蓝牙在智能家居中的应用.pdf

《蓝牙在智能家居中的应用.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、BluetoothinSmartHomeJerryJianjunXu2014-1-28©2012Ciscoand/oritsaffiliates.Allrightsreserved.CiscoConfidential1•BluetoothOverview•UsecasesinConnectedLife•Architecture•Chipset•SoftwareProtocol•Qualification©2012Ciscoand/oritsaffiliates.Allrightsreserved.CiscoConfidential2©2012Cisc

2、oand/oritsaffiliates.Allrightsreserved.CiscoConfidential3•Bluetoothisashort-rangeandlowpowerwirelesstechnologyoriginallydevelopedforexchangedataovershortdistancesfromfixedandmobiledevices,creatingpersonalareanetworks(PANs).•Bluetoothtechnologyoperatesintheunlicensedindustrial,s

3、cientificandmedical(ISM)bandat2.4to2.485GHz,usingspreadspectrum,frequencyhopping,full-duplexsignalatanominalrateof1600hops/sec.•CreatedbyEricssonon1994.ManagedbyBluetoothSpecialInterestGroup(SIG).•Therearefourmodeinconnectionstatus:Active,Sniff,Hold,andPark©2012Ciscoand/oritsaf

4、filiates.Allrightsreserved.CiscoConfidential4Version2.1+EDR3.0+HS4.0Publishtime2007.72009.42010.6Rate1~3Mbps24MbpsNormal:3MbpsHS:24MbpsNewFeaturesSimpleSecurePairingAlternateMAC/PHYLowcost,LowenergySniffsubratingEnhancedPowerControlReducethechannelto40EncryptionPauseUnicastConn

5、ectionlessDataFlexibletochoosesinglemodeorDualExtendedinquiryresponseGenericTestMethodologymodeLinksupervisiontimeoutFlexibletousehighspeedtechnologyQualityofserviceTypicalusecaseSmallfiletransfer.Highspeed,bigsizefileSports,fitness,healthcare,hometransferautomation©2012Ciscoan

6、d/oritsaffiliates.Allrightsreserved.CiscoConfidential5©2012Ciscoand/oritsaffiliates.Allrightsreserved.CiscoConfidential6•TwoormoreBluetoothdevicessharingthesamechannelwillformanetwork,calledPiconets.•Onedeviceactsasamasterandthedevicesconnectedtoitactasslaves•Slavecannotdirectl

7、ysendthedatatoeachother•Ineffect,themasteractsasaswitchforthepiconetandalltrafficmustpassthroughthemaster•Therecanbeupto7activeslaveinapiconetbutonlyonemaster.•Therecanbeupto255parkedslavesperpiconet©2012Ciscoand/oritsaffiliates.Allrightsreserved.CiscoConfidential7MasterActiveS

8、laveParkedSlaveStandby©2012Ciscoand/oritsaffiliates.Al