数据通信中采取的纠错方式通常有两种，即丢弃重发和(12)。在丢弃重发方式中，当线路出错率较高时，其效率较高的控制协议是(13)。海明码属于(14)纠错方式中常用到的措施，这种方式一般适合于(15)情况。在Go Back N ARQ协议中，若窗口大小用K位二进制表示，且分别用 WT和WR表示发送窗口大小和接收窗口大小，则(16)。

(67)

(66)

(64)

(65)

(62)

Bluetooth is a universal radio interface in the(71)frequency hand that enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc networks. Each unit can simultaneously communicate with up to(72)other units per piconet. Moreover, each unit can simultaneously(73)to several piconets. Eliminates the need for wires, cables and connectors for and between cordless or mobile phones, modems, headsets, PDAs, Computers, printers, projectors, local area networks, and so on, and paves the way for new and completely different devices and applications. Technology Characteristics(74)symbol rate exploits maximum available(75)bandwidth。

(61)

(60)

(59)

(57)