MIMO Transmission Mode Selection for Energy Conservation
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Solution Overview
Problem
Multiple antenna systems in wireless communication face challenges in power conservation, particularly in mobile devices with limited battery life, as existing technologies do not effectively manage energy consumption to balance communication reliability and transfer rate.
Innovation Solution
A power-saving transmission method for multiple-input multiple-output (MIMO) systems that determines whether a MIMO transmission scheme consumes less energy than a single-input single-output (SISO) scheme, selecting a MIMO mode when available schemes meet energy-saving conditions, and switching between MIMO and SISO modes based on energy consumption and channel states to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO transmission scheme is used to improve communication reliability and transfer rate, then diversity gain and multiplexing gain are improved, but energy consumption increases
Solution Approach 1:
The patent dynamically switches between MIMO and SISO transmission modes based on real-time channel conditions and energy consumption thresholds. The system adapts its antenna configuration and transmission scheme according to varying environmental conditions, transitioning from static to dynamic operation to optimize both reliability and energy efficiency.
Solution Approach 2:
The patent changes key transmission parameters including the number of activated antennas, transmission power levels, and modulation schemes based on channel quality indicators. By adjusting these parameters dynamically, the system achieves optimal balance between communication reliability and energy consumption for different operating conditions.
2Productivity
If multiple antennas are activated to increase data transfer rate through multiplexing gain, then productivity is improved, but use of energy increases
Solution Approach 1:
The patent employs partial action by activating only the necessary number of antennas and transmission paths required to achieve the target data transfer rate, rather than always using all available antennas. This selective activation reduces energy consumption while maintaining sufficient productivity for the given channel conditions.
Solution Approach 2:
The system dynamically adjusts the number of active transmit and receive antennas based on channel quality and energy constraints, transitioning between different MIMO configurations (e.g., 2x2, 4x4) or falling back to SISO mode when energy is limited, thereby optimizing the productivity-energy tradeoff.
3Reliability
If MIMO transmission scheme is used to improve communication reliability through diversity gain, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the MIMO system into multiple independent transmission paths or layers, each handling specific data streams. This segmentation allows the system to achieve diversity gain through multiple paths while managing complexity by treating each path separately with simplified processing algorithms.
Solution Approach 2:
The patent designs the transmission system to be universal by implementing a framework that can operate in multiple modes (SISO, MIMO, partial MIMO) depending on conditions. This multi-functionality allows the same hardware to achieve reliability through diversity when needed while avoiding the complexity of full MIMO processing when conditions permit simpler operation.
Data Source
AI summary
A transmission method for a multiple antenna system including a first device having M (>1) transmitting antennas and a second device having N (>1) receiving antennas is disclosed. The method includes determining whether there is a multiple-input multiple-output (MIMO) transmission scheme satisfying a condition that it consumes less energy than a single-input single-output (SISO) transmission scheme to transmit a frame at a given transmission power, among one or more MIMO transmission schemes available to the first device and the second device, the one or more MIMO transmission schemes being determined by the numbers of activated transmitting and receiving antennas, and MIMO code; determining a transmission mode as a MIMO mode when there is the at least one MIMO transmission scheme satisfying the condition, and otherwise determining the transmission mode as a SISO mode; and performing frame transmission from the first device to the second device in the determined transmission mode. Thus, frame transmission with power saving can be performed.