Wake-Up Packet Retransmission for Wireless Medium Reuse
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Solution Overview
Problem
Wireless local area networks (WLANs) face challenges in efficiently utilizing resources to provide bandwidth and response times, especially in environments with multiple devices, where some devices are limited by their communication protocols or hardware bandwidth, and need to operate with both new and legacy protocols.
Innovation Solution
The proposed solution involves a radio architecture that includes front-end module, radio IC, and baseband processing circuitry, enabling coexistence of WLAN and Bluetooth functionalities, with advanced wake-up packet transmission and acknowledgement procedures, including Low Power Wake-up Receiver (LP-WUR) and space time block coding, to optimize resource utilization and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device waits for an acknowledgment before reusing the wireless medium, then wake-up packet transmission reliability is improved, but network resource utilization deteriorates due to idle waiting time
Solution Approach 1:
The transmitting device performs preliminary actions by sending additional packets (data packets or retransmitted wake-up packets) during the acknowledgment waiting period. This preliminary utilization of the wireless medium before the official acknowledgment receipt improves resource productivity without compromising the reliability of the wake-up packet transmission, as the acknowledgment is still awaited properly.
2Adaptability or versatility
If multiple devices share the same wireless resources, then network versatility is improved, but resource efficiency deteriorates due to contention and limited bandwidth
Solution Approach 1:
The wake-up packet is designed with universal compatibility to work with both legacy devices and newer protocol devices. The packet structure and transmission method are adaptable to different protocol versions, allowing the same wireless resource to serve multiple device types simultaneously, thereby improving resource efficiency while maintaining protocol versatility.
Data Source
AI summary
Methods, devices, and systems for retransmission of wake-up signals from a first station to a second station over a wireless network are disclosed. In some aspects, a wake-up signal is encoded for transmission to the second station. While the first station is waiting for an acknowledgment of the wake-up signal from the second station, the second station may retransmit the wake up signal and/or encode a packet for transmission to a third station. In some aspects, whether the wake-up signal is retransmitted is based in part, on at least one of whether a number of timeout events for wake-up signals transmitted to the second station exceeds a maximum timeouts threshold, whether a number of wake-up signals transmitted to the second station exceeds a maximum wake-up signals threshold; or whether a maximum predetermined elapsed time since a first wake-up signal was transmitted to the second station is exceeded.