Control Channel Transmission via Non-Service Beam Resource Allocation
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Solution Overview
Problem
In LTE systems, the interference between control channels from different beams within the same or different network devices affects the reception performance of control channels, particularly due to overlapping coverage areas and stricter requirements on reception performance.
Innovation Solution
A method where a network device determines a second time-frequency resource from a control region of a non-service beam, which is used to assist the service beam in transmitting the control channel, thereby avoiding interference and enhancing reception performance. This involves configuring search spaces in both beams to align time-frequency resources, allowing the non-service beam to support the service beam's transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beamforming technology is used to guarantee coverage capability, then coverage capability is improved, but interference between different beams occurs
Solution Approach 1:
The control region is segmented into multiple search spaces, each associated with a specific beam. This allows the terminal to separately search for control channels in different search spaces corresponding to different beams, thereby avoiding interference between beams while maintaining coverage capability.
Solution Approach 2:
Different search spaces are configured with different local qualities (different time-frequency resources, different aggregation levels) according to the characteristics of each beam. The terminal device adapts its search strategy to each beam's local conditions, improving reception performance while reducing interference.
2Device complexity
If control channel is transmitted in first few symbols of each sub-frame, then control channel transmission is simplified, but reception performance is affected by interference
Solution Approach 1:
The control region is divided into multiple search spaces with different aggregation levels and time-frequency resource configurations. This segmentation allows the system to maintain simple transmission structure while improving reception performance through diversified search strategies that can avoid interference.
Solution Approach 2:
The terminal performs blind detection across multiple search spaces with different configurations, which is an excessive action compared to single search space detection. This partial redundancy provides multiple opportunities to successfully receive control channels, improving reliability without significantly increasing system complexity.
Data Source
AI summary
Disclosed are a control channel transmission method, a network device and a terminal device. The method comprises: a first network device receiving first information, which is sent by a second network device, comprising information for indicating a first time-frequency resource; the first network device determining a second time-frequency resource in a control region of a second beam, the second time-frequency resource comprising at least part of the first time-frequency resource; the first network device receiving second information sent by the second network device, the second information comprising a control channel; and the first network device sending, on the second time-frequency resource, the control channel to a terminal device via the second beam, wherein a first beam is a service beam of a first terminal device, and the second beam is a non-service beam potentially interfering with the service beam of the first terminal device.