Powerline home networkink 电力载波家庭网络技术简...

Technical Specifications 陈述 PHY-layer Orthogonal Frequency Division Multiplexing (OFDM) 正交频分复用 84 carriers, in 4.5 MHz to 21 MHz band Carrier Modulation — DBPSK, DQPSK, ROBO 载波调制 Up to 14 Mbps data rate 最高传输速率 Automatic channel adaptation 自动信道适应 Forward Error Correction 前向纠错 Packet based transmission 基本传输包 In-band jammer immunity 带内抗干扰 MAC-layer 媒质访问控制层 Carrier sense multiple access with collision avoidance — CSMA/CA 载波多点接入/ 避免冲突 QoS priority classes, contention resolution and latency control to support low latency multimedia and VoIP applications Unicast, multi-cast, broadcast transmissions Privacy ensured using 56-bit DES encryption 数字加密技术 Home networking is changing the way families communicate in the home. With a home network, it is possible for all digital devices and appliances in the home to communicate with one another at high speeds. For example, two or more PCs in a home can share a printer, files, music and a single Internet connection. It is also possible to stream audio and video content from a PC to another device such as a television or jukebox. An increasing number of consumers are becoming aware(显然的) of the advantages(优势) of home networks—particularly the ability of multiple computers to share files and a single Internet connection. It is projected that by the end of 2001 about 6.1 million US households will have some form of home networking and this number is projected to grow to 15.8 million by 2004. The number of networked homes worldwide is predicted （预言）to grow from just under 5 million in 2000 to over 23 million by 2004. Home networks can be created（创造）over powerline, wireless, phone line and Ethernet technologies. it‘s technology is flexible （灵活的）enough to be used as a bridge to home networking over all of these media