Jochen Schiller – författare

Location-based services (LBS) are a new concept integrating a user''s geographic location with the general notion of services, such as dialing an emergency number from a cell phone or using a navigation system in a car. Incorporating both mobile communication and spatial data, these applications represent a novel challenge both conceptually and technically. The purpose of this book is to describe, in an accessible fashion, the various concepts underlying mobile location-based services. These range from general application-related ideas to technical aspects. Each chapter starts with a high level of abstraction and drills down to the technical details. Contributors examine each application from all necessary perspectives, namely, requirements, services, data, and scalability. An illustrative example begins early in the book and runs throughout, serving as a reference.· This book defines the LBS field and identifies its capabilities, challenges, and technologies.· The contributors are recognized experts from academia and industry.· Coverage includes navigation systems, middleware, interoperability, standards, and mobile communications.· A sample application, the "find-friend" application, is used throughout the book to integrate the concepts discussed in each chapter.

The mobile communications market remains the fastest growing segment of the global computing and communications business. The rapid progress and convergence of the field has created a need for new techniques and solutions, knowledgeable professionals to create and implement them, and courses to teach the background theory and technologies while pointing the way towards future trends.

In this book Jochen Schiller draws on his extensive experience to provide a thorough grounding in mobile communications, describing the state of the art in industry and research while giving a detailed technical background to the area. The book covers all the important aspects of mobile and wireless communications from the Internet to signals, access protocols and cellular systems, emphasizing the key area of digital data transfer. It uses a wide range of examples and other teaching aids, making it suitable for self-study and university classes.

The book begins with an overview of mobile and wireless applications, covering the history and market, and providing the foundations of wireless transmission and Medium Access Control. Four different groups of wireless network technologies are then covered: telecommunications systems, satellite systems, broadcast systems and wireless LAN. The following chapters about the network and transport layers address the impairments and solutions using well-known Internet protocols such as TCP/IP in a mobile and wireless environment. The book concludes with a chapter on technologies supporting applications in mobile networks, focusing on the Web and the Wireless Application Protocol (WAP). Each chapter concludes with a set of exercises for self-study (with solutions available to instructors) and references to standards, organizations and research work related to the topic.

New to this edition

Integration of higher data rates for GSM (HSCSD, GPRS) New material on 3rd generation (3G) systems with in-depth discussion of UMTS/W-CDMA Addition of the new WLAN standards for higher data rates: 802.11a, b, g and HiperLAN2 Extension of Bluetooth coverage to include IEEE 802.15, profiles and applications Increased coverage of ad-hoc networking and wireless profiled TCP Migration of WAP 1.x and i-mode towards WAP 2.0

Jochen Schiller is head of the Computer Systems and Telematics Working Group in the Institute of Computer Science, Freie Universitat Berlin, and a consultant to several companies in the networking and communication business. His research includes mobile and wireless communications, communication architectures and operating systems for embedded devices, and QoS aspects in communication systems.

Service provisioning in ad hoc networks is challenging given the difficulties of communicating over a wireless channel and the potential heterogeneity and mobility of the devices that form the network. Service placement is the process of selecting an optimal set of nodes to host the implementation of a service in light of a given service demand and network topology. The key advantage of active service placement in ad hoc networks is that it allows for the service configuration to be adapted continuously at run time. Service Placement in Ad Hoc Networks proposes the SPi service placement framework as a novel approach to service placement in ad hoc networks. The SPi framework takes advantage of the interdependencies between service placement, service discovery and the routing of service requests to minimize signaling overhead. The work also proposes the Graph Cost / Single Instance and the Graph Cost / Multiple Instances placement algorithms.

Service provisioning in ad hoc networks is challenging given the difficulties of communicating over a wireless channel and the potential heterogeneity and mobility of the devices that form the network. Service placement is the process of selecting an optimal set of nodes to host the implementation of a service in light of a given service demand and network topology. The key advantage of active service placement in ad hoc networks is that it allows for the service configuration to be adapted continuously at run time. Service Placement in Ad Hoc Networks proposes the SPi service placement framework as a novel approach to service placement in ad hoc networks. The SPi framework takes advantage of the interdependencies between service placement, service discovery and the routing of service requests to minimize signaling overhead. The work also proposes the Graph Cost / Single Instance and the Graph Cost / Multiple Instances placement algorithms.

Location-based services (LBS) are a new concept integrating a user's geographic location with the general notion of services, such as dialing an emergency number from a cell phone or using a navigation system in a car. Incorporating both mobile communication and spatial data, these applications represent a novel challenge both conceptually and technically. The purpose of this book is to describe, in an accessible fashion, the various concepts underlying mobile location-based services. These range from general application-related ideas to technical aspects. Each chapter starts with a high level of abstraction and drills down to the technical details. Contributors examine each application from all necessary perspectives, namely, requirements, services, data, and scalability. An illustrative example begins early in the book and runs throughout, serving as a reference.This book defines the LBS field and identifies its capabilities, challenges, and technologiesThe contributors are recognized experts from academia and industryCoverage includes navigation systems, middleware, interoperability, standards, and mobile communicationsA sample application, the "find-friend" application, is used throughout the book to integrate the concepts discussed in each chapter