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(More customer reviews)Ambient Networks aim at providing network integration through a new kind of network architecture. Ambient Networks go beyond current convergence approaches that integrate specific technologies, by providing a unified networking concept that can adapt to as many possible environments (radio technologies, services, devices).
The content of the book reflects well the status of this topic: it's only in the prospective stage. The challenges are so hige that it's unclear today how fast developments will be made in this area. On the other hand, ambient network thinking makes us think about what kind of network usability and seamlessness one would like to see in the long-term future.
The central concept of Ambient Networks is "network composition". Network composition refers to the techniques that allow the control spaces of different networks to be dynamically and recursively combined to support complex scenarios. Network composition requires co-operation, negociation, and proper interfaces to be defined across networks and layers of the network stack, hence constitutes a tremendous challenge compared to today's networks.
The book starts by presenting the current communications environment and the central concept in ambient networking: network composition. The motivation for ambient networks, convergence, is discussed in chapter 2. Convergence towards all-IP networks is an opportunity to go further than simply allowing some technologies (GSM, IMS, WiMAX, wireless LAN,...) to interact. The third chapter presents the business environment of Ambient Networks: is there a business future for such dynamic networks? The foreseen architecture and principles of Ambient Networks is presented in chapter 4. Security in an heterogeneous environment like Ambient Networks faces big challenges: identification and authentification of mobile nodes, authorization to dynamically composed services. The conceptual aspects of network composition are addressed in chapter 6: how might composition procedures work, how to define the types of composition? Chapter 7 describes the Generic Ambient Networks Signalling (GANS), the signalling framework between functional elements of Ambient Networks. The problems faced by multi-radio access are tackled in chapter 8: advertising services and networks, access selection, authentication, payment, etc. An evaluation of the potential gain of using several radio access technologies at once is also presented to illustrate the potential of network composition across different technologies. Mobility management is dicusssed in chapter 9. Managing address space when physical locations change over time, for different kinds of devices using different sets of access technologies is challenging. Locators of nodes and bootstrapping requires new ways of thinking about routing and address space. Mobility in an heterogenous environment makes handover operations even more complex. Making name resolution maintain end-points communication in a mobile and heterogeneous environment requires more than the traditional DNS. For proper delivery of different media, overlay networks are envisioned as a solution in chapter 10. A possible solution for the collection, dissemination and management of network context called ContextWare is discussed in chapter 11. Finally, chapter 12 discusses the different approaches to Ambient Networks management and details one possible example (P2P).
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