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Doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 1 Importance of Overlapped BSS issue in 802.11ac Authors:

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Presentation on theme: "Doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 1 Importance of Overlapped BSS issue in 802.11ac Authors:"— Presentation transcript:

1 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 1 Importance of Overlapped BSS issue in 802.11ac Authors:

2 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 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.

3 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 3 FTTH service in Japan Number of FTTH subscribers is around 15 million and it is larger than that of ADSL subscribers. 0 5 10 15 20 25 30 35 2002200320042005200620072008 FWA CATV DSL FTTH Number of subscribers (million) Year

4 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 4 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. Source ： ROA Group, Dec. 2008 0 1 2 3 20082009201020112012 Number of subscribers (million) Year

5 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 5 Difference between currently provided services and future IPTV services TV Router ONU Ethernet: wired Network TVRouter ONU Network. High throughput services usually assume wired connection so far. Throughput evaluation of Ethernet is not necessary. STB Wireless connection should be assumed even for high throughput services. Throughput evaluation is needed to select WLAN for router. 802.11n/ac How to evaluate the throughput performance at wireless connection part?

6 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 6 How 802.11ac is used at home AP 802.11ac AP 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.

7 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 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.

8 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 8 Questions ?

9 doc.:IEEE 802.11-09/0630r1 Submission May 14th, 2009 NamesSlide 9 Straw Poll Do you think that it is important to see how 11ac devices behave in OBSS? –Yes : 31 –No : 3 –Abstain :13 Minho Cheong, ETRI and Peter Loc, Ralink March 2009 Slide 9

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