Wireless Search Space Configuration for Multi-Subframe DCI Detection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently setting a search space for detecting downlink control information, particularly in multi-subframe scenarios where overlapping search spaces and increased calculation complexity hinder effective DCI transmission.
Innovation Solution
A method where a user equipment (UE) monitors control channel candidates in a search space across multiple subframes, with indices set according to a predetermined rule, allowing for a larger resource region and differing search spaces for different subframes, enabling efficient detection of downlink control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If search spaces are set for multiple subframes in conventional wireless communication systems, then downlink control information can be transmitted across multiple subframes, but overlapping search spaces and increased calculation complexity occur
Solution Approach 1:
The patent divides the search space management into separate, independent configurations for each subframe. Each subframe has its own search space parameters (monitoring occasions, candidate numbers, aggregation levels) that can be independently set and managed, preventing overlap and reducing calculation complexity while maintaining multi-subframe scheduling capability.
2Adaptability or versatility
If search space indices are dynamically adjusted for multiple subframes, then flexibility in resource allocation is improved, but calculation complexity increases
Solution Approach 1:
The patent employs parameter changes by configuring search space indices through higher-layer signaling (RRC configuration) rather than dynamic calculation. The indices are set as predetermined parameters for each subframe, allowing flexible resource allocation while avoiding complex real-time calculations at the UE side.
3Quantity of substance
If a larger resource region is allocated for search spaces, then more control information can be accommodated, but the risk of overlapping search spaces increases
Solution Approach 1:
The patent applies local quality by assigning distinct search space configurations to different subframes, with each subframe having its own localized search space parameters. This includes different monitoring occasions, candidate indices, and aggregation levels for each subframe, ensuring that control information capacity is increased without causing overlap interference between subframes.
Data Source
AI summary
Disclosed in the present application is a method for user equipment receiving a control channel from a base station in a wireless communication system. More particularly, the method comprises a step of monitoring control channel candidates in a search area on a first subframe, and receiving the control channel including control information corresponding to each of one or more subframes, beginning with a predetermined number of subframes from the first subframe, wherein when the one or more subframes are provided in a plurality, the control channel candidates are sorted according to the control information corresponding to each of the plurality of subframes.