Sidelink Full-Duplex Beam Pair Selection Using Self-Interference Feedback
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently selecting full duplex transmit-receive beam pairs for sidelink communications, leading to interference issues.
Innovation Solution
A method and apparatus for UE devices to perform Tx beam sweeping and self-interference measurements to determine candidate full duplex Tx-Rx beam pairs, allowing for selection based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional beam pair selection methods are used for sidelink communications, then device complexity is reduced, but interference between transmit and receive signals increases
Solution Approach 1:
The patent performs self-interference measurements during a beam sweeping phase before final beam pair selection. By preliminarily measuring self-interference levels for candidate beams and sharing this information with the peer device, the system identifies and avoids high-interference beam pairs in advance, preventing interference issues rather than resolving them later
Solution Approach 2:
The patent implements a feedback mechanism where each device measures self-interference for candidate transmit beams and shares these measurements with the peer device. The peer device uses this feedback information to select receive beams that minimize interference from the first device's transmit signals, creating a closed-loop system that optimizes beam pair selection based on actual interference characteristics
2Productivity
If full duplex beam pair selection with self-interference measurements is implemented, then communication efficiency is improved, but measurement and coordination overhead increases
Solution Approach 1:
The patent combines the beam sweeping procedure with self-interference measurements into a single operational phase. Instead of performing separate beam scanning and separate interference measurements, the system measures self-interference levels during the beam sweeping process itself, merging two functions into one efficient operation that reduces overall overhead
Solution Approach 2:
The patent makes the beam sweeping process multi-functional by using it both for traditional beam quality assessment and for self-interference measurement. The same reference signal transmissions used for beam selection also serve as the source for measuring self-interference levels, eliminating the need for dedicated interference measurement signals and reducing protocol complexity
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE, reference signals using transmit (Tx) beams of the first UE based at least in part on a Tx beam sweeping, wherein self-interference measurements associated with the first UE are based at least in part on the reference signals. The first UE may transmit, to the second UE, an indication of candidate full duplex Tx-Rx beam pairs, wherein the candidate full duplex Tx-Rx beam pairs are based at least in part on the self-interference measurements. The first UE may receive, from the second UE, an indication of a full duplex Tx-Rx beam pair selection from the candidate full duplex Tx-Rx beam pairs. Numerous other aspects are described.