Wireless LAN Multilayer Transmission Under RU/MRU Allocation Rules
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Solution Overview
Problem
The existing wireless LAN systems face challenges in performing multi-layer-based transmission and reception, particularly under resource unit (RU) and multi-resource unit (MRU) allocation restrictions, and in supporting multi-layer-based relay transmission.
Innovation Solution
A method and device for performing multi-layer-based transmission and reception in a wireless LAN system, involving the exchange of physical protocol data units (PPDUs) with user fields containing information on multi-layer transmission and resource unit allocation, enabling efficient operation under restriction rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-layer transmission is implemented in wireless LAN systems, then transmission efficiency and data rate are improved, but device complexity and protocol overhead increase
Solution Approach 1:
The patent segments the transmission process into distinct layers (first layer with first PSDU on first RU, second layer with second PSDU on second RU) within a single PPDU structure. This segmentation allows independent processing and decoding of each layer while maintaining overall transmission efficiency, resolving the contradiction by organizing complexity into manageable segments.
Solution Approach 2:
The patent introduces a multi-layer dimension to the traditional single-layer transmission model by allocating multiple resource units (RUs) to different layers. This dimensional expansion enables parallel data transmission across layers, improving productivity while the structured layering approach manages the resulting complexity through systematic organization.
2Reliability
If resource unit (RU)/multi-resource unit (MRU) allocation is restricted for multi-layer transmission, then system reliability is improved, but transmission flexibility deteriorates
Solution Approach 1:
The patent implements dynamic RU/MRU allocation within defined restriction rules, allowing the system to adaptively assign resource units to different layers based on channel conditions and traffic requirements. The restriction rules provide a framework for reliability while the dynamic allocation mechanism within that framework maintains transmission flexibility.
Solution Approach 2:
The patent changes the parameter of resource unit allocation by introducing multi-resource unit (MRU) concepts and layered allocation schemes. This allows the system to maintain reliability through structured allocation rules while achieving flexibility through variable RU assignments across different layers and users, resolving the contradiction between reliability and adaptability.
3Productivity
If multi-layer-based relay transmission is supported, then network coverage and connectivity are improved, but protocol complexity and processing overhead increase
Solution Approach 1:
The patent introduces relay stations as intermediaries in the multi-layer transmission architecture. These relays receive PPDUs from source stations, process the multi-layer structure according to defined protocols, and forward to destination stations. This intermediary approach extends network coverage while the standardized relay processing protocols manage the complexity through systematic mediation.
Solution Approach 2:
The patent segments the relay transmission process into distinct functional layers, where each layer handles specific processing tasks. This segmentation allows relay stations to process only the necessary layer information rather than handling complete protocol stacks, reducing processing overhead while maintaining extended network coverage through the multi-layer relay architecture.
Data Source
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AI summary
A method and a device operating in a wireless LAN system are disclosed. A method performed by a first STA in a wireless LAN system according to an embodiment of the present disclosure may comprise the steps of: receiving a first physical protocol data unit (PPDU) including a user field of an ultra-high reliability (UHR)-signal (SIG) field from a second STA; and decoding, on the basis of the user field, a first physical layer service unit (physical service data unit (PSDU)) allocated to a first resource unit (RU) among multiple resource units (MRUs) and a second PSDU allocated to a second RU among the MRUs, wherein the user field includes i) first information indicating whether multilayer transmission is applied to the first PPDU, and ii) second information related to each of the first PSDU and the second PSDU.