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Importance of Overlapped BSS issue in 802.11ac

Importance of Overlapped BSS issue in 802.11ac. Authors:. Abstract of doc.:IEEE802.11-09/0536r0. Two possible attractive services are shown, i.e. IPTV and VoIP. Higher throughput is expected for IPTV while large number of 802.11ac devices is expected for VoIP.

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Importance of Overlapped BSS issue in 802.11ac

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  1. Importance of Overlapped BSS issue in 802.11ac Authors: Names

  2. Abstract of doc.:IEEE802.11-09/0536r0 • Two possible attractive services are shown, i.e. IPTV and VoIP. • Higher throughput is expected for IPTV while large number of 802.11ac devices is expected for VoIP. • 80MHz BW is likely to be used in 11ac. Compared to 802.11n, we anticipate - Larger number of BSSs - Smaller number of frequency channels OBSS is more likely to happen in 802.11ac compared to 802.11n. Names

  3. FTTH service in Japan Number of FTTH subscribers is around15 million and it is larger than that of ADSL subscribers. 35 FWA 30 CATV 25 DSL FTTH 20 Number of subscribers (million) 15 10 5 0 2002 2003 2004 2005 2006 2007 2008 Year Names

  4. 3 2 Number of subscribers (million) 1 0 2008 2009 2010 2011 2012 Expected IPTV Market in Japan Rapid increase in the number of IPTV subscribers is expected. There is a prediction that there will be more than 3 million IPTV subscribers in 2012. Year Source：ROA Group, Dec. 2008 Names

  5. Difference between currently provided services and future IPTV services TV Ethernet: wired ONU Network Router STB High throughput services usually assume wired connection so far. Throughput evaluation of Ethernet is not necessary. . 802.11n/ac ONU Network TV Router STB Wireless connection should be assumed even for high throughput services. Throughput evaluation is needed to select WLAN for router. How to evaluate the throughput performance at wireless connection part? Names

  6. AP AP AP AP AP AP AP AP AP 802.11ac AP How 802.11ac is used at home High quality IPTV services are provided by wireless. We can expect large number of subscribers. WLAN equipments, which attain stable and high throughput in OBSS, are expected. Names

  7. Conclusions • High quality IPTV service is one of the attractive ones provided by 802.11ac devices. • Many people will start to use WLAN for future network services. • Service providers / operators need to evaluate real throughput to choose WLANs for their routers. • Throughput evaluation in OBSS is needed to select WLANs for their routers. Names

  8. Questions ? Names

  9. March 2009 Straw Poll • Do you think that it is important to see how 11ac devices behave in OBSS? • Yes : 31 • No : 3 • Abstain :13 Slide 9 Minho Cheong, ETRI and Peter Loc, Ralink Names

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