Uplink Shared Channel CLI Determination With SRS and Power Headroom
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining cross-link interference (CLI) on uplink shared channels, which affects the performance of user equipment (UEs) and base stations, particularly in full-duplex and half-duplex operations.
Innovation Solution
The method involves receiving a sounding reference signal (SRS) from a first UE, obtaining a CLI report from a second UE, and determining CLI from an uplink shared channel based on a power headroom report, using processors and memory to facilitate accurate interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CLI determination is performed using only SRS-based measurements, then the measurement process is simple, but the CLI determination accuracy is insufficient for uplink shared channel interference
Solution Approach 1:
The patent combines multiple information sources (SRS-based CLI reports from victim UE, power headroom reports from transmitting UE, and base station measurements) to determine CLI on the uplink shared channel. This merging of multiple measurement and reporting mechanisms resolves the contradiction by achieving accurate CLI determination through composite information processing while maintaining manageable system complexity through standardized reporting procedures.
Solution Approach 2:
The patent employs a multi-functional approach where the base station performs multiple functions: receiving SRS signals, processing CLI reports from victim UEs, analyzing power headroom reports from transmitting UEs, and synthesizing this information to determine CLI. This universal base station functionality enables accurate CLI determination across different uplink shared channel scenarios without requiring separate specialized mechanisms for each function.
2Measurement precision
If multiple reporting mechanisms (SRS, power headroom reports, CLI reports) are implemented, then CLI determination accuracy improves, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent implements preliminary action by having UEs report power headroom information and CLI measurements in advance before actual uplink shared channel transmissions occur. The base station collects and processes these reports proactively, enabling it to determine CLI accuracy without requiring real-time exhaustive measurements during data transmission, thus reducing signaling overhead while maintaining precision.
3Reliability
If CLI determination uses comprehensive reporting from both transmitting and victim UEs, then interference management accuracy improves, but processing time and system complexity increase
Solution Approach 1:
The patent implements feedback mechanisms where victim UEs provide CLI reports about received interference, and transmitting UEs provide power headroom information. The base station processes this feedback and uses it to determine CLI on the uplink shared channel. This feedback loop enables reliable interference management by continuously updating CLI determination based on actual measured conditions while maintaining efficient processing through standardized feedback formats and timely reporting.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may receive a sounding reference signal (SRS) from a first user equipment (UE). The base station may receive a cross-link interference (CLI) report from a second UE based at least in part on the SRS. The base station may determine a CLI from an uplink shared channel based at least in part on a power headroom report for the uplink shared channel received from the first UE and the CLI report received from the second UE. Numerous other aspects are provided.