ITS Communication Design4_RC

8/10/2019 ITS Communication Design4_RC

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ITS COMMUNICATION

NETWORK

CE 8140Fall 2013

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Technical Characteristic of Studied

Wireless Technologies

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Key Characteristics

Specif icat ion

Each technology discussed is derived from an Institute of

Electrical and Electronics Engineers (IEEE) standard.

Standards-based solutions allow for custom-off-the-shelf(COTS) equipment to be used.

Licensed

Frequency that is used during transmission can be either

licensed, by the Federal Communications Commission(FCC), or unlicensed.

It is important to weigh the cost of obtaining licenses for

licensed bands with the potential interference faced if

using unlicensed frequencies.

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Key Characteristics

Frequency

Wireless technologies transmit their data through a range of

frequencies specified by the FCC.

Frequency band utilized by the wireless technology plays a

major role in determining the range and penetration of thewireless signal

Range

Range usually given is the maximum obtainable range for the

wireless technology; however, that range is not necessarily theobtainable range at the maximum link rate.

Link Rate

Each wireless technology is capable of transmitting a certain

amount of information in bits per second--known as link rate.

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Key Characteristics

Throughput

Throughput is the actual amount of user-generated data

that can be transmitted per second.

Line-of-sigh t (LOS) Requ irementsA clear LOS between two communicating radios

enhances the signal strength and, thus, the achievable

link rate and throughput.

Range vs . Throughput

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Communication Architecture

Infrastructure

Mesh

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Mesh vs. Infrastructure

In terms of cost, a mesh solution will be superior to an

infrastructure deployment; simply because the number of

fiber optic Internet connections required in a mesh

deployment is considerably lower.

In terms of reliability, the infrastructure model is expected

to perform better because each of the node clusters has

its own connection and there is no forwarded traffic.

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Data transmission within one mesh cluster

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Data transmission within infrastructure cluster

Fiber Internet Connection


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MJPEG video bandwidth requirements

Cisco 1310 with an estimated range of 865 feet at 54

Mbps and a range of 3465 feet at 11 Mbps when usingan omni-directional antenna.

WiMAX - an M/A-Com base station is expected to

produce a line-of-sight range of approximately 2.5

miles with an omni-directional antenna.

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Flowchart for network design

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ITS Equipment Layout- Greenville

Located on I-385, north of

I-85, with a satellite camera

located on I-85

approximately 2.5 miles

north of the I-385/I-85

intersection.

14 cameras to be

connected wirelessly

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CAMERA LOCATIONS

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Assumptions

The router/radio assumed will be the Cisco 1310, with an

estimated range of 865 feet at 54 Mbps and a range of

3,465 feet at 11 Mbps

1 Cameras (~1.7 Mbps) 1 RADAR devices (~0.6 Mbps)

Dynamic messaging signs require negligible bandwidth

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Wi-Fi infrastructure network

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Divides the 14 traffic

surveillance cameras into six

clusters:

Three groups of three,

Two groups of two, and

One group of one

Total of six fiber-optic

Internet connections required

Fourteen Cisco 1310 radio

Camera 97 98 99

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98 1911 0 2495

99 4398 2495 0

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Wi-Fi Mesh Network Divides the fourteen traffic

surveillance cameras into

two mesh clusters

A group of six and

a group of eight.

A high-gain directional

antenna is connected to the

widely separated node

Total of two fiber-opticInternet connections

required, and fourteen

Cisco 1310 access points

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Cost analysis

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Project instructions

Design infrastructure network and mesh networkcommunication system for the site locations assigned to yourgroup using Wi-Fi.

Perform a performance-cost analysis for your proposedsystems.

Consult the paper on wireless communication alternatives as aguide.

The hybrid system should consist of a combination of wireless andwired connections.

Utilize current location of devices and a TMC within 5 miles.

Provide reference/explanation for the performance and costassumptions in your analysis.

Consider 1000 ft extra fiber per mile for maintenance of the fiber opticconnection.

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Deliverables

A high level drawing showing the communication

hubs and wireless/wireline connectivity for your

proposed system (11x17 scaled drawing ).

Data transmission diagram for all clusters in meshnetwork.

Project report:

Explanation of the methodology adopted, assumptions made and

performance-cost analysis . Design of fiber optic cable for thebnearest fiber drop location to a

traffic management center (use the GDOT document).

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Hints

Do you need overhead fiber or underground? Can you go

over head when you are crossing the road?

Fiber drops are for overhead connections.

What are use of the slack loops or pull boxes? Do youneed them for your system?

Link to GDOT document (posted in Blackboard):

http://www.dot.ga.gov/travelingingeorgia/trafficcontrol/Doc

uments/TrafficSignals/TrafficSignalDesignGuidelines.pdf

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Data transmission within one mesh cluster

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Documents

ITS Communication Design4_RC