PUSCH Rate Matching Patterns for SBFD Uplink Muting
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Solution Overview
Problem
Wireless communication systems face challenges with cross-link interference (CLI) during full-duplex operations, leading to inaccurate CLI measurements and reduced communication reliability, especially when uplink transmissions overlap, resulting in poor channel performance and increased latency.
Innovation Solution
Implementing frequency-based rate matching patterns for physical uplink shared channel (PUSCH) transmissions, where rate matching is applied to specific symbols indicated by configuration information, to optimize resource usage and minimize interference through uplink muting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex operations are implemented to improve spectral efficiency and system capacity, then productivity is improved, but cross-link interference occurs leading to reduced reliability
Solution Approach 1:
The patent segments the uplink transmission resources by introducing frequency-based rate matching patterns that divide the frequency spectrum into sub-bands. This segmentation allows certain frequency resources to be muted or adjusted to reduce cross-link interference while maintaining full-duplex operations in other sub-bands, thereby resolving the contradiction between spectral efficiency and communication reliability
Solution Approach 2:
The patent applies local quality by configuring different rate matching patterns for different frequency sub-bands and time symbols. Instead of uniformly muting all uplink resources, the system selectively applies rate matching to specific symbols and sub-bands where cross-link interference occurs, preserving transmission quality in unaffected regions while mitigating interference locally
2Productivity
If uplink transmissions are increased to improve data throughput, then productivity is improved, but cross-link interference increases leading to poor channel performance
Solution Approach 1:
The patent implements periodic action through configured rate matching patterns that periodically mute specific uplink symbols based on downlink-uplink symbol patterns. This periodic muting structure allows the system to maintain high data throughput in non-muted symbols while periodically reducing interference in symbols where full-duplex operations cause cross-link interference
Solution Approach 2:
The patent introduces dynamics by making the rate matching pattern configurable and adaptable to different traffic conditions and interference scenarios. The network can dynamically adjust which symbols and sub-bands are subject to rate matching based on real-time channel conditions, allowing the system to optimize the balance between data throughput and interference reduction
3Reliability
If rate matching is applied to multiple symbols to reduce interference, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies partial action by configuring rate matching to apply to only one or two specific uplink symbols out of many available symbols, rather than applying it to all symbols. This selective approach maintains communication reliability in the most critical interference-prone symbols while minimizing the complexity overhead of configuring and processing rate matching patterns across the entire transmission
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. Techniques described herein provide for uplink transmission procedures and techniques to utilize rate matching from one or more resource muting patterns. A UE may receive a physical uplink shared channel (PUSCH) configuration indicating rate matching information. From the rate matching information, the UE may determine a frequency-based rate matching pattern for one or two symbols where rate matching is to be applied. A UE may send a PUSCH transmission to a network entity in accordance with the frequency-based rate matching pattern.