MIMO Mode Selection Using Coherence Block Thresholds
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Solution Overview
Problem
Mobile network operators face challenges in efficiently managing limited wireless frequency spectrum, particularly in scenarios where spectrum is scarce, leading to difficulties in providing adequate coverage and capacity for growing user bases without overloading the network.
Innovation Solution
The implementation of a network system utilizing multi-user multiple-input multiple-output (MIMO) technology with aggregated modular adaptive antenna arrays, which leverages lower frequency bands for improved uplink signaling and spectral efficiency, allowing for the 'slicing' of available spectrum to serve specific users and optimizing channel usage through advanced semiconductor technologies and beamforming techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional spectrum allocation methods are used, then network coverage can be maintained, but spectral efficiency is insufficient to serve growing user bases
Solution Approach 1:
The patent changes the parameter of frequency band selection by utilizing lower frequency bands (e.g., sub-6 GHz) that offer better propagation characteristics and uplink signaling performance. This parameter change enables improved spectral efficiency without requiring additional spectrum allocation, directly addressing the contradiction between limited spectrum quantity and the need for higher productivity.
Solution Approach 2:
The patent segments the available spectrum into different frequency bands and allocates specific bands for uplink and downlink communications. By dividing the spectrum into manageable segments and optimizing each segment's usage through MIMO techniques, the system achieves higher overall spectral efficiency from the limited available spectrum resources.
2Productivity
If more spectrum is acquired to serve growing users, then network capacity increases, but infrastructure costs and complexity increase
Solution Approach 1:
The patent implements MIMO technology that allows existing antenna structures to serve multiple functions simultaneously - supporting both traditional communications and enhanced spectral efficiency requirements. This multi-functionality enables increased network capacity without proportionally increasing infrastructure complexity, as the same physical infrastructure handles multiple communication tasks.
Solution Approach 2:
The patent changes operational parameters such as modulation schemes, coding rates, and MIMO configurations to optimize network capacity within existing infrastructure constraints. By adjusting these parameters dynamically based on channel conditions and user demands, the system achieves higher capacity without requiring additional physical infrastructure.
3Quantity of substance
If higher frequency bands are used, then spectrum availability increases, but uplink signaling performance deteriorates
Solution Approach 1:
The patent changes the frequency band parameter to utilize lower frequency ranges (e.g., 600 MHz to 3.5 GHz) for uplink communications where propagation characteristics and signaling performance are superior. This parameter optimization ensures reliable uplink signaling while still providing adequate spectrum availability through efficient MIMO utilization in these lower bands.
Data Source
AI summary
Identifying a coherence time associated with a user equipment (UE) and a coherence bandwidth associated with the UE, determining a coherence block based on the coherence time and the coherence bandwidth, determining whether the coherence block satisfies a threshold, based on a first determination that the coherence block satisfies the threshold, employing a plurality of modular antenna arrays in multi-user (Mu)-multiple-input-multiple-output (MIMO) for the UE, and, based on a second determination that the coherence block does not satisfy the threshold, employing the plurality of modular antenna arrays in single-user (Su)-MIMO for the UE.