Wake-up Signal Frequency Encoding for Narrowband IoT
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Solution Overview
Problem
Narrowband wireless devices in wireless networks face power consumption and latency issues due to their inability to scan the entire available frequency band, leading to unnecessary energy expenditure while waiting for trigger frames or scanning for uplink access.
Innovation Solution
Encoding frequency information into wake-up signals allows target wireless devices to tune their main transceivers directly to the correct frequency for data exchange, eliminating the need to scan the entire frequency band and reducing power consumption and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If narrowband wireless devices scan the entire frequency band to find trigger frames or uplink access, then they can ensure reliable data reception, but power consumption increases and latency increases
Solution Approach 1:
The access point performs preliminary action by encoding frequency information in the wake-up signal before the target device needs to receive data. This allows the target device to directly tune to the correct frequency without scanning, resolving the contradiction between reliable data reception and power consumption.
2Reliability
If narrowband wireless devices scan the entire frequency band to find trigger frames or uplink access, then they can ensure reliable data reception, but latency increases
Solution Approach 1:
The access point provides frequency information in advance through the wake-up signal, allowing the target device to immediately tune to the correct frequency when data arrives, eliminating scanning latency while ensuring reliable reception.
3Device complexity
If wake-up signals do not include frequency information, then the signal format remains simple, but target devices must scan the entire frequency band increasing power consumption and latency
Solution Approach 1:
Frequency information is encoded in advance in the wake-up signal, allowing target devices to directly tune to the correct frequency without scanning. This adds minimal complexity to the signal format while dramatically reducing power consumption and latency.
4Use of energy by moving object
If wake-up signals include frequency information, then target devices can directly tune to the correct frequency reducing power consumption and latency, but the signal format becomes more complex
Solution Approach 1:
The access point encodes frequency information in the wake-up signal in advance, enabling target devices to directly tune to the correct frequency without scanning. This approach accepts minimal signal format complexity as a trade-off for significant reductions in power consumption and latency.
Data Source
AI summary
The application relates to a method for operating a first wireless device (100) in a wireless network. At least one target wireless device (200) is determined which should receive a wake up signal by which a wake up receiver of the at least one target wireless device is informed that a main transceiver of the target wireless device should be ready for receiving at least a first message from the first wireless device, Furthermore a frequency is determined at which the at least first message should be transmitted to the at least one target wireless device, and a frequency information is encoded into the wake up signal with which at least one target wireless device is informed about the frequency at which the at least first message will be received. The wake up signal is transmitted with the encoded frequency information to the at least one target wireless device.