Network Operator Presentation

1
IP Real-Time Traffic Management Across Shared
Satellite Networks
Rash Jhanjee, Sales Manager MEA Nov 8th 2003
2
Our Value
In 2001-02, teleport operating companies saw a
spike in their Internet and IP transport
business, with the average operator generating 16
percent of revenues from IP in 2002, compared
with 3 percent in 1998! -SatNews iDirect
Can Help Your IP Growth Strategy by Providing

• Lowest Cost of Ownership
• Lowest Operating Cost
• Low Capital Cost
• Unparalleled Configuration Flexibility
• Access Multiple Satellites from Single Hub
• Five Function Remote
• Most Efficient Use of Transponder Capacity
• 1.2 Carrier Spacing (14 Gain)
• Turbo Product Codes (20 Gain)
• Discontiguous Transponder Assignment
• Enterprise Class IP Application Extension
• VoIP
• QoS
• cRTP (50 Gain)
• Highest Data Quality

3
Market Presence
iDirect Technologies Fills The Gap Between
Narrowband and Dedicated SCPC
Market Type
Access Method
Topology
Functions
Data Rates
MRC
4
Who is iDirect Technologies?
iDirect Technologies is A Growing High-Technology
Company That Produces Innovative IP-Based
Satellite Communication Products

• Enabler of Fast, Easy and Efficient Broadband IP
  Anywhere!
• Products Designed to Support Enterprise IT
  Communications Strategy Leveraging Performance,
  Bandwidth Efficiency While Providing Cost
  Improvements
• Global Partners Provide Rapid Deployment of
  Consistent, Secure, Business Class IP Access to
  All Your Business Locations
• We Have Overcome Many Technical Hurdles That Have
  Plagued Previous Satellite Technologies Such as
  The Effects of Latency and Satellite Bandwidth
  Inefficiencies

5
Traditional Satellite Issues
Legacy VSAT Service
iDirect Enabled Solution

• Ethernet-like Speed Anywhere
• Up to 9.1Mbps downstream
• Up to 4.2 Mbps Upstream

Narrow Band, Low Speed

• Shared vs. Dedicated
• Unique bandwidth allocation algorithms greatly
  improves bandwidth efficiency and reduces monthly
  telco costs

Expensive Connectivity

• High Network Availability
• Superior error correction techniques eliminate
  weather related performance degradation
• Automatic End-to-End power control

Unreliable in Bad Weather

• Enterprise Class Solution
  
• Up to 98 channel throughput
• Application QoS
• cRTP

Performance Constraints

• Fully Integrated Enterprise Class
• Single Box Solution
• (modem, router, QoS, Encryption,
  Acceleration)
• Fully Managed Solution

Costly to Manage
6
SCPC vs. Shared IP Transmit Traffic Patterns
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Advantages of Shared Bandwidth Networks

• Shared 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
• Important to Network Operators
• More Customers Per Transponder
• More Cost Effective Bandwidth Utilization
• 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

8
Real Time Traffic Management (RTTM) Feature Set
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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)

10
iDirect Technologies QoS Features

• Application QoS
• Enables real-time identification, classification,
  and prioritization of data traffic
• Recognizes differing traffic types
• Real Time Traffic (e.g. VoIP packets) given
  highest priority within data transport stream
• Group QoS - Prioritize real-time traffic over
  non-real time traffic across shared satellite
  bandwidth medium
• Allocates traffic bandwidth for each remote
  appropriately
• Can be coupled with CIR to guarantee service at
  the network level

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Typical Teleport Configuration
Private Network
NMS Server Spare
Control Ethernet Segment
Corporate VPN
5IF Hub Chassis
RF
UpLink
Internet/Backbone
Router
Router
ProtocolProcessors
iDirect Equipment
NMS GUI (Configuration Monitoring)
Up to 20 Transponders
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Remote Configuration
Remote Site

Video
iDirect Components
PCs
10/100 Mbps Ethernet Switch
L-Band IFL
VSAT Antenna
LAN
10/100Ethernet
NetModem II Plus
SIP Phones
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iDirect Products
Our VSAT Products Support Enterprise Customers
Application Requirements

• Easy Over-the-Air Upgrades
• One Box Solution
• Feature Rich

NetModem II Plus

• 5 in 1 Solution
• IP Router
• Satellite Modem
• TPC Accelerator
• QoS
• Link Encryption

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3DES Link Encryption Security
Headquarters LAN/WAN
Remote Site LAN
3DES Link Encryption
Hub NetModem
NetModem II
IP Router
Ethernet Switch
Protocol Processor
Secure VPN
IP Router
Internet
Private IP Networks
Enterprise Security without Affecting Performance
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Enterprise Class Application Support
16
iDirect Enabled Partners
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Summary

• Enterprise networks continue to expand and real
  time applications such as voice / video are a
  requirement for virtually every network
  implementation.
• The solution is either to implement costly
  dedicated bandwidth (SCPC) or to build cost
  effective shared networks that have been designed
  from the ground up to support latency sensitive
  real time data.
• This cannot be a simplistic check mark QoS
  feature, but a robust set of features that are
  required as network-wide conditions cause
  bottlenecks and additional latency.
• Detailed Understanding of not only Satellite but
  IP as well, is Imperative to Meet the Needs of
  the Customer

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Questions/Closing
Please contact the following individuals with any
questions or requests
Rash Jhanjee Sales Manager MEA iDirect
Technologies 44 7961 017510 rjhanjee_at_idirect-tech
.com
Joshua Cohen New Business Development
Manager iDirect Technologies 10803 Parkridge
Boulevard Reston, VA 20191 703.648.8174 jcohen_at_id
irect-tech.com

• - or -

www.idirect-tech.com
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Back-Up Slides
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QoS and Prioritization Features

• Traffic prioritization can be performed using
• Destination IP Address
• Source IP Address
• Destination TCP Port Number
• Source TCP Port Number
• Diffserv and ToS Bits
• Protocol (TCP, UDP, RTP, IGMP, ICMP)
• Configurable Queue Lengths For Each Service Level
• A percentage of bandwidth assigned to each
  service level
• Configurable drop policy
• CIR can be configured on the upstream
• Traffic can be rate limited in both directions

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Network Aware Group QoS

• Hierarchical Prioritization Capability
• Truly the Most Flexible QoS Capability
• The Most Comprehensive Prioritization Capability

Prevents non real time traffic from one remote
impacting Real Time Traffic on a different and
unrelated remote
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Group QoS

• Hierarchical Prioritization Capability
• Most Flexible QoS Capability in Industry
• Most Comprehensive Prioritization Capability

rt - Real-time Traffic (e.g. VoIP) nrt -
Non-Real-time Traffic (e.g. FTP)
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Dynamic CIR

• Allows Operators to set true Committed
  Information Rate (CIR) values for remotes in the
  upstream directions.
• Allows support for CIR Based SLAs without locking
  up bandwidth when not required
• Based on statistical analysis, oversubscribe
  their networks.
• If demand is less than CIR, only the actual
  demand is granted
• Capable of indicating certain QoS service levels
  trigger a CIR request

24
Timeslot Feathering Allocation

• Jitter is a big problem with VoIP and TDMA
  Networks
• Delay Variation has to be minimized for proper
  operation

Delay
Significant variation in delay causes jitter.
VoIP Packets
VoIP Packets
VoIP Packets
Frame 1
Frame 2
Frame 3
Delay
Minimal variation in delay significantly reduces
jitter.
25
SAR Segmentation and Reassembly

• Ensure minimal delay for high priority, small
  packet traffic
• Fragmentation and Interleaving allows for minimal
  delay in dequeuing

FTP Packets (1500 Byte)
2
3
4
5
1
Dequeue
RF Out
1
a
b
The Large FTP Packet will delay voice in a
congested state
i
j
a
b
c
d
e
f
g
h
VoIP Packets (60 Byte)
QoS Distributor
FTP Packets (1500 Byte)
5
6
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
Dequeue
RF Out
1
a
b
c
d
1
As packets are divided into equal sized packets,
a voice packet has to wait a maximum of one burst.
f
g
h
i
j
k
l
m
a
b
c
d
e
VoIP Packets (60 Byte)
SAR
QoS Distributor
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Compressed RTP

• Allows for a more efficient use of satellite
  bandwidth
• Benchmarks
• 11.5 Kbps per voice call with G. 729 compression
• 8.5 Kbps per voice call with G.723a compression
• Overall VoIP calls using cRTP achieves a 50
  savings in bandwidth.

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Turbo Product Codes / FEC

• Iterative process used to decode packets with
  missing information
• Turbo Product Codes
• Maintains the reliability of the transmission
• Increases the signal to noise ratio
• Lower bit error rate (10-9) fiber quality
  critical for maintaining IP performance
• More performance with lower power (bandwidth
  limited)
• Permits Uplink Power Control to maintain the SNR
  over a wider range of environmental conditions

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Turbo Product Codes / An Example

• Less power required to maintain Optimal TCP
  Performance
• Additional available power Combined with Auto
  Uplink Power Control allows system to
• maintain signal strength and maintain optimal
  TCP performance

Other RSV
Shannon Limit
iDirect
Standard Network Operating Range
1 dB implementation margin assumed