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Mobile communication
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RADWIN Fibre in Motion for
Effective Train-To-Track
1
Effective Train-To-Track
Communication Solutions
Harish Dewani
Why Wireless Train-to-Track Communications?
• Real Time On-Board CCTV
• Passenger Information Systems (PIS) & Advertising
• Broadband Internet for passengers
• Signaling and CBTC
2
• High capacity
• Guaranteed uplink for CCTV
• Long range coverage
• Simple & fast installation
Train-to-Ground Communications – Requirements
33
• Simple & fast installation
• Easy maintenance
• Non-Line-of-Sight performance
• Tunnels
• QoS for high priority services
• Fast Handover
• Reliability and robustness
Train to Ground Communications – Requirements
44
• Reliability and robustness
• Railway / Metro certifications
(EMC, vibrations)
Common Technologies are Not Optimal
• Best effort service - no secured
bandwidth (SLA)
• Limited bandwidth - not enough for
CCTV
• Limited coverage - 150 meters
• Interference from passengers Wi-Fi
Wi-Fi / MeshWi-Fi / Mesh
CellularCellular
5
• Low capacity – not enough
for CCTV / PIS / Internet
• Expensive
Leaky CableLeaky Cable
• Network control
• Availability in emergency
• No guaranteed service level for priority service
(CCTV, PA)
• Limited uplink ( not enough for CCTV)
Cellular
3G / 4G
Cellular
3G / 4G
RADWIN vs. 802.11n Wi-Fi solution in NLOS Scenario
• 4 streams of video over Wi-Fi
• Capacity is unstable
• 4 streams of video over
6
Throughput versus Time
Stable bandwidth is critical for video quality!
• 4 streams of video over
RADWIN solution
• Capacity is fixed
About RADWIN
• Leading provider of Sub-6 GHz broadband wireless solutions
for telecom operators, transportation, public safety, critical facilities, oil &
gas (PtP, PtMP and Mobility Solutions)
• Offers carrier-class high capacity, wireless solutions for fixed and mobile
connectivity
7
• Proven installed base in over
150 countries
• Global presence with offices in
major locations and a network of partners
RADWIN Presence Worldwide
UK
US
Mexico
Israel
Russia
India
Philippines
El Salvador
Spain
Thailand
Poland
China
Senegal
8
Peru
Brazil
Singapore
South Africa
Columbia
Indonesia
Deployed in Over150 Countries
18 Offices World Wide
Presence in India
� Since 2005
� Indian HQ at New Delhi, Mohan Cooperative
• Sales / Marketing Office
• Technical Support Centre - APAC
• Pre and Post Sales support
• Component level Repairing centre – RMA Centre
9
Huge Installed Base….
• Over 120,000 Radios deployed in India.
• Majority of Installation are in Telcos, ISPs, Railways, Defense,
Mines, and State Government
10
Few Partners & Customers….
11
Market Segments
• Telcos, Cellular Backhaul and enterprise Connectivity
• BSNL, Bharti, Tata, MTS, Aircel, Idea, Vodafone
• Surveillance, Video Connectivity
• Sesa Goa (Mines), Indian Army (Borders), IIT Madras (Chennai), ONGC (URAN
Area Mumbai), SER (Platform CCTV)
12
Area Mumbai), SER (Platform CCTV)
• Oil & Gas, Voice, Data and Video Connectivity
• ONGC , Oil India, Indian Oil, HPCL – Data Connectivity ..
• Transportation, InterStations, Plarform CCTV and Inter-Office Connectivity
Market Segments (Continued)
• Defense, Border Surveillance, Exchange and Data Connectivity
• Indian Army (Multiple Commands), Assam Rifle
• Utility, Mines and InterOffice Connectivity, Power Station connectivity for Critical Data
• SESA Goa , Neiveli Lignite Mines, Delhi Transco
• State Govts,
13
• State Govts, Data Connectivity
• Ajmer District School connectivity
• MP Check Post Connectivity
• UPPCL
• APDRP Project
RADWIN Solution Underground
Mobile Radio units installed
onboard the train - front and back
14
Radio Base Stations deployed
along the tunnel every ~1Km
RADWIN Solution Above Ground
� Radio Base Stations (HBS) deployed along the
route, supporting multiple trains
simultaneously
� Two antennas directed eastbound and
westbound for extended coverage
� Optional redundancy
15
� Radio Mobile unit (HMU) installed on-
board the train, connected to 2 x train
antennas installed on top
� Optional dual radio + antennas to
improve redundancy and coverage
• Installed and proven to deliver 90Mbps
per base station
• Extended coverage: up to 1 Km
RADWIN FiberinMotion™ Technology (1)
1616
underground, or 5 Km above ground
• Uplink / Downlink configurable traffic
• Guaranteed bandwidth per train
• Seamless handover < 50msec
• Complete redundancy
• Multiband - Multiple frequencies in
RADWIN FiberinMotion™ Technology (2)
1717
same platform
• EN50155 and EN50121 certified
Case Studies
18
Evaluation vs. existing Wi-Fi solution
Services required
• Real-time CCTV
• 8 cameras – 10 Mbps uplink
Metro Operator in South America
• PA & VoIP
• 1 Mbps uplink / downlink
• PIS
• Downlink
Results
• 88 Mbps per base station
• Minimum 30 Mbps per train (15 full
duplex)
• Minimal number of base stations
• Fast handover <50msec
• Redundancy
Metro Moscow (Russia): Broadband Wi-Fi for Passengers
• New project won by RADWIN
• Metro Moscow
• No. 4 in the world (6.7 M passengers
per day)
• 188 stations, 300 Km system
• Provide broadband Wi-Fi to passengers
• Use same solution for future PIS
• First Line already deployed
• 90 Mbps per Base station
• Base station every ~900 meters