Wireless Tone Allocation for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication networks face inefficiencies due to device interference and congestion, particularly in scenarios where many devices share a network, leading to suboptimal link usage and communication congestion.
Innovation Solution
The implementation of a processing system that selects from various tone allocations, such as 20 MHz, 40 MHz, and 80 MHz bandwidths, to optimize message transmission by allocating specific numbers of data, pilot, guard, and leftover tones, thereby improving communication efficiency and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices share a wireless communication network, then network coverage and connectivity are improved, but communication congestion and interference increase
Solution Approach 1:
The patent segments the wireless communication channel into multiple orthogonal subcarriers (tones) that can be independently allocated to different devices. This segmentation allows multiple devices to communicate simultaneously without interference, resolving the contradiction between network coverage and communication efficiency by enabling concurrent transmissions across the same physical medium.
Solution Approach 2:
The patent introduces a frequency domain dimension by utilizing orthogonal frequency-division multiplexing (OFDM). Instead of sharing the same frequency channel, devices are allocated different frequency subcarriers, transforming the single-dimensional time-sharing problem into a multi-dimensional frequency-resource allocation problem, thereby improving both coverage and efficiency.
2Productivity
If tone allocations are optimized for different bandwidths, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic tone allocation where the number and distribution of tones are adjusted based on the selected bandwidth (20 MHz, 40 MHz, or 80 MHz). The system dynamically configures the allocation scheme according to channel conditions and traffic requirements, improving communication efficiency while managing complexity through adaptive rather than static configuration.
Solution Approach 2:
The patent changes key parameters (number of data tones, pilot tones, guard tones, and leftover tones) based on the selected bandwidth allocation. For example, a 20 MHz band uses different tone counts compared to 40 MHz or 80 MHz bands, allowing the system to optimize performance for each bandwidth scenario while maintaining a unified framework that manages complexity through parameterization.
3Quantity of substance
If more data tones are allocated, then transmission capacity is improved, but interference from adjacent channels increases
Solution Approach 1:
The patent extracts and isolates interference-prone frequency components by allocating specific guard tones at the edges of each bandwidth allocation (e.g., 11 edge guard tones for 20 MHz). These guard tones act as buffer zones that remove or isolate the harmful adjacent channel interference from the data-carrying tones, allowing maximum data tones to be allocated without suffering from edge interference.
Solution Approach 2:
The patent introduces pilot tones as intermediary elements between data tones and between different device allocations. These pilot tones serve as reference signals that mediate the relationship between transmitted and received signals, enabling accurate channel estimation and compensation for interference, thereby allowing higher data tone allocation while maintaining signal integrity.
Data Source
AI summary
Methods and apparatus for providing wireless messages according to various tone plans can include, for example, a method of wireless communication. The method includes selecting at least one of a 242-tone resource unit (RU), associated with a 256-tone plan including 234 data tones, 8 pilot tones, 3 direct current tones, and 11 edge tones, for transmission over a 20 MHz bandwidth, or a 484-tone RU, associated with a 512-tone plan including 468 data tones, 16 pilot tones, 5 direct current tones, and 23 edge tones, for transmission over a 40 MHz bandwidth. The method further includes providing a message for transmission according to the 256-tone plan or 512-tone plan.