Private:video broadcasting ideas

Research problems related to video streaming and broadcasting in WiMAX networks.

• Energy and video quality optimization for receivers. Note that not all receivers will be handheld mobile devices. Some WiMAX receivers could be static desktops, which do not have energy problem. Do we have separate streams for different types of receivers? Or should we look for a tradeoff between energy optimization (for mobile devices) and channel switching delay (for all receivers)?

• How do we allocate the wireless medium (downlink and uplink)? Keep in mind that other services from WiMAX subscribers can also be running. Can we design an efficient scheduler at the base station to provide QoS for video broadcasting as well as other services?

• How we can exploit/optimize WiMAX's mobile handoffs in a mobile environment for video broadcasting and other services.

• Performance Evaluation of Multicast/Broadcast Single Frequency Network Operation for WiMAX. Using resource efficient transport formats and assuming perfect synchronization among the BS can achieve almost twice the spectral efficiency of conventional cellular network. There is a similar evaluation for WCDMA networks but not much work has been done for WiMAX.

• Minimize energy consumption by reducing number of sleep-wakeup transitions.

• Video in WiMAX can be delivered over unicast, multicast or broadcast channels. While broadcast is more resource efficient, unicast offers more flexibility in terms of user specific content. According to the users video request the BSS can decide to add the user to a unicast, multicast or broadcast group. How does this decision making improve the quality of video transmission? Does this help in increasing the network capacity? Since different mode of transmission require different amount of power, are there any implications in terms of Base Station power efficiency?

 Challenge1: Finding typical video viewing pattern statistics as test data.

• Multimedia Overlay Construction over WiMAX: