Publication Type:
Conference PaperSource:
(2009)Keywords:
IPTV; Handover; Streamed Video; Wireless LAN1.Abstract:
A robust mechanism to enable seamless handover of
streamed IPTV in a WLAN is presented. Handover in a wireless
network is usually based on signal strength measurements, but
that approach does not consider levels of congestion within the
network. Here, the case of stationary nodes with varying levels of
network congestion is considered. A scheme that analyses the
jitter is used to establish the relationship between congestion and
loss in WLANs. This Moving Average of Negative Jitter is used as
the basis of a handover scheme which can minimize loss. The
handover scheme uses a client with two simultaneous connections
to the same server through two separate WLANs, and it is shown
that the client can compare the jitter in 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 in a live WLAN environment. The test scenario used is
aimed at “Over-The-Top” service delivery, but the core
algorithm is expected to be more broadly applicable.
| Attachment | Size |
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| seamless.pdf | 121.57 KB |
