Dynamic Beam Management for Interference Reduction in Shared Spectrum
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Solution Overview
Problem
Current cellular networks face challenges in reducing interference between neighboring cells that share resources, especially when backhaul connections are non-ideal, leading to inefficient resource management and potential interference issues.
Innovation Solution
A system that determines a set of beams for transmitting wireless signals by estimating interference based on signal properties received by mobile devices in neighboring cells, allowing for adjustments in beam characteristics such as power, width, and direction to minimize interference without limiting spectrum sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency resources are shared between macro-cells and small cells to increase traffic handling capacity, then resource efficiency is improved, but interference between neighboring cells increases
Solution Approach 1:
The patent applies dynamic beam management where the network unit continuously adjusts beam directions and characteristics based on real-time interference measurements. Mobile devices report signal properties from neighboring cells, and the network dynamically reconfigures beams to avoid interference while maintaining frequency sharing, resolving the contradiction between resource efficiency and interference
Solution Approach 2:
The patent changes beam parameters (direction, width, power) based on measured interference levels. By adjusting these parameters dynamically, the system can maintain high traffic handling capacity through frequency sharing while reducing interference impact on mobile devices in neighboring cells
2Object-affected harmful factors
If coordinated scheduling is implemented to reduce inter-cell interference, then interference levels are reduced, but backhaul requirements become more stringent
Solution Approach 1:
The patent enables self-service interference management where mobile devices autonomously measure and report signal properties from neighboring cells. The network unit uses these reports to automatically adjust beam directions without requiring complex centralized coordination or ideal backhaul connections, reducing backhaul requirements while maintaining interference reduction
Solution Approach 2:
The patent implements a feedback mechanism where mobile devices report measured signal properties to the network unit, which then adjusts beam configurations accordingly. This closed-loop feedback system enables effective interference management with simpler backhaul requirements compared to traditional coordinated scheduling
3Object-affected harmful factors
If beam directions are adjusted to avoid interference with neighboring cells, then interference is reduced, but resource sharing efficiency may be compromised
Solution Approach 1:
The patent uses dynamic beam adjustment where the network continuously optimizes beam directions based on real-time interference measurements. This allows the system to maintain efficient resource sharing when interference is low and switch to interference-avoidance modes when necessary, balancing both resource efficiency and interference reduction
Data Source
AI summary
A system is configured to obtain an estimated degree of interference for each of a plurality of beams. The estimated degrees of interference are determined based on properties of received signals transmitted by a transmitter in the first cell using the plurality of beams. The signals have been received by mobile devices while in the serving area of at least one second cell. The system is further configured to take a decision, based on the estimated degrees of interference, whether to avoid usage of one or more beams and/or whether to adjust one or more beams, which are transmitted in a spectrum shared by the cells, determine a set of beams in accordance with the decision, and cause the transmitter to use the set of beams to transmit wireless signals to mobile devices in the first cell.