A Synchronous Transfer Mode(atm

Technical Seminar

A SEMINAR REPORT ON ASYNCHRONOUS TRANSFER MODE(ATM) Under the Guidance of Mr R.K.Shial

By Sangram Sekhar Choudhuri CS200118218 Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

INTRODUCTION • High performance, cell-oriented switching and multiplexing technology • Utilizes fixed-length packets to carry different types of traffic • Helps in efficient multimedia applications, high-speed LAN connections and used in broad range of networking devices Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

OVERVIEW

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

BENEFITS OF ATM • • • • • • •

high performance via hardware switching dynamic bandwidth for bursty traffic class-of-service support for multimedia scalability in speed and network size common LAN/WAN architecture opportunities for simplification via VC architecture international standards compliance

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM CELL HEADER FORMAT

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM REFERENCE MODEL

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM ADDRESS FORMAT

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM SERVICE CLASSES • constant bit rate (CBR) • variable bit rate–non-real time (VBR–NRT) • variable bit rate–real time (VBR–RT) • available bit rate (ABR) • unspecified bit rate (UBR) Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM TECHNICAL PARAMETERS • • • • • •

cell loss ratio (CLR) cell transfer delay (CTD) cell delay variation (CDV) peak cell rate (PCR) burst tolerance (BT) sustained cell rate (SCR)

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM STANDARDS • A cohesive set of specifications that provide a stable ATM framework. • Provide the end-to-end service definitions • An important ATM standard is interworking between ATM and frame relay • Two ATM networking standards 1)broadband intercarrier interface (B–ICI) 2)public network-to-network interface (P–NNI)

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

DATA INSERTION SCHEMES • RFC1483-specifies how interrouter traffic is encapsulated into ATM • LANEMPOA- support dynamic use of ATM SVCs • voice and video adaptation schemes-for efficient traffic that no natural breaks, such as a circuit carrying bits at a fixed rate Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM LAN EMULATION(LANE) • LANE components 1)LANE clients 2)LANE servers

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

VIDEO OVER ATM • Handled by VBR–RT VCs using AAL–5 for MPEG2 on ATM for video-on-demand applications • MPEG2 coding can result in two modes: 1. program streams—variable-length packets carrying single or multiple programs 2. transport streams—188-byte packets that contain multiple programs • Time stamps are inserted into MPEG2 packets during the encoding and multiplexing process to make better use of networking resources. Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

VOICE OVER ATM • VBR–RT connections is used over ATM which uses silence period. • Various dynamic compression techniques are used to free bandwidth and alleviate congestion • A further enhancement is to support voice switching over SVCs which interprets PBX (private branch exchange) signaling and routing voice calls to the appropriate destination PBX

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

NETWORK TRAFFIC MANAGEMENT • objectives :To deliver quality-of-service (QoS) for multimedia applications and provide overall optimization of network resources. • categorized into three distinct elements 1. nodal-level controls that operate in real time 2. network-level controls operate in near real time 3. network engineering capabilities operating in non real time Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM APPLICATIONS

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

ATM AND IP INTERWORKING

• ATM and IP offer: Scalability, traffic engineering, service differentiation, high availability, value-added applications such as Virtual Private Networks (VPNs) • Some specifications of ATM and IP 1. Multi-Protocol over ATM (MPOA) as addition to LAN Emulation (LANE) 2. Additions to ATM's superior routing protocol PNNI 3. adoption of Frame-based ATM over Sonet/SDH (FAST)

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

CONCLUSION • ATM technology is the only technology that can guarantee a certain and predefined quality of service. • The growth of the Internet, need for broadband access and e-commerce are spurring the need for a reliable, flexible, scalable, predictable, versatile transport system and that is given by ATM Technology. • For voice, video, data and images together, the next generation network depends on ATM. Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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Technical Seminar

Presented by :- Sangram Sekhar Choudhuri(CS200118218)

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