1 
 The O utline of Proposed Amendment to  Ministerial O rdinance  
 
1. Item  
Partial a mendment of Ordinance s and Notification s concerning the technical 
regulations  for enhancing 700MHz b ands intelligent transport system.  
 
2. Amendment to Ministerial Ordinance  
 Ordinance for Enforcement of the Radio Act [Partial amendment]  
 Ordinance Regulating Radio Equipment  [Partial amendment]  
 
3. Reason s for amendment  
In order to  enhance  service contents  using 700MHz bands intelligent transport 
system s (ITS) and toughen the ITS infrastruct ure, in addition to existing 
Vehicle -to-Vehicle and Vehicle -to-Infrastructure communication , the government of 
Japan establishes the technical regulations on radio equipment for 
Infrastructure -to-Infrastructure communications using 700MHz bands.  
 
4. Outline o f the amendment  
Technical Regulation on Vehicle -to-Vehicle, Vehicle -to-Infrastructure and 
Infrastructure -to-Infrastructure communications  in 760MHz Band are established as follows:   
 
General requirements  
Communication method  Communication method  shall be  broadcast communication, 
one-way communication or simplex operation.  
Frequency band  755.5MHz < f <= 764.5MHz  
 
Technical requirements for radio equipment  
Antenna power  The antenna power shall provide a mean power within a 
bandwidth of 1,000kHz of 10mW o r less.  
Tolerance of antenna power  The tolerance of a ntenna power shall be within the range of +20% 
and -50%.(fixed station and base station)  
The tolerance of a ntenna power shall be within the range of +50% 
and -50%.(mobile station)   
2 
 Tolerance of frequenc y The tolerance of  the  frequency  shall be ±20×10-6(fixed station, 
base station and mobile station) 
Modulation method  Modulation method shall be o rthogonal frequency division 
multiplexing . 
Permissible value s for 
occupied bandwidth  9MHz or less  
Transmiss ion rate  Transmission rate shall be 10 Mbps or more. (fixed station)  
Transmission rate shall be 5Mb ps or more. (base station and 
mobile station)  
Permissible value s for 
unwanted emission  intensity  Type of radio 
station  Frequency band  Limit on Secondary 
Emissi on 
Fixed 
station and 
Base 
station  f <=710MHz  Average  power shall be 2.5 
μW or less in any 100kHz 
band.  
710MHz<f<=750MHz  Average  power shall be 20 
nW or less in any 100kHz 
band.  
750MHz<f<=755MHz  Average  power shall be 
100μW or less in any 
100kHz ban d. 
765MHz<f<=770MHz  Average  power shall be 
100μW or less in any 
100kHz band.  
770MHz<f<=810MHz  Average  power shall be 
320pW or less in any 
100kHz band.  
810MHz<f<=1GHz  Average  power shall be 
2.5μW or less in any 
100kHz band.  
1GHz<f  Average  power shall be 
2.5μW or less in any 
1MHz band.   
3 
 Land mobile 
station  f<=710MHz  Average  power shall be 
2.5μW or less in any 
100kHz band.  
710MHz<f<=750MHz  Average  power shall be 
20nW or less in any 
100kHz band.  
750MHz<f<=755MHz  Average  power shall be 
100μW o r less in any 
100kHz band.  
765MHz<f<=770MHz  Average  power shall be 
100μW or less in any 
100kHz band.  
770MHz<f<=810MHz  Average  power shall be 
10nW or less in any 
100kHz band.  
810MHz<f<=1GHz  Average  power shall be 
2.5μW or less in any 
100kHz band.  
1GHz<f  Average  power shall be 
2.5μW or less in any 
1MHz band.  
Limit on secondary  
emission , etc.  Station  Frequency band  Limit on secondary  
emission  
Fixed station 
and Base 
station  f<=770MHz  Average  power shall be 
4nW or less in any 100kHz 
band.  
770MH z<f<=810MHz  Average  power shall be 
320pW or less in any 
100kHz band.  
810MHz<f<=1,000MHz  Average  power shall be 
4nW or less in any 100kHz 
band.  
1,000MHz<f  Average  power shall be  
4 
 4nW or less in any 1MHz 
band.  
land mobile 
station  
 
 f<=1,000MHz  Average  power shall be 
4nW or less in any 100kHz 
band.  
1,000MHz<f  Average  power shall be 
4nW or less in any 1MHz 
band.  
 
Controller  
Interference prevention 
function  The radio equipment shall automatically transmit  and receive 
identification sign. 
Identification sign  48 bits or more  
Carrier sens ing devic e In case of the power at a terminal of antenna  is -53dBm  or more , 
the radio wave shall not be emitted. (mobile station)  
Transmission time control  Summation  of transmission time  of Vehicle -to-Infrastructure and 
Infrastructure -to-Infrastructure communications  shall be 10.5ms 
or less  in any  100ms ( fixed station or base station) . 
Summation  of transmission  time shall be 0.66ms or less in any 
100ms and each transmission time shall be 0.33ms or less (land 
mobile station) .  
 
Antenna   
Antenna gain  The absolute gain of transmission antenna shall be 0dB or less.  
However, w hen the equivalent isotropically radiated power is less 
than the value which 10mW average  transmission  power (average 
power is 10mW in 1M Hz) is added to transmission antenna whose 
absolute gain is 0dB, it can be compensated for shortfall up to 
13dB(base station).  
When equivalent isotropically radiated power is smaller than  
5 
 value which 10mW average  transmission  power (average power is 
10mW i n 1MHz) is added to transmission antenna whose absolute 
gain is 0dB, it can be compensated for shortfall up to 5dB(mobile  
station).  
 
5. Proposed dat e of entry into force  
July, 2017