Cmc handbook
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Cmc handbook Document Transcript

  • 1. CELLULAR AND MOBILE COMMUNICATIONSUNIT I CELLULAR MOBILE RADIO SYSTEMS : Introduction to Cellular Mobile System,Performance criteria, uniqueness of mobile radio environment, operation of cellularsystems, Hexagonal shaped cells, Analog and Digital Cellular systems.UNIT II ELEMENTS OF CELLULAR RADIO SYSTEM DESIGN : General description ofthe problem, concept of frequency channels, Co-channel Interference Reduction Factor,desired C/I from a normal case in a omni directional Antenna system, Cell splitting,consideration of the components of Cellular system.UNIT III Co-Channel Interference : Introduction to Co-Channel Interference, realtime Co-Channel interference, Co-Channel measurement, design of Antenna system,Antenna parameters and their effects, diversity receiver.UNIT IV Non-cochannel interference: Non-cochannel interference -different types,measurement, design of Antenna system, Antenna parameters and their effects,diversity receiver.UNIT V CELL COVERAGE FOR SIGNAL AND TRAFFIC : Signal reflections in flat andhilly terrain, effect of human made structures, phase difference between direct andreflected paths, constant standard deviation, straight line path loss slope, generalformula for mobile propagation over water and flat open area, near and longdistance propagation antenna height gain, form of a point to point model.UNIT VI CELL SITE AND MOBILE ANTENNAS : Sum and difference patterns and theirsynthesis, omni directional antennas, directional antennas for interference reduction,space diversity antennas, umbrella pattern antennas, minimum separation of cell siteantennas, high gain antennas.UNIT VII FREQUENCY MANAGEMENT AND CHANNEL ASSIGNMENT : Numberingand grouping, setup access and paging channels channel assignments to cell sites andmobile units, channel sharing and borrowing, sectorization, overlaid cells, non fixedchannel assignment.UNIT VIII Handoff, dropped calls and cell splitting, types of handoff, handoff invitation,delaying handoff, forced handoff, mobile assigned handoff. Intersystem handoff, cellsplitting, micro cells, vehicle locating methods, dropped call rates and their evaluation.TEXTBOOKS :1. Mobile Cellular Telecommunications – W.C.Y. Lee, Tata McGraw Hill, 2rd Edn., 2006.2. Principles of Mobile Communications – Gordon L. Stuber, Springer International 2ndEdition, 2007.REFERENCES :1. Wireless Communications - Theodore. S. Rapport, Pearson education, 2nd Edn., 2002.2. Wireless and Mobile Communications – Lee McGraw Hills, 3rd Edition, 2006.3. Wireless Communication and Networking – Jon W. Mark and Weihua Zhqung, PHI,2005.4. Wireless Communication Technology – R. Blake, Thompson Asia Pvt. Ltd., 2004.
  • 2. B. LESSON PLANSubject Cellular and Mobile CommunicationsFaculty Mrs. Swetha Annangi Text Books (to be purchased by the Students) Mobile Cellular Telecommunications – W.C.Y. Lee, Tata McGraw Hill,Book 1 2rd Edn., 2006. Principles of Mobile Communications – Gordon L. Stuber, SpringerBook 2 International 2nd Edition, 2007. Reference Books Wireless Communications - Theodore. S. Rapport, Pearson education,Book 3 2nd Edn., 2002. Wireless and Mobile Communications – Lee McGraw Hills, 3rd Edition,Book 4 2006. Wireless Communication and Networking – Jon W. Mark and WeihuaBook 5 Zhqung, PHI, 2005.Book 6 Wireless Communication Technology – R. Blake, Thompson Asia Pvt. Ltd., 2004. Chapters Nos No of Unit Topic Book Book Book Book Book Book class 1 2 3 4 5 6 es Cellular mobile radio I 1 1 07 systems Elements of cellular II 2 3 07 radio system design Co-Channel III 6 8 09 Interference Non Co-Channel IV 7 8 08 Interference Cell coverage for V 5 06 signal and traffic Cell Site and Mobile VI 8 06 Antennas Frequency VII Management and 10 11 07 Channel Assignment VIII Handoff 11 12 06 Contact classes for syllabus coverage 56 Lectures beyond syllabus 3 Special Descriptive Tests 2 Tutorial classes 3 Remedial classes 2 Total No. of classes 66
  • 3. C. ASSIGNMENT PROBLEMS QUESTIONS UNIT-I1 Explain the operation of cellular systems2 Discuss Analog and digital cellular system3 Describe the mobile radio transmission medium4 Discuss Analog cellular system5 Explain Basic Cellular System with a neat block diagram.6 Discuss the performance criteria of Basic Cellular System.7 Discuss the limitations of conventional mobile telephone system Discuss the three categories for specifying the performance criteria of a cellular system.8 UNIT-II1 Derive the C/I from a Normal case in an Omni directional Antenna system.2 Explain two kinds of cell splitting techniques with neat sketches. Draw the general view of cellular telecommunication and explain the function of3 each component.4 Distinguish between Permanent Splitting and Dynamic Splitting. Explain the Concept of frequency Reuse channels and mention the two schemes5 of frequency reuse. Explain Co-channel interference reduction factor and derive the general formula6 for C/I.7 Derive the C/I in an Omni directional Antenna system. What is cell splitting? Explain the two kinds of cell splitting techniques.8 UNIT-III Prove that K = 7 cell pattern does not provide a sufficient frequency reuse1 dstance even when an ideal condition of flat terrain is assumed. Explain how Co-channel interference in measured in real time mobile radio2 Trans receivers. Discuss the various techniques to measure the co-channel interferences3 Distinguish between two types of Interferences.4 UNIT-IV Distinguish between Co-channel interference and Non Co-channel interference.1 Explain the two methods of Diversity with a neat block diagrams.2 Explain the effects of cell site Antenna heights.34 Explain the different types of Non-Co-channel interferences. UNIT-V Derive the relation for received power in when the wave is propagating over1 water or flat open area between two fixed stations. Write short notes on “Mobile to Mobile Propagation”.2
  • 4. Explain the effects of cell site Antennae heights.3 State the Merit of point-point model and Give the general formulae of Lee’s4 point- to – point model. Discuss the Mobile point to point Model (Lee Model).5 The distance between two fixed stations (i) 40 km. the effective height at one end h1 (ii) 100 m above sea level. Find the height h2 at the end under the two conditions.6 i) Pr < Po at 850 MHz transmission ii) Pr > Po and find the maximum received power Pr for Pr = 4 Po. UNIT-VI What are the different synthesis of sum pattern? Explain them briefly.1 What are the antennas used at cellsite2 Draw the symmetrical difference pattern and compare it with symmetrical sum pattern.3 Draw the cell site antenna for omni cells for 45 and 90 channels and explain them.4 Draw the setup for space diversity antennas used at cell site and explain how to design5 it. Explain the synthesis of difference patterns.6 UNIT-VII What type of messages are received to the set up channels when the mobile unit1 monitors strongest signal strength? What are the advantages of Reuse-partition scheme?2 What is channel sharing and channel borrowing?3 What are the different techniques for increasing frequency spectrum?4 Compare the average blocking in spatially uniform and nonuniform traffic distribution5 for FCA, BCA and FBCA. What is the function of frequency management?6 UNIT-VIII What are the different types of handoffs? Explain how to implement them?1 Define a dropped call rate and explain how it differ from blocked call?2 Explain how the handoffs implemented based on signal strength?3 How the dropped call rate is related to the capacity and voice quality.4 What are the different factors that limit the size of splitting cells?5 Explain the following terms: (a) Mobile Assisted Handoff (b) Soft Handoff6 (c) Delaying Handoff (d) Cellsite Handoff