Comtech - Enabling 3G/HSPA Satellite Backhaul - Leonardo Gil Alvares

1. © 2014 Comtech EF Data Corporation
SSPI Day, October, 2014
Enabling 3G/HSPA Satellite Backhaul
Leonardo Gil Alvares
Sales Engineer
lalvares@comtechefdata.com

2. Mobile-Cellular Subscriptions
• # of mobile-cellular subscriptions worldwide is approaching population
on earth -> will reach almost 7 billion by end of 2014
2
Source: 2014
Total & Per 100 Inhabitants, 2005-2014 By Region, 2014

3. Global Mobile Data Traffic
• Global mobile data traffic will increase nearly 11-fold between 2013 and 2018
• Mobile network connection speeds will increase two-fold by 2018
• Over 2/3 of the world’s mobile data traffic will be video by 2018
3
Source: Cisco’s “Visual Networking Index: Global
Mobile Data Traffic Forecast Update,” 2014
Exabytes per Month

4. 4
New Era of “Data-Centric” Backhaul
for Telco/Celco

5. A Widening Gap Between Revenue &
Traffic Driven by Data Usage
• As MNOs migrate from 2G to 3G and 4G, their
offerings shift from traditional voice-dominant to
data-dominant services
• Many multimedia services require significant
bandwidth
• Traffic growth is much higher than the
corresponding growth in revenues
• The rising traffic needs coupled with stagnant/
declining ARPU remains a major concern for
MNOs
– Monthly ARPU
§ 2G -> $5–15
§ 3G -> $10-25
• Operator competition and the need to target
populations with lower purchasing power
should put continued pressure on ARPU
Source: 2013

6. © 2014 Comtech EF Data Corporation
Satellite Capacity Options
for Mobile Backhaul:
The Case for HTS and the Use of
Ka-, Ku- and C-Band

7. Global Demand for Bandwidth
7Source 6/12:Comtech EF Data Proprietary

8. Impact of HTS
• Some HTS designs are not optimized for the
topology of cellular networks
– Mobile operators using satellite backhaul likely prefer to
do one hop over satellite to:
§ Optimize latency and/or
§ Due to regulatory obligations – needing need to uplink and
downlink traffic within the country without passing through
an international gateway
– Most HTS systems were designed to optimize data
rates for data usage (for consumer broadband or
enterprise networks)
§ Traffic patterns of cellular backhaul may not have been fully
taken into account
– Some new satellites are highlighting the
loopback capability as a competitive advantage
Comtech Proprietary and Confidential 8
Source: 2013

9. 9
• Ka- vs. Ku-Band: Pondering Performance
Side-by-side technical and cost comparisons of Ka- and Ku-Band HTS
solutions show advantages and disadvantages for both system solutions.
Ka = +BW vs. Ku = +Availability
1. A typical Ku-band rain fade rate is
approximately 1dB/sec while the
fade rate in Ka-band is significantly
higher at around 3-5 dB/sec.
2. For a possible Ku-band attenuation
of about ~ 4 - 6 dB, under similar
conditions Ka-band attenuation
range could be ~ 12 – 24 dB
3. Compensating for Ka-band
attenuation with added Power
(Satellite& Ground), can be costly
4. The challenge is to balance Bit/
Hz vs. Power/Availability vs.
Cost

10. SatCom Infrastructure Technologies That
“Extend” Bandwidth & Reduce Expenses
Pillars of Optimizing Throughput
Mod/Cod
ROF
Carrier-in-
Carrier
Technology
Adaptive
Coding and
Modulation
WAN/RAN
Optimization
10

11. SatCom Infrastructure Technologies That
“Extend” Bandwidth & Reduce Expenses
Pillars of Optimizing Throughput
Mod/Cod
ROF
Carrier-in-
Carrier
Technology
Adaptive
Coding and
Modulation
WAN/RAN
Optimization Without DoubleTalk
Carrier-in-Carrier
With DoubleTalk
Carrier-in-Carrier
11

12. SatCom Infrastructure Technologies That
“Extend” Bandwidth & Reduce Expenses
Pillars of Optimizing Throughput
Mod/Cod
ROF
Carrier-in-
Carrier
Technology
Adaptive
Coding and
Modulation
WAN/RAN
Optimization
0
10
20
30
40
50
60
70
Time
3:10
3:30
3:50
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8:30
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9:30
9:50
10:…
10:…
Mbps
ACM
Operation
and
User
Throughput
User
DR
Avail
DR
12

13. SatCom Infrastructure Technologies That
“Extend” Bandwidth & Reduce Expenses
Pillars of Optimizing Throughput
Mod/Cod
ROF
Carrier-in-
Carrier
Technology
Adaptive
Coding and
Modulation
WAN/RAN
Optimization
13

14. SatCom Infrastructure Technologies That
“Extend” Bandwidth & Reduce Expenses
Pillars of Optimizing Throughput
Mod/Cod
ROF
Carrier-in-
Carrier
Technology
Adaptive
Coding and
Modulation
WAN/RAN
Optimization
0
10
20
30
40
50
60
70
Time
3:10
3:30
3:50
4:10
4:30
4:50
5:10
5:30
5:50
6:10
6:30
6:50
7:10
7:30
7:50
8:10
8:30
8:50
9:10
9:30
9:50
10:…
10:…
Mbps
ACM
Operation
and
User
Throughput
User
DR
Avail
DR
Without DoubleTalk
Carrier-in-Carrier
With DoubleTalk
Carrier-in-Carrier
14

15. Today’s Mobile Backhaul Movement
15
• Today’s “Mobile Access” requirement has shifted from standard 2G
TDM (E1) backhaul to mixed TDM/Ethernet backhaul.
E1 E1 E1Ethernet Ethernet
CDM625A with E1 +
Ethernet SUBMUX
CDM625A with
E1
CDM625A + Memotec CXU
across IP/Ethernet modem
Static BW allocated
regardless of
actual traffic load
Static BW allocated
for each service (no
sharing of satellite
resources)
Single BW defined for both
services with shared access
via QOS. Also, enables
additional BW capability via
ACM since backhaul is
exclusively IP/Ethernet.

16. CDM-625A Performance Efficiency
16
For the CDM-625A : 16-QAM , ROF 5%,
VersaFEC .780.
a) Achieved a BER of 8.6 x 10-9
b) EIRP for Eb/No of 8.2 dB is measured at
17.18 dBW per carrier (the spec is 20 dBW)
c) Occupied BW for the above
modem parameters is 720 KHz

17. © 2014 Comtech EF Data Corporation
Advanced VSAT Solutions
for Mobile Backhaul

18. Advanced VSAT Solutions
• Fully Managed Hub and Spoke network topology
– Shared DVB-S2 outbound
– Dynamic SCPC (dSCPC) Return based on VersaFEC/2
OutBound
DVB-S2 Outbound
dSCPC Pool
(All carrier sizes shown as example only)
Entry
Channel
64 kbps
Dynamic BW Allocation
NetVue Network
Management
Hub
Remotes
18Comtech EF Data Confidential

19. Dynamic SCPC (dSCPC)
• Dynamic SCPC enables remote terminals to share one or more
Bandwidth /Power Pools for return links
• Terminals request bandwidth as needed
– Load Switching is ideal for applications that can take advantage of
available bandwidth
§ Terminal requests/returns bandwidth based on traffic level
– ToS Switching is ideal for applications like video and voice that require
fixed bandwidth
§ Terminal requests/returns bandwidth based on predefined ToS / DSCP
values
• Unused bandwidth is returned to the pool and is available to other
users
19
Forward Link
SCPC
Return
1
SCPC
Return
2
SCPC
Return
3
SCPC
Return
4
Entry
Ch.
Return !
Return Link Bandwidth Pool
SCPC Return Links
Dynamically assigned by MS
All Hub-to-Remote traffic on shared
Forward Link
Remotes share Entry
return channel when NOT
assigned SCPC channel
Comtech EF Data Proprietary &
Confidential

20. Integrated Packet
Processing
• Layer 2 / Bridge operation
– Offers true separation of end user traffic
• Strongest IP packet processing
– Mbps ceilings vs. PPS ceilings
• Header & Payload compression
– Eliminates unnecessary info transfer
• Quality of Service (QoS)
– Real-time traffic & other low priority traffic can
seamlessly coexist on the same link without
impacting voice quality or delivery of mission critical
data
20

21. VersaFEC-2
• VersaFEC-2 is highly optimized to provide excellent coding gain
while minimizing latency
– VF-2 long block coding performance is better than DVB-S2/S2X normal
block with 80 to 90% lower latency
– Short block for lower latency
• Supports 32-ARY constellation
– With CnC and 5% Rolloff, CDM-625A can now achieve 8.4 bps / Hz spectral
efficiency
• Large MODCOD set with 18 dB range for ACM
– 38 MODCODs (Long block)
– 36 MODCODs (Short block)
• Optimized constellations
– Circular or Quasi-circular
– Reduced SSPA backoff for higher order modulation
21Comtech EF Data Confidential

22. Comtech Network Planning Tool
22

23. Strategic News
Huawei & Comtech EF Data Announce Launch of
Integrated Satellite Solution Platform for Premium
Enterprise Network Services
• Successful interoperability test of
Advanced VSAT Solutions and
Huawei’s communication
equipment
• Jointly announced the launch of
an integrated satellite network
solution platform for Premium
Enterprise Network services
23

24. Excellent Performance
24Comtech EF Data Confidential

25. Summary
• Comtech EF Data is the acknowledged “Vendor of Choice” for
SatCom Infrastructure Equipment
• Our portfolio includes the highest performance & most efficient
products
• Our solutions:
– Deliver the most value to MNOs and service providers
– Facilitate the delivery of “premium” enterprise services
• We have strategic relationships with key HTS vendors & will expand
on these in the future
25
“Comtech EF Data has worked hard to refine bandwidth
efficiency. We believe that their latest Advanced VSAT
Solutions product line represents a significant step
forward for the company in addressing the shift from
dedicated circuits to shared systems.”
Simon Bull, senior consultant for COMSYS