Broadband Communication (Mobile Broadband and Satellite) Slide 1

Transcription

1 Broadband Communication (Mobile Broadband and Satellite) Slide 1

2 Broadband Wireless and Mobile Applications Telemedicine Teleworking E-Government Distance Learning Homeland Security E-Commerce Applications for People with Disabilities Utility Application Information Gathering Tourism In Flight Office , Fax, Phone, File transfer, Video Conferencing In Flight Entertainment Gamble, Phone, Live TV Multimedia and Web Browsing for Train Passengers Audio/Video Streaming What is the technology that best serves these applications? Slide 2

3 Applications Convergence Opportunities Enterprise: Corporate VPN, with attachments, rich web browsing, graphical stock quotes. Entertainment: Pictures/Imaging, video/audio streaming, VoIP, broadcast video/audio, multimedia messaging, games. Publishing: News, advertising. Content Cable TV Telephone Computer Digital Media Video Transport Voice Transport Storage/ Handling Devices Computing Content Communications Merging of content providers and content transporters. Phone companies, cable companies, entertainment industry, and computer industry. Worldwide de-regulation. Spectrum management. Slide 3

4 Application Convergence Slide 4

5 Flexible, adaptive Radio Access Higher frequency bands, >3G access Rich Audio Visual Content Creation, Processing and Delivery Seamless and Context aware Service adaptation and Delivery Mobility, beyond 3G Domain Local Sphere Networking BAN,PAN WLAN AdHoc Satellite Mobile >3G, Mcast S-DMB Reconfigurable Radio Networks and Systems Wide Area Networking FWA, DxB. IP Transport Control & Routing Satellite Broadband Access Optical Core Network Broadband Access Domain Optical Network Broadband Access IP - Optical Convergence & Control Other Broadband Access (Power Nets,..)... Network & Service Management Domain Slide 5

6 Ubiquitous Communications Network FTTH Extremely High Speed xdsl ADSL: Up to 8Mbps, 4-5Km range VDSL: Up to 54Mbps, range Existing Copper Fiber DSLAM ONU Sensor Fusion Digital Processing Voice Detection.. Ubiquitous Platform IP Backbone Finance Commerce Satellite DAB/DVB Mbps/3.40 GHz band Fixed user/metropolitan area Gateway Mobile Over 2-10Mbps/ 2-20 GHz Band Vehicular Environments/Medium Area IEEE Bluetooth Ethernet Access Gateway WLAN UAP S UAP M A R Sensor Network WiMax roaming HPI CDMA 2000 WCDMA UAP Ubiquitous Access Point Beyond 3G The future all-ip networking environments will have IP-based domains as the common infrastructure interconnecting various and very different access technologies Slide 6

7 Ubiquitous Networks Features Global Coverage: Networks are expected to be heterogeneous and all IP based with multi-technology terminal supporting wide range applications. Broadband Connectivity: Provide telecommunication, data multimedia services with peak rates of more than 100 Mbps with average of 20 Mbps. Quality of Service: Support multimedia services with QoS. Network Capability: Provide at least 10 times that of 3G systems, enabling high definition video streams to phones. Personalized Service: Service providers address the customized services. Cost: 4G systems must be able to provide fast speed and large volume of data transmission services at lower cost than today, including spectrum licensing, terminal and service costs. The converged network technologies cover homes, cars, corporate environments, and public areas, even including satellite links with global coverage. Communications anywhere, anytime, and any technology challenges. Technical Challenges to be addressed. Slide 7

8 Mobile Broadband Access Slide 8

9 Toward Wireless Broadband System Slide 9

10 Network and Wireless Access System Slide 10

11 Mobile Broadband Wireless Access Slide 11

12 MBWA Overview Slide 12

13 Technology Deployment Options Slide 13

14 Wireless Broadband Access-WiMAX Slide 14

15 WiMAX Standard Source: WiMAX Forum Slide 15

16 WiMAX System Structure Slide 16

17 MBWA vs. Mobile WiMAX Source: Qualcom Slide 17

18 Slide 18

19 Satellite System Examples Slide 19

20 Why Satellite Communications? Ubiquitous Coverage: A single satellite system can reach every potential user across an entire continent, particularly in areas with low subscriber density Bandwidth Flexibility: Simplex, Duplex, Narrowband, Wideband, Symmetric and Asymmetric Deployment: Short installation times, once the network is in place, more users can be added quickly Connectivity: Multipoint-to-Multipoint, Broadcasting and Multicasting Disaster Recovery: Disaster recovery alternative to fiber networks, emergency communications Cost: Cost is independent of the distance Markets: TV, Broadcast and Multicast Services, Sea, Air, and Sparsely Populated Areas Few hundred Satellite Applications at Ka-Band filled with ITU Both GSO, NGSO, and hybrid Slide 20

21 Capability Satellite-Fiber Comparison Fiber Optic Cable Systems 10 Gbps-3.2 Terabits/second* Comparing Satellite and Fiber Characteristics Geo Satellite in a Global System Meo Satellite in a Global System Leo Satellite in a Constellation Transmission Speed Single Sat 1 Gbps-10 Gbps Single Sat 0.5 Gbps- 5 Gbps Single Sat.01 Gbps-2Gbps Quality of Service Transmission 25 to 50 ms 250 ms ms ms latency System 93 to 99.5% 99.98% (C-Ku band) 99.9% (C-Ku band) 99.5% (L-C-Ku band) Availability w/o 99% (Ka band) 99% (Ka band) 99% (Ka band)) Backup Broadcasting Low to Nil High Low Low Capabilities Multi-casting Low High High Medium Capabilities Trunking Very High High Medium Low Capabilities Mobile Services Nil Medium-to-High High High Slide 21

22 Access Satellite Systems - Example System Ka/Ku Data Rate Protocols Adv. Features Comments idirect C/Ku/Ka Down: Mbps Link Star Viasat Surf Beam Viasat for SES Americom Starband Gilat C/Ku Slide 22 Up: Mbps Shared Down: 60Mbps Up:3Mbps TCP/UDP/IG /MP etc Forward: DVB-S Return: DVB-RCS WiFi, WiMAX, Connectivity, VOIP, MPLS WiFi, Connectivity in SiriComm Internet access, Enterprise, and Distance Learning Ka DOCSIS Consumer SOHO Ku/Ka Up: kbps Down:500Kbps- 1Mbps IP Star Ku Up:up to 2Mbps SKYPLEX EutelSat Ka Band Version of Linkstar Down:8Mbps Up:2Mbps or 6Mbps Down:36Mbps Proprietary access Protocol Proprietary SCPS or Burst TDMA, BOD Small Enterprise Internet Access, Broadcast and Multicast Internet Telephony Broadband Access High Speed Multimedia 10/100 BaseT Ethernet Unique security approach, Not open standard regarding forward and return links Interoperability issue Spain & Latin America Viasat adopted Cable modem protocol to satellite to get the terminal cheap? Operational Operational in Pakistan Eutelsat and Comsat Division of ViaSat

23 Air To Ground Communication future scenario TV,Radio Broadcast Navigation Communication Satellite Satellite ATM/ATC over Satellite ATM between Aircraft WCDMA HSxPA EV-DO Airport Link Groundbased ATM/ATC WiMax Ground Network Vertical WiMax Slide 23

24 FREQUENCY Narrow band systems L-band GHz downlink, uplink S-band GHz downlink GHz uplink C-band GHz downlink, GHz uplink X-band GHz downlink, GHz uplink A few 10s to 100s khz of bandwidth only Wideband/broadband systems Ku-band - about GHz downlink, GHz uplink Exact frequencies depend on applications (fixed, DBS etc.) 36 MHz of channel bandwidth; enough for typical Mbps applications Ka-band - about GHz downlink, GHz uplink 500 MHz of channel bandwidth; enough for gigabit applications GHz of bandwidth Q-band - in the 40 GHz V-band - 60 GHz downlink - 50 GHz uplink Slide 24

25 Some Fundamentals: Orbits Slide 25

26 Satellite Broadband Broadband Connectivity to Homes/Offices Forward link: 2-3 Mbps Return link: Kbps Connectivity regardless of location/geography Mobile Broadband Services Comms on the Pause In-motion: Transmit and Receive on-the-go Multi-Mb inbound to vehicle, up to 500kbs+ out Valuable for Network Centric Operations Air, Sea and Land-based vehicle applications Broadband Connectivity to Aircraft Forward link: 10 Mbps Return link: Kbps Near-global connectivity /Internet access FSS, Satellite capacity Slide 26

27 Next Generation Systems: Mostly Ka-band Ka band usage driven by: higher bit rates - 2Mbps to 155 Mbps lack of existing slots in the Ku band Features spot beams and smaller terminals switching capabilities on certain systems bandwidth on demand access and peer-to-peer communications possible Drawbacks higher fading manufacturing and availability of Ka band devices little heritage from existing systems (except ACTS and Italsat) Slide 27

28 Aeronautical Ku band (1/2) Passenger Communication Services Airline Operational Services (non safety services) Company Intranet and Internet Access Scheduling - Real-time/two-way (e.g. VPN, Yahoo); Weather Updates Airline Specific Internet Information Cabin Crew Applications - Duty free shopping, booking, travel destination; On-board Telemedicine Internet based Audio, Video, Entertainment Aircraft Health Monitoring - CNN, BBC World, Internet games, etc.. Flight Data Services Slide 28

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30 Aeronautical Ku band (2/2) Architecture Overview GSO Leased Capacity Space Segment Forward & Return RF Link user AES High Gain Antennas CbB LES / Network Leased Capacity NOC Owned by CbB Internet Corporate Intranets Airline Operations Centres Slide 30 Airborne Segment Ground Earth Station Segment Network Operations Center (NOC) Segment Land Earth Station (LES) Terrestrial Network NOC Aicraft Earth Station P D A La ptop IFE

31 Satellite Multimedia Broadcasting and Multicasting Services (MBMS) High power Geo- stationary sa tellite 7 spots over Europe Low cost impa ct 3G handset «Sa tellite enabled» + Local storage Slide 31 Satellite distribution link in IMT2000 mobile satellite band Interactive link in IMT2000 mobile terrestrial band 3G Base sta tion 2G/ 3G Mobile N etwork Hub based on 3G equipment Broadcast/ Multicast service centre Sa tellite ena bled Content N etworking Content providers

32 IP Satellite Network ETSI standard for transmission of digital television over cable and satellite. Modified to support packet transmission Standards exist for transmission of data and network management Uses a fixed length packet or cell of 188 bytes Network Router Network PEP User terminal Gateway PEP Router Server Router PEP User terminal Forward link DVB-S Return link DVB-RCS Slide 32 PEP Performance Enhancing Proxy

33 DVB S2 DVB-S2 SYSTEM Satellite Gateway Buffers per: Protection level ACM User Command Service level BUF BUF BUF ACM Router ACM routing manager Info Response High bit-rate forward link Info Response Info Response C/N+I signaling Info Provider Internet Router Interaction Channel GW Return channel User Terminal Info Request Slide 33

34 Broadband VSAT Provides two-way TCP/IP Transmissions for high speed, multimedia Star, mesh, hybrid technologies C, Ku, Ka, extended C Future Services WiFi WiMax VoIP Slide 34

35 End-to-End QoS Model Mechanisms/ Technologies Layers Application layer QoS Parameters Security, Throughput TCP Enhancements and optimization Transport layer (TCP/UDP) Throughput, delay Signaling, DiffServ, routing & forwarding, MPLS Network layer (IP) Guaranteed rate, packet delay, packet loss, throughput, delay, delay variation, security Allocation schemes MAC layer Throughput, Delay Modulation & encoding Physical layer BER, timing, symbol rate Study the impact on QoS Parameters at each layer of satellite network to meet the user level satisfaction guarantee. Slide 35

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