LTE MIMO Transmit Path Optimization for Wireless Device Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for high-quality wireless service through multiple input multiple output (MIMO) transmissions leads to higher power consumption in wireless devices, causing faster battery drain, especially during high-order MIMO communications.
Innovation Solution
An access node dynamically adjusts the number of transmit paths based on reported wireless device transmit power and power headroom, reducing the number of paths when the transmit power is high and power headroom is low to lower power consumption and extend battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-order MIMO transmissions are used to increase data throughput and reliability, then transmission quality is improved, but wireless device power consumption increases and battery life decreases
Solution Approach 1:
The patent implements dynamic adjustment of MIMO transmission parameters (number of transmit paths, modulation and coding schemes) based on real-time channel conditions and device power status. The access node monitors device transmit power and power headroom, then adapts the transmission configuration accordingly, transitioning between high-order and low-order MIMO modes to balance reliability and power consumption
Solution Approach 2:
The patent changes key transmission parameters including the number of transmit paths, modulation order, and coding rate based on device power headroom and channel conditions. When power headroom is low, the system reduces transmit paths and adjusts modulation/coding parameters to decrease device power consumption while maintaining acceptable transmission reliability
2Productivity
If high-order MIMO transmissions are used to increase data throughput, then data throughput is improved, but wireless device power consumption increases and battery life decreases
Solution Approach 1:
The system dynamically adjusts MIMO transmission order based on real-time monitoring of device power headroom and channel conditions. When power headroom is sufficient, high-order MIMO is used to maximize throughput; when power headroom is low, the system transitions to lower-order MIMO to reduce power consumption, creating a dynamic balance between throughput and energy usage
Solution Approach 2:
The patent applies partial action by using only the necessary number of transmit paths required to achieve acceptable throughput given the device's current power state. Instead of always using maximum MIMO order, the system uses just enough transmit paths to maintain satisfactory data rates while conserving device power
3Reliability
If the number of transmit paths is increased to improve transmission quality, then transmission reliability is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent implements dynamic adjustment of the number of active transmit paths based on channel conditions and device power headroom. The access node monitors device status and adapts the MIMO configuration in real-time, reducing the number of transmit paths when device power headroom is low to decrease device complexity and power consumption while maintaining reliability through adaptive modulation and coding
Data Source
AI summary
A method of controlling a system for transmitting data. The method includes transmitting data using a plurality of transmit paths, receiving at the access node a transmit power and an available transmit power of a wireless device, monitoring at the access node the received transmit power and the received available transmit power over a period of time, determining at the access node the received transmit power meets a first criteria and the received available transmit power meets a second criteria, and reducing transmit paths from the access node in response to determining the received transmit power meets the first criteria and the received available transmit power meets the second criteria.