IoT Wake-Up Packets in HEW Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Internet of Things (IoT) devices in wireless local-area networks are battery-constrained and struggle to efficiently communicate, especially when operating on smaller sub-channels and needing to coexist with both newer and legacy protocols, which affects their power consumption and operational efficiency.
Innovation Solution
The implementation of a method using magic packets with a common wake-up PHY synchronization and station-specific dedicated wake-up preambles, transmitted on smaller sub-channels, allows IoT devices to efficiently wake up and communicate, reducing power consumption by extending their sleep state duration and enabling longer operation in low-power modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IoT devices operate continuously to maintain network connectivity and communicate data, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic wake-up schedules where IoT devices alternate between sleep mode and active communication mode. Devices wake up at predetermined intervals to transmit data or receive commands, then return to sleep mode. This periodic operation maintains communication reliability by ensuring regular network presence while dramatically reducing average power consumption compared to continuous operation.
Solution Approach 2:
The patent uses wake-up radio technology that continuously monitors for wake-up signals in a low-power state. When a wake-up signal is detected, the main processor is activated in advance of actual data communication needs. This preliminary activation allows the device to remain in ultra-low-power mode during idle periods while ensuring rapid response when communication is required, balancing reliability and power consumption.
2Productivity
If IoT devices use smaller sub-channels for communication, then spectral efficiency is improved, but device complexity increases due to protocol compatibility requirements
Solution Approach 1:
The patent divides the wireless spectrum into multiple sub-channels of different bandwidths (e.g., 1 MHz, 2 MHz, 5 MHz, 10 MHz, 20 MHz). IoT devices can be assigned to specific sub-channels based on their data rate requirements and power constraints. This segmentation allows efficient use of spectral resources while simplifying device design, as each device only needs to handle the specific sub-channel parameters assigned to it rather than supporting all possible configurations.
Solution Approach 2:
The patent implements a universal wake-up radio protocol that can operate across multiple sub-channel configurations and is compatible with both legacy and newer IEEE 802.11 protocols. This universal wake-up mechanism allows a single device design to support multiple sub-channel widths and protocol versions, reducing device complexity while maintaining spectral efficiency through flexible sub-channel allocation.
Data Source
AI summary
Apparatuses, computer readable media, and methods for waking up Internet of Things (IoT) devices in a high-efficiency wireless local-area network are disclosed. The apparatus of a high-efficiency wireless local-area network (HEW) device may include processing circuitry and transceiver circuitry configured to generate a packet for one or more stations comprising one or more sub-channels. Each sub-channel may include a common wake up physical synchronization in a physical layer and a station dedicated wake up preamble in a media access control (MAC) layer. The station dedicated wake up preamble may include a wake-up identifier for a corresponding station of the one or more stations. The processing circuitry and transceiver circuitry may be further configured to transmit the packet to the one or more stations in accordance with orthogonal frequency division multiple access (OFDMA).