CN101155388B - A service message processing method and mobile switching center - Google Patents

Abstract

A service processing method and a mobile switching center are disclosed in the present invention. In the present invention, in a group call channel mode modifying flow, the mobile switching center MSC sends voice group call service/voice broadcast service assignment request (VGCS/VBS ASSIGNMENT REQUEST) message corresponding to the group call sponsor mobile platform locating cell to a base station subsystem after receiving the assignment complete (ASSIGNMENT COMPLETE) message special for connection corresponding to the sponsor mobile platform, implementing group call or signaling sequence initiated by the broadcast call through the channel mode modifying course is clarified, thereby it can implement through the channel mode modifying course to adding the sponsor mobile platform into the group channel to talk.

Description

A service message processing method and mobile switching center

technical field

The invention relates to the field of mobile communication, in particular to a service message processing technology.

Background technique

Voice Group Call Service (Voice Group Call Service, referred to as "VGCS") and Voice Broadcast Service (Voice Broadcast Service, referred to as "VBS") are both multi-party voice communication methods in the field of mobile communication, breaking through the limitations of point-to-point communication, Ability to quickly set up calls. These two services can be collectively referred to as group call (or group call) services.

Simply put, VGCS is to realize the business that multiple people can speak and more people can be listeners (the number of listeners is unlimited).

There are two types of business members in the VGCS business, that is, dispatchers and business users. The dispatcher can be a fixed network user or a mobile user, and participate in group call voice communication through the dedicated channel established by the network. In the existing GSM 800M digital trunking system (GSM Trunk 800M, referred to as "GT800") standard, the VGCS service There may be no dispatcher or a maximum of five dispatchers; service users refer to mobile users who subscribe to the VGCS service, the number is not limited, and participate in group call voice communication through the group call channel in the group call area.

The VGCS service only allows one service user and up to five dispatchers to speak at the same time at any time, while other service users who are not in the speaking state are called group call listeners. Group call listeners can press the Push To Talk ("PTT" for short) button on the mobile terminal to realize the operation of grabbing the uplink service channel according to the principle of "first come, first served". If you succeed, you can get the right to speak and participate in the speech. Other group call listeners can continue to grab the uplink service channel only when the uplink service channel is idle. Dispatchers have their own dedicated channel and are available to speak at any time.

VGCS allows users to establish a call to a group of users belonging to a specified service area and group ID (Group ID). During the call, all dispatchers can speak, but all business users occupy an uplink channel. The service area can be composed of several cells belonging to the same Mobile Switching Center (MSC for short) or different MSCs. When calling, each relevant cell has a group call channel, and the uplink is only used by the current speaker (group transmission mode), all listeners wait on the downlink (group receiving mode), and the relevant group call notification messages are broadcast on the notification channel NCH (Notification Channel).

For a group call involving multiple MSCs, one of the MSCs is responsible for call management, which we call Anchor MSC, and the other MSCs are Relay MSCs. Anchor MSC is responsible for establishing all connections, including the connection to the designated cell of this MSC, related Relay MSC and dispatching station, and completes the distribution of voice through a conference bridge. Only one link needs to be established from the Relay MSC to the Anchor MSC, and the Relay MSC is responsible for the distribution of the downlink voice of the cell to which it belongs.

VBS and VGCS services are basically similar, the main difference is: only the call initiator can speak during the VBS call, and other members are always in the receiving state. The speaking user does not need to press the PTT key.

The mobile station initiates a group call or broadcast call, and the network side assigns the initiator mobile station to another dedicated traffic channel (Traffic Channel, "TCH" for short) to speak while establishing a group call control connection. For a group call, after releasing the uplink on the dedicated channel, the network side assigns the originator mobile station to the group call channel, and the originally occupied dedicated TCH is released; There is talk on the channel.

Therefore, for the initiation of a group call, the cell where the initiator mobile station is located needs two TCH channels: the dedicated TCH channel occupied by the initiator mobile station and the group call channel of the cell; Two TCH channels are always needed in the cell: the dedicated TCH channel occupied by the speaker's mobile station and the group call channel of the cell. This implementation solution causes a certain waste of wireless channel resources.

In the existing specification, when a group call or a broadcast call is initiated, the Base Station Subsystem (BSS) can modify the dedicated channel of the mobile station of the group call or broadcast call initiator to a group call channel, and pass the channel The mode modification procedure allows the initiator mobile station to join the group call channel to speak. This implementation scheme can be implemented in the process of initiating a group call or a broadcast call, and only one TCH channel needs to be allocated in the cell where the initiator mobile station is located, which saves radio channel resources.

However, for the above solution, the existing specification does not clearly realize the signaling sequence of group call or broadcast call initiation through the channel mode modification process. The description in the specification may not allow the initiator mobile station to join the group call channel to speak through the channel mode modification process.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a service message processing method and a mobile switching center.

In order to achieve the above object, an embodiment of the present invention provides a service message processing method, including the steps: in the process of modifying the group call channel mode, the mobile switching center MSC receives the dedicated connection corresponding to the mobile station of the group call initiator After completing the assignment of the ASSIGNMENT COMPLETE message, send the voice group call/broadcast service assignment request VGCS/VBS ASSIGNMENT REQUEST message corresponding to the cell where the group call initiator mobile station is located to the base station subsystem BSS.

An embodiment of the present invention provides a mobile switching center, including a message sending module, which is used to receive the ASSIGNMENT COMPLETE message on the dedicated connection corresponding to the mobile station of the group call initiator in the process of modifying the group call channel mode Afterwards, send a voice group call/broadcast service assignment request VGCS/VBS ASSIGNMENT REQUEST message corresponding to the cell where the group call initiator mobile station is located to the base station subsystem BSS.

Compared with the prior art, in the technical solution of the embodiment of the present invention, the signaling sequence for initiating a group call or broadcast call through the channel mode modification process is clarified, so that the initiator mobile station can join the group call through the channel mode modification process. Call channel to speak.

Description of drawings

FIG. 1 is a schematic diagram of a signaling flow for implementing group call or broadcast call initiation through a channel mode modification process according to a preferred embodiment 1 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

In the service message processing method and the mobile switching center provided by the embodiment of the present invention, in the group call channel mode modification process, the mobile switching center MSC completes ASSIGNMENT COMPLETE after receiving the assignment on the dedicated connection corresponding to the mobile station of the group call initiator After the message, the voice group call/broadcast service assignment request VGCS/VBS ASSIGNMENT REQUEST message of the cell where the mobile station of the group call initiator is located is sent to the base station subsystem BSS. Timing sequence, so that the initiator mobile station can join the group call channel to speak through the channel mode modification process.

FIG. 1 is a schematic diagram of a signaling flow for implementing group call or broadcast call initiation through a channel mode modification process according to a preferred embodiment 1 of the present invention.

Step 101, during the VGCS/VBS initiation process, the group call originator mobile station MS sends a channel request CHANNEL REQUEST message to the BSS;

Step 102: The BSS assigns the mobile station of the group call initiator to the assigned independent dedicated control channel (Stand-alone Dedicated Control Channel, referred to as "SDCCH");

Step 103: MSC sends an assignment request ASSIGNMENT REQUEST message on the dedicated connection corresponding to the mobile station of the group call initiator, and the assignment request message carries the group call reference group callreference information, which is used to notify the BSS that the connection corresponding to the assignment request message corresponds to It is the dedicated connection corresponding to the mobile station of the group call initiator;

Step 104: The cell where the mobile station of the group call initiator is located establishes a dedicated channel and assigns the mobile station of the group call initiator to the dedicated channel;

Step 105: The BSS sends an ASSIGNMENT COMPLETE message to the MSC on the dedicated connection corresponding to the mobile station of the group call initiator;

Step 106: MSC sends a voice group call/broadcast service assignment request VGCS/VBS ASSIGNMENT REQUEST message corresponding to the cell where the group call initiator mobile station is located to the BSS, and establishes a group call resource control connection;

Step 107: The BSS starts the mode modification process, modifies the mode of the dedicated channel corresponding to the group call initiator mobile station, and modifies the dedicated channel type to the group call channel type;

The specific process can be: BSS sends a channel mode modification CHANNEL MODE MODIFY message to the group call initiator mobile station, and the group call initiator mobile station returns a channel mode modification confirmation CHANNEL MODE MODIFY ACKNOWLEDGE message to the BSS after completing the mode modification, and transfers to the group call sending mode;

Step 108: The BSS sends a CLEAR REQUEST message to the MSC, requesting the MSC to release the dedicated connection.

Preferred Embodiment 2 of the present invention: a mobile switching center, including a message sending module, used for, in the process of modifying the group call channel mode, receiving the assignment complete ASSIGNMENT COMPLETE message on the dedicated connection corresponding to the mobile station of the group call initiator After that, send the voice group call/broadcast service assignment request VGCS/VBSASSIGNMENT REQUEST message of the cell where the mobile station corresponding to the group call initiator is located to the base station subsystem BSS.

The above message sending module is further used to send an assignment request ASSIGNMENT REQUEST message on the dedicated connection corresponding to the mobile station of the group call initiator, and the assignment request message carries group call reference information, and is used to notify the BSS that the assignment request message corresponds to The connection corresponds to the dedicated connection corresponding to the mobile station of the group call initiator.

Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the present invention. The spirit and scope of the invention.

Claims (6)

1. A business message processing method, characterized in that, comprising steps: In the process of modifying the group call channel mode, after receiving the ASSIGNMENT COMPLETE message on the dedicated connection corresponding to the mobile station of the group call initiator, the mobile switching center MSC sends the message corresponding to the mobile station of the group call initiator to the base station subsystem BSS. Voice group call/broadcast service assignment request VGCS/VBS ASSIGNMENT REQUEST message in the cell, establish a group call resource control connection, so that the BSS starts the mode modification process after receiving the VGCS/VBS ASSIGNMENT REQUEST message, for the described The mode of the dedicated channel corresponding to the group call initiator mobile station is modified, and the type of the dedicated channel is changed to the type of the group call channel. 2. The method according to claim 1, wherein, before the BSS sends the ASSIGNMENTCOMPLETE message to the MSC on the dedicated connection corresponding to the group call originator mobile station, further comprising the steps of: The MSC sends an assignment request ASSIGNMENT REQUEST message on the dedicated connection corresponding to the mobile station of the group call initiator, and the ASSIGNMENT REQUEST message carries group call reference information for notifying the BSS of the connection corresponding to the assignment request message Correspondingly is the dedicated connection corresponding to the mobile station of the group call originator. 3. The method according to claim 1 or 2, wherein after the BSS receives the voice group call/broadcast service assignment request message, it modifies the mode of the dedicated channel corresponding to the group call initiator mobile station , change the dedicated channel type to group call channel type. 4. The method according to claim 3, wherein said mode modification further comprises the steps of: The BSS sends the channel mode modification CHANNELMODE MODIFY message to the mobile station of the group call initiator, and the mobile station of the group call initiator returns the channel mode modification confirmation CHANNEL MODE MODIFY ACKNOWLEDGE message to the BSS after completing the mode modification, and transfers to Group call sending mode. 5. A kind of mobile switching center, it is characterized in that, comprises message sending module, is used for in the group call channel mode modification flow process, after receiving the assignment on the dedicated connection corresponding to the group call initiator mobile station to complete the ASSIGNMENT COMPLETE message, Send a voice group call/broadcast service assignment request VGCS/VBSASSIGNMENT REQUEST message corresponding to the cell where the group call initiator mobile station is located to the base station subsystem BSS, and establish a group call resource control connection, so that the BSS receives the VGCS Start the mode modification process after the /VBS ASSIGNMENT REQUEST message, modify the mode of the dedicated channel corresponding to the mobile station of the group call initiator, and modify the dedicated channel type to the group call channel type. 6. The mobile switching center according to claim 5, wherein the message sending module is further configured to send an assignment request ASSIGNMENT REQUEST message on the dedicated connection corresponding to the mobile station of the group call initiator, the assignment The request message carries group call reference information, which is used to notify the BSS that the connection corresponding to the assignment request message corresponds to the dedicated connection corresponding to the mobile station of the group call initiator.