Multi-Carrier Bandwidth Part Switching via Single DCI Field
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving wireless signals, particularly in multi-carrier scheduling scenarios, where existing methods lack optimized bandwidth part switching mechanisms, leading to suboptimal resource allocation and increased DCI overhead.
Innovation Solution
The proposed method involves a user equipment (UE) and base station (BS) that perform bandwidth part switching operations based on pre-determined rules, including scheduling based on the lowest cell index or primary cell, using a single field for multi-carrier scheduling, and incorporating a 2-bit redundancy version field to indicate specific redundancy versions for carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single field is used for bandwidth part switching in multi-carrier scheduling, then DCI overhead is reduced, but the complexity of determining which carrier to switch increases
Solution Approach 1:
The patent applies parameter changes by using the cell index as a determining parameter to select which carrier performs bandwidth part switching. When multiple carriers are scheduled, the system changes the switching target from an arbitrary carrier to a specific carrier identified by its cell index, thereby resolving the ambiguity without requiring additional fields in DCI.
2Adaptability or versatility
If bandwidth part switching is performed on all scheduled carriers, then resource allocation flexibility is improved, but DCI overhead increases
Solution Approach 1:
The patent merges the bandwidth part switching indication into a single field within the DCI, rather than providing separate switching indications for each carrier. This combined approach maintains the ability to switch bandwidth parts on any scheduled carrier while significantly reducing the overall DCI overhead.
Solution Approach 2:
The system uses pre-configured cell index information and scheduling rules to automatically determine which carrier should perform bandwidth part switching, eliminating the need for explicit per-carrier switching commands and reducing DCI overhead while maintaining flexibility.
3Speed
If pre-determined rules are used for bandwidth part switching, then processing speed is improved, but adaptability to different scheduling scenarios decreases
Solution Approach 1:
The patent implements dynamic adaptability by allowing the bandwidth part switching rule to be selected based on the specific scheduling scenario. The system can dynamically choose between different determination methods (e.g., based on cell index, carrier index, or other criteria) depending on the scheduling context, thereby maintaining both speed and adaptability.
Data Source
AI summary
The present disclosure relates to a wireless communication system, and more particularly, to a method including: receiving DCI defined for multi-carrier scheduling, the DCI including: resource allocation information for one or more carriers, and a single field for bandwidth part switching; and performing a bandwidth part switching operation on one of multi-carriers, wherein, based on two or more carriers being scheduled by the DCI, the bandwidth part switching operation is performed on one of the multi-carriers based on a pre-determined rule, and wherein, based on one carrier being scheduled by the DCI, the bandwidth part switching operation is performed on the scheduled carrier of the multi-carriers.