Compressed Receiver Identity Signaling for Low-Power Wake-Up Detection
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Solution Overview
Problem
Existing communication systems face challenges in reducing power consumption and latency for devices with limited energy sources, such as IoT sensors and wearable devices, while maintaining low false alarm and missed detection probabilities in wake-up signal identification.
Innovation Solution
A transmitter and receiver device configuration that divides and interleaves identity bits using Galois fields and pseudo-random integers, selecting a subset of symbols for compressed identity transmission, utilizing error correction codes like Reed-Solomon codes to minimize resource usage and enhance identification accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the full identity is transmitted using conventional wake-up receiver methods, then identification reliability is maintained, but the number of transmitted symbols increases leading to higher power consumption and resource usage
Solution Approach 1:
The patent segments the full receiver identity into a compressed form by transmitting only a subset of K symbols (where N < K) from the complete set of K symbols representing the identity. This segmentation allows the wake-up receiver to identify the receiver using fewer transmitted symbols while maintaining sufficient identification reliability through the selected subset.
Solution Approach 2:
The patent changes the parameter of identity representation from the full K symbols to a compressed N symbols subset. By modifying the identity transmission parameter from complete identity to compressed identity, the system reduces the quantity of transmitted symbols while maintaining acceptable identification performance.
2Measurement precision
If error correction codes are applied to the identity transmission, then identification accuracy is improved, but the complexity of the transmission and reception processing increases
Solution Approach 1:
The patent employs a simple cyclic redundancy check (CRC) based error correction mechanism rather than complex error correction codes. This lightweight approach provides sufficient error detection and correction capability for wake-up signal identification while keeping the processing complexity low, suitable for resource-constrained wake-up receivers.
3Reliability
If the wake-up receiver monitors control channel continuously, then detection reliability is maintained, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the wake-up receiver monitors the control channel periodically rather than continuously. The receiver wakes up at specific intervals to check for wake-up signals and then enters sleep mode, reducing power consumption while maintaining detection reliability through periodic monitoring of the control channel.
Solution Approach 2:
The patent extracts the essential identification function from continuous monitoring by using a dedicated wake-up receiver that only monitors for the presence of wake-up signals during specific intervals. This extraction allows the main receiver to remain in low-power sleep mode while the wake-up receiver handles the critical detection task periodically.
Data Source
AI summary
A transmitter device and a receiver device are provided for signaling of a compressed identity of the receiver device in a communication system such as 3GPP new radio. The compressed identity is obtained from an identity of the receiver device by dividing a set of bits representing the ID into a first set of symbols comprising K number of symbols belonging to a Galois field, and mapping the first set of symbols based on an error correction code to obtain a second set of symbols belonging to the Galois field. Thereafter, the second set of symbols are interleaved based on a pseudo-random integer to obtain a set of interleaved symbols and a subset of interleaved symbols is selected among the set of interleaved symbols, the subset of interleaved symbols represents a compressed identity of the receiver device and comprises N number of symbols wherein N is less than K.