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Development of the ubiquitous network by the cable and radio fusion type high-speed power-line communication

有线和无线电融合型高速电力线通信发展泛在网络

基本信息

批准号：
15560331
负责人：
TSUZUKI Shinji
金额：
$ 2.37万
依托单位：
Ehime University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

Research and development of ubiquitous networks have been done energetically. As the communication method, power-line communication (PLC) was used in this research. Although the conventional PLC transmitters inject signals between 100V lines, called the normal-mode injection, the proposed transmitters inject signals between a 100V line and the earth, called the phantom-mode injection. By using these two injection methods, the twice improvement of the channel capacity is aimed.Since the power-line cable has been designed for energy transmission, the injected signals with high spectrum components cannot be sealed in the cable, but the signals are emitted though feeble to space. Then the cable works as a kind of an antenna. If many lines are wired in a closed space like the interior of a room, a weak electric-magnetic field will be filled, so that radio communications can be realized. The communication performed in such a situation is called "a cable and radio fusion type PLC". It is the purpose of this research to realize the residential ubiquitous network about 100Mbps by PLC.Phantom-mode currents mainly contribute to the electromagnetic field radiation from power lines. Even if the injected mode was normal, the mode would be partly converted to the phantom mode depending on the degree of en electrical unbalance of the power-lines. Therefore it is very important to realize an accurate measurement of the degree of en electrical unbalance. The measured unbalance can affect the channel modeling.A probe for measuring LCL (Longitudinal Conversion Loss) which is the measure of the unbalance was developed in 2003. The channel modeling technique containing the degree of balance was examined in 2004, and it showed the validity experimentally using the above-mentioned LCL probe. By using this probe, the injection/extraction method of the phantom-mode signal could realize easily.

泛在网络的研究和开发得到了大力的开展。作为通信方式，电力线通信（PLC）在本研究中使用。虽然传统的PLC发射机在100 V线路之间注入信号，称为正常模式注入，但所提出的发射机在100 V线路和大地之间注入信号，称为幻象模式注入。这两种注入方式的目的是使信道容量提高一倍，由于电力线电缆是为能量传输而设计的，注入的高频谱成分的信号不能被密封在电缆中，而是通过微弱的信号发射到空间。然后电缆就像天线一样工作。如果在一个封闭的空间如室内铺设许多线路，就会充满一个微弱的电磁场，从而实现无线电通信。在这种情况下执行的通信被称为“电缆和无线电融合型PLC”。本研究的目的是利用电力线载波技术实现100 Mbps的住宅泛在网络。即使注入模式是正常的，也会根据电力线的电气不平衡程度而部分转换为幻影模式。因此，实现电机电气不平衡度的准确测量是非常重要的。测量的不平衡会影响信道建模，2003年开发了用于测量LCL（纵向转换损耗）的探头，LCL是不平衡的度量。包含平衡度的信道建模技术在2004年进行了检验，并且使用上述LCL探测器通过实验显示了有效性。利用该探头可以方便地实现体模信号的注入/提取。