CN108064028B - Method for realizing temporary group calling in digital cluster system - Google Patents
Method for realizing temporary group calling in digital cluster system Download PDFInfo
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- CN108064028B CN108064028B CN201610979037.2A CN201610979037A CN108064028B CN 108064028 B CN108064028 B CN 108064028B CN 201610979037 A CN201610979037 A CN 201610979037A CN 108064028 B CN108064028 B CN 108064028B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/005—Transmission of information for alerting of incoming communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
Abstract
The invention provides a method for realizing temporary group calling in a digital cluster system. The method comprises the following steps: the cluster core network receives group call establishment request information sent by a calling terminal, wherein the group call establishment request information comprises a specific number; the cluster core network judges the group calling as a temporary group calling according to the specific number, sends a temporary group user list request message to the position information server, and receives a temporary group user list sent by the position information server; the cluster core network creates a temporary group according to the temporary group user list and allocates 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 distributes a calling identifier, establishes a group context, and sends group calling establishment response information to the calling terminal, wherein the group calling establishment response information comprises the temporary group user list. The calling process of the invention does not need the participation of a dispatching desk and is not written into a database, thereby avoiding multiple dynamic recombination operations in the existing temporary group calling realization method and simplifying the flow.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method for realizing temporary group calling in a digital trunking system.
Background
The trunking communication system is a special wireless communication system developed for meeting the demand of commanding and dispatching of industrial users, and has wide application markets in public safety, transportation, petrochemical industry, public utilities and airport ports. With the development of mobile communication systems towards broadband, currently, B-TrunC (broadband digital trunking communication system based on LTE technology) has become the main technical system of the next generation trunking system and national standard in China, and on the basis of LTE point-to-point communication, network architecture, interface control protocol, etc. are enhanced to provide multimedia trunking scheduling function. With the continuous improvement and evolution of the B-Trunc standard, the B-Trunc standard is adopted by industrial users such as rail transit, government affairs and public security, and is customized and developed for specific industrial requirements on the basis of the B-Trunc architecture.
The temporary group call is an important service of trunking communication, and when a call is initiated, active users in a certain area form a temporary talk group, and the group range is maintained until the call is ended. If the station district call in the rail transit industry is a typical scene of the temporary group call, the station attendant or the vehicle-mounted station initiates the call, the station attendant fixed station is used for calling all train vehicle-mounted stations in the jurisdiction range of the station, and the vehicle-mounted stations call the attendant fixed station of the station to which the vehicle-mounted stations belong currently, when the call is initiated, a calling party does not need to know the range and the exact number of a called party, and a temporary call group is automatically established by the system according to the current position of the calling party; for example, in the visual scheduling based on the GIS (Geographic Information server), the scheduling station selects a certain area on the map, and initiates a temporary group call for active users in the area.
In the existing method for realizing temporary group calling in a digital trunking system, the temporary group calling needs a dispatching desk to participate, the dispatching desk acquires a member list of the temporary group from a position information server, initiates dynamic restructuring operation to establish a temporary talk group, and deletes the temporary talk group through the dynamic restructuring operation initiated by the dispatching desk when the calling is finished. In the prior art, a cluster core network and a position information server have no interfaces, terminal position information and the like required by the cluster core network for call control need to be converted by a dispatching desk, information flow has one more link, and delay and error probability are increased. In addition, the temporary group calling process involves two dynamic restructuring operations initiated by the dispatching desk, a group is formed by dynamic restructuring when a call is initiated, the temporary group is deleted by dynamic restructuring when the call is ended, and the database needs to be operated in each dynamic restructuring process, so that the process is complicated.
Disclosure of Invention
The embodiment of the invention provides a method and a system for realizing temporary group calling in a digital cluster system, which are used for solving the problems that a dispatching station is required to carry out dynamic restructuring operation in the conventional method for realizing temporary group calling, and a database is required to be updated in the dynamic restructuring process, so that the process is complicated.
The embodiment of the invention provides a method for realizing temporary group calling in a digital cluster system, which comprises the following steps:
the method comprises the steps that a cluster core network receives group call establishment request information sent by a calling terminal, wherein the group call establishment request information comprises a specific number;
the cluster core network judges the special number as a temporary group call, sends a temporary group user list request message to a position information server, and receives a temporary group user list sent by the position information server;
the cluster core network creates a temporary group according to the temporary group user list and allocates a temporary group number to the temporary group;
the cluster core network pushes temporary group information to members in a group in a point-to-point mode;
the cluster core network distributes a call identifier, establishes a group context, and sends group call establishment response information to the calling terminal after establishing the called side bearer, wherein the group call establishment response information comprises the temporary group user list and indicates the participating members of the current temporary group call to the calling terminal.
The cluster core network establishing called side bearer comprises:
the cluster core network sends group context establishment request information to a relevant base station, wherein the group context establishment request information comprises the temporary group number, the call priority, the cluster bearing configuration information and a non-access stratum message group call establishment instruction; the non-access stratum message group call establishment indication carries a call identifier, the call type is a group call, and the call attribute comprises a temporary group call identifier;
after the base station issues the cluster paging, the access layer configuration parameters of the corresponding group calling are broadcasted through the group calling configuration message, and the group calling configuration message carries the non-access layer message group calling establishment instruction;
and the base station sends a group context establishment response to the cluster core network.
Further, the location information server determines a temporary group user list according to the group calling area of the temporary group calling.
Furthermore, the group calling area is appointed by the calling terminal or determined by the position information server according to the current position of the calling terminal and the type of the calling terminal;
if the group calling area is designated by the calling party, the call establishment request message sent by the calling terminal also includes the group calling area.
The method also includes a temporary group call release process:
the cluster core network receives group call release request information sent by the calling terminal, wherein the group call release request information comprises the call identifier;
the cluster core network sends group call release response information to the calling terminal;
the cluster core network sends a group context release command to a relevant base station, wherein the group context release command carries a release reason and a group call release indication non-access layer message, and the belonging group call release indication non-access layer message carries a call identifier; the base station broadcasts a group call release message to inform the terminals in the group to release the related resources of the group call, wherein the group call release message carries a non-access layer message of the group call release indication;
the base station sends a group context release completion message to the cluster core network;
and the cluster core network deletes the corresponding group context according to the call identifier.
After the group call release indication non-access stratum message carrying the call identifier is received by the terminal in the group, the method further comprises the following steps:
and the terminals in each group release the group calling resources, and delete the association relation with the corresponding temporary group in the group to which the terminals belong according to the corresponding relation between the temporary group calling identifier in the calling identifier and the temporary group number in the calling attribute.
In the method for implementing temporary group call in the digital trunking system provided by the embodiment of the invention, a trunking core network receives group call establishment request information sent by a calling terminal, wherein the group call establishment request information comprises a specific number; the cluster core network judges the special number as a temporary group call, sends a temporary group user list request message to a position information server, and receives a temporary group user list sent by the position information server; the cluster core network creates a temporary group according to the temporary group user list and allocates a temporary group number to the temporary group; the cluster core network pushes the temporary group information to the members in the group in a point-to-point mode; the cluster core network distributes a call identifier, establishes a group context, and sends group call establishment response information to the calling terminal after establishing the called side bearer, wherein the group call establishment response information comprises the temporary group user list and indicates the call members of the current temporary group call to the calling terminal. The embodiment of the invention obtains the member list of the temporary group through the interface between the cluster core network and the position information server, does not need a dispatching desk to participate in the calling process, does not need to write in a database, and pushes the temporary group number to each group terminal through the group information updating process, thereby avoiding multiple dynamic recombination operations in the conventional temporary group calling implementation method and simplifying the flow.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
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;
fig. 2 is a signaling diagram of temporary group call setup according to an embodiment of the present invention;
fig. 3 is a signaling diagram of a temporary group call release according to an embodiment of the present invention.
Detailed Description
In order to make the objects, 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart 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 fig. 1, the method of this embodiment includes:
s11: the method comprises the steps that a cluster core network receives group call establishment request information sent by a calling terminal, wherein the group call establishment request information comprises a specific number;
it should be noted that, the calling terminal in the embodiment of the present invention initiates a temporary group call by using a specific number, and a group call area is specified by a calling party or determined by a network side according to current location information of the calling party. The group call establishment request message sent by the calling terminal to the cluster core network carries a specific number, and optionally carries the group call area and the terminal type of the call. In practical application, if the group calling area is specified by the caller (e.g. by GIS map selection), the message also carries the group calling area, and if the group calling area is determined by the current position of the caller (e.g. station area calling), the group calling area does not need to be carried. Meanwhile, the type of the portable terminal can be selected for assisting in judging the members of the temporary group (for example, when the calling party is a vehicle-mounted station and a wireless fixed station, the members of the temporary group are different when the calling party is a station area call).
The invention is not only suitable for the terminal, but also suitable for the group calling initiated by the dispatching desk. If the group calling is initiated by the terminal, the group calling establishment Request uses the Call Request message of the NAS interface; if the group calling is initiated by the dispatching desk, the group calling establishment request uses a D interface SIP (INVITE) message.
S12: the cluster core network judges the special number as a temporary group call, sends a temporary group user list request message to a position information server, and receives a temporary group user list sent by the position information server;
it should be noted that, for a user in the rail transit industry, the location Information Server may be a scheduling Information Server (DIS), and the DIS maintains the train-mounted station and the location Information in real time according to Automatic train monitoring (ATS) Information; for users in the industries such as government affairs network and city management, the position information server can be a GIS.
S13: the cluster core network creates a temporary group according to the temporary group user list and allocates a temporary group number to the temporary group;
it should be noted that, in step S13, the dispatcher station does not need to participate, and the created temporary group information is not written to the database eHSS.
S14: the cluster core network pushes temporary group information to members in a group in a point-to-point mode;
it should be noted that, in the embodiment of the present invention, the temporary group information is pushed to the group members in a point-to-point manner, and the temporary group information is updated, where the process is a standard B-TrunC NAS interface flow (group information update flow).
S15: the cluster core network distributes a call identifier, establishes a group context, and sends group call establishment response information to the calling terminal after establishing the called side bearer, wherein the group call establishment response information comprises the temporary group user list and indicates the participating members of the current temporary group call to the calling terminal.
The embodiment of the invention obtains the member list of the temporary group through the interface between the cluster core network and the position information server, does not need a dispatching desk to participate in the calling process, does not need to write in a database, and pushes the temporary group number to each in-group terminal through the group information updating process, thereby simplifying the flow.
Fig. 2 is a signaling diagram of temporary group call setup according to an embodiment of the present invention. As shown in fig. 2, in an alternative 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 a relevant base station, wherein the group context establishment request information comprises the temporary group number, the call priority, the cluster bearing configuration information and a non-access stratum message group call establishment instruction; the non-access stratum message group calling establishment indication carries a calling identifier. The call type is a group call, and the call attribute comprises a temporary group call identifier;
it should be noted that the non-access stratum NAS message group call establishment instruction carries information such as a call identifier, a call type, a call attribute, and a media attribute of the call. In the embodiment of the invention, the call type is still the group call, and the calling attribute is expanded with an identification bit of a temporary group call to indicate that the group call is a disposable temporary group call. In the embodiment of the invention, the temporary group calling is realized by adopting the common group calling, the calling type is not increased, only one identification bit is expanded to the calling attribute, and the change of an NAS protocol used for controlling the cluster service by the B-trunk C is small.
After the base station issues the cluster paging, the access layer configuration parameters of the corresponding group calling are broadcasted through the group calling configuration message, and the group calling configuration message carries the non-access layer message group calling establishment instruction;
it should be noted that, the base station eNB issues a trunking paging, carries information such as group ID, group RNTI, and call priority of the temporary group, broadcasts an access layer configuration parameter of a corresponding group call through a group call configuration message of an air interface, and carries an NAS message group call establishment instruction;
and the base station sends a group context establishment response to the cluster core network.
Further, after sending the group call setup response information to the calling terminal, the method further includes:
and the cluster core network receives the group call establishment completion information sent by the calling terminal.
In practical application, during the temporary group calling process, the members in the group are kept unchanged, and if a vehicle-mounted station moves out of the group calling area, the continuity of the service is ensured by the existing group calling extension mechanism.
Fig. 3 is a signaling diagram of a temporary group call release according to an embodiment of the present invention. The method of the embodiment of the present invention as shown in fig. 3 further includes:
the cluster core network receives group call release request information sent by the calling terminal, wherein the group call release request information comprises the call identifier;
it should be noted that the calling terminal determines to release the current temporary group call, and sends a group call release request to the trunking core network, where the message carries a call identifier and indicates to release the group call.
The cluster core network sends group call release response information to the calling terminal;
the cluster core network sends a group context release command to a relevant base station, wherein the group context release command carries a release reason and a group call release indication non-access layer message, and the belonging group call release indication non-access layer message carries a call identifier; the base station broadcasts a group call release message to inform the terminals in the group to release the related resources of the group call, wherein the group call release message carries a non-access layer message of the group call release indication;
the base station sends a group context release completion message to the cluster core network;
and 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:
and the terminals in each group release the group calling resources, and delete the association relation with the corresponding temporary group in the group to which the terminals belong according to the corresponding relation between the temporary group calling identifier in the calling identifier and the temporary group number in the calling attribute.
In the method for implementing temporary group call in the digital trunking system provided by the embodiment of the invention, a trunking core network receives group call establishment request information sent by a calling terminal, wherein the group call establishment request information comprises a specific number; the cluster core network sends a temporary group user list request message to a position information server according to the specific number and receives a temporary group user list sent by the position information server; the cluster core network creates a temporary group according to the temporary group user list and allocates a temporary group number to the temporary group; the cluster core network pushes the temporary group information to the members in the group in a point-to-point mode; the cluster core network establishes a group context, and sends group call establishment response information to the calling terminal after the called side bearer is established, wherein the group call establishment response information comprises the temporary group user list. The embodiment of the invention obtains the member list of the temporary group through the interface between the cluster core network and the position information server, does not need a dispatching desk to participate in the calling process, does not need to write in a database, and pushes the temporary group number to each group terminal through the group information updating process, thereby avoiding multiple dynamic recombination operations in the conventional temporary group calling implementation method and simplifying the flow.
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, and the like) 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 of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, numerous specific details are set forth. It is 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 should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: 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 examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for realizing temporary group calling in a digital cluster system is characterized by comprising the following steps:
the method comprises the steps that a cluster core network receives group call establishment request information sent by a calling terminal, wherein the group call establishment request information comprises a specific number;
the cluster core network judges the special number as a temporary group call, sends a temporary group user list request message to a position information server, and receives a temporary group user list sent by the position information server;
the cluster core network creates a temporary group according to the temporary group user list and allocates a temporary group number to the temporary group;
the cluster core network pushes temporary group information to members in a group in a point-to-point mode;
the cluster core network distributes a call identifier, establishes a group context, and sends group call establishment response information to the calling terminal after establishing the called side bearer, wherein the group call establishment response information comprises the temporary group user list and indicates the participating members of the current temporary group call to the calling terminal.
2. The method of claim 1, wherein the establishing of the called side bearer by the trunking core network comprises:
the cluster core network sends group context establishment request information to a relevant base station, wherein the group context establishment request information comprises the temporary group number, the call priority, the cluster bearing configuration information and a non-access stratum message group call establishment instruction; the non-access stratum message group call establishment indication carries a call identifier, the call type is a group call, and the call attribute comprises a temporary group call identifier;
after the base station issues the cluster paging, the access layer configuration parameters of the corresponding group calling are broadcasted through the group calling configuration message, and the group calling configuration message carries the non-access layer message group calling establishment instruction;
and the base station sends a group context establishment response to the cluster core network.
3. The method of claim 1, wherein the location information server determines the temporary group user list according to a group call area of the temporary group call.
4. The method of claim 3, wherein the group call area is designated by the calling terminal or the location information server is determined according to the current location of the calling terminal and the type of the calling terminal;
if the group calling area is designated by the calling party, the group calling establishment request information sent by the calling terminal also comprises the group calling area.
5. The method according to claim 1, wherein the method further comprises a temporary group call release procedure:
the cluster core network receives group call release request information sent by the calling terminal, wherein the group call release request information comprises the call identifier;
the cluster core network sends group call release response information to the calling terminal;
the cluster core network sends a group context release command to a relevant base station, wherein the group context release command carries a release reason and a group call release indication non-access layer message, and the group call release indication non-access layer message carries a call identifier; the base station broadcasts a group call release message to inform the terminals in the group to release the related resources of the group call, wherein the group call release message carries a non-access layer message of the group call release indication;
the base station sends a group context release completion message to the cluster core network;
and the cluster core network deletes the corresponding group context according to the call identifier.
6. The method according to claim 5, wherein after the group call release indication non-access stratum message carrying the call identifier is received by the terminals in the group, the method further comprises:
and the terminals in each group release the group calling resources, and delete the association relation with the corresponding temporary group in the group to which the terminals belong according to the corresponding relation between the temporary group calling identifier and the temporary group number in the calling identifier and the calling attribute.
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| CN112203239B (en) * | 2020-10-29 | 2022-03-15 | 北京长焜科技有限公司 | Pre-established bearing management method in B-Trunc system |
| CN115474161A (en) * | 2021-06-11 | 2022-12-13 | 普天信息技术有限公司 | Cluster paging method, device, cluster terminal, network equipment and storage medium |
| CN114173290B (en) * | 2021-11-04 | 2023-04-25 | 北京长焜科技有限公司 | Method for containing call in B-trunk system |
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