01394nas a2200121   4500008004100000245008800041210006900129260002000198520087700218100002101095700002201116856013401138       2008                        eng d00aChallenges in Cross Layer Design for Multimedia Transmission over Wireless Networks0 aChallenges in Cross Layer Design for Multimedia Transmission ove  c13 - 15 October3 aThis paper examines the challenges of cross layer design for multimedia transmission over wireless networks. In wireless networks multimedia data transmission inherits also all the characteristics and constrains related to the propagation to the free space. One first striking difference between wired and wireless networks is the cause of packet losses. Packet losses in wired networks occur mainly due to congestion in the path between the sender and the receiver, while in wireless networks packet losses occur mainly due to corrupted packets as a result of the low Signal to Noise Ratio (SNR), the multi-path signal fading and the interference from neighbouring transmissions. A second difference between wired and wireless networks is the “mobility factor”. Mobility in wireless networks introduces a number of additional barriers in multimedia data transmission.1 aBouras, Christos1 aGkamas, Apostolos  uhttp://telematics.upatras.gr/telematics/publications/challenges-cross-layer-design-multimedia-transmission-over-wireless-networks