Sidelink Interference Measurement via Reused PSSCH and DMRS Resources
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Solution Overview
Problem
Current wireless communication systems face challenges in managing interference in sidelink communications, which affect the reliability and efficiency of applications requiring high reliability, such as ultra-reliable low latency communications (URLLC), virtual reality (VR), augmented reality (AR), and extended reality (XR), due to the lack of defined interference measurement mechanisms.
Innovation Solution
Repurpose configured physical sidelink shared channel (PSSCH) and demodulated reference signal (DMRS) resources for interference measurement by puncturing or rate matching, allowing adaptation to operating conditions and improving channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PSSCH and DMRS resources are dedicated for data transmission only, then data transmission efficiency is maintained, but interference measurement capability is lost
Solution Approach 1:
The patent applies multi-functionality by enabling PSSCH and DMRS resources to serve dual purposes: data transmission and interference measurement. The receiving UE measures interference on resources configured for data transmission, allowing the same physical resources to fulfill both functions simultaneously, thereby resolving the contradiction between maintaining data transmission efficiency and enabling interference measurement capability.
2Measurement precision
If interference measurement resources are added to the sidelink resource pool, then interference measurement capability is improved, but resource pool complexity increases
Solution Approach 1:
The patent eliminates the need for separate interference measurement resources by making existing data transmission resources serve dual purposes. The gNB configures the receiving UE to measure interference on PSSCH and/or DMRS resources that are already part of the sidelink resource pool, avoiding any increase in resource pool complexity while enabling interference measurement capability.
3Measurement precision
If established wireless channel measuring mechanisms are used in complex and dynamic environments, then channel measurement is performed, but reliability is undermined due to signal attenuation and blocking
Solution Approach 1:
The patent implements feedback mechanisms where the receiving UE reports channel state information (CSI) and interference measurements back to the transmitting UE and gNB. This feedback loop enables continuous adaptation to changing channel conditions, allowing the system to maintain measurement reliability in complex and dynamic environments by adjusting transmissions based on real-time channel quality and interference levels.
Solution Approach 2:
The patent enables dynamic adaptation of channel measurements and interference measurements based on real-time channel conditions. The system can dynamically select which resources to use for interference measurement and adjust measurement configurations according to varying environmental conditions, thereby maintaining reliability in dynamic scenarios where static measurement mechanisms fail.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for interference measurement and reporting in sidelink. One aspect provides a method of wireless communication by a first user equipment (UE), including receiving signaling indicating resources, within a sidelink resource pool, that are configured for sidelink interference measurement. The method further includes transmitting, to at least a second UE, a first interference report that is based on interference measurements taken on the indicated resources.