Chapter 2. Cellular Access Systems
This chapter builds on the introduction to radio systems outlined in Chapter 1, “Introduction to Radio Systems,” and demonstrates how the various techniques have been used to develop mobile access systems. The chapter describes how cellular access systems have traditionally decomposed functionality between radio base station elements and base station controller equipment, with legacy Time-Division Multiplexing (TDM) or Asynchronous Transfer Mode (ATM)-defined interfaces between the two. The chapter then describes how IP is fundamentally impacting these access systems in two distinct ways, as follows:
• IP in the transport network: Access System interfaces are increasingly being defined using IP protocols and ...
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