Master TRP BWP Switching for Accurate Multi-TRP Control
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Solution Overview
Problem
In a 5G New Radio (NR) system, terminals cannot determine which transmitter receiver point (TRP) instructs bandwidth part (BWP) switching when multiple TRPs communicate with non-ideal backhaul, leading to inaccurate BWP switching and potential transmission errors.
Innovation Solution
A base station configures a master TRP and sends TRP configuration information to the terminal, allowing the terminal to determine the master TRP based on identifier or CORESET information, and then sends BWP switching information via the master TRP to instruct BWP switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs are configured for the terminal to increase spatial diversity gain, then communication reliability is improved, but the terminal cannot determine which TRP instructs BWP switching leading to switching errors
Solution Approach 1:
The patent introduces a master TRP as an intermediary that centrally manages BWP switching instructions. The master TRP acts as a mediator between the base station and terminal for BWP switching, while other TRPs focus on data transmission. This intermediary approach resolves the ambiguity of which TRP should instruct BWP switching, maintaining communication reliability through multiple TRPs while ensuring accurate BWP switching through centralized control via the master TRP.
2Reliability
If each TRP configures independent PDCCH resources for the terminal, then spatial diversity is improved, but BWP switching instructions from multiple TRPs cause confusion and switching errors
Solution Approach 1:
The patent segments the functions of multiple TRPs by designating one TRP as the master TRP responsible for BWP switching control, while other TRPs are assigned specific roles such as data transmission only. This functional segmentation resolves the control complexity issue by clearly defining which TRP handles BWP switching instructions, while maintaining spatial diversity through the continued operation of multiple TRPs with their independent PDCCH resources.
Data Source
AI summary
Provided are methods, apparatuses, and storage mediums for switching a bandwidth part (BWP). The method includes: sending, by a base station, transmitter receiver point (TRP) configuration information to a terminal; determining, by the terminal, a master TRP based on the TRP configuration information; sending, by the base station, BWP switching information to the terminal through the master TRP; switching, by the terminal, to a target BWP based on the BWP switching information.