低功耗节点利用短距离无线接口获得个人网络

　　低功耗节点利用短距离无线接口获得个人网络

　　随着越来越多的个人电子产品连接到手机和彼此之间，个人区域网络（泛网络）——跨越通常不到两米的短程网络——正在激增。用于监测活动和收集数据的个人健身和可穿戴医疗配件的最新趋势增加了短距离、可靠和廉价的PAN解决方案的需求。有时被称为“体域网”，这些短距离通信解决方案利用各种无线标准，如蓝牙（IEEE 802.15），蓝牙低能耗、ZigBee、Wi Fi（802.11），近场通信（NFC）、RFID、基于协议如OOK其他专有接口（通断键控）、频移键控（频移键控）、问（幅移键控）。

　　无论是无线PAN（WPAN）是专注于你的身体或如办公室办公的一个小房间的面积稍大，也许高达10米，在大多数情况下，距离可以由辐射功率从收发器的发射部分。因此，一个WPAN可以互连所有典型的计算和通信设备，我们已经在我们的口袋里或在桌面–也可以更专注的目的，如允许外科医生和他的团队沟通过程中的操作和监控病人没有大的杂乱的电线（图1）。

　　Figure 1： This simplistic view of a wireless personal area network shows some of the basic ways various devices will link together “turning” the user into the network hub. Devices can either communicate directly to the user or intercommunicate with each other through the WPAN.

　　WPANs are not a new concept – they have been discussed and implemented for almost three decades. However， in the last few years， the high level of integration and low power consumption of the ICs used to implement the transceivers and protocols has made the WPAN much more economically practical. The IEEE has also been developing various standards to help define potential WPAN implementations. For instance， the IEEE Std. 802.15.1-2002 defines a WPAN based on Bluetooth v1.1， which includes a specification and descriptive language model for an integrated Bluetooth media-access control sublayer. Another IEEE group （P802.15.3） was chartered to draft a high-data-rate WPAN that transfers data at 20 Mbits/s and higher.