Wireless Data Offload via Broadcast Encoding for Network Congestion
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Solution Overview
Problem
Current wireless networks face congestion issues, particularly in high-traffic areas and when transferring data from moving vehicles like public transportation, due to limited bandwidth and data speed, which hampers reliable video surveillance data transmission.
Innovation Solution
A system and method for data offload using a mobile communication unit and wayside communication units, where data from surveillance cameras and passenger terminals is encoded into a broadcast standard stream (e.g., MPEG TS) and transmitted to wayside units for forwarding to a data target, allowing for efficient buffering and synchronization to alleviate network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless networks are used for data transmission in high-traffic areas and moving vehicles, then data connectivity is provided to users, but network congestion occurs and data speed reduces
Solution Approach 1:
The system segments the data transmission path by introducing intermediate wayside communication units along the vehicle route. These units act as local data collection points that buffer and forward surveillance data, breaking the direct long-distance wireless transmission into smaller segments between mobile units and nearby wayside units, thereby reducing network congestion and improving data speed.
Solution Approach 2:
Wayside communication units serve as intermediary devices between mobile communication units on vehicles and the central data network. These intermediaries buffer, store, and forward data locally, reducing the immediate burden on the central wireless network and enabling continuous data transmission even when network capacity is limited.
2Reliability
If video surveillance data from multiple cameras is transmitted continuously, then complete surveillance coverage is achieved, but network bandwidth is exceeded and transmission delays occur
Solution Approach 1:
The system performs preliminary action by buffering and pre-processing surveillance data locally in mobile communication units and wayside communication units before transmission. Data is temporarily stored in buffers at these intermediate points, allowing the system to accumulate data during low-traffic periods and transmit in optimized batches, ensuring complete surveillance coverage without overwhelming the network bandwidth.
Solution Approach 2:
The system changes transmission parameters by encoding surveillance video data using broadcast standards (such as DVB-T or ATSC) instead of traditional wireless data protocols. This parameter change in encoding format enables more efficient compression and transmission of large volumes of video data, maintaining reliable surveillance coverage while reducing the effective data burden on the network.
3Productivity
If broadcast standard encoding is used for data transmission, then data transfer capacity increases and reliability improves, but system complexity increases
Solution Approach 1:
The system applies universality by using standardized broadcast encoding formats (DVB-T, ATSC) that are widely supported by existing communication infrastructure. This multi-functional approach allows the same encoding standard to handle various types of surveillance data from different vehicles and camera systems, increasing data transfer capacity while avoiding the need for vehicle-specific custom protocols that would increase system complexity.
Data Source
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AI summary
A system for transferring data between a mobile communication unit and a wayside communication unit; the mobile communication unit being arranged to obtain data from one or more data sources arranged in functional connection with the mobile communication unit, the mobile communication unit comprising at least one encoder arranged to encode said data into a stream format compatible with a broadcast standard and a transmitter arranged to transmit the encoded data stream in accordance with said broadcast standard to the wayside communication unit; and the wayside communication unit comprising a receiver arranged to receive the encoded data stream in accordance with said broadcast standard, the wayside communication unit being arranged to forward the encoded data stream to a data target for decoding.