Uplink Repetition Power Control for Semi-Persistent Scheduling
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently and accurately transmitting and receiving uplink signals between terminals and base stations, particularly in reducing packet data latency for next-generation mobile communication systems like new radio access technology (RAT) and long-term evolution (LTE).
Innovation Solution
A method and apparatus for a user equipment (UE) to receive information on the number of times an uplink signal is to be repeated, determine transmission power based on this information, and adjust power control parameters accordingly to optimize the transmission of uplink signals, including physical uplink control channels (PUCCH) and physical uplink shared channels (PUSCH) using semi-persistent scheduling (SPS).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the uplink signal is repeatedly transmitted multiple times to improve reliability, then the transmission reliability is improved, but the power consumption increases and power efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making the transmission power adjustable based on the repetition count. The transmission power is determined dynamically according to the number of repetitions, allowing the system to adapt power levels to the specific transmission scenario rather than using a fixed power level for all repetitions.
Solution Approach 2:
The patent changes the transmission power parameter based on the repetition count. Different power control parameter sets are selected depending on whether the repetition count exceeds a threshold, directly modifying the power parameter to balance reliability improvement with power consumption control.
2Measurement precision
If the transmission power is increased to ensure accurate signal reception, then the signal reception accuracy is improved, but the power efficiency deteriorates
Solution Approach 1:
The patent modifies the transmission power parameter based on the repetition count. When the repetition count is high, lower power can be used since multiple transmissions provide redundancy. When repetitions are limited, higher power ensures adequate signal quality. This dynamic parameter adjustment optimizes the balance between reception accuracy and power efficiency.
Solution Approach 2:
The transmission power is made dynamic rather than static, adjusting according to the number of repetitions available. This allows the system to allocate power efficiently based on the specific transmission scenario.
3Use of energy by moving object
If different power control parameter sets are selected based on repetition count, then the power efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent segments the power control parameter space into multiple discrete sets based on repetition count thresholds. This segmentation allows the system to select from predefined parameter sets rather than calculating optimal parameters continuously, simplifying the control logic while maintaining power efficiency.
Solution Approach 2:
The patent manages complexity by organizing power control parameters into discrete, selectable sets rather than requiring continuous parameter optimization. The system selects appropriate parameter sets based on simple threshold comparisons of the repetition count.
Data Source
AI summary
A method for a terminal for transmitting a signal in a wireless communication system according to one embodiment of the present invention comprises: receiving repeated transmission related information comprising the count N by which an uplink signal transmission is to be repeated from a base station; determining the transmission power of the uplink signal; and transmitting repeatedly the uplink signal N times by the determined transmission power on the basis of the repeated transmission related information, wherein the terminal can determine the transmission power of the uplink signal on the basis of the count N by which the transmission of the uplink signal is to be repeated. The terminal is capable of communicating with at least one of another terminal, a terminal related to an autonomous driving vehicle, a base station or a network.