Distributed 26-Tone RU Mapping for 40 MHz WLAN Throughput
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Solution Overview
Problem
Existing WLAN systems face challenges in providing advanced wireless communication environments with improved throughput, reliability, and reduced latency, particularly in supporting low latency and ultra-high reliability for real-time traffic.
Innovation Solution
A method and device utilizing a distributed resource unit tone plan in a WLAN system, where a physical layer protocol data unit (PPDU) is mapped onto distributed resource units (DRUs) within a 40MHz channel, with 26-tone DRUs defined as every 18th subcarrier excluding DC, null, and guard subcarriers, enabling efficient transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional resource unit allocation is used in WLAN systems, then the system structure remains simple, but transmission rate and bandwidth utilization are insufficient for advanced wireless communication requirements
Solution Approach 1:
The patent segments the resource units into different types (first resource units and second resource units) with distinct allocation patterns. First resource units follow a first allocation pattern while second resource units follow a second allocation pattern, enabling differentiated resource management to improve transmission rate without overwhelming complexity
Solution Approach 2:
The patent applies different allocation patterns to different resource units within the same channel. By making the allocation pattern dependent on the specific resource unit characteristics and positions, the system optimizes local resource utilization while maintaining overall system manageability
2Area of stationary object
If distributed resource unit tone plan is implemented, then bandwidth and spatial stream utilization increase, but system complexity increases
Solution Approach 1:
The patent creates a universal tone plan configuration that can be applied across multiple resource units and channel bandwidths. The allocation patterns are designed to work generally for different scenarios, reducing the need for separate complex configurations for each case while maximizing bandwidth and spatial stream utilization
3Productivity
If resource allocation is optimized for throughput, then transmission efficiency improves, but latency for real-time traffic increases
Solution Approach 1:
The patent introduces dynamic resource allocation where the allocation pattern can be selected based on traffic characteristics. The system can adaptively choose between different allocation strategies to balance throughput optimization with latency requirements for real-time traffic, making the resource allocation dynamic rather than static
Data Source
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AI summary
A method and a device for transmission or reception based on a distributed resource unit tone plan in a wireless LAN system are disclosed. A method performed by a first station (STA) in a wireless local area network (WLAN) system according to an embodiment of the present disclosure may comprise the steps of: generating a physical layer protocol data unit (PPDU) including one or more fields, wherein the one or more fields are mapped onto one or more distributed resource units (DRUs); and transmitting the PPDU to one or more second STAs on a bandwidth including a 40 MHz channel. On the basis that the one or more DRUs include a 26-tone DRU, the 26-tone DRU may be one of 18 predefined 26-tone DRUs, and an nth (n=1, 2, ..., 18) 26-tone DRU may be defined as every 18th subcarrier including an nth lowest subcarrier among available subcarriers within a 20 MHz channel.