Long Distanced Bus Stops Wireless Surveillance Transmission System in Real-time

Long Distanced Bus Stops Wireless Surveillance Transmission System in Real-time (Along with Buses Data Wireless Transmission)

1. Purpose
Through WiFi MIMO high bandwidth transmission technique, the images at each bus stop go back to the control center. Buses data is also transmit wirelessly to the bus stops to update information of the buses.

By using Wireless WiFi MIMO transmission system, there are advantages as below:

1.Images of cameras at each bus stop are transmitted to the control center.
2.Offers high bandwidth backbone for bus stops to update information of the buses.
3.No need to dig the roads for wires, being able to lower the influences to public traffic.
4.No need to monthly or yearly pay ISP for internet bandwidth.
5.Wireless surveillance system installation is flexible and easy to extend.
6.Wireless system can be extended and added wireless coverage for internet surfing for the passengers.
7.Digital broadcasting and emergency communication can be implemented for better buses management and customer service.

2. Design Requirement

There are total 10 bus stops in the designed area. Each bus stop has 4 units of 2MP cameras, installed crossly. The required bandwidth is 4Mbps * 4 units* 10stops >=160Mbps (2MP camera: 2.5Mbps @daytime, 4Mbps @nighttime). Real time images can be transmitted to the control center for recording by multiple wireless backbones.

As for buses information updates to bus stops, data is transmitted through the wireless highway, established by wireless backbone system. Estimated required bandwidth is about 10-20Mbps, another 10-20Mbps is saved for digital broadcasting and emergency communication. The whole required bandwidth for multiple backbone is 160Mbps+20Mbps+20Mbps>=200Mbps.
3. Bus Stop Cameras Installation and Environment Sketch
4. Wireless WiFi MIMO Repeater Backbone Transmission Design

Multiple Wireless Backbones Bandwidth Calculation
4-1.Red Backbone:120-150Mbps (4Mbps*4 units *5 stops =80Mbps)
4-2.Blue Backhone: 140-150Mbps (4Mbps*4 units *2 stops =32Mbps)
4-3.Yellow Backbone: 150Mbps (4Mbps*4 units *1 stop =16Mbps)
4-4.Purple Backbone: 140-150Mbps (4Mbps*4 units *2 stops =32Mbps)
Design total bandwidth 550Mbps. Actual required bandwidth160Mbps ~ 200Mbps

5. Bus Stop Wireless WiFi MIMO Repeater Backbone Transmission Representation