什么叫“蓝牙”(二)(在线收听

 

  Air interface tailored to minimize current consumption

  Basic Technical Information—Based upon a small, high performance integrated radio transceiver, each of which is allocated a unique 48-bit address derived from the IEEE 802.standard.

  Operate in the unrestricted 2.45GHz ISM free band, Which is available globally although slight variation of location and width of band apply.

  Range set at 10m to optimize for target market of mobile and business user

  Gross data rate 1Mbit/s with second generation plans to increase to 1Mbit/s

  One-to-one connections allow maximum data transfer rate of 721kbit/s (3 voice channels)

  Uses packet switching protocol based on frequency hop scheme with 1600 hops/s to enable high performance in noisy radio environments. The entire available frequency spectrum is used with 79 hops of 1Mhz bandwidth, analogous to the IEEE 802.11 standard.

  Low power consumption longevity for battery powered devices. During data transfer the maximum current drain is 30mA. However during pauses or at lower data rates will be lower.

  无线电空中接口使电耗达到最小"蓝牙"基本技术概要

  每一个小型、高性能、集成的无线电收发机都有IEEE 802标准所规定的一个唯一的48比特位地址

  开放的2.45GHz ISM自由频段,全球都可以自由使用。

  10公里是最适于移动通信市场和商业用户的通信范围

  总速率为1Mbit/s,计划下一代产品将达到2Mbit/s

  点到点连接允许的最大数据传输速率为721kbit/s

  在无线电噪声环境里,利用基于每秒1600跳跳频表的分组交换协议可以提高系统性能。以1Mhz带宽79跳来利用这个完整的可用频谱。这类似于IEEE 802.11标准。

  低电能的消耗。在备用模式下仅需0.3mA,这能延长那些使用电池供电设备的寿命。数据传送时电流的最大消耗为30mA.当暂停工作或低速传送数据时电流消耗更低。

  原文地址:http://www.tingroom.com/listen/dianxin/24304.html