didigy solutions - keeping an eye on the traffic
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Connect Freight GoVisual Case Study
he Victorian Governments Department of Transport - Connect Freight initiative
seeks to develop Information and Communication Technology (ICT) based
solutions that will improve the efficiency of Victorias freight and logistics industry.In the 21st century, core transport infrastructure includes not only roads, bridges
and ports, but also ICT.
System Overview
Intelligent Transport Systems Australia engaged Didigy Solutions to provide
technical and project management services for the GoVisual component of the
project. The initial goal of GoVisual is to enable stakeholders to view live video
images from the Swanson Dock area via internet connected web browsers and
mobile devices facilitating visual proof of congestion, available slots, truck arrivals
and port conditions.
Fixed dome IP cameras are connected using BPL (Broadband over Powerline) to a
central aggregation point where the signal is fed via a 2Mbps Private Network
using WiMAX (Worldwide Interoperability for Microwave Access) technology to the
Rialto building. This signal is then relayed by WiMAX to ITS Australia based servers
and storage infrastructure in Port Melbourne.
The camera content is delivered from ITS Australia to the Connect Freight Public
Access web site hosting server and directly to the Internet for authorised users ofthe system via a dedicated 1Mbps link.
The system also includes multiple Wi-Fi Access Points for future provision of
telematics information into and out of parked vehicles awaiting access to the
container facilities. Some envisaged uses are real-time access to the Vehicle
Booking System (VBS), slot loading times, delay advice and access to the internet
for freeway and major arterial information, in-truck driver education, Instant
Messaging (IM), IP telephony (Skype) and port familiarisation videos for new drivers.
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Camera Selection & Positioning
Camera positions were chosen to provide views of the Patrick Superpark, P&O
Ports entry points and overall traffic in the Swanston Dock road precinct.
Cameras were selected for excellent daylight viewing as well as good twilight and
night viewing. Cameras and housing also required a small form factor to ensure
wind loading on the light poles remained within design limits. Due to privacy issues,
the cameras were mounted so that no personally identifiable information was
available from the system.
Figure 1 - Camera Location Map
Six Axis 225FD cameras were selected for their performance, IP66 rated housing,
inbuilt fans and heaters. They were mounted on the existing 12 metre high street
lighting pole (Fig. 1) spanning a 350 metre distance.
Figure 2 - Mounted Cameras and Equipment Cabinets
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On-Site Transmission Systems
Supplying power and connectivity between the cameras back to a central
location within a strict budget ruled out a fibre backbone which would be
required to span the distance. Also, a request by Patrick Stevedore to not use
wireless based technology in an already crowded RF spectrum resulted in the use
of Broadband over Powerline (BPL) supplied by NEC Australia. This was one of theirvery first deployments in Australia and worked exceedingly well giving between 70
180Mbps bandwidth availability between each camera / Wi-Fi location back to
a head end unit at the central aggregation point.
Figure 3 - Broadband over Powerline (BPL) Diagram
Wi-Fi Access Points
Three Cisco Aironet 1300 Access Points fitted with Huber + Suhner directional
antennas aimed away from the Patrick Stevedore facility and 45 degreedownward firing were used to ensure any rearward transmissions were directed
above the facility whilst still giving good coverage to the roadway area.
Figure 4 - Wi-Fi Access Points and Antennas
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Off-Site Transmission System
The Swanson Dock area is not well serviced by traditional ADSL connections with
the best connection speed available < 200kbps downlink and < 50kbps uplink to
deliver the video content back to the servers which was unusable.
A cost effective alternative was required which resulted in a Layer 2 dedicated2Mbps / 2Mbps Bi-Directional Private Network using WiMAX on proprietary RF
spectrum to minimise interference with the Patrick Stevedore RF infrastructure. Also,
the narrow beam produced by the high gain directional antennas directed
upwards and away from surrounding facilities to the top of the 250 metre high
Rialto building further reduced potential interference.
The signal was then transmitted from the Rialto by WiMAX to Intelligent Transport
Systems Australia in Port Melbourne where the Didigy Solutions server and storage
infrastructure is located.
Internet Access
A 1Mbps / 1Mbps Business Grade SH-DSL internet connection provides external
access to the server / storage systems for both the Connect Freight Public Access
website and the Authorised User camera website.
Figure 5 - 2Mbps / 2 Mbps Bi-Directional WiMAX Private Network
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Connect Freight Public Access still images are fed to the Connect Freight Public
Access webserver on an on-demand basis when a new user enters the website or
a connected user requests a refresh. Views are restricted to 160 x 120 pixel.
Figure 6 - Public Access Connect Freight website
Connect Freight - Authorised Users Users request access to enhanced services
by applying through the Connect Freight Public Access website. Applications
are processed by the Department of Transport and approved users are passed
to Didigy Solutions for implementation.
Authorised viewers then have access to:
a. Higher resolution (up to 640 x 480 pixel) views on a per camera basis.b.
The ability to personalise their web browser views with selectedcameras.
c. Different resolutions on a per camera basis.d. Access via mobile phones (2G static images, 3G streaming images)
and internet connected mobile devices.
e. E-mail, SMS and MMS alerts (this capability exists in the system currentlybut is not presently activated).
Figure 7 - Personalised View of Cameras for Authorised Users
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Server & Storage Infrastructure
The requirement to provide real-time, constantly updated images for the
expected 50 - 100 users meant that conventional methods of connecting directly
to the network video (IP) cameras would not work.
Therefore, a High Availability server based system capable of servicing a large
number of concurrent users was implemented.
Didigy Solutions Software Development Unit supplied the following systems:
1. Browser based system for viewing cameras by PC, web connected mobiledevices (UMPC, PDA) and 2G / 3G connected mobile phones.
2. Linux based non-proprietary network routers and DNS Server.3. High Availability (HA) Server set :
a. 2 x Dual Xeon servers (one Active with one Passive in automaticfailover mode)
b. Linux Enterprise platformc. Dual RAID-1 Hard Disk Drives (HDD) for Linux OS total of 4 x HDDd. Dual 136GB High Availability redundant storage in RAID-5
configuration for:
i. IP camera hosting applicationii. 2 x synchronised copies of video content with auto failover for
content capture to provide archival footage for further
research into traffic conditions
Figure 8 - High Availability Server Set with Redundant Distributed Storage Array
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ITS Australia Data Centre
ITS Australias purpose built facility in Rocklea Drive, Port Melbourne provides the
co-location facilities for the Didigy Solutions server and storage system.
The Centre has security, card access control, video surveillance system (also
supplied by Didigy Solutions), conditioned power, Uninterruptible Power Supply
(UPS) and triple redundant air conditioners.
Didigy Solutions Pty Ltd can provide the following services:
- Project Management - Software Development Personnel Windows & Linux
- Special Purpose Project Teams - Software and Hardware Development for Bespoke Systems
- Technology Transfer and Training - Hosted Services for Offsite Storage of Surveillance Content
- Technology Audits - Remote Monitoring, Control and Management
- Network Design, Equipment Provisioning and System Commissioning
- Integration of Multiple Disparate Systems Single Location or Dispersed (SCADA, IP, Machineinterfaces, etc)
Didigy Group Pty Ltd - National Intelligent Transport Systems Centre
Unit 3, 3 Rocklea Drive, PORT MELBOURNE 3207
Contact: Graeme McGeorge +61 (412) 165 555
Web http://DidigyGroup.com E-mail: [email protected]