CN108064028B - A method for realizing temporary group call in digital trunking system - Google Patents

Abstract

The present invention provides a method for realizing a temporary group call in a digital trunking system. The method includes: the trunking core network receives group call establishment request information sent by the calling terminal, and the group call establishment request information includes a specific number; the trunking core network judges that it is a temporary group call according to the specific number, and sends a temporary group user list to a location information server Request information, receive the temporary group user list sent by the location information server; the cluster core network creates a temporary group according to the temporary group user list, and assigns a temporary group number to the temporary group; the cluster core network pushes the temporary group information to the members in the group; the cluster core network The network assigns a call identifier, establishes a group context, and sends group call establishment response information to the calling terminal, where the group call establishment response information includes the temporary group user list. The calling process of the present invention does not require the participation of the dispatching station, nor does it write into the database, avoids multiple dynamic reorganization operations in the existing temporary group call realization method, and simplifies the process.

Description

A method for realizing temporary group call in digital trunking system

technical field

The invention relates to the technical field of communications, in particular to a method for implementing a temporary group call in a digital trunking system.

Background technique

The trunking communication system is a dedicated wireless communication system developed to meet the needs of industrial users for command and dispatch. It has a wide range of application markets in public security, transportation, petrochemicals, public utilities, airports and ports. With the continuous development of mobile communication systems towards broadband, at present, B-TrunC (broadband digital trunking communication system based on LTE technology) has become the main technical system of the next-generation trunking system and my country's national standard. In LTE point-to-point communication On the basis of , in order to provide multimedia cluster scheduling function, the network architecture and interface control protocol have been enhanced. With the continuous improvement and evolution of the B-TrunC standard, it has been adopted by users in rail transit, government affairs, public security and other industries, and will be customized and developed based on the B-TrunC architecture for specific industry needs.

Temporary group call is an important service of trunking communication. When a call is initiated, active users in a certain area are formed into a temporary talk group, and the group is maintained until the call ends. For example, the station management area call in the rail transit industry is a typical scene of a temporary group call. It is initiated by the station attendant or the on-board radio. The fixed station on duty at the station to which the call belongs, the calling party does not need to know the called range and exact number when making a call, and the system automatically establishes a temporary talk group according to the current location of the calling party; another example is based on GIS (Geographic Information Server, Geographic In the visual scheduling of Information System), the dispatching station selects a certain area on the map, and initiates a temporary group call for the active users in the area.

In the existing method for implementing a temporary group call in the digital trunking system, the temporary group call requires the participation of the dispatcher, and the dispatcher obtains the member list of the temporary group from the location information server, initiates a dynamic reorganization operation to establish a temporary talk group, and then passes the call when the call ends. The dynamic reorganization operation initiated by the dispatcher deletes this temporary talk group. In the prior art, there is no interface between the trunking core network and the location information server, and the terminal location information required by the trunking core network for call control needs to be converted by the dispatcher, and there is an additional link in the information flow, which increases delay and error probability. Moreover, the temporary group call process involves two dynamic reorganization operations initiated by the dispatcher. When a call is initiated, a group is formed through dynamic reorganization, and when the call ends, the temporary group is deleted through dynamic reorganization. Each dynamic reorganization process requires operations on the database. , the process is more complicated.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method and system for implementing a temporary group call in a digital trunking system, which are used to solve the problems caused by the need for a dispatcher to perform a dynamic reorganization operation in the existing method for implementing a temporary group call and the need to update the database during the dynamic reorganization process. cumbersome process.

An embodiment of the present invention provides a method for implementing a temporary group call in a digital trunking system, including:

The trunking core network receives the group call establishment request information sent by the calling terminal, where the group call establishment request information includes a specific number;

The trunking core network determines that it is a temporary group call according to the specific number, sends a temporary group user list request message to the location information server, and receives the temporary group user list sent by the location information server;

The cluster core network creates a temporary group according to the temporary group user list, and assigns a temporary group number to the temporary group;

The cluster core network pushes temporary group information to members in the group in a point-to-point manner;

The trunking core network assigns a call identifier, establishes a group context, and sends a group call establishment response message to the calling terminal after the bearer on the called side is established, where the group call establishment response message includes the temporary group user list, Indicates the participating members of the current temporary group call to the calling terminal.

The cluster core network establishing the bearer on the called side includes:

The cluster core network sends group context establishment request information to the relevant base station, where the group context establishment request information includes the temporary group number, call priority, cluster bearer configuration information, and non-access stratum message group call establishment indication ; The non-access stratum message group call establishment instruction carries a call identifier, the call type is a group call, and the call attribute includes a temporary group call identifier;

After the base station delivers the cluster paging, the access stratum configuration parameters corresponding to the group call are broadcast through a group call configuration message, and the group call configuration message carries the non-access stratum message group call establishment indication;

The base station sends a group context establishment response to the cluster core network.

Further, the location information server determines the temporary group user list according to the group call area of the temporary group call.

Further, the group call area is designated by the calling terminal or determined by the location information server according to the current location of the calling terminal and the type of the calling terminal;

If the group call area is designated by the calling party, the call establishment request message sent by the calling terminal further includes the group call area.

The method also includes a temporary group call release process:

receiving, by the trunking core network, group call release request information sent by the calling terminal, where the group call release request information includes the call identifier;

sending, by the cluster core network, group call release response information to the calling terminal;

The cluster core network sends a group context release command to the relevant base station, the group context release command carries the release reason and the group call release indication non-access stratum message, and the group call release indication non-access stratum message to which the group belongs is carried out the call identifier. ; the base station broadcasts a group call release message to notify the terminals in the group to release group call-related resources, and the group call release message carries the group call release indication non-access stratum message;

sending, by the base station, a group context release complete message to the cluster core network;

The cluster core network deletes the corresponding group context according to the call identifier.

After the terminal in the group receives the group call release indication non-access stratum message carrying the call identifier, the method further includes:

The terminals in each group release group call resources, and delete the association relationship with the corresponding temporary group in the group to which they belong according to the call identifier, the corresponding relationship between the temporary group call identifier in the call attribute and the temporary group number.

In the implementation method of a temporary group call in a digital trunking system provided by an embodiment of the present invention, the trunking core network receives group call establishment request information sent by the calling terminal, and the group call establishment request information includes a specific number; The specific number is judged to be a temporary group call, and sends the temporary group user list request information to the location information server, and receives the temporary group user list sent by the location information server; the cluster core network creates a temporary group according to the temporary group user list, and creates a temporary group for all The temporary group assigns a temporary group number; the trunking core network pushes the temporary group information to the members in the group in a point-to-point manner; the trunking core network assigns a call identifier, establishes a group context, and sends a message to the calling terminal after the called side bearer is established. Group call establishment response information, the group call establishment response information includes the temporary group user list, and indicates to the calling terminal the calling members of the current temporary group call. In the embodiment of the present invention, the member list of the temporary group is obtained through the interface between the cluster core network and the location information server. The call process does not require the participation of the dispatcher, nor is it written into the database, and the temporary group number is pushed to each group through the group information update process. The terminal avoids multiple dynamic reorganization operations in the existing temporary group call implementation method, and simplifies the process.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic flowchart of a method for implementing a temporary group call in a digital trunking system according to an embodiment of the present invention;

2 is a signaling diagram of a temporary group call establishment according to an embodiment of the present invention;

FIG. 3 is a signaling diagram of temporary group call release according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 1 is a schematic flowchart of a method for implementing a temporary group call in a digital trunking system according to an embodiment of the present invention. As shown in Figure 1, the method of this embodiment includes:

S11: The trunking core network receives group call establishment request information sent by the calling terminal, where the group call establishment request information includes a specific number;

It should be noted that the calling terminal in this embodiment of the present invention uses a specific number to initiate a temporary group call, and the group call area is designated by the calling party or determined by the network side according to the current location information of the calling party. The group call establishment request message sent by the calling terminal to the trunking core network carries a specific number, and optionally carries the group call area and terminal type of the current call. In practical applications, if the group call area is specified by the caller (for example: frame selection through GIS map), the message also carries the group call area. There is no need to carry the group call area. At the same time, the portable terminal type can be selected to assist in judging the members of the temporary group (for example, when the station management area calls, when the caller is a vehicle-mounted station and a wireless fixed station, the members of the temporary group are different).

The present invention is not only applicable to the terminal, but also to the group call initiated by the dispatcher. If it is a group call initiated by a terminal, the group call establishment request uses the NAS interface Call Request message; if it is a group call initiated by the dispatcher, the group call establishment request uses the D interface SIP (INVITE) message.

S12: The trunking core network determines that it is a temporary group call according to the specific number, sends a temporary group user list request message to a location information server, and receives a temporary group user list sent by the location information server;

It should be noted that, for users in the rail transit industry, the location information server may be a Dispatching Information Server (DIS), and the DIS maintains the on-board radio and location information in real time according to the Automatic Train Supervision (ATS) information; And industrial users such as urban management, the location information server can be GIS.

S13: The cluster core network creates a temporary group according to the temporary group user list, and assigns a temporary group number to the temporary group;

It should be noted that step S13 does not require the participation of the scheduling console, and the created temporary group information is not written into the database eHSS.

S14: The cluster core network pushes the temporary group information to members in the group in a point-to-point manner;

It should be noted that, in this embodiment of the present invention, the temporary group information is pushed to members in the group in a point-to-point manner, and the temporary group information is updated. This process is a standard B-TrunC NAS interface process (group information update process).

S15: The trunking core network allocates a call identifier, establishes a group context, and sends a group call establishment response message to the calling terminal after the bearer on the called side is established, where the group call establishment response message includes the temporary group user List, indicating to the calling party the participating members of the current temporary group call.

In the embodiment of the present invention, the member list of the temporary group is obtained through the interface between the cluster core network and the location information server. The call process does not require the participation of the dispatcher, nor is it written into the database, and the temporary group number is pushed to each group through the group information update process. terminal, which simplifies the process.

FIG. 2 is a signaling diagram of a temporary group call establishment according to an embodiment of the present invention. As shown in FIG. 2 , in an optional implementation manner of the embodiment of the present invention, similar to the method in FIG. 1 , step S15 specifically includes:

The cluster core network sends group context establishment request information to the relevant base station, where the group context establishment request information includes the temporary group number, call priority, cluster bearer configuration information, and non-access stratum message group call establishment indication ; the non-access stratum message group call establishment indication carries a call identifier. The call type is group call, and the call attribute includes the temporary group call identifier;

It should be noted that the non-access stratum NAS message group call establishment instruction carries information such as the call identifier, call type, call attribute, and media attribute of the call. In this embodiment of the present invention, the call type is still a group call, and a temporary group call identifier is extended in the call attribute to indicate that the current group call is a one-time temporary group call. In the embodiment of the present invention, the ordinary group call is used to realize the temporary group call, the call type is not added, only an identification bit is extended to the call attribute, and the NAS protocol used for the cluster service control by the B-TrunC is changed little.

After the base station delivers the cluster paging, the access stratum configuration parameters corresponding to the group call are broadcast through a group call configuration message, and the group call configuration message carries the non-access stratum message group call establishment indication;

It should be noted that the base station eNB delivers the cluster paging, carrying information such as the group ID, group RNTI, and call priority of the temporary group, and broadcasts the access layer configuration parameters corresponding to the group call through the group call configuration message of the air interface, carrying NAS message group call establishment indication;

The base station sends a group context establishment response to the cluster core network.

Further, after sending the group call establishment response information to the calling terminal, the method further includes:

The trunking core network receives the group call establishment completion information sent by the calling terminal.

In practical applications, during the temporary group call process, the members in the group remain unchanged. If a vehicle station moves out of the group call area, the existing group call expansion mechanism ensures the continuity of the service.

FIG. 3 is a signaling diagram of temporary group call release according to an embodiment of the present invention. As shown in FIG. 3, the method of the embodiment of the present invention further includes:

receiving, by the trunking core network, group call release request information sent by the calling terminal, where the group call release request information includes the call identifier;

It should be noted that the calling terminal decides to release the current temporary group call, and sends a group call release request to the trunking core network, and the message carries the call identifier, indicating that the group call is released.

sending, by the cluster core network, group call release response information to the calling terminal;

The cluster core network sends a group context release command to the relevant base station, where the group context release command carries a release reason and a group call release indication non-access stratum message, and the group call release indication non-access stratum message to which the group belongs is carried identifier; the base station broadcasts a group call release message to notify the terminals in the group to release group call-related resources, and the group call release message carries the group call release indication non-access stratum message;

sending, by the base station, a group context release complete message to the cluster core network;

The cluster core network deletes the corresponding group context according to the call identifier.

Further, after the terminal receives the group call release indication non-access stratum message carrying the call identifier, the method further includes:

The terminals in each group release group call resources, and delete the association relationship with the corresponding temporary group in the group to which they belong according to the call identifier, the corresponding relationship between the temporary group call identifier in the call attribute and the temporary group number.

In the implementation method of a temporary group call in a digital trunking system provided by an embodiment of the present invention, the trunking core network receives group call establishment request information sent by the calling terminal, and the group call establishment request information includes a specific number; The specific number sends the temporary group user list request information to the location information server, and receives the temporary group user list sent by the location information server; the cluster core network creates a temporary group according to the temporary group user list, and assigns a temporary group to the temporary group. The cluster core network pushes the temporary group information to the members in the group in a point-to-point manner; the cluster core network establishes the group context, and sends the group call establishment response information to the calling terminal after establishing the bearer on the called side, and the group call The establishment response information includes the temporary group user list. In the embodiment of the present invention, the member list of the temporary group is obtained through the interface between the cluster core network and the location information server. The call process does not require the participation of the dispatcher, nor is it written into the database, and the temporary group number is pushed to each group through the group information update process. The terminal avoids multiple dynamic reorganization operations in the existing temporary group call implementation method, and simplifies the process.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

It should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also includes no explicit Other elements listed, or those inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

In the description of the present invention, numerous specific details are set forth. It will be understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it is to be understood that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment in order to simplify the present disclosure and to aid in the understanding of one or more of the various aspects of the invention. , figures, or descriptions thereof. However, this method of disclosure should not be construed to reflect the intention that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present invention.

Claims (6)

1. a realization method of temporary group call in a digital trunking system, is characterized in that, comprises: The trunking core network receives the group call establishment request information sent by the calling terminal, where the group call establishment request information includes a specific number; The trunking core network determines that it is a temporary group call according to the specific number, sends a temporary group user list request message to the location information server, and receives the temporary group user list sent by the location information server; The cluster core network creates a temporary group according to the temporary group user list, and assigns a temporary group number to the temporary group; The cluster core network pushes temporary group information to members in the group in a point-to-point manner; The trunking core network assigns a call identifier, establishes a group context, and sends a group call establishment response message to the calling terminal after the bearer on the called side is established, where the group call establishment response message includes the temporary group user list, Indicates the participating members of the current temporary group call to the calling terminal. 2. The method for realizing temporary group call in the digital trunking system according to claim 1, wherein the trunking core network establishes the called side bearer comprising: The cluster core network sends group context establishment request information to the relevant base station, where the group context establishment request information includes the temporary group number, call priority, cluster bearer configuration information, and non-access stratum message group call establishment indication ; The non-access stratum message group call establishment instruction carries a call identifier, the call type is a group call, and the call attribute includes a temporary group call identifier; After the base station delivers the cluster paging, the access stratum configuration parameters corresponding to the group call are broadcast through a group call configuration message, and the group call configuration message carries the non-access stratum message group call establishment indication; The base station sends a group context establishment response to the cluster core network. 3 . The method for implementing a temporary group call in a digital trunking system according to claim 1 , wherein the location information server determines a temporary group user list according to the group call area of the temporary group call. 4 . 4. the realization method of temporary group call in the digital trunking system according to claim 3, is characterized in that, group call area is designated by calling terminal or location information server is determined according to the current position of calling terminal and calling terminal type; If the group call area is designated by the calling party, the group call establishment request information sent by the calling terminal also includes the group call area. 5. The realization method of temporary group call in digital trunking system according to claim 1, is characterized in that, described method also comprises temporary group call release process: receiving, by the trunking core network, group call release request information sent by the calling terminal, where the group call release request information includes the call identifier; sending, by the cluster core network, group call release response information to the calling terminal; The cluster core network sends a group context release command to the relevant base station, the group context release command carries the release reason and the group call release indication non-access stratum message, and the group call release indication non-access stratum message carries the call identifier; the base station broadcasts a group call release message to notify the terminals in the group to release group call-related resources, and the group call release message carries the group call release indication non-access stratum message; sending, by the base station, a group context release complete message to the cluster core network; The cluster core network deletes the corresponding group context according to the call identifier. 6. The method for implementing a temporary group call in a digital trunking system according to claim 5, wherein after the terminal in the group receives the group call release indication non-access stratum message carrying the call identifier, the The method also includes: Each terminal in the group releases the group call resources, and deletes the association relationship with the corresponding temporary group in the group to which it belongs according to the call identifier, the corresponding relationship between the temporary group call identifier and the temporary group number in the call attribute.

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