TKK | Tietoverkkolaboratorio | Julkaisut

Annual Report 1998: Preface | Introduction | Personnel | Research projects | Teaching | Activities | Participation in boards and committees | Publications

4. TEACHING

4.1 Development of teaching

The course "Introduction to teletraffic theory" (S-38.145) was given for the first time in spring 1998. The course is planned to give a broad view of teletraffic issues in communications networks and familiarise the students with the basic tools for the dimensioning and analysis of the networks. Most of the material of the course is available in electronic form.

The course "Simulation of telecommunications networks" (S-38.147), was given for the first time in fall 1999. The course consists of three parts. In the first part general aspects of simulation are addressed and different methods for the generation of random variables and statistical analysis of the results are introduced. The second part deals with the construction of an event based simulation program. The third part gives an introduction to the available commercial simulation tools and a more detailed look at a specific tool.

The contents of the optional course "Principles in communication engineering" (S-38.105) was largely renewed. The course is now an overview of telecommunications and its purpose is to provide guidelines and pointers for further studies. The main body of work for the course book "Tietoliikenneaapinen" was completed during the year by Kirsi Voipio and Seppo Uusitupa.

The contents of the course Telecommunications Technology II was partially renewed. The course is now totally devoted to routing in packet and circuit switched networks.

4.2 Courses

The laboratory has given education in 25 courses. The courses can be divided into 7 groups:

4.2.1 Basic courses for all students studying telecommunications

S-38.105 Principles in Communication Engineering (Tietoliikennetekniikan perusteet)
S-38.118 Principles in Telecommunications Technology (Teletekniikan perusteet)

4.2.2 Courses concerning communications and networks

S-38.117 Seminar on Telecommunications Technology (Teletekniikan seminaari)
S-38.188 Telecommunication Networks (Tietoliikenneverkot)
S-38.191 Corporate Networks (Televerkot yrityksissä)

4.2.3 Courses on switching and ATM

S-38.110 Telecommunication Switching Technology I (Tiedonvälitystekniikka I)
S-38.122 Telecommunication Switching Technology II (Tiedonvälitystekniikka II)
S-38.164 Broadband Switching Technology (Laajakaistainen välitystekniikka)
S-38.166 Programming of Telecommunication Switching Systems (Televälitysjärjestelmien ohjelmointi)

4.2.4 Courses on signal processing

S-38.211 Signal Processing in Telecommunications I (Signaalinkäsittely tietoliikenteessä I)
S-38.212 Signal Processing in Telecommunications II (Signaalinkäsittely tietoliikenteessä II)

4.2.5 Postgraduate courses

S-38.001 Telecommunications Forum (Telecommunications Forum)
S-38.130 Postgraduate Course in Telecommunications (Teletekniikan lisensiaattikurssi)
S-38.141 Teletraffic Theory (Teleliikenneteoria)
S-38.143 Queueing Theory (Jonoteoria)
S-38.149 Postgraduate Course in Teletraffic Theory (Teleliikenneteorian lisensiaattikurssi)
S-38.200 Individual Course in Telecommunications (Teletekniikan yksilöllinen opintojakso)
S-38.220 Licentiate Course in Signal Processing in Communications (Tietoliikenteen signaalinkäsittelyn lisensiaattikurssi)
S-38.350 Research Seminar on Telecommunications Technology (Teletekniikan tutkijaseminaari)

4.2.6 Courses on teletraffic theory

S-38.145 Introduction to Teletraffic Theory (Liikenneteorian perusteet)
S-38.147 Simulation of Telecommunication networks (Televerkkojen simulointi)

4.2.7 Other courses

S-38.123 Telecommunications Technology, laboratory course I (Teletekniikan laboratoriotyöt I)
S-38.124 Telecommunications Technology, laboratory course II (Teletekniikan laboratoriotyöt II)
S-38.128 Telecommunications Technology, special assignment (Teletekniikan erikoistyö)
S-38.300 Thesis Seminar on Telecommunications Technology (Teletekniikan diplomityöseminaari)

4.3 Degrees

4.3.1 Doctor of Technology

Marko Silventoinen: Indoor GSM base station systems

The thesis of Marko Silventoinen studies indoor GSM base station systems. The indoor environment can be divided into two parts, home and office.

At home the subscriber can be given the possibility to invest in his or her own infrastructure by offering a low-cost Home Base Station (HBS). This will allow the GSM operator to apply lower rates at calls made from home, thus challenging the fixed line operator. An MS based hardware architecture will be used to achieve the low costs required from a consumer product. This leads to modifications on the air interface. In this thesis Silventoinen has studied two aspects of the HBS air interface: a frequency hopping scheme that allows HBSs to share the spectrum with the overlaying GSM network, and a fast power control scheme that helps HBSs to increase their performance without frequency hopping capability.

In the near future the shortage of carrier frequencies at the GSM band will force the operators to look for possibilities to enhance GSM's spectral efficiency, especially in already congested urban areas. The studies performed on the office BTS address this problem and propose new ways to improve the spectral efficiency while maintaining the air interface compatibility with the existing handsets.

The proposed indoor GSM base station concepts can serve also in other environments: HBS in small offices, and office BTS in shopping malls, stadiums, or even as a generic hot-spot solution.

4.3.2 Doctor of Philosophy (Helsinki University)

Samuli Aalto: Studies in queueing theory

The thesis of Samuli Aalto consists of two parts. In Part I, the optimal control problem of batch service queueing systems is studied. A natural control problem involves the determination of the epochs at which the service is initiated as well as the sizes of the batches served. The case of finite service capacity with general holding costs is considered with two types of arrival processes (Poisson and compound Poisson). In each case a new class of operating policies is introduced and it is proven that, under some additional assumptions, there is an optimal operating policy belonging to this new class. Models of this kind have applications, for example, in the area of transportation systems

In Part II the output process of some fluid flow storage models are characterized. First, assuming that the input rate is modulated by a certain type of a Markov jump process, it is proven that there exists another Markov jump process that modulates the output rate. The modulating process is explicitly constructed. Second, a fluid model of a multiplexer loaded by a finite number of heterogenerous on-off sources is considered. The main result here is a generalization of an earlier result characterizing the active periods on the output line by means of Laplace transforms.

4.3.3 Masters of Science in Telecommunication technology

Figure 6: Employers of Masters students

Annual Report 1998: Preface | Introduction | Personnel | Research projects | Teaching | Activities | Participation in boards and committees | Publications

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