Base Station Reference Signal Allocation for Distributed MIMO
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Solution Overview
Problem
Existing distributed Multiple-Input Multiple-Output (MIMO) cooperative transmission systems face challenges in efficiently measuring reception quality, particularly in systems with multiple distributed antennas, which leads to increased overhead and reduced radio resource efficiency.
Innovation Solution
A base station with communication and control circuitry that transmits or receives reference signals in multiple bands using a part of multiple antennas, and determines which bands to allocate to a terminal based on measurement results, thereby improving reception quality measurement efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reception quality measurement is performed in distributed MIMO cooperative transmission system, then interference reduction is achieved, but measurement overhead increases and radio resource efficiency decreases
Solution Approach 1:
The reference signal is designed to serve multiple functions simultaneously: it acts as both a channel estimation signal and a reception quality measurement signal. This multi-functionality allows the system to perform interference measurement without requiring separate dedicated measurement signals, thereby reducing overhead while maintaining reliable interference assessment for coordination purposes
2Adaptability or versatility
If reference signal is transmitted using multiple antennas in distributed MIMO, then channel coverage is improved, but resource consumption increases
Solution Approach 1:
The patent combines the reference signal transmission function with the reception quality measurement function into a single unified signal structure. By merging these functions, the system achieves comprehensive channel coverage across multiple distributed antennas while consuming fewer radio resources than would be required if separate signals were used for each function
Data Source
AI summary
A base station includes communication circuitry which, in operation, transmits or receives a reference signal in a plurality of bands using a part of a plurality of antennas, and control circuitry which, in operation, determines which of the plurality of bands to allocate to a terminal, based on a result of measurement using the reference signal.