Overview of ARIB Standards (STD-T71)
|STD Number||ARIB STD-T71|
|Standard Name||Broadband Mobile Access Communication System (CSMA)|
Among the radio equipment performing radio access communications using “5 GHz Band Radio Access Systems” regulated in Article 6 paragraph 4 item 8 of the Regulations for Enforcement of the Radio Law or “Low-power Data Communication Systems” regulated in Article 6 paragraph 4 item 4 of the Regulations for Enforcement of the Radio Law, this ARIB Standard specifies radio equipment which uses, as multiple access method, ISO/IEC 8802-11:1999 standard-based CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) method.
This system consists of radio equipment and controlling equipment with interference prevention function, and transmits and receives signals to and from data terminal equipment.
Radio equipment in this Standard basically operates in infrastructure mode, by connecting with data terminal device, etc., or by connecting, via data conversion device, to telecommunication circuit facilities. It also operates in Ad-hoc mode and performs data exchange with other equipment, by replacing data conversion device with data terminal device, in allowed channels within 5,150 MHz ~ 5,250 MHz band of indoor Low-power Data Communications Systems.
|Reference||Corresponding to IEEE802.11a|
2. Amendment History
|Ver.||Amendment or Enactment Date||Amendment summary|
|7.0||03.03.2023||This Ver.7.0 revision was prepared in line with the regulation updates by the Ministry of Internal Affairs and Communications (Amendments of Regulations for Enforcement of the Radio Law, etc. Ordinance No. 27 on July 11, 2019, and, Amendments of Regulations for Enforcement of the Radio Law, etc. Ordinance No. 59 on September 2, 2022).
Specifically, the frequency in the 5.6 GHz band was expanded (5,710-5,730 MHz 20 MHz channels were added) for unlicensed systems such as wireless LANs; the technical requirements for radar detection systems in 5.3 GHz band were revised; IEEE 802.11ax standard was supported; a maximum of 160 MHz channels were made available in the 6 GHz band (5,925-6,425 MHz); and, the 5.2GHz band (5,150-5,250MHz) usage inside automobiles was added.
|6.2||07.26.2018||This Ver.6.2 revision was prepared in line with the regulation updates to expand the use of 5 GHz band wireless LANs. Specifically, the outdoor use of 5.2 GHz band wireless LANs was enabled, and 5.2 GHz band High-power Data Communication Systems were newly defined as registered stations with high powered base stations and land mobile relay stations. In addition, the 5,030-5,091 MHz frequency of the 5 GHz band radio access system was deleted as it had been expired.|
|6.1||03.18.2014||This Ver.6.1 revision is prepared for additional listing of the IPR sheet in accordance with submission of confirmation concerning implementation right of essential industrial property right related to Ver.5.0 and Ver.6.0.|
This Ver.6.0 revision is prepared with additions of the enhancement for the transmission bandwidth (80/160 MHz) and the transmission mode of using two discontinuous 80 MHz channels at the same time corresponding to the next generation wireless LAN specification of IEEE802.11ac which implements the effective throughput of above 1 Gbit/s with using 5 GHz band.
And, the regulation amendments relevant to the Radio Law were already enforced on March 27, 2013
This Ver.5.2 revision is prepared for corresponding to the regulation maintenance of Ministry of Internal Affairs and Communications (Amendments of the Radio Equipment Regulations, etc. on March 26, 2012).
The concrete revised points are that two station classifications of a portable station and a portable base station are added for the purpose of system operation available at sea, and the confirmation for the time limit of using frequencies in the microwave landing frequency band (5,030 MHz~5,091 MHz) is extended to the end of November 2017.
Annex 1 (Leaky coaxial cable manual) of this Standard is revised with the addition of descriptions including design guidelines which is applicable to the 5 GHz Wireless Access System for the wide use, as the former specification was that the adaptation of a leaky coaxial cable for an antenna was limited only for the Indoor Low Power Data Communication System.
And, the reference document number is revised to IEEE802.11nTM-2009, and other related corrections of reference notifications, etc. are proceeded, as the final specification of IEEE802.11n was established in October, 2009.
The technical requirements for radio equipment of 20 MHz and 40 MHz systems which correspond to IEEE802.11n are added to this Standard in accordance with the Ministerial Ordinance on June28, 2007.
And, regarding to the IEEE802.11n standard the reference document is temporally written IEEE P802.11TM/D2.00 draft standard, as the final specification is expected to release in June 2009.
|4.0||05.29.2007||This Ver.4.0 revision is prepared for the addition of 5.6 GHz band frequency and its mandatory requirements in accordance with the Ministerial Ordinance in January 2007.|
|3.2||12.12.2006||The draft standards of the gain calculation method for the leaky coaxial cable antenna and the decision method for the carrier sense level are added for the adaptation of a leaky coaxial cable for an antenna in the 5 GHz Broadband Wireless Access System.|
|3.1||11.30.2005||The Ver.3.1 revision is prepared for the permissible value of spurious emission, interim measures, etc. in accordance with the amendment of the technical regulation for the permissible value of spurious emission intensity.|
(1) The revision of specifications related to the outdoor use
(2) The revision of specifications related to the indoor use frequencies
(1) The addition of specifications for the outdoor use
(2) The alteration of the Standard title