Title :
Seamless handover of streamed video over UDP between wireless LANs
Author :
Cunningham, Ger ; Murphy, Seán ; Murphy, Liam ; Perry, Philip
Author_Institution :
Dept. of Comput. Sci., Univ. Coll. Dublin, Ireland
Abstract :
The seamless handover of streamed video in a WLAN with UDP as the transport layer is considered. The use of handover for stationary nodes in the case of network congestion is motivated. Next, the relationship between delay and loss in WLANs is studied, with the conclusion that delay can be used as an indicator of when loss is likely to occur. Delay can therefore be used as a basis of a handover scheme which can minimize loss. Such a handover scheme is proposed in which the client makes two simultaneous connections to the same server through two separate WLANs, and it is shown that the client can use the relative packet delay between the two streams to determine which network delivers the best performance; this information is then used to determine when to perform a handover. The proposed scheme is implemented and results are presented that show the successful handover of an RTP over UDP stream using this scheme in a live WLAN environment.
Keywords :
delays; network servers; transport protocols; video streaming; wireless LAN; UDP; local area network; network congestion; packet delay; seamless handover; transport layer; video streaming; wireless LAN; Computer science; Delay; Educational institutions; Internet; Local area networks; Performance evaluation; Streaming media; Transport protocols; Wireless LAN; Wireless networks;
Conference_Titel :
Consumer Communications and Networking Conference, 2005. CCNC. 2005 Second IEEE
Print_ISBN :
0-7803-8784-8
DOI :
10.1109/CCNC.2005.1405184