The Study of Frequency Planning Schemes for Supporting Mobile IPTV Services over Wireless Cellular Networks

High speed transmission technologies are continuously progressing in wireless cellular networks. Undoubtedly, 4G networks will be realized very soon. It will lead to a fast growth of mobile IPTV services over mobile networks. However, mobile IPTV services usually require a larger transmission bandwidth for guaranteeing the QoS or QoE. Thus, how to support mobile IPTV services over wireless cellular networks with limited bandwidth is worth studying. This proposal will be conducted in two years. In the first year, we intend to analyze the performance of mobile IPTV services under different transport schemes, such as unicast, broadcast and multicast. In the second year, we aims to develop frequency planning schemes for simultaneously supporting mobile IPTV, voice and data services over 3G/4G or WiMAX cellular networks. In our proposed frequency planning schemes, the conventional voice and data services are assigned a higher allocation priority over mobile IPTV services. Since cell-edge users are more distant from the base station, the transmitting power must be larger for cell-edge users. However, a larger transmitting power can result in inter-cell interference on cell edges. To avoid inter-cell interference, a higher frequency reuse pattern N, e.g., N = 3, can be employed to allocate the frequency bands for cell-edge users. While the frequency reuse pattern N = 1(i.e., single frequency network) is used for allocating the cell-center band. Such hybrid frequency reuse method is named soft frequency reuse. In addition, the Time-Slicing technology defined in DVB-H standard can also be utilized to enhance the power saving. Finally, we will also present a dynamic frequency planning scheme for improving the overall system capacity under the condition of load imbalancing among cells.

Project ID:PB10301-0509
External Project ID:NSC102-2221-E182-002-MY2