HE-STF Tone Plan for Mixed-Rate Wireless Networks
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Solution Overview
Problem
In wireless communication networks, the increasing volume and complexity of information transmitted leads to a significant overhead in bandwidth required for physical layer control signals, particularly in mixed-rate transmissions, necessitating improved power measurements and channel estimation accuracy to optimize resource usage.
Innovation Solution
The implementation of high-efficiency (HE) systems with advanced tone allocation schemes and training field structures, such as HE-STF tone plans with specific periodicities, enables efficient power measurement and channel estimation, allowing for backward-compatible multiple access communications across various wireless standards like IEEE 802.11ax.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the volume and complexity of information communicated wirelessly increases, then the information transmission capacity improves, but the overhead bandwidth required for physical layer control signals increases
Solution Approach 1:
The patent segments the training field into distinct tone allocations: legacy tones for backward compatibility and HE tones for high-efficiency transmissions. This segmentation allows different rate devices to utilize only their required tone portions, reducing the overhead bandwidth consumed by control signals while maintaining high information transmission capacity.
2Productivity
If multiple types of traffic are concurrently sent from an access point to multiple terminals, then the network throughput improves, but the number of bits required for physical layer control information increases
Solution Approach 1:
The patent creates a universal tone plan structure that serves multiple functions simultaneously: legacy tones maintain backward compatibility with older devices, while HE tones enable high-efficiency multi-user transmissions. This multi-functionality allows the system to support concurrent traffic types without proportionally increasing control information overhead.
3Adaptability or versatility
If backward compatibility is maintained for low-rate uplink communications, then legacy device support is preserved, but the efficiency of signaling and packet acquisition deteriorates
Solution Approach 1:
The patent applies local quality by assigning different tone characteristics to different device types within the same transmission. Legacy devices receive traditional tone allocations optimized for their requirements, while HE-capable devices receive enhanced tone allocations. This localized optimization maintains backward compatibility for legacy devices while achieving high efficiency for modern devices.
Data Source
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AI summary
A method of wirelessly communicating a packet can include generating, at a wireless device, a packet including a training field based on a training field tone plan. The method further includes populating training tones in the training field tone plan by duplicating tone positions from a base training field one or more times, and adding one or more additional sub-band direct current (DC) tones or edge tones. The method further includes transmitting the packet.