1. 平成30年6月
March 2009
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Technical requirements of Japanese regulation for 950MHz low power active radio systems
Date Submitted: March 12th, 2009
Source: [Kiyoshi Fukui], Company [Oki Electric Industry Co., Ltd.]
Contact: Kiyoshi Fukui, Oki Electric Industry Co., Ltd.
Voice: ;
Re:
Abstract: Presentation of technical requirements for 950 MHz low power radio systems.
Purpose: To encourage discussion.
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P
Kiyoshi fukui, OKI

2. March 2009
Technical requirements of Japanese regulation for 950 MHz low power active radio systems
Kiyoshi Fukui
OKI
Kiyoshi fukui, OKI

3. General conditions Communication method Contents of communications
March 2009
General conditions
Communication method
One-way method, simplex method, duplex method, semi-duplex method, or broadcast
Contents of communications
Primarily the signals for telemeter, telecontrol, and data transmission system.
Modulation system
Not specified.
Operating Frequency band
950 MHz – 956 MHz
Usage environment condition
Kiyoshi fukui, OKI

4. Transmitter (1/5) Antenna power (at antenna connector)
March 2009
Transmitter (1/5)
Antenna power (at antenna connector)
1mW or less
Exceptionally, allowed to be 10mW or less for radio channels consisting of only unit radio channel which center frequencies are from 954.2MHz to 954.8MHz
Tolerance of antenna power
Upper bound: 20%, Lower bound: -80%
Frequency tolerance
Within 20 x 10-6
Modulation method
Not specified.
Occupied frequency bandwidth
Less than (200 x n) kHz (n is integer from 1 to 3)
Kiyoshi fukui, OKI

5. Transmitter (2/5) Radio channel
March 2009
Transmitter (2/5)
Radio channel
Up to 3 consecutive unit radio channels
Unit radio channels are defined that their center frequency are located from 951.0MHz to 955.6MHz with 200kHz separation and their bandwidth are 200kHz.
For 1mW
For 10mW
Kiyoshi fukui, OKI

6. Transmitter (3/5) Adjacent channel leakage power
March 2009
Transmitter (3/5)
Adjacent channel leakage power
Level of channel edge: 20dBc
Leakage power of adjacent channel: less than -26dBm for 1mW case
less than -18dBm for 10mW case
1mW case
(200 x n) kHz
Kiyoshi fukui, OKI

7. Transmitter (4/5) Adjacent channel leakage power 10mW case March 2009
(200 x n) kHz
Kiyoshi fukui, OKI

8. Transmitter (5/5) Spurious emission strength (at antenna connector)
March 2009
Transmitter (5/5)
Spurious emission strength (at antenna connector)
f <= 1000MHz -36dBm/100kHz
(except for 710MHz < f <= 960MHz)
710MHz < f <= 945MHz -55dBm/MHz　
945MHz < f <= 950MHz -55dBm/100kHz　
950MHz < f <= 956MHz -39dBm/100kHz
(except for |f-fc|<= x(n-1)kHz)
956MHz < f <= 958MHz -55dBm/100kHz　
958MHz < f <= 960MHz -58dBm/100kHz　
1GHz < f dBm/MHz
(except for MHz < f <= MHz)
1884.5MHz < f <= MHz -55dBm/MHz
Kiyoshi fukui, OKI

9. Receiver (1/1) Conducted spurious component at receiver
March 2009
Receiver (1/1)
Conducted spurious component at receiver
f <= 1000MHz -54dBm/100kHz
(except for 710MHz < f <= 960MHz)
710MHz < f <= 945MHz -55dBm/MHz　
945MHz < f <= 950MHz -55dBm/100kHz　
950MHz < f <= 956MHz -54dBm/100kHz
956MHz < f <= 958MHz -55dBm/100kHz　
958MHz < f <= 960MHz -58dBm/100kHz　
1GHz < f dBm/MHz
(except for MHz < f <= MHz)
1884.5MHz < f <= MHz -55dBm/MHz
Kiyoshi fukui, OKI

10. Controller (1/4) Sending control 10 ms carrier sense
March 2009
Controller (1/4)
Sending control
10 ms carrier sense
Radio equipment shall stop its emission of radio signal within 1s after it starts to emit. It shall wait 100 ms or more for the consecutive emission.
However, it may emit again without waiting 100ms, if it is within 1 s after its first emission and the emission is finished within this 1 s interval.
128 us carrier sense
Radio equipment shall stop its emission of radio signal within 100 ms after it starts to emit. It shall wait 100 ms or more for the consecutive emission. The amount of sending time summed for 1 hour shall be 360 s or less.
However, it may emit again without waiting 100 ms, if it is within 100 ms after its first emission and the emission is finished within this 100 ms interval.
No carrier sense
Radio equipment shall stop its emission of radio signal within 100 ms after it starts to emit. It shall wait 100 ms or more for the consecutive emission. The amount of sending time summed for 1 hour shall be 3.6 s or less.
Comments
Duty cycle is specified by each node, not by each carrier sense mode.
Duty cycle is specifie1d in arbitrary 1 hour period, not in previous 1 hour period.
Kiyoshi fukui, OKI

11. Controller (2/4) Carrier sense (Energy detection)
March 2009
Controller (2/4)
Carrier sense (Energy detection)
Radio equipment shall check the interference existence by the carrier sense procedure before its new transmission.
Career sense shall be done to all of the unit radio channels including its emitted signal.
Carrier sense time shall be 128 us or more when the antenna power is 1mW or less.
Carrier sense time shall be 10ms or more when the antenna power is more than 1mW.
Carrier sense level that is amount of received power at all of unit radio channels including its emitted signal shall be -75dBm at the antenna input.
Carrier sense is not necessary if both of the conditions below are satisfied.
Antenna power is 1mW or less
It complies with the sending control for no carrier sense case.
Kiyoshi fukui, OKI

12. March 2009
Controller (3/4)
This table shows possible combination of sending control and carrier sense time.
Kiyoshi fukui, OKI

13. Controller (4/4) Interference protection
March 2009
Controller (4/4)
Interference protection
Radio equipment shall have a function that can send or receive identification code.
Comment
The detail of ‘Identification code’ in this term is not specified. Short address of IEEE is OK.
Kiyoshi fukui, OKI

14. Antenna Antenna gain Less than 3dBi.
March 2009
Antenna
Antenna gain
Less than 3dBi.
However, in case EIRP is less than the value 3dBi added by the above defined maximum antenna power, it is allowed to compensate the difference by the antenna gain.
For example
When the measured antenna power is 6dBm then antenna gain is allowed to be increased up to 7dBi.
Kiyoshi fukui, OKI

15. Reference: Operational Guidelines (1/3)
March 2009
Reference: Operational Guidelines (1/3)
1. Overview
1.1 Purpose
The purpose of this operational guideline is to avoid the harmful interferences to other neighboring systems or other specified low power radio stations and to achieve the efficient usage of radio and to provide the user convenience when operating 950MHz-band telemeter, telecontrol and data transmission radio equipment for specified low power radio station (call it ‘specified low power radio station’ below)
1.2 Scope of application
This operational guideline is applied to user and agency of manufacture and distributor, constructor, operator and agency of maintenance of specified low power radio station.
1.3 Target system
The target system of this operational guideline is following.
(1) 950MHz-band telemeter, telecontrol and data transmission radio equipment for specified low power radio station: ARIB STD-T96
Kiyoshi fukui, OKI

16. Reference: Operational Guidelines (2/3)
March 2009
Reference: Operational Guidelines (2/3)
2. Avoiding interference
It is desirable that the radio station specified in this standard does not use channel 7, 8, 9, 10, 11, 12, 13, 14 and 15 in consideration of the interference received from the premises radio station specified by STD-T89.
If channel 8 or channel 14 is used by premises radio station employing sub-carrier method, it is desirable that the radio station specified in this standard does not use channel 7 and 9 or channel 13 and 15 as much as possible in consideration of the interference given to the premises radio station because these channels are used by very weak response signals of the passive tag.
Appendix table 1 shows the channel plan of “950MHz-band RFID equipment for premises radio station”, “950MHz-band RFID radio equipment for specified low power radio station” and “950MHz-band telemeter, telecontrol and data transmission radio equipment for specified low power radio station”.
Kiyoshi fukui, OKI

17. Reference: Operational Guidelines (3/3)
March 2009
Reference: Operational Guidelines (3/3)
3. Influence to medical equipments
To avoid the influence to medical equipments, it is desirable to act properly according to the guideline of action described in “Study Report on the Effect of Radio Waves on Medical Devices”(Note1).
(Note1): When issuing version 1.0 of this standard (6th June, 2008), it indicates the report issued by MIC on March, However, when it is revised, it indicates the latest version.
4. Protection of privacy
For protection of privacy, it is desirable to act properly according to “Guidelines for Privacy Protection with Regard to RFID Tags”(Note2).　　
(Note2): When issuing version 1.0 of this standard (6th June, 2008), it indicates the guideline issued by MIC and METI on 8th June, However, when it is revised, it indicates the latest version.
Kiyoshi fukui, OKI