Sidelink Beam Pair Selection for Reliable Terminal Communication
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Solution Overview
Problem
The reliability of communication in sidelink (SL) for terminal apparatuses is a pressing issue that needs to be addressed.
Innovation Solution
A method involving the transmission and reception of multiple reference signals and channel measurement results to determine both transmit and receive beams, using preset thresholds to ensure optimal beam selection, thereby improving communication reliability and reducing resource overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal apparatus determines transmit beam and receive beam separately using existing beam management procedures, then beam selection can be performed, but communication reliability is insufficient
Solution Approach 1:
The patent combines transmit beam determination and receive beam determination into a unified beam management procedure. The terminal apparatus determines both transmit and receive beams based on channel measurement results from the same reference signals, merging two separate beam selection processes into one integrated procedure, thereby improving communication reliability without proportionally increasing complexity
Solution Approach 2:
The patent enables the terminal apparatus to use the same beam management procedure for both transmit and receive beam determination. The first terminal apparatus performs both functions using channel measurements from first reference signals, making the beam management mechanism multi-functional and improving reliability through consistent beam selection criteria
2Reliability
If multiple reference signals and channel measurement results are used to determine beams, then communication reliability is improved, but resource overheads increase
Solution Approach 1:
The patent designs the first reference signals to serve dual purposes: they enable channel measurement for transmit beam determination and provide basis for receive beam determination. This multi-functional use of reference signals improves communication reliability through comprehensive measurements while minimizing resource overheads by avoiding redundant signaling
Solution Approach 2:
The patent optimizes the number of reference signals and measurement results used (N, P, M parameters) to achieve the necessary measurement precision for reliable beam selection without excessive resource consumption. By carefully controlling these parameters, the system achieves improved reliability while managing resource overheads effectively
Data Source
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AI summary
This application pertains to the field of communication technologies, and provides a communication method and apparatus, to improve reliability of communication of a terminal apparatus in an SL. In the method, a first terminal apparatus may determine a transmit beam based on M first channel measurement results carried in M first signals, and determine a receive beam based on M second channel measurement results corresponding to the M first signals. Compared with existing beam management in which a terminal apparatus determines a transmit beam only based on a channel measurement result carried in a feedback signal, or determines a receive beam only based on a channel measurement result obtained by measuring a received reference signal, in this method, the first terminal apparatus may determine both a transmit beam and a receive beam for subsequent signal sending and receiving, so that reliability of communication of the first terminal apparatus can be improved. In addition, this method simplifies a beam management procedure, to reduce resource overheads and improve resource utilization.