Satellite Digital Multimedia Broadcast ( SDMB ) Access Layer Definition

The Satellite Digital Multimedia Broadcast (SDMB) system implements a satellite based broadcast layer to complement the 3G terrestrial mobile cellular networks with broadcast and multicast capabilities for the spectrum-efficient delivery of multimedia services on mobile devices. This paper provides the definition of the SDMB access scheme, addressing its requirements and constraints, the functionality of the individual protocol layers/sub-layers as well as the procedures executed in the SDMB radio access network.