doc IEEE 11 -13 1114 r 1 Sept

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Simulation Scenario for Unplanned Wi-Fi Network Date: 2013 -09 -16 Authors: Name Affiliations Address Phone email Minho Cheong ETRI 161 Gajeong-dong, Yuseong-Gu, Daejoen, Korea +82 42 860 5635 minho@etri. re. kr Jae Seung Lee ETRI 161 Gajeong-dong, Yuseong-Gu, Daejoen, Korea +82 42 860 1326 jasonlee@etri. re. kr Hyoung Jin Kwon ETRI 161 Gajeong-dong, Yuseong-Gu, Daejoen, Korea +82 42 860 1698 kwonjin@etri. re. kr Sok-Kyu Lee ETRI 161 Gajeong-dong, Yuseong-Gu, Daejoen, Korea +82 42 860 5919 sk-lee@etri. re. kr Submission Slide 1 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Abstract • This presentation gives set of issues in designing simulation scenario for unplanned Wi-Fi network. Submission Slide 2 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Structure of Simulation Scenario for HEW [4] Scenario Name Topology Management Channel Model Homogeneity ~Traffic Model 1 Residential A (Apartment Bldg) Unmanaged Indoor Flat Home 2 a Enterprise 2 b Indoor Hotspot 2 c Outdoor Hotspot 3 a Outdoor Large BSS 3 b 3 c Outdoor Large BSS + Residential Outdoor Large BSS + Outdoor Hotspot B (Dense small BSSs) Managed Enterprise Indoor Flat Outdoor C (Large BSSs) C+A C+B Mobile Managed+ Unmanaged Mobile Flat Outdoor Mobile Hierarchical Mobile + Home Hierarchical Mobile • Observation in terms of unplanned Wi-Fi – Coupling between planned and unplanned is just at macro-level – Only residential is considered as unplanned – Random positioning applied only by which we cannot model the realistic environments Submission Slide 3 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Characteristics of Unplanned Wi-Fi • In all cases – (1) Unexpected position • Position of each AP is at customer’s own. Nobody knows. – (2) Unexpected active-time • Turn-on/turn-off of the AP is hardly expectable – (3) Unexpected increase in deployment • Nobody knows who newly installed AP’s in the neighborhood – (4) Uncontrollable • Wi-Fi controller cannot touch • Many low-featured AP cannot even decode the high-featured signaling – (5) Including low-featured AP’s • Most people still hesitate to buy high featured ones as private AP’s Submission Slide 4 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Characteristics of Unplanned Wi-Fi • In worst cases, additionally – (6) Invisible • AP’s SSID hidden while existing by customer’s setting – (7) Moving • Tethering devices (soft AP) can be moving Submission Slide 5 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Importance of Unplanned Scenario in HEW • Crucial reason why current Wi-Fi is so degraded – Almost 100% of Wi-Fi environments in the real world are affected – Purely planned Wi-Fi scenario hardly exists • There are no remote & safe Wi-Fi zone without any private AP • It is hardly possible to exterminate private AP’s even in a well-planned Wi-Fi environment – This is the very environments under which HEW tries to put its major effort to enhance the network performance Submission Slide 6 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Importance of Unplanned Scenario in HEW • Unplanned Wi-Fi exists everywhere as significant – Not only in the residential environments – Example #1 (indoor hot spot) • Measurement done at an underground mall (COEX in Seoul) • 44 % of all the detected AP’s near by are private AP’s • Per-STA AVG. throughput is only 3. 7 Kbps mainly due to private AP’s – While 11 b/11 g/11 n can support max. PHY 11 Mbps/54 Mbps/600 Mbps Submission Slide 7 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Importance of Unplanned Scenario in HEW • Unplanned Wi-Fi exists everywhere as significant – Not only in the residential environments – Example #2 (outdoor hot spot) • Measurement done at a train station (KTX station in Seoul) • 18 % of all the detected AP’s near by are private AP’s • Per-STA AVG. th’put is only 13. 2 Kbps mainly due to private AP’s – While 11 b/11 g/11 n can support max. PHY 11 Mbps/54 Mbps/600 Mbps Submission Slide 8 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 What We Expect from Unplanned Scenario • First, we want to check the network performance of real-world unplanned Wi-Fi network itself • Second, we really want to check the impact of unplanned Wi-Fi AP(s) which permeate the wellplanned network on it – In order to quantitatively check how much degraded the network performance goes when one or limited number of bad guys (private AP’s) are talking in the network – In order to quantitatively check how much gain we can achieve when some suggested technology (PHY or MAC) applied to the high-featured AP’s (connected to Wi-Fi controller) in the original well-planned network with small number of private AP’s Submission Slide 9 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 How to Design Unplanned Scenario • Coupling at micro-level or at macro-level? – When coupling with a well-planned Wi-Fi network to find out impact of unplanned Wi-Fi – (1) Coupling at macro-level • Multi-BSS unplanned Wi-Fi “network” + planned network • Only assuming that an apartment building is near by a football stadium – (2) Coupling at micro-level • Each private Wi-Fi AP permeates a planned network • Assuming that individual private AP may exists even in the planned – It seems that coupling with a planned network at micro-level is more realistic and more matched to the purpose of HEW – We need to define derived scenarios from the original planned one by introducing some private AP’s in it. Submission Slide 10 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 How to Design Unplanned Scenario • AP’s with the same age or different ages? – In a well-planned network, all the AP’s are usually provided at one time by one provider so that all the AP’s are in the same generation • e. g. our library Wi-Fi network has only 802. 11 n AP’s in it – But, unplanned Wi-Fi is likely to have several generations of AP’s in the neighborhood • So, my 802. 11 n AP doesn’t work so well due to neighbor’s 11 b AP – So, we need to allow several generations of AP’s in designing of unplanned Wi-Fi Submission Slide 11 Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 Suggestion • 2 levels of coupling with unplanned Wi-Fi – coupling at micro-level : – coupling at macro-level : • Multi-generations of private AP’s applied (green) Private AP modeling Scenario Name Topology Management 1 Residential A (Apartment Bldg. ) Unmanaged Random within unit 2 a Enterprise 2 b Indoor Hotspot 2 c Outdoor Hotspot B (Dense small BSSs) 1) Managed 2) Managed under attack (Managed+private AP) Random globally 3 a Outdoor Large BSS C (Large BSSs) 3 b Outdoor Large BSS + Residential C+A 3 c Outdoor Large BSS + Outdoor Hotspot C+B Submission Location Generation Channel Model Homogeneity ~Traffic Model Indoor Multi-Gen. Slide 12 Home Enterprise Flat Outdoor (11 b/11 g/11 Random n: 2. 4 GHz) globally (11 a/11 n/11 ac: 5 GHz) 1) Managed 2) Managed under attack (Managed+private AP) Managed+ Unmanaged Random overlaid network within unit 1) Managed 2) Manged under attack Random globally (Managed+private AP) Flat Mobile Flat Hierarchical Mobile + Home Hierarchical Outdoor Mobile Minho Cheong (ETRI)

doc. : IEEE 11 -13/1114 r 1 Sept. 2013 References [1] 11 -03 -0802 -23 -000 n-usage-models [2] 11 -13 -0840 -01 -0 hew-HEW-functional-requirementsfollow-up [3] 11 -13 -0556 -01 -0 hew-wi-fi-interference-measurementsin-korea [4] 11 -13 -1000 -01 -0 hew-simulation-scenarios Submission Slide 13 Minho Cheong (ETRI)