Sudan University of Science &Technology. College of Graduate Studies. Faculty of Engineering. Department of Electronic Engineering

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1 الله بسم الرحمن الرحيم Sudan University of Science &Technology College of Graduate Studies Faculty of Engineering Department of Electronic Engineering Study of Mobile Network Transmission System دراسة أنظمة إرسال الهاتف الجوال A Thesis Submitted in Partial Fulfillment for the Requirements of Degree of M.S.c in Telecommunication Engineering Prepared By: Abuelazaim Mohammed Ahmed Supervisor: Dr. Abd Elrasoul Gabar Alzubaidi Feb

2 الله بسم الرحمن الرحيم الةية تعالي قال : أ شك ر أ ن أو ز ع ن ي ب ر ي ت أن ع م ال ت ي نع مت ك ع ل أد خل ن ي و ض ا ه ت ر ص ا ل ح ا ص ا ل حني ن ال ع ب ا د ك ف ي ب ر ح م ت ك أ ع م ل وأ ن وال د ي وع ل ى ( الهيه (19) من سورة النمل العظنيم الله صدق 2

3 DEDICATION I dedicate this to the spirit of the be ceased my father, brother Yousif & all my family and to all my friends. 3

4 ACKNOWLEDGEMENT First of all, I would like to thank our almighty God for shedding on me good health and keeping my mother working to the extent completing this research. Next, to the Center of Engineering And Technical Studies (CETS) and many thank to my supervisor Dr. Abd Elrasoul Gabar Alzubaidi, especially, I would like to sincerely thank him for his valuable advance and the continuous effort that exerted while was I carrying out this study. Sincere appreciation goes to my parents, brothers, sisters and all my friends. 4

5 ABSTRACT GSM system was studied through simulation, which describes in the computer simulation that explained the work of the GSM and therefore it could be useful as educational tool. The research consists of theoretical, the software and background for GSM, types and how it works and its uses. The purpose of the research is the possibility of using and solution which it give on telecommunication and speed of flow data and transform the computer screen to screen signal from mobile to another in the same network or another one through a system of information processing, and operations performed with the system and the sequence that is preformed in it. 5

6 تجريد تم دراسة النظام العالمي للهاتف الجوال أداة البحث مع شرح لعمل النظام وبالتالي كيف يمكنه ان يكون تعليمية مفيدة ويتكون البحث من جزءين رئيسين هما الجزء النظرى والجزء البرمجى ويحتوي ايضا علي خلفية نظرية النظام وانواعه وطريقة عمله والمجالت التى يستخدم فيها. والغرض من هذا البحث هو إمكانية استخدامه والحلول الت يقدمها فى مجال التصلت وسرعة تدفق البيانات كما يوضح كيفية التصال من هاتف جوال لخر داخل الشبكة الواحدة أو شبكة مختلفة من خلل نظام معالجة المعلومات والعمليات التي تجرى مع هذا النظام. 6

7 CONTENTS Dedication.. I Acknowledgement...II Abstract. III IV تجريد CONTENTS V List of Figures VIII List of Tables X Abbreviations..XI Chapter one: Introduction 1.1 Background problem Statements Objective Methodology Research Outline..5 Chapter two: GSM Transmission 2.1 Overview Transmission Introduction to radio and terrestrial transmission Transmission through the air interface Physical and logical channels Logical channels Broadcast channels Common control channels Dedicated control channels Traffic Channels (TCH) Time slots and bursts Problems and solutions of the air interface Multipath propagation

8 2.13 Shadowing Propagation delay...25 Chapter three GSN SIMULATION 3.Architecture of the GSM network Mobile station Base station Subsystem Transmission between BSC and BTS Network Subsystem Radio Link Aspects Channel Coding and Modulation Power Control Handover Mobility Management Call Routing The concept of multiplexing Summary of the Learning points...45 Chapter Four Network Planning & Optimization 4 Network planning and optimization Introduction Switching network planning Cellular transmission network planning Radio network planning Dimensioning cells Frequency reuse Optimizing and developing the network...56 Chapter Five Results and Dissection 8

9 5.1 Results Dissection.57 Chapter Six Conclusion and Recommendation 6.1 Conclusion Recommendation...58 References

10 LIST OF FIGURES Page number 2.1 Frequency allocation for GSM illustrates the TDMA principle Examples of frequency and amplitude modulation Example of phase modulation A small logistical problem Tuning into the network TDMA bursts and timeslot The effects of multipath propagation Speech processing in the mobile station Frequency hopping Antenna receiver Shadowing effect Propagation delay problem and solution Examples of BTS configurations BTS - BSC connections Implementations of the trans coder at different sites Trans coder and sub multiplexer Network planning map Simulated cellular radio network planning BTS configurations Frequency planning exercise Frequency reuse pattern example.55 10

11 LIST OF TABLES number Table 2.1 Table 4.1 Page GSM 900 frequencies 7 Erlangen B table.53 11

12 ABBREVATION AMPS AUC BAIC BAOC BOIC BCCH BCH BER Bps BSC BSS BTS CC CCCH CDMA CFB CFU CGI C/I CLIP CM CW DCS DCCH DTX EIR ETSI FACCH FCCH Advanced Mobile Phone Service Authentication Center Barring of All Incoming Calls Barring of All Outgoing Calls Barring of Outgoing International Calls Broadcast Control Channel Broadcast Channel Bit Error Rate bits per second Base Station Controller Base Station Subsystem Base Transceiver Station Call Control Common Control Channel Code Division Multiple Access Call Forwarding on mobile subscriber Busy Call Forwarding Unconditional Cell Global Identity Carrier-to-Interference ratio Calling Line Identification Presentation Communication Management Call Waiting Digital Cellular System Dedicated Control Channel Discontinuous transmission Equipment Identity Register European Telecommunications Standards Institute Fast Associated Control Channel Frequency-Correction Channel 12

13 FDMA FEC FER GIWU GMSC GMSK GSM HLR LA LAI LOS MM MS MSC MSRN NMT NSS PAD PCH PCS PDC PIN PLMN PSPDN PSTN RACH RF SACCH SCH SDCCH SIM Frequency Division Multiple Access Forward Error Correction code Frame Erasure Rate GSM Interworking Unit GSM Mobile services Switching Center Gaussian Minimum Shift Keying Global System for Mobile communications Home Location Register Location Area Location Area Identity Line-Of-Sight Mobility Management Mobile Station Mobile services Switching Center Mobile Station Roaming Number Nordic Mobile Telephone Network and Switching Subsystem Packet Assembler Dissembler Paging Channel Personal Communications Services Personal Digital Cellular Personal Identification Number Public Land Mobile Network Packet Switched Public Data Network Public Switched Telephone Network Random Access CHannel Radio Frequency Slow Associated Control CHannel Synchronization Channel Standalone Dedicated Control Channel Subscriber Identity Module 13

14 SMS Short Message Services SMS-CB Short Message Services Cell Broadcast SMS-MO/PP Short Message Services Mobile Originating/Point-to-Point SMS-MT/PP Short Message Services Mobile Terminating/Point-to-Point SNR Signal to Noise Ratio SRES Signed Result SS Supplementary Services TACS Total Access Communication System TCH Traffic Channel TCH/F Traffic Channel/Full rate TCH/H Traffic Channel/Half rate TDMA Time Division Multiple Access TMSI Temporary Mobile Subscriber Identity UMTS Universal Mobile Telecommunications System VAD Voice Activity Detection VLR Visitor Location Register 14

-The equipment was limited to operate only within the boundaries of each country. -The market for each mo bile equipment was limited.

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