Types of satellite Mobile networks.

Types of satellite networks.

Types of satellite networks.

The term space systems most often applies to satellite networks. These can provide various services, such as communications, broadcasting, navigation, and earth exploration.

The ITU categorises some of the major categories of satellite services as follows:

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Fixed-Satellite Service (FSS)

Broadcasting-Satellite Service (BSS)

Mobile Satellite-Service (MSS)

Earth Exploration-Satellite Service (EESS)

Radiodetermination-Satellite Service (RDSS)

These are broad categories that can encompass satellite communication services for land, maritime, and aeronautical craft or vehicles, amateur satellite activities, emergency beacon satellite monitoring, Global Positioning Systems (GPS), direct-to-home (DTH) sound and television, and data acquisition for weather systems and survey purposes. One satellite can be made up of a number of satellite networks providing a combination of services, such as FSS, BSS, or MSS, in a number of different frequency ranges.

Providing any of these services involves use of the radiofrequency spectrum. The frequency bandwidths employed can vary from 75 kHz for use in telecommand and telemetry to around 65 MHz for use in high capacity communication circuits.

Mobile satellite TV is a service that is getting more and more popular these days, both among individuals and businesses. In fact, people’s appetite for TV and Internet “anytime, anywhere” is so widespread that it is driving technologies to provide people all the luxuries of a normal home on the road, on the sea or in the air. And the reality is that it is possible today to access satellite TV, satellite radio channels, and even Internet and email in cars, boats and planes.

Localization of mobile stations

Mechanisms similar to GSM

Gateways maintain registers with user data

HLR (Home Location Register): static user data

VLR (Visitor Location Register): (last known) location of the mobile 

station

SUMR (Satellite User Mapping Register): 

satellite assigned to a mobile station

positions of all satellites

Registration of mobile stations

Localization of the mobile station via the satellite’s position

requesting user data from HLR

updating VLR and SUMR

Calling a mobile station

localization using HLR/VLR similar to GSM

connection setup using the appropriate satellite.

Types of satellite networks.

Types of satellite Mobile networks.