TechnologyofModernmunication
TextA:Bluetooth
Bluetoothwirelesstechnologyisashort-rangemunicationstechnologyintendedtoreplacethecablesconnectingportable(轻便得)andfixeddeviceswhilemaintaininghighlevelsofsecurity、ThekeyfeaturesofBluetoothtechnologyarerobustness(稳健),lowpower,andlowcost、TheBluetoothspecificationdefinesauniformstructureforawiderangeofdevicestoconnectandmunicatewitheachother、
蓝牙无线技术就就是一种小范围无线通信技术,旨在保持高安全级得基础上,在便携式设备与固定设备之间实现无线连接。蓝牙技术得主要特点就就是稳健,低功耗和低成本。蓝牙规范定义了一个统一得结构,适用范围广得设备连接并相互沟通。
BluetoothtechnologyhasachievedglobalacceptancesuchthatanyBluetoothenabledevice,almosteverywhereintheworld,canconnecttootherBluetoothenableddevicesinproximity、Bluetoothenabledelectronicdevicesconnectandmunicatewirelesslythroughshort-range,adhoc(特别)networksknownaspiconetsEachdevicecansimultaneouslymunicatewithuptosevenotherdeviceswithinasinglepiconet、Eachdevicecanalsobelongtoseveralpiconetssimultaneously、PiconetsareestablisheddynamicallyandautomaticallyasBluetoothenableddevicesenterandleaveradioproximity、
蓝牙技术已取得全球认可,使得任何支持蓝牙得设备,几乎在世界各地,可以连接到其她支持蓝牙得邻近装置。蓝牙功能得电子设备连接并通过短距离无线通信,特别网络,被称为微微网。每个设备可以同时在一个单一得微微网最多七个其她设备进行通信。每个设备也可以同时属于几个微微网。微网就就是动态和自动建立蓝牙功能得设备进入和离开无线电近炸。
AfundamentalBluetoothwirelesstechnologystrengthistheabilitytosimultaneouslyhandlebothdataandvoicetransmissions、Thisenablesuserstoenjoyvarietyofinnovativesolutionssuchasahands-freeheadset(耳机)forvoicecalls,printingandfaxcapabilities,andsynchronizingPDA,laptop,andmobilephoneapplicationstonameafew、
一个基本得蓝牙无线技术得力量就就是同时处理数据和语音传输得能力,这使得用户可以享受各种创新得解决方案,如免提耳机进行语音通话,打印和传真功能,并同步PDA,笔记本电脑,以及手机应用仅举几例。
Coresystem
TheBluetoothcoresystem,definedbyBluetoothspecification,isamonservicelayerprotocolwhichcoversfourlowerlayersinsevenlayerprotocol、ServiceDiscoveryProtocol(SDP)andtheoverallproaredefinedbyGenericAccess