This book continues with an exploration of volume 1 of the Bluetooth specification, called the core specification. Chapter 5 presents the overall Bluetooth protocol stack and describes the relationships among its layers. The remaining chapters of Part 2 examine each layer of the stack in turn, from the lowest layers to the higher layers. Chapter 6 discusses the Bluetooth radio, baseband, link controller and link manager layers. Chapter 7 explores the logical link control and adaptation protocol (L2CAP) layer and host controller interface (HCI). Chapter 8 discusses the RFCOMM and Service Discovery Protocol (SDP) layers, while Chapter 9 examines the protocols associated with application interoperability with the Infrared Data Association (IrDA) standard. Finally Chapter 10 describes the telephony control and audio protocols.

Part 2 is intended to make important information from the Bluetooth specification more accessible and understandable while explaining the motivation and rationale for key elements of the specification. Drawing upon our experience in helping to develop the specification, we attempt here to reveal its important elements rather than simply echoing information already available to specification readers.