03-10-2012, 03:09 PM
HIGH ALTUTUDE AERONAUTICALPLATFORMS
HIGH ALTUTUDE.docx (Size: 81.91 KB / Downloads: 26)
ABSTRACT:
Today global communications infrastructures of landlines, cellular towers, and satellites are inadequately equipped to support the increasing worldwide demand for faster, better, and less expensive service. At a time when conventional ground and satellite systems are facing increasing obstacles and spiraling costs, a low cost solution is being advocated. This seminar focuses on airborne platforms-airships, planes, helicopters or some hybrid solutions which could operate at stratospheric altitudes for significant periods of time, be low cost and be capable of carrying sizable multipurpose communications payloads. The airborne-internet aircraft will circle overhead at an altitude of 52,000 to 69,000 feet (15,849 to 21,031 meters0. At this altitude, the aircraft will be undisturbed by inclement weather and flying well above commercial air traffic. This type of network is called HALO Network.
Introduction
High altitude aeronautical platforms (HAAPS):
Here I mainly discuss about the general architecture and coverage area, High Altitude Aeronautical Platform Stations (HAAPS) is the name of a technology for providing wireless narrowband and broadband telecommunication services as well as broadcasting services with either airships or aircrafts. The HAAPS are operating at altitudes between 3 to 22 km. A HAAPS shall be able to cover a service area of up to 1'000 km diameter; the platforms may be airplanes or airships (essentially balloons) and may be manned or un-manned with autonomous operation coupled with remote control from the ground. Haaps mean a solar-powered and unmanned airplane or airship, capable of long endurance on-station possibly several years. A high altitude telecommunication system comprises an airborne platform typically at high atmospheric or stratospheric altitudes with a telecommunications payload, and associated ground station telecommunications equipment. The combination of altitude, payload capability, and power supply capability makes it ideal to serve new and metropolitan areas with advanced telecommunications services such as broadband access and regional broadcasting. A typical HAAP-based communications systems structure is shown in figure 1.
Hallo Network Concepts:
High-Altitude Long Operation (HALO) aircraft present a new layer in the hierarchy of wireless communications -- a 10-mile tall tower in the stratosphere above rain showers and below meteor showers. HALO airplane will be the central node of a wireless broadband communications network. The HALO Network, whose initial capacity will be on the scale of 10 Gbps, with a growth potential beyond 100 Gbps. In figure 2 we will see the stratospheric communications layer in Halo Network. The High Altitude Long Operation (HALO) Network is a broadband wireless metropolitan area network (MAN). The halo network combines the advantages of two well-established wireless communications: satellite networks and terrestrial wireless networks like cellular and personal communication systems. Satellite networks was developed at the low earth orbit (LEO), medium earth orbit (MEO), high elliptic orbit (HEO), geosynchronous earth orbit (GEO).
Ground Installation:
The figure 4 shows the ground installation of mobile switching centers, communication between the HAAP and the ground would typically be concentrated into a single ground installation or perhaps into two locations for redundancy. There would be considerable advantage to collocating RF units, base stations and mobile switching centers (MSCs).
Power System & Mission Requirements:
The figure 6 shows various power system components and mission requirements affect the sizing of a solar powered long endurance aircraft. The aircraft power system consists of photovoltaic cells and a regenerative fuel cell. Due to the high altitude at which these aircraft will be required to fly (20 km or higher) and the required endurance (from a few weeks to a year) the method of propulsion is the major design factor in the ability to construct the aircraft.
Conclusion:
The HALO network will provide wireless broadband communication services. The HALO network has several advantages over terrestrial wireless networks. The latter have complex geometries involving many base stations interlinked by cabling or microwaves. Moreover, each time cell splitting is used to increase system capacity, the network can demand significant reengineering. The HALO Network has striking advantages over proposed large LEO (LOWER EARTH ORBIT) constellations, including ease of repair and rapidly evolving performance.
HIGH ALTUTUDE.docx (Size: 81.91 KB / Downloads: 26)
ABSTRACT:
Today global communications infrastructures of landlines, cellular towers, and satellites are inadequately equipped to support the increasing worldwide demand for faster, better, and less expensive service. At a time when conventional ground and satellite systems are facing increasing obstacles and spiraling costs, a low cost solution is being advocated. This seminar focuses on airborne platforms-airships, planes, helicopters or some hybrid solutions which could operate at stratospheric altitudes for significant periods of time, be low cost and be capable of carrying sizable multipurpose communications payloads. The airborne-internet aircraft will circle overhead at an altitude of 52,000 to 69,000 feet (15,849 to 21,031 meters0. At this altitude, the aircraft will be undisturbed by inclement weather and flying well above commercial air traffic. This type of network is called HALO Network.
Introduction
High altitude aeronautical platforms (HAAPS):
Here I mainly discuss about the general architecture and coverage area, High Altitude Aeronautical Platform Stations (HAAPS) is the name of a technology for providing wireless narrowband and broadband telecommunication services as well as broadcasting services with either airships or aircrafts. The HAAPS are operating at altitudes between 3 to 22 km. A HAAPS shall be able to cover a service area of up to 1'000 km diameter; the platforms may be airplanes or airships (essentially balloons) and may be manned or un-manned with autonomous operation coupled with remote control from the ground. Haaps mean a solar-powered and unmanned airplane or airship, capable of long endurance on-station possibly several years. A high altitude telecommunication system comprises an airborne platform typically at high atmospheric or stratospheric altitudes with a telecommunications payload, and associated ground station telecommunications equipment. The combination of altitude, payload capability, and power supply capability makes it ideal to serve new and metropolitan areas with advanced telecommunications services such as broadband access and regional broadcasting. A typical HAAP-based communications systems structure is shown in figure 1.
Hallo Network Concepts:
High-Altitude Long Operation (HALO) aircraft present a new layer in the hierarchy of wireless communications -- a 10-mile tall tower in the stratosphere above rain showers and below meteor showers. HALO airplane will be the central node of a wireless broadband communications network. The HALO Network, whose initial capacity will be on the scale of 10 Gbps, with a growth potential beyond 100 Gbps. In figure 2 we will see the stratospheric communications layer in Halo Network. The High Altitude Long Operation (HALO) Network is a broadband wireless metropolitan area network (MAN). The halo network combines the advantages of two well-established wireless communications: satellite networks and terrestrial wireless networks like cellular and personal communication systems. Satellite networks was developed at the low earth orbit (LEO), medium earth orbit (MEO), high elliptic orbit (HEO), geosynchronous earth orbit (GEO).
Ground Installation:
The figure 4 shows the ground installation of mobile switching centers, communication between the HAAP and the ground would typically be concentrated into a single ground installation or perhaps into two locations for redundancy. There would be considerable advantage to collocating RF units, base stations and mobile switching centers (MSCs).
Power System & Mission Requirements:
The figure 6 shows various power system components and mission requirements affect the sizing of a solar powered long endurance aircraft. The aircraft power system consists of photovoltaic cells and a regenerative fuel cell. Due to the high altitude at which these aircraft will be required to fly (20 km or higher) and the required endurance (from a few weeks to a year) the method of propulsion is the major design factor in the ability to construct the aircraft.
Conclusion:
The HALO network will provide wireless broadband communication services. The HALO network has several advantages over terrestrial wireless networks. The latter have complex geometries involving many base stations interlinked by cabling or microwaves. Moreover, each time cell splitting is used to increase system capacity, the network can demand significant reengineering. The HALO Network has striking advantages over proposed large LEO (LOWER EARTH ORBIT) constellations, including ease of repair and rapidly evolving performance.