Multi-Cell BWP Switching with Combination DCI Signaling
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Solution Overview
Problem
Existing wireless communication systems, particularly in NR and LTE, face challenges in efficiently managing bandwidth part (BWP) switches across multiple cells, leading to inefficiencies in resource allocation and increased signaling overhead.
Innovation Solution
Implementing a combination downlink control information (DCI) that simultaneously manages BWP switches across multiple cells, using a single DCI to coordinate BWP changes and resource allocation in multiple cells, thereby reducing signaling overhead and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate DCI messages are used to manage BWP switches in each cell, then each cell can be independently controlled, but signaling overhead increases and resource allocation efficiency decreases
Solution Approach 1:
The patent combines multiple separate DCI messages into a single unified DCI message that simultaneously manages BWP switches across multiple cells. This merging approach reduces the quantity of signaling messages transmitted while maintaining the capability to independently control BWP switching in each cell, directly resolving the contradiction between independent control and signaling overhead.
Solution Approach 2:
The unified DCI message structure is designed to perform multiple functions simultaneously - it can indicate BWP switches for multiple different cells within a single message. This multi-functionality allows the system to maintain independent cell control capabilities while using a universal messaging format that reduces overall signaling overhead.
2Ease of operation
If multiple separate DCI messages are transmitted for BWP switching, then each cell's BWP can be switched independently, but resource allocation efficiency and system performance deteriorate
Solution Approach 1:
By merging multiple cell-specific DCI messages into a single unified DCI message, the system reduces the time and resources required for message transmission and processing. This combining approach maintains independent BWP switching capability for each cell while improving resource allocation efficiency by eliminating redundant signaling operations.
3Ease of operation
If individual DCI messages are used for each cell's BWP switch, then precise control is achieved, but signaling complexity increases
Solution Approach 1:
The patent merges multiple individual DCI messages into a single unified message structure that contains BWP switching information for multiple cells. This reduces signaling complexity by eliminating the need to process and manage multiple separate messages, while still enabling precise control of BWP switching in each individual cell through the unified message.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for efficient signaling of frequency resources in multiple cells. For example, a single downlink control information (DCI) transmission to a user equipment (UE) may be used to indicate a bandwidth part (BWP) switch to be applied in multiple cells. In some cases, the BWP switch may be into a pre-defined BWP across the multiple cells (and the same DCI may also schedule or trigger data or reference signals in the pre-defined BWP).