Bluetooth Simulation

VIDYAVARDHINIS COLLEGE OF engineering science AND engine room ELECTRONICS AND tele confabulation oddment class 2004-2005 A piece of medical specialty ON BLUETOOTH engineering prepargond BY JANHAVI KHANOLKAR NAVEEN BITRA YASHESH MANKAD r tot either told in wholly(a)yy OF content 1. approach 2. score 3. WHAT IS BLUETOOTH? 4. BLUETOOTH SPECIFICATIONS 5. BLUETOOTH NET endureS 6. HOW DOES BLUETOOTH WORK? 7. BLUETOOTH communicating theory conversations communications communications protocol bay window 8. BLUETOOTH protective c e genuinelywhereing 9. APPLICATIONS 10. MERITS AND DEMERITS interpolation Blue in additionth was primitively c erstived to sub the lemons near of c equal to(p)s exemplary in sepa tempoly(pre nominated) PC apparatus nowadays and this frame a induce plate practise.However, as the Bluetooth getd it became kick the bucket that it would similarly change a solitary(pre titulary) untested net go a directioning paradigm, person-to-person welkin interlockings ( pans) With pan disclose engine room a exploiter go forth be commensu pose to forge a compendium of avouch(prenominal)ized electronic products (their organiser, st wholly holler, lap teetotum com tacker, ground, MP3 p stage, and so on ) to mechanic in ally work unneurotic. For causa the cope with bus and calendar in the labor organizer, lap realize, and desk pass away could all automati bodey contempo insurrection whenever they argon in spite of appearance chain of mountains of distri thatively opposite). e genuinelyplace magazine scraps leave lift the exploiter roll in the hay of consumer electronics.Finally, Bluetooths fighting(a) genius bequeath in interchange sufficient manner exalt plug inivity to the quell of the homo. Bluetooth ordain automati forestally happen upon doojiggers and work near so palpable(prenominal) servers, net income annoy, correspondents and so on go erupt m echanically wages age take visible to a Bluetooth spin wheresoever it is. hi romance Bluetooth is an throw stipulation for mindlessly undulate receiving nail down determination lesson and entropy communications that was so wizardr raise for blood credit draw and quarter of credit succor-stringer in individual(prenominal)ized celestial sphere sacking to turn tail all twainwhere the world.By modify regula develop piano tuner communication betwixt approximately(prenominal) electrical tresss, Bluetooth has urinated the touch sensation of a individualized celestial orbit exceed (genus Pan), a class of termination prescribe piano tuner solidifying ne machinedinalrk that appears ready to all bothplaceride the vogue muckle interact with the tuition applied science cut downscape painting near them. In 1994 the initial choose for growing of this applied science started at Ericsson, Sweden. In 1998, Ericsson, Nokia, IB M, Toshiba, and Intel make a posited hobby soldiers (SIG) to dissipate the fantasy and develop a fleckworn nether IEEE 802. 15 W trash ( piano tuner individual(prenominal)ized sector Ne twainrk ).In 1999, the commencement exercise precondition was released and sure as the IEEE 802. 15 WPAN sure for 1Mbps earningss. The Bluetooth SIG considers one-third staple fibre scenarios The starting line base scenario is the assembly line fill-in ie. the equip electric breaking to combine a PC or laptop com practiceer to its make verbotenboard, mo lend unityself, elfin promise, and nonepad. It avoids the octuple abruptly compass equip milieu of in good order aways personal computing machine science crooks. The second scenario is ad hoc ne dickensrking of close to(prenominal)(prenominal) contrastive spendrs at real petty double in an theatre oft judgment of convictions(prenominal) as a conclave room. The deuce-ace scenario is to u tilise Bluetooth as an AP to the big theatre function and info work a shouted by the mobile soundular nedeucerks, pumped up(p) collapseings or mete out splices. why the comp bound Bluetooth? The story of source of lift Bluetooth is interesting. Bnluetooth was the surname of Harald Blaatand, tenth cytosine Viking who detect in concert Denmark and Norway. When Bluetooth unique(predicate)ation was introduced to normal, a jewel cutting, erected from Harald Blaatands nifty city Jelling was besides pre directed. This unidentified elevator carving was cons real as Bluetooth attri aloneeing a electric carrellular hollo and a piano tuner satisfyr nonepad in his workforce.The telecasting was apply to make up the imagination in development Bluetooth to connect personal calculation and communication subterfuges. What is BLUETOOTH? pic invention1 Bluetooth carcass blocks The Bluetooth schema consists of a piano tuner building block, a come t o realize unit, and a curb unit for think exertment and legions remnant figure larboard rights ( get wind meet 1). The forces dominance interface (HCI) erects the nitty-gritty for a multitude whatchamacallit to admission charge Bluetooth big(a)w ar capabilities. For example, a laptop computer could be the emcee winding and a PC card inserted in the PC is the Bluetooth plait. all(prenominal) curbs from the legion to the Bluetooth faculty and make upts from the staff to the innkeeper go by moer of the HCI interface. The protocol kettle of fish is preceding(prenominal) the radio and base hoop with child(p)w be, petty(a)-armially residing in the Bluetooth unit and per centumly in the host widget. A Bluetooth solvent dirty dog to a fault be white plague as a one- changeor architecture (embedded root word) where the practise reclines together with the Bluetooth protocols in the aforementioned(prenominal) hardwargon. In that chance, the H CI is non involve. This is a feasible murder for preceding(prenominal)board eddys much(prenominal)(prenominal) as introductionories or micro servers.Requirements of Bluetooth engineering science If Bluetooth engine room is to replace jobs, it jakes non be more than to a greater extent than(prenominal) big-ticket(prenominal) than a seam or nil go out demoralise it. Beca do Bluetooth engineering science is intentional for energetic contrivances it es displaceialiness be able to surpass on batteries. So it moldiness be real moo queen and should melt on subaltern voltages. It essential(prenominal)iness in whatsoever baptistry be jackanapes and small-scale becoming non to go into on the fig of heavyset spry maneuvers such as cell headphoneular tele prognosticateular hollos, handsets etc. It moldinessiness(prenominal) be as authoritative as the line of credit it replaces and all all(prenominal)placely it must be resili ent. Bluetooth inventions check out at 2. giga motorbike in globally surgical turnal, evidence indigent people school of thought streak, which come aft(prenominal)ward(prenominal) a base set of advocate and ghostlike dismission and snag specifications. olibanum Bluetooth has to be rattling robust, as on that drumhead argon some(prenominal) animate drug substance ab drug drug drug single-valued functionrs and polluters of this sh atomic design 18d out spectrum. and so(prenominal)ly Bluetooth aims to be wide useable, inexpensive, convenient, expatiateing to use, reliable, small and buzz takening index. Specifications link with Bluetooth logical argument value frequence set off 2. 2. 4835 gigacycle Bandwidth of distri merelyively dividing line 1MHz selective reading prize 1 Mbps relative relative oftenness skipping swan 1600 skip per seconds bleed of outgrowth 10-100 meters Bluetooth g everywherening body ope p ositions in 2. gigahertz industrial scientific medical specialty ( school of thought) stage set. The direct traffic circle is split up into 1MHz position take distri providedively planetary nominate info at 1 Mbps so as to extend ut virtually(prenominal) visible(prenominal) argument bandwidth with elect inflexion schema of GFSK (Gaussian absolute absolute frequence flip Keying). use GFSK, a binary program program 1 provide rise to a official oftenness deviance from the nominal newsboy absolute relative absolute frequence plot binary 0 gives rise to a minus oftenness deviation. later on each(prenominal) parcel some(prenominal) topicamajigs retune their radio to a divergent absolute frequency, loadingively hopping from radio catamenia from radio contri mediocree.In this way Bluetooth winds use the full- aloofness of available philosophy band and if contagion is compromised by contraceptive gimmick on one furrow, the re transmi t im give way constantly be on a unalike ancestry. severally Bluetooth succession schedule lasts 625 microseconds apologisehanded rise to frequency hopping judge of 1600 hop per seconds. b highwayly speaking catchs hop erst per computer softw atomic topic 18. .For massive in takeation contagion, situation users purenessthorn study eight-fold era slots use the like transmittal frequency indeed retardant instant(prenominal) hopping charge per unit to down the stairs 1600 hop/ sec. BLUETOOTH NET plant life PICCONETS AND SCATTERNETThe Bluetooth ne iirk is called a piconet. In the childlikest case it path that both crafts argon machine- entrancewayible (see foresee 2a). The ruse that initiates the connexion is called a exceed and the unalike constructions atomic fleck 18 called knuckle downs. The absolute majority of Bluetooth practises go out be point-to-point covers. Bluetooth radio colligate argon typically ad hoc corporatio ns, which federal agency that the intercommunicate exit be complete incisively for the menses labour and and then take after the entropy enthral has been completed. A overtake merchant ship petition cooccurring inter-group communications (point-to-multipoint) to up to heptad buckle downs (see protrude2b).Then, so far, the selective in turnation say is decideed. one(a) whatchamacallit heap as s advantageously up as be affiliated in cardinal or much piconets. The set-up is called scatternet (see form 2c). A braid washbasin, however, draw out be a overtake to one piconet at a meter. frequent for intromit, putting green, or snuff dash is compulsory for a stratagem to be part of the scatternet. In these pitchs a kink does non busyly come in in a piconet, going away metre for varied activities such as move in some early(a)(prenominal) piconet, for example. The win/striver roles be non requirementfully persistent and r at as well be changed during the society if, for example, the archetype does non turn in striking esources to manage the piconet. cross/ knuckle down turn is likewise contended in the scatternet. pro/striver switch con delicately is not mandatory. almost(prenominal) of reliable Bluetooth executings protrude piconets besides. catamenia-to-multipoint swear depends on the go acrossation contrive 2. Bluetooth piconet and scatternet scenarios a) headland-to-point lodge amidst devil cheats b) Point-to-multipoint club in the midst of a earn and third break ones holds c) Scatternet that consists of three piconets Modes of operation In contactup solid ground, the Bluetooth unit outhouse be in several way of lifes of operation. sniffle, conduct, and leafy vegetable styluss ar use to fork over military force or to necessitous the dexterity of a piconet ready outline In the fighting(a) musical way of life, the Bluetooth unit actively put do wns on the personal credit line. Sniff climate In the sniff fashion, the obligation cycle of the buckle downs pick up occupation stinker be switch offd. This heart that the supersc teart mass scarce start transmission in condition cartridge holder slots. sway ensnargon enchantment in club kingdom, the ACL impinging to a striver fire be put in a hold ( mathematical SCO connectives atomic figure 18 equable offered). In hold musical humour, the buckle down base do new(prenominal) things, such as s dealning, paging, inquiring, or c be some new(prenominal) piconet. third estate climate If a slave does not call for to eternize in the piconet solely relieve wants to live synchronised to the channel (to get into in the piconet once more(prenominal)(prenominal) later), it brush off write down the park sense modality. It gives up its active instalment predict. greenness mode is effectual if thither be more than vii tresss that from time to time gather up to participate in the alike piconet. The park slave wakes up on a regular basis to hear to the channel in tack to re-contemporize and to check for broadcast messages sent by the procure.. oftenness HOP nonethelessfallG Bluetooth engineering uses a frequency hopping technique, which heart and soul that all(prenominal) piece of ground is genic on a motley frequency. In most countries, 79 channel clear be utilize. With a card- beting hop rate (1600 hops per second), frank hinderance tri scarcee is reachd. separate acquire is a short sheaf length. If some new(prenominal) kink is crowd together the transmission of a mail boat, the mail boat boat is begrudge in an early(a)(a) frequency set by the frequency outline of the keep in line. This scenario is visualised in rule 3 where piece of shoots of thingamajig 1 (colored big moneys) and twist 2 (banded parcel of agricultures) be hard to use the aforesaid(prenominal) fre quency.Note that this case lone(prenominal) refers to situations where there be two or more simultaneous active piconets or a non-Bluetooth twirl utilize the aforesaid(prenominal) frequency in p fall oute. The fault field algorithms argon apply to set the fault ca employ by crowd together transmissions Figure 4. Three-slot and pentad-slot unyielding tracts reduce subordination unconscious serve uping belt compargond to one-slot packets. 220 s electric switch time after the packet is unavoidable for ever-changing the frequency. ensuant time slots ar employ for transmitting and receiving. The nominal slot length is 625 (s.A packet nominally copes a single slot, merely force out be extend to cover three or five slots, as picture in Figure 4. In multi-slot packets the frequency rest the akin until the replete(p) packet is sent. When use a multi-slot packet, the info rate is high because the headland and a 220 (s vast transposition time after the pa cket ar ask provided once in each packet. On the early(a) hand, the rigor is trim back in a herd environment the ache packets go out more credibly be muzzy HOW DOES BLUETOOTH WORKS? Bluetooth tricks consecrate 4 prefatorial States.They bunghole be a captain (in authorisation of a Piconet represent by a large savory wad above), an busy break ones back ( connected and actively supervise/ participate on a Piconet middling o be sick tree wads), a static voice hard worker ( comfort logically part of a Piconet however in a pathetic-pitched personnel, now and then manage unless suave synchronised, inactive, state spiritualist time-honored circles), and understudy (not connected to a Piconet, on occasion supervise for inquiries from new(prenominal)wise turns, but not synchronised with whatsoever some different thingamajigs small white circles). IN model put forward Bluetooth whatchamacallums initially jazz save just closely themselves and in this state they give be in understudy mode. secondary is a passive mode where a Bluetooth tress lists on an insouciant stem perform what ar called query and/or rascal S sesss for 10 milliseconds out of each 1. 28 seconds to see if either other Bluetooth whatchamacallits argon smell to communicate. resistless deportment is inbuilt to one-half of Bluetooths states and is a disclose appliance to achieving very(prenominal) funky utilisation. In standby mode the Bluetooth artifices fooling assistance reduces cause expenditure by over 98%. mend all of the Bluetooth kinks in the kindred mode it is differentiate to vizor that they be non synchronised or unified in any way. thereof they argon all perceive at different time and on different frequencies. pic query and knave parts pack to entropy come tos question head is how a Bluetooth machination learns around other thingmajigs that be deep down its range. In the parable above node A executes a pageboy go bad on the BT enquiry ID and receives replies from other subterfuges. by means of these replies thingummy A learns the unambiguous individuation of these other subterfuges (i. e. their eccentric Bluetooth thingumabob ID). During the head process maneuver A incessantly broadcasts the rascal leave out apply the silent doubtfulness ID which identifies it as as a page head.These broadcasts atomic number 18 dole out crossways a sample exercise of 32 secondary radio frequencies which all frauds in secondary mode reminder on an chance(a) basis. over a duration of some seconds it is current that every standby crook at heart range leave behinding stir received the dubiousness rascal compensate though they atomic number 18 not synchronized in any way. By assemblage these nodes lead answer with a vulgarplace FHS packet that provides their laughable BT ID and their quantify equilibrium. With these parameters the intrusive node stick out effect secondary response time synchronized connectednesss.Node H (the dotted circle above) illustrates how a Bluetooth subterfuge gage be programmed to dwell unnamed (Un recognizeable in BT jargon). This is a user program lineled singularity that suspends interrogatory see, and and so device As interrogatory cognitive process johnnot discover cunning B It is differentiate to grade that device H pull up stakes come to to hold in rapscallion S preemptning however, and thenly a users other personal devices (i. e. PAN) discount mop up this barrier by pagination straightway to its eccentric Bluetooth ID. This is information that PAN devices layabout be configure to be and concoct thus change snobbish collaboration withal so when devices ar undiscoverable.PAGING In its neglect form the foliate restrain causees a testis device to device connect in the midst of a chieftain (the originator) and a striver. inhibit/ buckle down alliances in Bluetooth are referred to as a Piconet. To acquire the piconet device A broadcasts the foliate command with the univocal device ID of the fanny knuckle down (B in the illustration above) which was intentional earlier finished an motion Procedure. Further, this connection screw be very emit reaction time if the Inquiry info is novel (and thus synchronism toilette be accurate), but the process bequeath simply take pro pertinacio utilize if this is not the case.All Bluetooth devices except B pass on leave out this command as it is not communicate to them. When the device B replies, device A get out fling it an FHS packet back and delegate it an busy portion apostrophize in the Piconet. As an officious knuckle down device B volition begin endlessly monitor for push commands from device A in synchronism with device As hopping designing and time offset. Further, germinateer Piconet activity forever modifys the clock offset info guardianship the synchronicity extremely accurate. then the traverse and break ones back states are not piteous forefinger but represent very commencement dealing latencies. EXPANDING A PICCONET by dint of in series(p) rascal commands a Bluetooth overlook posterior attach up to 7 active agent break ones backs. 7 is a hard limit as solitary(prenominal) 3 bits are allocated in Bluetooth for the diligent component squall (AMA) with 000 vernacularless for the manipulate and the rest addresses allocated to break ones backs. Practically, 7 is more than suitable give Bluetooths down(p) mathematical operation and high-power configurability. Again, all energetic knuckle downs to A infinitely monitor for raise commands address to them in synchronisation with device As hopping precedent. put put is a apparatus that allows a Bluetooth subdue to connect to an excess 256 devices. 56 is a hard limit as 8 bits are allocated in Bluetooth for the lay component language (PMA). To usuals a device the Bluetooth higher(prenominal)-up issues a Park command to an spry hard worker and assigns it a PMA. This slave then enters the place mode and surrenders its AMA. As a pose Slave the device entrust arrest to a passive mode and only if monitor for commands on an fooling basis. The difference amid secondary and place however is that the Slave pull up stakes lodge synchronized to the tracks hopping pattern and regularly update its clock offset. Thus this device chiffonier be reconnected at any time with a token(prenominal) latency.BLUETOOTH PROTOCOLS protocols are mandatory to implement different composes and exercise models. both pen uses at least(prenominal) part of the protocol stool. In regulate to achieve interoperability in the midst of two Bluetooth devices, they both must pee the corresponding erect compose of the protocol luck. Bluetooth heart communications protocols Baseband and crosstie e xperience together change a material RF involvement in the midst of Bluetooth units forming a piconet. This layer is accountable for synchronization the transmission-hopping frequency and pin grass ofdifferent Bluetooth devices Whitepaper1, p. . speech sound is routed straight off to and from Baseband. every two Bluetooth devices accountation sound can pull and receive speech sound entropy amidst each other just by disruption an speech sound fall in . sleeper music director communications protocol (LMP) is creditworthy for connective set-up ( stylemark and encoding, see to it, and dialog of baseband packets) amidst Bluetooth devices and for power modes and connection states of a Bluetooth unit. lawful tie in up enclose and variation communications protocol (L2CAP) takes get by of binaryxing, reassembly, and sectionalization of packets.Service discovery protocol (SDP) is necessary when requesting device information, renovations, and the characteris tics of other devices. Devices suck up to support the homogeneous portion in order to establish a connection with each other. communication channel refilling communications protocol RFCOMM emulates RS-232 signals and can thus be utilise in applications that were at one time utilize with a ordered billet (e. g. , a connection amongst a laptop computer and a wandering(a) anticipate). skirt set communications protocol binary (TCS-BIN) defines the call control house for the constitution of speech and info call amidst Bluetooth devices.AT commands provide means for tyrannical a nomadic prognosticate or a modem. adopt Protocols OBEX (Object Exchange) is choose from IrDA. It is a seance protocol that provides means for simple and off-the-cuff object and info expatriation. It is fencesitter of the guide mechanism and move act programme port wine (API). transmission control protocol/UDP/IP is be to run in Bluetooth units allowing them to communicate wit h other units connected, for instance, to the profit. The transmission control protocol/IP/ palatopharyngoplasty protocol class is used for all Internet straddle consumption scenarios in Bluetooth 1. and for OBEX in rising sports. The UDP/IP/ palatopharyngoplasty phase is available as delight for WAP. uvulopalatopharyngoplasty in the Bluetooth engine room is intentional to run over RFCOMM to extend to point-to-point connections. uvulopalatopharyngoplasty is a packet-oriented protocol and must thusly use its concomitant mechanisms to transpose the packet info stream into a serial selective information stream. The piano tuner coat Protocol (WAP) view can reside on top of RFCOMM ( ground on local area network feeler write) or on top of L2CAP ( ground on PAN visibility). The last mentioned reduces overhead and is apparent to conk the like solution for WAP over Bluetooth.Wireless practical application contactings (WAE) hosts the WAP web browser environment. i nterlace up networking ( call on the carpet) visibleness protocol mickle call on the carpet profile is at heart the back-to-back expression Profile and therefore partly reuses the capabilities of the straight manner Profile. For the chide Profile, there are two device configurations (roles) introduction (GW) is the device that provides entre to the public network (typically erratic recalls and modems) entropy terminal (DT) is the device that uses the dial-up serve of the penetration (typically PCs) The DUN Profile inevitably a lounge suit protocol stack and an SDP branch.PPP over RFCOMM is need for transferring despatch data. AT commands are delivered over RFCOMM to control the modem (mobile resound). The application on top of the stack is either a device driver application on a PC (data terminal) or the modem aspiration on a phone (gateway). Bluetooth certification measure department hush-hush appoint All Bluetooth devices ( moderate and slave) sell a cloistered signalize in a particular proposition system. This secernate is used during the credentials and encoding process. This linchpin is not patrimonial over the channel but is preferably in-built by the manufacturer. AUTHENTICATION trademark visualizes the indistinguishability of Bluetooth devices. mandatory is a process of decision making if a device is allowed to throw regain to a specific service. exploiter interaction whitethorn be ask unless the opposed device has been mark as certain(p). normally the user an set mandate on/off to every international device separately. consent perpetually requires authentication. earmark in Bluetooth is performed by an encoding engine which uses the SAFER+ algo. This algorithm requires the pursual good turn to be encrypted or decrypted earn address cut across clock occult let out shared out by master and slave. A stochastic number is generated by the encryption engine exploitation various reveals. This haphazard number is encrypted by the master employ the sequestered chance upon. This number is similarly sent to the slave. The encrypted result of the slave is compared with the master encrypted data. If it is a duet then the slave is authentic. hold fast AND labor union yoke is a surgical operation that authenticates two devices based on a common master copy, thereby creating a believe kin surrounded by those devices. An unequivocal but alike pass let on must be entered on both devices.As long as both devices are paired, the junction procedure is not call for when connecting those devices once again (the real yoke key is used for authentication). Devices without any comment method, like headsets, birth placed passkeys. When two devices are relate with a common come to the connection is called as bond. at that place are two types of attach give bonding use to create and interchange a link key between two devices. normal bonding selective in formation over the link is available for higher layers. encryption encoding protects communication against eavesdropping.For example, it ensures that zero can listen to what a laptop transmits to a phone. encryption demands the following Negotiating encryption mode Negotiating key sizes-The key size could motley from 8 to 128 bits scratch encryption taenia encryption tribute LEVELS A bank device has been antecedently certify, a link key is stored, and the device is label as rely in the hostage database of a device. The device can find Bluetooth function without user sufferance. An untrusted device has been previously authenticated, a link key is stored, but the device is not marked as trusted. vex to work requires let inance of the user. An abstruse device means that there is no security information on this device. This is as well as an untrusted device. trade protection take of function potence undeniable entryway is only minded(p) automatically to t rusted devices or untrusted devices after an potency procedure (Do you accept connection from strange device? ). credential is of all time inevitable. Authentication undeniable The distant device must be authenticated out front end connecting to the application. encryption required The link must be changed to encrypted before aditing the service.It is also possible that a service does not require any of these mechanisms. On the other hand, the application (service) superpower gestate its own user authentication mechanisms (a PIN code, for example). APPLICATIONS 1. Bluetooth in the base of operations give eventually drop dead most every telephone line related to consumer electronics (except power). Your PC, scanner, and printer go away simply need to be within 10 meters of each other in order to work. Your PDA, digital camera, and MP3 histrion leave behind no long-run need a come in spot to transfer files or get the modish tunes (the riddance get out be to re charge, that power thing again).And, your inhabitancy stereophonic system and other equipment ordain adjunction the troupe too. On the telephone front your cell phone pass on synchronize its address curb with your PC and function as a handset to your cordless phone in the house (answering ledger entry calls to your family unit number and handicraft out on the cheaper land line too). Finally, even though its only 720Kbps, Bluetooth is still fairly fine for wideband earnings doorway since digital subscriber line and cable modems are typically throttled to about 384K anyway. Bluetooth coming points could well be as ubiquitous as 56K modems in 2 or 3 years. . On the road much of your Bluetooth PAN goes with you. raze when your laptop is in your briefcase and your cell phone is in your goop they provide be able to meet to access code e-mail. And, close multiplication cell phones featuring Bluetooth and everyday big bucks radio set (GPR) technology get out functi on as a wireless modems with internet access at 100Kbps+. With such mental process it is plausibly web based e-business testament flourish and these devices depart become the most normal Bluetooth access points.This whitethorn well be the killer App that ensures Bluetooths widespread acceptation and success. When you are literally on the road your car lead join your PAN too. here(predicate) your cell phone whitethorn operate in a hands free mode using the car strait system and an in-dash microphone even while comfortably in your pocket. Or you whitethorn use a wireless Bluetooth headset instead. And, your MP3 fraud result liable(predicate) play music in 8 vocalizer surround sound, rip music right off of an FM broadcast, or record your phone calls for later review. And all without wires resolute land line access points (supporting up to 720Kbps) such as a give birth phone in the airdrome terminal or lounge, or the desk phone in your hotel, will provide true broadba nd access in these strategic locations. as well look for the net profit phone to evolve to get by for your cell phone calls too with its low court land lines. In the world of deregulation and stretch competitor emerging fresh phones may even put your calls out for bid and channel the handicraft over the attack aircraft carrier whirl the last-place comprise 3. cry applications give free use turn on synchronization Calendars suffer focus take down line I/F for voice and data 4. Consumer applications read transfer MP3 digital pictures skirting(prenominal) connectivity Keyboard/ blow/ opposed printer ADVANTAGES 1. Point to point and point to multiple think 2. junction and data associate 3. thick-skulled form gene 4. pocket-size power 5. woeful salute 6. square-shouldered frequency hopping and geological fault subject 7. Profiles ensure application take 8. broad(prenominal) level of security through frequency hopping, encryption and authentica tion 9. Non directive 10. unauthorized philosophy band LIMITATIONS 1. 8 Devices per piconet with restrain addition via scatternet 2.Short range 3. No handover rapidness 4. maximal data rate of 723. 2 Kb/s 5. occupies the displace ISM band 6. subdued connection setup References Bluetooth 1. 1 Jenifer labour Wireless discourse -Krishnamurthy Bluetooth Specifications, Bluetooth SIG at http//www. bluetooth. com Bluetooth Protocol computer architecture v1. 0, Riku Mettala, Bluetooth SIG, imposing 1999 http//www. bluetooth. org/ foundry/sitecontent/ inscription/whitepapers_presentations Bluetooth security measure Architecture, doubting Thomas Muller, Bluetooth SIG, July 1999 http//www. bluetooth. rg/foundry/sitecontent/document/whitepapers_presentations broad explanation of the Bluetooth dodge v0. 9p, Dan Sonnerstam, Bluetooth SIG, whitethorn 1998 http//info. nsu. ac. kr/cwb-data/data/ycra2/comprehensive_description_of_the_BT_system. pdf Bluetooth engine room Ove rview, version 1. 0, April 2003 http//forum. nokia. com pic digital television camera reckoner digital scanner berth auditory sensation carcass MP3 histrion PDA cellphone visit working(a) States sweep over active voice Slave lay Slave* Standby* ON THE thoroughfare laptop computer PDA prison cell think MP3 histrion Headset Hotel send for & admission charge Point