Low Power Wake-Up Radio Frame BSSID Extraction
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Solution Overview
Problem
Existing wireless communication systems face high power consumption due to the inclusion of the basic service set identifier (BSSID) in wake-up radio frames, which increases the length and power requirements for transmission, especially when frames need to be transmitted outside the basic service set.
Innovation Solution
The system determines whether a wake-up radio frame is to be transmitted within or outside the basic service set and computes a target frame check sequence accordingly, either using or omitting the BSSID, and appends it to the frame, allowing for shorter frames and reduced power consumption by removing the BSSID when transmission is outside the set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BSSID is embedded within the WUR frame to identify the access point, then the connection maintenance between access point and low power device is ensured, but the WUR frame length increases and power consumption during transmission increases
Solution Approach 1:
The patent extracts the BSSID from the WUR frame structure, removing it as a separate embedded element. Instead, the BSSID is incorporated into the FCS computation process, allowing the frame to maintain identification functionality without carrying the BSSID as explicit data, thereby reducing frame length and transmission power consumption.
Solution Approach 2:
The FCS field is given a dual function: it continues to serve its traditional error detection role while simultaneously encoding the BSSID information through the computation process. This multi-functionality eliminates the need for a separate BSSID field, reducing overall frame length while maintaining access point identification capability.
2Loss of information
If the BSSID is embedded within the WUR frame, then the basic service set identification is achieved, but the WUR frame becomes longer and transmission power requirements increase
Solution Approach 1:
The BSSID is extracted from the frame body and integrated into the FCS computation. The receiver can determine the BSSID by computing the FCS with different candidate BSSID values until a match is found, eliminating the need for explicit BSSID embedding and reducing frame length.
Solution Approach 2:
The FCS computation process acts as an intermediary mechanism that indirectly conveys BSSID information. Rather than directly embedding the BSSID, the system uses the FCS calculation as a mediator to encode and transmit the identification information in a compact form.
3Reliability
If the BSSID is embedded within the WUR frame for transmission outside the basic service set, then the access point identification is maintained, but the power consumption and frame length increase
Solution Approach 1:
The BSSID is removed from explicit frame content and embedded within the FCS computation process. This extraction allows the frame to maintain access point identification capability for external transmissions without the overhead of carrying the BSSID as separate data, thereby reducing frame length and associated power consumption.
Data Source
AI summary
Embodiments described herein provide a method for creating a low power wake-up radio frame. The method comprises generating, at an access point, a wake-up radio frame for transmission to one or more client stations, determining whether the wake-up radio frame is to be transmitted inside or outside a basic service set associated with the access point, the basic service set having a basic service set identifier that is used to identify the access point. And in response to determining that the wake-up radio frame is to be transmitted outside the basic service set, computing, a target frame check sequence for the wake-up radio frame without using the basic service set identifier associated with the basic service set, appending the target frame check sequence to the wake-up radio frame; and transmitting, to one or more client stations, the wake-up radio frame with the appended target frame check sequence.