OFDMA Tone Allocation via Subband Segmentation
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Solution Overview
Problem
Wireless communication networks face inefficiencies due to device interference and congestion, leading to suboptimal communication link usage, particularly in scenarios with multiple devices sharing a network.
Innovation Solution
A method and apparatus for allocating tones between wireless communication devices, which involves determining tone allocations by dividing tones into subbands and assigning a tone group size to each device, allowing for efficient orthogonal frequency division multiple access (OFDMA) messages by optimizing tone usage across devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices share a wireless communication network, then network coverage and device connectivity are improved, but interference and congestion increase leading to suboptimal communication link usage
Solution Approach 1:
The patent divides the frequency spectrum into multiple subbands and further segments tones within each subband. This segmentation allows multiple devices to operate simultaneously on different frequency resources, reducing interference while maintaining network coverage. The tone allocation mechanism assigns specific tone groups to different devices, enabling efficient multiplexing of communication links.
Solution Approach 2:
The patent introduces frequency domain dimensioning by organizing tones into subbands and tone groups. This dimensional organization of frequency resources allows the system to accommodate multiple devices by allocating them different combinations of subbands and tone groups, thereby improving communication link usage efficiency without increasing spatial interference.
2Productivity
If tones are allocated to multiple devices, then network throughput is improved, but interference between devices increases
Solution Approach 1:
The patent applies local quality by allowing different devices to have different tone allocation patterns tailored to their specific channel conditions and service requirements. Each device receives a customized allocation of tone groups within subbands, optimizing its communication quality while minimizing interference to others. This localized optimization enables higher overall network throughput.
Solution Approach 2:
The system dynamically changes allocation parameters including the number of subbands, tone group sizes, and tone indices assigned to each device. By adjusting these parameters based on channel conditions, traffic demands, and interference levels, the system maximizes network throughput while maintaining acceptable interference levels through adaptive resource management.
3Productivity
If tone allocation is optimized for specific devices, then communication efficiency for those devices is improved, but system complexity increases
Solution Approach 1:
The patent implements a universal tone allocation framework that can serve multiple devices with different requirements using the same underlying structure of subbands and tone groups. This multi-functional allocation mechanism handles various scenarios (single-device, multi-device, different traffic types) through a unified approach, managing complexity while maintaining communication efficiency across diverse device configurations.
Data Source
AI summary
Methods and apparatus for signaling tone allocations in OFDMA communication are disclosed herein. In one aspect, the method includes determining a tone allocation which divides a plurality of tones between a plurality of wireless communication devices, the tone allocation including at least one of determining a plurality of subbands, each subband comprising an exclusive contiguous subset of the plurality of tones, at least one subband of the plurality of subbands assigned to two or more devices of the plurality of wireless communication and assigning a tone group size to each wireless communication device of the plurality of wireless communication devices, wherein the tone group size indicates a number of contiguous tones that the wireless communication device is allocated, wherein at least one tone group size is larger than one. The method also includes transmitting the tone allocation to each of the plurality of wireless communication devices.