Sidelink Relay Selection via RSRP Measurement
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Solution Overview
Problem
In 3GPP, the study of sidelink communication techniques for direct terminal apparatus communication without a core network poses challenges in efficient communication control, particularly in selecting the responsible terminal apparatus for forwarding sidelink transmissions.
Innovation Solution
A terminal apparatus is designed to receive messages from other terminal apparatuses, determine information based on Reference Signal Received Power (RSRP), and transmit messages to select the appropriate terminal apparatus for forwarding sidelink transmissions, utilizing a processing unit and integrated circuit for efficient communication control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal apparatuses directly communicate via sidelink without core network involvement, then communication efficiency is improved, but communication control becomes more difficult
Solution Approach 1:
The patent introduces a base station as an intermediary that provides control messages to terminal apparatuses for sidelink communication. The base station transmits control information that enables terminals to perform direct communication while maintaining network-controlled coordination, thus improving efficiency without excessive complexity
Solution Approach 2:
The patent divides communication control into separate functions: the base station handles high-level coordination and control message generation, while terminal apparatuses handle local message transmission and RSRP-based relay selection. This segmentation allows each component to focus on specific tasks, improving overall system efficiency
2Adaptability or versatility
If multiple terminal apparatuses are involved in sidelink communication, then communication versatility is improved, but selecting the responsible forwarding terminal becomes more complex
Solution Approach 1:
The patent implements a feedback mechanism where terminal apparatuses measure RSRP values of control messages from the base station and report this information back. The base station uses this feedback to determine which terminal should forward sidelink transmissions, simplifying the selection process in multi-terminal scenarios
Solution Approach 2:
The patent replaces complex multi-terminal negotiation protocols with a base station-centered control mechanism. Instead of terminals autonomously negotiating relay selection, the base station assigns forwarding responsibilities based on RSRP measurements, reducing computational complexity and protocol overhead
Data Source
AI summary
A first terminal apparatus for performing sidelink communication receives a first message from a second terminal apparatus, determines information based on a Reference Signal Received Power (RSRP) of the first message received from the second terminal apparatus, and transmits a second message including the information to a third terminal apparatus, wherein the first message and the second message are messages used to select a terminal apparatus being responsible to forward a sidelink transmission of the second terminal apparatus to the third terminal apparatus.