© 2018 Comtech EF Data Corp. 1

Reliability and The Pathway to

Performance

Raised Expectations

• Increasing customer expectations• Expecting “terrestrial-like” experience over satellite backhaul, Download

throughput performance requirements evolving from a few 100 kb/s-Mb/s

to several 10 Mbps (Fast Broadband Internet Access, LTE).

• Fibre doesn’t break when it rains.

• Blockages? RF sizing? Why is that my problem?

• Users don’t care satellite is different, nor should they have

to, but …

– Blockages are real and need managing.

– Physics, gets in the way.

– Web sites complexity has grown: 4 years ago, average website size

was 750kB and consisted of 20-30 objects. Today, average website in

2MB+ and consist of 200+ objects across dozens of domain/hosts.

Optimisation matters.

2

The Pathway To Performance

• Involves a balanced mix of right sized products

including:

CDM 760 with up to 1.4Gbit/sec

3

Up to 150Msps

Up to 256APSK

With Carrier in carrier

>350,000 packets per second

HTS, GEO and MEO Operation

For the highest performing, most efficient point to

point network

The Pathway To Performance

• Involves a balanced mix of right sized products

including:

Heights Hpro with up to 250x200Mbit/sec

4

For the highest performing, highly responsive

point to multipoint and full mesh networks

Innovative Waveforms

• H-DNA, 3rd generation inbound waveform

delivering

– Immediately adapts to changing

environments

– Delivers superior efficiency & Quality of

Experience

– Instantly assigns capacity based on network-

wide demand

– Intelligently utilizes total network bandwidth

at all times

– Optimised for guaranteed delivery of mission

critical applications

5

The Pathway To Performance

6

FX-4010c

FX-1010cFX FX5020c

FX-1005e

Scalable Wan Optimisation Products

Satellite centric solutions optimizing the user experience and eliminating wasted bits

Use Case: CEFD CDM760

Trunking Modem with ACM

7

Stampede

FX QoS/PEPCDM-760

(also applies to CDM-625)

250ms

Feedback

TX Capacity

• Constant monitor of the CDM-760 TX WAN capacity

ensures QoS is enforced and maximize throughput: The FX shapes the traffic to the actual modem data rate.

Tracks ACM changes in REAL TIME

Traffic is prioritized and shaped to predefined bandwidths by

priority ensure that the right traffic is carried on the link and

SLAs is met and QoE expectation satisfied.

Performance and Reliability Caps

• RF sizing

• Satellite performance and Amount of Spectrum

• Licencing & Regulation

• Enviroment

8

Scaling to the Gb/s and beyond

Introducing the HX Load Balancer

• Scaling satellite link capacity

– Step around the constraints of transponder size, RF capacity and modem

throughput

• Delivering High availability

– Eliminate the single points of failure

9

Reliability, Must Not Forget The Failure

Modes

10

Satellite clear in this direction,

all good

X

Rig heading changes, obstruction,

no comms

Performance capped by the environment and solution

Load Balancing Delivers Reliability

11Eliminates the Single Point of Failure

Load Balancing for Performance and

Reliability

12The Building Blocks for Reliable Performance

Eliminates the

performance ceiling

Supporting Materials

13

Comtech WANOp Solution

Key Benefits & Differentiators

Superior WANOp Performances

• “Pay-as-you-grow” TCP sessions based licensing

– No limitation on bandwidth / throughput

• Superior Turbostreaming© Performance Enhancement Proxy [PEP]

– Faster web browsing and a better user experience

• Intelligent DNS Caching

– More efficient than Client’s PC or smartphone web browser cache,

– Run through tunnelled end-user traffic (MPLS VPN, 4G LTE & 3G GTP)

• “Fill-the-Pipe”: Modem driven real-time dynamic traffic shaping

– always match the available baseband transmit link capacity of the modem

• Operate on ISP, VPN and Mobile (4G) traffic concurrently

14Comtech EFData Proprietary and Confidential Information – June 2017

Comtech WANOp Solution

Key Benefits & DifferentiatorsSuperior Network Operation

• 100% Layer-2 / Layer 3 Transparency “PEP-on-a-wire”:

– “one-touch” simple configuration,

– customer network & traffic transparency (VLANs, MPLS, IP routing,…)

– support for Jumbo frames

• Multi-Gigabit Scalability that meets new HTS satellite capacity

– Wide range of integrated and standalone appliances,

– HX load balancer scales satellite link speed and PEP capacity up to 5 Gbs

• High Availability Carrier Grade Solution

– Fail to Wire

– System Redundancy

– End-to-end path redundancy

• State of the Art Service Provider NMS (NetVue)

– Integrated management with Comtech’s satcom products (RF, modems)

15Comtech EFData Proprietary and Confidential Information – June 2017

• TCP acceleration (PEP) breaks the long latency end-to-end TCP control loops into

several control loops by intercepting and relaying TCP connections within the network.

• Comtech patented Turbostreaming© solution also adds specific mechanisms (like Fast

Start, larger buffer, and TCP session control bandwidth management) to mitigate the

satellite link long latency and effect of packet loss / retransmissions over satellite.

TCP Acceleration (PEP) [Performance Enhancement Proxy]

With TCP Acceleration – mitigates satellite link latency for TCP applications

Comtech PEP enables TCP acceleration (PEP) across any Layer 2/3 protocol stacks, including MPLS/VPN and 4G/LTE backhaul

Comtech EFData Proprietary and Confidential Information – June 2017 16

Local TCP session Local TCP session

VSAT

Comtech Turbostreaming©

Internet

End-User

Client

Server

Without WANOp

Transmission errors

Throughput slow down

About Comtech Turbostreaming©

PEP Solution• Standard PEP

– Most vendors use SCPS-TP* implementation. SCPS-TP is good for single long file

transfers (FTP) but not designed for today’s “busy” web browsing where there are

many objects to download (short file transfers): each object download on a web page

has to go through a 2 or 3-Way Handshake (= 3 x round trip time – nearly 2seconds)

before any bytes start being transferred

– SCPS-TP implementation relies also on over-sized buffer window size (4 MB up to

16MB) to achieve high throughput FTP file transfer, resulting in a huge buffer being

held “in the sky”, which is an issue in case of packet loss (buffer re-transmission)

• Comtech’s patented TurboStreaming PEP– Comtech’s TCP PEP Persistency solution reduces time to first byte object download

by 50% allowing faster web page display.

– Comtech’s TCP PEP Multiplexing solution allows to accelerate FTP file transfer and

object download up to 5 times while keeping buffer size “reasonable” (2 MB).

– See also: https://www.comtechefdata.com/files/articles_papers/WP-

QoE%20for%20LTE.pdf

17

Note (*): SCPS-TP is an enhanced TCP protocol stack that has been standardized by the US DoD several years ago.

Comtech EFData Proprietary and Confidential Information – June 2017

Use Case: CEFD CDM760

Trunking Modem with ACM

18

Stampede

FX QoS/PEPCDM-760

(also applies to CDM-625)

250ms

Feedback

TX Capacity

• Constant monitor of the CDM-760 TX WAN capacity

ensures QoS is enforced and maximize throughput: The FX shapes the traffic to the actual modem data rate.

Tracks ACM changes in REAL TIME (updated 4 times/second)

• Traffic is prioritized and shaped to predefined

bandwidths by priority ensure that the right traffic

is carried on the link and SLAs / KPIs are met.

HX Mode of Operation (1/2)

• WAN load balancer (with or without PEP)

19Comtech EFData Proprietary and Confidential Information – June 2017

HX Mode of Operation (2/2)

• Integrated PEP and WAN load balancer

• PEP Scaler

20Comtech EFData Proprietary and Confidential Information – June 2017

© 2018 Comtech EF Data Corp.

Comtech EF Data

2114 West 7th Street

Tempe, AZ 85281

USA

Tel +1.480.333.2200

FAX +1.480.333.2540

sales@comtechefdata.com

www.comtechefdata.com