SK telecom Satellite DMB Service

We present satellite DMB service that allows customers view multimedia broadcasting programs via their cellular phones anytime and anywhere

What is satellite digital mobile broadcasting (DMB)?

Satellite DMB is a new concept in multimedia mobile broadcasting service that converges telecommunications and broadcasting.

Reception of Service

Customers can receive the signal transmitted by the satellite directly from most areas on the ground. However, there are some shadow areas such as subways, tunnels, inside buildings, etc. SK Telecom plans to extend the signal receiving areas by installing Gap Fillers (Base Stations) in those shadow areas.

Frequency Bandwidth

Ku-Band (13.824~13.883GHz) is used between the Signal Transmission Center and satellite (the 144th degree of east longitude), and S-Band (2.630~2.655 GHz, 25MHz) is utilized between satellite (Or Gap Filler) and the terminals. Further, Ku-Band (12.214~12.239GHz) is used between satellite and Gap Filler (Base Station).

There are a total of 39 channels.

- These are: 11 video channels, 25 audio channels, and 3 data channels

Customers can use the service anytime and anywhere.
- The 11 video channels consist of ground frequency retransmission channels, program provider (PP) and various specialized program channels such as news, movies, sports, etc.
- The 25 audio channels comprise such channels as music, news, education, etc.
- The 3 data channels provide a variety of information services.

The most suitable frequency bandwidth is used for receiving the signal while on the move.
-The satellite DMB can offer a frequency output 16 times larger than that of the Mugunghwa Satellite, because the output of its frequency is not restricted by the ITU's regulation. Therefore, it lets customers receive the signal while on the move, via their mobile handsets.
-The satellite DMB frequency is the most suitable for the mobile environment among those frequencies available for satellite use. Its frequency quality is not affected by rainfall.

It is the most appropriate transmission technology in a mobile environment. The satellite DMB service adopts the same Code Division Multiplexing (CDM) technology as the mobile phone service. Thus it is the most appropriate for signal reception in a mobile environment. This can also guard against multiple channel interferences that cause reductions in signal receiving quality within the mobile environment.

Gap Fillers (Base Stations) in various forms are used. Customers are allowed to enjoy smooth service in shadow areas due to the Gap Fillers (Base Stations) in a variety of forms. The shadow areas inevitably exist due to the characteristics of satellite signals.

A broad range of terminals that fit customers' varied demands are provided.
-Consumers' portable convenience can be greatly increased by building a core chip for the use of satellite DMB terminals, and the development of a variety of antennas such as patch type, helical type, etc.
-This service enables high quality streaming video through a MPEG-4 H.264 system that lets customers enjoy music of CD quality when furnished through a MPEG-2 AAC+ system.