Final Thesis

 
-Satellite-Digital Mobile Broadcast: 
 
S-MDB is a hybrid between satellite and terrestrial system. It uses a geostationary satellites and with a 
network of gap-fillers working with Base Transceiver Station (BTS) that provides urban indoor coverage . 
The synchronism in this system is very important to work with signals from the satellite with the gap-fillers. 
The forward error correction and interleaving is used to make the transmission. 
This system is used in Korea and consists in a multi-beam configuration with six spots and three satellites. 
With one spot is possible to cover several countries where the capacity can be shared by different operators 
and it is possible to support different multimedia services on the same carrier and is possible to reach 
2Mbit/s per beam. S-MDB complains the 3
rd
Generation Partnership Project (3GPP) standard for Mobile 
broadcast/Multicast Service. That makes possible to the Universal mobile Telecommunications terminals 
(UMTS) to support Mobile Satellite Service-band (MSS). 
S-DMB can be used as a complement for terrestrial networks over unicast terrestrial 3G UMTS mobile 
network that makes it a multicast network. 
-Mobile Broadcast/Multicast Service: 
 
The existing GSM and UMTS cellular networks can offer a type of service that is an IP data cast. This service 
is the MBMS that was standardized by several groups of 3GPP. This standard will facilitate the multicast 
transmission into mobile networks and the integration of broadcast. It brings a high quality for mobile TV 
using a low bandwidth that means lower cost. This is attractive for many operators and and eliminates the 
need to introduce new hardware into their networks. 
The MBMS allows to offer voice services, data and TV over the infrastructure that already exists. It is 
possible to transfer video and audio clips and also real streaming. All this services can be multiplexed with 
the MBMS standard on the same carrier. According to the estimations the 30% of the terminal will support 
MBMS at the end of 2010. 
The only disadvantage is the transmission of heavy streaming in a big area with a lot of users, where is 
better the alternative DVB-H. 

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TAMK University of Applied Sciences 
Escola Politécnica Superior de Castelldefels 
Marcos Tejedor Alonso 
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