Uplink Power Control for MU-MIMO Interference Management
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Solution Overview
Problem
Mobile network operators face challenges in efficiently managing limited wireless frequency spectrum, particularly in areas with inadequate coverage, where expanding capacity without overloading the network is difficult, especially in cases where the Mid-band is burdened with all uplink traffic, leading to reduced capacity.
Innovation Solution
The implementation of a network system utilizing massive multiple-input-multiple-output (MIMO) technology with aggregated modular adaptive antenna arrays, which enables the efficient use of lower frequency bands for uplink signaling, allowing for improved capacity and coverage by leveraging coherence blocks to control inter-cell interference and maximize uplink coverage through advanced semiconductor technologies and beamforming techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the Mid-band is used for all uplink traffic, then uplink coverage is maintained, but network capacity is reduced
Solution Approach 1:
The patent segments uplink traffic across multiple frequency bands (Mid-band and Lower-band) rather than concentrating all traffic in the Mid-band. This allows the network to distribute uplink transmissions across different bands, maintaining coverage in the Mid-band while utilizing the Lower-band for additional capacity, thereby resolving the contradiction between coverage and capacity.
Solution Approach 2:
The patent introduces a frequency band dimension by utilizing both Mid-band and Lower-band for uplink traffic. This multi-dimensional approach allows the system to expand capacity into the Lower-band frequency dimension while preserving Mid-band coverage, effectively adding another layer to the network architecture to simultaneously achieve both coverage and capacity goals.
2Productivity
If additional spectrum is acquired to increase capacity, then network capacity improves, but cost increases
Solution Approach 1:
The patent changes the operational parameters of existing spectrum resources by implementing advanced signal processing techniques, coherence block exploitation, and interference coordination mechanisms. These parameter changes enable the network to extract more capacity from the currently available Lower-band and Mid-band spectrum without requiring additional spectrum acquisition, thus improving capacity while avoiding increased spectrum resource consumption.
3Productivity
If massive MIMO with aggregated modular adaptive antenna arrays is implemented, then spectral efficiency improves, but device complexity increases
Solution Approach 1:
The patent segments the antenna system into multiple modular adaptive antenna arrays that can be independently controlled and optimized. This segmentation allows the complex massive MIMO system to be broken down into manageable modules, each handling specific spatial streams or user equipment, thereby achieving high spectral efficiency while making the overall system more manageable and less complex through modular architecture.
Solution Approach 2:
The patent implements adaptive antenna arrays with dynamic beamforming capabilities that can adjust their radiation patterns and spatial filters in real-time based on channel conditions and user requirements. This dynamic adaptation allows the system to optimize spectral efficiency for each transmission scenario without requiring a fixed complex structure, as the system adapts its configuration to match the operational needs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances uplink capacity, reduces the need for additional spectrum acquisition, and provides cost savings while maintaining or improving network performance, even in areas with limited spectrum availability.
Implementation Method 1
leveraging coherence blocks to control inter-cell interference and maximize uplink coverage through advanced semiconductor technologies and beamforming techniques
Data Source
AI summary
Aspects of the subject disclosure may include, for example, receiving, over an uplink (UL) via a combination of coherent modular antenna arrays, first transmissions from a first user equipment (UE) and second transmissions from a second UE, wherein the first UE and the second UE are being served by the cell in multi-user (Mu)-multiple-input-multiple-output (MIMO) mode, determining, based on the first transmissions and the second transmissions, that a probability of the second UE interfering with the first UE in the UL satisfies a particular threshold, responsive to the determining, identifying an adjustment to an UL transmit power for the first UE, and causing the first UE to implement the adjustment to the UL transmit power. Other embodiments are disclosed.