0,Introduction of Bluetooth Technology,WS KANGPrincipal EngineerNetwork Solution Lab.Corporate R&D CenterSamsung Electronics,August 30, 2000,1,Who Started Bluetooth?,The Bluetooth SIG (Special Interest Group) was formed in February 1998EricssonIBMIntelNokiaToshiba Now 9 Promoter member 3COM,LUCENT,MS ,Motorola (1999)There are 1800+ adopter companiesThe Bluetooth SIG went “public” in May 1998The Bluetooth SIG work (the spec: 1,500 pages) became public on July 26, 1999,2,The Bluetooth Technology,Creates an open industry standard to revolutionize wireless connectivity for personal and mobile devices.Substitutes a wireless air link for physical connections between electronic devices located in a single area (the piconet). Establishes rapid, ad-hoc connections between one or more devices with required security (point to point, paired, or multipoint).Permits instantaneous, effortless exchange of voice and data between suitably configured devices (the profiles).Accelerates the growth of mobile data connectivity.,3,The Bluetooth Technology,FeaturesFlexible network topologyLow energy consumptionRobust dataHigh quality voice transferBluetooth valuesTrade MarkedFreedomSimplicityReliabilityVersatilitySecurity,4,What does Bluetooth do for you?,5,What is Bluetooth?,A Short Range Wireless Communication TechnologyIntended to create Personal Area Network or PAN(s)Operating Range of 10 Meters(optional 100 meters mode)Operates in Free Scientific Communication Band2.4 GHz to 2.5 GHzProvides Multiple Levels of SecurityFrequency HoppingData WhiteningData EncodingData EncryptionTargeted at all types of DevicesWiresless Telephones(Cellular, Portables, Satellite, etc.)Computers, PDAs, Peripherals, etc.Set-top Boxes, Audio Systems, Cameras and Camcorders, etc.Comsumer Electronics, Headsets, Remote controls, etc.,6,What is in the Bluetooth Specification?,A hardware/software descriptionAn application framework,7,Sharing Common Data,Usage scenarios: Synchronization,User benefitsProximity synchronizationEasily maintained databaseCommon information database,8,Wireless Freedom,Usage scenarios: Headset,User benefitsMultiple device access Cordless phone benefitsHands free operation,9,Remote Connections.,Usage scenarios: Data access points,User benefitsNo more connectors Easy internet accessCommon connection experience,10,Bluetooth System Overview,Bluetooth Block Diagram,RFTransceiver,FLASH,BasebandProcessor,Host Processor,HCI,Bluetooth Module,Bluetooth modules include subsystems:RadioBasebandSoftware.and Applications Development Tools,DC Power,Ref Osc,8,11,Radio,frequency synthesis: frequency hopping2.402 + k MHz, k=0, , 781,600 hops per secondconversion bits into symbols: modulationGFSK (BT = 0.5; 0.28 h 0.35); 1 MSymbols/stransmit power0 dbm (up to 20dbm with power control)receiver sensitivity-70dBm 0.1% BER,12,Radio Basics: Receiver,The RF Transceiver contains both Receiver and Transmitter.The receiver selects the desired signal and removes all other signals present at the antenna (strong interferers will be present both in and out of the ISM band).The desired signal is downconverted to baseband and demodulated.A digital bit stream representing the demodulated data is output to the baseband sub-system for further processing.,AntennaFilter,LNA,RFMixer,SelectivityFilter & Gain,Demodulator,Digital data,RF energy,VCO,13,Radio Basics: Transmitter,The transmitter accepts digital data at its input and performs modulation, upconversion, filtering and amplification. The RF signal at the antenna must meet strict criteria (spectral occupancy, frequency accuracy, spurious emissions, radiated energy).,AntennaFilter,PA,RFMixer,modulator,Digital data,RF energy,VCO,14,The Baseband,The Bluetooth baseband processor manages all physical and link layer functions including low level control of the system hardwareA digital ICFunctions implemented in both hardware and software,Frame schedulingData routingCorrelation & down-samplingPacket encoding/decodingError correction encoding/error detection & correctionData whitening/de-whiteningCiphering/decipheringCRC codingBuffer PCM dataHost Controller Interface,Format conversionSample rate & receive error reconciliationRadio ControlName requestLink address inquiriesConnection set-upAuthenticationLink mode negotiation and set-up for data and voiceControl of the Bluetooth modules power mode - sniff, hold, park,15,The Bluetooth network topology,Radio designationConnected radios can be master or slaveRadios are symmetric (same radio can be master or slave)PiconetMaster can connect to 7 simultaneous or 200+ inactive (parked) slaves per piconetEach piconet has maximum capacity (1 Mbps)Unique hopping pattern/ID ScatternetHigh capacity systemMinimal impact with up to 10 piconets within rangeRadios can share piconets!,16,The Bluetooth network topology,Master / Slave relationship between DevicesMaster controls entire piconetA piconet is a group of devices controlled by one masterMaximum number of devices in a single PiconetOne Master7 Active Slave Devices255 Standby Slave DevicesDevices can participate in more than one PiconetDevices can act as slave to other PiconetsParticipation in more than on Piconet creats a scatternetSlave devices to one Piconet can be Master to Another A device can only be Master to a single PiconetMasters and Slaves can exchange rolesExchange of roles creates a new PiconetAll devices are informed and coordinated with new master,