CN113179493A - Method for improving call right party connection efficiency in B-Trunc group call service - Google Patents
Method for improving call right party connection efficiency in B-Trunc group call service Download PDFInfo
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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
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/121—Wireless traffic scheduling for groups of terminals or users
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
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- H—ELECTRICITY
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- 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]
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Abstract
The invention discloses a method for improving the connection efficiency of a speaking right party in a B-trunk group calling service. The method comprises the following steps: step 1, a user terminal initiates a group call; step 2, after the user finishes speaking, the terminal initiates a speaking right release flow to the core network; step 3, when the user in the group needs to speak, the terminal initiates a speaking right application process; step 4, group calling release flow; the invention has the following advantages: 1. the method for establishing the data channel in advance and reserving the data channel for the user can simplify the speaking right application process; 2. the method of the invention reduces the network delay, and can get through the data channel for the user as soon as possible when the cluster user in the group calling service applies for the right of call; 3. the method of the invention improves the speaking right connection efficiency.
Description
Technical Field
The invention belongs to the technical field of network communication, and particularly relates to a method for improving the connection efficiency of a speaking right party in a B-trunk group calling service.
Background
At present, in order to implement the transition from analog trunking service to broadband trunking service, the broadband trunking (B-TrunC) industry alliance has established a B-TrunC protocol in combination with the 3GPP LTE protocol and the characteristics of trunking service to implement broadband trunking service, including various broadband trunking services of trunking voice, video call, and trunking multimedia. In the B-TrunC protocol cluster, the end-to-end protocol describes the flow of talk right management in the group call service. The system architecture comprises a cluster terminal, a base station and core network equipment.
The TCN (Trunking Core Network) includes functional entities of an eMME (enhanced mobility management entity), a TCF (Trunking control plane function), a TMF (Trunking media function), an eHSS (enhanced home subscriber server), and an SGW (serving gateway), and completes functions of access control, radio link management, mobility management, session management, and Trunking service control in the B-TrunC Network. The TCF (Trunking Control Function) functions include registration and cancellation of Trunking users, establishment and release of Trunking single call flows, establishment and release of Trunking group call flows, and group call right management group call extension, and in the call process, the allocation and release of Trunking bearer resources are realized through a network element eMME. T-eNB (trunked-Evolved Node B, i.e. a trunked base station) provides the functions of UE radio resource allocation and trunked group call resource allocation. For example, the patent application with application number 2011101537034 discloses a method for implementing group call service, which is implemented based on a broadband digital trunking communication system implemented based on TD-LTE technology; because the TD-LTE system adopts a full IP and flat network architecture, and a base station can directly communicate with a core network, the time delay of a control plane and a user plane is small, so that the call establishment time is shortened, and the transmission time delay of a wireless network is greatly reduced because the TD-LTE technology adopts an advanced air interface technology; in addition, in the group call establishment process, a mode of parallel processing signaling messages is adopted, namely resources are allocated to the calling terminal and the called terminal in parallel, and a radio bearer and an S1 bearer are established.
In summary, the trunking terminal provides the terminal of the trunking service of single call and group call for the user. The trunking group calling service is one of basic trunking services, a network plans a plurality of terminals to belong to a certain group, a terminal user knows the group to which the terminal user belongs in advance, and the terminal user initiates a half-duplex voice or video call to the group; the network side establishes a public downlink data channel for the members in the group, and simultaneously establishes an uplink data channel for the calling terminal or the dispatching desk to complete the group calling establishing process; after the group calling is established, the speaking right side terminal speaks to the members in the group, and the members in the group hear the speaking right side; the users in the group initiate speaking right application, the core network informs the users of speaking right authorization after distributing resources for the users, and the speaking right party can speak; and in the speaking process, the voice data or the video data of the speaking right party is sent to the core network through a special channel, and the core network sends the voice data stream or the video data stream of the speaking right party to the terminals in the group through a public data channel. In order to guarantee the voice and video quality of the speaking right party, the cluster core network establishes a special bearer for the speaking right party so as to provide higher bandwidth.
In the group calling process, the speaking right party is changed frequently, the terminal equipment and the core network equipment need to establish a communication channel for the speaking right party as soon as possible, and a user can not feel delay as much as possible. However, the prior art has the following defects: when the user speaking right changes, a speaking right user terminal is required to initiate a speaking right application flow, and when the speaking right is applied, the terminal, the base station and the core network are required to perform a cluster private bearer establishment flow so as to provide a broadband data transmission channel for a speaking right user, and the complicated flow increases the time for establishing the speaking right.
Disclosure of Invention
The invention aims to provide a method for improving the connection efficiency of a speaking right party in a B-trunk group calling service, which can overcome the technical problems, and the method comprises the following steps:
step 1.1, a calling terminal sends a call request message to a network side, initiates a group call, and carries media parameters of the terminal and a called group number;
step 1.2, the network establishes group calling resources for the group, including core network load, base station group calling resources and network resources of wireless channel, and establishes a shared downlink data channel for the called user:
step 1.2.1, a core network initiates a group calling context establishment request to a base station, carries a shared bearing identifier and an NAS (Non-Access-Stratum) message group calling establishment instruction;
step 1.2.2, after the base station distributes the empty resource, the base station replies a group call context establishment response message to the core network, and the response message carries the user plane address of the base station and the distributed downlink data tunnel identification; the core network finishes the group calling group resource establishment after updating the tunnel information;
step 1.3, initiating a cluster special bearer establishing process to a calling terminal, distributing core network resources and wireless resources for the terminal by a network, and establishing an uplink data channel;
step 1.4, the network side sends a group call establishment acceptance to the calling user, and the group call establishment is completed;
step 1.5, initiating a special bearing establishing process of the cluster for other user terminals in the group in advance to improve the connection efficiency of the speaking right party; according to the strategy, the method for establishing the cluster special bearing comprises the following steps:
step 1.5.1, according to the user priority configured when the user opens an account, implementing the process of establishing the cluster special bearing for the user with high priority;
step 1.5.2, configuring speaking right priority authority of users in the group when an account is opened, and implementing a cluster proprietary bearer establishing process for the users with high speaking right priority;
step 1.5.3, the TCF configures a group with a fixed scale to establish bearing resources in advance, and when the number of users in the group is less than 10, the TCF directly implements a cluster-specific bearing establishment process for all the users in the group;
step 2.1, the terminal initiates a speaking right release request to a core network and carries a calling identifier;
step 2.2, the core network initiates a speaking right release confirmation message to the terminal;
step 2.3, the core network sends a speaking right notification message to the group to inform the terminals in the group that the current group calling speaking right state is idle;
step 3, when the user in the group needs to talk, the terminal initiates the speaking right application process, which comprises the following steps:
step 3.1, the terminal sends a speaking right application message to the core network, and the message carries the terminal address, the port and the media parameter information;
step 3.1.1, after receiving the speaking right application message sent by the terminal, the core network determines whether to grant the speaking right of the terminal according to the system configuration;
step 3.1.2, the user carries on the decision-making process, judge whether the user has already set up the special bearing, when the user has already set up the special bearing at present, carry on the load-bearing course of the modification cluster;
step 3.2, the core network sends a speaking right granting message to the terminal and indicates that the terminal has acquired the speaking right;
step 3.3, after receiving the speaking right granting message, the terminal sends a speaking right granting confirmation message to the core network;
step 3.4, the core network sends a speaking right notice to the users in the group, and indicates that the current group calling speaking right state is a busy state;
step 4.1, the terminal initiates a group call release request to the core network, and the group call release request carries a call identifier to be released;
step 4.2, the core network sends a group call release response message to the terminal;
step 4.3, the core network initiates a cluster special bearing release flow to the users in the group and comprises special bearing resources established for all the users;
step 4.4, the core network initiates a group calling context release request to the base station, and carries the NAS message group calling release instruction;
and 4.5, the base station sends a group call context release completion message to the core network.
The invention has the following advantages:
1. the method for establishing the data channel in advance and reserving the data channel for the user can simplify the speaking right application process;
2. the method of the invention reduces the network delay, and can get through the data channel for the user as soon as possible when the cluster user in the group calling service applies for the right of call;
3. the method of the invention improves the speaking right connection efficiency.
Drawings
FIG. 1 is a diagram of a Btrunc system architecture for the method of the present invention;
fig. 2 is a flow chart of cluster-specific bearer establishment according to the method of the present invention;
fig. 3 is a flow chart of releasing a cluster-specific bearer according to the method of the present invention;
FIG. 4 is a flow chart of a group call service establishment process according to the method of the present invention;
FIG. 5 is a flow chart of the speaking right application of the method of the present invention;
fig. 6A is a flow chart of terminal initiated talk burst release of the method of the present invention;
fig. 6B is a flow chart of the core network initiated talk burst release of the method of the present invention;
FIG. 7 is a flow chart of the speaking right application of the method of the present invention;
fig. 8 is a flow chart of the talk burst release method of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. As shown in fig. 1-6, the method of the present invention comprises the steps of:
step 1.1, a calling terminal sends a call request message to a network side, initiates a group call, and carries media parameters of the terminal and a called group number;
step 1.2, the network establishes group calling resources for the group, including core network load, base station group calling resources and network resources of wireless channel, and establishes a shared downlink data channel for the called user:
step 1.2.1, a core network initiates a group calling context establishment request to a base station, carries a shared bearing identifier and an NAS (Non-Access-Stratum) message group calling establishment instruction;
step 1.2.2, after the base station distributes the empty resource, the base station replies a group call context establishment response message to the core network, and the response message carries the user plane address of the base station and the distributed downlink data tunnel identification; the core network finishes the group calling group resource establishment after updating the tunnel information;
step 1.3, initiating a cluster special bearer establishing process to a calling terminal, distributing core network resources and wireless resources for the terminal by a network, and establishing an uplink data channel;
step 1.4, the network side sends a group call establishment acceptance to the calling user, and the group call establishment is completed;
step 1.5, initiating a special bearing establishing process of the cluster for other user terminals in the group in advance to improve the connection efficiency of the speaking right party; according to the strategy, implementing the process of establishing the cluster special bearing specifically comprises the following steps:
step 1.5.1, according to the user priority configured when the user opens an account, implementing the process of establishing the cluster special bearing for the user with high priority;
step 1.5.2, configuring speaking right priority authority of users in the group when an account is opened, and implementing a cluster proprietary bearer establishing process for the users with high speaking right priority;
step 1.5.3, the TCF configures a group with a fixed scale to establish bearing resources in advance, and when the number of users in the group is less than 10, the TCF directly implements a cluster-specific bearing establishment process for all the users in the group;
step 2.1, the terminal initiates a speaking right release request to a core network and carries a calling identifier;
step 2.2, the core network initiates a speaking right release confirmation message to the terminal;
step 2.3, the core network sends a talk right notification message to the group to inform the terminals in the group that the current group call talk right state is idle, as shown in fig. 8;
step 3, when the user in the group needs to talk, the terminal initiates the speaking right application process, which comprises the following steps:
step 3.1, the terminal sends a speaking right application message to the core network, and the message carries the terminal address, the port and the media parameter information;
step 3.1.1, after receiving the speaking right application message sent by the terminal, the core network determines whether to grant the speaking right of the terminal according to the system configuration;
step 3.1.2, the user carries on the decision-making process, judge whether the user has already set up the special bearing, when the user has already set up the special bearing at present, carry on the load-bearing course of the modification cluster;
step 3.2, the core network sends a speaking right granting message to the terminal and indicates that the terminal has acquired the speaking right;
step 3.3, after receiving the speaking right granting message, the terminal sends a speaking right granting confirmation message to the core network;
step 3.4, the core network sends a speaking right notice to the users in the group, and indicates that the current group calling speaking right state is a busy state;
the talk right release flow initiated by the core network is similar to the talk right release flow initiated by the UE, and the dedicated bearer of the UE is not released when the talk right is released, as shown in fig. 7;
step 4.1, the terminal initiates a group call release request to the core network, and the group call release request carries a call identifier to be released;
step 4.2, the core network sends a group call release response message to the terminal;
step 4.3, the core network initiates a cluster special bearing release flow to the users in the group and comprises special bearing resources established for all the users;
step 4.4, the core network initiates a group calling context release request to the base station, and carries the NAS message group calling release instruction;
and 4.5, the base station sends a group call context release completion message to the core network.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the present disclosure should be covered within the scope of the present invention claimed in the appended claims.
Claims (4)
1. A method for improving the connection efficiency of the speaking right party in the B-Trunc group calling service is characterized by comprising the following steps:
step 1, a user terminal initiates a group call, and the group call establishment process comprises:
step 1.1, a calling terminal sends a call request message to a network side, initiates a group call, and carries media parameters of the terminal and a called group number;
step 1.2, the network establishes group calling resources for the group, including core network load, base station group calling resources and network resources of wireless channel, and establishes a shared downlink data channel for the called user;
step 1.3, initiating a cluster special bearer establishing process to a calling terminal, distributing core network resources and wireless resources for the terminal by a network, and establishing an uplink data channel;
step 1.4, the network side sends a group call establishment acceptance to the calling user, and the group call establishment is completed;
step 1.5, initiating a special bearing establishing process of the cluster for other user terminals in the group in advance to improve the connection efficiency of the speaking right party; according to the strategy, implementing the process of establishing the cluster special bearing;
step 2, after the user finishes speaking, the terminal initiates a speaking right release process to the core network, which comprises the following steps:
step 2.1, the terminal initiates a speaking right release request to a core network and carries a calling identifier;
step 2.2, the core network initiates a speaking right release confirmation message to the terminal;
step 2.3, the core network sends a speaking right notification message to the group to inform the terminals in the group that the current group calling speaking right state is idle;
step 3, when the user in the group needs to talk, the terminal initiates the speaking right application process, which comprises the following steps:
step 3.1, the terminal sends a speaking right application message to the core network, and the message carries the terminal address, the port and the media parameter information;
step 3.2, the core network sends a speaking right granting message to the terminal and indicates that the terminal has acquired the speaking right;
step 3.3, after receiving the speaking right granting message, the terminal sends a speaking right granting confirmation message to the core network;
step 3.4, the core network sends a speaking right notice to the users in the group, and indicates that the current group calling speaking right state is a busy state;
step 4, the group call release process comprises the following steps:
step 4.1, the terminal initiates a group call release request to the core network, and the group call release request carries a call identifier to be released;
step 4.2, the core network sends a group call release response message to the terminal;
step 4.3, the core network initiates a cluster special bearing release flow to the users in the group and comprises special bearing resources established for all the users;
step 4.4, the core network initiates a group calling context release request to the base station, and carries the NAS message group calling release instruction;
and 4.5, the base station sends a group call context release completion message to the core network.
2. The method as claimed in claim 1, wherein the step 1.2 includes the following steps:
step 1.2.1, a core network initiates a group call context establishment request to a base station, carries a shared bearing identifier and an NAS message group call establishment instruction;
step 1.2.2, after the base station distributes the empty resource, the base station replies a group call context establishment response message to the core network, and the response message carries the user plane address of the base station and the distributed downlink data tunnel identification; and the core network finishes the establishment of the group calling group resources after updating the tunnel information.
3. The method as claimed in claim 1, wherein the step 1.5 includes the following steps:
step 1.5.1, according to the user priority configured when the user opens an account, implementing the process of establishing the cluster special bearing for the user with high priority;
step 1.5.2, configuring speaking right priority authority of users in the group when an account is opened, and implementing a cluster proprietary bearer establishing process for the users with high speaking right priority;
step 1.5.3, the TCF configures a group with a fixed scale to establish bearing resources in advance, and when the number of users in the group is less than 10, the TCF directly implements a cluster-specific bearing establishment process for all the users in the group.
4. The method as claimed in claim 1, wherein the step 3.1 comprises the following steps:
step 3.1.1, after receiving the speaking right application message sent by the terminal, the core network determines whether to grant the speaking right of the terminal according to the system configuration;
and 3.1.2, judging whether the user establishes the special bearing or not in the user bearing decision process, and modifying the cluster bearing process when the current user establishes the special bearing.
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