Main Data Broadband DVB Internet Technologies

1
Main Data Broadband DVB Internet
TechnologiesData and Voice services via Cable
TV networks Mr. Dusan Statelov - CEO
Digital TV
SMART EDUe-Learning
Broadband Internet
IP Telephony
2
Main Data expertise
Internet via Digital Television - DVB
Asymmetric Internet return Land Line, GSM, GPRS,
VSAT etc.Most complex DVB Data solutionsOpen
standard solutions
SMART EDU Interactive e-Learning platform
3
Selected References
4
Broadband homes platform shares
Cable modem technology is 2nd most successful
last mile broadband platform
5
Broadband shares trends estimate
Cable modem will more less keep its current
market share.
6
Broadband homes platform Total
Broadband technologies will substantially grow in
absolute numbers.
7
Digital TV Digital versus Analog
Digital technology presents smaller share versus
analog in Cable TV networks
8
Internet via Cable TV 3 alternatives

• One way via Analog TV vertical or horizontal
  blanking int. a) VBI max 12,5 lines 9.2 kbps
  per line 115 kbps Suitable for Data
  casting (Stocks, weather etc.) b) Horizontal 800
  kbps less stable c) Full field up to 4 mbps
• 2) One way via Digital TV dial-up return path
  HYBRID-NET Up to 56 mbps forward link
• 3) Two-way via Digital Cable Modems 56
  mbps DOCSIS Euromodem EuroDOCSIS

9
IP over cable TV at 8 MHz
10
2) HYBRID-NET
QAM Modul
1-way Amplifiers
RF
Cable TV network
DVB/IP GW Hybrid-Net GW S
QAM DVB receiver board PCI
Router
E1, E2 IP connectivity
Hybrid-Net GW "R" IP connection mngr
INTERNET
11
HYBRID-NET Advantages

• No amplifiers upgrades needed at Cable TV network
  works with even with one-way amplifiers only gt
  INVESTMENT SAVINGS on cable network upgrade
• Forward link up to 56 Mbps
• Less expensive Central Equipment
• Can be operated along with Analog TV channels
• Inexpensive QAM receivers
• Easier customer management
• Unlimited number of customers regarding Head-End
  side
• QUICK implementation

12
IP Multicast Functionality

• Capacity must be taken at
• 1) Backbone
• 2) ISP autonomous network
• 3) End-user connection Last mile

13
Smart_Edu diagram
Feedback from learners
14
PUSH e-mail
PUSH e-mail System serves for downloading e-mails
from remote POP3 servers and their instant
automatic transmission via a one-way link using
UDP/ip interface through any DVB/ip GW (IP
encapsulator). PUSH e-mail System brings to
end-users significant increase in comfort as
incoming e-mails are received automatically
without any intervention from an user side at
significantly higher speeds of DVB link comparing
to ordinary dial-up (up to 20 mbit/s to
end-user). From economic point of view it
eliminates PTT dial-up fees for connections
required just for sending acknowledgment for
received e-mails and checking inbox for incoming
e-mails.
15
PUSH FTP Download Center
PUSH FTP System allows to deliver selected file
in Explorer via a one-way DVB link without any
need for an active return path for acknowledging
received packets.User can choose whether
selected file should be send only to him PRIVATE
(encrypted) or can be published also in Download
Center PUBLIC (unencrypted) for other users to
join this file broadcast.Also user can choose
whether file must be delivered IMMEDIATELY or
LATER (e.g. over night) when there is more free
bandwidth (for lower price).This helps to reduce
charges for dial-up connection and maximizes
benefit of Broadband DVB Internet to
user.Download Center is informing all other
users about ordered files and allows user to join
this transmission and thus turns more expensive
unicast transmission into more effective
multicast de facto on air.
16
TCP/IP Accelerator http pre-fetch
Web Server
MD TCP/ip accelerator serves for improving and
unifying TCP/IP performance for broadband long
latency networks e.g. satellite, DVB-T with GPRS
return path etc. It is based on transparent
TCP/ip connection splitting into 3 TCP/ip
connections. The first part of connection (a)),
there is no need to increase the speed because it
is IP backbone, so RTT is very short.The second
part of connection (b)) can cause significant TCP
performance reduction due to long RTT. (because
of long distance to a geostationary satellite) in
combination with a width of satellite broadband.
TCP/ip accelerator avoids negative reaction of
TCP congestion window by implementing a satellite
specific acknowledgement protocol (a large TCP
Window size, a decreased capacity for the return
link). The third part of connection (c)) over
local LAN, there is short RTT no need for
increasing the speed.
a) TCP/ip connection from Data source to
Central site via IP backbone (short RTT)
MD Accelerator
b) TCP/ip Communication from the Central site
to Terminals via broadband long RTT
link. Effective acknowledgment mechanism, FEC,
compression integrated.
Return link
MD Accelerator
c) TCP/ip communication over local LAN, short
RTT
LAN
Client PC
Client PC
You can download the data sheet
here http//maindata.sk/doc/tcpaccel.pdf

Client PC
Client PC
17
BNMS
Broadcast Network Management Systemserves for
controlling access of users to various
services.BNMS allows for a Service provider to
activate or deactivate services for users. It
has built on Conditional Access (CA) table
containing authorizations for the reception of
specific services (i.e.virtual channels). BNMSs
function is to remotely change CA tables for each
user in order to provide a control over services
received by each user. The CA table can be either
stored in a PC or in the receiving HW (RS 422 ISA
card). Complete CA message contains two types of
tables. One is containg the list of services with
their names and IDs and second one contains list
of user IDs and list of allowed services for each
user. They can be sent either automatically or
manually.
18
Statistics and Billing
The purpose of the Statistics and Billing module
is to gather statistical data for DVB/IP GW
Channels/services and Users for purpose of System
Maintainance and Billing.It is accessible via
PHP web pages to Service Provider as well as for
User. Allows to define billing methods and
pricing for each individual channelGenerates
bills in defined accounting periodsStatistics
can be run at any OS with WEB, PHP support and
MySQLAllows to charge according to traffic
volume, connection time or flat feeAllows to
define 3 Service Time Zones (peak hours) and
define different pricing for individual time
zoneAllows to define peak-free days (where no
peak hours are applied)Generates and sends
passwords for end-users to access Statistics web
pages
19
2) Two-way DOCSIS, Euromodem
2-way Amplifiers
RF
CMTS
Cable TV network
5 MHz
Router
DOCSIS terminal
E1, E2 IP connectivity
INTERNET
20
Cable Modem Advantages

• Independent Last mile network
• VoIP enabling technology
• Can be operated along with Analog TV channels

21
VoIP general issues

• PC to PC
• PC to Phone
• Phone to Phone

Phone to Phone
PSTN
PC to Phone
IP/PSTN Gateway
HFC Network DOCSIS
PC to PC internal
HFC Network DOCSIS
HFC Network DOCSIS
Gatekeeper
PC to PC external
Internet
Germany
USA
Router
China
22
VoIP behaviour standard
General VoIP protocol
CableLabs Innitiative VoIPPacketCable 1.0, 1,1
1,2
23
VoIP typical critical issues
End-to-End Delay (latency)ITU-T Recommendation
G.114 (05/00) - One-way transmission timeUnder
150 ms (with echo cancellation) acceptable for
most user applications 150-400 ms acceptable
provided that management is aware of the
transmission time impact on the transmission
quality of user applications.Above 400 ms
unacceptable for most applications.JitterPacket
LossPacket order
Other aspectsHigh Availability always
available service QoS system needed gt MPLS
(multiprotocol label switching)Differences Inli
ne power telephone handsets power supply is
provided in same cable as calls in opposite to
PC calling
24
PSTN Termination about prices
Terminating Tell calls from Internet to PSTN can
be doneIn one place (where from all call are
done)Internet is used for International lines
and thus interconnecting happens in country of
called user.
VoIP
PSTN
25
IP backbone Connectivity
In rural areas Main Data is able to provide cost
effective 2-way satellite connectivity to high
quality IP backbone less routers, less hops.
HFC Network DOCSIS
HFC Network DOCSIS
26
Main Data solutions for Data and Voice Services
in summary
Turn-key Technology Supplies Hybrid-Net
asymmetric PUSH FTP, PUSH e-mail, TCP/IP
accelerator, billing DOCSIS VoIP Multicast
application SMART EDUInterconnections
VoIP network allowing low price international
calls Satellite 2-way IP backbone connectivity
to CATV (rural areas)
27
Contact

• e-mailstatelov_at_maindata.sk
• www.smartedu.tv
• www.maindata.info
• GSM 421 905 606 027