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STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL
Embratel Star One
II International Workshop on Challenges and Trends on Broadband Wireless Mobile Access Networks – Beyond LTE-A
Guilherme Marques Mattos
Challenges and Opportunities on Testing LTE Backhaul via Satellite
CPqD, Campinas
05-06 de Novembro de 2014
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Contents
1. Embratel Star One
2. Today and Future Satellites fleet
3. Combining advantages of LTE + Satellite
4. Motivations to test LTE via satellite
5. Simulation laboratory setup
6. Real scenarios tested
7. Comparative measurements
8. Results and New Challenges
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Embratel Star One
• Star One is 100% owned by Embratel, an America Movil Company
• Largest Regional Satellite Operator in Latin America
• 7 satellites fleet + 2 new under construction
• U$800 million invested on Star One C1, C2 and C3 construction
• U$720 million invested on Star One C4 and D1 construction
• Around 200 brazilian engineers and technicians
• More than 30 years of satellite experience
• Hot position with more than 20 million dishes
• First in the world to obtain ISO 9001 Certificate on Satellite Control Services
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Embratel Star One
Star One delivers satellital infrastructure to different applications like TV, broadband networks and telephony, covering Brazil, South, Central and North America.
GUARATIBA-RJ
Control and Operation Center and Claro TV
uplink (backup)
TANGUÁ-RJ
Marketing and Support areas (Embratel),
Sales, Engineering and Regulatory (Star One)
DOWNTOWN-RJ
Control and Operation Center and Claro TV
uplink (main)
Control Centers 100% in Brazil
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL
Four Control Centers in Guaratiba, RJ
• Spacial Segment Control Center - current 6 satellites (B2, B3, B4, C1, C2, C3) - next 2 satellites (C4, D1)
• Claro hdtv Control Center - monitoring more than 170 channels (HD, SD, radio) - complex with 8 reception antennas - uplink control and monitoring
• Communications Control Center - spectrum monitoring - analysis of interferences
• Broadband Control Center - corporate networks operation - multiple networks of voice, data and video - different manufacturers and technologies
Embratel Star One
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Today and Future Satellites fleet
Star One specified, contracted and launched 9 geostationary communication satellites with success.
Co
ntr
ol C
en
ter
GU
AR
AT
IBA
Star One C3
C, Ku
Bands
C, Ku
Bands
75º W 70º W
Star One C2
65º W Star One C1
C, Ku
Bands
Ku Band (GHz): 13,75 - 14,50 (Up) / 10,95 - 12,20 (Dw)
3rd gen: C1, C2, C3
1st gen: A1, A2
C Band (GHz): 5,850 - 6,425 (Up) / 3,625 - 4,200 (Dw)
C Band C Band
(Inclined Orbit)
Brasilsat B3
84º W Brasilsat B2
63º W Brasilsat B4
92º W
C Band
(Inclined Orbit)
2nd gen: B1, B2, B3, B4
Star One D1
C, Ku, Ka
Under construction
Forecast 1Q / 2016
Ka Band (GHz): 27,00 - 30,00 (Up) / 17,70 - 20,20 (Dw)
4th gen: D1
Star One C4
Ku
Under construction
Forecast 2Q / 2015
Co-location
C2-C4
, C4
C Band
(SES NSS-10)
Star One C12 37,5º W
, C12
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL
Satellite characteristics:
• Manufacturer: Space Systems Loral (SSL)
• Plataform: SSL 1300
• Total Mass: around 5680 Kg
• Contractual Life: 15 years
• Orbital Position: 70°W
• Capacity: 48 transponders in Ku Band
Launch:
• Forecast: 2Q/2015
• Launcher Vehicle: Ariane 5
• Launch Base: Kourou Space Center – French Guyana
Satellite Star One C4
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Satellite Star One C4 - Coverages
BRAK Brazil Ku Band - DTH - VSAT - SNG
WLAK West of Latin America Ku Band - DTH - VSAT
COMK CONUS and Mexico Ku Band - VSAT
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL
Satellite characteristics:
• Contractual Life: 15 years
• Orbital Position: 84°W
• 3 Payloads:
28 transponders in C Band 24 transponders in Ku Band 18 transponders in Ka Band
• Capacity in Ka Band:
Spot beams covering Brazil territory Around 20Gbps data traffic Two geographical diversity gateways in Brazil
– Gateway South: Guaratiba (Main) Tanguá (Diversity) – Gateway North: under evaluation
Launch:
• Forecast: 1Q/2016
• Launcher Vehicle: Ariane 5
• Launch Base: Kourou Space Center – French Guyana
Satellite Star One D1
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Satellite Star One D1 - Coverages
WSAK West of South America Ku Band - VSAT
MCAK Mexico and Central America Ku Band - VSAT
BSAC Brazil and South America C Band - Video - Telephony - Cellular Backhaul - VSAT
BRAK Brazil Ku Band - VSAT
BBKA Brazil Beams Ka Band - Cellular Backhaul - Video - Broadband
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Combining Advantages of LTE + Satellite
• Continental or spot beams (cells) coverages
• Fast and easy implementation on rural and remote areas
• Cost of remote site is lower than fiber and radio
• Works with poin-to-point dedicated or star shared mode
simetric 128Kbps up to 155Mbps (dedicated)
(as)simetric up to 100Mbps/8Mbps (shared)
• Small antennas (0,60m up to 3,6m) on remote sites
depending on applications, mode, frequency band
• Delay and jitter compensations with TCP and HTTP
acceleration
• Support to data, voice, VoIP, video, multicast, EFT, etc
• Backhauling independent of terrestrial facilities and
mobile radio spectrum
Satellite Advantages LTE Advantages
• All IP mobile network
• Support to data, voice, VoIP, video, etc
• Higher rates for mobile applications
• Support high mobility
• Lower cost per bit
• Spectrum flexibility (450MHz, 700MHz, 2.5GHz, etc)
• New OFDM (Dw) and SC-FDMA (Up) techniques
• Improved spectral efficiency
• Reduced delay compared with past generations 2G, 3G
• High degree of flexibility and scenarios applications
• Effective QoS mechanisms
• World wide standard acceptance
• Well defined roadmap
• Helping mobile operator to meet regulatory obligations • Sites can switchover between dedicated and shared mode
depending on traffic demand
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Motivations to test LTE via satellite
• Getting the first impression in terms of performance when combining both technologies (LTE + Satellite);
• Configuring and optimizing LTE temporizations and protocols to support geostationary communication satellite delays;
• Identifying which and how the parameters on satellite network must be ajusted to provide a good performance to the solution;
• Finding the best elements that fit to the solution in order to provide the best results;
• Taking advantage of satellites facilities like continental coverage and fast implementation;
• Finding alternatives to deliver new services at remote sites with 4G networks in order to meet ANATEL obligations and national coverage objectives, aiming at:
– Searching for service availability in areas with no other terrestrial alternative – Offering competitive alternative in areas served by only one service provider
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Simulation laboratory setup
Satellite dedicated link delay simulation laboratory setup
SATELLITE
DELAY HUB
ENB UE
VSAT
EPC INTERNET
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Real scenarios tested
Compact EPC at VSAT side
Scenario 1
Compact EPC at HUB side
Scenario 2
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Scenario 1 – Compact EPC at VSAT side
Satellite Path
Satellite + LTE Path
VSAT User Terminal Downlink: DVB-S2 Uplink: DVB-RCS
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL
VSAT User Terminal Downlink: DVB-S2 Uplink: DVB-RCS
Scenario 2 – Compact EPC at HUB side
Satellite Path
Satellite + LTE Path
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Network Test Setup
Star One HUB - Guaratiba Site
LTE Terminal
(UE)
eNodeB
Compact
EPC
Star One VSAT - CPqD Site
VSAT
Guaratiba Station
Compact
EPC
Satellite
Platform
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Comparative Measurements
1
1 1 1
2
2
2 2
• Measurement results obtained in operational satellite network
• Configurations: 1 (Compact EPC at VSAT side) 2 (Compact EPC at HUB side)
• Performance improvement with compact EPC at VSAT side vs EPC at HUB side: 5% for throughput download 36% for throughput upload 8% for RTT measured at VSAT side 3% for RTT measured at HUB side
Throughput RTT
Download Upload Download Upload
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Results and New Challenges
• Good user experience for voice service for both uplink and downlink;
• Best MOS 4.4 measured with PESQ tool and EPC at VSAT side;
• Performance improvement with compact EPC at VSAT side vs EPC at HUB side;
• Optimized LTE integration with satellite backhaul resulting mean RTT less than 650 ms as expected;
• Sustainable download and upload data rates (average 50%, peak 80%) compatible with satellite shared
channel capacity (Maximum: 8 Mbps download and 1 Mbps upload);
• LTE plus satellite system architecture integration evaluation (compact centralized/decentralized EPC)
Results
New Challenges
• Improving the acceleration of traffic tunneled in GTP;
• Testing a third scenario with Split-EPC (control plane at VSAT side and user plane at HUB side);
• Looking forward to solutions with Ka Band satellites where it is possible to obtain even higher rates and
lower costs per Mbps;
• E2E QoS optimization for new applications such as M2M and Smart Grid
STAR ONE – A OPERADORA DE SATÉLITES DA EMBRATEL Thanks
Guilherme Marques Mattos Satellite Engineering Master Specialist
+55 21 (21) 2121-8561