LTE Base Station Dynamic Bandwidth Allocation for Video
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Solution Overview
Problem
LTE wireless networks in public safety applications face reduced throughput during high user density events, such as large events at stadiums, due to insufficient capacity and network congestion, which affects video data transfer efficiency.
Innovation Solution
The LTE wireless communication system dynamically allocates bandwidth between mobile devices via an LTE base station, using push-to-video (PTV) and request-to-video (RTV) connections, with the dispatch operation center managing bandwidth based on priority characteristics and network traffic thresholds to ensure efficient video data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE wireless network provides infrastructure for public safety applications, then video data transfer capability is enabled, but network throughput is reduced during high user density events
Solution Approach 1:
The system dynamically switches between PTV and RTV connection modes based on real-time network conditions. When network traffic is below the threshold, PTV mode provides full-duplex video communication; when traffic exceeds the threshold, RTV mode restricts to request-response video communication, thereby adapting system behavior to changing conditions and maintaining reliability during high density events
Solution Approach 2:
The base station monitors network traffic and changes the operational parameters of video connections by selecting different connection modes (PTV or RTV) and adjusting bandwidth allocation accordingly. This parameter change allows the system to optimize video data transfer capability while maintaining acceptable throughput levels during high user density events
2Productivity
If LTE base station allocates bandwidth for PTV connection, then video data communication efficiency is improved, but network congestion worsens during high traffic conditions
Solution Approach 1:
The base station continuously monitors network traffic conditions and uses this feedback to determine whether to allocate bandwidth for PTV or RTV connections. This feedback mechanism ensures that video communication efficiency is maintained when possible, while preventing network congestion from worsening by switching to RTV mode when traffic exceeds the threshold
Solution Approach 2:
The bandwidth allocation for video connections is made dynamic rather than static. The system can switch between PTV mode (higher efficiency, more bandwidth consumption) and RTV mode (lower efficiency, less bandwidth consumption) based on real-time network conditions, thereby optimizing the balance between communication efficiency and congestion prevention
3Ease of manufacture
If LTE network uses lower thresholds for capacity at cell edges, then infrastructure requirements are reduced, but network performance deteriorates during high user density
Solution Approach 1:
The system compensates for the lower capacity thresholds by dynamically adjusting connection modes. When network traffic exceeds the threshold (which occurs more easily due to lower capacity settings), the system switches to RTV mode to reduce bandwidth consumption and maintain acceptable performance levels, thereby offsetting the limitations of reduced infrastructure capacity
Data Source
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AI summary
An LTE wireless communication system includes an LTE base station, and mobile wireless communications devices. Each mobile wireless communications device exchanges video data with another mobile wireless communications device via the LTE base station and by sending at least one of a PTV request and an RTV request to the LTE base station. The LTE base station is configured, when network traffic is below a threshold value, to allocate bandwidth for a PTV connection between a given mobile wireless communications device and a given other mobile wireless communications device, and, when the network traffic exceeds the threshold value, to allocate bandwidth for an RTV connection between the given mobile wireless communications device and the given other mobile wireless communications device.