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Multiple Access Protocols For Mobile Communications
This book focuses on issues related to multiple access for cellular mobile communications, with a specific interest in access arbitration through multiple access protocols situated at the lower sub-layer of the second OSI layer, namely the medium access control (MAC) layer. In this chapter, first an introduction to cellular mobile communication systems is provided. This introduction will be further expanded upon in Chapter 2, particularly with respect to the features which distinguish the different generations of mobile communication systems, from analogue first generation (1G) systems to possible fourth generation (4G) scenarios. Next, it is discussed what impact the emergence of the Internet may have on cellular communication systems. The importance of multiple access protocols is also examined, particularly in the context of packet-based systems, and packet reservation multiple access (PRMA) is considered as a case study. Finally, together with some background information, an overview of our own research efforts related to PRMA-based protocols is provided. These efforts are mainly concerned with how to combine PRMA with code-division multiple access (CDMA), when such a combination is beneficial, and more generally with different approaches to access control at the MAC layer and their respective benefits. They are documented in detail in later chapters. |
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发表于 2007-9-13 03:36:31
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