Dynamic MIMO Mode Switching for LTE Resource Optimization
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Solution Overview
Problem
MIMO activation in wireless communications networks leads to increased battery and resource consumption, as well as interference, especially when users are not utilizing high data speeds, necessitating optimization of resource consumption while maintaining user experience.
Innovation Solution
Implementing a dynamic and intelligent method to adjust the number of active antenna ports based on user data traffic and RF conditions, allowing for switching between different MIMO transmission modes, such as from a four-stream to a two-stream spatial multiplexing mode, based on throughput demands and channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO activation is used to achieve high data rates, then throughput is improved, but battery consumption and resource consumption increase
Solution Approach 1:
The patent applies dynamics by making the MIMO transmission mode adjustable rather than fixed. The system dynamically switches between different MIMO modes (e.g., 4-stream, 2-stream, 1-stream spatial multiplexing) based on real-time channel conditions and throughput demand evaluations, allowing the antenna configuration to adapt to varying traffic requirements and reduce energy consumption when high data rates are not needed
Solution Approach 2:
The patent changes the parameter of active antenna ports based on evaluated channel conditions and throughput demand. The system modifies the number of spatial streams (from 4 to 2 to 1) according to traffic payload size and RF signal quality indicators, thereby optimizing the balance between data rate achievement and energy/resource consumption
2Productivity
If MIMO activation is used to achieve high data rates, then throughput is improved, but interference to other mobile terminals increases
Solution Approach 1:
The system dynamically adjusts the number of active antenna ports based on evaluated channel conditions and throughput demand. When channel conditions are good and throughput demand is low, the system reduces the number of active streams, thereby reducing the signal power and minimizing interference to neighboring mobile terminals while maintaining adequate service quality
Solution Approach 2:
The patent modifies the transmission parameter of active antenna ports (from 4 to 2 to 1) based on traffic requirements and channel quality. This parameter change reduces the overall signal transmission power when high data rates are not required, thereby reducing harmful interference effects on other mobile terminals in the network
3Use of energy by moving object
If the number of active antenna ports is reduced to save resources, then energy consumption decreases, but data throughput capability is reduced
Solution Approach 1:
The system employs feedback mechanisms by continuously evaluating channel conditions (using indicators such as CQI, BLER, and RF signal quality) and throughput demand (based on buffer status reports). This feedback loop enables intelligent decision-making about when to reduce antenna ports for energy savings and when to increase them to meet throughput requirements, optimizing the trade-off between energy consumption and data capability
Solution Approach 2:
The patent makes the antenna configuration dynamic rather than static. The system can switch between different MIMO modes (4-stream, 2-stream, 1-stream spatial multiplexing) based on real-time evaluations of channel conditions and throughput demand, ensuring that energy is conserved when high performance is not needed while maintaining the capability to provide high throughput when required
Data Source
AI summary
The number of active antenna ports used for uplink and/or downlink MIMO transmissions to a given user are dynamically adjusted, based on user data traffic payload size per period of time, and based on RF conditions. An example method, in a radio transceiver that supports two or more MIMO transmission and reception modes, begins with evaluating channel conditions between the radio transceiver and a remote wireless device and comparing a throughput demand for the remote wireless device to a forward link capacity and/or reverse link capacity. A forward link transmission mode or a reverse link transmission mode is changed, based on the channel conditions and the throughput demand. The transmission mode is changed from a first multi-stream mode to a second multi-stream mode having fewer streams than the first multi-stream mode, despite that channel conditions for the corresponding link support the first multi-stream mode.