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Cellular Backhauling over Satellite: The Other Side of the Coin
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Transcript of Cellular Backhauling over Satellite: The Other Side of the Coin
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Cellular Backhauling over SatelliteThe Other Side of the Coin
Robert Novak, 28 February 2017
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Satellite Backhauling as Seen by Mobile Op‘s
High Delay
Low Throughput
Expensive
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Agenda
Efficient
High Quality
Flexible
Future Proof
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~4.400 MNOs
MNOs Worldwide
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Example from the Mediterranean
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Statistical Multiplexing
...to efficiently transport traffic sources that alternate between bursts of transmission activity and periods of no activity.- Kavitha Chandra, Center for Advanced Computation and Telecommunications University of Massachusetts at Lowell, Massachusetts
Statistical multiplexing is a key concept in data networks because traffic is bursty- Key Concepts in Networking, University of Washington online course
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Bursty Traffic
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How to Handle Bursty Traffic
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How to Handle Bursty Traffic – cont‘d
// Capacity is assigned to Cells that really need Bandwidth //
A cell gets assigned CIR plus extra pool capacity shared by all cells. Unused CIR of one cell is immediately available to other cells.
The total network traffic capacity is split in multiple TDMA carriers Cascading of MF-TDMA carriers multiplies bandwidth
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Microwave Example
150 Mb/s150 Mb/s
150M b/s
BH=450 Mb/s ?
BH=n x avg x g
BH=3 x 90 x 0,9
BH=243 Mb/s
BH = Backhaul Capacityn = number of linksavg = average link utilizationg = gain factor
BH=243 Mb/s (1,85:1 overbooking)
BH=20 x 90 x 0,3
BH=540 Mb/s
BH=540 Mb/s (5,5:1 overbooking)
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Statistical Multiplexing – Key Message
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Lesson learned: the more sites accessing the channel (n),the more gain from statistical multiplexing (g)
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Satellite Outbound
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SKYWAN Outbound
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Satellite Inbound
BH=n x avg x g
BH=8 x 9,6 x 0,8
BH=61,44 Mb/s
∑BH=61,44*6=368,64 Mb/s
Overbooking 2:1
48 remotes networkremote max=16 Mb/sremote avg=9,6 Mb/sRequired SCPC Capacity: 768 Mb/s
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SKYWAN Inbound
BH=n x avg x g
BH=48 x 9,6 x 0,25
∑BH=115,2 Mb/s
Overbooking 6,7:1
48 remotes networkremote max=16 Mb/sremote avg=9,6 Mb/sRequired SCPC Capacity: 768 Mb/s
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Total Cost of Ownership
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SCPC Legacy HUB SKYWAN Inputs HUB Number of remotes 48HUB Price $336.000 $300.000 $21.600 Max capacity per remote (Mb/s) 16
Total $300.000 $300.000 $50.000 Avg capacity per remote (Mb/s) 9,6Total capacity Max (Mb/s) 768
Remotes Total capacity Avg (Mb/s) 460,81 Remote price $7.000 $1.000 $6.500 Price per MHz $3.000
48 Remotes price $300.000 $48.000 $300.000 Mb/s Required SCPC 768
CapEx MHz Required SCPC 256
$600.000 $348.000 $350.000 Mb/s Required Legacy HUB 368,64MHz Required Legacy HUB 122,88
OpEx Mb/s Required SKYWAN 115,2
Monthly OpEx $768.000 $368.640 $137.583 MHz Required SKYWAN 45,861
TCO TCO Year 1 $9.816.000 $4.771.680 $2.000.996TCO Year 2 $19.032.000 $9.195.360 $3.651.992TCO Year 3 $28.248.000 $13.619.040 $5.302.988TCO Year 4 $37.464.000 $18.042.720 $6.953.984TCO Year 5 $46.680.000 $22.466.400 $8.604.980
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The Real Pay as you Grow
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TCO Year 1 TCO Year 2 TCO Year 3 TCO Year 4 TCO Year 5$0
$5,000,000
$10,000,000
$15,000,000
$20,000,000
$25,000,000
$30,000,000
$35,000,000
$40,000,000
$45,000,000
$50,000,000
SCPCLegacy HUBSKYWAN
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Agenda
Efficient
High Quality
Flexible
Future Proof
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Network Architecture - GSM
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Network Architecture - GSM
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Network Architecture - GSM
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Network Architecture - UMTS
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Network Architecture - LTE
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Legacy HUB Topology - Star
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SKYWAN Topology - Flexible
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Use Cases
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Use Cases – cont‘d
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Agenda
Efficient
High Quality
Flexible
Future Proof
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High Quality
MOS: 4.0
Jitter: 4ms
OCXO ± 0.001ppm
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Agenda
Efficient
High Quality
Flexible
Future Proof
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Small Cells
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Open BTS
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02.05.2023 | Page 35 |
Software Defined Core Network
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Vodafone Foundation Instant Network
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Core Network – where to put it?
BSS / NSS
USRP
Skywan 5G
BSS / NSS
USRP
Skywan 5G
BSS / NSS
USRP
Skywan 5G
BSS / NSS
USRP
Skywan 5G
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Local Switching – Impossible with Legacy HUB
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Local Switching with SKYWAN
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Local Switching OpEx
Legacy HUB:(0,02 x 62,6) x 2 + (0,9 x 62,6) x 4 = 227,9 Mb/s
SKYWAN:(0,02 x 62,6) x 2 + (0,9 x 62,6) x 2 = 115,2 Mb/s
= 76 MHz
= 45,8 MHz
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SKYWAN 5G
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The Intelligence is in each single modemNo external equipment necessary for operation
Increased throughput just by adding/combining units
The ideal modem for Cellular Backhauling
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