Sidelink Beam Coordination for Sensing-Communication Conflicts
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Solution Overview
Problem
In wireless communications systems, UEs performing sensing operations may ignore communication signals, leading to conflicts with other UEs that are unaware of these operations, resulting in inefficient resource utilization and potential interference.
Innovation Solution
A UE transmits a sidelink reservation message indicating reserved resources for sensing operations and a control message specifying decoding intentions, allowing other UEs to coordinate their transmissions to avoid conflicts by refraining from sending messages during these reserved periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensing UE performs sensing operations and ignores communication signals during reserved resources, then sensing operation reliability is improved, but communication resource utilization deteriorates due to other UEs being unaware and potential interference
Solution Approach 1:
The sensing UE provides feedback to other UEs through a control message indicating whether it will perform decoding operations during reserved sensing resources. This feedback mechanism enables other UEs to adjust their transmission behavior accordingly, resolving the information asymmetry that causes interference while maintaining efficient resource utilization.
Solution Approach 2:
The sensing UE performs preliminary action by transmitting the control message before the sensing operation occurs, informing other UEs in advance about its decoding intentions during reserved resources. This allows other UEs to proactively adjust their transmission plans and avoid potential interference.
2Object-affected harmful factors
If other UEs refrain from transmitting communication signals during sensing resources, then interference is reduced, but resource utilization efficiency deteriorates due to unused available resources
Solution Approach 1:
The system transitions from a static resource allocation approach to a dynamic one where transmission decisions are adjusted in real-time based on the sensing UE's decoded intentions. Other UEs can dynamically refrain from transmitting only when necessary, maximizing resource utilization while minimizing interference.
Solution Approach 2:
The control message conveys parameter changes in the sensing UE's operational state (whether it will perform decoding or not). This parameter information enables other UEs to adapt their transmission parameters accordingly, optimizing both interference reduction and resource utilization.
3Productivity
If a sensing UE attempts to decode communication signals during sensing resources, then resource utilization is improved, but sensing operation performance deteriorates due to beam conflicts
Solution Approach 1:
The system segments the resource usage into distinct time periods: reserved sensing resources and non-reserved resources. This segmentation allows the sensing UE to perform sensing operations during reserved resources without beam conflicts, while still enabling communication transmissions during non-reserved resources, thus maintaining both sensing performance and resource utilization.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. For example, a user equipment (UE) in sidelink communication may coordinate directly with other UEs to reduce or prevent scenarios in which the UE is performing sensing and communication operations at the same time even in cases where different beam parameters are used for sensing and communication. For example, a sensing UE may be configured to perform sensing operations and ignore communication signals when performing the sensing operations. In such cases, other UEs may be aware that the sensing UE may not attempt to decode communications signals. Thus, the other UEs may refrain from transmitting communications signals to the sensing UE (e.g., when the sensing UE is performing a sensing operation) during the reserved sidelink resources.