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doc.: IEEE /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
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doc.: IEEE 802.11-13/0878r0
Submission
July 2013
Jeongki Kim, LG ElectronicsSlide 1
Efficiency enhancement for dense WLAN environment
Date: 2013-07-15Authors:
Name Affiliations Address Phone EmailJeongki Kim LG Electronics
19, Yangjea-daero 11gil, Seocho-gu,
Seoul 137-130, Korea
[email protected] Park LG Electronics [email protected] Kim LG Electronics [email protected] Seok LG Electronics [email protected] Cho LG Electronics [email protected]
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 2 Jeongki Kim, LG Electronics
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
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 4 Jeongki Kim, LG Electronics
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 5 Jeongki Kim, LG Electronics
July 2013
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 6 Jeongki Kim, LG Electronics
July 2013
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 7 Jeongki Kim, LG Electronics
July 2013
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 8 Jeongki Kim, LG Electronics
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 9 Jeongki Kim, LG Electronics
