Non-Contiguous Resource Unit Tone Spreading for Wi-Fi Diversity
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Solution Overview
Problem
Wireless communication systems, such as Wi-Fi networks, face inefficiencies in utilizing transmit power and suffer from limited frequency diversity due to contiguous resource unit (RU) configurations, leading to reduced reliability in message transmission.
Innovation Solution
Assigning non-contiguous sets of tones to RUs, allowing for improved frequency diversity and power utilization by spreading tones across a wider channel bandwidth, thereby mitigating narrow band interference and enabling concurrent data transmission from multiple nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contiguous resource units are allocated to wireless nodes, then the configuration is simple and easy to manage, but frequency diversity is limited and transmit power utilization is inefficient
Solution Approach 1:
The patent divides the channel bandwidth into multiple non-contiguous tone sets for a single RU allocation. Instead of allocating one contiguous block of tones, the RU is segmented into multiple separate tone groups scattered across the frequency spectrum, thereby improving frequency diversity while maintaining manageable configuration through standardized segmentation patterns.
Solution Approach 2:
The patent transitions from one-dimensional contiguous tone allocation to multi-dimensional non-contiguous tone distribution across the frequency spectrum. By spreading tones across multiple frequency segments rather than concentrating them in a single contiguous block, the system achieves better frequency diversity and power utilization without proportionally increasing configuration complexity.
2Use of energy by moving object
If contiguous resource units are used for data transmission, then the allocation method is straightforward, but narrow band interference has significant impact and power efficiency is reduced
Solution Approach 1:
The patent segments the RU tones into multiple non-contiguous groups distributed across the channel bandwidth. This segmentation allows transmit power to be efficiently utilized across wider frequency ranges while avoiding concentration in narrow bands that are susceptible to interference, thereby improving power efficiency without requiring complex custom allocation procedures.
Solution Approach 2:
The patent changes the frequency domain parameters of RU allocation from contiguous to non-contiguous tone distribution. By modifying the tone allocation pattern to spread tones across multiple frequency segments, the system improves resistance to narrow band interference and enhances power efficiency while maintaining standardized allocation mechanisms.
3Reliability
If non-contiguous tone sets are assigned to RUs, then frequency diversity and power efficiency are improved, but the configuration and management of RUs becomes more complex
Solution Approach 1:
The patent applies segmentation to divide RU tones into multiple non-contiguous groups, which improves message transmission reliability through frequency diversity. The segmentation follows standardized patterns that balance the reliability benefits with manageable configuration complexity, avoiding arbitrary complex allocations.
Solution Approach 2:
The patent introduces multi-dimensional tone distribution across the frequency spectrum for RU allocation. This dimensional change from contiguous to non-contiguous allocation enhances transmission reliability through frequency diversity while using standardized dimensional patterns that keep configuration and management complexity within acceptable bounds.
4Productivity
If contiguous RUs are allocated to multiple wireless nodes, then resource allocation is simple, but concurrent transmission reliability is limited due to limited frequency diversity
Solution Approach 1:
The patent segments RUs into non-contiguous tone sets that can be concurrently allocated to multiple wireless nodes. This segmentation enables each node to receive frequency-diverse tone allocations, improving concurrent transmission reliability while maintaining efficient resource utilization across the network.
Solution Approach 2:
The patent employs multi-dimensional non-contiguous tone allocation for concurrent RU assignments to multiple nodes. This approach enhances transmission reliability for simultaneous data transmissions by distributing tones across diverse frequency segments, while the standardized allocation patterns maintain manageable resource management complexity.
Data Source
AI summary
This disclosure provides methods, devices, and systems for wireless communications. In some systems, an access point (AP) may assign a resource unit (RU) including a non-contiguous set of tones of a channel to a wireless node, such as a station (STA). The non-contiguous set of tones includes at least some tones that are non-contiguous in the frequency domain with all other tones of the set. The AP may generate an indicator for this RU and may transmit the indicator to the wireless node. The wireless node may receive the indicator, determine the non-contiguous set of tones for the indicated RU, and transmit data over the non-contiguous set of tones for the RU. The AP may receive the data via the RU (over the non-contiguous set of tones).