Transcript Intro to Relatively Cheap High Speed Multimedia Applications

Intro to Relatively Cheap High
Speed Multimedia Applications
Racine Amateur
Television Society &
RCARES Digital Group
http://www.kb9mma.com/HSMM-RACINE
Goals
•The goal of this presentation is to get
you thinking. How you can use HSMM
for emergency communications and for
public service events.
•It is up to you to decide the options
whether running HSMM is worth it.
Why should we care?
• Digital radio is ham
radio’s future!
• Commercial and other
entities are already there
• Ham radio is behind in
this development.
• Open protocols- TCP/IP,
off the shelf software and
hardware.
• Lastly, and not most
importantly it is FUN!
• This is NOT hard, just takes
patients
• OLD and New hams can work
together on these projects!
• Some of this can be non-line of
sight.
• HSMM can provide a very cost
effective failure resistant
wireless backbone for area ham
digital systems
• It integrates into anything
TCP/IP compatible
What is HSMM?
HSMM, or High Speed Multimedia, is the name of an ARRL
sponsored technical project to introduce high speed data radio
to amateur radio. HSMM generally uses standard internet protocols
, so that regular applications such as web, ftp, email and
other applications can run over it without modification.
The popular license free 802.11a/b/g services operate
on bands that overlap amateur frequency allocations,
giving us cheap hardware that can be used in in part 97 operation…
when used with care
Immediate EMCOMM Applications
–
–
–
–
Echolink
Winlink 2k
APRS
Telpac nodes
– Document Storage &
Access
– Printer Sharing
– IRLP Repeater Links
– APRS Internet Feed
– Weather Web Sites
– Regular Internet Service
– Repeater control
– Video
– Audio
– Hospital / EOC
interconnects
– Event Management
– Custom web
applications
– Work flow software
– And more!
Major Differences between WI-FI and HSMM
•PART 15 Devices, users, •Part 97 Devices, Users, applications
business.
•Are Limited to 100 watts with APC
•Limted to 6 Db antennas
(automatic power control) into the antenna.
•Usually have 50-200mW •Can use any antenna we can dream up!
•Limited to Part 97 Regulations
Trancievers
•Make best effort to keep Part 15
•Are NOT FCC Licenced
off of network
•Have built a businesss
•Can use Authentication Methods to
based on a very shaky
Ensure this, as long as it is publicly posted
“wild west” type
frequency allocation
Basic Network Elements
•Client Access device
•AP – Access Point
•Amplifiers / Antennas – many, many!!!!
Amplifiers
• Picture of the RF Linx amplifier.
• Specifications can be found at
http://www.rflinx.com/Amplifiers/2.4GHzAmplifiers/2400_C_Series.htm
• We purchased them from Fab-corp.com. Make
sure to purchase the MMCX to whatever
connectors!
• Others can be found on EBAY for BI-Directional
AMPS!
Typical setup
A
B
C
D
E
F
G
H
SELECTED
ON-LINE
AP WILL BE SET IN
MULTIPOINT BRIDGING
MODE ENABLING ALL
AP
AP'S TO SEE AND
CONNECT THE
NETWORK/
COMMPUTERS
TOGETHER!
OTHER METHOD IS TO
CONNET AP TO REGULAR HUB
THIS WILL ENABLE ALL
COMPUTERS ON NETWORK TO
ACCESS HSMM NETWORK
CONNECT AP WITH CROSSOVER CABLE TO
REGULAR ETHERNET NIC
(RECOMMENDED SETUP)
DEDICATED HAM COMPUTER
TO TALK TO HSMM NETWORK.
Another AP can be setup
for wireless clients here
inside your shack!
A
B
C
D
E
F
G
H
SELECTED
ON-LINE
hub
Path surveys are critical in network design!!!!
Signal alignment
We are using net stumbler as a signal level and antenna alignment tool.
http://www.netstumbler.com
We modified DWL-120+ USB devices to plug into the antenna / amplifier array.
This eliminates the need for expensive alignment tools.
Pealed off antenna covering
to reveal mini ¼ wave
soldered shield and center
conductor to N connector
Fixed Location Installation
144.00
HSMM
Bridge
HSMM
Bridge
HSMM
Bridge
HSMM
Bridge
Telpac
Node
APRS
Digi / Internet Gateway
Router
Hub
WinLink
PMBO
Public Internet
*graphic= John Beadles – N5OOM – Intro to HSMM –Hamcom 05
144.00
Ham station in an EOC, hospital,
club shack, tent, etc...
Emergency Deployment Access
Point
Access Point for
Local Distribution
Equipment in
weatherproof
boxes
Bridge to
an internet
connection
Power run up
the Ethernet
cable
DSL Router
Computer
configured as
an EMCOMM
Server
• Net Controls
• Served Agency Liasons
• Weather Liasons
*graphic= John Beadles – N5OOM – Intro to HSMM –Hamcom 05
• Health & Welfare Liasons
One Possible Digital Network
I
IRLP Repeater
W
Winlink 2000 PMBO
R
Internet Router
I
I
W
W
McKinney
Denton
R
Public Internet
R
Wireless Internet Bridge
I
Short Internet Connection
Plano
I
Irving
Richardson
I
W
I
Garland
I
I
Ft. Worth
I
W
W
Dallas
R
I
Arlington
*graphic= John Beadles – N5OOM – Intro to HSMM –Hamcom 05
R
Mesquite
Radio Metropolitan Area Network
(RMAN)
Emcomm
Access
Point
Satellite Uplink
2.4 GHz
5.8 GHz
D-star
1.2
GHz
900MHz
*graphic= John Beadles – N5OOM – Intro to HSMM –Hamcom 05
World Wide example using 44.X.X.X. networking
routing and VPN.
Demo Time!
• I will now show you some Live HSMMing!
• Also Appendix has some more technical
information on Vendors and Freq
allocations.
Vendors
•
Fleeman, Anderson & Bird
–
–
•
Pacific Wireless
–
•
http://www.pacwireless.com/
RF Cables, Inc.
–
•
http://www.fab-corp.com/
Owned by hams in Florida
http://allrfcables.com/
HyperLink Technologies
–
http://www.hyperlinktech.com/
•
channels in 2.4 GHZ
*graphic= John Beadles – N5OOM – Intro to HSMM –Hamcom 05
• 802.11b channels 1-6 overlap amateur allocations
• AMSAT requests not to use ch 1 due to sat interference
• CH2 center sits right in the middle of high speed data rate subband,
and does NOT leave the ham bands!!!! Note there are really only 3 non–overlapping
2500
2490
WB FM, FSTV,
FMTV, SS
Experimental
2438 - 2450
Satellite Hi Rate Data
2433 - 2438
Satellite
2430 - 2433
Fast Scan TV
2418 - 2430
Hi Rate Data
2413 - 2418
Repeater 25 KHz Output
2410 - 2413
Satellite 2408 - 2410
Satellite Hi Rate Data
2403 - 2408
Satellite
2400 - 2403
Packet 2399 - 2399.5
Control Links 2399.5 - 2400
Fast Scan TV
2396 - 2399
Fast Scan TV
2390 - 2396
802.11b STANDARD FREQS
2480
2470
2460
2450
2440
2430
2420
2410
2400
2390
Edge - 2473
CH 11 - 2462
CH 10 - 2457
CH 9 - 2452
CH 8 - 2447
CH 7 - 2442
CH 6 - 2437
CH 5 - 2432
CH 4 - 2427
CH 3 - 2422
CH 2 - 2417
CH 1 - 2412
Edge - 2401
2.4 GHZ(802.11b/g)
• 11 overlapping
802.11b/g
channels
• 11 MHz wide
each, 5 MHz
spacing
HAM ALLOCATION
5 GHz (802.11a)
• 12 non-overlapping 802.11a channels
Propagation Beacons
5760.3 - 5760.4
• 3 sets of 4 channels
• 4x40mw ch for indoor
• 4x200mw ch for indoor, outdoor
• 4x800mw ch for outdoor
• Power specified at the IR
Unspecified
5650 - 5925
• 20 MHz wide each
• More bandwidth requested
5260
5280
5300
5320
U-NII
Lower Band
(40mw max)
U-NII
Middle Band
(200mw max)
5745
5765
5785
5805
5180
5200
5220
5240
Ham Allocation
5470 - 5725 MHz
Proposed additional U-NII Spectrum
U-NII
Upper Band
(800mw max)
*graphic= John Beadles – N5OOM – Intro to HSMM –Hamcom 05
5925
5825
5725
5650
5550
5450
5350
5250
5150
802.11a Standard Frequencies
Projects for your organization
• http://www.n5oom.org/hsmm/rootenna_proj
ect.htm
• Client HSMM AP and Bridge setups.
• Cantenna’s
• Installing and testing field applicaitions for
your local and state plans.