Dynamic MIMO Reception Branch Control for Power Reduction
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Solution Overview
Problem
MIMO transmission schemes increase power consumption in wireless communication devices due to the need for multiple reception branches, especially during packet detection and standby modes, which affects battery life in portable devices and energy efficiency in stationary devices.
Innovation Solution
A wireless communication apparatus that dynamically enables and disables reception branches based on the reception operation state, using only the necessary number of branches for packet detection and data reception, reducing power consumption by transitioning to a standby state when not needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple reception branches are used for MIMO communication, then transmission capacity and communication speed are improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the reception branch configuration adjustable rather than fixed. The controller dynamically enables or disables reception branches based on communication conditions, allowing the system to adapt between high-performance mode (multiple branches enabled) and low-power mode (fewer branches enabled), thus resolving the contradiction between transmission capacity and power consumption
Solution Approach 2:
The patent changes the operational parameter of the reception branches by transitioning between enabled and disabled states. By controlling the number of active reception branches according to communication requirements, the system can adjust its power consumption level while maintaining necessary transmission capacity, effectively managing the trade-off between performance and energy usage
2Reliability
If multiple reception branches operate during packet detection standby, then detection reliability is improved, but power consumption during standby increases
Solution Approach 1:
The patent applies partial action by enabling only the necessary number of reception branches for packet detection during standby mode rather than keeping all branches active. This allows the system to maintain sufficient detection reliability with minimal power consumption, avoiding the excessive power usage that would result from keeping all reception branches operational during standby
3Measurement precision
If all reception branches are enabled for MIMO signal reception, then reception quality is improved, but device size and weight increase
Solution Approach 1:
The patent makes the reception branch configuration dynamic, enabling the system to adjust the number of active reception branches based on actual communication needs. This allows the device to achieve high reception quality when necessary while reducing its physical footprint and weight during normal operation, effectively resolving the contradiction between reception quality and device weight
Data Source
AI summary
Disclosed are a wireless communication apparatus, a wireless communication method, and a computer program for intercommunication between a plurality of wireless stations. In a reception standby state, packet detection is performed by using a part of the plurality of reception branches to disable the reception operation of the remaining reception branches that do not perform packet detection, and thereby reducing the power consumption during packet detection standby. Further, in a packet reception state, only the minimum necessary number of reception branches for receiving signal that is spatially multiplexed is enabled by MIMO transmission, and thereby reducing the power consumption also during reception of MIMO signals.