Extended Range SU Mode PPDU Transmission Bandwidth Allocation
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Solution Overview
Problem
In wireless local area networks (WLANs), the extended range single user (EXT SU) mode experiences poor data packet transmission reliability over long distances, where the preamble is often received correctly while the data part is not, due to a significant difference in coverage areas between preamble and data transmission.
Innovation Solution
The method involves generating an extended range mode physical layer protocol data unit (PPDU) with a legacy preamble transmitted using a 20 MHz bandwidth and a data part transmitted using a narrowband, specifically utilizing 26-tone, 52-tone, 106-tone, or 242-tone resource units (RUs), to improve data transmission reliability and balance performance in the EXT SU mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data part is transmitted using the same bandwidth as the preamble (20 MHz), then the transmission coverage area is large, but the transmission reliability of the data part is poor and bit error rates increase
Solution Approach 1:
The patent applies local quality by using different bandwidth allocations for different parts of the transmission. The preamble is transmitted using 20 MHz bandwidth while the data part is transmitted using narrowband (2.442 MHz or 5.88 MHz), optimizing each part's transmission characteristics for its specific requirements.
Solution Approach 2:
The patent changes the bandwidth parameter from 20 MHz for preamble to narrowband (2.442 MHz or 5.88 MHz) for data transmission. This parameter change improves transmission reliability by matching the bandwidth to the specific requirements of each transmission segment.
2Area of stationary object
If the data part is transmitted using wideband (20 MHz), then the transmission speed is high, but the coverage area is limited and long-distance transmission fails
Solution Approach 1:
The patent applies local quality by using different bandwidth allocations for different parts of the transmission. The preamble is transmitted using 20 MHz bandwidth while the data part is transmitted using narrowband (2.442 MHz or 5.88 MHz), optimizing each part's transmission characteristics for its specific requirements.
Solution Approach 2:
The patent changes the bandwidth parameter from 20 MHz for preamble to narrowband (2.442 MHz or 5.88 MHz) for data transmission. This parameter change improves transmission reliability by matching the bandwidth to the specific requirements of each transmission segment.
3Reliability
If the transmit power of data part is increased to match preamble performance, then the coverage area increases, but the power consumption increases and interference increases
Solution Approach 1:
The patent changes the bandwidth parameter from 20 MHz for preamble to narrowband (2.442 MHz or 5.88 MHz) for data transmission. This parameter change improves transmission reliability by matching the bandwidth to the specific requirements of each transmission segment.
Data Source
AI summary
Embodiments of the present invention provide an extended range SU mode physical layer protocol data unit PPDU transmission method and apparatus. The method includes: generating an extended range SU mode physical layer protocol data unit PPDU, where a legacy preamble part in the extended range SU mode PPDU is transmitted by using a bandwidth of 20 MHz, a data part in the extended range SU mode PPDU is transmitted by using a narrowband, and a bandwidth in the narrowband transmission includes at least one of the following parameters: a 26-tone RU, a 52-tone RU, a 106-tone RU, or a 242-tone RU. The embodiments of the present invention further provide a corresponding transmission apparatus. By applying the method and the apparatus in the embodiments of the present invention, transmission reliability of the data part may be improved, performance of parts in the PPDU in an EXT SU mode is more balanced, and a coverage area of long-distance transmission is ensured.