IoT Wake-Up Receiver Selection for Coverage and Power Balance
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Solution Overview
Problem
The use of dual radio chains in IoT devices for power saving mode operation, such as a primary connection radio and a companion connection radio, affects transmission efficiency and coverage due to differences in receiving performance and coverage capabilities, leading to potential coverage holes and reduced communication quality.
Innovation Solution
A communication method where a terminal device sends indication information about the quantity of receive antennas to a network device, allowing the network device to adjust transmission parameters and switch between receivers based on energy saving or coverage requirements, thereby improving transmission efficiency and resolving coverage holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the wake-up receiver uses fewer receive antennas to reduce power consumption, then power consumption is reduced, but receiving performance and coverage capability deteriorate
Solution Approach 1:
The patent implements dynamic switching between wake-up receiver and main receiver based on signal conditions. The terminal device monitors reference signals and compares received power against thresholds to dynamically select which receiver handles wake-up signals, ensuring optimal performance while minimizing power consumption when possible
Solution Approach 2:
The patent changes the operational parameters of the receiver system by adjusting which receiver (wake-up or main) is active based on measured signal strength. The network device also adapts transmission parameters like power and repetition based on terminal device feedback about its receive antenna configuration
2Ease of manufacture
If the wake-up receiver uses fewer receive antennas to reduce cost, then device cost is reduced, but coverage capability deteriorates
Solution Approach 1:
The main receiver acts as an intermediary to compensate for the limited coverage capability of the wake-up receiver. When the wake-up receiver cannot reliably detect wake-up signals due to coverage limitations, the terminal device falls back to using the main receiver, which has full coverage capability, ensuring continuous operation
Solution Approach 2:
The system dynamically selects between wake-up receiver and main receiver based on real-time signal conditions, allowing the terminal to use the lower-cost wake-up receiver configuration when possible while maintaining full coverage capability through the main receiver when needed
3Productivity
If the terminal device reports receive antenna quantity information, then transmission efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent reports receive antenna quantity information as a configurable parameter that can be indicated through higher-layer signaling. The network device uses this parameter to adapt transmission parameters such as power, modulation, and coding, improving transmission efficiency while managing signaling overhead through structured reporting mechanisms
Data Source
AI summary
This application provides a communication method, an apparatus, and a system, and the communication method, the apparatus, and the system are applicable to the IoT field, so that transmission efficiency and communication quality can be improved. The method includes: A terminal device sends first indication information to a network device, where the first indication information indicates information about a quantity of receive antennas of a first receiver of the terminal device; and the terminal device receives, through the first receiver, a wake-up signal sent by the network device.