Transcript IP Real-Time Traffic Management Across Shared Satellite Networks

IP Real-Time Traffic Management Across Shared Satellite
Networks
Rash Jhanjee, Sales Manager MEA
Nov 8th 2003
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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
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Market Presence
iDirect Technologies Fills The Gap Between Narrowband and Dedicated SCPC
i D IRECT
Market Type
Narrow Band POS
Broadband
SCPC
Access Method
Slotted Aloha
D-TDMA
Dedicated SCPC
Topology
Narrowband
Shared
Dedicated
Functions
Transaction/POS
Enterprise Applications
Telco/Video Broadcast
Data Rates
16K – 128K Service
128K – 4.2Mb
1Mb – 44Mb
MRC
$120-$300
$400-$3,000
$8,000-$50,000
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Traditional Satellite Issues
Legacy VSAT Service
iDirect “Enabled” Solution
Ethernet-like Speed Anywhere
Narrow Band, Low Speed
Up to 9.1Mbps downstream
Up to 4.2 Mbps Upstream
Shared vs. Dedicated
Expensive Connectivity
Unique bandwidth allocation algorithms greatly
improves bandwidth efficiency and reduces
monthly telco costs
High Network Availability
Unreliable in Bad Weather
Superior error correction techniques eliminate
weather related performance degradation
Automatic End-to-End power control
Enterprise Class Solution
Performance Constraints
Up to 98% channel throughput
Application QoS
cRTP
Fully Integrated Enterprise Class
Costly to Manage
Single Box Solution
(modem, router, QoS, Encryption, Acceleration)
Fully Managed Solution
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SCPC vs. Shared IP – Transmit Traffic Patterns
Single User Traffic Pattern (SCPC)
500
450
400
Inefficient and Costly Use of
Satellite Bandwidth because
IP Traffic Is Bursty and
Asynchronous.
350
Data
Rate
300
250
200
150
100
50
0
Time
Multi-User Traffic Pattern
500
450
400
Data
Rate
Efficient but requires mechanisms to
differentiate real time traffic from
non-real time traffic to ensure
proper application performance.
350
300
250
200
150
100
50
0
Time
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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
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Real Time Traffic Management (RTTM) Feature Set
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Outroute
Group QoS Ensures proper priority across shared medium
Inroute
3
1
7
QoS, SAR, CIR
on the outroute
CIR (Static or Dynamic, application Triggered)
2
5
75
NM-1
4
Feathering of Timeslots minimizes jitter affects
Hub
2
SAR, Fragments and Interleaves to ensure proper dequeuing
NM-1
1
6
QoS identifies, classifies and prioritizes traffic
cRTP reduces overall
bandwidth required
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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 (DTDMA)
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)
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Typical Teleport Configuration
Private
Network
NMS
Server &
Spare
Control
Ethernet
Segment
Corporate
VPN
5IF Hub
Chassis
Redundant
Architecture
Internet/
Backbone
Router
RF
UpLink
1.
Router
2.
3.
Protocol
Processors
4.
NMS GUI
(Configuration
& Monitoring)
iDirect Equipment
5.
Up to 20 Transponders
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Remote Configuration
Remote Site
Video
Network
Operator
Partner
PCs
iDirect Components
10/100 Mbps
Ethernet
Switch
L-Band
IFL
VSAT
Antenna
10/100
Ethernet
LAN
NetModem II Plus
SIP
Phones
Simple Deployment…
•Integrated, single box connection to the LAN
•No power needed at VSAT Antenna
•Centrally Managed
•Enable Broadband Connectivity!
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iDirect Products
Our VSAT Products Support Enterprise Customers Application Requirements
Easy Over-the-Air Upgrades
NetModem II Plus
One Box Solution
Feature Rich
Broadband
TDMA/iSCPC
Turbo Code FEC
QoS/Firewall
3-Way Handshake
10/100 Mbps LAN
Variable Data Rates
L-Band
DNS Caching
C/KU/Band
TCP/IP Router
Rate Shaping
3DES Chipset Onboard
TCP Acceleration
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
NetMode
m
NetModem II+
IP Router
Protocol
Processor
Secure
VPN
Ethernet
Switch
IP Router
Internet
Private IP Networks
Enterprise Security without Affecting Performance
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Enterprise Class Application Support
End Customer Type
Financial Services
Credit Card
Oil & Gas
Application Description &
Network Size
Access secure transactions for affiliated sites.
122 Remotes/2 Hubs
Access secure transactions for financial transactions at each site.
80 Remotes/2 Hubs
Transmission of real-time data & voice from remote trucks in field and offsite drilling
rigs.
50 Remotes/3 Hubs
Military
Provide Army units maintaining force readiness with access to stock databases
worldwide.
27 Remotes/1 Hub
Medical
Insurance
Provide communication of real-time data for emergency personnel in field.
32 Remotes/1 Hub
Provide solution that delivers immediate connectivity at catastrophic sites for
insurance claims processing and voice communications.
20 Remotes/1 Hub
Carrier
Supplement connectivity options allowing access anywhere in the world onto their
MPLS backbone network.
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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
Joshua Cohen
Sales Manager MEA
New Business Development
Manager
iDirect Technologies
iDirect Technologies
+44 7961 017510
10803 Parkridge Boulevard
[email protected]
Reston, VA 20191
703.648.8174
[email protected]
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
LAN Traffic
Destination IP Address
Source IP Address
Destination TCP Port Number
Service
Queues
Source TCP Port Number
Diffserv and ToS Bits
Protocol (TCP, UDP, RTP, IGMP, ICMP)
Configurable Queue Lengths For Each Service Level
Satellite
Network
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
Network
Inroute 1
Prioritization
rt
Inroute 2
nrt
rt
Inroute 3
nrt
rt
Inroute 4
nrt
rt
nrt
Prevents non real time traffic from one remote impacting
Real Time Traffic on a different and unrelated remote
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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
Ded. TS
Total Bandwidth Available – 64K
NM1 – 16K CIR
Dynamic CIR Allows
Dynamic Allocation of
BW if not being used
NM1 – Dynamic Allocation
since space available
NM1 – Total Capacity
Available Since others are
not active
NM1 – 16K
NM2 – 16K
NM3 – 16K
NM4 – 16K
CIR Per Remote
Rapid Ramp-up time
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Timeslot Feathering Allocation
Jitter is a big problem with VoIP and TDMA Networks
Delay Variation has to be minimized for proper operation
VoIP Packets
VoIP Packets
Frame 1
VoIP Packets
Frame 2
Delay
Frame 3
Delay
Significant variation in delay causes jitter.
VoIP Packets
Frame 1
VoIP Packets
Frame 2
VoIP Packets
Frame 3
Delay
Minimal variation in delay significantly reduces jitter.
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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)
5
4
3
2
1
RF Out
Dequeue
j
i
h
g
f
e
d
c
b
b
a
1
The Large FTP Packet
will delay voice in a
congested state
a
VoIP Packets (60 Byte)
QoS Distributor
FTP Packets (1500 Byte)
6
4
5
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
RF Out
Dequeue
m
l
k
j
i
h
g
f
e
d
c
b
a
VoIP Packets (60 Byte)
SAR
QoS
Distributor
1
d
c
b
a
1
As packets are divided
into equal sized
packets, a voice packet
has to wait a maximum
of one burst.
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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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