Distributed Antenna System Control Information Reception
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Solution Overview
Problem
In distributed antenna systems (DAS), there is a need for efficient communication methods that allow base stations to transmit control information to user equipment, allocate antenna resources, and perform channel estimation, as existing systems face challenges in optimizing antenna usage and signal transmission efficiency.
Innovation Solution
A method where user equipment receives control information from a base station to identify effective transmitting antennas, generates feedback information, and maps pilot pattern indexes to logical antenna indexes for efficient channel estimation and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If distributed antennas are deployed throughout the cell, then coverage extension and shadow region elimination are improved, but system complexity and signal management difficulty increase
Solution Approach 1:
The patent segments the cell into multiple DAS zones, each served by a separate antenna group. This segmentation allows independent management of each zone while maintaining overall system coordination, reducing the complexity of managing all antennas centrally.
Solution Approach 2:
The patent introduces a spatial dimension to signal transmission by distributing antennas throughout the cell rather than concentrating them at a single location. This dimensional change enables coverage extension into shadow regions while managing complexity through distributed architecture.
2Productivity
If multiple antennas transmit different data streams simultaneously, then transmission capacity and power efficiency are improved, but interference management and signal coordination become more difficult
Solution Approach 1:
The patent applies local quality by allocating specific antenna groups to specific DAS zones based on user equipment location and channel conditions. Each antenna group is optimized for its local zone, improving transmission capacity while reducing coordination complexity through localized management.
Solution Approach 2:
The patent implements dynamic antenna group allocation where the base station can reconfigure which antennas serve which DAS zones based on real-time channel conditions and traffic demands. This dynamic adaptation improves capacity while managing complexity through flexible, condition-based resource allocation.
3Reliability
If wired connections are used between base station and distributed antennas, then signal loss and inter-antenna interference are reduced, but installation complexity and maintenance costs increase
Solution Approach 1:
The patent uses a DAS zone controller as an intermediary between the base station and distributed antennas. This intermediary manages the wired connections locally within each DAS zone, improving signal quality through dedicated connections while reducing overall installation complexity by distributing the connection management across multiple localized controllers.
Data Source
AI summary
The present invention relates to a terminal which receives signals from a base station, and to a method in which the terminal receives signals from the base station in a distributed antenna system (DAS). The terminal receives, from the base station having a plurality of antennas, control information on one or more active transmission antennas allocated to the terminal, from among the plurality of antennas, and receives signals from the base station via said one or more active transmission antennas.