Sidelink Beam Coordination Using Beam-Specific IUC Resources
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Solution Overview
Problem
In wireless communications systems, there is a challenge in establishing effective beam pairs for sidelink communications due to varying beam-specific assistance information and channel sensing limitations, leading to suboptimal resource selection by user equipment (UEs).
Innovation Solution
User equipment (UEs) transmit and receive inter-user equipment coordination (IUC) messages on multiple beams, providing beam-specific preferred and non-preferred resource information to establish optimal beam pairs, and measure channel busy ratios (CBR) to improve resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs transmit and receive IUC messages on multiple beams with beam-specific assistance information, then beam pair establishment quality is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments beam-specific assistance information into multiple IUC messages, where each message corresponds to a specific beam. This allows the receiving UE to process and evaluate beam quality information in a structured manner, improving beam pair establishment while managing complexity through organized information delivery.
Solution Approach 2:
The transmitting UE sends beam-specific assistance information in advance through IUC messages before actual sidelink communication establishes. This preliminary action allows the receiving UE to pre-evaluate beam quality and make informed decisions about beam pair selection, improving connection reliability without adding real-time complexity.
2Reliability
If UEs select optimal resources for sidelink communications based on IUC messages, then communication quality is improved, but resource selection complexity increases
Solution Approach 1:
The IUC message mechanism provides feedback from the receiving UE to the transmitting UE about preferred and non-preferred resources. This feedback loop enables the transmitting UE to select optimal resources based on actual channel conditions and receiver preferences, improving communication quality while automating the selection process to manage complexity.
Solution Approach 2:
The system enables UEs to autonomously select optimal resources by processing IUC messages and making independent decisions about resource allocation. This self-service approach improves communication quality through UE-specific optimization while reducing the need for complex centralized resource management.
3Productivity
If UEs measure channel busy ratio (CBR) to improve resource management, then resource utilization efficiency is improved, but measurement and processing overhead increases
Solution Approach 1:
The CBR measurement acts as an intermediary metric that summarizes complex channel conditions into a single value representing resource availability. By measuring CBR on selected beams, the system efficiently evaluates resource utilization without needing to analyze every individual resource parameter, improving resource management while controlling measurement overhead.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A receiving user equipment (UE) may broadcast messages containing inter-UE cooperation (IUC) information using multiple beams. The IUC information transmitted on each beam may be different for each beam of the receiving UE. For example, each IUC information may contain different preferred resources or non-preferred resources for the receiving UE to receive a transmission from a transmitting UE. The transmitting UE may receive a message containing IUC information from one of the beams of the receiving UE and transmit a signal using resources based on the IUC information contained in the received message. In some examples, the transmitting UE may transmit a channel busy ratio (CBR) request to a receiving UE. The CBR request may specify a transmission configuration indicator (TCI) state, spatial relation, spatial domain filter, or beam according to which the receiving UE is to measure the CBR.