication establishment response sent by the server, where the PTT communication establishment response is a predefined area information of the group corresponding to the group identifier and a cell identifier of a current cell of the terminal, Determining whether the terminal is located in a predefined area of the group and transmitting according to the judgment result.

Step 303: Determine, according to the PPT communication establishment response, whether to join the PPT communication of the group.

Specifically, when the PTT communication setup response received by the terminal includes a PTT communication established message or a PTT communication permission establishment message, determining to join the PTT communication of the group; when the PTT communication establishment response received by the terminal includes a PTT If the communication establishment fails, it is determined that the PTT communication of the group cannot be joined.

In this embodiment, the PTT communication setup request sent by the terminal to the server carries the group identifier and the current cell identifier of the terminal, so that the server can query the predefined area information of the group according to the group identifier, thereby determining whether the terminal is located. Within a predefined area of the group, and receiving a different PTT communication setup response sent by the server to the terminal according to the judgment result, implementing a predefined area function in the PTT communication establishment phase; all interactions between the server and the terminal are through existing Wireless All the interaction information performed by the IP network is user plane information for the communication network, and does not involve communication network control plane signaling. Therefore, the method of this embodiment can implement PTT communication without changing the existing wireless IP network. The predefined zone features reduce implementation costs.

4 is a flowchart of Embodiment 4 of a PTT communication method according to the present invention. The execution subject of this embodiment is a terminal that sends a PTT communication establishment request. As shown in FIG. 4, the method in this embodiment may include: Step 401: A terminal sends a PTT communication setup request to a server, where the PTT communication setup request carries a group identifier and a cell identifier of a cell where the terminal is currently located.

If the terminal is currently located outside the predefined area of the group, the received PTT communication establishment response sent by the server includes a message that the PTT communication establishment fails, and the message is that the server determines that the terminal is located in the Sent when the group ID corresponds to the group corresponding to the predefined area.

Step 402: Receive a PTT communication setup response sent by the server, where the PTT communication setup response carries the predefined identifier information of the group identifier and the group corresponding to the group identifier, where the PTT communication establishment response is The server sends, according to the predefined area information of the group corresponding to the group identifier and the cell identifier of the cell where the terminal is currently located, after determining that the terminal is located in a predefined area of the group.

Specifically, the PTT communication setup response includes a PTT communication established message and PTT communication allows the establishment of a message. If the group that the terminal wants to establish PTT communication is currently performing PTT communication, the PTT communication establishment response sent by the server is a PTT communication established message, and the terminal can directly join the PTT communication of the group; if the terminal wants The PTT communication establishment of the group to establish the PTT communication is not established, and the PTT communication establishment response sent by the server is a PTT communication permission establishment message.

Step 403: Determine, according to the PPT communication establishment response, a PPT communication that joins the group. Step 404: Save predefined area information of the group.

Step 405: When the terminal moves, determine, according to the saved predefined area information and the cell identity that the terminal moves to the cell, whether the terminal leaves a predefined area of the group.

Step 406: When the determination result is yes, send a message to the server to leave the predefined area, where the message leaving the predefined area carries the terminal identifier and the group identifier of the terminal, so that the server will The terminal moves out of the PTT communication of the group.

The terminal leaves the predefined area of the group, specifically, the cell where the terminal is located changes, the original cell is located in a predefined area of the group, and the current cell is located in the group. Outside of the predefined area.

Step 407: When the terminal moves again, determine, according to the saved predefined area information and the cell identifier that the terminal moves to the cell, whether the terminal enters a predefined area of the group.

Step 408: When the determination result is yes, send a message to the server to enter a predefined area, where the message entering the predefined area carries a terminal identifier and a group identifier, so that the server joins the terminal The group's PTT communication.

The scenario of steps 407 and 408 is: the terminal moves outside the predefined area of the group and then moves back to the predefined area of the group. At this time, the message to enter the predefined area is sent to the server.

Step 409: Receive a call end message sent by the server, where the call end message carries a group identifier of the group.

The call end message is sent by the server after receiving a call end request sent by any terminal of the group that is performing PTT communication.

Step 410: Delete pre-defined area information of the group saved locally.

The purpose of step 410 is to stop the terminal from entering the predefined area or leaving the predefined area when the terminal enters or leaves the predefined area of the group after the PTT communication of the group ends.

In this embodiment, the terminal establishes the predefined area information of the group carried in the response by using the PTT communication sent by the receiving server, and uses the predefined area information to determine whether it is currently located in the predefined area of the group when moving. Therefore, according to the determined situation, the server sends a message leaving the predefined area or entering the predefined area, so that the server moves the terminal out or joins the PTT communication of the group, thereby implementing a predefined area function of the PTT communication; The interaction is performed through the existing wireless IP network. All the interaction information is the user plane information for the communication network, and does not involve the communication network control plane signaling. Therefore, the method of this embodiment may not change the existing The wireless IP network realizes the predefined area function of PTT communication, which reduces the implementation cost.

FIG. 5 is a flowchart of Embodiment 5 of a PTT communication method according to the present invention. The execution body of this embodiment is a server. As shown in FIG. 5, the method in this embodiment may include:

Step 501: The server determines to allow PTT communication of the group to be established.

The specific scenario is, for example, the server receives the establishment of the PTT communication sent by one terminal of the group. The request, and after determining that the terminal is within a predefined area of the group, then the server determines to allow establishment of the group's PTT communication.

Step 502: Send a paging message of the PTT communication of the group to the terminal of the group, where the paging message carries a group identifier of the group and predefined area information of the group.

Specifically, the target object that the server sends the paging message may be sent in the group except

The PTT communicates with other terminals than the requesting terminal.

The paging message carries the group identifier of the group and the predefined area information of the group, so that the terminal receiving the paging message can determine whether it is located according to the predefined area information of the group. Within the predefined area of the group.

In this embodiment, the server carries the group identifier and the predefined area information of the group in the paging message sent by the server, so that the terminal can determine whether it is located in the predefined area, so that the terminal can judge according to the judgment. The case performs different operations, such as returning a page response or not returning a page response, and transmitting a message entering or leaving a predefined area of the group during subsequent PTT communication, thereby implementing a predefined area of PTT communication. Function; Because the above implementation of the predefined area function, the information interaction between the server and the terminal can be realized through the existing wireless IP network, and the information exchanged is the user plane information for the wireless IP network, and the wireless IP The network itself does not need to interact, nor does it involve control plane signaling in the communication network; that is, the method of this embodiment only needs to provide a server supporting the method and a terminal supporting the method, and the server and the terminal can pass the present Any wireless IP network can communicate without changing the existing one. Any communication network NE, thereby realizing the PTT communication based on the existing mobile network having a predefined area functions to reduce the implementation cost of a predefined PTT communication area.

FIG. 6 is a flowchart of Embodiment 6 of the PTT communication method according to the present invention. The execution body of this embodiment is a server. As shown in FIG. 6, the method in this embodiment may include:

Step 601: The server determines to allow PTT communication of the group to be established.

Step 602: Send, to the terminal of the group, a paging message of the PTT communication of the group, where the paging message carries a group identifier of the group and predefined area information of the group.

Step 603: Receive a paging response message sent by the terminal of the group, where the paging response message carries a group identifier of the group, where the paging response message is that the terminal is according to its current current cell. The cell identifier is sent after being judged to be currently within the predefined area.

And if the terminal receiving the paging message determines that it is currently in a predefined area of the group In addition, the paging response message is not sent to the server; when the terminal moves into the predefined area of the group, the server will send a message to the predefined area, which does not need to be Send a page response message.

Step 604: Receive a message that is sent by the terminal of the group to leave a predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group identifier of the group.

Step 605: Move the terminal out of the PTT communication of the group.

Steps 604 and 605 are a set of optional steps. The specific scenario is: the current cell of the terminal in the group that is undergoing PTT communication changes, when the terminal determines that the current location is outside the predefined area of the group. The message leaving the predefined area will be sent to the server, at which point the server performs steps 604, 605.

In step 605, the server further determines whether the terminal is the main terminal: if the terminal is a non-talking terminal, stopping sending the media stream of the calling terminal to the terminal; if the terminal is the main terminal, translating the right to speak, and The status of "whether or not there is a speaker" of the group is updated to "No", so that other terminals in the group that are performing PTT communication can apply for the right to speak.

Step 606: Receive a message that is sent by the terminal of the group to enter a predefined area, where the message that enters the predefined area carries the terminal identifier of the terminal and the group identifier of the group.

Step 607: Add the terminal to the PTT communication of the group.

Steps 606 and 607 are a set of optional steps, where the specific scenario is: the current cell of a certain terminal of the group changes, for example, the terminal moves to a predefined area of the group, and the server performs steps 604 and 605. After the terminal continues to move and moves back to the predefined area of the group, a message to enter the predefined area will be sent to the server. At this time, the server performs steps 606, 607; or, the server performs step 603. When a terminal in the group is outside the predefined area of the group, and the terminal moves to a predefined area of the group at the current moment, the terminal sends a message to the server to enter the predefined area, which The server then performs steps 606, 607.

In step 607, specifically, the server sends the media stream of the host terminal to the terminal.

Step 608: Receive a call end request sent by the terminal of the group.

Step 609: Send a call end message to all terminals of the group, so that all terminals of the group delete the predefined area information of the group.

Specifically, any terminal that is performing PTT communication may send a call end request to the server, and the server sends a call to all registered terminals of the group after receiving the call end request. Ending the message, so that the terminal deletes the predefined area information of the group.

In this embodiment, the pre-defined area information of the group is sent to the terminal of the group by the server, so that after the terminal receives the paging message and the current cell of the terminal changes, it can determine whether it is located in the predefined area of the group. And performing different operations according to the determined situation, such as sending a paging response to the server or not sending a paging response, sending a message to the server to enter a predefined area or leaving the predefined area, thereby implementing a predefined area of PTT communication. The above-mentioned interaction between the server and the terminal is performed through the existing wireless IP network, and all the interaction information is user plane information for the communication network, and does not involve communication network control plane signaling. Therefore, this embodiment The method can realize the predefined area function of PTT communication without changing the existing wireless IP network, and the implementation cost is reduced.

FIG. 7 is a flowchart of Embodiment 7 of a PTT communication method according to the present invention. The execution subject of this embodiment is a terminal that receives a paging message. As shown in FIG. 7, the method in this embodiment may include:

Step 701: The terminal receives a paging message of the PTT communication of the group sent by the server, where the paging message carries the group identifier of the group and the predefined area information of the group.

Before step 701, a terminal in the group sends a PTT communication establishment request to the server, and the server sends a PTT communication permission establishment message to the terminal that sends the request, at this time, all the registered other terminals of the group will Receiving a paging message of the group PTT communication sent by the server.

If the terminal is not registered, the server cannot communicate with it over the wireless IP network, so the server does not send a paging message to the unregistered terminal. And if the terminal is registered after the group's PTT communication is established, the server will resend the paging message to it.

Step 702: Save the predefined area information of the group corresponding to the group identifier.

After receiving the paging message of the PTT communication, the terminal saves the group identifier carried in the paging message and the predefined area information of the group locally, so that the terminal can be based on the group during the PTT communication process. The predefined area information of the group performs different operations, such as returning or not returning a page response message to the server, sending a message leaving the predefined area to the server, or entering a message of a predefined area.

In this embodiment, the PTT communication paging message of the group sent by the terminal receiving server carries the group identifier and the predefined area information, so that the terminal can determine whether it is currently located in the predefined area of the group, according to the judgment. The result determines whether to send a paging response message to the server, thereby implementing a predefined area function of the PTT communication; all interactions between the server and the terminal are through existing The wireless IP network performs all the information about the user plane for the communication network, and does not involve the communication network control plane signaling. Therefore, the method of this embodiment does not change the existing wireless.

FIG. 8 is a flowchart of Embodiment 8 of the PTT communication method according to the present invention. The executor of this embodiment is a terminal that receives a paging message. As shown in FIG. 8, the method in this embodiment may include:

Step 801: The terminal receives a paging message of the PTT communication of the group sent by the server, where the paging message carries the group identifier of the group and the predefined area information of the group.

Step 802: Correspond to the group identifier, and save predefined area information of the group.

Step 803: Determine, according to the cell identifier of the cell in which the current cell is located, and the predefined area information, whether the current location is within the predefined area of the group.

Specifically, the terminal compares the cell identifier of the current cell with the cell identifier of the predefined area belonging to the group to determine whether it is currently located in a predefined area of the group.

Step 804: If the terminal is currently located in a predefined area of the group, send a paging response message to the server, where the paging response message carries the group identifier of the group.

After at least one terminal in the group sends a paging response message to the server, the PTT communication of the group can be successfully established. At this time, if a terminal in the group applies for the right to become the terminal, other terminals can receive. The media stream to the terminal.

Step 805: If the terminal is currently located outside the predefined area of the group, and after the terminal moves, determine whether the terminal enters according to the saved predefined area information and the cell identity of the terminal moving to the cell. A predefined area of the group.

Step 806: When the terminal enters a predefined area of the group, send a message to the server to enter a predefined area, where the message entering the predefined area carries the terminal identifier and the location of the terminal The group identity of the group is such that the server joins the terminal to the PTT communication of the group.

Step 807: When the terminal moves, determining, according to the saved predefined area information and the cell identifier of the terminal moving to the cell, whether the terminal leaves a predefined area of the group.

Step 808: When the terminal leaves the predefined area of the group, send a message to the server to leave the predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group A group identity of the group such that the server moves the terminal out of the PTT communication of the group. The specific scenarios of the steps 807 and 808 are as follows: The terminal moves to the outside of the predefined area of the group during the PTT communication of the group. At this time, the terminal sends a message to the server to leave the predefined area.

Step 809: Receive a call end message sent by the server, where the call end message carries a group identifier of the group.

Specifically, the call end message is sent by the server after receiving a call end request sent by any terminal of the group that is performing PTT communication.

Step 810: Delete pre-defined area information of the group that is saved locally.

The purpose of step 810 is to stop the terminal from entering the predefined area or leaving the predefined area when the terminal enters or leaves the predefined area of the group after the PTT communication of the group ends.

In this embodiment, the terminal receives the predefined area information of the group carried in the group PTT communication paging message sent by the server, and can determine whether the current cell is located in the predefined area when the current cell changes during the PTT communication process. Therefore, different operations can be performed according to the determined situation. Specifically, the terminal can use the predefined area information to determine whether it is currently located in a predefined area of the group when it moves, thereby sending a message to the server according to the determined situation. A predefined area or a message entering a predefined area, causing the server to move the terminal out or join the PTT communication of the group, thereby implementing a predefined area function of the PTT communication; all interactions between the server and the terminal are through the existing wireless IP All the interaction information performed by the network is user plane information for the communication network, and does not involve communication network control plane signaling. Therefore, the method of this embodiment can implement PTT communication without changing the existing wireless IP network. Predefined zone features reduce implementation costs.

FIG. 9 is a signaling flowchart of a ninth embodiment of a PTT communication method according to the present invention. For convenience of description, the embodiment of the present invention names a terminal that sends a PTT establishment request as an initiating terminal, and names another terminal that receives the paging message as a paging terminal. . The number of the paging terminals may be multiple. The embodiment of the present invention is described by taking one example as an example. As shown in FIG. 9, the method in this embodiment may include:

Step 901: The initiating terminal sends a PTT communication establishment request to the server, where the PTT communication establishment request carries the group identifier and the cell identifier of the cell where the terminal is currently located.

Step 902: The server queries, according to the group identifier, predefined area information of the group corresponding to the group identifier.

Step 903: The server determines whether the initiating terminal is located in a predefined area of the group. Inside.

Step 904: If the originating terminal is located outside a predefined area of the group, the server sends a PTT communication setup response including a PTT communication setup failure message to the initiating terminal.

Step 905: If the originating terminal is located in a predefined area of the group, the server sends a PTT communication setup response including the PTT communication permission establishment to the initiating terminal, where the PTT communication setup response carries the group Group ID of the group, predefined area information of the group.

Specifically, the server determines that the initiating terminal is located in a predefined area of the group, and when the PPT communication of the group is not established, sends a PTT communication setup response including the PTT communication permission establishment to the initiating terminal.

Step 906: The server sends a paging message to the other terminals of the group, where the paging message carries the group identifier of the group and the predefined area information of the group.

It should be noted that after step 905, step 906 is performed, and after step 904, the process ends. Step 907: The paging terminal determines, according to the cell identity of the current cell, whether it is currently located in a predefined area of the group.

Step 908: If the paging terminal is located in a predefined area of the group, send a paging response message to the server, where the paging response message carries the group identifier of the group.

Step 909: If the paging terminal is located outside a predefined area of the group, when the paging terminal moves into a predefined area of the group, send the predefined area to the server. The message that enters the predefined area carries the terminal identifier of the paging terminal and the group identifier of the group.

Step 910: The server adds the paging terminal to the PTT communication of the group.

Step 911: If the paging terminal moves again, when moving to a predefined area of the group, sending a message leaving the predefined area to the server, where the message leaving the predefined area carries The terminal identifier of the paging terminal and the group identifier of the group.

Step 912: The server moves the paging terminal out of the PTT communication of the group.

Step 913: If the initiating terminal moves outside the predefined area of the group, send a message to the server to leave the predefined area, where the message leaving the predefined area carries the terminal identifier of the initiating terminal and The group identifier of the group.

Step 914: The server moves the initiating terminal out of the PTT communication of the group.

Step 915: If the initiating terminal moves again, when moving to a predefined area of the group The message is sent to the server to enter the predefined area, and the message that enters the predefined area carries the terminal identifier of the originating terminal and the group identifier of the group.

Step 916: The server joins the initiating terminal to the PTT communication of the group.

Step 917: Any terminal that is performing PTT communication sends a call end request to the server.

Step 918: Send a call end message to all registered terminals.

Step 919: All registered terminals delete the locally reserved predefined area information of the group.

In this embodiment, the server can send the pre-defined area information of the group to all the registered terminals of the group when the PTT communication is established, so that the terminal can determine whether it is currently located in a predefined area of the group. Therefore, the function of PTT communication can be performed only within a predefined area; all interactions between the server and the terminal are performed through an existing wireless IP network, and all interaction information is user plane information for the communication network. The communication network control plane signaling is not involved. Therefore, the method in this embodiment can implement the predefined area function of the PTT communication without changing the existing wireless IP network, thereby reducing the implementation cost.

FIG. 10 is a schematic structural diagram of Embodiment 1 of the server of the present invention. As shown in FIG. 10, the server 1000 of this embodiment may include: a receiving module 11, a querying module 12, a determining module 13, and a sending module 14. The receiving module 11 is configured to receive a PTT communication setup request sent by the terminal, where the PTT communication setup request carries a group identifier and a cell identifier of a cell where the terminal is currently located, and the query module 12 is configured to use, according to the group And determining, by the determining module, the determining unit 13 , configured to determine, according to the pre-defined area information that is queried and the cell identifier of the cell where the terminal is currently located, whether the terminal is located The pre-defined area of the group; the sending module 14 is configured to send a PTT communication setup response to the terminal according to the determination result.

The server of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and has a corresponding function module, and the implementation principle thereof is similar to the embodiment shown in FIG. 1 , and details are not described herein again. The device of the embodiment, when the server receives the PTT communication establishment request sent by the terminal, queries and determines whether the terminal is located in a predefined area of the group for which the PTT communication is to be performed, and sends the terminal to the terminal according to different judgment results. Sending different PTT communication setup responses, all predetermined interaction information for implementing PTT communication is user plane information for the communication network, and does not involve communication network control. Face signaling, therefore, the method of the embodiment can implement the predefined area function of PTT communication without changing the existing wireless IP network, and the implementation cost is reduced.

In the actual implementation, the sending module 14 is specifically configured to: if the terminal is located in a predefined area of the group, send a PTT communication setup response to the terminal, where the PTT communication setup response is carried. a group identifier of the group, and predefined area information of the group.

The PTT communication setup response carries the group identity of the group and the predefined information of the group, so that the terminal of the group can determine for itself whether it is located in a predefined area of the group.

And if the terminal is located outside the predefined area of the group, the sending module 14 is specifically configured to: the PTT communication setup response sent to the terminal includes a message that the PTT communication establishment fails.

The server embodiment shown in FIG. 10, further, in a specific implementation, the sending module 14 is further configured to: if the PTT communication of the group corresponding to the group identifier is not established, to other terminals of the group Sending a paging message, where the paging message carries the group identifier of the group and the predefined area information of the group; the receiving module 11 is further configured to: receive the paging sent by other terminals of the group In response to the message, the paging response message carries the group identity of the group, and the paging response message is that the other terminal is determined to be within the predefined area according to the cell identity of the cell in which the current cell is located. Sent.

FIG. 11 is a schematic structural diagram of a second embodiment of a server according to the present invention. As shown in FIG. 11, the server 1100 of the present embodiment is based on the server structure shown in FIG. 10. Further, the receiving module 11 is further configured to receive the group. a message sent by the terminal of the group to leave the predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group identifier of the group; correspondingly, the server in this embodiment further includes: Module 15, a PTT communication for moving the terminal out of the group. Further, the receiving module 11 is further configured to: receive a message that is sent by the terminal of the group to enter a predefined area, where the message that enters the predefined area carries the terminal identifier of the terminal and the group of the group Correspondingly, the server in this embodiment further includes: an adding module 16, configured to join the terminal to the PTT communication of the group.

The server embodiment shown in FIG. 11 further, in a specific implementation, the receiving module 11 further The terminal that receives the group sends a call end request; the sending module 14 is further configured to send a call end message to all terminals of the group, so that all terminals of the group delete the pre-group Define area information.

The server of this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 2, and has corresponding functional modules. The implementation principle and technical effects are similar to the method embodiment shown in FIG. 2, and details are not described herein again.

FIG. 12 is a schematic structural diagram of Embodiment 1 of a terminal according to the present invention. The terminal corresponding to this embodiment is a terminal that sends a PTT communication setup request. As shown in FIG. 12, the terminal 1200 of this embodiment may include: a sending module 21, a receiving module 22, and a processing module 23, where the sending module 21 is configured to send a PTT communication establishment request to the server, where the PTT communication establishment request is Carrying the group identifier and the cell identifier of the cell where the terminal is currently located; the receiving module 22 is configured to receive a PTT communication setup response sent by the server, where the PTT communication setup response is that the server corresponds to the group identifier Pre-defined area information of the group and the cell identifier of the cell in which the terminal is currently located, determining whether the terminal is located in a predefined area of the group and transmitting according to the determination result; and processing module 23, configured to perform, according to the PPT The communication establishes a response to determine whether to join the PPT communication.

The terminal in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and has a corresponding function module, and the implementation principle thereof is similar to the embodiment shown in FIG. 3, and details are not described herein again. In the apparatus of this embodiment, the PTT communication setup request sent by the terminal to the server carries the group identifier and the current cell identifier of the terminal, so that the server can query the predefined area information of the group according to the group identifier, thereby determining the terminal. Whether it is located in a predefined area of the group, and receives a different PTT communication establishment response sent by the server to the terminal according to the judgment result, and implements a predefined area function in the PTT communication establishment phase; all interactions between the server and the terminal are passed In the existing wireless IP network, all the interaction information is user plane information for the communication network, and does not involve communication network control plane signaling. Therefore, the method of this embodiment may not change the existing wireless IP network. The implementation of the predefined area function of PTT communication reduces the implementation cost.

The terminal embodiment shown in FIG. 12, in a specific implementation, the PTT communication setup response received by the receiving module 22, when the PTT communication setup response is determined by the server, the terminal is located in a predefined area of the group. When sent outside, the PTT communication setup response includes a message that the PTT communication establishment failed.

The terminal embodiment shown in FIG. 12, further, in a specific implementation, is also used when The PTT communication setup response is sent when the server determines that the terminal is located within a predefined area of the group, and the UI communication setup response received by the receiving module 22 includes: a communication established message and a communication permission Establishing a message, and the ΡΤΤ communication establishment response carries a group identifier of the group, and predefined area information of the group.

FIG. 13 is a schematic structural diagram of Embodiment 2 of a terminal according to the present invention. The terminal corresponding to this embodiment is sent.

ΡΤΤ Communication establishes the requesting terminal. As shown in FIG. 13, the terminal 1300 of this embodiment may further include: a storage module 24, configured to save predefined area information of the group, and a regional monitoring module 25, When the terminal moves, determining whether the terminal leaves a predefined area of the group according to the saved predefined area information and a cell identifier of the terminal moving to the cell, and for, when the terminal moves again And determining, according to the saved predefined area information and the cell identifier of the terminal moving to the cell, whether the terminal enters a predefined area of the group; correspondingly, the sending module 21 is further configured to: if the area monitoring module 25 Determining that the terminal leaves the predefined area of the group, and sending a message to the server to leave the predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group a group identity, such that the server moves the terminal out of the group of communication; and if the area monitoring module 25 determines The terminal enters a predefined area of the group, and sends a message to the server to enter a predefined area, where the message entering the predefined area carries the terminal identifier of the terminal and the group a group identity such that the server joins the terminal to the group's communication.

Further, in the terminal of the embodiment, the receiving module 22 is further configured to: receive a call end message sent by the server, where the call end message carries the group identifier of the group; the terminal in this embodiment further includes deleting The module 26 is configured to delete the predefined area information of the group that is saved locally.

The terminal in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 4, and has a corresponding function module. The implementation principle and technical effects are similar to the method embodiment shown in FIG. 4, and details are not described herein again.

FIG. 14 is a schematic structural diagram of Embodiment 3 of a server according to the present invention. The device corresponding to this embodiment is a server device that sends a paging message to a paging terminal. As shown in FIG. 14, the server 1400 of this embodiment may include: a processing module 31 and a sending module 32, where the processing module 31 is configured to determine a UI communication that allows a group to be established; and a sending module 32 is configured to send the group The terminal of the group sends a paging message of the communication of the group, where the paging message carries the group identifier of the group and the group Predefined area information.

The device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 5, and has a corresponding function module, and the implementation principle thereof is similar to the method embodiment shown in FIG. 5, and details are not described herein again. The server of the embodiment carries the group identifier and the predefined area information of the group in the paging message sent by the server, so that the terminal can determine whether it is located in the predefined area, so that the terminal can enable the terminal to Performing different operations according to the determined situation, such as returning a page response or not returning a page response, and transmitting a message entering or leaving a predefined area of the group in a subsequent PTT communication process, thereby implementing a pre-PTT communication Defining the regional function; Because the above implementation of the predefined regional function, the information interaction between the server and the terminal can be implemented through the existing wireless IP network, and the information exchanged is the user's information for the wireless IP network, and The wireless IP network itself does not need to interact, nor does it involve control plane signaling in the communication network; that is, the server and the terminal in this embodiment can communicate through any existing wireless IP network, and does not need to change the existing communication. Any network element in the network, thus realizing the base of the existing mobile network Make up

PTT communication has the function of a predefined area, which reduces the implementation cost of PTT communication in a predefined area.

FIG. 15 is a schematic structural diagram of Embodiment 4 of a server according to the present invention. The device corresponding to this embodiment is a server device that sends a paging message to a paging terminal. As shown in FIG. 15, the server 1500 of the embodiment further includes: a receiving module 33, configured to receive a paging response message sent by the terminal of the group, where the paging is performed. The response message carries the group identifier of the group, and the paging response message is sent by the terminal after determining that the terminal is currently within the predefined area according to the cell identity of the current cell.

Further, the receiving module 33 is further configured to, after the paging response message sent by the terminal that receives the group, receive a message that is sent by the terminal of the group to leave a predefined area, where the leaving the predefined area The message carries the terminal identifier and the group identifier of the group; correspondingly, the message may further include: a removal module 34, configured to move the terminal out of the PTT communication of the group.

Further, the receiving module 33 is further configured to: after sending the paging message of the PTT communication of the group to the terminal of the group, or leaving the predefined area sent by the terminal receiving the group After receiving the message, the terminal that receives the predefined area is sent by the terminal of the group, and the message that enters the predefined area carries the terminal identifier and the group identifier. Correspondingly, the method further includes: adding module 35, The terminal joins the PTT communication of the group.

Further, the receiving module 33 is further configured to: send the paging sent by the terminal that receives the group After the response message, the call end request sent by the terminal of the group is received; the sending module 32 is further configured to send a call end message to all terminals of the group, so that all terminals of the group delete the group Predefined area information for the group.

The server of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 6, and has corresponding functional modules. The implementation principle and technical effects are similar to the method embodiment shown in FIG. 6, and details are not described herein again.

FIG. 16 is a schematic structural diagram of Embodiment 3 of a terminal according to the present invention. The terminal corresponding to this embodiment is a terminal that receives a paging message. As shown in FIG. 16, the terminal 1600 of this embodiment may include: a receiving module 41 and a storage module 42, where the receiving module 41 is configured to receive a paging message of a PTT communication of a group sent by a server, where the paging message is And carrying the group identifier of the group and the predefined area information of the group; the storage module 42 is configured to save the predefined area information of the group corresponding to the group identifier.

The terminal of the embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 7 , and has a corresponding function module, and the implementation principle thereof is similar to the embodiment shown in FIG. 7 , and details are not described herein again. The terminal in this embodiment carries the group identifier and the predefined area information in the PTT communication paging message of the group sent by the receiving server, so that the terminal can determine whether it is currently located in the predefined area of the group, according to The judgment result determines whether to send a paging response message to the server, thereby implementing a predefined area function of the PTT communication; all the interaction between the server and the terminal is performed through the existing wireless IP network, and all the interaction information is for the communication network. The user plane information is not related to the communication network control plane signaling. Therefore, the method in this embodiment can implement the predefined area function of the PTT communication without changing the existing wireless IP network, thereby reducing the implementation cost.

FIG. 17 is a schematic structural diagram of Embodiment 4 of a terminal according to the present invention. The terminal corresponding to this embodiment is a terminal that receives a paging message. As shown in FIG. 17, the terminal 1700 of the present embodiment may further include: an area monitoring module 43 and a sending module 44, and an area monitoring module 43 for using the current cell of the terminal, based on the terminal structure shown in FIG. The cell identifier and the predefined area information determine whether the terminal is currently located in a predefined area of the group; the sending module 44 is configured to: if the terminal is currently located in a predefined area of the group And sending a paging response message to the server, where the paging response message carries the group identifier of the group.

Further, the area monitoring module 43 is further configured to: if the terminal is currently located outside the predefined area of the group, and after the terminal moves, according to the saved predefined area information and the The cell identifier of the terminal moving to the cell determines whether the terminal enters a predefined area of the group; correspondingly, the sending module 44 is further configured to: when the area monitoring module 43 determines that the terminal enters a predefined area of the group Sending a message to the server to enter a predefined area, where the message entering the predefined area carries the terminal identifier of the terminal and the group identifier of the group, so that the server joins the terminal PTT communication of the group.

Further, the area monitoring module 43 is further configured to: after the sending module 44 sends a message to the server to enter a predefined area, or after sending the paging response message to the server, when the terminal moves, according to saving The pre-defined area information and the cell identity of the terminal moving to the cell determine whether the terminal leaves a predefined area of the group; the sending module 44 is further configured to: when the area monitoring module 43 determines that the terminal leaves the group And sending, by the server, a message that leaves the predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group identifier of the group, so that the server The terminal is moved out of the PTT communication of the group.

Further, the receiving module 41 is further configured to: receive a call end message sent by the server, where the call end message carries a group identifier of the group; the terminal in this embodiment further includes: a deleting module 45, configured to: Delete the predefined area information of the group saved locally.

The terminal of the embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 8, and the corresponding functional module is provided. The implementation principle and the technical effect are similar to the method embodiment shown in FIG. 8, and details are not described herein again.

FIG. 18 is a schematic structural diagram of Embodiment 1 of a communication system according to the present invention. As shown in FIG. 18, the system 1800 of this embodiment may include: a server, an originating terminal, and at least one paging terminal, where the initiating terminal establishes a PTT communication for sending. The requested terminal, the paging terminal is a terminal that receives the paging message. The server may use the structure of the server embodiment shown in FIG. 10 or FIG. 11 , and correspondingly, the technical solution of the method embodiment shown in FIG. 1 or FIG. 2 may be performed, and the implementation principle and the technical effect are similar. The initiating terminal can use the structure of the terminal embodiment shown in FIG. 12 or FIG. 13 , and correspondingly, the technical solution of the method embodiment shown in FIG. 3 or FIG. 4 can be executed, and the implementation principle and technology thereof are implemented. The effect is similar, and is not described here again; at least one paging terminal may use the structure of the terminal embodiment shown in FIG. 16 or FIG. 17, and correspondingly, the technology of the method embodiment shown in FIG. 7 or FIG. 8 may be executed. The implementation principle and technical effects of the solution are similar, and will not be described here.

FIG. 19 is a schematic structural diagram of Embodiment 2 of a communication system according to the present invention. As shown in FIG. 19, this embodiment is shown in FIG. The system 1900 can include: a server and at least one paging terminal, wherein the paging terminal is a terminal that receives the paging message. The server may use the structure of the server embodiment shown in FIG. 14 or FIG. 15 , and correspondingly, the technical solution of the method embodiment shown in FIG. 5 or FIG. 6 may be performed, and the implementation principle and the technical effect are similar. The structure of the terminal embodiment shown in FIG. 16 or FIG. 17 can be used, and correspondingly, the technical solution of the method embodiment shown in FIG. 7 or FIG. 8 can be implemented. The principle and technical effects are similar and will not be described here.

FIG. 20 is a schematic structural diagram of Embodiment 5 of the server according to the present invention. The server corresponding to this embodiment is a server that interacts with the originating terminal. As shown in FIG. 20, the server 2000 of this embodiment may include: a receiving circuit 2001, a transmitting circuit 2002, a memory 2003, and a processor 2004.

The memory 2003 stores the group identifier and the predefined area information of the at least one group. The receiving circuit 2001 is configured to receive the PTT communication setup request sent by the terminal, where the PTT communication setup request carries the group identifier and the current location of the terminal. The cell identifier of the cell is connected to the receiving circuit 2001, the transmitting circuit 2002, and the memory 2003, respectively, for performing the following operations: querying, according to the group identifier received by the receiving circuit 2001, the corresponding identifier of the group identifier from the memory 2003. Pre-defined area information of the group; determining, according to the queried predefined area information and the cell identifier received by the receiving circuit, whether the terminal is located in a predefined area of the group; 2002 sends a PPT communication setup response to the terminal.

In a specific implementation, the receiving circuit 2001 and the transmitting circuit 2002 may be two independent circuits, or may be integrated into a transmitting and receiving circuit.

Further, the processor 2004 sends a PTT communication setup response to the terminal by using the sending circuit 2002 according to the determination result, which may include: if the terminal is located in a predefined area of the group, sending a PTT communication to the terminal. Establishing a response, the PTT communication setup response carrying the group identifier of the group, the predefined area information of the group, where the PTT communication establishment response includes a PTT communication established message or a PTT communication permission establishment message And if the terminal is located outside the predefined area of the group, sending a PTT communication setup response to the terminal, where the PTT communication establishment response includes a message that the PTT communication establishment fails.

Further, if the terminal is located in a predefined area of the group, sending a PTT communication setup response to the terminal specifically includes: if the PTT communication of the group corresponding to the group identifier is established, The terminal sends a PTT communication established message; if the PTT communication of the group corresponding to the group identifier is not established, sending a PTT communication permission establishment message to the terminal. Further, if the PTT communication of the group corresponding to the group identifier is not established, the processor

The operation performed in 2004 further includes: sending an instruction to the sending circuit 2002, and sending, by the sending circuit 2002, a paging message to the other terminals of the group, where the paging message carries the group identifier of the group and the group The pre-defined area information of the group; correspondingly, the receiving circuit 2001 is specifically configured to: receive a paging response message sent by another terminal of the group, where the paging response message carries the group identifier of the group, where The paging response message is sent by the other terminal after determining that it is currently within the predefined area according to the cell identity of the cell in which it is currently located.

Further, the receiving circuit 2001 may be further configured to receive a message that is sent by the terminal of the group to leave a predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group of the group. Correspondingly, the processor 2004 is further configured to: move the terminal out of the group of communication.

Further, the receiving circuit 2001 may be further configured to: receive a message that is sent by the terminal of the group and enter a predefined area, where the message that enters the predefined area carries the terminal identifier of the terminal and the group of the group The group identifier is correspondingly used by the processor 2004 to join the terminal to the group communication.

Further, the receiving circuit 2001 may be further configured to: receive, by the terminal, the terminal to send a call end request; accordingly, the processor 2004 is further configured to send an instruction to the sending circuit 2002, to all the groups by using the sending circuit 2002. The terminal sends a call end message to cause all terminals of the group to delete the predefined area information of the group.

The server provided in this embodiment may be used to perform the technical solution implemented by the method shown in FIG. 1 or FIG. 2 and the part of the technical solution of the method embodiment shown in FIG. 9 that is executed by the server and interacts with the initiating terminal, and the implementation principle thereof is The technical effects are similar and will not be described here. Figure 20 is only a schematic diagram of the structure of a communication device provided by the present invention, and the specific structure can be adjusted according to actual conditions.

FIG. 21 is a schematic structural diagram of Embodiment 5 of a terminal according to the present invention. The terminal corresponding to this embodiment is an originating terminal. As shown in FIG. 21, the terminal 2100 of this embodiment may include: a receiver 2101, a transmitter 2102, a memory 2103, and a processor 2104.

The transmitter 2102 is configured to: send a ΡΤΤ communication establishment request to the server, where the ΡΤΤ communication establishment request carries a group identifier and a cell identifier of a cell where the terminal is currently located; and the receiver 2101 is configured to receive, by the server, ΡΤΤCommunication establishment response, the ΡΤΤ communication establishment response carrying the group identifier and the predefined area information of the group corresponding to the group identifier, The PTT communication establishment response is that the server determines, according to the predefined area information of the group corresponding to the group identifier, and the cell identifier of the cell where the terminal is currently located, whether the terminal is located in a predefined area of the group. And sending, according to the judgment result, the processor 2104, configured to determine, according to the ΡΡΤ communication establishment response, whether to join the ΡΡΤ communication of the group, for example, by prompting the user, in combination with the instruction information input by the user, determining whether to join the Group communication.

In a specific implementation, the receiver 2101 and the transmitter 2102 may be two independent functional modules, or may be integrated into a transceiver.

Further, if the ΡΤΤ communication establishment response is sent when the server determines that the terminal is located outside a predefined area of the group, the ΡΤΤ communication establishment response received by the receiver 2101 includes ΡΤΤ communication establishment The message of failure.

Further, if the ΡΤΤ communication establishment response is sent when the server determines that the terminal is located in a predefined area of the group, the ΡΤΤ communication establishment response received by the receiver 2101 includes Establishing a message or communication allows the message to be established, and the ΡΤΤ communication setup response carries the group identity of the group, the predefined area information of the group.

Further, the memory 2103 is specifically configured to save the predefined area information of the group after receiving the ΡΤΤ communication establishment response sent by the server.

Further, the processor 2104 is further configured to: when the terminal moves, determine, according to the saved predefined area information and the cell identifier that the terminal moves to the cell, whether the terminal leaves a predefined area of the group; When the result of the determination is yes, the instructing the sender 2102 sends a message to the server to leave the predefined area, where the message leaving the predefined area carries the terminal identifier and the group identifier of the terminal, so that the server will The terminal moves out of the group's communication.

Further, the processor 2104 is further configured to: when the terminal moves again, determine, according to the saved predefined area information, and the cell identifier that the terminal moves to the cell, whether the terminal enters a predefined area of the group. When the result of the determination is yes, the instructing the sender 2102 sends a message to the server to enter the predefined area, where the message entering the predefined area carries the terminal identifier and the group identifier, so that the server will use the terminal Join the group's communication.

Further, the receiver 2101 is further configured to: receive a call end message sent by the server, where the call end message carries a group identifier of the group; and the processor 2104 is further configured to: delete the locally saved group Group of predefined area letters, 3⁄4.

The terminal provided in this embodiment may be used to execute the technical implementation of the method shown in FIG. 3 or FIG. And the part of the technical solution of the method embodiment shown in FIG. 9 corresponding to the execution of the terminal, the implementation principle and the technical effect are similar, and details are not described herein again. FIG. 21 is only a schematic diagram of the structure of the communication device provided by the present invention, and the specific structure may be adjusted according to actual conditions.

FIG. 22 is a schematic structural diagram of Embodiment 6 of the server according to the present invention. The server corresponding to this embodiment is a server that interacts with the paging terminal. As shown in FIG. 22, the server 2200 of this embodiment may include: a receiving circuit 2201, a transmitting circuit 2202, a memory 2203, and a processor 2204.

The memory 2203 stores the group identifier and the predefined area information of the at least one group; the processor 2204 is configured to determine the PTT communication that allows the group to be established, and instruct the sending circuit 2202 to send the group to the terminal of the group. The paging message of the PTT communication, where the paging message carries the group identifier of the group and the predefined area information of the group.

In a specific implementation, the receiving circuit 2201 and the transmitting circuit 2202 may be two independent circuits, or may be integrated into a transmitting and receiving circuit.

Further, the receiving circuit 2201 is configured to receive a paging response message sent by the terminal of the group, where the paging response message carries a group identifier of the group, and the paging response message is that the terminal is in the terminal It is determined to be sent after being within the predefined area according to the cell identity of the current cell of the current cell.

Further, after receiving the paging response message sent by the terminal of the group, the receiving circuit 2201 is further configured to: receive a message that is sent by the terminal of the group and leave a predefined area, where the message leaves the predefined area. The terminal identifier of the terminal and the group identifier of the group are carried in; correspondingly, the processor 2204 is further configured to: remove the terminal from the PTT communication of the group.

Further, after transmitting the paging message of the PTT communication of the group to the terminal of the group, or after receiving the message of the predefined area sent by the terminal of the group, the receiving circuit 2201 further uses And receiving a message that is sent by the terminal of the group to enter a predefined area, where the message that enters the predefined area carries the terminal identifier of the terminal and the group identifier of the group; correspondingly, the processor 2204 Also used to join the terminal to the PTT communication of the group.

Further, the receiving circuit 2201 is further configured to receive a call end request sent by the terminal of the group. Correspondingly, the processor 2204 is further configured to instruct the transmitter 2202 to send a call end message to all terminals of the group, to All terminals of the group are deleted from the predefined area information of the group.

The server provided in this embodiment may be used to implement the technology implemented by the method shown in FIG. 5 or FIG. The scheme and the part of the technical solution of the method embodiment shown in FIG. 9 that is performed by the server and interact with the paging terminal are similar in implementation principle and technical effects, and are not described herein again. FIG. 22 is only a schematic diagram of the structure of the communication device provided by the present invention, and the specific structure may be adjusted according to actual conditions.

FIG. 23 is a schematic structural diagram of Embodiment 6 of a terminal according to the present invention. The terminal corresponding to this embodiment is a paging terminal. As shown in FIG. 23, the terminal 2300 of this embodiment may include: a receiver 2301, a transmitter 2302, a memory 2303, and a processor 2304.

The receiver 2301 is configured to receive a paging message of the PTT communication of the group sent by the server, where the paging message carries the group identifier of the group and the predefined area information of the group; 2304. For corresponding to the group identifier, save the predefined area information of the group on the memory 2303.

In a specific implementation, the receiver 2301 and the transmitter 2302 may be two independent functional modules, or may be integrated into a transceiver.

Further, the processor 2304 is configured to determine, according to the cell identifier of the current cell and the predefined area information, whether the current location is within the predefined area of the group; if the terminal is currently located in the group Within the predefined area, the instructing transmitter 2302 sends a paging response message to the server, where the paging response message carries the group identity of the group.

Further, if the terminal is currently located outside the predefined area of the group, and the terminal moves, the processor 2304 is further configured to: move, according to the saved predefined area information, the cell that the terminal moves to the cell Determining whether the terminal enters a predefined area of the group; when the terminal enters a predefined area of the group, instructing the transmitter 2302 to send a message to the server to enter a predefined area, The message entering the predefined area carries the terminal identifier of the terminal and the group identifier of the group, so that the server joins the terminal to the PTT communication of the group.

Further, after the sending the message to the server to enter the predefined area, or after sending the paging response message to the server, when the terminal moves, the processor 2304 is further configured to: according to the saved pre Defining the area information and the cell identity of the terminal moving to the cell to determine whether the terminal leaves a predefined area of the group; when the terminal leaves the predefined area of the group, instructing the transmitter 2302 to The server sends a message leaving the predefined area, where the message leaving the predefined area carries the terminal identifier of the terminal and the group identifier of the group, so that the server moves the terminal out of the group. PTT communication. Further, after the paging message of the PTT communication of the group sent by the receiving server, the receiver 2301 is further configured to receive a call end message sent by the server, where the call end message carries the group Correspondingly, the processor 2304 is further configured to delete the predefined area information of the group saved on the memory 2303.

The terminal provided in this embodiment may be used to perform the technical solution implemented by the method shown in FIG. 7 or FIG. 8 and the corresponding part of the paging terminal in the technical solution of the method embodiment shown in FIG. 9, and the implementation principle and technical effect are similar. , will not repeat them here. Figure 23 is only a schematic diagram of the structure of the communication device provided by the present invention, and the specific structure can be adjusted according to the actual situation.

The invention further provides a computer program product embodiment 1 comprising a computer readable medium, the computer readable medium comprising a set of program code for performing the method as described in the method embodiment shown in Fig. 1 or Fig. 2.

The invention further provides a computer program product embodiment 2, comprising a computer readable medium, the computer readable medium comprising a set of program code for performing the method as described in the method embodiment shown in FIG. 3 or FIG.

The invention further provides a computer program product embodiment 3, comprising a computer readable medium, the computer readable medium comprising a set of program code for performing the method as described in the method embodiment shown in FIG. 5 or FIG.

The invention further provides a fourth embodiment of a computer program product, comprising a computer readable medium comprising a set of program code for performing the method as described in the method embodiment shown in Fig. 7 or Fig. 8.

One of ordinary skill in the art will appreciate that all or a portion of the steps to implement the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A push-to-talk PTT communication method, characterized by including:

The server receives the PTT communication establishment request sent by the terminal, and the PTT communication establishment request carries the group identification and the cell identification of the cell where the terminal is currently located;

According to the group identifier, query the predefined area information of the group corresponding to the group identifier; according to the queried predefined area information and the cell identifier of the cell where the terminal is currently located, determine whether the terminal is located in the Within a predefined area of the group;

According to the judgment result, a PTT communication establishment response is sent to the terminal.

2. The method according to claim 1, characterized in that, based on the judgment result, sending a PTT communication establishment response to the terminal includes:

If the terminal is located within the predefined area of the group, send a PTT communication establishment response to the terminal, where the PTT communication establishment response carries the group identifier of the group and the predefined definition of the group. Area information, wherein the PTT communication establishment response includes a PTT communication established message or a PTT communication allowed to be established message.

3. The method according to claim 2, wherein if the terminal is located within a predefined area of the group, sending a PTT communication establishment response to the terminal specifically includes:

If the PTT communication of the group corresponding to the group identifier has been established, then sending a PTT communication established message to the terminal;

If the PTT communication of the group corresponding to the group identifier is not established, a PTT communication permission establishment message is sent to the terminal.

4. The method according to claim 3, characterized in that, if the PTT communication of the group corresponding to the group identifier is not established, it further includes:

Send a paging message to other terminals of the group, where the paging message carries the group identifier of the group and the predefined area information of the group;

Receive paging response messages sent by other terminals of the group. The paging response messages carry the group identifier. The paging response messages are determined by the other terminals based on the cell identifier of the cell where they are currently located. Sent after the current location is within the predefined area.

5. The method according to claim 1, characterized in that, based on the judgment result, sending a PTT communication establishment response to the terminal includes:

If the terminal is located outside the predefined area of the group, send a PTT message to the terminal The PTT communication establishment response includes a message that the PTT communication establishment fails.

6. The method according to any one of claims 1 to 5, wherein when any terminal of the group leaves the predefined area of the group, the method further includes:

Receive a message leaving a predefined area sent by the leaving terminal, where the message leaving the predefined area carries the terminal identification of the leaving terminal and the group identification of the group;

The departing terminal is removed from the PTT communication of the group.

7. The method according to any one of claims 1 to 6, wherein when any terminal of the group enters the predefined area of the group, the method further includes:

Receive a message sent by the entering terminal to enter the predefined area, where the message entering the predefined area carries the terminal identification of the entering terminal and the group identification of the group;

The incoming terminal is added to the PTT communication of the group.

8. The method according to any one of claims 1 to 7, characterized in that when any terminal of the group wants to end PPT communication, the method further includes:

Receive the call end request sent by the terminal that wants to end the PPT communication;

Send a call end message to all terminals in the group, so that all terminals in the group delete the predefined area information of the group.

9. A PTT communication method, characterized by including:

The terminal sends a PTT communication establishment request to the server, and the PTT communication establishment request carries the group identification and the cell identification of the cell where the terminal is currently located;

Receive a PTT communication establishment response sent by the server, where the PTT communication establishment response is based on the predefined area information of the group corresponding to the group identification and the cell identification of the cell where the terminal is currently located, and determine the Whether the terminal is located in the predefined area of the group and sent based on the judgment result;

Determine whether to join the PPT communication of the group according to the PPT communication establishment response.

10. The method according to claim 9, wherein the PTT communication establishment response is sent when the server determines that the terminal is located outside the predefined area of the group, wherein the PTT communication The establishment response includes a message that the PTT communication establishment failed.

11. The method according to claim 9, wherein the PTT communication establishment response is sent when the server determines that the terminal is located within a predefined area of the group, and the PTT communication establishment response The response includes a PTT communication established message or a PTT communication allowed message, And the PTT communication establishment response carries the group identifier and predefined area information of the group.

12. The method according to claim 11, characterized in that, after receiving the PTT communication establishment response sent by the server, further comprising:

Predefined area information for the group is saved.

13. The method according to claim 12, characterized in that when the terminal moves, it further includes:

Determine whether the terminal leaves the predefined area of the group based on the saved predefined area information and the cell identification of the cell to which the terminal moves;

When the judgment result is yes, a message leaving the predefined area is sent to the server. The message leaving the predefined area carries the terminal identification and group identification of the terminal, so that the server moves the terminal out. PTT communications for the group.

14. The method according to claim 13, characterized in that, after sending the message of leaving the predefined area to the server, it further includes:

When the terminal moves again, determine whether the terminal enters the predefined area of the group based on the saved predefined area information and the cell identification of the cell to which the terminal moves;

When the judgment result is yes, a message entering the predefined area is sent to the server. The message entering the predefined area carries the terminal identification and the group identification, so that the server adds the terminal to the group. PTTT Communications.

15. The method according to claim 12, wherein after saving the predefined area information of the group, it further includes:

Receive a call end message sent by the server, where the call end message carries the group identifier of the group;

Delete the locally saved predefined area information of the group.

16. A PTT communication method, characterized by including:

The server determines that PTT communications to establish the group are allowed;

A paging message for PTT communication of the group is sent to the terminal of the group, where the paging message carries the group identifier and predefined area information of the group.

17. The method according to claim 16, characterized in that, after sending the paging message of the PTT communication of the group to the terminal of the group, it further includes:

Receive a paging response message sent by a terminal of the group, where the paging response message carries The group identifier of the group, the paging response message is sent by the terminal after judging that it is currently within the predefined area based on the cell identifier of its current cell.

18. The method according to claim 16 or 17, characterized in that when any terminal of the group leaves the predefined area of the group, it further includes:

The departing terminal is removed from the PTT communication of the group.

19. The method according to any one of claims 16 to 18, characterized in that when any terminal of the group enters the predefined area of the group, it further includes:

The incoming terminal is added to the PTT communication of the group.

20. The method according to any one of claims 16 to 19, characterized in that when any terminal of the group wants to end PPT communication, it also includes:

21. A PTT communication method, characterized by including:

The terminal receives a paging message for PTT communication of the group sent by the server, where the paging message carries the group identifier of the group and the predefined area information of the group;

Corresponding to the group identifier, predefined area information of the group is saved.

22. The method according to claim 21, wherein after the terminal receives the paging message of the group's PTT communication sent by the server, it further includes:

Determine whether the terminal is currently located within the predefined area of the group according to the cell identifier of the cell where the terminal is currently located and the predefined area information;

If the terminal is currently located within the predefined area of the group, send a paging response message to the server, where the paging response message carries the group identifier of the group.

23. The method according to claim 22, characterized in that if the terminal is currently located outside the predefined area of the group and after the terminal moves, it further includes:

The terminal is determined based on the saved predefined area information and the cell identifier of the cell to which the terminal moves. Whether the terminal enters the predefined area of the group;

When the terminal enters the predefined area of the group, a message entering the predefined area is sent to the server, where the message entering the predefined area carries the terminal identification of the terminal and the group. group identification, so that the server adds the terminal to the PTT communication of the group.

24. The method according to claim 22 or 23, characterized in that when the terminal moves, it further includes:

Determine whether the terminal leaves the predefined area of the group according to the saved predefined area information and the cell identification of the cell to which the terminal moves;

When the terminal leaves the predefined area of the group, a message leaving the predefined area is sent to the server, where the message leaving the predefined area carries the terminal identification of the terminal and the group name of the group. Group identification, so that the server removes the terminal from the PTT communication of the group.

25. The method according to any one of claims 21 to 24, characterized in that, after receiving the paging message of the group's PTT communication sent by the server, it further includes:

Delete the locally saved predefined area information of the group.

26. A server, characterized by including:

A receiving module, configured to receive a PTT communication establishment request sent by the terminal, where the PTT communication establishment request carries a group identity and a cell identity of the cell where the terminal is currently located;

A query module, configured to query the predefined area information of the group corresponding to the group identifier according to the group identifier;

A judgment module, configured to judge whether the terminal is located in the predefined area of the group based on the queried predefined area information and the cell identifier of the cell where the terminal is currently located;

A sending module, configured to send a PTT communication establishment response to the terminal according to the judgment result.

27. The server according to claim 26, wherein when the terminal is located within a predefined area of the group, the PTT communication establishment response includes a PTT communication established message or a PTT communication allowed establishment message. , and the PTT communication establishment response carries the group identifier and predefined area information of the group.

28. The server according to claim 26, characterized in that the sending module specifically uses At:

29. The server according to claim 28, wherein the sending module is further configured to: if the PTT communication of the group corresponding to the group identifier is not established, send a search request to other terminals of the group. A paging message, the paging message carries the group identifier of the group and the predefined area information of the group;

The receiving module is also configured to receive paging response messages sent by other terminals of the group, where the paging response messages carry the group identifier of the group, and the paging response messages are the messages sent by other terminals of the group. The terminal sends it after judging that it is currently within the predefined area based on the cell identity of the cell where it is currently located.

30. The server according to claim 26, wherein when the terminal is located outside the predefined area of the group, the PTT communication establishment response includes a PTT communication establishment failure message.

31. The server according to any one of claims 26 to 30, characterized in that when any terminal of the group leaves the predefined area of the group,

The receiving module is also configured to receive a message leaving a predefined area sent by the leaving terminal, where the message leaving the predefined area carries the terminal identification of the leaving terminal and the group identification of the group. ;

The server further includes: a removal module, configured to remove the departing terminal from the PTT communication of the group.

32. The server according to any one of claims 26 to 31, characterized in that when any terminal of the group enters the predefined area of the group,

The receiving module is also configured to receive a message sent by the entering terminal to enter the predefined area, where the message entering the predefined area carries the terminal identification of the entering terminal and the group identification of the group. ;

The server further includes: a joining module, configured to add the incoming terminal to the PTT communication of the group.

33. The server according to any one of claims 26 to 32, characterized in that when any terminal of the group wants to end PPT communication,

The receiving module is also used to receive a call end request sent by the terminal that wants to end the PPT communication;

The sending module is also configured to send a call end message to all terminals in the group, so that all terminals in the group delete the predefined area information of the group.

34. A terminal, characterized by including:

A sending module, configured to send a PTT communication establishment request to the server, where the PTT communication establishment request carries the group identity and the cell identity of the cell where the terminal is currently located;

A receiving module, configured to receive a PTT communication establishment response sent by the server, where the PTT communication establishment response is the predefined area information of the group corresponding to the group identification by the server and the cell of the cell where the terminal is currently located. Identification, which is sent by judging whether the terminal is located in the predefined area of the group and based on the judgment result;

A processing module, configured to establish a response based on the PPT communication and determine whether to join the PPT communication.

35. The terminal according to claim 34, wherein when the PTT communication establishment response is sent when the server determines that the terminal is located outside the predefined area of the group, the PTT The communication establishment response includes a message that PTT communication establishment failed.

36. The terminal according to claim 34, wherein when the PTT communication establishment response is sent when the server determines that the terminal is located within a predefined area of the group, the PTT The communication establishment response includes a PTT communication established message and a PTT communication allowed to be established message, and carries the group identifier and predefined area information of the group.

37. The terminal according to claim 36, further comprising:

A storage module configured to save predefined area information of the group.

38. The terminal according to claim 37, further comprising:

An area monitoring module, configured to determine whether the terminal leaves the predefined area of the group based on the saved predefined area information and the cell identification of the cell to which the terminal moves when the terminal moves;

The sending module is also configured to, if the area monitoring module determines that the terminal leaves the predefined area of the group, send a message leaving the predefined area to the server, and the leaving predefined area The message defining the area carries the terminal identification of the terminal and the group identification of the group, so that the server moves the terminal out of the PTT communication of the group.

39. The terminal according to claim 38, wherein the area monitoring module is further configured to, when the terminal moves again, determine according to the saved predefined area information and the cell identifier of the cell to which the terminal moves. Determine whether the terminal enters a predefined area of the group;

The sending module is also configured to, if the area monitoring module determines that the terminal enters the predefined area of the group, send a message of entering the predefined area to the server, in the message of entering the predefined area. The terminal identifier of the terminal and the group identifier of the group are carried, so that the server adds the terminal to the PTT communication of the group.

40. The terminal according to claim 37, characterized in that,

The receiving module is also configured to receive a call end message sent by the server, where the call end message carries the group identifier of the group;

It also includes: a deletion module, configured to delete the locally saved predefined area information of the group.

41. A server, characterized by including:

A processing module, used to determine the PTT communication that is allowed to establish the group;

A sending module configured to send a paging message for PTT communication of the group to the terminal of the group, where the paging message carries the group identifier of the group and the predefined area information of the group. .

42. The server according to claim 41, further comprising:

A receiving module, configured to receive a paging response message sent by a terminal of the group, where the paging response message carries a group identifier of the group, and the paging response message is a response of the terminal according to its current The cell identifier of the cell is sent after it is determined that the cell is currently within the predefined area.

43. The server according to claim 42, wherein when any terminal of the group leaves the predefined area of the group, the receiving module is further configured to receive the message sent by the leaving terminal. A message leaving the predefined area, the message leaving the predefined area carries the terminal identification of the leaving terminal and the group identification of the group;

44. The server according to any one of claims 41 to 43, wherein when any terminal of the group enters the predefined area of the group, the receiving module is also used to receive The message entering the predefined area sent by the entering terminal, the message entering the predefined area carries the terminal identification of the incoming terminal and the group identification of the group;

The server also includes: a joining module, adding the incoming terminal to the PTT communication of the group.

45. The server according to any one of claims 41 to 44, characterized in that when any terminal of the group wants to end PPT communication,

The receiving module is also configured to, after receiving the paging response message sent by the terminal that wants to end the PPT communication, receive a call end request sent by the terminal of the group;

46. A terminal, characterized in that it includes:

A receiving module, configured to receive a paging message for PTT communication of the group sent by the server, where the paging message carries the group identifier of the group and the predefined area information of the group;

A storage module, configured to correspond to the group identifier and store predefined area information of the group.

47. The terminal according to claim 46, further comprising:

An area monitoring module, configured to determine whether the terminal is currently located within the predefined area of the group based on the cell identifier of the current cell of the terminal and the predefined area information;

A sending module, configured to send a paging response message to the server if the terminal is currently located within a predefined area of the group, where the paging response message carries the group identifier of the group.

48. The terminal according to claim 47, wherein the area monitoring module is further configured to: if the terminal is currently located outside the predefined area of the group and after the terminal moves, according to the saved The predefined area information and the cell identity of the cell to which the terminal moves are used to determine whether the terminal enters the predefined area of the group;

The sending module is also configured to, when the area monitoring module determines that the terminal enters the predefined area of the group, send a message of entering the predefined area to the server, in the message of entering the predefined area. The terminal identifier of the terminal and the group identifier of the group are carried, so that the server adds the terminal to the PTT communication of the group.

49. The terminal according to claim 47 or 48, wherein the area monitoring module is further configured to: in the sending module, send a message entering a predefined area to the server, or send a message to the server to the server. After sending the paging response message, when the terminal moves, according to the saved preset defining area information and a cell identity of the cell to which the terminal moves to determine whether the terminal leaves the predefined area of the group;

The sending module is also configured to: when the area monitoring module determines that the terminal leaves the predefined area of the group, send a message leaving the predefined area to the server, in which the message leaving the predefined area The terminal identifier of the terminal and the group identifier of the group are carried, so that the server moves the terminal out of the PTT communication of the group.

50. The terminal according to any one of claims 46 to 49, characterized in that,

The receiving module is also configured to, after receiving the paging message of the PTT communication of the group sent by the server, receive a call end message sent by the server, where the call end message carries the group name of the group. logo;

51. A communication system, characterized in that it includes: a server according to any one of claims 26 to 33, a terminal according to any one of claims 34 to 40, and at least one terminal according to claim 46 Any of ~50 terminals.

52. A communication system, characterized in that it includes: a server according to any one of claims 41 to 45 and at least one terminal according to any one of claims 46 to 50.