Multi-User PHY Preamble Resource Grouping
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Solution Overview
Problem
Current wireless local area networks (WLANs) face challenges in efficiently allocating resources for multi-user communication, particularly in supporting simultaneous data transmission to multiple client stations using orthogonal frequency division multiple access (OFDMA) technology, which affects data throughput and network performance.
Innovation Solution
The method involves generating a multi-user (MU) physical layer (PHY) data unit with a composite communication channel that spans multiple individual communication channels, each comprising basic resource allocation (RA) units. This includes formatting information in the PHY preamble to indicate groupings of basic RA units across multiple channels, allowing for efficient resource allocation and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resource allocation is performed within individual communication channels only, then channel-specific resource management is simplified, but resource utilization efficiency across the composite channel deteriorates
Solution Approach 1:
The patent segments the resource allocation process into two levels: intra-channel resource units (RUs) formed by grouping basic resource allocation units within each individual channel, and inter-channel resource groups formed by grouping multiple RUs across different channels. This hierarchical segmentation allows simplified per-channel management while achieving efficient cross-channel resource utilization through the coordination layer.
2Productivity
If multi-user transmission is supported across multiple channels, then data throughput is improved, but signaling complexity for resource allocation increases
Solution Approach 1:
The patent merges resource allocation signaling by introducing a resource group indicator that represents multiple resource units across different channels as a single allocable entity. This allows the access point to allocate resources to multiple users across the composite channel using unified signaling mechanisms, thereby supporting multi-user transmission and improving data throughput while controlling signaling complexity through consolidation.
3Adaptability or versatility
If basic RA units are grouped across multiple individual channels, then resource allocation flexibility is improved, but processing complexity at the communication device increases
Solution Approach 1:
The patent introduces a new dimension of resource organization by creating resource groups that span across multiple individual channels. This cross-channel grouping adds a hierarchical layer above the basic per-channel resource units, enabling flexible resource allocation across the composite channel while managing processing complexity through structured organization and standardized grouping rules.
Data Source
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AI summary
A physical layer (PHY) preamble of a multi-user (MU) PHY data unit is generated. The PHY preamble is generated to include formatting information regarding the MU PHY data unit, including a field to be transmitted within a first individual communication channel among a plurality of individual communication channels that collectively span a bandwidth of a composite channel, each individual communication channel including a plurality of basic resource allocation (RA) units that collectively span a bandwidth of the individual communication channel. The field is generated to indicate one or more groupings of basic RA units, wherein at least one of the one or more groupings of basic RA which includes basic RA units of one or more other individual communication channels. A data portion of the MU PHY data unit is generated according to the formatting information in the PHY preamble, and the MU PHY data unit is generated to include the PHY preamble and the data portion.