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07-11-2009, 04:06 PM
Post: #1
Rover Technology

.ppt  ROVER TECHNOLOGY.ppt (Size: 258.5 KB / Downloads: 1261)
Abstract
Location-aware computing involves the automatic tailoring of information and services based on the cur-rent location of the user. We have designed and implemented Rover, a system that enables location-basedservices, as well as the traditional time-aware, user-aware and device-aware services. To achieve systemscalability to very large client sets, Rover servers are implemented in an action-based concurrent soft-ware architecture that enables fine-grained application-specific scheduling of tasks. We have demonstratedfeasability through implementations for both outdoor and indoor environments on multiple platforms.1 IntroductionA user is shopping in a mall. On entering a store, he pulls out a PDA and browses through detailed informationabout the products on display. Satisfied with the information, through the PDA, he makes an online purchaseof the items of interest, that will be subsequently shipped to his home directly. As he walks on to the next store,which happens to be a video rental store, information on newly-released movies in his favorite categories aredownloaded automatically into his PDA, along with their availability information. He chooses a couple of thesemovies and indicates that he will pick them up at the storefront. His membership discounts are applied to thebill, and he confirms the charge to his credit card.

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07-12-2009, 03:49 PM
Post: #2
RE: Rover Technology
INTRODUCTION


Rover Technology adds a user's location to other dimensions of system awareness, such as time, user preferences, and client device capabilities. The software architecture of Rover systems is designed to scale to large user populations.
Consider a group touring the museums in Washington, D.C. The group arrives at a registration point, where each person receives a handheld device with audio, video, and wireless communication capabilities. an off-the-shelf PDA available in the market today. A wireless-based system tracks the location of these devices and presents relevant information about displayed objects as the user moves through the museum. Users can query their devices for maps and optimal routes to objects of interest. They can also use the devices to reserve and purchase tickets to museum events later in the day. The group leader can send messages to coordinate group activities.

The part of this system that automatically tailors information and services to a mobile user's location is the basis for location-aware computing. This computing paradigm augments the more traditional dimensions of system awareness, such as time-, user-, and device-awareness. All the technology components to realize location-aware computing are available in the marketplace today. What has hindered the widespread deployment of location-based systems is the lack of an integration architecture that scales with user populations.


ROVER ARCHITECTURE
Rover technology tracks the location of system users and dynamically configures application-level information to different link-layer technologies and client-device capabilities. A Rover system represents a single domain of administrative control, managed and moderated by a Rover controller. Figure 1_ shows a large application domain partitioned into multiple administrative domains, each with its own Rover system - much like the Internet's Domain Name System" 2


End users interact with the system through Rover client devices- typically wireless handheld units with varying capabilities for processing, memory and storage, graphics and display, and network interfaces. Rover maintains a profile for each device, identifying its capabilities and configuring content accordingly. Rover also maintains end-user profiles, defining specific user interests and serving content tailored to them.

A wireless access infrastructure provides connectivity to the Rover clients. In the current implementation, we have defined a technique to determine location based on certain properties of the wireless access infrastructure. Although Rover can leverage such properties of specific air interfaces,1 its location management technique is not tied to a particular wireless technology. Moreover, different wireless interfaces can coexist in a single Rover system or in different domains of a multi-Rover system. Software radio technology3 offers a way to integrate the different interfaces into a single device. This would allow the device to easily roam between various Rover systems, each with different wireless access technologies.

A server system implements and manages Rover's end-user services. The server system consists of five components:
The Rover controller is the system's "brain." It manages the different services that Rover clients request, scheduling and filtering the content according to the current location and the user and device profiles.

The location server is a dedicated unit that manages the client device location services within the Rover system. Alternatively, applications can use an externally available location service, such as the Global Positioning System (GPS).
The streaming-media unit manages audio and video content streamed to clients. Many of today's off-the-shelf streaming-media units can be integrated with the Rover system.

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28-02-2010, 12:31 PM
Post: #3
RE: Rover Technology

.ppt  ROVER TECHNOLOGY .ppt (Size: 4.54 MB / Downloads: 678)


ROVER TECHNOLOGY
INTRODUCTION

Location - aware, Time-aware, User-aware, and,
Device-aware
This involves automatic tailoring 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).

PRESENTED BY
PANKAJ GULERIA
T3224237


ROVER SERVICES

BASIC DATA SERVICES
TRANSACTIONAL SERVICES
MAP-BASED SERVICES

FILTER¦
ZOOM¦.
TRANSLATE¦

LOCATION-SENSING TECHNOLOGIES

COARSE GRAINED SYSTEMS Accuracies on the order of meters.
Suitable for outdoor areas
FINED GRAINED SYSTEMS
Accuracies on the order of centimeters.
Suitable for both with higher accuracies.
SENSOR FUSION

ROVER ARCHITECTURE

End Users :
Rover Clients :
Wireless access infrastructure :

Servers (manage and implements services provided to users)
Servers consists of the following :-
Rover Controller
Location Server
Media Streaming Unit
Rover Database
Logger

ROVER DATABASE

1) User info base:-
Maintains user and device info with
Volatile data and Non-volatile data
2) Content Info base:-
stores content served by the controller.
3) Transactions of rover controller with database from server operation are done by:-
lock-acquiring and blocking flags
avoiding deadlock.

LOCATION SERVER

RADIO MAP TECHNIQUES
Works in 2 phases:
1) Offline phase.
Signal strength to vectors.
2)A location determination phase.
Vector sample compared with the radio-map.

MODEL BASED TECHNIQUES

Signal strength received from each access point is
transform in function of distance.

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

ACTION MODEL

Allows Rover systems to scale to large user populations by allowing real-time application specific scheduling of tasks.
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

A SERVER OPERATION IS A SEQUENCE OF ACTIONS
Server operation refer to a transaction that
interacts with the rover controller.
Each server operation has exactly one response handling action for handling
I/O event responses for the operation.

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.
¢ ACTION CONTROLLER uses administrator “defined policies for
¢ scheduling of actions.
¢ Management and execution of actions :-
¢ Init(action id, function ptr):
¢ Run(action id,function parameters, deadline failed handler ptr):
¢ Cancel(action id,cancel handler ptr):
PERSONAL DIGITAL ASSISTANT

A PDA is a hand held computer, also known as a palmtop computer.

Newer PDAs commonly have colour screens and audio capabilities, to be used as mobile phones(smart phones),
Many PDAs can access the Internet, Intranet or extranet via Wi-Fi, or Wireless Wide Area Networks (WWANs).

MUTLI-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.
Authentication
Service level agreements

Conclusion & 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
01-03-2010, 01:09 PM
Post: #4
RE: Rover Technology
read full report from http://www.seminarprojectsThread-Rover-Technology-Enabling-Scalable-Location-Aware-Computing
24-03-2011, 09:33 AM
Post: #5
RE: Rover Technology

.ppt  ROVER TECHNOLOGY.ppt (Size: 258.5 KB / Downloads: 95)
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
03-05-2011, 12:24 PM
Post: #6
RE: Rover Technology
plz.. send me seminar report on topic Rover Technology..
plz send me seminar report on topic Rover Technology
plz.. send me seminar report on topic Rover Technology..
26-01-2012, 09:34 AM
Post: #7
RE: Rover Technology
i want sources of rover technology
26-01-2012, 10:05 AM
Post: #8
RE: Rover Technology
to get information about the topic Rover Technology full report,ppt and related topic refer the link bellow

http://www.seminarprojectsThread-rover-technology

http://www.seminarprojectsThread-rover-technology-enabling-scalable-location-aware-computing
04-02-2012, 01:11 PM
Post: #9
RE: Rover Technology
to get information about the topic Rover Technology full report ,ppt and related topic refer the link bellow

http://www.seminarprojectsThread-rover-technology

http://www.seminarprojectsThread-rover-technology-enabling-scalable-location-aware-computing
05-03-2012, 10:26 AM
Post: #10
RE: Rover Technology
To get more information about the topic "rover technology " please refer the link below


http://www.seminarprojectsThread-rover-technology-enabling-scalable-location-aware-computing

http://www.seminarprojectsThread-rover-technology

http://www.seminarprojectsThread-rover-technology-enabling-scalable-location-aware-computing?pid=11800#pid11800
14-08-2012, 01:34 PM
Post: #11
RE: Rover Technology
what r the type of rover technology?



















.........................
18-06-2013, 11:28 AM
Post: #12
RE: Rover Technology
Rover technology


.doc  Rover technology.doc (Size: 823.5 KB / Downloads: 16)

INTRODUCTION

Rover technology adds a user's location to other dimensions of system awareness, such as time, user preferences, and client device capabilities. The software architecture of Rover systems is designed to scale to large user populations.
Consider a group touring the museums in Washington, D.C. The group arrives at a registration point, where each person receives a handheld device with audio, video, and wireless communication capabilities. an off-the-shelf PDA available in the market today. A wireless-based system tracks the location of these devices and presents relevant information about displayed objects as the user moves through the museum. Users can query their devices for maps and optimal routes to objects of interest. They can also use the devices to reserve and purchase tickets to museum events later in the day. The group leader can send messages to coordinate group activities.

ROVER ARCHITECTURE

Rover technology tracks the location of system users and dynamically configures application-level information to different link-layer technologies and client-device capabilities. A Rover system represents a single domain of administrative control, managed and moderated by a Rover controller. Figure 1_ shows a large application domain partitioned into multiple administrative domains, each with its own Rover system - much like the Internet's Domain Name System" 2

ROVER SERVICES

Rover offers two kinds of services to its users' basic data services and transactional services.
Basic data services use text, graphics, audio, and video formats. Users can subscribe dynamically to specific data components through the device user interface. Rover filters the available media formats according to the device's capabilities. The basic data service involves primarily one-way interaction.
Transactional services have commit semantics that require coordinating state between the clients and Rover servers. E-commerce interactions are examples of this service class.
Location is an important attribute of all objects in Rover. Several techniques exist for estimating an object's location, including the GPS and radio-frequency techniques based on signal strength or signal propagation delays. The choice of technique significantly affects the granularity and accuracy of the location information. Rover therefore uses a tuple of value, error, and time stamp to identify an object's location1. The value is an estimate of the object's location (either absolute or relative to some well-known location). The error identifies the uncertainty in the estimate. The time stamp identifies when the estimate was made.
The accuracy required of location information depends on the context of its use. For example, an accuracy of 4 meters is adequate to provide walking directions from the user's current location to another location about 500 meters away. However, it is inadequate for locating a particular painting on a museum wall directly in front of the user. Obviously, the accuracy of location information improves significantly with direct user input. For example, the user can directly input a location on a map displayed on his or her device.
Rover includes support for operations to filter, zoom, and translate map display. Filter operations are keyed to a set of attributes that identify certain properties of map objects. Rover generates the filters based on the user's context. The filters select and map the appropriate object subset for display. For example, one user may be interested only in the restaurants in a specific area, while another wants to view only museum and exhibition locations.

SYSTEM SCALABILITY

Two potential bottlenecks can hinder the system's scalability. One is the server system, which must handle a large number of client requests with tight real-time constraints. The other is the wireless access points, which have limited bandwidth.
To handle the large volume of real-time requests that users generated, we developed the action model, a fine-grained, real-time, application-specific architecture that allows Rover systems to scale to large user populations. To make its implementation more efficient, we divided the Rover server components into two classes based on the user request volumes they handle:
Primary servers the Rover controller, location server, and streaming media unit which communicate with the clients directly and therefore handle large volumes of user requests, and
Secondary servers the Rover database and logger which communicate only with primary servers to provide back-end system capabilities.

Actions versus threads

There are several ways to implement the Rover controller using a thread model. For example, each server operation could have a separate thread, or each user could have a separate thread handling all its operations. Both of these approaches imply a large number of simultaneously active threads as we scale to large user populations, resulting in large overheads for thread switching.
A more sensible approach is to create a small set of "operator" threads that execute all operations for example, one thread for all register Device operations, one for all locateUser operations, and so on.
This approach reduces the thread-switching overhead, but there are drawbacks. For one, the threads package restricts the ability to optimize scheduling, especially in time-based scheduling. More importantly, each operator thread executes its set of operations in sequence, which severely limits the ability to optimally schedule the eligible actions within an operation and across operations. Of course, each thread could keep track of all its eligible actions and do scheduling at the action level, but this essentially re-creates the action model within each thread.

COMMUNICATION INTERFACES

For the wireless interface to client devices, we considered two link-layer technologies: IEEE 802.11 and Bluetooth. Bluetooth is power efficient and therefore better at conserving client battery power. According to current standards, Bluetooth can provide bandwidths up to 2 Mbps.
In contrast, IEEE 802.11 is less power efficient but widely deployed and currently provides bandwidths up to 11 Mbps. In areas where these high-bandwidth alternatives are not available, Rover client devices will use the lower bandwidth interfaces that cellular wireless technologies provide.
Figure 3 shows how Rover's controller interacts with other parts of the system and with the external world. The controller uses the location interface to query the location service about the positions of client devices and the transport interface to identify data formats and interaction protocols for communicating with the clients.

CONCLUSION

Rover is currently available as a deployable system using specified technologies, both indoors and outdoors. Ultimately, our goal is to provide a completely integrated system that uses different technologies and allows a seamless experience of location-aware computing to clients as they move through the system. With this in mind, we have various short- and long-term projects:
Experiment with a wider range of client devices, both those with limited text and graphics display capabilities and those that can support richer functionality, such as location-aware streaming video services.
Integrate more wireless air interfaces with the Rover system. Bluetooth is a logical next technology to experiment with. In the longer term, we expect to work with cellular providers to define and implement mechanisms that will let Rover clients interact over the cellular interface.
Implement more location-determination techniques. We are experimenting with new mechanisms for better location estimation, including a signal propagation delay-based technique, called PinPoint Technology, developed at the University of Maryland.
08-03-2015, 11:03 AM
Post: #13
RE: Rover Technology
I need more information about rover technology
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