HI1021 Mobile Communications 7.5 credits

The course focuses on problems in radio communications and how these problems determine the design of the mobile radio communication systems. A project work is included in the course.

The student shall

·        For different GSM systems be able to calculate uplink and downlink frequencies from the absolute radio channel number and vice versa

·        From a block diagram explain what happens with the signal in the terminal and the network

·        Explain the signaling network extension with SCCP, TCAP and MAP

·        Explain the structure of the ISDN number and map that to the operator’s subscriber number MSISDN

·        Explain the use of the MSRN number, the TMSI number, the IMEI number and LAI number in the GSM network

·        Explain the security functions AUC, SIM and triplets in GSM

·        Explain how a call that originates or terminates in a mobile phone from abroad or in the country

·        Explain the TT records as the basis for billing and statistics

·        Explain the timeslot structure in GSM

·        Explain the principles for modern hybrid coding, the differences between FR, EFR and AMR coding, and the use of DTX and power control in the GSM network

·        Explain the principles for cell planning in NMT, GSM and UMTS

·        Explain wave propagation problems such as Rayleigh fading and frequency selective fading and explain how the problems are solved in GSM and UMTS

·        Explain channel coding in different GSM and GPRS channels, use convolutional encoding and Trellis diagrams, punctuated and soft encoding, and hybrid ARQ

·        Explain the principle behind interleaving and the importance of frequency hopping in GSM networks for the performance of convolutional coding

·        Explain the SMS service in GSM networks

·        Explain data communication in GSM and GPRS networks

·        Explain the upgrading of GSM to EDGE and EGPRS

·        Explain the function of a RAKE receiver, Walsh modulation, soft and softer handover, the importance of power control in CDMA networks and be able to calculate processing gain

·        Briefly describe the structure of GSM, GPRS and UMTS networks

·        Describe services in a radio communication system, dispatch systems and explain the TETRA system and its services

Basic knowledge in telecommunications is required.

Wallander, Per: GSM-boken. Perant AB, ISBN 91-86296-09-4

If the course is discontinued, students may request to be examined during the following two academic years.

• ANN1 - Exercises, 1.5 credits, grading scale: P, F
• RED1 - Account, 6.0 credits, grading scale: A, B, C, D, E, FX, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

Tomas Lind

• All members of a group are responsible for the group's work.
• In any assessment, every student shall honestly disclose any help received and sources used.
• In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.