Power Saving Signal Transmission via DMRS Positioning in 5G IoT
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently providing power saving signals, which is crucial for optimizing energy consumption and service delivery, especially in advanced 5G networks with diverse service requirements.
Innovation Solution
The method involves a terminal and base station configuration where a demodulation reference signal (DMRS) is used to determine a power saving-related parameter, allowing for the transmission and reception of control information within specific regions, thereby optimizing power usage and service efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power saving signals are transmitted frequently to ensure service delivery, then service reliability is improved, but terminal power consumption increases
Solution Approach 1:
The patent implements periodic wake-up signal transmission at configurable intervals (e.g., every 10ms, 20ms, or longer periods) instead of continuous transmission. The terminal enters sleep mode between periodic wake-up occasions, significantly reducing power consumption while maintaining service delivery capability through periodic channel assessments.
Solution Approach 2:
The patent configures wake-up signal parameters (period, offset, duration) in advance through RRC signaling before actual transmission begins. This preliminary configuration allows the terminal to prepare its reception schedule and enter sleep mode confidently, knowing when to wake up for potential service delivery without continuously monitoring the channel.
2Reliability
If the terminal continuously monitors control channels for power saving signals, then signal reception reliability is improved, but power consumption increases
Solution Approach 1:
The terminal monitors control channels periodically at wake-up occasions rather than continuously. Each wake-up occasion includes a configured duration for monitoring PDCCH candidates, followed by returning to sleep mode. This periodic monitoring maintains signal reception capability while dramatically reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The terminal performs partial monitoring by checking only specific search space sets and PDCCH candidates configured for wake-up signals, rather than monitoring all possible control channels. This selective partial monitoring reduces processing load and power consumption while maintaining reliability for power-saving related signaling.
3Difficulty of detecting and measuring
If wake-up signal monitoring is configured for all search spaces, then signal detection capability is improved, but device complexity increases
Solution Approach 1:
The patent applies different monitoring configurations to different search space sets. Specifically, wake-up signal monitoring is enabled only for designated search spaces (e.g., common search spaces for system information) while excluding UE-specific search spaces. This localized application of monitoring reduces complexity by focusing resources on critical power-saving signals rather than all control channels.
Solution Approach 2:
The monitoring configuration is segmented into multiple independent search space sets, each with its own wake-up signal monitoring parameters. This segmentation allows flexible configuration where only necessary search spaces require monitoring, reducing overall complexity while maintaining detection capability for power-saving signals in critical channels.
Data Source
AI summary
The present disclosure relates to: a communication technique for merging IoT technology with a 5G communication system for supporting higher data transmission rates than 4G systems; and a system therefor. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety related services, etc.) on the basis of 5G communication technology and IoT-related technologies. The present disclosure discloses a method and an apparatus for transmitting a power saving signal.