Dynamic Wireless Backhaul for Mobile Network Interference Reduction
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Solution Overview
Problem
Current cellular mobile networks, especially LTE-Advanced, face challenges in providing good user experience at cell edges due to interference, which increases complexity and reduces user data throughput, despite advanced features like joint processing and MIMO.
Innovation Solution
A dynamic wireless backhaul system that adapts network architecture based on user requirements, dynamically activating only necessary access nodes with minimum interference, using a processing unit to manage point-to-multipoint wireless backhaul links and adaptive multi-antenna transmission schemes, and optimizing access and backhaul link frequencies to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint processing COMP or MIMO techniques are used to improve cell edge quality, then user experience at cell edge is improved, but network complexity increases significantly
Solution Approach 1:
The network is segmented into cell-centric operations for coverage and a backhaul-centric dynamic network for throughput optimization. Access nodes are dynamically selected based on user requirements rather than fixed cell boundaries, dividing the network functionality between traditional cellular access and dynamic backhaul routing.
Solution Approach 2:
The backhaul network dynamically reconfigures which access nodes are active based on real-time user requirements and location. The processing unit continuously determines optimal access node assignments, making the network adaptive rather than static, allowing flexible resource allocation without fixed cell structures.
2Reliability
If joint processing COMP or MIMO techniques are used to improve cell edge quality, then interference management is enhanced, but user data throughput decreases due to high data exchange requirements
Solution Approach 1:
The patent extracts the coordination function from traditional cell-based joint processing and relocates it to a backhaul network controlled by a processing unit. This separates user data traffic from coordination signaling, allowing user data to flow directly through optimized backhaul paths without being burdened by coordination overhead.
Solution Approach 2:
A processing unit acts as an intermediary that centrally determines access node assignments and manages backhaul routing. This intermediary coordinates network resources efficiently while allowing direct data paths between access nodes and users, reducing the need for extensive inter-base station data exchange.
3Productivity
If dynamic access node selection is implemented to reduce interference, then spectral efficiency is improved, but network control complexity increases
Solution Approach 1:
The processing unit performs multiple functions including determining active access nodes, mapping terminals to access nodes, and managing backhaul links. This centralized multi-functional controller simplifies the overall network architecture by consolidating control functions rather than distributing complexity across multiple independent systems.
Data Source
AI summary
The present invention relates to a system comprising a processing unit, a plurality of access nodes adapted to communicate with a plurality of mobile terminals and wireless backhaul links adapted to connect said access nodes and a wireless backhaul termination interfacing with a core network, According to the present invention:—said processing unit determining dynamically out of said plurality of access nodes, access nodes to remain unused and, access nodes to be used for supporting communication of said mobile terminals, said determination taking into account at least one optimisation criterion consisting in reducing the interference between active access nodes and mobile terminals; said processing unit determining a mapping between said mobile terminals and said active access nodes,—said wireless backhaul links consisting in point-to-multipoint connections between said wireless backhaul termination and said access nodes.