Narrowband UE Transmit Power Control via Feedback Ramping
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Solution Overview
Problem
Current narrowband wireless communication systems face challenges in efficiently managing transmit power, particularly in controlling uplink data transmission to minimize battery consumption and optimize communication in both connected and idle modes.
Innovation Solution
A method for user equipment (UE) in a narrowband wireless communication system that involves receiving a preconfigured uplink resource configuration from a base station, transmitting uplink data, and adjusting transmit power based on feedback information, including a ramping interval and specific offset values, to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit power is increased to ensure reliable data transmission, then communication reliability is improved, but battery consumption increases
Solution Approach 1:
The patent implements dynamic transmit power adjustment by introducing a power ramping mechanism where the UE increases its transmit power in steps (ramping) until feedback is received or maximum power is reached. This dynamic adjustment allows the system to use minimal power for successful transmissions while having the capability to increase power when needed, resolving the contradiction between reliability and energy consumption.
Solution Approach 2:
The patent employs feedback mechanisms where the base station sends acknowledgments (ACK/NACK) to the UE about received uplink data. This feedback loop enables the UE to adjust its transmit power based on actual transmission success, avoiding unnecessary high power usage when low power suffices while ensuring reliability when the channel conditions require it.
2Use of energy by moving object
If transmit power is decreased to minimize battery consumption, then energy efficiency is improved, but communication reliability deteriorates
Solution Approach 1:
The patent implements dynamic transmit power adjustment by introducing a power ramping mechanism where the UE increases its transmit power in steps (ramping) until feedback is received or maximum power is reached. This dynamic adjustment allows the system to use minimal power for successful transmissions while having the capability to increase power when needed, resolving the contradiction between reliability and energy consumption.
Solution Approach 2:
The patent applies preliminary action through preconfigured uplink resources and predetermined power ramping parameters. The UE is pre-configured with power adjustment rules and resource allocations, allowing it to efficiently manage power without complex real-time calculations, thus minimizing energy consumption while maintaining reliability through prepared contingency measures.
3Reliability
If the UE continuously monitors for feedback to ensure reliable communication, then communication reliability is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent implements periodic monitoring where the UE checks for feedback at specific intervals or after transmitting a certain number of packets. This periodic approach reduces the continuous monitoring burden and associated power consumption while still ensuring that feedback is received within acceptable timeframes, balancing reliability with reduced device complexity.
Solution Approach 2:
The patent applies partial action by limiting the number of feedback monitoring attempts or the duration of monitoring after transmission. The UE monitors for feedback but stops after a predetermined number of attempts or time period, avoiding excessive monitoring that would increase complexity and power consumption while still achieving sufficient reliability for most communication scenarios.
Data Source
AI summary
A method for controlling, by a user equipment (UE), a transmit power in a narrowband (NB) wireless communication system is disclosed. The method includes receiving, from a base station, a preconfigured uplink (UL) resource (PUR) configuration, transmitting, to the base station, uplink data on the PUR, and receiving, from the base station, feedback information for the uplink data. A transmit power of the uplink data is controlled based on a number of receptions of the feedback information.