MCPTT Location Reporting via RRC Connection Request
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE/LTE-A systems, lack precise methods for reporting location information during Mission Critical Push To Talk (MCPTT) services, which is essential for providing efficient and accurate location-based communication services.
Innovation Solution
A method and apparatus for reporting location information in a wireless access system supporting MCPTT services, where user equipment (UE) receives a location information request from an enhanced Node B (eNB) during a random access procedure and transmits a connection request message including its location information through a control channel, allowing for efficient location reporting during the initiation of MCPTT services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If location information is reported during random access procedure for MCPTT service, then location accuracy and service efficiency are improved, but network signaling overhead and processing complexity increase
Solution Approach 1:
The patent combines location information reporting with the existing random access procedure for MCPTT service initiation. The UE includes location information in the RRC Connection Request message that is already being transmitted during random access, rather than adding a separate reporting mechanism. This merging approach achieves accurate location reporting while avoiding additional signaling overhead and processing complexity.
Solution Approach 2:
The RRC Connection Request message is enhanced to serve multiple functions: establishing RRC connection, indicating MCPTT service requirement, and reporting location information. This multi-functionality eliminates the need for separate dedicated messages for each purpose, reducing overall signaling overhead while maintaining comprehensive information reporting.
2Loss of time
If location information is transmitted during random access procedure, then timely location reporting is achieved, but control channel resources are consumed
Solution Approach 1:
The patent merges location information transmission with the existing RRC Connection Request message transmitted on control channels during random access. By combining multiple information types into a single message transmitted through existing protocols and channels, the patent achieves timely location reporting without allocating additional dedicated control channel resources.
Solution Approach 2:
The location information is prepared and included in the RRC Connection Request message before the actual MCPTT service communication begins. This preliminary action ensures that location information is available immediately when needed for service setup, eliminating delays while utilizing already-allocated control channel resources for the connection establishment.
3Productivity
If location information request is sent during random access, then location reporting efficiency is improved, but network signaling overhead increases
Solution Approach 1:
The patent combines the location information request and response with the existing RRC Connection Request/Setup message exchange during random access procedure. The eNB includes location request information in the RRC Connection Setup message, and the UE responds with location information in the RRC Connection Setup Complete message, utilizing already-exchanged signaling messages rather than adding separate dedicated request-response pairs.
Solution Approach 2:
The RRC Connection Setup and Setup Complete messages are enhanced to serve multiple purposes: establishing RRC connection, confirming MCPTT service capability, and exchanging location information. This multi-functionality reduces the need for separate dedicated signaling messages, thereby improving reporting efficiency while minimizing additional signaling overhead.
Data Source
AI summary
The present invention provides a method and apparatus for supporting a MCPTT services. One of the methods according to embodiments of the present invention comprises steps of receiving a location information request message from a enhance Node B (eNB) during a random access procedure; transmitting a connection request message including location information of the UE through a control channel to the eNB; and performing the MCPTT service with two or more users, wherein the random access procedure is performed for an initiation of the MCPTT service, and the MCPTT service is used for a public safety and utility services and provides communication among the two or more users with the UE.