電力線搬送(電力線通信, 電灯線通信)通信メモ/Note of Power Line Communications (PLCs)

( modified at 2015年10月11日 )

2014

2012

2006



                                                        Measurement Frequency (MHz)  Field strength          distance
                                                                                                      (microvolts/meter)     (meters)                                                                                                             ------------------------------------------------------------------------
                                                        0.009-0.490...................... 2400/F(kHz)             300
                                                        0.490-1.705...................... 24000/F(kHz)             30
                                                        1.705-30.0.......................         30                     30


29.54243
総務省研究会、離隔距離(30m点)と10m点の電磁波減衰特性L
2−10MHz:18dB
10−30MHz:14dB
30uv/m= 29.5 dBuV/m @30m 2−10MHz:29.5+18=47.5dBuV/m @10m
10−30MHz:29.5+14=43.5dBuV/m @10m

                                                        Field strength Frequency of emission (MHz)          (microvolts/ meter)
                                                         ------------------------------------------------------------------------
                                                         30-88.....................................................         100
                                             

microvolts/metar @30m
microvolts/meter @3m
1.705M - 30MHz
30 (=29.5dBμV/m)   (=69.5dBμV/m: extrapolated using the factor 40dB/dec)
30M - 88MHz

100 (=40dBμV/m)
    • extrapolate x [dBmV/m (at 3m)] from y [mV/m (at 30m)]
      • x= 20*LOG10(y)+20
freq.

y [mV/m (at 30m)]

x [dBmV/m (at 3m)]

1.705M-10M

100

60

10M-13.553M,13.567M-26.96M, 27.28M-30M

30

49.54243

13.553M-13.567M, 26.96M-27.28M

10,000

100

   
ClassB, Quasi-Peak
   
CISPR Pub.22
FCC
  微弱無線
30MHz以下(注)
30M-230MHz
1.705 - 30MHz
30-88MHz
@3m 54.0dBuV/m (変換値:  40.5dBμV/m =[30+20(1-log10(3))], 20 dB/decade を使用) (変換値 69.5dBuV/m, 40dB/dec を使用 40dBμV/m
@10m  
都会、市街地、田園地方のいずれの場合も、35dBμV/m
30 dBμ V/m
(変換値 48.6dBuV/m, 40dB/dec を使用 (変換値: 29.5dBμV/m@10m(20 dB/decade)を使用)
@30m  
--
  29.5dBuV/m  
    (注)CISPR22には規定はないが、通信ポートの伝導妨害波許容値を規定する際の根拠値を使用

距離換算の方法 (FCC 47CFR15.31(f))

Japanese regulations


  • 微弱な無線局(電波法第4条)
    • 当該無線局の無線設備から3mの距離において、その電界強度が下記の値以下であるもの(電波法施行規則第6条)
      322MHz以下:毎メートル500μV (=20log500=54dBμV/m)
      CISPR Pub.22 classB:
        30M-230MHz:40.5dBμV/m@10m=[40.5+20(1-log3)=] 51dBμV/m@3m

 

日本国周波数分配表 [] | Frequency Allocation Table of Japan

 

Coupling Choices

Phase Coupling for Power Line Communications
  * phase coupling loss
    * Evaluating Power Line Environments Using the Echelon PLCA-22 Communication Analyzer 

characteristic impedance (Zo) of the wire

PSK modulation of Echelon PLT-21 is better than DS/SS mod. of PLT-10A ?

Japanese Activity

General References

OSGi (ホーム・ゲートウェイAPI 仕様策定)

Echelon Corp.資料

MicroSoft: Home networking Simple Control Protocol (SCP)

コー ンズ・ア・/A>塔h・カンパー・リミテッド資料

VNA

CSMA/CA

Amitava Dutta-Roy, ``Networks for Homes,''IEEE Spectrum, December, 1999, Volume 36,Number 12

網電 Networked Appliances ・/A>、究会

 field trials involving more than 500 homes and 10,000 connections.
showed 50 percent of the home-networking connections tested achieved greater than 7-Mbit/s data rates and 80 percent achieved close to the physical-layer data rate of 14 Mbits/s.
first-generation HomePlug Alliance specification. The spec, which is based on Intellon's technology, is set for release in July.



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