QoS provisioning in mobile video services with satellite sources

In this paper, we propose a real-time transcoding system to generate contents for mobile networks with QoS provisioning. Video transcoding is widely used to change storage formats. However, as far as the authors know, it has not been proposed to generate real-time contents. Although the philosophy in this paper can be extended to alternative video sources (all major open TV channels are broadcasted via terrestrial radio, cable and satellite), we have chosen satellite TV because of its ubiquitous access. We present an indoor video service that delivers transcoded contents to wireless Pocket PCs via IEEE 802.11b multicast. We have focused on IEEE 802.11b because it has been the first legal sub-standard in the European Union. Due to EU regulations, IEEE 802.11a was not immediately adopted and this situation influenced the development of the new sub-standard IEEE 802.11h, a variation of IEEE 802.11a [3]. However, the extension of this work to new sub-standards like IEEE 802.11g is straightforward.