OFDMA Tone Plan Segmentation for Wireless Network Congestion
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Solution Overview
Problem
Wireless communication networks face inefficiencies due to interference and congestion, particularly in scenarios with multiple devices sharing the same network, leading to suboptimal link usage and communication congestion.
Innovation Solution
Implementing optimized tone plans for orthogonal frequency-division multiple access (OFDMA) systems, which include specific allocations of tones for data, pilot, and direct current tones, allowing for efficient resource allocation and interference management across various bandwidths, such as 20, 40, and 80 MHz, using tone allocation units (TAUs) to improve communication efficiency and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices share the same wireless network, then network coverage and device connectivity are improved, but communication congestion and interference increase
Solution Approach 1:
The patent segments the wireless communication spectrum into multiple orthogonal frequency subcarriers (tones), allowing multiple devices to transmit simultaneously on different frequency resources. This segmentation enables efficient multi-user access while preventing interference through orthogonal frequency-division multiple access (OFDMA), directly resolving the contradiction between supporting multiple devices and maintaining communication efficiency.
Solution Approach 2:
The patent introduces frequency dimension allocation by assigning different tone sets to different devices and transmission types. By utilizing the frequency dimension for resource allocation, the system can accommodate multiple devices without temporal or spatial conflicts, thereby improving device connectivity while maintaining communication efficiency through dimensional resource expansion.
2Productivity
If tone allocations are optimized for different bandwidths, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent establishes a universal tone plan structure that functions across multiple bandwidth configurations (20 MHz, 40 MHz, 80 MHz, 160 MHz). The same fundamental tone allocation principles and mathematical relationships apply regardless of bandwidth size, allowing the system to maintain resource allocation efficiency while avoiding the need for entirely separate allocation schemes for each bandwidth, thus limiting complexity growth.
Solution Approach 2:
The patent adjusts tone allocation parameters (such as the number of subcarriers, guard tones, and pilot tones) based on bandwidth while maintaining consistent allocation rules. By changing parameters rather than restructuring the entire tone plan, the system achieves efficient resource allocation for different bandwidths without proportionally increasing system complexity.
3Reliability
If guard tones and direct current tones are allocated, then interference management is improved, but available data tones decrease
Solution Approach 1:
The patent applies different tone characteristics locally across the frequency spectrum: guard tones are placed at specific locations to provide interference protection, DC tones are positioned at the center frequency to handle offset issues, and data tones are allocated in the remaining regions. This localized quality assignment ensures reliable interference management while maximizing data transmission capacity in the available frequency regions.
Data Source
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AI summary
Methods and apparatuses for communicating over a wireless communication network are disclosed herein. One example apparatus includes a memory that stores instructions. The apparatus further includes a processor coupled with the memory. The processor and the memory are configured to determine a total bandwidth for a transmission of a message, the total bandwidth including a plurality of tones. The processor is further configured to divide the plurality of tones in the total bandwidth into one or more 26-, 52-, 106-, 242-, or 996-tone blocks. The processor is further configured to determine an indication. The indication assigns one or more of the one or more tone blocks to a first wireless communication device. The apparatus further includes a transmitter configured to transmit the indication to at least the first wireless communication device or a second device.