LTE Channel Coverage Enhancement by Channel-Specific Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently enhancing coverage for different channels, such as control and data channels, due to varying reliability and data rate requirements, which are not adequately addressed by existing repetition and power boosting techniques.
Innovation Solution
A base station selects different coverage enhancement techniques for different channels, such as repetition within or across subframes, power boosting, and spatial multiplexing, to optimize trade-offs for reliable and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetition techniques are applied to control channels, then coverage and reliability are improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments different channels (control channels vs. data channels) and applies different coverage enhancement techniques to each. Control channels use repetition techniques to ensure reliability, while data channels use spatial multiplexing to maintain high data rates, thus resolving the contradiction between reliability and transmission efficiency.
Solution Approach 2:
The patent applies different quality levels of coverage enhancement to different channels based on their specific requirements. Control channels receive enhanced reliability through repetition, while data channels prioritize speed through spatial multiplexing, allowing each channel to have optimized quality characteristics suited to its function.
2Length of moving object
If power boosting is applied to enhance coverage, then transmission range is improved, but energy consumption and interference increase
Solution Approach 1:
The patent segments the coverage enhancement approach by channel type, applying power boosting only where necessary for control channels while using spatial multiplexing for data channels. This selective application reduces overall energy consumption while maintaining adequate coverage range.
Solution Approach 2:
The patent changes the transmission parameters dynamically based on channel requirements and channel conditions. By adjusting whether to use power boosting or spatial multiplexing based on traffic type and channel state, the system optimizes the balance between coverage range and energy consumption.
Data Source
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AI summary
Methods, systems, and devices are described for coverage enhancement in a wireless communication system. A base station may select different coverage enhancement techniques for different channels, and transmit the channels using the selected coverage enhancement techniques. Examples of coverage enhancement techniques that may be selected include repetition within subframes, repetition across different subframes, power boosting, and spatial multiplexing. These and other techniques may be used alone or in combination. In some examples, a user equipment (UE) may determine a coverage enhancement need and may monitor a control channel accordingly.