WLAN Multi-Resource Unit Allocation With Zero-User Signaling
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Solution Overview
Problem
Existing wireless local area network (WLAN) systems face challenges in efficiently allocating multi-resource units (MRUs) to users, which affects spectrum efficiency and data transmission rates, particularly in densely populated areas and outdoor environments.
Innovation Solution
A method and apparatus for allocating MRUs in WLAN systems, involving the generation and transmission of RU allocation sub-fields to indicate zero users and unused sub-channels, allowing for efficient identification and utilization of pilot subcarriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional single-resource unit allocation is used in WLAN systems, then device complexity is reduced, but spectral efficiency and data transmission rates deteriorate
Solution Approach 1:
The patent segments the frequency spectrum into multiple resource units (RUs) of different sizes (26, 52, 106, 242 tones) that can be independently allocated to different users. This segmentation enables fine-grained spectrum allocation, improving spectral efficiency by utilizing previously wasted frequency resources while maintaining manageable complexity through standardized RU configurations.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by combining frequency-domain segmentation (multiple RUs) with user-domain mapping (multiple users per RU via MU-MIMO). This multi-dimensional allocation approach transforms traditional single-user single-RU allocation into a flexible framework supporting multiple users across multiple RUs, thereby enhancing spectral efficiency without proportionally increasing system complexity.
2Productivity
If multi-resource unit allocation is implemented, then data transmission rates are improved, but identification and measurement difficulty increases
Solution Approach 1:
The patent applies preliminary action by pre-defining standardized resource unit configurations (26, 52, 106, 242 tones) and their corresponding allocation patterns. These pre-established configurations are signaled to users through downlink control information, enabling users to identify and measure their allocated RUs without complex real-time calculations, thus facilitating high data transmission rates while reducing identification difficulty.
Solution Approach 2:
The patent introduces control information fields as intermediaries between the access point and stations. These control fields carry RU allocation indicators that map standardized RU configurations to specific frequency resources and users. This intermediary mechanism simplifies MRU identification by translating complex multi-RU allocations into recognizable patterns that stations can efficiently detect and measure.
3Loss of energy
If MRU allocation with zero user indication is implemented, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by allowing different sub-channels within an MRU to have different user allocation states. Specifically, certain sub-channels can be marked with zero user indication when not allocated to any user, while other sub-channels remain allocated. This localized differentiation enables precise spectral utilization by activating only the necessary sub-channels, improving spectral efficiency without requiring complete reconfiguration of the entire MRU structure.
Data Source
AI summary
Provided is a method of wireless communication by a first device, the method including allocating multi-resource unit (MRU) to at least one second device; generating at least one resource unit (RU) allocation sub-field respectively corresponding to at least one sub-channel included in the MRU; and transmitting the at least one RU allocation sub-field to the at least one second device. Generating the at least one RU allocation sub-field may include identifying a first RU including a first sub-channel to indicate a zero user in the MRU; and generating a first RU allocation sub-field corresponding to the first sub-channel based on the first RU.