Organising Committee: Radio Announcement For Small Size League 2005

The following provides information on the allowed radio frequencies for the SSL at RoboCup 2005 (unless the team has a Japanese license). It is the responsibility of the competing teams to comply with Japanese Laws.

Non-licensed devices in Japan
On the wireless LAN
Cellular phone frequency bands in Japan

Non-licensed devices in Japan

There are 3 types of non-licensed devices.
1. Very small power devices
2. Citizen band devices
3. Small power devices

For each type of non-licensed device more detail is provided below.

1. Very small power devices
1.A
Field strength: The field strength of radiated emission from the radiator at a distance of 3 meters shall not exceed the following values.

*Note* Most of the teams 400MHz and 900MHz radio communications modules would be considered as very small power devices and operate in the 332MHZ - 10GHz category.

1.B
Field strength: The field strength of radiated emission from the radiator at a distance of 500 meters shall not exceed the 200 microvolts/m
Allowed frequencies: 13,560kHz, 27,120kHz, 40.68MHz
Use: Radio controlled air planes, Radio controlled boats, Radio microphones, etc.

2. Citizen Band devices
Peak transmit power: 500mW
Frequency: 26.9MHz - 27.2MHz

3. Small power devices
Peak transmit power: 10mW
Frequency(Hz):
Group A
73.6M - 74.8M
75.2M - 76.0M
322M - 323M
410M - 430M
440M - 470M
806M - 810M
1215M - 1260M
2400M - 2483.5M
10.5G - 10.55G
24.05G - 24.25G
59G - 66G
76G - 77G

Group B
2400M - 2483.5M
2471M - 2497M
5170M, 5190M, 5210M, 5230M
24.77G - 25.23G
27.02G - 27.46G

Note:
1) Group A is used for small power devices and Group B is used for small power data communication devices.
2) Devices should be proved legal by the testing agency.
3) See following web site for detailed frequency assignments.
http://www.tele.soumu.go.jp/search/share/plan.htm (Japanese page)
4) See following web site for more information on Group B.
http://www.tele.soumu.go.jp/j/system/ml/list.htm (Japanese page)

Regarding wireless LAN

SSL will share the radio frequencies between the Humanoid and Real-Rescue leagues, since they share the same building. The following is the proposal from the RoboCup 2005 Osaka committee.

Radio Usage in 2.4GHz band

In the 2.4GHz band the following radio usage is allowed.

- 802.11b/g: one of the channels 1, 6, 11 is assigned to the small size league, where channel 1 has a frequency 2.412GHz as its central, channel 6 has 2.437GHz and channel 11 has 2.462GHz.

- Arib std-33: two or more channels out of 24 available channels are assigned to the small size league. Arib std-33 is a standard of Japan. Its frequency ranges from 2.472GHz to 2.495 GHz.

- Blue tooth is not allowed.

Radio Usage in 5 GHz band

In the 5GHz band the following radio usage is allowed.

- 802.11a: Channels 38 and 48 are assigned to the small size league. Channel 38 has a frequency 5.190GHz as its central and channel 48 has 5.240GHz. Note: These channels are shared with the Humanoid league.

Cellular phone frequency bands in Japan

The following frequency bands are assigned to cellular phones in Japan. Don't use these frequency bands.
810 - 828, 940 - 958
832 - 834, 887 - 889
838 - 846, 893 - 901
860 - 885, 915 - 940
(Unit: MHz)

Please send all questions to the SSL OC.

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