SBFD Resource Transmission with Dynamic TRP Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing self-interference and cross-link interference in full-duplex communications using multiple transmission-reception points (TRPs), particularly for user equipment (UEs) that are half-duplex capable, limiting their ability to maintain communication during sub-band full duplex (SBFD) symbols.
Innovation Solution
The UE switches from multiple TRP (mTRP) communication to single TRP (sTRP) communication during SBFD symbols or switches to another TRP during SBFD symbols to maintain communication, allowing for continued mTRP communication by configuring the UE to switch between TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If half-duplex UEs use mTRP communication in SBFD symbols, then communication capacity is improved, but self-interference and cross-link interference increase
Solution Approach 1:
The patent applies dynamic TRP switching where the UE transitions from static mTRP communication to dynamic sTRP communication based on the SBFD symbol configuration. The UE switches between different TRPs (first TRP, second TRP, third TRP, fourth TRP) depending on whether the current symbol is SBFD or non-SBFD, allowing the system to adapt to changing interference conditions and maintain communication capacity while managing interference.
2Object-affected harmful factors
If half-duplex UEs switch to sTRP communication during SBFD symbols, then interference is reduced, but communication continuity is affected
Solution Approach 1:
The patent ensures communication continuity by implementing a switching mechanism that maintains active communication during SBFD symbols. When the UE detects an SBFD symbol, it switches from mTRP to sTRP communication mode, and when non-SBFD symbols occur, it switches back to mTRP mode. This continuous switching ensures that communication never stops, maintaining both reliability and interference management.
Solution Approach 2:
The patent employs feedback mechanisms where the UE receives wireless configurations from network entities that indicate whether upcoming symbols are SBFD or non-SBFD. Based on this feedback information, the UE proactively switches between TRP configurations before interference issues arise, ensuring continuous communication and proper interference management without needing to wait for interference to occur.
3Adaptability or versatility
If the UE configures to switch between TRPs during SBFD symbols, then full-duplex communication capability is enabled, but device complexity increases
Solution Approach 1:
The patent implements a universal TRP switching mechanism that handles multiple communication scenarios through a single framework. The same switching logic applies whether the UE is communicating with the first TRP, second TRP, third TRP, or fourth TRP. The wireless configuration from network entities provides universal guidance for both SBFD and non-SBFD symbols, simplifying the implementation of full-duplex capability across different TRP configurations.
Data Source
AI summary
Aspects of the disclosure are directed to methods and techniques for wireless communication between a half-duplex user equipment (UE) and a base station comprising multiple transmission/reception points (mTRPs). In one example, the UE may fall back from an mTRP communication scheme to a single-TRP (sTRP) communication scheme. Here, the UE may go from receiving downlink signaling from mTRPs during a non-subband full-duplex (non-SBFD) downlink symbol (e.g., as part of a downlink TDD slot) to receiving a downlink signal from a single TRP during an SBFD downlink symbol.