Multi-Carrier BWP Switching Using Advance DCI Indication
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Solution Overview
Problem
The inefficiency of bandwidth part (BWP) switching in multi-cell scheduling DCI formats for wireless communication systems, particularly in scenarios where BWP switching delays are prolonged due to cell scheduling complexities.
Innovation Solution
A method and apparatus for BWP switching that involves receiving and acting on first information indicating BWP switching for a first carrier, even if it does not schedule data transmission for a second carrier, thereby reducing delays by synchronizing BWP switching across multiple carriers based on DCI formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If BWP switching is performed based on multi-cell scheduling DCI format, then BWP switching can be applied across multiple carriers, but BWP switching delays are prolonged due to cell scheduling complexities
Solution Approach 1:
The patent applies preliminary action by performing BWP switching on the second carrier based on the first information before actual data transmission scheduling occurs. The terminal is triggered to switch BWP of the second carrier in advance, so that when subsequent cell scheduling needs to schedule the second carrier, the BWP switching is already completed, thereby reducing multiple BWP switching delays.
Solution Approach 2:
The patent segments the BWP switching process by separating it from the data transmission scheduling process. The first information is used specifically for BWP switching indication without being used to schedule data transmission of the second carrier, allowing BWP switching to be independently controlled and optimized for each carrier.
2Productivity
If first information is used to schedule data transmission of second carrier, then scheduling efficiency improves, but BWP switching control precision deteriorates
Solution Approach 1:
The patent segments the functions of the first information by specifying that it is used to indicate BWP switching of the first carrier but is not used to schedule data transmission of the second carrier. This separation allows precise control of BWP switching independently from data scheduling, maintaining control precision while still improving overall switching efficiency.
Solution Approach 2:
The first information serves multiple functions: it indicates BWP switching for the first carrier and simultaneously triggers BWP switching for the second carrier, even though it doesn't schedule data transmission on the second carrier. This multi-functionality improves switching efficiency without sacrificing precision through the segmented approach.
Data Source
AI summary
This application provides a bandwidth part switching method and an apparatus. The method includes: A network device sends first downlink control information DCI to a terminal, where a first indication field in the first DCI indicates a first cell, no bandwidth part BWP whose BWP identifier is a value of a BWP indicator field in the first DCI is configured in the first cell, and the first indication field indicates one or more cells for data transmission. The network device performs data transmission with the terminal on a first BWP, where the first BWP is one of BWPs configured in the first cell.