CN114040342A

CN114040342A - Method for establishing group calling, cluster core network equipment and storage medium

Info

Publication number: CN114040342A
Application number: CN202111423947.XA
Authority: CN
Inventors: 辛静
Original assignee: New H3C Technologies Co Ltd Chengdu Branch
Current assignee: New H3C Technologies Co Ltd Chengdu Branch
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-02-11
Anticipated expiration: 2041-11-26
Also published as: CN114040342B

Abstract

This specification provides a method, cluster core network equipment and storage medium for establishing group calling, the method includes: receiving a group call establishment request initiated by a calling user, establishing an uplink transmission channel with the calling user and a downlink transmission channel with a called user according to the establishment request, and sending a group call establishment success notification to the calling user after the uplink transmission channel is established. By the method, the efficiency of group call establishment can be improved.

Description

Method for establishing group calling, cluster core network equipment and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method for establishing a group call, a cluster core network device, and a storage medium.

Background

The global private wireless network technology includes a narrowband clustering technology and a broadband clustering technology. The mainstream standards for narrowband digital clustering include the TETRA and DMR standards of the European Telecommunications Standards Institute (ETSI), the P25 standard of the american Telecommunications Industry Association (TIA), and the PDT standard of the national public security industry, which can provide voice cluster scheduling, low-speed data and short message services. The broadband cluster is a private network wireless technology which integrates multimedia cluster scheduling application services such as supporting broadband data transmission, voice, data, video and the like.

With the rapid development of the industries such as global public safety, government affairs, transportation, energy and the like, the industry users have urgent needs for broadband data access, multimedia cluster scheduling and safer and more reliable network services. The broadband trunking (B-TrunC) technology has become a choice for the broadband technology of the private wireless network due to its large bandwidth, low delay, high reliability and large capacity, and is widely applied to actual services in various industries. The broadband wireless private network system can provide broadband multimedia scheduling services for industrial users, such as voice single call, voice group call, video single call, video group call, short data, emergency call, forced insertion and forced removal, dynamic recombination, stunning and resurrection and the like.

Disclosure of Invention

The embodiment of the disclosure provides a method for establishing a group call, cluster core network equipment and a storage medium.

The embodiment of the disclosure provides a method for establishing group calling, which is applied to a cluster core network, and the method comprises the following steps:

receiving a group call establishment request initiated by a calling user;

establishing an uplink transmission channel with the calling user and establishing a downlink transmission channel with the called user according to the establishment request;

and after the uplink transmission channel is established, sending a group call establishment success notification to the calling user.

Wherein the method further comprises:

after a group call establishment success notification is sent to a calling subscriber, first uplink service data sent by the calling subscriber is cached.

Before buffering the first uplink service data sent by the calling subscriber, the method further includes:

receiving first uplink service data;

and judging whether the forwarding table entry of the first uplink service data is complete, and if the forwarding table entry of the first uplink service data is incomplete, caching the first uplink service data sent by the calling user.

After determining that the establishment of the downlink transmission channel with the called user is completed, the method further comprises the following steps:

judging whether first uplink service data exist in a cache region corresponding to the user;

and if so, sending the first uplink service data to a called user through the downlink transmission channel.

After receiving second uplink service data sent by a calling subscriber, checking whether cached first uplink service data exists in a cache region corresponding to the calling subscriber, and if so, sending the cached first uplink service data through a downlink transmission channel and then sending the second uplink service data.

It can be seen from the above embodiments that, when a group call is established, after an uplink tunnel is established, a calling user is notified to complete the establishment of the group call, which can effectively shorten the time for establishing the group call and improve the efficiency of establishing the group call.

The embodiment of the present disclosure further provides a cluster core network device, where the cluster core network device includes:

a receiving unit, configured to receive a group call establishment request initiated by a calling user;

the processing unit is used for establishing an uplink transmission channel with the calling user and establishing a downlink transmission channel with the called user according to the establishment request;

and the sending unit is used for sending a group call establishment success notification to the calling user after the uplink transmission channel is established.

Optionally, the cluster core network device further includes: a buffer unit for buffering the data of the data to be transmitted,

the buffer unit is used for buffering the first uplink service data sent by the calling user.

Optionally, the sending unit is further configured to send the first uplink service data to the called user through the downlink transmission channel.

The embodiment of the present disclosure further provides a cluster core network device, where the cluster core network device includes: a memory, a processor and a program stored on the memory and executable on the processor, which when executed by the processor implements the method steps in the embodiments described above.

The embodiments of the present disclosure also provide a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the method steps in the above embodiments are implemented.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a schematic diagram of a wideband trunking system architecture based on TD-LTE according to an embodiment of the present disclosure.

Fig. 2 is a logic schematic diagram of a broadband trunking service architecture provided in the embodiment of the present disclosure.

Fig. 3 is a flowchart illustrating a method for establishing a group call according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the specification, as detailed in the appended claims.

The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present specification. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

As shown in fig. 1, in the system architecture, a private network broadband trunking system based on the TD-LTE technology is composed of a TD-LTE broadband trunking terminal, a TD-LTE data terminal, a TD-LTE broadband trunking base station, a TD-LTE broadband trunking core network, and a dispatching desk.

Wherein, the LTE data terminal supports the packet data transmission service based on IP. The LTE data terminal can be connected to the LTE broadband cluster base station through a Uu interface to realize the basic data service of the LTE packet domain.

Besides supporting the packet data transmission service based on the IP, the LTE broadband trunking terminal should also support broadband trunking service and functions. The LTE broadband cluster terminal can be connected to an LTE broadband cluster base station through a Uu-T interface to realize LTE packet domain basic service and cluster service.

The LTE broadband trunking base station supports trunking related functions besides LTE basic functions. The LTE broadband cluster base station can support the access of an LTE data terminal and an LTE broadband cluster terminal through a Uu-T interface.

The LTE broadband trunking core network is a network providing broadband trunking services, and includes five logical entities, namely, an eMME, an xGW, an eHSS, a TCF, and a TMF, which may be combined to form actual network element devices according to actual deployment, as shown in fig. 2.

The eMME is a mobility management entity and is responsible for mobility and bearer management.

The eHSS is a subscription data management center and an authentication center. The eHSS basic LTE function comprises: managing user data; managing user position information; managing user safety information; mobility management; support access restriction functions; processing a Notify request sent by the MME; IP address allocation; a location registration function.

xGW support cluster service bearer management, cluster data routing and forwarding.

The TCF is responsible for scheduling and managing the cluster service, and the main functions comprise: multimedia cluster service scheduling including voice, video and data is supported; authentication and authorization, registration and cancellation of the cluster service; establishing and releasing a cluster call; managing the speaking right; and subscribing and updating cluster group information.

The TMF is responsible for data transmission of the trunking service, and the main functions include: managing a cluster user plane; routing and forwarding cluster service data; copying and distributing cluster service data; and (5) performing media coding and decoding conversion on the cluster service.

The dispatching desk is a special terminal in the cluster system and provides dispatching function and management function of cluster service for a dispatcher or an operator with special authority.

In this embodiment, a group call refers to half-duplex communication between a calling party and a plurality of called parties (i.e., one-to-many). In the group calling process, only one member of a group (a plurality of users form a group) can talk at the same time, and other members can only answer the call. Group calls can be divided into voice group calls and video group calls. Group calling is the most important service in the cluster system.

Generally, the process of group call setup is as follows:

a: the calling UE initiates a group calling establishment request, and the cluster core network establishes a special bearer for the UE for the initiator to use in uplink transmission.

b: the cluster core network initiates the establishment of the group downlink bearer to the relevant base station.

c: after the downlink bearer of at least one base station is successfully established, the cluster core network informs the initiator through CALL ACCEPT that the corresponding resources are prepared and the group call is successfully established

d: the user informs the cluster core network through CALL COMPLETE that CALL ACCEPT is obtained by the user, and confirms that the current group CALL is successfully established.

Through the above process, it can be seen that in the group call establishment process, after the downlink tunnel needs to be established, the notification of group call establishment is fed back to the initiator, which results in a long group call establishment process.

Meanwhile, if the group calling is failed to establish, the rollback flow is longer; for example, in a group CALL setup procedure initiated by a user, if a calling user does not reply to a core network CALL COMPLETE message, the group CALL setup fails, and the trunking core network needs to release bearers established with each base station and also needs to release SIP sessions established with each DC (Dispatcher).

To solve the technical problem presented above, an embodiment of the present disclosure provides a method for establishing a group call, as shown in fig. 3, where the method is applied to a cluster core network, and the method includes:

s301, receiving a group call establishment request initiated by a calling user;

s302, establishing an uplink transmission channel with the calling user and establishing a downlink transmission channel with the called user according to the establishment request;

s303 sends a group call establishment success notification to the calling user after the uplink transmission channel is established.

In this embodiment, each user (user terminal) communicates with the trunking core network through the associated base station, and each user includes a device that has an access network capability and supports broadband trunking services and functions, for example: cell-phone, intercom, dispatch table, TV, computer, game machine, TV box, intelligent audio amplifier etc..

In this embodiment, when a calling user needs to perform a group call service, a group call setup request is sent to a trunking core network (the group call setup request is sent to the trunking core network through a base station associated with the calling user), where the group call setup request carries information of a called user that needs to be accessed.

In step S302, the trunking core network establishes an uplink transmission channel with the calling party according to the group call establishment request sent by the calling party, and simultaneously establishes a downlink transmission channel with the called party according to the information of the called party in the group call establishment request.

In this embodiment, after the trunking core network completes the uplink transmission channel with the calling subscriber, the calling subscriber may be notified that the group call service is completed without waiting for the establishment of the downlink transmission channel.

Because the control plane flow is changed, when the group call flow of the calling user is completed (after the group call is successfully established), and the trunking core network initiates the group call flow of the called user to other users (UE or DC) in the group, the calling user has the speech right, and there may be a situation that the calling user starts speaking without completing the establishment of any downlink transmission channel, that is, the trunking core network user plane (TMF) may receive the uplink data of the group call but may have an incomplete forwarding table, and cannot forward the data.

In order to solve the above technical problem, in this embodiment, after sending a notification of successful group call setup to a calling subscriber, a trunking core network caches first uplink service data sent by the calling subscriber.

In an example, after the trunking core network receives the first uplink service data of the calling party, it checks whether the group call forwarding table corresponding to the first uplink service data is complete, if so, it indicates that the downlink transmission channel from the calling party to the called party is already established, and then it can directly forward according to the group call forwarding table.

If the group call forwarding table corresponding to the first uplink service data is checked to be incomplete, it indicates that a downlink transmission channel from the calling user to the called user is not established, and the first uplink service data is cached.

When the subsequent cluster core network determines that a downlink transmission channel reaching a called user is established, whether corresponding first uplink service data exists in the cache region is checked, and if the corresponding first uplink service data exists, the first uplink service data is firstly sent from the downlink transmission channel.

In this embodiment, if the cluster core network receives the second uplink service data, it is also checked whether the corresponding first uplink service data exists in the buffer area, and if so, the first uplink service data is sent from the downlink transmission channel, and then the second uplink service data is sent.

It can be seen from the above embodiments that, by using the scheme of the present disclosure, the calling user can be notified that the group call is successfully established after the uplink transmission channel is established, and the efficiency of group call establishment can be effectively improved. Meanwhile, the uplink service data can be cached, and the condition that the uplink service data is lost due to the fact that a downlink transmission channel is not established is prevented.

Based on the foregoing method embodiments, this disclosure further provides a cluster core network device, where the cluster core network device includes:

Wherein, the cluster core network device further includes: a buffer unit for buffering the data of the data to be transmitted,

The sending unit is further configured to send the first uplink service data to a called user through the downlink transmission channel.

The embodiment of the present disclosure further provides a cluster core network device, where the cluster core network device includes: a memory, a processor and a program stored on the memory and executable on the processor, which when executed by the processor implements the above-described method embodiments.

The embodiment of the disclosure also provides a computer readable storage medium, wherein the computer readable storage medium stores a program, and the program is executed by a processor to realize the method embodiments.

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

Other embodiments of the present description will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.

It will be understood that the present description is not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. A method for establishing group call is applied to a cluster core network, and the method comprises:

receiving a group call establishment request initiated by a calling user;

2. The method of claim 1, further comprising:

3. The method of claim 2, wherein before buffering the first uplink service data sent by the calling subscriber, the method further comprises:

receiving first uplink service data;

4. The method of claim 2, wherein after determining that the establishment of the downlink transmission channel with the called user is completed, the method further comprises:

5. The method according to claim 1, wherein after receiving the second uplink service data sent by the calling subscriber, checking whether there is the buffered first uplink service data in the buffer area corresponding to the calling subscriber, and if so, sending the buffered first uplink service data through the downlink transmission channel before sending the second uplink service data.

6. A cluster core network device, wherein the cluster core network device comprises:

7. The device of claim 6, wherein the device further comprises: a buffer unit for buffering the data of the data to be transmitted,

8. The clustered core network device of claim 6,

9. A cluster core network device, wherein the cluster core network device comprises: memory, processor and program stored on the memory and executable on the processor, which when executed by the processor implements the method steps of any of claims 1 to 5.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a program which, when being executed by a processor, carries out the method steps of any one of claims 1 to 5.