1. doc.: IEEE 802.11-13/0878r0 Submission July 2013 Jeongki Kim, LG ElectronicsSlide 1 Efficiency enhancement for dense WLAN environment Date: 2013-07-15 Authors: NameAffiliationsAddressPhoneEmail Jeongki KimLG Electronics 19, Yangjea-daero 11gil, Seocho-gu, Seoul 137-130, Korea jeongki.kim@lge.com Giwon ParkLG Electronicsgiwon.park@lge.com Suhwook KimLG Electronicssuhwook.kim@lge.com Yongho SeokLG Electronicsyongho.seok@lge.com HanGyu ChoLG Electronicshg.cho@lge.com

2. doc.: IEEE 802.11-13/0878r0 Submission Abstract This contribution provides the deployment scenarios and consideration points of small BSS design for providing high MAC efficiency in dense WLAN deployment scenarios. July 2013 Slide 2Jeongki Kim, LG Electronics

3. doc.: IEEE 802.11-13/0878r0 Submission Introduction Most of HEW use cases come from dense STAs [1] –Stadium, airport or train station, exhibition hall, e-education, public transportation, lecture hall, etc. Dense STAs degrade WLAN performance because the number of STAs is beyond what AP can usually support In dense STAs environment, operator deploys many APs to cover dense STAs in the limited area, but it results in overlapped BSSs –OBSSs degrade WLAN MAC efficiency [2][3] July 2013 Jeongki Kim, LG ElectronicsSlide 3

4. doc.: IEEE 802.11-13/0878r0 Submission Planned dense WLAN environment In many usage scenarios, WLAN APs are deployed by an operator with a planned manner –E.g., E-education, Stadium, Exhibition hall, Wireless office building, Public transportation, etc In planned dense environment, small BSS (e.g., radius = 5~ 30m) can provide the high efficiency because it can reduce many OBSSs –Planned APs should be deployed with small OBSSs for high efficiency Unplanned WLAN APs (e.g., P2P, soft APs) can still exist July 2013 Slide 4Jeongki Kim, LG Electronics

5. doc.: IEEE 802.11-13/0878r0 Submission Small BSS: Deployment Scenario I Homogeneous Deployment Consist of only small BSSs General scenario Small BSSs can be overlapped each other Use cases: E-education, Wireless office, Stadium, etc. Requires many APs in order to cover the whole network. Slide 5Jeongki Kim, LG Electronics July 2013

6. doc.: IEEE 802.11-13/0878r0 Submission Small BSS: Deployment Scenario II Heterogeneous Deployment –Small BSSs are with a normal BSS coverage –Normal BSS mainly serve users which are out of small BSS range –Use cases: Stadium, E-education, Urban streets, etc. Slide 6Jeongki Kim, LG Electronics July 2013

7. doc.: IEEE 802.11-13/0878r0 Submission Consideration points for small BSS design Interference/OBSS control –Among overlapped small BSSs –Between small BSS and normal BSS Seamless connection supports –Inter small BSS –Small BSS to/from normal BSS Load balancing –STA can be transited from the high loaded BSS to low loaded BSS Slide 7Jeongki Kim, LG Electronics July 2013

8. doc.: IEEE 802.11-13/0878r0 Submission Summary We should continue to discuss about efficient Small BSS design focusing on the followings: –Interference/OBSS control –Seamless connection supports –Load balancing Need to consider existing methods (e.g., 11aa, 11ae, 11ah, 11ai, …) July 2013 Slide 8Jeongki Kim, LG Electronics

9. doc.: IEEE 802.11-13/0878r0 Submission References [1] IEEE 802.11-13/0657r1 Usage models and requirements for IEEE 802.11 High Efficiency WLAN study group (HEW SG) [2] IEEE 802.11-13/0576r3 Performance Evaluation for 11ac [3] IEEE 802.11-13/0505r0 MAC Efficiency Analysis for HEW SG July 2013 Slide 9Jeongki Kim, LG Electronics