LTE 1800MHz Band Re-farming Trial Case at Indosat
Toni Pribadi Head of Technology Planning PT. Indosat Tbk LTE Asia Conference Singapore 6-7 September 2011
Agenda
LTE 1800 Ecosystem Indosat LTE Trial 1800 Summary and Next Plan
2
LTE Current Worldwide Ecosystem Proportional LTE Networks by Frequency Band Second largest Ecosystem of LTE - GSM Evolution 2.3 GHz 1800 MHz TDD
15%
800 MHz
2.6 GHz 37%
1% 1 : 2100 Mhz 15% 3 : 1800 MHz 8% 4 : AWS 2% 5 : 850MHz 37% 7 : 2.6 GHz 2% 8 : 900 MHz 11 : 1500 MHz Japan 2% 12 : 700MHz lowAC 5% 3% 13 : 700MHz upC 17 : 700MHz lowC 1% 19 : 850MHz Japan 1% 8% 20 : 800 MHz EDD 4% 38 : 2.6 Ghz TDD 9% 40 : 2.3 GHz TDD 2% 41 : 2.5 GHz TDD
LTE Network Live or in Deployment : 110
Proportional LTE Device Band Support 800 MHz EDD, 10% 700MHz AT&T, 20%
1800 MHz, 10% AWS, 6% 2.6 GHz, 14%
700MHz VzW, 27%
6% 1 : 2100 Mhz 10% 3 : 1800 MHz 6% 4 : AWS 14% 7 : 2.6 GHz 2% 8 : 900 MHz 11 : 1500 MHz Japan 2% 12 : 700MHz VzW 27% 13 : 700MHz AT&T 20% 20 : 800 MHz EDD 10% 40 : 2.3 GHz TDD 2% 38 : 2.5 Ghz TDD 1%
Source : Alcatel – Lucent Analysis, June 2011
Total Current Device Model 161 Source : GSA Report : Status of the LTE Ecosystem, July 29, 2011
15% LTE Network is operating in 1800 MHz 16 LTE Devices ready support LTE 1800 MHz 3
More Operators Commit to LTE 1800
4
Current LTE Spectrum in Indonesia (1) 700 MHz 518
798 ANALOG TV BROADCAST
Digital Switchover : TV Digital implementation plan, 2018 for major Big Cities
800 MHz
900 MHz
5
Current LTE Spectrum in Indonesia (2) 1800 MHz
2300 MHz 2300
2360 Will be Auctioned
2390 WiMAX 802.16d (15 zone)
2400 USO Telkomsel
2600 MHz
Indonesian
regulatory has not allocated specific frequency band for LTE 1800 is the most possible for re-farming Technology agnostic should be applied in conjunction to new frequency fee scheme
6
Ecosystem Re-farming Frequency for LTE 1800 GSM 900
DCS 1800
UMTS 2100
Subscriber
Subs Market Share
15 MHz
5 MHz
9.5 Million
4.6%
10 MHz
20 MHz
10 MHz
42 Million
20.5%
7.5 MHz
22.5 MHz
10 MHz
95 Million
46.3%
10 MHz
5 MHz
12.5 Million
6.1%
7.5 MHz
10 MHz
40.1 Million
19.6%
7.5 MHz Source: company report
Total Mobile Subs around 205 M YE 2010. 1800 re-farming will be preferable by two operators that have 67% market share 7
Agenda
LTE 1800 Ecosystem Indosat LTE Trial 1800 Re-farming
Process for Hot Spot LTE Examining Adjacent Interference Examining Co-Channel Interference Summary and Next Plan
8
Trial Objectives
•
Promote to regulatory that Indosat is ready to refarm existing 1800 freq for LTE
•
Leading Indonesia Mobile Broadband technology
•
Gain experience with LTE in terms of performance, latency, RF behavior, and endto-end functionality. 9
Indosat LTE 1800 Trial Environment eNodeB-Bali HSS
MME
MPLS Internet
eNodeB-Surabaya Serving-GW /PDN-GW
1.Non commercial trial in building in two cities: i. eNode B NSN FMR 1/1/0, 2x2 MIMO ii. MME, S-GW/P-GW, HSS Emulator iii. User Equipment: BandLuxe C501 2.10 MHz 1800 Frequency, FDD, ARFCN 736-786: i. 1755 1765 MHz UL ii. 1850 1860 MHz DL –
BandLuxe C 501, LTE Cat 3, 2x2 MIMO, DL 100 Mbps 64 QAM , UL 50 Mbps 16 QAM
–
–
10
Re-farming 1800 MHz Frequency for Hot Spot LTE (in building) Re-farming Process: 1. Determine target KPI : LTE SINR: 25 2. Scanning for LTE frequency band. 3. Turn on LTE eNodeB. Measure SINR target. 4. Gradually clear the surrounding BTS from 10 MHz used by LTE Frequency clearance up to 4 km from LTE hot spot •
4 km
•
•
SINR 25 is achieved after clearance within 4 km in this area (urban area). The same Frequency 1800 block may be re-used out side 4 km radius. 11
Test Result LTE Transmission Bandwidth Channel Bandwidth Transmission Bandwidth (nRB x 180kHz)
180kHz
100kHz
B R
B R
B R
B R
B R
f offset 2G-LTE Carrier Spacing
LTE Transmission bandwidth configuration
Channel bandwidth (MHz) Transmission bandwidth (MHz)
1.4
3.0
5.0
10.0
15.0
20.0
1.08
2.7
4.5
9.0
13.5
18.0
3GPP TS 36.101
5 MHz
LTE Channel Bandwidth = 10.0 MHz LTE Transmission Bandwidth = 9.0 MHz (i.e. [1850.5 – 1859.5] MHz)
4.5 MHz
LTE 10.0 MHz 0.5 MHz 12
Test Result Co-channel Interference After, LTE EIRP 10mW, DCS BTS 20W
After, LTE EIRP 6mW, DCS BTS 20W
After, LTE EIRP 6mW, DCS BTS 12W
30
20
LTE needs more clean spectrum Interference planning and RF optimization is a must-do
I 10 Q S - 0 G 2
-10 -20 -30
0
10
20
30
40
50
60
70
80
LTE - DL Throughput (Mbps) DCS BTS
LTE E NODE B
UE LTE
MS DCS
Good
UE LTE
MS DCS
Average
UE LTE
MS DCS
Poor
13
Test Result Adjacent Channel Interference Before Interference
After, No Guard Band
After, 200 KHz Guard Band
After, 400 KHz Guard Band
Before Interference
After, No Guard Band
After, 200 KHz Guard Band
After, 400 KHz Guard Band
20 ) 18 s p b16 M 14 ( t u12 p h10 g u 8 o r h 6 T 4 L U 2 0
80
) s 70 p b 60 M ( t 50 u p h40 g u30 o r h20 T L D10 0 -5
0
5
10
15
SINR (dB)
20
25
30
-5
0
5
10
15
20
SINR (dB)
25
30
With SINR maintain in good level above 20:
Before Interference NO Guard Band 200 KHz Guard Band 400 KHz Guard Band
SINR
DL Tput Mbps
26.46
71.47
100%
18.70
100%
-
26.64
56.18
79%
18.69
100%
16.05
26.54
68.64
96%
18.70
100%
18.51
27.06
71.40
100%
18.70
100%
19.32
% maintain
UL Tput Mbps
% maintain
2G SQI DCS BTS
LTE E NODE B
UE LTE Good
MS DCS
UE LTE Average
MS DCS
UE LTE Poor
MS DCS
In this hot spot scenario, It requires at least 200 KHz guard band with GSM system to maintain DL performance and DCS SQI Uplink performance remain constant. 14
Test Result Throughput & Latency Test
SINR
Result
Single User Throughput Download
26.1
Avg. 71 Mbps
Single User Throughput Upload
29.4
Avg. 17 Mbps
Cell Throughput (2 users)
22
–
25
Total 70 Mbps
Cell Throughput (4 users)
20
–
25
Total 65 Mbps
Latency
23 ms
User SINR is impacted by own cell load. The more the number of users in the cell, the more is the interference thus affecting total cell throughput. further investigation 15
Agenda
LTE 1800 Ecosystem Indosat LTE Trial 1800 Summary and Next Plan
16
Summary and Next Plan Summary 1.
LTE in 1800 MHz is promising ecosystem in Indonesia.
2.
Gradual re-farming process can be done quickly by understanding the boundaries of re-farming distance radius.
3.
LTE needs cleaner spectrum. Interference planning and RF optimization is a must-do.
4.
Guard band is proposed to maintain LTE DL performance and 2G SQI. As the result of this trial, at least 200KHz guard band is needed.
5.
LTE re-farming is a potential strategy for Indosat.
Next Plan •
•
•
Further exploration of RF characteristics: macro, dense urban Business feasibility of LTE re-farming: deployment strategy, cost analysis, application Indosat will promote 1800 as LTE re-farming spectrum 17
About Indosat as a Total Solution Provider
Cellular
Fixed Voice
82% Revenue
6 % Revenue
Pre Paid : - M e n ta r i - IM 3
W i r e l es s B r o a d b a n d 3.5G
Blackberry
International Call: Satellite -SLI 001 -SLI 008 -FlatCall 01016
E n t e r p r i s e & SM E Solution
Fixed Phone:
Data Centre
-StarOne (Fixed Wireless -I n d o s a t P h o n e
Subsidiary: - IM 2
12% Revenue
In t e r n a t i o n a l & D o m e s t i c Connectivity
Post Paid : -Matrix
Fixed Data
Subsidiary: - SM T
Subsidiary: -Lintasarta -I SP L 18
Thank you
19 19
