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So#bank  WiFi  

Ryuji  Wakikawa  Deputy  Director,  Network  Division,  So4bank  

Director,  Wireline  Engineering,  Sprint  

Available

Past  

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FY2010 FY2011 FY2012 FY2013 Public

Home

FY2014

20k APs （ADSL）

200k APs （HSDPA）

450k APs （HSDPA+TD-LTE）

The  Number  of  WiFi  AP

Residential Wi-Fi Residential AP

Made by FON

Uplink 　・Ether(RJ45) Wi-Fi 　・2.4GHz(802.11b/g/n)

Wi-Fi

Fast! Slow.. 3G/LTE

FTTP ADSL CATV

Internet

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Public WiFi

1.7G/  2.1GHz

1.5GHz 2.5GHz

1.7G/2.1GHz 1.5GHz 2.5GHz 1.7G/2.1GHz 1.5GHz 2.5GHz

Wi-­‐Fi Wi-­‐Fi

1.7G/  2.1GHz

1.5GHz 2.5GHz

Traffic Load-­‐balancing  

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Wi-­‐Fi  Usage  outside 　　Pubic Hotspots

@home Residential Wi-Fi

DaytimeMorning Evening

<3G Traffic Pattern>

outside

@home

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Today  

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• Higher  Speed  to  compete  with  LTE  

• Higher  Quality  to  improve  UX  

• More  Efficiency  to  save  costs 8

Recent  WiFi  ObjecLves  

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Faster  WiFi  APs  OLD NEW

ResidenLal •  802.11  b/g/n  •  2.4GHz  •  1x1  MIMO  

•  802.11  a/b/g/n/ac  •  2.4G/5G  •  2x2  MIMO  

Short-­‐Range •  802.11  a/b/g/n  •  2.4G/5Ghz  •  2x2  MIMO  

•  802.11  a/b/g/n/ac    •  2.4G/5G  •  2x2  MIMO  

Long  Range •  802.11  a/b/g/n  •  2.4G/5Ghz  •  2x2  MIMO  

•  802.11  a/b/g/n/ac    •  2.4G/5G  •  3x3  MIMO  

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HSDPA TD-LTE ＋

HSDPA

Optical Fiber

High  UsageLow  Usage

High  SpeedLow  Speed

802.11ac(5GHz) 802.11n(5GHz) 802.11n(2.4GHz)

WiFi  Backhaul  EvoluLon  

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Beacon Adjustment Kickout FilterAssociation Filter

(Wi-Fi Signal Level)

Unstable Unstable

Switch  to  Cellular Wi-­‐Fi  a4er  stable  quality

SoftbankTypical

3G/LTE 3G/LTE WiFi

Typical

So#Bank

Quality  Control  at  WiFi  Edge  

Web  auth  

SIM  auth  (So#bank)

10-­‐16  sec  

2-­‐4sec  

Auth   Auth  

0001so4bank  

0002so4bank  

No  setup  required  and  Transparent  connecUvity  

Faster  AuthenLcaLon  (EAP  SIM)  

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VLAN1   VLAN2   VLAN3  

VLAN1  Reduce  Handover  Ume  

VLAN1   VLAN1  

10.1.1.1   10.2.2.2   10.3.3.3  

10.1.1.1  

Random  VLAN  

Organized  VLAN  

(So4bank)

10-­‐16sec

2-­‐4sec

Seamless  connecLvity    (VLAN)  

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EAP SIM

Web auth

Web auth

IntroducUon  of  EAP-­‐SIM  Client  Access  Control  @AP  

Web auth EAP

SIM EAP-SIM +New AC

EAP-­‐SIM  &  New  Controller  

Better 81%

Much Better 11%

Much Worse 4% Worse 4%

③User  QuesLonnaire  Result  

92%  posiUve  answer  out    of  those  who  felt  changes  

①Hand-­‐over  Time  

②Offload  Traffic  

Result  of  Improvement  

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Small AP

battery

WiFi  NINJA    

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Beyond  

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So#bank:  WiFi  only?

WiFi WiFi  is  NOT  Coverage  SoluLon

Limited  Seamless    ConnecLvity

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So#bank:  Network  CoordinaLon

900Mhz

1.7Ghz

2.5Ghz

WiFi

CoordinaLon    WiFi  Scabering

Today’s  So4Bank

WiFi  is  deployed  only  where  needed.

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Wireless  BB  with  surplus  LTE  Capacity  

TD-­‐LTE

LTE-­‐CPE •  Unlimited    •  Speed  110Mbps  •  4980Yen

So#bank  Air

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•  How  to  moneUze  our  WiFi  networks    (460K  Public,  4.01M  ResidenUal)  

•  Big  Data:  Time,  Space,  and  Context  Analysis  •  Mobile  MarkeLng  and  AdverLsing    

•  PotenUal  Services  •  LocaUon  Based  Service  •  Traffic  Flow  Analysis  •  Venue  Analysis  •  WiFi  Data  Management  PF

WiFi  as  Services  

1.  Increase  5GHz  Spectrum  for  Wi-­‐Fi:  455MHz  >  775MHz  2.  Enforce  Security  for  WiFi  Spots:  User  registraUon,  

authenUcaUon,  and  access  3.  Variety  of  Services  on  best-­‐in-­‐class  WiFi  Networks  

Towards  Tokyo  Olympics  2020

LocaLon  Based  Services   Cashless  Payment  &  TickeLng  MulL-­‐language  Support  

So#Bank  Proposals  

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