Precoding Vector Selection for Heterogeneous Network Energy Efficiency
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Solution Overview
Problem
In heterogeneous networks, the existing methods for obtaining precoding vectors focus on achieving optimal spectrum efficiency, resulting in lower energy efficiency and higher energy requirements for base stations to transmit unit data.
Innovation Solution
A precoding method and apparatus that compare channel space transmitting powers with maximum transmitting powers of macro and micro base stations to determine the appropriate precoding vector, configuring the stations for either channel space or joint channel and zero space transmission based on these comparisons, thereby optimizing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If coordinated multi-point transmission precoding is calculated to achieve optimal spectrum efficiency, then spectrum efficiency is improved, but energy efficiency of base stations deteriorates and energy consumption increases
Solution Approach 1:
The patent applies dynamic selection between different precoding calculation methods (maximum ratio transmission, zero forcing, minimum mean square error) based on real-time channel conditions and base station capabilities. This allows the system to adaptively switch between spectrum efficiency optimization and energy efficiency optimization, resolving the contradiction by making the precoding approach dynamic rather than fixed
Solution Approach 2:
The patent changes key parameters including precoding matrix selection, power allocation coefficients, and transmission modes based on channel state information. By adjusting these parameters dynamically, the system can optimize for either spectrum efficiency or energy efficiency depending on current network conditions, thus resolving the contradiction between these two performance metrics
2Productivity
If coordinated multi-point transmission precoding is calculated to achieve optimal spectrum efficiency, then spectrum efficiency is improved, but energy consumption for transmitting unit data increases
Solution Approach 1:
The patent implements partial coordinated multi-point transmission where only necessary base stations participate in transmission based on channel conditions and user requirements. By selecting a subset of base stations rather than all available ones, the system achieves sufficient spectrum efficiency while reducing overall energy consumption for transmitting unit data
Solution Approach 2:
The patent dynamically adjusts power allocation parameters and precoding matrix selections to optimize the trade-off between spectrum efficiency and energy consumption. By changing transmission power levels and precoding configurations based on real-time conditions, the system minimizes energy necessary for transmitting unit data while maintaining acceptable spectrum efficiency
Data Source
AI summary
Embodiments of the present invention disclose a precoding method and an apparatus for heterogeneous network coordinated multi-point transmission. The method includes: obtaining parameter information of the heterogeneous network coordinated multi-point transmission system; comparing a first channel space transmitting power with the maximum transmitting power of a macro base station, and comparing a second channel space transmitting power with the maximum transmitting power of a micro base station according to the parameter information to obtain a comparison result; determining an obtaining manner of a precoding vector according to the comparison result, and obtaining a first precoding vector according to the obtaining manner of the precoding vector; and configuring the macro base station and the micro base station according to the first precoding vector. The embodiments of the present invention are applicable to a heterogeneous network coordinated multi-point transmission environment.