LTE Trunk Service Logical Channel Design for Group Call Resource Efficiency
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Solution Overview
Problem
The LTE network lacks a networking policy to support trunk communication, preventing point-to-multipoint half duplex real-time communication and wasting resources due to the need for dedicated bearers for each user in telephone conferences.
Innovation Solution
Implementing a method that sets up a Trunk Paging Channel (TPCH), Trunk Group Control Channel (TGCCH), and Trunk Group Traffic Channel (TGTCH) to enable trunk user terminals to monitor and configure bearer resources, allowing point-to-multipoint group calls without dedicated bearers, using a Trunk Paging Radio Network Temporary Identifier (TP-rnti) and Trunk Radio Network Temporary Identifier (T-rnti) for configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated bearer resources are set up for each user in telephone conferences, then individual user communication quality is improved, but air interface resources are wasted
Solution Approach 1:
The patent merges multiple users' communication resources into a shared group call bearer. Instead of establishing separate dedicated bearers for each user in a telephone conference, the system creates a single group call bearer that multiple users can share simultaneously, thereby reducing air interface resource consumption while maintaining communication quality through the shared resource pool.
Solution Approach 2:
The group call bearer is designed to serve multiple functions and multiple users simultaneously. A single bearer resource can be dynamically allocated to different users within the group call context, enabling one resource to fulfill multiple communication needs rather than requiring dedicated resources for each user.
2Adaptability or versatility
If point-to-multipoint half duplex real-time communication is implemented, then trunk communication requirements are met, but LTE network configuration complexity increases
Solution Approach 1:
The patent segments the communication functionality into distinct logical channels: a control channel for signaling and resource allocation, and a traffic channel for actual voice/data transmission. This segmentation allows the complex point-to-multipoint communication to be managed through separate, specialized channels, reducing overall system complexity while enabling trunk communication capabilities.
Solution Approach 2:
The patent introduces a group call control mechanism as an intermediary layer between the LTE network infrastructure and the trunk communication requirements. This control layer manages the point-to-multipoint connections, handles resource allocation, and coordinates communication between users, thereby meeting trunk communication needs without requiring fundamental changes to the underlying LTE network configuration.
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AI summary
A method and trunk user terminal for implementing a trunk service based on LTE is disclosed. The trunk user terminal includes: a first monitoring unit, configured to monitor a trunk paging channel (TPCH); a group call request unit, configured to initiate a group call; a second monitoring unit, configured to: after the first monitoring unit monitors a group call message through the TPCH, monitor a trunk group control channel (TGCCH) on a network side to obtain configuration information of a trunk group traffic channel (TGTCH) issued on the TGCCH; and a third monitoring unit, configured to establish a local TGTCH bearer based on the configuration information to monitor the TGTCH. In the embodiments of the present invention, a logical channel is added at a trunk UE end, so as to implement a group call process of a trunk UE to other trunk UEs in a cell, implement a point-to-multipoint call, avoid establishment of a plurality of dedicated bearers, and meet the communication demands of an LTE trunk service.