Sidelink Beam Sweeping for Hidden-Node UE Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Sidelink transmissions between user equipment (UEs) are impaired due to hidden nodes and beam misalignment, leading to interference and decoding issues.
Innovation Solution
Implement beam-associated inter-user-equipment (IUC) coordination through beam sweeping patterns to fine-tune transmit and receive beams, enabling sensing and resource selection operations for sidelink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam sweeping pattern is implemented for IUC coordination, then beam alignment accuracy is improved, but device complexity increases
Solution Approach 1:
The beam sweeping process is segmented into multiple discrete beam directions that are swept sequentially. Each beam direction is tested independently, allowing the system to identify the optimal beam pair through systematic division of the spatial search space into manageable segments.
Solution Approach 2:
The beam sweeping operation follows a periodic pattern where transmit beams and receive beams are swept in coordinated cycles. This periodic action allows both UEs to systematically explore different beam directions and establish optimal beam pairs through repeated measurement cycles.
2Object-generated harmful factors
If spatial filtering is applied to transmit beam for SCI transmission, then interference to other UEs is reduced, but hidden nodes cannot detect SCI leading to resource collision
Solution Approach 1:
The patent applies preliminary action by having UEs perform sensing operations before resource selection. Through beam sweeping and SCI detection in preliminary phases, UEs identify optimal beams and detect reserved resources beforehand, preventing collisions before they occur.
Solution Approach 2:
The system implements feedback mechanisms where UEs detect SCI from other transmitters and use this information to adjust their own resource selections. The sensing feedback allows hidden nodes to become aware of reserved resources and avoid collisions in subsequent transmissions.
3Adaptability or versatility
If dual mobility is enabled for UE movement, then communication flexibility is improved, but beam misalignment occurs due to rotation and displacement
Solution Approach 1:
The beam management system is made dynamic to adapt to UE movement. The beam sweeping mechanism continuously updates beam pairs as UEs move, and the system dynamically adjusts beam directions to maintain optimal alignment despite changes in relative position and orientation.
Solution Approach 2:
The system performs preliminary beam sweeping and measurement actions before communication begins. This preliminary beam establishment creates a baseline alignment that can be referenced and adjusted as UEs move, maintaining reliability through pre-established beam relationships.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. Some aspects involve enhancing an inter-user-equipment coordination (IUC) framework to enable user equipment (UE) to perform beam sweeping over the sidelink. Some aspects more specifically relate to fine-tuning beams, such as transmit beams or receive beams, using one or more IUC requests. In some aspects, multiple transmit beams or multiple receive beams may carry respective IUC requests and associated beam signals. In some aspects, one transmit beam or one receive beam may carry an IUC request and associated beam signal, multiple remaining transmit beams or receive beams may carry associated beam signals, and the transmit UE or the receive UE may identify a fine-tuned transmit beam or a fine-tuned receive beam responsive to, based on, or otherwise associated with the IUC request and associated beam signals.