Wise TSW800TP User manual

Operation Manual
IPTV
Annex to TSW800TP Operation Manual
Version: 4
Revision: 7
September/2010

Copyright
•This manual was created by Wise Telecommunications Industry. No part or contents
of this manual may be re-created without written authorization of Wise Telecommuni-
cations Industry.
•Wise Telecommunications Industry reserves the right to alter any of its products and
manuals contents, without any prior notification, according to its own discretion.
•Wise Telecommunications Industry products are under constant development, some
characteristics and functionality may not be included in the manuals during time of print;
they may be added as future annexes
•Any contribution or criticism that may influence the favorable development of this product
or manual will be welcomed by Wise Telecommunications Industry.
•If the content of this manual is not in accordance with the product functionality or oper-
ations please contact Wise Telecommunications Industry directly:
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Wise Telecommunications Industry
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Contents
1 Operation 3
2 IPTV Test Configuration 4
2.1 IPTVTabs ....................................... 4
2.2 IPTVTestviaEthernet ................................ 4
2.3 IPTVTestviaxDSL.................................. 4
2.4 IPTVconfigurationscreen............................... 4
3 IPTV Test Application 6
4 IPTV Test Conclusion 12

IPTV
1 Operation
The TSW800TP IPTV module has been developed to provide all of the required information
for the installation, maintenance and troubleshooting of IPTV (Internet Protocol TV ) and
VoD(Video on Demand ) services on xDSL lines.
It verifies if the video stream is being sent by a IPTV or VoD server and performs several
measurements to assesses the connection quality. Flow rates (audio, video and data) are mea-
sured separately, as well as the total packets of each flow. Several types of errors, which ease the
maintenance, are also measured, including, packet loss, packet delay / jitter, and measurement
of the expected performance.
The most important parameters are compared with predefined Quality of Service thresholds
levels (QoS).
TSW800TP allows physical testing via Ethernet or direct on xDSL lines. The capability of
the TSW800TP includes the following measurements:
•Errors
–Continuity Errors
–Error Indicator
–Synchronization Errors
–RTP packet Loss
–Out of sequence RTP packets
–RTP packet Discontinuity
•Jitter Measurements
–PCR Jitter
–Network Jitter
–Histogram of packet Jitter and PCR of the last 5 minutes.
•Stream Statistics (ST)
–Total of Video packets
–Total of Audio packets
–Total of Data packets
–Total of Unknown packets
•Stream Rates
–Video stream rate
–Audio stream rate
–Data stream rate
–Unknown stream rate
•Channels number (PIDS of PAT)
–Each channel Band Usage Percentage
•IGMP Measurements
–IGMP latency ( time between ordering the channel and when stream arrives )
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2 IPTV Test Configuration
2.1 IPTV Tabs
Initial screen with main tabs ETHERNET, LINE, SYSTEM and MODULES.
2.2 IPTV Test via Ethernet
From the HOME screen Select Ethernet by pressing the F1 key. Before entering the IPTV
module, press the numeric #2 key or move the cursor using the up and down keys to Ethernet
Configuration and press START/STOP (Start/Stop keys may be used as an ENTER key
as well) to configure how to obtain IP addresses (manual or automatic). If the TSW800TP MAC
address is required to be the same of the STB MAC address, the configuration can be done in
this screen also.
More information about the Ethernet Configuration item may be viewed at the TSW800TP
basic manual. To enter IPTV module, go back to initial screen, by pressing F1, and press numeric
key 4 or move the cursor to the IPTV item and press START/STOP.
2.3 IPTV Test via xDSL
Select Line tab and configure the line as described on TSW800TP basic manual. To enter
IPTV module, go to initial screen, by pressing F1 and press numeric key 4 or move the cursor
to IPTV item and press START/STOP.
2.4 IPTV configuration screen
Test, via Ethernet or via xDSL, have the same configuration screen:
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•F1 - Home : Go back to initial screen;
•F2 -View: Shows ten screen options to be visualized. See section 3;
•F3 - Actions: Shows Start/Stop and results saving options. See section 3;
•F4 - Edit: Allows to edit the parameter where the cursor is;
•Stream: Up to three streams (video flows) can be started.
•Protocol:
This parameter defines the transport protocol type. Although video codification protocol
is MPEG-4, the transport mechanism used is MPEG-2 Transport Stream. TS packets
may be encapsulated into UDP/IP or RTP/UDP/IP. IPTV uses IGMP protocol (Internet
Group Management Protocol) to get into a multicast group, different from VoD, that uses
RTSP (Real Time Streaming Protocol ) to get into a unicast group.
Multicast MPEG2-TS/UDP: MPEG-2 TS packets are encapsulated into UDP/IP.
Multicast MPEG2-TS/RTP: MPEG-2 TS packets are encapsulated inside RTP pack-
ets, which are encapsulated into UDP/IP.
Multicast MPEG2-TS/RTP BrT: MPEG-2 TS packets are encapsulated inside RTP
packets, which are encapsulated into UDP/IP (little-endian).
Unicast MPEG2-TS/UDP: MPEG-2 TS packets are encapsulated into UDP/IP.
Unicast MPEG2-TS/RTP: MPEG-2 TS packets are encapsulated inside RTP packets,
which are encapsulated into UDP/IP.
Unicast MPEG2-TS/RTP Brt: MPEG-2 TS packets are encapsulated inside RTP
packets, which are encapsulated into UDP/IP (little-endian).
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•IP Address:
This parameter defines the desired IPTV channel IP address. It is necessary to know the
specific IP address to send a IGMP packet asking to get into the multicast group that
is receiving the channel. Only after the request is accepted, will the video stream starts.
This field appears only if multicast protocol is selected.
•URL (RTSP):
This parameter defines the URL of the VoD server. It is necessary to know this URL to
send a RTSP packet asking to get into the unicast group. The video stream starts after
this request is accepted. This field appears only if an option with unicast is selected.
•Port Number:
This parameter defines the port number which IPTV communication will use. Only ap-
pears if a multicast protocol is chosen.
3 IPTV Test Application
Press the F3 key (Actions), select Start Stream 1, then press START/STOP to start the
first IPTV test. It is possible to activate all three streams simultaneously.
If the protocol chosen is a multicast, an IGMP packet will be sent. Choosing a unicast
protocol (VoD), a RTSP packet will be sent and the video flow should start in a while. Through
F2 key (View), a pop-up menu gives access to many others screens. The description of each
option is given below.
•Video Config
Press #1 Key or select 1.Video Config and press START/STOP key to close pop-up menu
and show the initial configuration screen.
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•IP results
This screen shows received IP, Gateway IP, DNS server IP and the Subnet mask.
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•Stream Statistics
This screen shows TS packets total count (MPEG-2 transport packet, with 184 data bytes
and 4 header bytes). Each TS packet has a PID that is analyzed to see if the packet should
be counted as video, audio, data or unknown packets. Total bytes are also informed. F4
key (Stream) defines which stream will have its counters shown.
•Stream Rates
This screen shows Kbps rates for different types of packets: video, audio, data and un-
known.
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•QoS Stream
This screen shows the QoS parameters, its current and maximum values and the assessment
of the quality of service, comparing with the predefined boundaries.
– PCR Jitter (Program Clock Reference)
Measures the evaluated jitter, analyzing the reference clock, recorded into same pack-
ets. Jitter is the oscillation of time interval between packets received, comparing the
time recorded when it was generated. This interval should be equal to the differ-
ence between the recorded times, but the decoder and the network may delay some
packets. If there is an excessive oscillation, the decoder may have problems. The
maximum jitter to approve quality of service is 10ms.
– Latency
Measures the time between the transmission of a request to receive a program (stream)
and the moment when the packet flow starts. The maximum latency to approve
quality of service is 250ms.
– Continuity Error (Cont. Err.)
Measures the packets’ sequence loss. The MPEG-2 TS packet has a sequence counter
that allows the receiver to know a packet did not arrive by the required time. QoS
screen: This counter looks at percentage, it counts the total continuities errors divided
by the total MPEG2 TS packages. The maximum percentage to approve the service
quality is 0.1
– Error Indicator (Err. Ind.)
Indicates there was a problem during the generation. This indication is done by the
encoder when it detects corrupted source content. It is not related to the performance
of the distribution network. Only the value zero approves quality of service here.
•QoE (Quality of Experience)
The new term used to assess the media quality percept by the final user. To measure QoE
at IPTV, the MDI (Media Delivery Index) is used. This index is composed of DF (Delay
Factor) Jitter and MLR (Media Loss Rate). MDI is ruled by RFC 4445.
– DF Jitter
Its a measure that indicates the amount of video, in milliseconds, needed to be stored,
considering the instantaneous video rate, to avoid jitter effect at the final user video.
This parameter gives a hint of the minimum size of the buffer required at the next
node.
– MLR
Represents the amount of media packages that are lost per second. Losses due to
buffer overflow which occurs when there is network jam or when there are bad network
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devices, resulting in many time gaps with positive and similar MLR. Transient effects,
caused maybe due to electrical variation noise, result in less affected time gaps, i. e.,
the positive MLR values will be sparse and random.
•Errors
This screen shows several types of errors and the respective counted amount.
– Continuity Errors
Registers the amount of sequence packets loss.
– TS Lost
Registers the amount of TS (Transport Stream) unity losses. Losing one IP frame
may result in the loss of seven TS packets due to the 188 byte TS packetsize.
– Error Indicator
Registers the amount of packets arrived with the bit Error Indicator activated.
– Sync. Errors
Registers the amount of times that it was not possible to identify a MPEG-2 TS
packet on the application layer.
– RTP Lost
Registers the amount of lost RTP frames when the protocol is MPEG-2 Broadcast
(RTP).
– RTP OOS
Registers the amount of RTP frames out of sequence when the protocol is MPEG-2
Broadcast (RTP).
– RTP Discontinuity
Registers the amount of RTP frames sequence breaks when the protocol is MPEG-2
Broadcast (RTP).
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•Jitter
This screen shows PCR jitter and Network jitter counting, maximum and instantaneous
values. Network Jitter is caused by network traffic. PCR jitter may be caused by the en-
coder, by the network or by reception problems. When the protocol is MPEG-2 Broadcast
(UDP), only the PCR jitter will be shown. IGMP Latency is also shown in this screen
and measures the time between a request to receive a program (stream) and packet flow
starts.
•PID Map
This screen shows each PID (Packet Identifier) received its type and description. This
parameter identifies to whom the packet belong. If PID is 0, the packet is PAT (Program
Association Table), which is a table with each PMT (Program Map Table) PID. There is
a PMT to each channel (program). This PMT is a table containing PIDs of video, audio
and data packets of that channel.
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•Band Usage
This screen shows each stream band usage status and percentage. The band usage per-
centage is the channel rate divided by the sum of all actives channels rates.
4 IPTV Test Conclusion
To finish the IPTV Test the streams should be stopped. Press F3 key (Action) and the
number of the stream. Stop Stream by pressing START/STOP. If there are more streams
running, it will be necessary to stop one at a time. Selecting the Save option, the test results
may be saved into a file, as shown. With the following capabilities the TSW800TP is the right
tool for properly deploying and managing IPTV services over xDSL lines.
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