Halo Network


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Halo Network

  1. 2. Contents <ul><li>What is HALO ? </li></ul><ul><li>The System Architecture </li></ul><ul><li>HALO Network concepts </li></ul><ul><li>Advantages over satellite and terrestrial networks </li></ul><ul><li>Power system and system requirements </li></ul><ul><li>Desirable Features </li></ul><ul><li>Application </li></ul>
  2. 3. What is HALO ? <ul><li>The High Altitude Long Operation Network TM is a broadband wireless metropolitan area network, with a star topology. </li></ul><ul><li>High Altitude Aeronautical Platform Station (HAAPS) is the technology used here. </li></ul><ul><li> The HALO network will be located in the atmosphere, at an altitude miles above terrestrial wireless, but hundreds to thousands of miles below satellite networks. </li></ul><ul><li>HAAPS means a solar powered unmanned airship capable of long endurance-may be of several years. </li></ul>
  3. 4. System architecture <ul><li>HALO Aircrafts contains network elements including an ATM switch, spot beam antennas, and multibeam antennas, as well as transmitting and receiving electronics. </li></ul><ul><li>The antenna array provides cellular-like coverage of a large metropolitan area. </li></ul><ul><li>The HALO network can be connected to non-HALO networks, such as ATM networks, Internet, and frame relay via an HG/interworking unit (IWU). </li></ul>
  4. 6. Types of HAAPS <ul><li>Lighter than air HAAPS are kept stationary. They are probably air balloons floating in air. </li></ul><ul><li>Other type is Airplane based HAAPS which are flown in a tight circle. </li></ul><ul><li>For broadcast application a simple antenna beams signals to terminals on the ground. </li></ul>
  5. 8. HALO Network concepts <ul><li>HALO Aircraft present a new layer in the hierarchy of wireless communication - a 10 mile tall tower in stratosphere. </li></ul><ul><li>It is in a level above rain shower and below meteor shower. </li></ul><ul><li>HALO Network plane is the central node of the broad band communication. </li></ul><ul><li>The capacity is in the range of 10-100 Gb/s. </li></ul>
  6. 10. Elements of HALO Network <ul><li>A MMW antenna array and its related components will be located in a pod suspended below air craft fuselage. </li></ul><ul><li>Antenna array will produce many beams typically more than 100. </li></ul><ul><li>Each beams will be separated by a fixed frequency. </li></ul>
  7. 11. Advantages <ul><li>Over satellite network </li></ul><ul><li>Satellite network have expensive high power user terminal and long propagation delay. </li></ul><ul><li>system capacity is practically fixed. </li></ul><ul><li>Establishing a new satellite is very expensive. </li></ul>
  8. 12. Advantages <ul><li>Over Terrestrial network </li></ul><ul><li>Terrestrial networks have low look angles and complex infrastructure. </li></ul><ul><li>They require many base stations that must be interlinked with cables. </li></ul>
  9. 13. Power system and system requirements <ul><li>Aircrafts power system consist of photovoltaic cell and a regenerative fuel cell. </li></ul><ul><li> Advantage of using this is that it eliminates the need of and compress air at high altitude. </li></ul><ul><li>Aircraft size increases with increasing altitude. </li></ul>
  10. 14. Aero plane properties <ul><li>The HALO aircrafts will be operated in shifts from regional airport. </li></ul><ul><li>HALO aero plane is specially designed for carry the hub devices and they are having long lifetime. </li></ul><ul><li>Look angle will be greater than 20 degree. </li></ul><ul><li>So the network will available in a super metropolitan area(including urban, suburban and surrounding rural area). </li></ul>
  11. 15. Other properties <ul><li>HALO network can interface with the local LAN connections. </li></ul><ul><li>It can Interface between broadband protocols like ATM and SONET. </li></ul><ul><li>The HALO network will provide access to the PSTN and become the backbone for internet services like world wide web. </li></ul>
  12. 16. Subscribers Network relation
  13. 17. Desirable Features <ul><li>Seamless multimedia services. </li></ul><ul><li>Adaptation to end user environment. </li></ul><ul><li>Rapidly deployable to sites of opportunity. </li></ul><ul><li>Bandwidth on demand for efficient use of available spectrum . </li></ul>
  14. 18. Applications <ul><li>Widely separated customers can receive same communication as i n entertainment broadcasting. </li></ul><ul><li>We can access interactive TV and internet. </li></ul><ul><li>Costumers can have large coverage area in telecommunication compared to terrestrial network. </li></ul><ul><li>Can use as a communication techniques for remote areas. </li></ul><ul><li>Can use in marine communication system. </li></ul>
  15. 19. HALO Network coverage
  16. 20. References <ul><li>J. Martin and N. Colella, &quot;Broadband Wireless Services from High Altitude Long Operation (HALO) Aircraft,&quot; Proc. of the SPIE International Symposium on Voice, Video, and Data Communications: Broadband Engineering for Multimedia Markets , 2000 . </li></ul><ul><li>G. Djuknic, J. Freidenfelds, et al., &quot;Establishing Wireless Communications Services via High-Altitude Aeronautical Platforms: A Concept Whose Time Has Come?&quot; IEEE Communications Magazine , September 2000. </li></ul><ul><li>www.angeltechnologies.com /techpapers </li></ul>