The Radio Network of the University of Bologna Bolognaghini/didattica/sistmultimed/ReteRadio.pdf ·...
Transcript of The Radio Network of the University of Bologna Bolognaghini/didattica/sistmultimed/ReteRadio.pdf ·...
The Radio Networkof the University of Bologna Bologna
University SiteRadio Repeater
bit rate of the links34 Mbit/s ATM4 Mbit/s2 Mbit/s
Rimini
RavennaForlì
Bologna
M.Maggio
BertinoroCalderaro Cesena Riminiskyscraper
1
the old network (1998)based on leased line
Bologna
Cesena
Ravenna
Forlì
Bologna
Bertinoro Rimini
Line Bit-Rate Bologna - Cesena 512 Kbit/s Bologna - Forlì 512 Kbit/s Bologna - Ravenna 256 Kbit/s Cesena – Rimini 256 Kbit/s Cesena - Bertinoro 64 Kbit/s
2
COMPU_TATION
ACCESS TO DATABASES
INTERNALTELEPHONY
TELE-DIDACTICTELE-CONFERENCE
TELE-DIDACTIC
SECRETARYfor STUDENTS
ACCESS TOINTERNET
The Services for the University Network Users
Universityof BolognaNetwork
3
Link ATMvia RADIO34 Mbit/s
ROMAGNA
CINECA
area Zamboni Sinistro
ClinicaNeuro
AUSLS.ORSOLA
AreaPOGGI
BACKBONEATM
in BOLOGNA
AreaCeGRI
AreaTECNICA
AreaSELMI
AreaMATEMATICA
Ist.GIURIDICO
AreaBUB
sc.INFORM.
Dip.ASTRONOMIA
CNAF
Link to Internet24 Mbit/s
The Architecture of the Network
BACKBONEATM in
ROMAGNA
CesenaSc. INFORM.
Forli.Economia
RiminiSTATISTIC
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The Network inside Bologna
3COM SS3300 conUplink ATM OC/12
TAM della Telecom
CISCO 7500
3COM CoreBuilder 7000
CISCO 7206 GARR-B
CISCO 7206 Radio
MediaConverter OC3/E3 GARR-B
TO INTERNET
MediaConverter OC3/E3 Radio
TO ROMAGNA BY RADIO
TAM Telecom
CISCO 7500
CABLETRONSS 6000
CABLETRONSS 6000
CABLETRONSS 9500
with port OC/3 e OC/12
Usersnetwork
TELECOMLink 100MB
Link ATM OC/3
Link ATM OC/12
Link GB
Engeneering Physics - Morassutti
Physics - Irnerio
Users of Areas: Poggi, Selmi
Other Users
CABLETRONSS 8600 Layer 3
3COM NB2
Link ATM E3
Ce.S.I.A.
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Radio Link Characteristics
University SiteRadio Repeater
34 Mbit/s ATM4 Mbit/s2 Mbit/s
Rimini
RavennaForlì
Bologna
M.Maggio
BertinoroCalderaro Cesena Riminiskyscraper
1712M.Maggio - Bertinoro
3814Rimini Skyscraper - Rimini
2.3364M.Maggio-Rimini Skyscraper
2.3314M. Maggio - Ravenna
141134M. Maggio - Forlì
14834M. Maggio - Cesena
85734Calderaro - M. Maggio
81934Bologna - Calderaro
Frequency(GHz)
Distance(km)
bit rate(Mbit/s)
Link
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8 or 4x2 Mbit/sMin. of Comm.17.3 - 17.7 GHz
34 Mbit/sMinistry ofDefense
7.75 - 8.5 GHz
34 Mbit/sMin. of Comm.37.0 - 38.5 GHz
34 Mbit/sMin. of Comm.14.25 - 14.5 GHz
2 or 2 x 2 Mbit/sMinistry ofCommunication
2.3 - 2.44 GHz
bit/rateOwnerFrequence
Italian Regulations forDigital Radio Communication
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The Choice of the Transmission Frequencies:Criteria
• Length of the radio link,due to signal attenuation in the link and rain
• Bandwidth requested,
• Regulations of the Communication Autority, In Italy, the Ministry of communication regulates theuse of radio transmission and, in particular, bandwidthand radio signal modulation.
• Antennas diameter and support structures,due to weight and wing.
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Signal Attenuation due to Rain(depending on trasmission frequency and rain intensity)
very high attenuation for frequencies greather than 10 GHz,sometimes, unavailability of the link
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Length of the Radio Link
• Frequency greater than 10 GHz,- the rain attenuates to much the signal- radio link must be shorter than 15 km
• Frequency smaller than 10 GHz,- radio link up to 60 km- sometimes problems due to “multipath”- space diversity may be used
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CA
LD
ER
AR
O
MO
NT
E M
AG
GIO
BO
LO
GN
A
CA
LD
ER
AR
O
The Outline of the Radio Links of the Backbone(with first Fresnel zone)
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The Backbone ATM over Radio Link
Radio Link
34 MBit/s ATM
2x2 MBit/s
2 MBit/s
MANCesena
MonteMaggio
14 GHz34 Mbit/s
Calderaro
SWITCH ATM8 GHz34 Mbit/s
2.3 GHz2x2 Mbit/s
2.3 GHz2 Mbit/s
ROUTERR
14 GHz34 Mbit/s
BACKBONE ATM
2.3 GHz2x2 Mbit/s
8 GHz34 Mbit/s
SWITCH ATM SWITCH ATM
SWITCH ATM
MANBologna
MANRavenna
MANRimini
LANsBertinoro
MANForlì
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Radio and NetworkEquipment Scheme
34 Mbit/s8 GHz
Calderaro
1+1
8 G
Hz
34M
bit/s
RTA
2 m
34 Mbit/sG.703
8 GH
z34
Mbit/s
RT
1+1
A 3 m
34 Mbit/s8 GHz
MANForlì
Forlì
17 GHz
2 Mbit/s
Bertinoro
LANBertinoro
Interface
Router
1+0
RT17 GHz2 Mbit/s
A0.6 m
V35 2 Mbit/s
MODEM2 Mbit/s
V352 Mbit/s
G.703 2 Mbit/s
Rim
ini
LANsRimini
V35 4 Mbit/s
V35card
4 Mbit/s
Interface
Router
G.703 2x2 Mbit/s
2.3 GHz2x2 Mbit/sRT
inversemultiplexer
G.703 2x2 Mbit/sV35 4 Mbit/s
1+1A
2 m
Ravenna
LANsRavenna
V35 4 Mbit/s
V354 Mbit/s
Interface
Router
G.703 2x2 Mbit/s
2.3 GHz2x2 Mbit/sRT
inversemultiplexer
G.703 2x2 Mbit/sV35 4 Mbit/s
1+1A
2 m
2.3 GHz2x2 Mbit /s
2.3 GHz2x2 Mbit/s
Cesena
A2 m
1+1
G.703
34M
bit/s14 G
Hz
RT ATM FLOW
G.70334 Mbit/s
RouterInterface
ATM
34M
bit/s
LANsScienze dell’
Informazione,ecc.14 GHz
34 Mbit/s
RouterInterface
ATM34 Mbit/s
G.703 34 Mbit/s
AT
M F
LO
W
14 GHz34 Mbit/s
G.703 2x2 Mbit/s
V35 4 Mbit/s
inversemultiplexer
V35 4 Mbit/sG.703 2x2 Mbit/s
1+1A
2 m
2.3 GHz2x2 Mbit/sRT
1+0A
0.6 m
17 GHz2 Mbit/sRT
G.703 2x2 Mbit/s
V35 4 Mbit/s
inversemultiplexer
V35 4 Mbit/sG.703 2x2 Mbit/s
1+1A
2 m
2.3 GHz2x2 Mbit/sRT
A3
m
1+1
8 G
Hz
34
Mbi
t/s
RT
G.7
03
34
Mbi
t/s
A2 m
1+114 GHz 34 Mbit/s
RTG.703 34 Mbit/s
A2 m1+1
14 GH
z 34M
bit/s
RT
G.703 34
Mbit/s
V354 Mbit/s
G.7032 Mbit/s2 porte
Router
ATMcard
34 Mbit/s
V354 Mbit/s
SWITCH ATMSWITCH ATM
SWITCH ATM
G.7
03
3
4M
bit/
s
A2
m
1+1
34M
bit/s
8 G
Hz
RT
Almanet
Bologna
SWITCH ATM
BACKBONE ATM
MonteMaggio
2 m
A1+1
14 GHz 34 Mbit/sRT
G.703 34 Mbit/s
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EXPANDED SCALE
0
10
20
30
40
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60
70
80
90
100
0
10
20
30
40
50
60
70
80
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100 0 5 10 20 40 60 80 100 120 140 160 180-5-10-20-40-60-80-100-120-140-160-180 15-15
AN
TE
NN
A D
IRE
CT
IVIT
Y:
dB
DO
WN
FR
OM
MA
IN B
EA
M
AZIMUTH DEGREES FROM MAIN LOBE
PARALLEL
POLARIZATION (HH,VV)
CROSS
POLARIZATION (HV,VH)
Single Polarized RPE Number 4180Date 2- 6-95
Radiation Pattern EnvelopeAntenna Type Number VHP4-142
ft(m) Antenna4 (1.2) 14250-15350 MHZ Gain: 42.50 dBi at Midband
Envelope for a Horizontally Polarized Antenna (HH,HV)Envelope for a Vertically Polarized Antenna (VV,VH)
For further information ask for Andrew Bulletin 1032, 'Radiation Pattern Envelopes'.
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0
400000
800000
1200000
1600000
dolla
rs
1st 2nd 3rd 4th 5th
Year
Cost for 5 Years
RadioLeased Line
2 610 2851 432 598
Leased LineRadio Network
Costs ($)
Costs (millions of $)
1.432
2.610
0.000
1.000
2.000
3.000
Main Positive Characteristics (a)
• Fault Tollerant system, by introducing redundancy in radio transmitter (1+1 isofrequency) and power supplier.
• Unavailability of the Radio transport, due to meteorological events, only 8 minutes for each year.
• Increasing of the available Bandwidth (34 Mbit/s) between Bologna and Romagna, about 20 times.
• Decreasing of the Transmission Time. For example, using the “ping” program between Cesena and Bologna, from 60-100 msec to 5-10 msec.
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Main Positive Characteristics (b)
• Dinamic management of the available Bandwidth (ATM)
• Support for Quality of Service (QoS), in particular the network may provide services with guaranties for:
- transmission with constant bit rate- delay into a fixed rangeor- best effort service
• Configuration of Virtual LANs, for advanced management.
• Use of the Radio Network for implementing Telephony.
• Support for Teleconference and Teledidactics. 20