UE Mobility Reporting for Full-Duplex TRP Pairing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing mobility and optimizing communication modes, particularly in full-duplex and simultaneous half-duplex multi-TRP communication scenarios, due to limitations in beam separation and self-interference management.
Innovation Solution
A method and apparatus for wireless communication that enable a user equipment (UE) to measure synchronization signal block (SSB) beams from neighbor TRPs while communicating with a serving TRP in half-duplex mode, and transmit a mobility report to a base station to indicate candidate TRPs that satisfy criteria for pairing in full-duplex or simultaneous half-duplex multi-TRP communication modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE uses traditional cell switching based on signal strength thresholds, then mobility management is simple, but full-duplex communication opportunities are lost
Solution Approach 1:
The UE performs preliminary measurements of SSB beams from neighbor TRPs while connected to the serving TRP, preparing mobility information in advance. This allows the UE to quickly transition to full-duplex mode when conditions are favorable, without waiting for traditional cell switching conditions to be met.
Solution Approach 2:
The system dynamically adjusts communication modes (half-duplex, full-duplex, multi-TRP) based on real-time channel conditions and TRP pairing opportunities. The UE can flexibly switch between different communication paradigms to optimize performance for varying network conditions.
2Productivity
If the UE switches to full-duplex mode with neighbor TRP, then spectral efficiency improves, but self-interference management becomes challenging
Solution Approach 1:
The system converts the potential harmful self-interference in full-duplex mode into a manageable parameter by selecting TRP pairs with sufficient spatial separation. The interference issue is transformed into a TRP pairing optimization problem, where appropriate TRP selection turns a harmful effect into an acceptable trade-off for achieving full-duplex spectral efficiency.
Solution Approach 2:
The network acts as an intermediary by evaluating TRP pairing candidates and selecting combinations that minimize self-interference. The base station coordinates the pairing process, mediating between the UE's full-duplex capabilities and the interference constraints to identify suitable TRP pairs.
3Adaptability or versatility
If the UE measures multiple SSB beams from multiple TRPs, then TRP pairing opportunities increase, but measurement and processing overhead increases
Solution Approach 1:
The SSB beam measurements performed for traditional mobility purposes serve dual functions: they simultaneously provide information for both cell switching decisions and full-duplex TRP pairing opportunities. This multi-functional use of measurements eliminates redundant measurement overhead while enabling both mobility management and full-duplex optimization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may measure, while communicating with a serving transmit receive point (TRP) in a half-duplex communication mode, one or more synchronization signal block (SSB) beams associated with one or more neighbor TRPs. The UE may transmit, to a base station, a mobility report indicating at least one candidate TRP based at least in part on determining that an SSB beam transmitted by the at least one candidate TRP satisfies criteria to be paired in a full-duplex communication mode or a simultaneous half-duplex multi-TRP (mTRP) communication mode. Numerous other aspects are provided.