On the Use of Cellular Technology for Digital TV Bi-Directional Return Channel Services

In this work the behavior of particular cellular technology for use in a wireless implementation of a bi-directional digital TV return channel is considered. The analysis is done using a simulation tool, based on the Tangram-II platform, that incorporates a detailed propagation model and the relevant features of the cdma2000 EV-DO system. Internet access through Web browsers was judged to be the key application to be provided. This paper presents both throughput and latency results with varying number of terminals in the system. It also identifies variations in the user quality of service due to their geographic position. The results show that even if some parameters of the scheduling algorithm are varied, it is difficult to improve the fairness performance of the technology. A very simple solution is proposed to enhance these fairness characteristics