Mobile Communications Chapter 11 : Outlook

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Janel Haynes
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1 Mobile Communications Chapter 11 : Outlook The future of mobile and wireless networks Is it 4G? All IP? Licensed? Public? Private? Prof. Dr.-Ing. Jochen Schiller, MC SS Mobile and wireless services Always Best Connected LAN, 780 kbit/s GSM 53 kbit/s Bluetooth 500 kbit/s UMTS, GSM 115 kbit/s LAN 100 Mbit/s, 54 Mbit/s UMTS, DECT 2 Mbit/s GSM/EDGE 384 kbit/s, 780 kbit/s GSM 115 kbit/s, 11 Mbit/s UMTS, GSM 384 kbit/s Prof. Dr.-Ing. Jochen Schiller, MC SS

2 Wireless systems: overview of the development 1981: NMT : NMT 900 cellular phones 1992: GSM 1994: DCS 1800 CDMA 1983: AMPS D-AMPS 1993: PDC satellites 1982: Inmarsat-A 1988: Inmarsat-C 1992: Inmarsat-B Inmarsat-M 1998: Iridium cordless phones 1980: CT0 1984: CT1 1987: CT : CT 2 wireless LAN DECT 199x: proprietary 1997: IEEE : b, Bluetooth analogue digital 2000: GPRS 4G fourth generation: when and how? 2001: IMT ?: Fourth Generation (Internet based) 2000: IEEE a Prof. Dr.-Ing. Jochen Schiller, MC SS Overlay Networks - the global goal integration of heterogeneous fixed and mobile networks with varying transmission characteristics regional vertical handover metropolitan area campus-based horizontal handover in-car, in-house, personal area Prof. Dr.-Ing. Jochen Schiller, MC SS

3 250 Wireless access technologies DAB relative speed [km/h] GSM, TETRA EDGE FDD UMTS DECT TDD Bluetooth b physical/ economic border HiperLAN2, a/.11g Point-to-multipoint distribution systems 10 kbit/s 2 Mbit/s 20 Mbit/s bandwidth 150 Mbit/s Prof. Dr.-Ing. Jochen Schiller, MC SS Key features of future mobile and wireless networks Improved radio technology and antennas smart antennas, beam forming, multiple-input multiple-output (MIMO) space division multiplex to increase capacity, benefit from multipath software defined radios (SDR) use of different air interfaces, download new modulation/coding/... requires a lot of processing power (UMTS RF GIPS) dynamic spectrum allocation spectrum on demand results in higher overall capacity Core network convergence IP-based, quality of service, mobile IP Ad-hoc technologies spontaneous communication, power saving, redundancy Simple and open service platform intelligence at the edge, not in the network (as with IN) more service providers, not network operators only Prof. Dr.-Ing. Jochen Schiller, MC SS

4 Example IP-based 4G/Next G/ network PSTN, CS core SS7 signalling gateways server farm, gateways, proxies broadcast GSM BSC MSC SGSN IP-based core router firewall, GGSN, gateway Internet RNC access points private WPAN private UMTS public Prof. Dr.-Ing. Jochen Schiller, MC SS Potential problems Quality of service Today s Internet is best-effort Integrated services did not work out Differentiated service have to prove scalability and manageability What about the simplicity of the Internet? DoS attacks on QoS? Internet protocols are well known also to attackers, hackers, intruders security by obscurity does not really work, however, closed systems provide some protection Reliability, maintenance Open question if Internet technology is really cheaper as soon as high reliability ( %) is required plus all features are integrated Missing charging models Charging by technical parameters (volume, time) is not reasonable Pay-per-application may make much more sense Killer application? There is no single killer application! Choice of services and seamless access to networks determine the success Prof. Dr.-Ing. Jochen Schiller, MC SS

5 Have fun with mobile communications! This is the end of the slide set but there is so much more to say about mobile communications! Thanks for following so far and enjoy digging into the fascinating wireless and mobile world! Jochen Schiller, Berlin/Germany, 2005 Prof. Dr.-Ing. Jochen Schiller, MC SS

Seamless integration of heterogeneous wireless network technologies -?/!

Seamless integration of heterogeneous wireless network technologies -?/! Jochen Schiller Computer Systems & Telematics Freie Universität Berlin Germany schiller@computer.org Prof. Dr.-Ing. Jochen Schiller,