Wi-Fi Spectrum Allocation Using Sub-Band Bitmaps for Multi-RU Support
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Solution Overview
Problem
Existing methods for allocating spectrum in wireless networks, particularly for next-generation Wi-Fi systems like IEEE 802.11be, are either overly complex or fail to support a wide range of RU size combinations, leading to inefficiencies in handling large bandwidths and diverse device types.
Innovation Solution
A method for allocating frequency spectrum using a bit representation that indicates the availability or unavailability of sub-bands, allowing for efficient encoding of single-user and multi-resource unit configurations, including both small and large RUs, through a simplified binary encoding scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RUs are allocated to support diverse device types and large bandwidths, then adaptability is improved, but device complexity increases due to the need to handle numerous RU size combinations
Solution Approach 1:
The frequency spectrum is segmented into multiple sub-bands, and the RU allocation is represented by indicating which sub-bands are available. This segmentation approach allows the system to support diverse RU configurations without requiring complex explicit allocation mechanisms for each possible RU size combination.
Solution Approach 2:
Instead of explicitly indicating which RUs are allocated to each station, the patent inverts the approach by indicating which sub-bands are available for allocation. This indirect representation simplifies the signaling complexity while maintaining the ability to support multiple RU configurations.
2Measurement precision
If explicit RU allocation information is provided for each station, then measurement precision is improved, but loss of information increases due to the large number of bits required in the header
Solution Approach 1:
The patent extracts the allocation information representation from explicit RU-by-RU indication and replaces it with a more compact sub-band availability indication. This extraction reduces the number of bits required in the header while preserving the essential allocation information through the inverted representation approach.
Solution Approach 2:
Instead of transmitting detailed RU allocation information for each station, the patent uses a compact copy representation where sub-band availability indicators serve as a simplified model from which the actual RU allocations can be derived, significantly reducing header overhead.
Data Source
AI summary
Methods, devices and systems for allocating spectrum in a wireless local area network. A bit representation of the availability or unavailability of a plurality of sub-bands of a portion of frequency spectrum is generated and included in a physical layer protocol data unit, which is transmitted to a target station to allocate resource units within the portion of frequency spectrum for use by the target station. The sub-bands may be 20 MHz spectrum sub-bands for large-size resource units, or the portion of frequency spectrum may be a single 20 MHZ band sub-divided into multiple sub-bands for allocating small-size resource units. A station that receives the data unit may decode the bit representation and use the allocated resource units to communicate over the wireless local area network.