Adapting Power Control Dynamic Range for Shortened TTI Coverage
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Solution Overview
Problem
The introduction of shortened transmission time intervals (TTIs) in LTE networks can lead to a potential degradation of downlink coverage due to reduced transmission lengths, which existing systems struggle to compensate for.
Innovation Solution
A method and system for adapting the power control dynamic range in network nodes to optimize downlink coverage by configuring different power control schemes based on the length of TTIs, comparing TTIs with thresholds, and selecting appropriate power control dynamic ranges for transmitting signals to wireless devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If shortened TTI is used to reduce latency, then packet data latency is improved, but downlink coverage is degraded
Solution Approach 1:
The patent implements dynamic power control where the base station adjusts transmit power levels based on real-time TTI length conditions. When shortened TTI is detected, the system automatically increases power compensation to maintain coverage, creating a dynamic adaptation mechanism that responds to changing transmission conditions.
Solution Approach 2:
The system changes the power control parameter (transmit power level) in response to TTI length changes. By modifying the power parameter dynamically based on TTI duration, the system compensates for the coverage degradation caused by shorter transmission intervals while maintaining the latency reduction benefit.
2Productivity
If shortened TTI is used to reduce transmission time, then productivity is improved, but device complexity increases
Solution Approach 1:
The base station autonomously monitors TTI length and self-adjusts power control parameters without requiring complex external coordination or additional signaling overhead. The system serves itself by internally managing the power compensation mechanism, reducing the need for complex inter-device communication and control protocols.
3Device complexity
If traditional power control is used with shortened TTI, then device complexity is minimized, but downlink coverage is insufficient
Solution Approach 1:
The patent transforms static power control into a dynamic system that adapts to TTI length variations. The base station continuously monitors transmission interval duration and adjusts power levels accordingly, enabling traditional simple power control structures to achieve enhanced coverage performance through dynamic adaptation rather than complex architectural changes.
Data Source
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AI summary
A network node is provided. Processing circuitry of the network node is configured to configure a wireless device with a transmission time interval, TTI for use in operating a first physical channel. The physical channel includes a first reference radio resource. Determine the power control dynamic range scheme, the determination includes: if the TTI is greater than the threshold, selecting a first power control dynamic range for the first physical channel; and if the TTI is less than the threshold, selecting a second power control dynamic range for the first physical channel, the second power control dynamic range being different from the first power control dynamic range. A power for the first reference radio resource in the first power control dynamic range is the same as a power for the first reference radio resource in the second power control dynamic range.