User Equipment Channel Estimation Configuration
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Solution Overview
Problem
In cellular wireless networks, managing distributed antenna systems with varying configurations poses challenges, particularly in accurately estimating radio communication channels due to geographical separation of antenna ports, leading to inefficiencies and performance degradation.
Innovation Solution
Providing control information regarding channel-state information (CSI) reference signals to user equipment (UE) allows for tailored configuration of channel estimation, selecting appropriate CSI reference signals based on antenna distributions and co-location information, thereby improving data throughput and avoiding assumptions about antenna port co-location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If distributed antenna systems are deployed with geographically separated antenna ports, then network coverage and capacity are improved, but channel estimation accuracy deteriorates due to arbitrary antenna port mappings
Solution Approach 1:
The patent changes the parameter of antenna port mapping from arbitrary to based on geographical co-location information. By modifying how antenna ports are mapped to physical antennas (using co-location awareness), the system maintains channel estimation accuracy while supporting distributed antenna deployments for improved network coverage.
2Device complexity
If arbitrary antenna port mappings are used in distributed antenna systems, then device complexity is reduced, but performance deteriorates due to inaccurate channel estimation
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with co-location information about antenna ports before data transmission occurs. This allows the UE to properly configure channel estimation parameters in advance, ensuring accurate channel estimation and high data throughput without increasing operational complexity.
3Measurement precision
If co-location information is provided to user equipment, then channel estimation accuracy is improved, but control information overhead increases
Solution Approach 1:
The patent makes the control information multi-functional by using co-location information to serve multiple purposes: it enables accurate channel estimation, supports distributed antenna configurations, and allows the UE to adapt its processing accordingly. This universal application of co-location information maximizes its utility while minimizing the need for separate control messages.
Data Source
AI summary
Examples are described relating to methods, apparatus and computer programs for configuring a user equipment in a cellular wireless network. Certain exemplary methods involve receiving (440), at the user equipment (430), control information regarding one or more of a plurality of channel-state information (CSI) reference signals. The plurality of CSI reference signals are receivable by the user equipment (430) from one or more of a plurality of antenna ports that form part of the cellular wireless network, the plurality of CSI reference signal being associated with corresponding antenna ports. The control information is for use in configuration of the user equipment (430) and is received over a radio communications downlink from a node (410) in the cellular wireless network. If estimation of one or more radio communication channels at the user equipment (430) is configured (450) based on the received control information, improvements in demodulation and CSI feedback are achieved.