This document discusses SoftBank Mobile's deployment of a femtocell solution and IMS femtocell network architecture. It provides a brief history of SoftBank's business expansion through mergers and growth. It then summarizes SoftBank's group synergy effects across its mobile, broadband, and fixed line networks. Finally, it outlines SoftBank's selected IMS femtocell network architecture, including key components like the femtocell core and gateway.

1. Femtocell Solution and Deployment
of SoftBan Mobile
nk
18 Februa 2009
ary,
YOSHIHITO SHIMAZAKI
Deputy Division Head.
Network Division
SoftBank Mobile Corporation.,

2. History of Business Expans
sion
Merger of Vodafone Japan
Mobile Phone Subscribers:
Vodafone
15M
2006
2 Total 33 mil.
2004 Merger of Japan Telecom
Fixed Line Subscribers: 7.5M
ADSL Broadband Service *As of 2004
Domestic Share #1
2001
Capital Investment in Yahoo!
Launches Yahoo! Japan
1996
Starts Publication
Business
19
982
Japan SoftBank Corp. Established
Starts Distribution Business of Packaged Software
s
for P
PC
1981 2

3. Group Synergy Effects
SoftBank Group
111 C
Companies
i
Mobile
Broadband
d Fixed Line
3

4. SoftBank Group Network
080/090Number
PSTN
3G Handset
3G/WLAN
Dual mode Handset HLR
MSC
RNC
SoftB
Bank Mobile Internet
Femto 080/090Number Network
N t k GGSN
xDSL/FTTH SGSN HSS MGW SGW
IMS Network
SoftBank Te
elecom AAA
Networ
rk
MGCF
CSCF
Femto GW
FMC 080/090Number Yahoo! BB Network (PDG)
xDSL/FTTH Internet
4

5. Quarter Based Net Increase Rate
Net Inc
crease Rate of Share(09/01)
docomo3
32.6%
100%
KD
DDI
MNP 6.
6 4% 61.2%
80% * w/o EMOBILE
No.1
No 1
60% over the past 21 months in a row!!
40%
SoftB
Bank
do
ocomo
20%
KD
DDI
0%
Vodafone
Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4
4
FY2005 FY2006 FY2007 FY2008
-20% Source: Telecommunications
Carrier Association (TCA)
5

6. 3G Subscription Rate
(M) 2
2,2002
20.12
2,000
, 20 2G+3G Total
1,800
18
17.57
1,6006
1
2G(PDC)
1,400
14
1,2002
1 3G Users ：17.57M
Vodafone
3G Ratio ：87.3%
1,000
1 0000
1
10
*As of 2009/01
8008 3G Subscribers :18%
6006
4004
2002 ３Ｇ Users Source: Telecommunications
Carrier Association (TCA)
00
March Sep March Sep March Sep March Sep M
March Sep
March SepMarch Sep March SepMarch Sep 3
2004 2005 2006 20073月 9月
2008 6

7. 3G Penetration in JAPAN
Extremely High pe
y g penetration of 3G
100%
2G 2G
2G
Still Growth!!
2G
50% 3G 3G
3G
80% 90% 9N%
3G
60%
0%
Source: TCA
S
2006 2007 2008 2009
7

8. IMS Femto Com
mmercial Network
Archi
A hi t
itecture
it
8

9. SoftBank’s Selected Archite
ecture
Official Sites
PLMN/PSTN WAP G
GW
Non-
Non-official
Macro Core MSC SGSN GGSN
Femto Core
F Sites
(IMS)
HLR
Femto Internet
GW
RNC Provisioning (PDG)
DNS/DHCP
Configuration
SDH Ring O&M Radius
IP Bac
ckbone
xDSL
L/FTTH
Access Network
s
Macro Area
Femto AP
Femto AP WiFi AP
Femto AP
9

10. IMS Femto Core Network
3G Core Network IMS Femto Core Network
SG
GW IP-SM-GW TAS
VMS SMSC
P/S/I-CSCF
GMSCS MSCS MGCF
Other SG
GW
POTS/PLMN
3G-MGW 3G-MGW ETSI-
-CNV IM-MGW
WAP GW
MRF
HLR/FNR HSS/AAA
SG
GW
Internet
Femto
GGSN SGSN GW(PDG）
Gi Router
Gi-Router
C Plan Femto Network
3G RAN
U Pl
Plan
SDH Ring RNC
IP Backbone
10

11. Integrating with Existing NW
W
I/F
ISUP
SIP
VMS MSCS MG
GCF MRF
RTP SIP
STM SIP
3G-MGW
3G MGW IM-MGW
IM-MGW I/S-CSCF TAS
MAP RTP
Diameter SIP
MAP
HLR/FNR HSS (VLR)
S P-CSCF
P CSCF
MAP
Dia
ameter SIP
Diameter
AAA
A Femto GW
Diameter
SIP
MAP
SMSC IM-S
SM-GW
GGSN Femto AP
SGSN
3G Core Network IMS Femto Core Network
11

12. SBM Network Centre - IMS Fe
emto Core -
CSCF
IMS Femto Core Fem GW
mto
(PDG)
12

13. Area Quality Evaluation
y
-Field T i l
Fi ld Trial-
13

14. Area Coverage Quality Chec
cks
Commercially Licensed Femto AP Deployment
Internet
SoftBank Internal Employee
Trial Conducted in Tokyo SoftBank Network Centre
Metropolis and 3 Prefectures
p IMS Core
Femto GW
(PDG)
SoftBank
Yahoo BB
o!
Mobile
IP Bac
ckbone
3G Core
SBTM/NTT/KDDI docomo/KDDI
PSTN PLMN
Source：http://www.craftmap.box-i.net/
Source：http://www.craftmap.box-
Items Confirmed
rength and the outside leakage at 2 transmit
- Checked the indoor coverage area field str
power llevels (+10dB and -5dBm)
l (+10dBm d 5dB )
- Checked performance of the automatic transmit power adaptation function in relation to
the RF field strength of the macro network
14

15. Equipment Used
ADSL
Modem
Femto AP
Test UE
15

16. Indoor Measurement Result
ts
-Areas with Weak Macro Coverage with Wood Made Building-
③
Area with Weak Coverage：
Below-95dBm ⑤
② ④
①
RSCP
Femto Tx -5dBm RSCP
Femto Tx ＋10dBm
-40 -40
Femto
-50 -50
Femto
-60 -60
-70 -70
-80 -80
-90 -90
Macro
M
-100 -100
① ② ③ ④ ⑤ ① ② ③ ④ ⑤
 In one area, the Femtocell is weak  The Femtocell is dominant
16

17. Outdoor Measurement Resu
ults
-Areas with Weak Macro Coverage with Wood Made Building-
③
④ ②
⑥
Testing to check the extent of Femto ⑤ ①
⑦
RF leakage outside of buildings
⑧
RSCP Femto Tx -5dBm RSCP Femto Tx +10dBm
-40 -40
-50 -50
-60 -60 Femto
Macro
M
-70 Femto Macro -70
-80 -80
-90 -90
-100 -100
① ② ③ ④ ⑤⑥ ⑦ ⑧ ① ② ③ ④ ⑤⑥ ⑦ ⑧
 Some leakage outside
g  Leakage outside
 Macro is dominant for the most part  5m from the building, macro is
dominant
17

18. Area Coverage Quality Test Conclusions
Area coverage rate in the average Jap
panese home based upon a power
setting of +10dBm(CPICH : 0dB ) :
tti f +10dB (CPICH 0dBm) over 95%
Success rate of the transmit power con
ntrol algorithm in setting the expected
transmit power levels : over 91%
Expected result： Higher transmit p
power in areas with strong macro coverage
Lower transmit p
power in areas with weak macro coverage
Transmit power control algorithm settin range required by the average
ng
Japanese home : -5dBm --- +
+10dBm
：
Transmit power range： Necessary to conduct wider scale testing
The key is controlling
transmit power
Balancing f tor
B l i facto
Maintaining good coverage Effect on macro network
18

19. Call Quality Evaluation
y
-Field T i l
Fi ld Trial-
19

20. Call Quality Checks
Commercially Licensed Femto AP Deployment
ADSL Internet
DL: 1Mbps
s
UL: 1Mbps
s SoftBank Network Centre
IMS Core
Femto GW
(PDG)
SoftBank
Yahoo BB
o!
Femto AP Mobile
ADSL Modem IP Bac
ckbone
3G Core
VQT
ADS
SL
DL: 1Mbps SBTM/NTT/KDDI docomo/KDDI
UL: 1Mbps PSTN PLMN
Femto AP
ADSL Modem
RNC
ADSL Link Speed is fixed to
Node B 1Mbps for both U/L and D/L
Items Confirmed
- Call quality on an ADSL line （DDelay, PESQ）
-CCompared quality with th t of th M
d lit ith that f h Macro N t
he Network
k
20

21. Call Quality Measurement R
Results
Table1. Call Quality Measurement Results (Between Femto)
PESQ PESQ
Voice Delay (ms)
（male voice agja3m01.wav） (female voice agja3f01.wav)
Femto <-> Femto 286 2.95 2.69
Macro <-> Macro 199.5 2.78 2.52
 F calls within th F to network,
For ll ithi the Femto t k
Call quality is as good as for the macro network
Table2.
Table2 Call Quality Measurement Res
sults (Between Femto and Macro)
PESQ PESQ
Voice Delay (ms)
(male voiceagja3m01 wav)
voiceagja3m01.wav) (female voice agja3f01 wav)
agja3f01.wav)
F to M M to F F to M M to F F to M M to F
Femto <-> Macro 251 300 2.87 2.81 2.59 2.56
 For Femto Macro calls,
PESQ is as good as the mac network
cro
Delay in voice calls is almost good, the adjustment is being executed
t
21

22. Transmission Line Between Femtocell and Macro Network
IMS Network
MGW-side Jitter Buffer
Y!BB Network
k PDG IM-MGW
AP-side Jitter Buffer
300ms 251ms
Node-B RNC MSC MGW
Macro Network
 Solution to Delay Challenge
Finding the right Jitter Buffer value to improve call quality (delay)
o
22

23. Regulatory bar
g y rriers overcome
23

24. Process of Japan Regulator
ry (Overview)
06/02/2008 Draft idea of “Handling Policy for t Utilization of Femtocell Base Stations with regard
the
to the Radio Law, the Telecommunication Business Law and Related Ordinances (”FAP
ns
Handling Policy”)” had proposed by MIC.
07/02 -10/03/2008 Acceptance period of public comment on the “FAP Handling Policy”
17/04/2008 A
Announcement of “FAP Handling P li ”
t f H dli Policy”
the Radio Law th Telecommunications Business Law
he
May – the Diet discussions on the possible 23
3/04 – Actualization study in view of their standard
Jun./2008 revision of the Radio Law Ju
ul./2008 handling at Next Generation IP Network
Promotion Forum Fixed Mobile seamless
Fixed-Mobile
09/07/2008 The inquiry at the Radio Regulatory SWG(NGNPF-FMS), the sharing of
Council responsibility modeling WG
09/07/2008 Acceptance period of public comment on 244/10/2008 Acceptance period of public comment on the
– possible revision of the Radio Law - revised “Handling Guidelines for the
Aug./2008 211/11/2008 Telecommunications Business Law and
03/09/2008 Announcement of the result of public ordinances relevant to Femtocell Base Stations”
comment
02
2/12/2008 Announcement of “MIC Guidelines for the
18/09/2008 revision of the Radio Law will be Telecommunications Business Law and
published on an official gazette ordinances relevant to Femtocell Base Stations”
01/10/2008 Enforcement of the Radio Law and related 10
0/12/2008 Announcement of “Handling Guidelines for the
ministerial ordinances Telecommunications Business Law and
ordinances relevant to Femtocell Base Stations”
MIC：Min
nistry of Internal Affairs and Communications 24

25. Process of Japan Regulatory (O
Overview)
the Telecommunications Business Law
 Broad Band Line (xDSL, FTTH) can be used for indoor Femto cell Back hole
 Following items are contracted out for indoor Femto cell
 Spare Equipment
 Earthquake Protection
 Action of electrical Outage (
g (Battery)y)
the Radio Law
 Unlicensed Staff can do simple operation of indoor Femto cell (Relocation, Recovery)
 Simplified radio license application for indoor Femto cell
r
(Omission of Antenna LNG Lat Altitude Ab
LNG, Lat, bove sea level and Ground Height )
level, Height.)
25

26. Definition of “Femtocell” in JAPAN
Femtocell is absolutely a ba station, and defined
ase
by “Ordinance Regulating Radio Eq
Ordinance quipment
quipment” as following conditions
Should be approved by engineering sta
andards of radio facilities
Antennas:
Output Power : <= 20mWW
Transmit antenna gain
T it t i : <=2dB
2dB
Others : should no be removed easily
ot
Should be in one box and difficult to ope
en
Having a function to detect fault in Fem
mtocell and a function to stop
radio transmission.
-Having a function to stop radio transmiission automatically if it
is not possible to establish connection v communication line
via
Femtocell base stations are exclusi of application for “handover”
ion
= Femtocell base stations a not for extend “area*1”
are
*red box: newly added law by latest revision
26

27. Why SoftBank Cho an IMS-Based
ose
Femtocell A hit t ?
F t ll Architecture?
27

28. SoftBank’s Current Solution
n
Buildings
B ildi Towers
Various Indoor Base Station Types
s
Indoor Macro Micro, Pico
Femtocells Repeater
p Outdoor Macro Cells
Cells Cells
Indoor Strategy
28

29. Network Strategy (Coverage)
Indoor Coverage is Extremely Importa to Maintain Customer Satisfaction
ant
Strengthening
Situation Regarding Indoor Related Complaints
d Indoor Coverage
3G Area Coverage Satisfaction Survey (from January to September,’08)
Vehicle
2.9%
Outdoor
Indoor Complaints 79.4
4% Complaints
17.7%
0 20 40 60 80 100
Percent of Comp
plaints(%)
<Source> SoftBank Internal Documents
29

30. Existing Indoor Solutions
Where Used Solution Type
Repeater
Home
ICS Re
epeater RF Repeater
Small Store Locations
RRH/RRU PICO Cell
Large Store Locations 30

31. Network Strategy (Capacity)
Home repeaters are effective for exten
nding coverage, but Femtocells are best
for increasing capacity
Femtocell and Repeate Comparison
er
Femtocell Repeater
Capacity Better -
31

32. Network Strategy (High Speed)
Using the Femto to offload the massive expanding traffic to the fixed line network
ely
Realization of a high-speed network ba upon the idea that of giving customers
high speed ased
the feeling that they have a whole netw
work to themselves
User-to-Network ratio of 1:1
Existing 3G Core Network Femto IP Core Network
High Speed
Y!BB/S
SBTM IP Backbone
SDH Ri
Ring
xDSL/FTTH
Access Network
A
Fast, expansive and high
quality service
Mobile broadba environment for each user,
and
using br
roadband lines at home
32

33. Femto Strategy (From Network Str
rategy to New Business)
2 Phase Femtocell Strategy
SoftBank's Net Subscriber Acquisitions and An important element in the NGN
Network Usage architecture
-> Effect on Network Capacity ->New business creation
3G Packet
raffic
Tr
Time
Phase.1 Phase.２
Phase.２ 33

34. Keywords for Creating New Business Areas
w
Keyword 1 Femtocell Local Keyword 2
Camp-On/Off Information
Lo
ocal
Pu
ush
Keyw
word 3
Femtocells will become a New Revenue Driver
for Mobile Operators
34

35. The World of the Femtocell Network
Creating a bridge between users and ASPs！
ASP ASP
Company D Company C Company B Company A
Service Service Service Service
Offering Offering Offering Offering
Company C Company D Company A Company B
Security Service Advertising Mobile Gaming Health-Related
Delivery Service Service Service
OSGi F
Framework
Home
Shops
35

36. Femtocell Service Example: Outside the Home
:
Keyword 1 Keywor 2
rd Keyword 3
Out and About Checking on t home
the Mobile Notification
Service
Ａ
おでかけ安⼼
Front Door
When out of the
Living Room Window
house…
Bedroom Window
Living Room Camera
Heater
Stove
Washing Machine
Back OK
36

37. An Open System Made Poss
sible by the Femtocell
Supports a wide-ran of needs for the
nge
various market players
Wide-Rangging Industry
Partic
cipation
Content
xSP
Local Providers
Enterprises Si
ite
次世代
Authorities
相互協⼒関係 Oper
rators テク
テクノロジー
オープ
プン化
Realization of a fair Offering a highly reliable
revenue sharing
h i An interfa that
ace network and a
approach makes it ea to do
asy cutting-edge platform
busineess
SoftBank Fem
mtocell Platform
37

38. The Map of Business Model
“FemtoCell Creates New EcoSystem” on the SFP
w
3rd P t
d Party
Recommend
Ev
vent
Health
Care Information
TV Movie
En
ntertainment
SHOPPING
Art
t
IN HOME
Home
Security Shop Shopping
Home Cafe Mall
Monitoring
Gourmet
Elder- Weather Wishlist
Coupon Community
Care
Restaurant
Traffic
Environment
Game COMMUNICATION
Entertainment OUTDOOR Group
Ware
Public
Di
igital Phone
Address Service
Sig
gnage
PERSONAL Lifelog
Information
Location BUSINESS
Info IP
Location Location SUPPORT Phone
Advertising Commerce
Education
PERSONAL HOME TOWN BUSINESS SOCIETY
38

39. Schedule Status
June 2008 1Q 2009
・Start of SoftBank Internal Trial ・Femto AP Deployment
Trial
Changes to the Domestic Regulations

Telecommunications Business Law
・ Enumerated in the Femtocell Usage Guid delines
・ Enumerated in the Operational Guidelines to Ensure
s
Smooth Femto-Based Mobile Phone Service Offerings
Radio Law (Planned Effective Date Oct. 1st)
・ Revision of the Japan Radio Law
・ Revision of the Radio Law Enforcement R Regulations
・ Revision of the RF Licensing Procedure R Regulations
39

40. Conclusion
Trial Commercial IMS-Flat Network was launched from January 2009
k
Process of Japan Regul
latory was done in 2008
Application Service Trial Conduct with OSGi Platform from Now
ted
40

41. Thank You
n
41

42. Appe
ppendix
42

43. In the case of Macro 1RF
In the case of Macro 1RF w/ Fe
emto Access Control Operation
Good!!
Frequency A Frequency A
Subscribed Subscribed
User User
Frequency A Frequency B
Unsubscribed Unsubscribed
User User
Macro-Freq. A (only 1carrier) Macro-Freq. A (only 1carrier)
Femto-Freq. A Femto-Freq. B
White Spot created for unregistered user White Spot avoided for unregistered user
 To avoid White Spot for unregistere User, Different carrier is assigned
ed
to Femto Cell.
 Need to consider how to make Sub bscribed User camped on Femto cell
43

44. Process of Japan Regulatory (O
Overview)
In the case of Macro Multi RF w/ Femto Access Control Operation
/
Freq A Good!! Freq A
F No Good!!
Freq B Freq B
Freq B Freq B
F
Freq C
q Freq C
F Subscribed
Unsubscribed
User User
Unregistered User can escape to other Possibility of Trouble finding Femto cell
carrier than Femto cell. Freq B Due to no degrade of Macro Freq A,
and C
 Need to consider how to make Sub
bscribed User camped on Femto cell
For offload purpose.
p p
44