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.