Accesses and Transports Networks
FEKT-CPTSAcad. year: 2019/2020
The subject deals with evolution of telecommunication networks and their convergence with computer ones. The stress is insisted on modern analysis of access and transport networks with forcing of their diversity and also concurrent features together with application of analogue and digital modulations. First-rate attention is given to complex usage of an E1 frame by G.703 recommendation. Students obtain view of private and public EWSD and S12 telephony exchanges, they understand principles of digital switches S and T, of actual signalling system SS7 and of internet SIP exchange. Modern computer networks are explained with usage of CISCO technology for network elements. Students extend their knowledge of packet switching, protocols of Ethernet networks, switching in LAN networks, virtual networks VLAN, wide networks WLAN, frame Relay networks and other.
Learning outcomes of the course unit
Graduate of this subject is able to:
- differentiate relationship of access and transport networks and their facilities solution,
- apply analogue and digital modulations,
- explain terms sampling, quantization and coding,
- discuss sampling theorem,
- explain frame E1,
- express spectrum of sampling signal,
- design switch S and T,
- measure active network elements,
- set SIP exchange and digital transmission equipment,
- apply and analyse computer networks protocols,
- specify different between IPv4 and IPv6,
- evaluate converged networks development
The subject is mandatory, student should be able:
- demonstrate principles of circuit switching,
- interpret principles of packet switching,
- arrange possibilities of communication channels separation,
- express invention of A/D and D/A conversion,
- discuss elemental terms of signal processing area,
- apply basic principles and protocols of Ethernet network.
Students should have basic knowledge of communication systems, which gets in the mandatory subjects in the previous study.
Recommended optional programme components
Recommended or required reading
ŠKORPIL, V.: Přístupové a transportní sítě. VUT, Brno 2012.
ŠKORPIL, V., POLÍVKA, M.: Přístupové a transportní sítě, laboratoře. VUT, Brno 2013.
ODOM,W. and HEALY,R. and MEHRA,N. Směrování a přepínání sítí. Computer Press, Brno 2009.
MORREALE, P., TERPLAN, K.: Modern Telecommunications. CRC Press, London 2001.
NOLL, M.A.: Principles of Modern Communications Technology. Artech House, London 2001.
FRENZEL, L.E.: Principles of Electronic Communication Systems. McGraw Hill, New York 2003.
WAGGENER, W.N.: Pulse Code Modulation Systems Design. Artech House, London 1999.
Planned learning activities and teaching methods
Teaching methods include lectures and practical laboratories. The part of this course is a presentation of results in power point. Course is taking advantage of e-learning (Moodle) system.
Assesment methods and criteria linked to learning outcomes
0-10 points – activity in laboratory,
0-20 points - written test in laboratory (optional part),
0-70 points - written exam with e-learning support, compulsory part of the completion of the course.
Exam is focused to verify the orientation of the access and transport networks, detail analysis of digital transmission on frame E1 base, extended knowledge of computer networks protocols.
Language of instruction
1. Introduction to the course. Evolution of telecommunication networks. Analogue and digital modulations. Modulations PCM, DM, ADM, DPCM, ADPCM. Terrestrial non-mobile networks, mobile networks, Wireless networks, Satellite networks. Terminals.
2. Access networks. Definition and function of access network. Architecture of access network. Level of access network. Optical access networks. local networks LAN, topology of LAN, LAN standards, technology Token Ring.
3. Transport networks. Definition and function of transport network, architecture of transport network, data transmission in transport network, security of data transport on transport network. wide networks WAN, networks Frame Relay.
4. Telephony exchanges. Operating system, operational load. Main operational hour, losses. Digital switching area, multiplexing, one-part and multi-part switching areas.
5. Digital switches S and T. Controlling and signalization in digital exchanges. System SS7. Systems EWSD and S12. Internet SIP exchange.
6. Transmission systems. Encoders and decoders PCM, A/D, D/A converters. Compandors and non-linear encoders, mí-low characteristic, A-low characteristic. Link codes. Recommendation ITU-T G.703, frame and multi-frame of 1st order system - E1. Transmission equipment PCM 30U and PCM 30U- OCH.
7. Analysis of total distortion at access and transport networks. Distortion allocation. Simplified calculation of Attenuation of quantizing distortion. Peak limiting for harmonic and noise signal. Analysis of sampling signal spectrum, spectrum for PAM 1st order and 2nd order.
8. Measuring at digital transmission systems. Analyser and generator of PCM signal, generator of pseudo-random sequence. Modern analysators. Check of digital signal step by step - BER measuring. Measuring of quantizing distortion, jitter measuring, residual attenuation measuring. ¨
9. Higher order digital systems. Plesiochronous Digital Hierarchy - PDH, Synchronous Digital Hierarchy - SDH, terminology at SDH. Quality of SDH, multiplexing scheme of SDH.
10. Technology CISCO for network elements. Basics of Ethernet networks. Setting of CISCO network elemnts.
11. Switching at LAN networks. Virtual networks VLAN. Protocols ISL and 802.1Q. STP (Spanning Tree Protocol) 802.1d. Routing at IP. Protocol RIP version 2, protocol EIGRP, protocol OSPF.
12. Quality of Service QoS. Classification and calibration. Control and network overload prevention. Shaping and regulation. Multicast transmission and routing IP. Multicast IP addresses, protocol IGMP.
13. Problem finalization. View of access ant transport technologies.
Giving a comprehensive overview of all most important parts of the converged network, which is here comprehended as a tool for transmitting information to a required recipient in required quality. Access network solutions, means of traffic concentration, integration of services, multiple utilization of transmission media. Principles of Ethernet computer network in the relation to classical telecommunication network.
Specification of controlled education, way of implementation and compensation for absences
Attendance on laboratories is compulsory, properly excused laboratories can be filled after talking to the lecturer