The three chapters in this part ("Integrating Location-Based Mobile Services," "Location-Based Mobile Service Architectures," and "Delivering Mobile Services") address the specialized task of building back office servers capable of supporting location-aware applications on mobile terminals such as mobile telephones, personal digital assistants (PDAs), and in-car systems. Location-based mobile services (LBMS) are defined as those mobile services that depend on the location of a user s mobile terminal in order to target the information delivered to meet location- and time-dependent user needs. A typical example is the delivery of emergency or breakdown response to a motorist where the person s phone or in-car device can determine location. The location is sent to a server over a wireless link along with a services request, which could be as simple as "send help!" In-car navigation and telematics systems that calculate routes and guide the user to a chosen destination or guidance of two or more mobile users to a single rendezvous point is a sub-part of LBMS.
These chapters highlight how several .NET Enterprise Servers and technologies can help enterprises integrate wireless applications with existing line of business applications. The scenarios in these chapters use Windows 2000 Server, Mobile Information Server, Internet Information Server, Internet Security and Acceleration Server, Exchange Server, MSMQ, XML and SOAP. Host Integration Server can also be used as an option.