2024. 5. 22. 06:33ㆍ카테고리 없음
Image 1: Oneweb Satellite Launch Image 2: SpaceX Starlink Project Image 3: Telesat Satellite Network Image 4: Satellite IoT Technology
The space industry is expanding from the public to the private sector.
Companies like Oneweb, SpaceX, Telesat, and Amazon are advancing global internet networks using low Earth orbit (LEO) satellite constellations.
LEO satellites have shorter transmission delays compared to geostationary satellites at 36,000 km altitude.
This allows global communication services through multiple LEO satellites.
Satellite communication technology is expected to play a significant role in IoT and voice services.
Oneweb: Pioneer of LEO Satellite Networks
UK-based Oneweb was the first to start LEO satellite network operations.
Although currently paused, they initially planned to launch 648 satellites by 2021.
Each satellite was designed to support data speeds of 2.17Gbps.
By March 2020, they had successfully launched 34 satellites, bringing their total to 74 LEO satellites.
SpaceX: Building a Global Network with Starlink
US-based SpaceX is developing a network of 12,000 LEO satellites under the Starlink project.
By 2021, they had launched over 1,000 satellites.
SpaceX has reduced launch costs by reusing over 80% of their Falcon 9 rockets.
They also lowered the cost of ground terminal antennas from $1,500 to $200-$300.
Telesat: Providing Extensive Services
Canada's Telesat aims to launch 298 satellites by 2023.
They utilize both polar and inclined orbits.
Telesat plans to use satellites with 10Gbps inter-satellite optical links,
reducing the number of ground gateways to fewer than 50.
Advancement of Satellite IoT Technology
Satellite IoT technology can collect data globally without roaming,
enabling new infrastructure and services.
Currently, 84% of the global satellite IoT market is served by small and medium-sized IoT providers using LEO satellites.
Lacuna Space, a small company, aims to launch 24 satellites by 2021 for global IoT services.
Need for Standard Technology in Satellite Communication
To provide communication services, standard technology is needed for compatibility
between terrestrial and satellite communications across various orbits and frequencies.
Innovation is required in three key areas: satellite payload technology, ground station equipment, and communication standards.
First, advancements in satellite payload technology are needed for data processing and operational flexibility.
Second, miniaturization of ground station components is necessary, along with cost reduction.
Innovations in materials, semiconductor processing, and manufacturing are required.
Third, standard communication technology is needed to enable terrestrial terminals to work with satellite communications.
Currently, standard technology applies existing 5G technology to satellite communications.
Conclusion
The expansion of the space industry to the private sector and the use of LEO satellites
are driving innovation in global communication services.
The combination of satellite communication and IoT technology opens up new infrastructure and service opportunities.
Continued advancements and standardization in satellite communication technology are expected.