07-04-2011, 04:56 PM
[attachment=11884]
INTRODUCTION/OBJECTIVE
Title of the Project
Wireless communication
objective of project
To eliminate wires and cables between stationary and mobile devices, facilitates fast and smooth data and voice communication.
Introduction
The scope of the project involves the establishment of the connection between the two entities one master and the other client. Any two devices that come in contact can exchange data with the help of this bluetooth protocol stack. . The medium of exchange mostly used is electromagnetic radiations; this is one of the forms of wireless communication. Due to hardware constraints in using this wireless form of communication the best approach used in the project for data communication is through socket programming assuming a network connection.
BLUETOOTH is a Radio specification protocol for wireless connectivity between various devices having a working range between 10 m to 100m in the 2.4 GHz band. The channel is represented by a pseudo-random hopping sequence hopping through the 79 or 23 RF channels. Two or more Bluetooth devices using the same channel form a piconet. There is one master and one or more slave(s) in each piconet. The BLUETOOTH protocol stack consists of various layers each having various functionalities.
In the BLUETOOTH protocol stack, the layer just below the Applications layer is the Session layer, which makes use of OBEX functions, which initiates data exchange between the two devices.
The OBEX (OBject EXchange) is the session layer of the BLUETOOTH stack. It manages sessions and dialogues between BLUETOOTH devices. Another important function of the OBEX is to exchange objects between a set of BLUETOOTH devices. OBEX also handles multiple connections. It performs all the operations in a request-response format.
The OBEX layer is designed for use in applications of BLUETOOTH such as File Transfer, Synchronisation Profile, and Businesscard Exchange. The OBEX layer will be integrated on the stack and used in any of the devices that are BLUETOOTH specific. This layer helps in establishing the connection and maintaining the connection. It helps the dialogue control between the two entities.
The scope of the project involves the establishment of the connection between the two entities – one master and the other client. Any two devices that come in contact can exchange data with the help of this bluetooth protocol stack. The medium of exchange mostly used is electromagnetic radiations; this is one of the forms of wireless communications. Due to the hardware constraints in using this wireless form of communications, the best approach used in the project for data communication is through sockets programming assuming a network connection.
This project demonstrates the data exchange between a master and a single client using the form of OBEX (Object Exchange) present in Sessions layer of the Bluetooth protocol stack. The data exchange between the two entities is done through Sockets programming making use of UDP packet data exchange. Each request of data exchange gets an acknowledgement for the data received since the data is sent in the form of packets. Each packet size is fixed based on the OBEX protocol standards.
AN Introduction TO Object Exchange Protocol
One of the most basic and desirable uses of the IrDA infrared communication protocols is simply to send an arbitrary “thing”, or data object, from one device to another, and to make it easy for both application developers and users to do so. We refer to this as object exchange (un-capitalized), and it is the subject of the protocol described in this document.
This document describes the current status of the protocol IrOBEX (for IrDA Object Exchange, OBEX for short). OBEX is a compact, efficient, binary protocol that enables a wide range of devices to exchange data in a simple and spontaneous manner. OBEX is being defined by members of the Infrared Data Association to interconnect the full range of devices that support IrDA protocols. It is not, however, limited to use in an IrDA environment.
OBEX performs a function similar to HTTP, a major protocol underlying the World Wide Web. However, OBEX works for the many very useful devices that cannot afford the substantial resources required for an HTTP server, and it also targets devices with different usage models from the Web. OBEX is enough like HTTP to serve as a compact final hop to a device “not quite” on the Web.
A major use of OBEX is a “Push” or “Pull” application, allowing rapid and ubiquitous communications among portable devices or in dynamic environments. For instance, a laptop user pushes a file to another laptop or PDA; an industrial computer pulls status and diagnostic information from a piece of factory floor machinery; a digital camera pushes its pictures into a film development kiosk, or if lost can be queried (pulled) for the electronic business card of its owner. However, OBEX is not limited to quick connect- transfer-disconnect scenarios - it also allows sessions in which transfers take place over a period of time, maintaining the connection even when it is idle.
PCs, pagers, PDAs, phones, printers, cameras, auto-tellers, information kiosks, calculators, data collection devices, watches, home electronics, industrial machinery, medical instruments, automobiles, and office equipment are all candidates for using OBEX. To support this wide variety of platforms, OBEX is designed to transfer flexibly defined “objects”; for example, files, diagnostic information, electronic business cards, bank account balances, electrocardiogram strips, or itemized receipts at the grocery store. “Object” has no lofty technical meaning here; it is intended to convey flexibility in what information can be transferred. OBEX can also be used for Command and Control functions - directives to TVs, VCRs, overhead projectors, computers, and machinery. Finally, OBEX can be used to perform complex tasks such as database transactions and synchronization.
OBEX is designed to fulfill the following major goals:
1. Application friendly - provide the key tools for rapid development of applications.
2. Compact - minimum strain on resources of small devices.
3. Cross platform.
4. Flexible data handling, including data typing and support for standardized types - this will allow devices to be simpler to use via more intelligent handling of data inside.
5. Maps easily into Internet data transfer protocols.
6. Extensible - provide growth path to future needs like security, compression, and other extended features without burdening more constrained implementations.
7. Testable and Debuggable.
Bluetooth is short-range wireless communications technology
• Announced in May 1998 by an industry consortium (SIG)
• Low cost
• Simple, but powerful, applications
• Huge growth predicted
This project demonstrates the data exchange between a master and a single client using the form of OBEX (Object Exchange) present in Sessions layer of the Bluetooth protocol stack. The data exchange between the two entities is done through Sockets programming making use of UDP packet data exchange. Each request of data exchange gets an acknowledgement for the data received since the data is sent in the form of packets. Each packet size is fixed based on the OBEX protocol standards.
It is a cutting edge open specification that enables short range (10m – 100m) wireless connections between computers, handholds, personal digital assistants, mobile phones, camera phones, printers, digital cameras, headset, keyboards and even a computer mouse. Bluetooth wireless technology uses a globally available frequency band of 2.4 GHz, for worldwide compatibility. Bluetooth protocol stack consist of various layers each having various functionalities.
• A new Global Standard for data and voice.
• Good Bye Cables!
INTRODUCTION/OBJECTIVE
Title of the Project
Wireless communication
objective of project
To eliminate wires and cables between stationary and mobile devices, facilitates fast and smooth data and voice communication.
Introduction
The scope of the project involves the establishment of the connection between the two entities one master and the other client. Any two devices that come in contact can exchange data with the help of this bluetooth protocol stack. . The medium of exchange mostly used is electromagnetic radiations; this is one of the forms of wireless communication. Due to hardware constraints in using this wireless form of communication the best approach used in the project for data communication is through socket programming assuming a network connection.
BLUETOOTH is a Radio specification protocol for wireless connectivity between various devices having a working range between 10 m to 100m in the 2.4 GHz band. The channel is represented by a pseudo-random hopping sequence hopping through the 79 or 23 RF channels. Two or more Bluetooth devices using the same channel form a piconet. There is one master and one or more slave(s) in each piconet. The BLUETOOTH protocol stack consists of various layers each having various functionalities.
In the BLUETOOTH protocol stack, the layer just below the Applications layer is the Session layer, which makes use of OBEX functions, which initiates data exchange between the two devices.
The OBEX (OBject EXchange) is the session layer of the BLUETOOTH stack. It manages sessions and dialogues between BLUETOOTH devices. Another important function of the OBEX is to exchange objects between a set of BLUETOOTH devices. OBEX also handles multiple connections. It performs all the operations in a request-response format.
The OBEX layer is designed for use in applications of BLUETOOTH such as File Transfer, Synchronisation Profile, and Businesscard Exchange. The OBEX layer will be integrated on the stack and used in any of the devices that are BLUETOOTH specific. This layer helps in establishing the connection and maintaining the connection. It helps the dialogue control between the two entities.
The scope of the project involves the establishment of the connection between the two entities – one master and the other client. Any two devices that come in contact can exchange data with the help of this bluetooth protocol stack. The medium of exchange mostly used is electromagnetic radiations; this is one of the forms of wireless communications. Due to the hardware constraints in using this wireless form of communications, the best approach used in the project for data communication is through sockets programming assuming a network connection.
This project demonstrates the data exchange between a master and a single client using the form of OBEX (Object Exchange) present in Sessions layer of the Bluetooth protocol stack. The data exchange between the two entities is done through Sockets programming making use of UDP packet data exchange. Each request of data exchange gets an acknowledgement for the data received since the data is sent in the form of packets. Each packet size is fixed based on the OBEX protocol standards.
AN Introduction TO Object Exchange Protocol
One of the most basic and desirable uses of the IrDA infrared communication protocols is simply to send an arbitrary “thing”, or data object, from one device to another, and to make it easy for both application developers and users to do so. We refer to this as object exchange (un-capitalized), and it is the subject of the protocol described in this document.
This document describes the current status of the protocol IrOBEX (for IrDA Object Exchange, OBEX for short). OBEX is a compact, efficient, binary protocol that enables a wide range of devices to exchange data in a simple and spontaneous manner. OBEX is being defined by members of the Infrared Data Association to interconnect the full range of devices that support IrDA protocols. It is not, however, limited to use in an IrDA environment.
OBEX performs a function similar to HTTP, a major protocol underlying the World Wide Web. However, OBEX works for the many very useful devices that cannot afford the substantial resources required for an HTTP server, and it also targets devices with different usage models from the Web. OBEX is enough like HTTP to serve as a compact final hop to a device “not quite” on the Web.
A major use of OBEX is a “Push” or “Pull” application, allowing rapid and ubiquitous communications among portable devices or in dynamic environments. For instance, a laptop user pushes a file to another laptop or PDA; an industrial computer pulls status and diagnostic information from a piece of factory floor machinery; a digital camera pushes its pictures into a film development kiosk, or if lost can be queried (pulled) for the electronic business card of its owner. However, OBEX is not limited to quick connect- transfer-disconnect scenarios - it also allows sessions in which transfers take place over a period of time, maintaining the connection even when it is idle.
PCs, pagers, PDAs, phones, printers, cameras, auto-tellers, information kiosks, calculators, data collection devices, watches, home electronics, industrial machinery, medical instruments, automobiles, and office equipment are all candidates for using OBEX. To support this wide variety of platforms, OBEX is designed to transfer flexibly defined “objects”; for example, files, diagnostic information, electronic business cards, bank account balances, electrocardiogram strips, or itemized receipts at the grocery store. “Object” has no lofty technical meaning here; it is intended to convey flexibility in what information can be transferred. OBEX can also be used for Command and Control functions - directives to TVs, VCRs, overhead projectors, computers, and machinery. Finally, OBEX can be used to perform complex tasks such as database transactions and synchronization.
OBEX is designed to fulfill the following major goals:
1. Application friendly - provide the key tools for rapid development of applications.
2. Compact - minimum strain on resources of small devices.
3. Cross platform.
4. Flexible data handling, including data typing and support for standardized types - this will allow devices to be simpler to use via more intelligent handling of data inside.
5. Maps easily into Internet data transfer protocols.
6. Extensible - provide growth path to future needs like security, compression, and other extended features without burdening more constrained implementations.
7. Testable and Debuggable.
Bluetooth is short-range wireless communications technology
• Announced in May 1998 by an industry consortium (SIG)
• Low cost
• Simple, but powerful, applications
• Huge growth predicted
This project demonstrates the data exchange between a master and a single client using the form of OBEX (Object Exchange) present in Sessions layer of the Bluetooth protocol stack. The data exchange between the two entities is done through Sockets programming making use of UDP packet data exchange. Each request of data exchange gets an acknowledgement for the data received since the data is sent in the form of packets. Each packet size is fixed based on the OBEX protocol standards.
It is a cutting edge open specification that enables short range (10m – 100m) wireless connections between computers, handholds, personal digital assistants, mobile phones, camera phones, printers, digital cameras, headset, keyboards and even a computer mouse. Bluetooth wireless technology uses a globally available frequency band of 2.4 GHz, for worldwide compatibility. Bluetooth protocol stack consist of various layers each having various functionalities.
• A new Global Standard for data and voice.
• Good Bye Cables!
