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MWN-08-GSM1Gand2G - 03.09.2011 Mobil ve Kablosuz Alar First...

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03.09.2011 1 Mobil ve Kablosuz A ğ lar Suat Özdemir Gazi Üniversitesi Bilgisayar Mühendisli ğ i Bölümü First Generation (1G) and S d G ti (2G Second Generation (2G) Systems 2 ht p:/ ceng.gazi.edu.tr/~ozdemir/ Today z 4 billion mobile phone users by the end of 2008 z Brazil, Russia, India, and China hold 1.3 billion mobile users z Nokia sold 115.2 million mobile phones in the first quarter of 2008 3 ht p:/ ceng.gazi.edu.tr/~ozdemir/ Broader Bandwidth Channels with High Spectrum Efficiency Digital Cellular Integrated Voice/Data & Wireless/Wireline Multimedia Services Location Services Mobile Telephone Service Advanced Wireless Voice Services Wireless Data Services Tele-Presenting Distance Learning Intelligent Agent Services First Generation Second Generation Third Generation Fourth Generation Global Wireless Services and Network Evolution ? Advanced Network/Software Architectures Advanced Coding & Signal Processing Techniques Intelligent Antennas Wideband Radios Knowledge-Based Network Operations Unified Service Networks Technology Microcellular & Picocellular Technologies Analog Cellular Technology Macrocellular Technology Mid-80s Mid-90s Year 2010 ? Year 2000+ W-CDMA UWC-136 cdma2000 AMPS USDC ETACS GSM IS-54/ 136 TDMA IS-95/ cdmaOne PDC DECT Source: IEEE Communications Magazine 4 ht p:/ ceng.gazi.edu.tr/~ozdemir/ Major 3G Standards Organizations Standard Organization Region International Telecommunications Union (ITU) International European Telecommunications Standard Institute (ETSI) Europe Telecommunications Industry Association (TIA) North America Association of Radio Industries and Business (ARIB) Japan American National Standard Institute (committee TIPI) North America 5 ht p:/ ceng.gazi.edu.tr/~ozdemir/ Block diagram of a cellular system MSC: Mobile Switching Center PSTN: Public Switched Telephone Network 6 ht p:/ ceng.gazi.edu.tr/~ozdemir/
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03.09.2011 2 Communication signaling in 1G systems Reverse=uplink Forward=downlink All first generation cellular systems use FM modulation. A typical example of 1G is AMPS. The system control resides in MSC. MSC maintains all mobile related information and controls each mobile handoff. MSC performs all of the network management functions. 7 ht p:/ ceng.gazi.edu.tr/~ozdemir/ Block diagram of a 1G cellular radio network 8 ht p:/ ceng.gazi.edu.tr/~ozdemir/ SS7 and Network Architecture of 1G SS7: Signaling System No. 7 that is used to interconnect most of the cellular MSCs in the US TDN: Temporary directory number IS-41 is a network protocol standard Long distance voice traffic is carried on the PSTN. 9 ht p:/ ceng.gazi.edu.tr/~ozdemir/ Signaling System No. 7 (SS7) z A high-speed and high-performance packet-based communications protocol z SS7 implements out-of-band signaling protocols, carried in a separate signaling channel, z Konu ş ma hatt ı ve sinyal hatt ı ayr ı l ı rm ı ş t ı r. Bu sayede kullan ı c ı alr istenmeyen “bip” ler duymazlar.
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MWN-08-GSM1Gand2G - 03.09.2011 Mobil ve Kablosuz Alar First...

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