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Updated China's 5GHz Spectrum Regulation - Maximizing 802.11ac Channelization

Discover the latest update on China's 5GHz spectrum regulation, including the new spectrum for wireless access systems and proposed channelization for 802.11ac devices. Learn how to efficiently use the available bandwidth and maintain compatibility with other regions.

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Updated China's 5GHz Spectrum Regulation - Maximizing 802.11ac Channelization

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  1. Updated China's 5GHz Spectrum Regulation Date: 2013-03-18 Authors:

  2. Abstract • The latest update of China’s 5 GHz spectrum regulation is introduced, and the 11ac channelization scheme for China is analyzed.

  3. Background • In China, the total bandwidth available for 802.11ac in 5 GHz was only 125 MHz (5,725 ~ 5,850 MHz). • How to efficiently use this band was a critical issue for 802.11ac implementation in China. • R3.1.E in the 11ac spec framework points out that the 11ac draft specification shall include support for an efficient channelization in China’s (5,725 ~ 5,850 MHz) spectrum. • Although there are intensive discussions on this issue (esp. during 2010-2011 IEEE 802.11ac meetings), there is still no appropriate solution.

  4. New progress of China’s 5GHz spectrum regulation • Recently, China’s spectrum regulator, State Radio Regulatory Commission (SRRC), released a new spectrum (5,150 ~ 5,350 MHz) for wireless access systems, including Wireless LAN. • The major requirements for the new spectrum are as follows. • Frequency range: 5,150 ~ 5,350 MHz • Transmit power: 200 mW (EIRP) • Maximum PSD: 10 dBm/MHz (EIRP) • Out-of-band emission: -80 dBm/Hz (EIRP) • For devices working in 5,250 ~ 5,350 MHz • DFS shall be used. • If TPC is not used, the maximum TX power and PSD shall be reduced by 3 dB. • The above requirements are basically same as ITU-R recommendation and European regulation. For more details, please refer to SRRC’s Document [2012]620. • Now, the total spectrum of 802.11ac in China is up to 325 MHz. • 5,150 ~ 5,350 MHz • 5,725 ~ 5,850 MHz

  5. 802.11ac available spectrum in different regions US MHz 5150 5350 5725 5850 5470 Europe Japan MHz 5150 5350 5725 5470 MHz China 5150 5350 5725 5850

  6. 802.11ac channelization for China To keep compatibility and coexistence, 802.11ac channels for China should be aligned with those in other regions. China US Europe Japan

  7. Summary • China opens up a new 5GHz frequency band (5,150 ~ 5,350 MHz ), so that the total 802.11ac available spectrum is up to 325 MHz. • An 802.11ac channelization for China is proposed to maintain compatibility and coexistence of 802.11ac devices throughout the world.

  8. References • 11-11-0731-01-00ac-proposed-text-for-tgac-draft-0-1-comment-cid-812-on-china-channelization • 11-10-1259-01-00ac-channelization-for-china-s-spectrum • 11-10-0778-01-00ac-120-mhz-phy-transmission • 11-10-1062-02-00ac-rf-feasibility-120-mhz-channelization • 11-09-0992-21-00ac-proposed-specification-framework-for-tgac

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