Mobile Relay Base Station Distributed Antenna Backhaul
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Solution Overview
Problem
Current cellular network infrastructures, even with relayed extensions, struggle to meet the increasing demand for high data rates and quality services, especially in mobile environments like trains traveling at high speeds, due to limitations in capacity and coverage.
Innovation Solution
The implementation of a distributed antenna system (DAS) with multiple distributed antenna units (DAUs) in a mobile relay base station, configured and controlled through a method that establishes and manages logical backhaul links with the fixed cellular network infrastructure, optimizing capacity, coverage, and performance by providing time-space diversity and cooperative MIMO communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a mobile relay base station travels at high speed (up to 100 m/s), then the service coverage area is expanded to moving vehicles, but the network capacity and connection quality deteriorate due to rapid cell transitions and handover challenges
Solution Approach 1:
The patent divides the mobile relay base station into multiple distributed antenna units (DAUs) spatially separated and distributed along the vehicle. Each DAU can independently communicate with the core network, allowing the system to maintain connections through multiple paths rather than relying on a single antenna, thus improving connection quality during high-speed movement.
Solution Approach 2:
The mobile relay base station acts as an intermediary between the core network and user equipment in moving vehicles. By introducing this intermediate relay station with distributed antennas, the system bridges the gap between stationary core network infrastructure and mobile users, enabling stable connections despite high-speed movement through coordinated communication from multiple DAUs.
2Productivity
If multiple distributed antenna units are deployed in a mobile relay base station, then the network capacity and data rates are improved through diversity and MIMO communication, but the device complexity increases
Solution Approach 1:
The patent combines multiple distributed antenna units into a single mobile relay base station system that operates under unified control. The DAUs work together as a coordinated MIMO system, merging their individual capabilities to achieve higher network capacity and diversity gains while managing complexity through centralized resource allocation and joint processing.
Solution Approach 2:
The patent transitions from a single-point antenna system to a spatially distributed multi-antenna system, adding the spatial dimension to the communication architecture. By distributing antennas across different locations in the vehicle, the system exploits spatial diversity and MIMO effects to increase network capacity without proportionally increasing processing complexity at each individual antenna.
Data Source
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AI summary
A method, apparatus, and computer program for controlling backhaul links of mobile relay base stations are provided. The mobile relay base station according to an embodiment utilizes a distributed antenna system. A mobile relay backhaul radio link context is used in configuration of the mobile relay base station, wherein the mobile backhaul radio link context comprises parameters used for controlling at least mobility and distributed antenna configuration of the mobile relay base station.