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ROVER TECHNOLOGY
ENABLING SCALABLE LOCATION AWARE COMPUTING
ROVER TECHNOLOGY
INTRODUCTION
The technology which enables the scalable location-aware computing. This involves automatic availability of information and services based on a current location of the user. The user make avail location-aware computing through his PDA (Personal Digital Assistance).
ROVER SERVICES
 LOCATION-AWARE
 WIRELESS ACCESS TECHNOLOGIES
 BASIC DATA SERVICES
 TRANSACTIONAL SERVICES
 FILTER
 ZOOM
 TRANSLATE
 Physical architecture of Rover System
ROVER ARCHITECTURE
 END USERS
 ROVER CLIENTS
 WIRELESS INFRASTRUCTURE
 SERVERS
Server consists of:-
 Rover Controller
 Location Server
 Media Streaming Unit
 Rover Database
 Logger
ACTION MODEL
Rover controller is built according to a concurrent software architecture which is called the action model.
 Scheduling is done in atomic units called actions.
 An action is a small piece of code
 All actions are executed in a controlled manner by the Action Controller
 The action is executed whenever an I/O response is received.
SERVER OPERATION
The transaction is called SERVER OPERATION when a client interacts with the Rover controller.
A SERVER OPERATION IS A SEQUENCE OF ACTIONS.
SERVER OPERATION
A Server operation is in one of the following three states. They are:-
 Ready-to-run: At least one action is eligible to be executed but no action is executing.
 Running: One action is executing
 Blocked: Server operation is waiting for some I/O response
 Logical Architecture of A Rover System
ROVER CONTROLER
Rover controller interacts with other components of the system through the following interfaces:-
 Location Interface
 Admin Interface
 Content Interface
 Back-end Interface
 Server Assistants Interface
 Transport Interface
ROVER DATABASE
The database in a Rover consists of two components:-
 User Infobase and
 Content Infobase
PERSONAL DIGITAL ASSISTANT
 A Personal Digital Assistant (PDA) is a HAND HELD COMPUTER, also known as a palmtop computer.
 Newer PDAs commonly have color screens and audio capabilities, to be used as MOBILE PHONES (smart phones), web browsers, or portable media players.
 Many PDAs can access the Internet, Intranet or extranet via Wi-Fi, or Wireless Wide Area Networks (WWANs). Many PDAs employ Touch Screen technology.
MULTI-ROVER SYSTEM
The multi-rover system is a collection of independent rover systems that peer with each other to provide the seamless connectivity to the users.
The design of a multi-rover system is similar to the Mobile IP solution to provide network mobility to devices.
BASIC FUNCTIONALITY OF THE ROVER SYSTEM
 User activation/deactivation
 Device registration /deregistration
 Periodic broadcast of events from the rover controller
 Interaction between users by text messaging/voice chat
 Display of the Rover Client
 iPAQ Rover Client
CONCLUSION
Rover is currently available as adeployable system using specific technologies, both indoors and outdoors. The ultimate aim of this scenario is to provide a completely integrated system that operates under different technologies.
Future Works
The short and long term projects of this paradigm:-
 Experiment with limited capability devices
 Location aware Streaming Devices
 Interact with cellular providers and implement this mechanisms on cellular interface.
 Multi-Rover System