Sidelink Reference Signal Configuration for Wireless Communication
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Solution Overview
Problem
Current sidelink reference signals (SL-RS) in wireless communication systems are limited by their dependence on data transmission bandwidth, leading to inefficiencies and resource constraints, particularly in channel estimation and communication reliability.
Innovation Solution
Implementing an enhanced SL-RS configuration that operates independently of data transmission bandwidth, allowing for a wider frequency bandwidth and flexible resource allocation, enabling standalone transmission and improved channel estimation without multiplexing with data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If SL-RS is multiplexed with data transmission on PSSCH, then resource allocation is simplified, but frequency bandwidth is limited by PSSCH bandwidth and transmission reliability deteriorates
Solution Approach 1:
The patent segments the SL-RS transmission from data transmission by introducing independent resource allocation for SL-RS. The SL-RS can be transmitted on separate physical resources (PSSCH or dedicated SL-RS resources) with independent bandwidth configuration, allowing the reference signal to be separated from data multiplexing constraints while maintaining resource efficiency through configurable association with data resources.
2Device complexity
If SL-RS frequency bandwidth is tied to PSSCH bandwidth, then resource configuration is simplified, but channel estimation precision deteriorates due to limited bandwidth
Solution Approach 1:
The patent introduces dynamic and flexible bandwidth configuration for SL-RS that is independent of PSSCH bandwidth. The SL-RS bandwidth can be separately configured through higher-layer parameters, allowing the system to adapt the reference signal bandwidth to channel estimation requirements without being constrained by data transmission bandwidth, thereby improving measurement precision while maintaining configurable complexity management.
3Loss of information
If SL-RS transmission is dependent on data transmission, then signaling overhead is reduced, but transmission flexibility and resource efficiency deteriorate
Solution Approach 1:
The patent applies local quality by allowing different transmission modes for SL-RS depending on the specific scenario. The SL-RS can be transmitted with full independence from data when channel estimation requires wider bandwidth or more flexible scheduling, while still allowing multiplexing with data when resources are constrained. This localized optimization of transmission independence versus multiplexing achieves better resource efficiency without excessive signaling overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive an indication of a configuration for transmitting a sidelink reference signal (SL-RS) that is to be transmitted independently of data transmission and that has a frequency bandwidth that is independent of a frequency bandwidth configured for transmission on a physical sidelink shared channel. The UE may transmit the SL-RS to a second UE according to the configuration. Numerous other aspects are described.