Uplink Data Channel Power Control via Discontinuous TPC Commands
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Solution Overview
Problem
Current 5G radio access technologies face challenges in efficiently controlling transmission power of uplink data channels to meet the diverse requirements of different usage scenarios such as enhanced mobile broadband, massive machine-type communication, and ultra-reliable and low-latency communication, due to variations in data rates, latency, and reliability.
Innovation Solution
The implementation of a method and apparatus for controlling uplink data channel transmission power through the use of discontinuous transmission power control commands, allowing for dynamic adjustment of transmission power based on specific usage scenarios, enabling efficient multiplexing of radio resources across different numerologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If continuous transmission power control is used, then transmission power can be adjusted frequently, but power consumption increases and control complexity increases
Solution Approach 1:
The patent implements discontinuous transmission power control where the base station sends TPC commands at specific intervals (every 2nd, 4th, 8th, or 16th subframe) rather than continuously. This periodic action reduces the frequency of power adjustments and power consumption while maintaining effective transmission power control. The UE applies accumulated TPC commands at these periodic intervals to adjust its uplink transmission power.
2Loss of energy
If discontinuous transmission power control is used, then power consumption is reduced, but transmission power control precision deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the base station accumulates TPC commands and sends them periodically to the UE. The UE also maintains an accumulated TPC value and applies it to adjust transmission power. This feedback loop ensures that even with discontinuous control, the transmission power is accurately adjusted based on channel conditions and interference levels, maintaining control precision while reducing power consumption.
3Reliability
If transmission power is increased to meet diverse scenario requirements, then data transmission reliability improves, but power consumption increases
Solution Approach 1:
The patent implements dynamic transmission power adjustment where the UE's uplink transmission power is continuously adapted based on received TPC commands from the base station. This dynamic control allows the system to increase power only when and where needed to maintain reliability for different usage scenarios (eMBB, mMTC, URLLC), rather than maintaining high power continuously, thus improving reliability while managing power consumption efficiently.
Data Source
AI summary
Provided are methods and apparatuses for efficiently multiplexing one or more UL data transmission resource(s) between UEs with different latency requirements or efficiently controlling power of one or more UL data transmission resource(s) between UEs with different latency requirements, in the NR. The method of the UE for controlling transmission power of UP data channel may include applying predetermined power control, which is different from another, for transmitting an UL data channel and transmitting the UL data channel based on the applied predetermined power control.