WLAN PPDU Tone Allocation for 2×OFDM Bandwidth Scaling
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Solution Overview
Problem
Existing wireless LAN systems face challenges in improving transmission rates, reliability, and reducing latency, particularly in supporting high-throughput and ultra-high reliability scenarios, with a need for efficient tone allocation in new numerologies.
Innovation Solution
A method and device for transmitting and receiving physical layer protocol data units (PPDUs) with varying numbers of subcarriers based on tone allocation, including 512 for 20 MHz, 1024 for 40 MHz, 2048 for 80 MHz, and 4096 for 160 MHz PPDUs, to enhance wireless communication in WLAN systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If new numerology with 2×OFDM is introduced to improve transmission rates and reduce latency, then productivity and speed are improved, but device complexity increases due to varying subcarrier allocations across different bandwidths
Solution Approach 1:
The patent applies parameter changes by introducing a new numerology with doubled subcarrier spacing (2×OFDM) and systematically scaling the number of subcarriers according to bandwidth (512 for 20 MHz, 1024 for 40 MHz, 2048 for 80 MHz, 4096 for 160 MHz, 8192 for 320 MHz). This standardized parameter scaling approach improves transmission rates while managing device complexity through consistent mathematical relationships rather than ad-hoc configurations.
2Reliability
If tone allocation is optimized for new numerology to enhance reliability and reduce errors, then reliability is improved, but ease of operation deteriorates due to complex PPDU generation and reception procedures
Solution Approach 1:
The patent establishes standardized parameter relationships where the number of subcarriers is directly determined by bandwidth (512, 1024, 2048, 4096, or 8192 subcarriers for 20, 40, 80, 160, or 320 MHz respectively). This systematic parameterization improves reliability through consistent tone allocation while simplifying operation by providing clear, deterministic rules for PPDU generation and reception across different bandwidth configurations.
Data Source
AI summary
Disclosed are a method and device for transmission and reception based on tone allocation for a new numerology in a wireless LAN system. A method performed by a first station (STA) in a wireless LAN system according to an embodiment disclosed herein comprises the steps of: generating a physical layer protocol data unit (PPDU) including information transferred through at least one of data subcarriers or pilot subcarriers; and transmitting the generated PPDU to one or more second STAs, wherein the total number of subcarriers may be 512 on the basis that the PPDU is a 20 MHz PPDU, the total number of subcarriers may be 1024 on the basis that the PPDU is a 40 MHz PPDU, and the total number of subcarriers may be 2048 on the basis that the PPDU is a 80 MHz PPDU.