| Bluetooth is the name given to a new
| |
| | transferring of information between
|
| technology standard using
| |
| | devices:Core Protocols in
|
| short-range radio links, intended to
| |
| | Bluetooth:Baseband: The Baseband and Link
|
| replace the cable(s) connecting
| |
| | Control layer enables the physical RF
|
| portable and fixed electronic devices.
| |
| | link between Bluetooth forming a
|
| The standard defines a uniform
| |
| | piconet. It provides two different
|
| structure for a wide range of devices to
| |
| | kind of physical links with their
|
| communicate with each other.Its important
| |
| | corresponding baseband packets,
|
| features of Bluetooth are robustness, low
| |
| | Synchronous Connection-Oriented and
|
| complexity,
| |
| | Asynchronous Connectionless which
|
| low power and low cost. Bluetooth is
| |
| | can be transmitted in a multiplexing
|
| considered a wireless PAN
| |
| | manner on the same RF
|
| technology that offers fast and reliable
| |
| | link.Asynchronous Connectionless (ACL)
|
| transmission for both voice
| |
| | packets are used for the
|
| and data. Bluetooth offers wireless
| |
| | transmission of data only while
|
| access to LANs, PSTN, the mobile
| |
| | Synchronous Connection-Oriented can
|
| phone network and the Internet for home
| |
| | contain either audio or a combination of
|
| or office and other hand held
| |
| | audio and information.Link Manager
|
| devices.A complete Bluetooth system will
| |
| | Protocol: The link manager protocol is
|
| require these elements:An RF portion for
| |
| | responsible for
|
| collecting and sending data or
| |
| | link set-up between Bluetooth devices.
|
| information:
| |
| | This includes setting up of
|
| A module with a baseband microprocessor
| |
| | security functions like authentication
|
| for processing function
| |
| | and encryption by generating,
|
| Memory module
| |
| | exchanging and checking of link and
|
| An interface to the electronic device
| |
| | encryption keys and the control,
|
| (such as a mobile phone, camera, or
| |
| | negotiation of baseband packet sizes and
|
| PC)The lower-layer Bluetooth protocols
| |
| | duty cycles of the Bluetooth
|
| are normally embedded in the
| |
| | radio device, and the receiving device
|
| baseband module, and the host processor
| |
| | on the other end.Logical Link Control and
|
| must support the upper-layer
| |
| | Adaptation Protocol: The Bluetooth
|
| protocols (like file transfer). In other
| |
| | logical
|
| words, the RF/baseband
| |
| | link control and adaptation protocol
|
| solution provides the means to
| |
| | (L2CAP) adapts upper layer
|
| communicate with the host, but need to
| |
| | protocols over the baseband. It can be
|
| implement a connection interface, as
| |
| | thought to work in parallel
|
| well as any upper-layer
| |
| | with LMP in difference that L2CAP
|
| protocols, to use applications supported
| |
| | provides services to the upper layer
|
| by the final product.The higher/upper
| |
| | when the payload data is never sent at
|
| layers of the Bluetooth technology called
| |
| | LMP messages.Service Discovery Protocol:
|
| as the
| |
| | Using SDP, device information, services
|
| Bluetooth profiles and these are nothing
| |
| | and the characteristics of the services
|
| but a set of protocols. These
| |
| | can be queried and after that,
|
| protocols are optimized for particular
| |
| | a connection between two or more
|
| applications. In the case of
| |
| | Bluetooth devices can be
|
| file transfer between two devices, it
| |
| | established.Telephony and Cable
|
| requires interoperability among
| |
| | Replacement Protocol:Telephony Control
|
| devices. Each of the linked devices
| |
| | protocol: Binary (TCS Binary or TCS BIN),
|
| needs to have similar applications
| |
| | a bit
|
| ensures interoperability across a
| |
| | oriented protocol, defines the call
|
| spectrum of devices.The Bluetooth stack:
| |
| | control signaling for the
|
| It has the following components:RF
| |
| | establishment of speech and data calls
|
| portion for reception and transmission
| |
| | between Bluetooth devices.RFCOMM:It is a
|
| Baseband portion with micro controller
| |
| | serial line emulation protocol and is
|
| Link control unit
| |
| | based on ETSI
|
| Link manager to support lower-layer
| |
| | 07.10 ( European Telecommunications
|
| protocols
| |
| | Standardization Institute )
|
| Interface to the host device
| |
| | specification. This protocol emulates
|
| Host processor to support upper-layer
| |
| | RS-232 control and data signals
|
| protocols
| |
| | over Bluetooth baseband, providing both
|
| L2CAP to support upper-layer
| |
| | transport capabilities for
|
| protocolsThe radio frequency (RF) portion
| |
| | upper level services that use serial
|
| provides the digital
| |
| | line as transport mechanism.Adopted
|
| signal-processing (DSP) component of the
| |
| | Protocols:PPP:PPP is the IETF
|
| system,
| |
| | Point-to-Point Protocol (Internet
|
| and the baseband micro controller
| |
| | Engineering Task
|
| processes these signals.
| |
| | Force, IETF Directory List of RFCs) and
|
| The link controller handles all the
| |
| | PPP-Networking is the means of
|
| baseband functions and supports
| |
| | taking IP packets to/from the PPP layer
|
| the link manager. It sends and receives
| |
| | and placing them onto the LAN.TCP/UDP/IP:
|
| data, identifies the sending
| |
| | TCP/IP/PPP is used for the all Internet
|
| device, performs authentication, and
| |
| | Bridge usage
|
| determines the type of frame to
| |
| | scenarios in Bluetooth 1.0 and for OBEX
|
| use for sending a transmissions. The
| |
| | in future versions. UDP/IP/PPP
|
| link controller also directs how
| |
| | is also available as transport for
|
| devices listen for transmissions from
| |
| | WAP.OBEX Protocol: IrOBEX (Short name is
|
| other devices and can move
| |
| | OBEX) is a session protocol developed
|
| devices into sleep state in order to
| |
| | by the Infrared Data Association (IrDA)
|
| save power.The link manager, located on
| |
| | to exchange data in a simple and
|
| top of the link controller, controls
| |
| | automatic way.Advantages: Using
|
| setup, authentication, link
| |
| | peer-to-peer connectivity, Bluetooth
|
| configuration, and other low-level
| |
| | technology
|
| protocols. Together, the baseband and
| |
| | simplifies personal area wireless
|
| the link manager establish
| |
| | connections, enabling all digital
|
| connections for the network.The host
| |
| | devices to communicate automaticaly.
|
| controller interface (HCI) communicates
| |
| | Bluetooth technology also
|
| the lower-layer
| |
| | provides fast, secure voice and data
|
| protocols to the host device(Like mobile
| |
| | transmissions. The range for
|
| phone, hand held PC etc).The host
| |
| | connectivity is less than 10 meters, and
|
| contains a processor.L2CAP: it supports
| |
| | line of sight is not required.
|
| the upper-layer protocols and
| |
| | The Bluetooth radio unit can functions
|
| communicates with
| |
| | even in noisy radio environments,
|
| the lower layers. The Higher/upper-layer
| |
| | ensuring audible voice transmissions in
|
| protocols consist of service-specific
| |
| | severe conditions. It can
|
| applications
| |
| | protect data by using error-correction
|
| that must be integrated into the host
| |
| | methods and provides a high
|
| application as explained above. RFCOMM
| |
| | transmission rate. It is possible
|
| protocol, which allows for the emulation
| |
| | encryption and authentication for
|
| of serial ports over the L2CAP, which is
| |
| | privacy in the transmitted data.In
|
| also an important part of Bluetooth.The
| |
| | Bluetooth ad hoc networking enables
|
| Service Discovery Protocol (SDP) gives
| |
| | personal devices to
|
| the required services and the properties
| |
| | automatically exchange information and
|
| and characteristic of the service that a
| |
| | synchronize with each other.Jith is an
|
| particular Bluetooth device is made
| |
| | Electrical and Electronic Engineer by
|
| for.The ACL Link: Bluetooth uses five
| |
| | profession from Southern india.
|
| logical channels to support
| |
| |
|
