Downlink Signal BWP Switching via Common Search Space DCI
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Solution Overview
Problem
The increasing number of UEs and data volume in wireless communication systems necessitates a method to efficiently utilize limited radio resources for data and control information transmission, while also addressing energy and power saving needs.
Innovation Solution
Implementing BWP switching based on DCI formats detected in a common search space, rather than a UE-specific search space, for efficient resource allocation and reduced control channel transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If BWP switching is implemented using DCI formats in a common search space, then control channel transmission is reduced and resource usage decreases, but the complexity of detecting DCI formats increases
Solution Approach 1:
The patent merges BWP switching indication with other downlink control information by transmitting both through the same DCI format in the common search space. This consolidation reduces the number of separate control messages needed, thereby reducing control channel transmission energy while managing detection complexity through unified processing
Solution Approach 2:
The DCI format is designed to serve multiple functions simultaneously: it provides both scheduling information and BWP switching indications. This multi-functionality allows the system to convey multiple types of control information through a single channel, reducing overall control channel usage and energy consumption
2Productivity
If the number of UEs and data volume increases, then communication capacity requirements increase, but available radio resources remain limited
Solution Approach 1:
The patent implements dynamic BWP switching that allows the system to adaptively allocate frequency resources based on current traffic conditions and UE requirements. By dynamically switching between different bandwidth parts, the system can efficiently accommodate varying data throughput demands of multiple UEs while optimizing the use of limited radio resources
Solution Approach 2:
The system changes operational parameters by switching between different BWP configurations, each with distinct bandwidth and frequency characteristics. This parameter change mechanism enables flexible resource allocation to handle increasing data volumes from multiple UEs without requiring additional physical radio resources
3Productivity
If BWP switching is performed based on DCI formats, then resource allocation efficiency improves, but the time required for BWP switching increases
Solution Approach 1:
The patent prepares multiple BWP configurations in advance and pre-configures the UE with these bandwidth parts. When switching is needed, the UE can quickly activate a pre-prepared BWP configuration rather than setting up a new one, thereby reducing switching time while maintaining efficient resource allocation through pre-optimized configurations
Data Source
AI summary
A UE may include: performing PDCCH monitoring; detecting a DCI format for a cell in which a first BWP is active; and performing BWP switching to change the active BWP of the cell from the first BWP to a second BWP on the basis of the DCI format including a switching-related indication. The DCI format including the switching-related indication may be detected only in a common search space rather than a search space specific to the UE.