Skarpt läge för Alphabets internetballonger
Googles moderbolag Alphabet har gjort pilottester med internet via ballonger under projektnamnet ”Project Loon” under en längre tid, men nu har det blivit dags att testa vad tekniken går för i skarpt läge. Det är mobiloperatörer i Indonesien som blir först ut med att testa tekniken. Andra delar av världen kommer att följa efterhand. Alphabets stora dilemma med ballongerna har varit att ta fram en design som både är billig att tillverka, men samtidigt robust nog att klara att sväva runt i stratosfären.
Project Loon på Wikipedia
Wikipedia (en)
Project Loon is a research and development project being developed by Google X with the mission of providing Internet access to rural and remote areas. The project uses high-altitude balloons placed in the stratosphere at an altitude of about 18 km (11 mi) to create an aerial wireless network with up to 4G-LTE speeds. It was named Project Loon, since Google itself found the very idea of providing internet access to the remaining 5 billion population unprecedented and "crazy."
The balloons are maneuvered by adjusting their altitude in the stratosphere to float to a wind layer after identifying the wind layer with the desired speed and direction using wind data from the National Oceanic and Atmospheric Administration (NOAA). Users of the service connect to the balloon network using a special Internet antenna attached to their building. The signal travels through the balloon network from balloon to balloon, then to a ground-based station connected to an Internet service provider (ISP), then onto the global Internet. The system aims to bring Internet access to remote and rural areas poorly served by existing provisions, and to improve communication during natural disasters to affected regions. Key people involved in the project include Rich DeVaul, chief technical architect, who is also an expert on wearable technology; Mike Cassidy, a project leader; and Cyrus Behroozi, a networking and telecommunication lead.
Loons shall use patch antennas which are directional antennas to transmit signals to ground stations or LTE users. Some smartphones with google SIM cards can use Google internet services. The whole infrastructure is based on LTE in which eNodeB is carried in the balloon which will travel across the globe and connect to users and EPC network.
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