Antenna Port Mapping for Network Devices
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Solution Overview
Problem
Current methods for mapping antenna ports to physical antennas in LTE systems are cumbersome and prone to errors, especially when dealing with different manufacturer devices, leading to suboptimal diversity gain and inefficient signal transmission.
Innovation Solution
A network device determines the polarization direction and antenna array for each physical antenna by measuring signal quality through variance analysis and correlation coefficients, allowing for accurate and efficient mapping of antenna ports to physical antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual mapping methods are used to map antenna ports to physical antennas, then the mapping can be performed with existing knowledge of RRU channel port connections, but the operations become cumbersome and error-prone when dealing with different manufacturer devices
Solution Approach 1:
The network device automatically determines polarization directions and performs antenna port mapping without manual intervention. The system measures signal qualities between antenna ports and physical antennas, calculates correlation coefficients, and autonomously completes the mapping process, eliminating the need for engineers to manually configure mappings for different manufacturer devices
Solution Approach 2:
The patent changes the approach from using fixed manufacturer-specific connection sequences to dynamically determining polarization directions through signal quality measurements. By measuring and comparing correlation coefficients under different polarization assumptions, the system adapts to any device configuration and automatically identifies the optimal mapping
2Measurement precision
If automated measurement methods are used to determine polarization directions, then the mapping accuracy improves, but the measurement process requires multiple signal quality measurements and calculations
Solution Approach 1:
The system measures signal qualities between antenna ports and physical antennas, calculates correlation coefficients for different polarization hypotheses, and uses this feedback to determine the correct polarization directions. The measurement results are fed back to validate the mapping configuration and ensure optimal diversity gain
Solution Approach 2:
The patent segments the four antenna ports into two groups based on polarization directions. By dividing the measurement and mapping process into distinct stages (measuring signal qualities, calculating correlations, determining polarizations, and final mapping), the complex process becomes more manageable and systematic
Data Source
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AI summary
An antenna port mapping method and a network device are disclosed. The method includes: determining, by a network device, a polarization direction of each of P physical antennas of the network device and an antenna array to which each of the P physical antennas belongs, where P is a multiple of 4; and respectively mapping, by the network device, a first antenna port and a second antenna port to a first group of physical antennas and a second group of physical antennas in the P physical antennas, and respectively mapping a third antenna port and a fourth antenna port to a third group of physical antennas and a fourth group of physical antennas in the P physical antennas.