Precoding Region Segmentation for Control Channel Detection
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Solution Overview
Problem
Current communication systems face challenges in efficiently detecting control signals in mobile station devices, particularly in LTE-A networks, where complex processes can lead to incorrect identification of control information and limited control signal placement regions, affecting interference reduction and signal reception at cell edges.
Innovation Solution
A communication system with a base station device and mobile station devices that employ a precoding processor for common and different precoding processes on control channels and reference signals, allowing for efficient transmission and reception of control information through setting specific resource regions, using averaged propagation channel estimation for control channel detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mobile station device conducts a process of detecting a control signal on all reception signals in the PDSCH region, then control information detection capability is improved, but device complexity and process complexity increase
Solution Approach 1:
The PDSCH region is divided into multiple control signal candidate regions based on precoding process differences. Instead of detecting control signals across the entire PDSCH region, the mobile station device segments the detection process into specific regions where control signals with common precoding processes are located, thereby reducing detection complexity while maintaining detection capability.
Solution Approach 2:
Different regions within the PDSCH are assigned different properties based on precoding processes. Control signal candidate regions are identified where common precoding processes are applied, allowing the mobile station device to focus detection efforts on these specific local regions rather than uniformly scanning the entire PDSCH region.
2Device complexity
If control signal placement regions are limited, then device complexity is reduced, but control information transmission efficiency deteriorates
Solution Approach 1:
The base station device performs preliminary action by determining and indicating control signal candidate regions to mobile station devices before control signal transmission. This allows mobile station devices to pre-configure their detection processes for specific regions, reducing detection complexity while ensuring control information can be efficiently transmitted and received without unnecessary full-region scanning.
3Reliability
If different precoding processes are used in different regions, then signal reception quality is improved, but control signal detection complexity increases
Solution Approach 1:
The system segments the transmission region into multiple control signal candidate regions, each associated with specific precoding processes. This segmentation allows mobile station devices to manage precoding process differences by focusing on specific regions rather than handling all possible precoding variations across the entire bandwidth, thereby reducing detection complexity while maintaining reception quality.
Data Source
AI summary
Different precoding processes are used among different regions. A transmit processor uses resources in a region to transmit the control channel and the reference signal. A mobile station device includes a controller that sets a region on the basis of announced information from the base station device, a propagation channel estimator that averages propagation channel variation estimation values from a plurality of reference signals within the region, and a control channel detector that uses the averaged propagation channel estimation values to detect the control channel that includes control information addressed to the mobile station device.