In-Vehicle Mobile Base Station Dynamic Power Control
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Solution Overview
Problem
Current macro base station approaches are inefficient for providing reliable wireless multimedia services, especially in hard-to-reach and remote areas, and in-vehicle base stations are relatively uncommon despite advancements in LTE technology.
Innovation Solution
A mobile base station system configured with a first access radio for providing an access network inside and outside a vehicle, a second backhaul radio for connecting to a macro cell, and a GPS module for determining location, which adjusts transmit power based on vehicle speed, and includes features like multiple radio interfaces (LTE and Wi-Fi) and a method for managing tracking areas to minimize unnecessary updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If macro base station approaches are used, then coverage area is large, but service reliability in hard-to-reach and remote areas deteriorates
Solution Approach 1:
The patent segments the network into macro base stations for broad coverage and mobile base stations for reliable local service. The mobile base station acts as a segmented unit that can be deployed in hard-to-reach areas to supplement the macro network, ensuring service reliability where macro stations cannot provide adequate coverage.
Solution Approach 2:
The mobile base station serves as an intermediary between macro base stations and mobile devices in remote areas. It connects to macro base stations via backhaul radios while providing access networks to mobile devices, bridging the gap in hard-to-reach locations where direct macro station coverage is insufficient.
2Area of stationary object
If transmit power is increased to improve coverage, then service coverage is enhanced, but energy consumption and interference increase
Solution Approach 1:
The mobile base station dynamically adjusts its transmit power based on real-time conditions including vehicle speed, number of connected devices, and coverage requirements. This dynamic power adjustment ensures adequate coverage while minimizing energy consumption and interference, rather than operating at fixed high power levels.
Solution Approach 2:
The system changes operational parameters including transmit power levels, backhaul radio configurations, and access radio settings based on vehicle motion state and network conditions. These parameter changes optimize the balance between coverage area and energy consumption for mobile base stations in different operational scenarios.
3Reliability
If tracking area updates are performed frequently to maintain network connectivity, then network connectivity is ensured, but signaling load increases
Solution Approach 1:
The mobile base station performs tracking area updates selectively rather than continuously. It updates tracking areas only when necessary based on location changes and network conditions, avoiding excessive updates that would increase signaling load while maintaining adequate network connectivity through targeted update actions.
Data Source
AI summary
Systems and methods for an in-vehicle base station are described. In one embodiment, a mobile base station is disclosed comprising a first access radio for providing an access network inside and outside a vehicle; a second backhaul radio for providing a backhaul connection to a macro cell; and a global positioning system (GPS) module for determining a location of the mobile base station, and for transmitting the location of the mobile base station to a core network, wherein a transmit power of the first access radio is configured to increase or decrease based on a speed of the vehicle.