4 Baseband

4.1 Introduction

We begin this chapter by making some clear distinctions between the terms “Link Controller” and “Baseband” (see Figure 4–1). The Bluetooth specification uses these terms somewhat ambiguously, and a clear distinction will provide a useful handle on which to hang some later concepts.

Figure 4–1 Link control and the baseband.


The Link Controller (LC) is responsible for carrying out link level operations over several data packet durations in response to higher level commands from the Link Manager (LM). The local and remote LC entities will manage the packet by packet process of establishing the link once commanded by ...

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