WUR Discovery Frame for Low-Power WLAN Scanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless local area network (WLAN) devices face power consumption and performance issues due to scanning for nearby access points and location services, which can conflict with regular data exchange and introduce latency and power consumption.
Innovation Solution
A Wake-Up Radio (WUR) discovery frame is used to selectively transition the primary connectivity radio (PCR) from a lower-power mode to a higher-power mode, enabling efficient scanning and location services by providing channel information and identifiers, allowing for smart scanning and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If the primary connectivity radio (PCR) is used for scanning and location services, then discovery capability is improved, but power consumption increases
Solution Approach 1:
The radio system is segmented into two functional parts: a low-power Wake-Up Radio (WUR) for scanning and discovery, and a high-performance Primary Connectivity Radio (PCR) for data communication. The WUR operates independently to perform scanning tasks, allowing the PCR to remain in low-power mode and thus resolving the contradiction between discovery capability and power consumption.
Solution Approach 2:
The Wake-Up Radio acts as an intermediary between the low-power state and the full connectivity mode. It receives wake-up frames from access points, provides location service responses, and only activates the PCR when necessary, thereby enabling discovery functions without continuously consuming high power.
2Adaptability or versatility
If the primary connectivity radio (PCR) performs scanning on multiple channels, then roaming capability is improved, but latency and power consumption increase
Solution Approach 1:
Scanning functions are segregated to the Wake-Up Radio, which can rapidly tune through multiple channels and collect beacon information without the overhead and latency associated with PCR scanning. This segmentation enables efficient roaming capability while minimizing the time loss that would otherwise occur during channel scanning.
3Difficulty of detecting and measuring
If the primary connectivity radio (PCR) is activated for scanning, then network discovery is improved, but conflict with regular data exchange occurs
Solution Approach 1:
The system divides scanning and data exchange functions into separate radio systems. The Wake-Up Radio handles network discovery by listening for beacon frames and collecting access point information, while the Primary Connectivity Radio remains dedicated to data exchange. This eliminates conflicts between scanning activities and data transmission, as they occur on separate hardware platforms.
Solution Approach 2:
The Wake-Up Radio serves as an intermediary that performs network discovery tasks without interfering with the Primary Connectivity Radio's data exchange operations. It independently collects network information and only triggers the PCR when wake-up frames indicate incoming data, thus preventing conflicts between discovery and productivity functions.
Data Source
AI summary
An interface circuit in an electronic device (such as an access point) may provide a wake-up-radio (WUR) discovery frame for a recipient electronic device, where the WUR discovery frame includes an operating class of a wireless local area network (WLAN) associated with the electronic device. The operating class may specify a regulatory domain and a channel set of the WLAN. Moreover, the WUR discovery frame may include an index of a channel in the channel set. Furthermore, the WUR discovery frame may include a compressed or a partial identifier associated with the electronic device or the WLAN. The amount of compression may be based at least in part on a communication environment of the electronic device, such as a number of electronic devices, or a number of neighboring WLANs. Thus, the WUR discovery frame may have a variable size or length.