January 2006
Beginner
1120 pages
72h 31m
English
book
Handbook of Information Security, Volume 1, Key Concepts, Infrastructure, Standards, and Protocols
by Hossein Bidgoli
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Air Interface Requirements for Mobile Data Services
Harald Haas, International University Bremen
Introduction
Spectral Efficiency and Interference
System Requirements
Multiuser Access
Duplexing
Link Adaptation
Radio Resource Management
Interference Considerations
DCA Algorithms
MAC Protocols
Packet Scheduling
Summary and Conclusion
Glossary
Cross References
References
INTRODUCTION
Current interest in wireless and cellular communications is aimed at high-speed data transmission. The fundamental system enhancements being developed will lead to many new mobile data services. Many different standards and systems have already appeared for cellular networks, wireless metropolitan area networks (MANs), wireless local area networks (WLANs), and personal area networks (PANs). Typical representatives, in the same order, are UMTS (universal mobile telecommunication system; http://www.umtsforum.org); WiMAX (http://www.wimaxforum.org, worldwide Interoperability for Microwave Access) standard, based on IEEE 802.16; and Wi-Fi (wireless fidelity) standard, based on IEEE 802.11 and Bluetooth. Although MANs, WLANs, PANs, and so forth are gaining significant momentum, cellular systems still offer the highest degree of mobility. Although cellular systems are the main carriers for mobile data services, mobile data services impose heavy demands on cellular systems, in particular with respect to security. For instance, if international roaming, such as in global standard for mobile communication (GSM), ...
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