Dynamic Sub-Channel PPDU Alignment for Mixed Wi‑Fi Generations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication networks face challenges in efficiently utilizing frequency resources to support communication with devices of different generations, including legacy and newer generation wireless nodes, leading to inefficiencies and limitations in network performance.
Innovation Solution
The implementation of dynamic sub-channel operation (DSO) allows for the transmission of PPDUs with different formats on primary and secondary frequency bands using aligned symbol boundaries and condensed signaling, enabling multiplexing of legacy and newer generation devices by dynamically allocating resources outside the primary channel bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic sub-channel operation is implemented to multiplex legacy and newer generation devices, then network efficiency and resource utilization are improved, but device complexity and signaling requirements increase
Solution Approach 1:
The frequency band is segmented into a primary frequency band and a secondary frequency band. The primary band carries legacy-compatible signals while the secondary band carries enhanced signals for newer devices. This segmentation allows legacy and newer devices to operate independently on different frequency segments, improving network efficiency without forcing all devices to handle complex multi-band operations simultaneously.
Solution Approach 2:
Alignment information acts as an intermediary that bridges the primary and secondary frequency bands. This alignment information, transmitted in the legacy signal, enables newer devices to synchronize their symbol boundaries with the primary band without requiring complex inter-band coordination protocols. The intermediary alignment information simplifies the multiplexing process while maintaining compatibility with legacy devices.
2Quantity of substance
If secondary frequency band is used for newer generation devices, then frequency resource utilization is improved, but signaling overhead increases
Solution Approach 1:
The alignment information for the secondary frequency band is merged into the existing legacy signal structure rather than being transmitted as separate dedicated signaling. By embedding the alignment data in the legacy signal that all devices must process, the patent utilizes existing signaling overhead efficiently without adding separate signaling streams, thus improving frequency resource utilization while minimizing additional signaling overhead.
Solution Approach 2:
The legacy signal serves multiple functions: it maintains compatibility with legacy devices while simultaneously carrying alignment information for newer devices operating on the secondary frequency band. This multi-functionality allows the same signal to support both legacy and enhanced operations, improving frequency resource utilization without proportionally increasing signaling overhead.
3Productivity
If aligned symbol boundaries are used across primary and secondary bands, then multiplexing efficiency is improved, but synchronization complexity increases
Solution Approach 1:
The alignment information is prepared and embedded in the legacy signal in advance, before newer devices need to access the secondary frequency band. This preliminary encoding of alignment data allows receiving devices to synchronize their symbol boundaries without requiring complex real-time inter-band coordination, thus improving multiplexing efficiency while keeping synchronization complexity manageable through pre-computed alignment parameters.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for communication with dynamic sub-channel operation (DSO). Some aspects more specifically relate to aggregated physical layer protocol data units (PPDUs) of different PPDU formats. Some aspects more specifically relate to transmission of a first PPDU of a first PPDU format on the secondary frequency band and a second PPDU of a second PPDU format on the primary frequency band in the same time resource. For example, the first PPDU format may be an ultra-high reliability (UHR) format and the second PPDU format may be a high efficiency (HE) format. In some examples, to aggregate PPDUs in the same time resource on the primary and secondary frequency bands, the data symbol boundaries of the PPDUs may be aligned in time, and accordingly the preambles of the PPDUs may be designed to achieve alignment of the data symbol boundaries.