Voice over IP in a SharedSatellite Environment

Dean Griffler, Vice President of Sales, AmericasiDirect Technologies

Reston, Virginia

February 2004

Voice over IP in a SharedSatellite Environment

Dean Griffler, Vice President of Sales, AmericasiDirect Technologies

Reston, Virginia

February 2004

Ubiquitous Worldwide Broadband Coverage

Rapid Deployment of Consistent, Secure, Business Class IP Access to

Any Business Location

Enterprise Class Communications

Consistent with terrestrial based IP infrastructure

Scalable, Reliable, Adaptable

Highest Quality of Service

Terrestrial class Quality of Service

Have Overcome Many Technical Hurdles That Have Plagued Previous

Satellite Technologies Such as The Effects of Latency, Real Time

Requirements and Bandwidth Inefficiencies

Provides for Secure Communications

TDMA Technology Provides Broadband IP Solutions To Enterprises Anywhere in the World

TDMA Value

Market Presence

MRC

Data Rates

Functions

Topology

Access Method

$120-$300

16K – 128K Service

Transaction/POS

Narrowband

Slotted Aloha

Narrow Band POS

Market Type

$400-$3,000

128K – 4.2Mb

Enterprise Applications

Shared

D-TDMA

Broadband

$8,000-$50,000

1Mb – 44Mb

Telco/Video Broadcast

Dedicated

Dedicated SCPC

SCPC

TDMATDMA Fills The Gap Between Narrowband and Dedicated SCPC

SCPC vs. Shared IP – Transmit Traffic Patterns

Multi-User Traffic Pattern

0

50

100

150

200

250

300

350

400

450

500

Time

DataRate

Efficient but requires mechanisms to differentiate real time traffic from

non-real time traffic to ensure proper application performance.

Single User Traffic Pattern (SCPC)

0

50

100

150

200

250

300

350

400

450

500

DataRate

Time

Inefficient and Costly Use of Satellite Bandwidth because

IP Traffic Is Bursty and Asynchronous.

Advantages of Shared Bandwidth NetworksShared Bandwidth Systems Gaining Favor– Highly Efficient and Cost Effective– But Challenging for Real Time Traffic

• Jitter• Delay• Packet Loss• Oversubscription (Bandwidth “Starving”)• Non-differentiated Packets (IP is IP) • Interference From Large Burst Data Traffic

Well Suited to Burstable Nature of IP Traffic

But, Controlled and Managed Access is Required for Real Time Traffic– Traffic Classification and Prioritization– Queuing Methods

Real Time Traffic in a Shared Environment

Requires a robust feature set necessary for the reliable transport of real time traffic– Deterministic Transport – Deterministic Time Division Multiple

Access (D-TDMA)– QoS (Prioritization of packets)

• Application QoS• Group QoS

– Dynamic CIR (Absolute guarantee)– Feathering Timeslot Allocation (Minimize Jitter)– Segmentation and Reassembly of IP Packets (Minimize Delay)– Compressed-RTP – cRTP (Efficiency)– TPC / Uplink Power Control (Reliability)

Real Time Traffic Management (RTTM) Feature Set

Hub

NM-1

OutrouteInroute

1 2 5 75

NM-1

66cRTP reduces overall bandwidth required

QoS identifies, classifies and prioritizes traffic11

SAR, Fragments and Interleaves to ensure proper dequeuing22

Feathering of Timeslots minimizes jitter affects44

CIR (Static or Dynamic, application Triggered)33

55 Group QoS Ensures proper priority across shared medium

77QoS, SAR, CIR on the outroute

Remote Site Configuration

Remote SiteRemote Site

10/100 MbpsEthernet Switch

Video

VoIPPhones

10/100Ethernet

VSAT Antenna

L-BandIFL

NetworkOperatorPartner

Simple Deployment…Simple Deployment…

• Integrated, single box connection to the LAN

• No power needed at VSAT Antenna

• Centrally Managed

• Enable Broadband Connectivity!

Simple Deployment…Simple Deployment…

• Integrated, single box connection to the LAN

• No power needed at VSAT Antenna

• Centrally Managed

• Enable Broadband Connectivity!

PCs

IP RouterQoSTPC AcceleratorSatellite Modem3DES Security

End-to-End Network ArchitectureC or Ku-Band Satellite C or Ku-Band Satellite

Network Operator Teleport Network Operator Teleport

LAN Switch

VoIP Phone

Remote Client Site Remote Client Site

Router

Internet/ Leased

Line/MPLS

Enterprise HQ

LAN Sitch

VoIP Phone

Remote Client Site Remote Client Site

LAN Switch

VoIP Phone

Remote Client Site Remote Client Site

VoIP Phone

Remote Client Site Remote Client Site

Applications – VoIP

Enterprise Applications

Voice over IP Application Prioritized and Protected End-to-End

5IF Hub Chassis

VoIP Phone

Private or ManagedService

Seamless Wi-Fi and other IP-Infrastructure Integration

NetModem II+

5IF Hub Chassis

VoIP Phone

Applications – WiFi (802.11x)

Enterprise Applications

MNC Headquarters

Internet Dial

MNC Supplier

Roaming User

Public DomainInternet Direct

IPSec Gateway

Secure Gateway

ServerHosting

ApplicationHosting

MessagingRegional Office

Private Domain

IP VPN(MPLS based)

Private Dial

Solution OptionsFixed

Antenna, BUC, LNB, Cable, Mounts

Fixed Mobile

Ease of configuration and setup

Maritime Mobile

Works with Stabilized Antenna

Swift Deploy

Rapid Setup

Ruggedized Cases

Case StudiesProvides contingency communications services to the Army and other DOD services

For Operation Iraqi Freedom, Tamsco provides satellite connectivity network to 52 sites Army’s Coalition Forces Land Component Command CFLCC) in Kuwait (operating for Iraq) for logistics tracking of equipment and parts.

Stratos, provides global communications services and solutions worldwide

StratosITek, provides next generation all-digital global connectivity.

Supports a range of communications solutions, including Voice-over-IP, file and database server access, Internet, video conferencing, and e-mail.

“Stratos specializes in providing enterprise customers operating in remote locations with a variety of superior wireless IP, data, and voice satellite solutions.  We are excited about the ability to offer our new StratosITek technology to our customers,” said Jim Parm, Stratos CEO.  “We feel that organizations of any size will be able to realize significant benefits from this global solution.”

  

Summary

Enterprises are increasingly demanding the same capabilities for their “off network” sites as those that can effectively ride on their terrestrial infrastructure.

Broadband-based satellite solutions that are optimized for TCP-IP offer the capability for providing voice, data, and video services to these sites.

While such capability has traditionally been provided with dedicated bandwidth (CIR’s), the cost of such services more often outweighed the need / benefit of the solution.

Shared, oversubscribed satellite services, taking advantage of the bursty, asynchronous nature of IP, can provide such services in a cost effective manner.

However, in order to provide enterprise-class voice (as well as other real time solutions) on such a network, requires a thorough understanding and implementation of a robust set of real time management features.

Such services, based on the IP-based iDirect technology are available today to provide such a solution.