Real time video streaming over heterogeneous networks

摘要

Technological advances allow handheld devices to be equipped with faster processors and wireless interfaces, making the performance comparable to laptop Computers. In this paper, we describe real-time video streaming over heterogeneous networks namely Bluetooth, Wi-Fi and GPRS-EDGE. The wireless channel used for communication in different network varies in their Bandwidth, supported Bit rate and Unequal Error Protection coding techniques. In Bluetooth we can create a Bluetooth PAN (Piconet) in which mobile computers can dynamically connect to master and communicate with other slave. In Wi-Fi real-time video streaming over wireless LANs for both unicast and multicast transmission. The wireless channel is modeled as a packet-erasure channel at the IP level. The video delivery system in GPRS-EDGE is based on MPEG-4 video simple profile and on the IETF protocols RTSP, RTP, and RTCP for the media delivery and synchronization in compliance with the 3GPP specifications for Packet Streaming services (PSS).