Accesses and Transports Networks
FEKT-KPTSAcad. year: 2017/2018
The subject deals with the evolution of telecommunication networks and their convergence with computer networks. The stress is placed on modern analysis of access and transport networks while considering their diversity and also concurrent features together with the application of analogue and digital modulations. Primary attention is given to the complex usage of an E1 frame by G.703 recommendation. Students obtain a view of the private and public EWSD and S12 telephony exchanges, they understand the principles of digital switches S and T, of the current signalling system SS7 and of the SIP internet exchange. Modern computer networks are explained using the CISCO technology for network elements. Students extend their knowledge of packet switching, protocols of Ethernet networks, switching in LAN networks, VLAN virtual networks, WLAN wide networks, frame Relay networks, and others.
Learning outcomes of the course unit
Upon course completion, students will be able to:
- differentiate between the relationship of access and transport networks and their facilities solution,
- apply analogue and digital modulations,
- explain the terms sampling, quantization and coding,
- discuss sampling theorem,
- explain the E1frame,
- express the spectrum of sampling signal,
- design switches S and T,
- measure active network elements,
- set SIP exchange and digital transmission equipment,
- apply and analyse computer network protocols,
- specify the difference between IPv4 and IPv6,
- evaluate the development of converged networks
The course is obligatory, students should be able to: - demonstrate the principles of circuit switching, - interpret the principles of packet switching, - enumerate the possibilities of separating communication channels, - express the idea of A/D and D/A conversion, - discuss elemental terms of the signal processing area, - apply the basic principles and protocols of the Ethernet network. Students should have the basic knowledge of communication systems, which they obtained in the obligatory courses in their 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 for course completion.
Exam is focused on verifying the orientation of access and transport networks, detailed analysis of digital transmission on frame E1 base, and extended knowledge of computer network 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. lLocal 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 in 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 in digital transmission systems. Analyser and generator of PCM signal, generator of pseudo-random sequence. Modern analysers. 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 of SDH. Quality of SDH, multiplexing scheme of SDH.
10. CISCO technology for network elements. Basics of Ethernet networks. Setting of CISCO network elements.
11. Switching in 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 the Ethernet computer network in relation to the classical telecommunication network.
Specification of controlled education, way of implementation and compensation for absences
Attendance at laboratories is compulsory, justified absence from laboratory exercises can be made up after prior arrangement with he instructor.
Classification of course in study plans
- Programme EEKR-BK Bachelor's
branch BK-TLI , 3. year of study, winter semester, 5 credits, compulsory
- Programme IBEP-TZ Bachelor's
branch TZ-IBP , 3. year of study, winter semester, 5 credits, optional specialized
- Programme EEKR-CZV lifelong learning
branch ET-CZV , 1. year of study, winter semester, 5 credits, compulsory