Simulation Scenario for Unplanned Wi-Fi Network May 2013 doc.: IEEE 802.11-12/xxxxr0 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 +82 42 860 1326 jasonlee@etri.re.kr Hyoung Jin Kwon +82 42 860 1698 kwonjin@etri.re.kr Sok-Kyu Lee +82 42 860 5919 sk-lee@etri.re.kr Minho Cheong (ETRI) Osama Aboul-Magd (Huawei Technologies)

Sept. 2013 Abstract This presentation gives set of issues in designing simulation scenario for unplanned Wi-Fi network. Minho Cheong (ETRI)

Structure of Simulation Scenario for HEW [4] 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 2a Enterprise B (Dense small BSSs) Managed 2b Indoor Hotspot Mobile 2c Outdoor Hotspot Outdoor 3a Outdoor Large BSS C (Large BSSs) 3b + Residential C+A Managed+ Unmanaged Hierarchical Mobile + Home 3c + Outdoor Hotspot C+B 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 Minho Cheong (ETRI)

Characteristics of Unplanned Wi-Fi 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 Minho Cheong (ETRI)

Characteristics of Unplanned Wi-Fi 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 Minho Cheong (ETRI)

Importance of Unplanned Scenario in HEW 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 Minho Cheong (ETRI)

Importance of Unplanned Scenario in HEW 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 3.7Kbps mainly due to private AP’s While 11b/11g/11n can support max. PHY 11Mbps/54Mbps/600Mbps Minho Cheong (ETRI)

Importance of Unplanned Scenario in HEW 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 11b/11g/11n can support max. PHY 11Mbps/54Mbps/600Mbps Minho Cheong (ETRI)

What We Expect from Unplanned Scenario 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 well-planned 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 Minho Cheong (ETRI)

How to Design Unplanned Scenario 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. Minho Cheong (ETRI)

How to Design Unplanned Scenario 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 802.11n AP’s in it But, unplanned Wi-Fi is likely to have several generations of AP’s in the neighborhood So, my 802.11n AP doesn’t work so well due to neighbor’s 11b AP So, we need to allow several generations of AP’s in designing of unplanned Wi-Fi Minho Cheong (ETRI)

2) Unmanaged (Managed+private AP’s) Sept. 2013 Suggestion 2 levels of coupling with unplanned Wi-Fi Red-colored (at micro-level) & blue-colored (at macro-level) Multi-generations of private AP’s applied (colored green)   Scenario Name Topology Management Private AP modeling Channel Model Homogeneity ~Traffic Model Location Generation 1 Residential A (Apartment Bldg.) Unmanaged Random within unit Multi-Gen. (11b/11g/11n: 2.4GHz) (11a/11n/11ac: 5GHz) Indoor Flat Home 2a Enterprise B (Dense small BSSs) 1) Managed 2) Unmanaged (Managed+private AP’s) Random globally 2b Indoor Hotspot Mobile 2c Outdoor Hotspot Outdoor 3a Outdoor Large BSS C (Large BSSs) 3b + Residential C+A Managed+ Unmanaged Hierarchical Mobile + Home 3c + Outdoor Hotspot C+B Minho Cheong (ETRI)

References [1] 11-03-0802-23-000n-usage-models March 2012 doc.: IEEE 802.11-12/0330r0 Sept. 2013 References [1] 11-03-0802-23-000n-usage-models [2] 11-13-0840-01-0hew-HEW-functional-requirements-follow-up [3] 11-13-0556-01-0hew-wi-fi-interference-measurements-in-korea [4] 11-13-1000-01-0hew-simulation-scenarios Minho Cheong (ETRI) Wookbong Lee, LG Electronics