6 GHz Long Range Beacon Using Duplicate PPDU Merging
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Solution Overview
Problem
The power spectral density limit in 6 GHz regulation restricts the transmit power of client devices, leading to reduced range for 6 GHz access points compared to co-located 2.4 or 5 GHz access points, especially for low power indoor APs, due to the current 20 MHz bandwidth of beacons.
Innovation Solution
Implementing a long range beacon system that allows beacons to be transmitted using non-high throughput (HT) duplicate physical layer protocol data units (PPDU) at 6 GHz, with a minimum bandwidth of 80 MHz, enabling STAs to combine duplicates and increase detection chances, and advertising this mode in beacons and probe responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If beacons are transmitted at 20 MHz bandwidth in 6 GHz band, then power spectral density limit is satisfied, but beacon transmission range is reduced
Solution Approach 1:
The patent combines multiple beacon transmissions (original beacon plus duplicated beacons) to achieve better detection range. By transmitting duplicate PPDU frames with beacon information at different time instances and combining them at the receiver, the effective signal strength is improved without violating power spectral density limits at any single transmission instance.
Solution Approach 2:
The patent implements periodic transmission of duplicate beacon frames at specified time intervals (e.g., every other beacon transmission). This periodic duplication allows receivers to accumulate signal energy over multiple transmissions, effectively extending the detection range while maintaining compliance with power limits during each individual transmission.
2Length of moving object
If transmit power is increased to extend 6 GHz AP range, then beacon detectability is improved, but power spectral density regulation is violated
Solution Approach 1:
The patent maintains continuous beacon transmission through duplication rather than intermittent high-power transmissions. By continuously sending duplicate beacons at regulated power levels and enabling receivers to combine them, the system achieves extended effective range while maintaining continuous compliance with power spectral density regulations throughout operation.
3Length of moving object
If beacon bandwidth is increased to improve range, then signal strength is improved, but power spectral density limit is exceeded
Solution Approach 1:
The patent merges multiple narrowband beacon transmissions rather than using a single wideband transmission. By duplicating beacons at 20 MHz bandwidth multiple times and combining them at the receiver, the effective detection range is extended without any single transmission exceeding the power spectral density limit that would occur with a wideband transmission.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to long range beacon. A device may determine one or more co-located frequency bands with a 6 GHz access point (AP). The device may generate a reduced neighbor report (RNR), wherein the RNR comprises information associated with the 6 GHz AP. The device may determine a minimum bandwidth to transmit a beacon frame using a communication mode. The device may cause to send the beacon frame to a first station device.