Transcript MS Powerpoint

Analysis of IP over power
lines in conjunction with
ADSL as a rapid network
deployment package.
David Mackie
Supervisor:
Professor Peter Clayton
Getting a Power Line
Communication (PLC)
network working.
David Mackie
Supervisor:
Professor Peter Clayton
Overview:
Power Line Communication (PLC)
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Transmission of data using power circuit/lines
“IP-over-Power”
Our Focus:
 Low Voltage
 Using the existing power circuit in a building
Layout
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Master Unit
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(APM-45i)
Indoor Controller
Bridge to uplink
Adapters
Adapters
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Master Unit
(APA-15i-e)
Indoor
Like a modem
Power Circuit
DSL Line
Master Controller Ports
Ethernet
(Backbone)
Serial
(Terminal)
Signal
3-phase power
3-Phase Power:
5 Wires + 3-pin Plug = Problem
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Master Controller
5 wires - 3x Live, Neutral & “Protected” Earth
Switch signal between 2 “live” wires. Not Neutral
Separate signal injection method needed
Solution: Signal Coupling
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2 “left over” wires
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Wire back
Found to have a voltage
Left alone!
Alternative
 Another 3-pin plug
 Coupling device
 Signal connector
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Waiting on last
Automatic Configuration
PLC Node Start-up Sequence
PLC Node starts up with parameters in flash memory
PLC Node synchronize with PLC master (slave nodes only)
PLC Node sends out DHCP request via Powerline for IP
address
DHCP server reply with:
1.
2.
3.
4.
1.
2.
5.
6.
IP address, Subnet Mask, Gateway, DNS Server
Option 43: (ftp://username:[email protected]/plc/ia.cfg)
PLC Node obtains IP Address information, establish
connection to FTP server and retrieves configuration file
PLC Node compares the parameters from the configuration
file with its flash memory. If there is a difference in settings,
slave node will copy the new values to flash and reboot
Setup of Master though Serial
plc> setup
Setting up PLC system parameters
IP parameters eth0 (public port)
Address [192.168.0.1]:
Netmask [255.255.0.0]:
Broadcast [255.255.255.255]:
Other IP parameters
Default gateway [169.254.130.90]:
PLC configuration
Node Type (1=Master, 2=Foreman, 4=Repeater, 6=Droid, 8=Slave) [1]:
Multi Master Environment (0=No, 1=Yes) [0]:
Enter sum of selected carriers:(e.g. 3 = use <1> and <2>):
Possible carriers are:
(<1>= 19.8MHz, <2>= 22.8MHz, <4>= 25.2MHz) [2]:
Coupling phase (0=P1-P2/P-N, 1=P1-P3, 2=P2-P3, 3=search best) [3]:
Transmit power:
Power for 22.8 MHz
[8][dBm]:
again 0, dgain 2 2 2
VLAN support
Enable VLAN support (y/n) [n]?
Residence: Cullen Bowels
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THEN
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To be implemented and tested in Cullen Bowels
Difficult to wire UTP
Not on IT’s roadmap
NOW
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Surprise email from Director of IT on 30 April
Cullen Bowels added to IT’s roadmap (3rd term)
New test bed needed
Seems to have stalled
Alternative Products:
HomePlug
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Alliance of companies (mainly in the US)
HomePlug Certification Mark
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Products from different companies work together
Bandwidth
Initially low 1.5Mbps
 Now equal to Ascom
 Higher bandwidths expected soon
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Small number of users/network
Alternative Products:
South African
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Virtual Technician
Consultants (PTY) Ltd
South African Company
Designed from board up
Products
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HomePlug 1.0.1 Compliant
Ethernet, Wireless & USB
14.4 Mbps (4.5 real world)
Still to come
Work
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12V
Mini-network in Hamilton Building
Can it handle Eskom’s voltages
Comparison to HomePlug solution
Questions?