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University of St.Thomas/Minnesota-TelePresence: frame by frame

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Mohamed Abdalla

on 13 January 2014

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Transcript of University of St.Thomas/Minnesota-TelePresence: frame by frame


Project Objective
Current State
Future State
Impact Analysis
Lessons learned
Questions /Comment What is
your product/service? Who is
your market? Who is
behind the company? Who is
your competition? What is
competitive advantage? TIP:
Be inspirational Group Introduction

Topic :


Group 5 members names:
Sharaja Overview of Telepresence:

Telepresence is the ability to connect geographically separated people via high-quality audio and video streams

Meet face-to-face, locally and internationally in a video telepresence room. To research and understand how the network could be impacted by the Tele-Presence

Cost and Benefit analysis of Tele- Presence over Video Conferencing Project Objective Company We have chosen IT Way as our model company IT Way is a global manufacturing company over 3000 employees.

Operate in over 3 countries

more than 20 branches world wide Current State

Current video conferencing system TANDBERG

Current State Functionality:
Bandwidth Control
System Configuration Backup
System Upgrade
Automatic Registration of Systems
Integrations with Active Directory Problem Description Need a Tele-conference Tool that is more flexible, scalable, robust and user friendly solution for a fairly large size company like IT Way

TANDBERG lacked basic Tele-conferencing features such as:
Quality of Service (QoS)
Dial Plans
Call Policy
Recording and Streaming
Unified Communications Comparison between TelePresence &Videoconferencing Comparison between TelePresence & Videoconferencing All the 4 factors above are important contributors to conference quality and the Tele- Presence experience but they come at a cost. For our research we have focused on four critical factors:

High quality audio and video
Environment& Excellence (cc) photo by medhead on Flickr Benefits of Tele-Conference over Video Conference Prequalification- We assessed 4 different Telepresence systems below:
CTS- 3000 supporting up to six participants at each location
CTS- 1000 supporting up to two participants at each location
CTS- 3200 supporting up to 18 participants for large meeting rooms
CTS- 500 supporting up to a single user for the executive or home office
IT Way is a multinational company and need a system that supports up to 18 participants. Thus, we recommend Cisco CTS 3200 system as the Teleconferencing system for IT Way Future State Future State: Cisco CTS- 3200 Offers real Time, HD video and audio transported over a converged IP network rather than a dedicated network.

Converged IP Network
Refers to Unified Computer Network
Uses Multiple Media (Wired, Wireless)
Carry variety of Traffic Types (Data, Voice, Video) on a single network Future State - Cisco CTS 3200 Teleconference Design
Room Dimensions, Shape, and Orientation:
Dimensional measurement has minimum, recommended, and maximum values of: Width, Depth, and Heigth Wall, Floor and Ceiling Surfaces:
Discusses the recommended colors, patterns, and materials of wall, floor, and ceiling surfaces within the room.
Types Wall Textures:
Wall surfaces should absorb sound from within the room and from outside the room rather than reverberate off of it
Paint color depends on the color temperature and intensity of the light within the room, color Recommended Colors:
Tan, Beige, Cork: Classic Caramel, Fairmont Gold, Peach Brandy
Gypsum drywall, wood paneling, brick or cinder block, and glass; certain wall surface materials provide better acoustic behavior than others.
The most common types of flooring surface material are carpet, wood, tile and marble, and raised plenum floors.
Ceiling Surfaces:
Metal, wood, gypsum drywall, and cement ceiling surfaces are the most common type of ceiling material.
Isolate the room from outside noise, such as foot traffic. Design Acoustics:
The concepts of sound reproduction and the effects of ambient noise and reverberation within the environment and how they are measured. Design It must be provided for the participants within the room:
There are two ways to accommodate this:
1. Built-in Ethernet and Power Receptacles
2. Providing 802.11 wireless Ethernet coverage within the TelePresence room Network Connectivity 1.Built-in Ethernet and Power Receptacles When using this method, follow two important guidelines:

For acoustic purposes, the Ethernet switch you choose must generate as little ambient noise as possible.

This switch should provide a software feature set that meets your organization’s requirements and policies for LAN security, quality of service (QoS), and manageability. 1. Built-in Ethernet and Power Receptacles This is the ideal way to provide connection:
1. it’s silent.

2. it’s generally easier to secure a wireless network .

3. provide differentiated access for guest users versus regular employees.

4. providing reliable and secure access to Cisco employees ,customers and other guests. 2. 802.11 wireless Ethernet coverage within the TelePresence room To be natural, realistic, and effective

The network infrastructure must service the high definition audio and video packets .

TelePresence is highly sensitive to packet loss, especially the HD video component.

It is up to 100 times more sensitive to packet loss than VoIP.

The targets for TelePresence campus in terms of packet loss is 0.05 percent with a network convergence target of 200 ms. TelePresence design availability The three main design options for the distribution block are as follows:
Multitier design
Virtual switching system (VSS) design
Routed access design (either EIGRP or OSPF) Available distribution blocks Design for TelePresence 1. Multitier Campus Distribution Block Design 2. Virtual Switch Campus Distribution Block Design TelePresence requires stricter service levels for loss, latency, and jitter than virtually any other application on the network.

TelePresence requires detailed bandwidth and burst provisioning on a device-by device basis. Quality of Service (QOS) Bandwidth Requirements Jitter target of 10 ms, peak-to-peak.
Jitter Threshold1 is set to 125 ms, and Jitter Threshold 2 is set to 165 ms.
If video frame jitter exceeds Jitter Threshold 1 for several seconds, two things occur:
1. A warning message appears at the bottom of the video display indicating that the network is experiencing congestion and that call quality might be affected.
2. The TelePresence codecs downgrade to a lower level of motion-handling quality within the given resolution. TelePresence Jitter Requirements CTS – 500
Single user for executive office or home office
CTS – 1000
Two participants at each location
CTS – 3000
Six participants at each location
CT S– 3200
Eighteen participants for large meeting rooms Types of CISCO TelePresence Systems Components of CTS 3200 Provides native 1080p high definition video and wide-band spatial audio utilizing standard audio and video compression methods

Provides integration and management for all in room components TelePresence Codec Provides centralized configuration, management, and call routing for all CTS endpoints

Supports 99.999 percent availability and providing a stable and feature-rich platform

CUCM also provides advanced call routing and Call Admission Control (CAC) Unified Communication Manager Calendaring integration and management

One-Button-to-Push meeting access

Resource and location management for Cisco

TelePresence Multipoint switch

CTS system management and reporting

Concierge services TelePresence Manager Room-based switching, which displays the entire room on all remote systems
Speaker switching, which allows each segment to be switched independently TelePresence Multipoint Switch Accounts


Permissions for CTS-Manager

Permission for rooms in which the CTS endpoints reside. Active Directory Manages Enterprise LAN/WAN Gigabit Ethernet or faster LAN of switches and routers. A WAN composed of high-speed routers interconnect using reliable transport services, such as point-to point leased line circuits or Multi-Protocol Label Switched Virtual Private Network (MPLS-VPN) services.
The displays connect to their respective codecs through High Density Multimedia Interface (HDMI) cables.
Microphones and Speakers attach to the cente (primary) codec only,Codec contains an amplifier and outputs amplified, speaker-level audio signals to the speakers. Impact of TelePresence on OSI Layers – Physical Layer The cameras connect to their respective codecs through two different cables:
1. 1000Base-T Gigabit Ethernet jumper cable: Provides IEEE 802.af Power over Ethernet to the camera and is also used for control signaling messages, such as setting the gain and color settings, and to upload new camera firmware code.
2. A Digital Video Interface to High Density Multimedia Interface (DVI-HDMI) cable: The DVI-HDMI cable is used for the video connection between the camera Impact of TelePresence on OSI Layers – Physical Layer Cont. Auxiliary components include PCs, document cameras, and auxiliary displays for viewing the associated video from these devices.

Using the Cisco Unified 7975 Series IP Phone, the user simply dials the telephone number of the Cisco TelePresence room with which they want to have a meeting, and the call is connected Impact of TelePresence on OSI Layers – Physical Layer Cont. Video Resolution and Compression Formats, displays and cameras natively support 1080p and 720p resolutions and use digital media interfaces to connect to the codecs. This ensures the integrity of the video signal from end to end, eliminating the need for any digital and analog conversion.
Cisco TelePresence codec, an onboard array of Digital Signal Processors (DSP) encode the digital video signal from the cameras into Real-Time Transport Protocol (RTP) packets using the H.264 encoding and compression standard.
The quality of the video enjoyed by the meeting participants is a function of three variables:
1. Resolution (the number of pixels within an image)
2. Frame rate (how often pixels are redrawn on the display)
3. Degree of compression applied to the original video signal Impact of TelePresence on OSI Layers – DataLink Layer Impact of TelePresence on OSI Layers – DataLink Layer Cont. Resolution, Quality, and Bandwidth-
Audio Encoding, Cisco TelePresence codec has four microphone input ports: three for the Cisco TelePresence microphones and one auxiliary audio input.

The auxiliary audio input is a standard 3.5 mm (1/8-inch) mini-stereo connector, which enables the users to connect the audio sound card of their PC along with the VGA (Video Graphics Array) video input Impact of TelePresence on OSI Layers – DataLink Layer Cont. Multipoint Switch
Server-based platform with capacity for up to 48 segments in a single meeting or spread across multiple meetings
When linked with the Cisco 5600 Media Experience Engine (MXE), the Cisco TelePresence Multipoint Switch provides interoperability with the installed base of H.323 and Session Initiation Protocol (SIP) video conferencing endpoints.
Two Switching Modes
1. Room-based switching, which displays the entire room on all remote systems
2. Speaker switching, which allows each segment to be switched independently Impact of TelePresence on OSI Layers – DataLink Layer Cont. Cisco Unified Communications Manager (CUCM) providing centralized configuration, management, and call routing for all CTS endpoints.

CTS endpoint is a SIP (Session Initiation Protocol)device Performing the role of enterprise-class, IP based private branch Exchange (PBX) and managing all endpoints registration and call routing within a given enterprise network standard. Impact of TelePresence on OSI Layers – Network Layer Transport layer protocols are signaling protocols that configure multimedia sessions across a network. Once a connection is set up, media flows between network nodes and are established by one or more data-transport protocols (ie. UDP or TCP).

1. User Datagram Protocol (UDP) is a network protocol covers only packets that are broadcast out. There is no acknowledgement when a packet has been received at the other side.

2. (TCP) is a client/server communication model. A client can request and is given a service by another server in a network. Every client request is separate and is treated as an individual entity. TCP can make smaller packets that go over the Internet and end up at a TCP layer on the opposite side of a call. Finally, TCP is not good for real-time streaming media transmission Impact of TelePresence on OSI Layers – Transport Layer Impact of TelePresence on OSI Layers – Transport Layer Cont. The average TelePresence voice RTP packet is approx. 220 bytes but with sRTP it will be roughly 4.5% increase

The average TelePresence video RTP packet is approx. 1,100 bytes and sRTP add only 0.9% increase

Video traffic exceeds the amount of bandwidth traffic usage as compared to voice

TelePresence adds an approx. 20% overhead to the network for both encrypted and non-encrypted meetings.

Real-Time Transport Protocol (RTP) handles the delivery functions for audio and video data packets. Impact of TelePresence on OSI Layers – Application Layer Active Directory Manages accounts, mailboxes, and permissions for CTS-Manager and the rooms in which the CTS endpoints reside.

Offer a collaboration service, including whiteboard projection

Every IP network can transport voice, video, and data, not every IP network is capable of delivering the extraordinary

Intelligence to types of application traffic and to apply application-specific policies

Policies typically include assigning the highest priority to telepresence traffic and dynamically allocating bandwidth - stateful deep packet inspection Impact of TelePresence on OSI Layers – Security TLS and IPsec are both viable means of encrypting all SIP signaling traffic between the server.

TLS works at the application layer, dynamically creating a secure tunnel between two applications whenever that application requests a socket.

IPsec, by contrast, works at the network or operating system layer, creating a secure tunnel between two hosts over which any application can travel.

For example, the Communications Manager runs on top of the operating system, whereas CUBE(Cisco Unified Border Element) runs on top of Cisco IOS. These two operating systems can create an IPsec tunnel between each other, over which any application protocol, such as SIP, could be tunneled. Impact of TelePresence on OSI Layers – Security Tunneling layer security versus IPsec Lesson Learned Telepresence is a massive combination of electrical, software, audio, video and other engineering disciplines.
We found respect for the amount of knowledge necessary to be a good network engineer.
We found that the topic Telepresence was too broad and team had hard time narrow it down to 20 pages for this Project
While trying to understand the impact of Telepresence on OSI layers, it can get into much technical details that we can understand
This being a summer Class, time was very limited.
If we had to do this again and have enough time given, we would like to apply some of the learnings from the research and come up with some kind of
Teleconferencing system for University of St Thomas.
Even though Cisco Telepresence is recommended for our company, it comes with a big price tag so is not recommended for small size companies
-After the implementation, even the least technical person can be able to operate a TelePresence Room Lesson Learned Forouzan, Behrouz A. "Data Communications and Networking." 4th Ed. McGrawHill 2007. 920-923. Print.

Cisco White Paper (2012). “Converge IP and DWDM Layers in the Core Network” [Online]. http://www.cisco.com/en/US/prod/collateral/routers/ps5763/prod_white_paper0900aecd80395e03.html References Questions!!! Lighting and Illumination:
Affected by:
Room Dimensions, Shape, and Orientation.
Wall, Floor and Ceiling Surfaces.

Four different angles from which light should be measured:
From the camera’s point of view, looking toward the participants
From the participant’s point of view, looking toward the cameras
From the participant’s point of view, facing upward toward the ceiling
From the perspective of the side and back walls Design 3. Routed Access Campus Distribution Block Design
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