Sidelink Resource Allocation via Receiver Sensing
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink resource allocation, particularly in beamformed communications, where transmitter UEs struggle to detect colliding reservations due to hardware limitations, leading to reduced transmission reliability and increased power consumption.
Innovation Solution
The method involves a transmitter UE requesting sensing information from a receiver UE, including indications of transmit beam directions, allowing the receiver UE to perform sensing operations and share resource sets, which the transmitter UE can combine with its own resources to reduce the likelihood of transmission collisions and improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmitter UE performs continuous sensing operations to detect colliding reservations, then transmission reliability is improved, but power consumption increases and hardware limitations reduce detection accuracy
Solution Approach 1:
Instead of the transmitter UE performing sensing operations, the receiver UE performs the sensing and provides sensing information back to the transmitter. This inversion of roles allows the transmitter to achieve reliable collision detection without the power consumption and hardware limitations of continuous sensing at the transmitter side.
Solution Approach 2:
The receiver UE acts as an intermediary that performs sensing operations and communicates sensing results to the transmitter UE. This mediator approach enables the transmitter to benefit from accurate collision detection information without directly performing the sensing operations, thus reducing power consumption and hardware requirements.
2Device complexity
If transmitter UE performs sensing operations with limited hardware capabilities, then device complexity is reduced, but measurement precision of colliding reservations deteriorates
Solution Approach 1:
The sensing function is inverted from the transmitter UE to the receiver UE. The receiver UE, which has better reception capabilities and is already receiving signals from the transmitter, performs the sensing operations and provides accurate collision detection information back to the transmitter, overcoming the transmitter's hardware limitations.
Solution Approach 2:
The receiver UE performs sensing operations that benefit the transmitter UE. By having the receiver perform the sensing and provide the information back, the system leverages the receiver's capabilities to serve the transmitter's need for accurate collision detection without requiring the transmitter to have advanced sensing hardware.
3Reliability
If receiver UE performs sensing operations for multiple beam directions, then transmission reliability is improved, but loss of time for sensing operations increases
Solution Approach 1:
The receiver UE performs sensing operations in advance for multiple beam directions and provides the sensing information to the transmitter before transmission resource allocation is finalized. This preliminary sensing allows the transmitter to make informed decisions about resource allocation and beam selection, improving reliability without causing time loss during the actual transmission process.
Solution Approach 2:
The sensing operations are performed periodically or at scheduled intervals for multiple beam directions, allowing the system to maintain up-to-date sensing information without continuous sensing. This periodic approach balances the need for reliable collision detection with the constraint of sensing operation time.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter user equipment (UE) may transmit, to a receiver UE, a request for sensing information that includes an indication of one or more transmit beam directions. The UE may receive, from the receiver UE based at least in part on the indication of the one or more transmit beam directions, sensing information associated with a beam of a plurality of beams configured for communications between the transmitter UE and the receiver UE. Numerous other aspects are described.