Conference Paper

Soft Handover Mechanism For IPTV Service Over Wireless Networks

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Abstract

This paper proposes handover mechanism to support terminal mobility for IPTV services in wireless network environment. The proposed algorithm improves service disruption using SIP signaling and dual interfaces of mobile terminal. Then, we discuss how to deploy overall system for seamless IPTV service.

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... • In the application layer as SIP [27] . In [28] , a SIP based method has been proposed, but SIP is not appropriate for handling handover in multimedia systems since it has some drawbacks [29] and causes packet loss within handover procedure. In [28][29][30][31] , it has been stated that the methods used in mobile IP for handover procedure have some drawbacks and are not efficient for IPTV traffic. ...
... In [28] , a SIP based method has been proposed, but SIP is not appropriate for handling handover in multimedia systems since it has some drawbacks [29] and causes packet loss within handover procedure. In [28][29][30][31] , it has been stated that the methods used in mobile IP for handover procedure have some drawbacks and are not efficient for IPTV traffic. ...
... • In the application layer as SIP [27] . In [28] , a SIP based method has been proposed, but SIP is not appropriate for handling handover in multimedia systems since it has some drawbacks [29] and causes packet loss within handover procedure. In [28][29][30][31] , it has been stated that the methods used in mobile IP for handover procedure have some drawbacks and are not efficient for IPTV traffic. ...
... In [28] , a SIP based method has been proposed, but SIP is not appropriate for handling handover in multimedia systems since it has some drawbacks [29] and causes packet loss within handover procedure. In [28][29][30][31] , it has been stated that the methods used in mobile IP for handover procedure have some drawbacks and are not efficient for IPTV traffic. ...
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In wireless LANs (WLANs), handover is usually performed based on either signal power or congestion level. However, considering only the congestion level could be insufficient for handover since it may cause traffic loss. Therefore, besides the load of access points (APs), it is necessary to consider the physical conditions of different WLANs for performing a seamless handover. This article introduces a novel scheme for seamless handover of IPTV streams in WLAN carrying IPTV traffic, called Physical Constraint and Load Aware (PCLA) handover. The PCLA can compute the load of APs for congestion detection purposes. In PCLA, a mobile node chooses the best network considering signal strength, bit error rate in the relevant environment, and the congestion of APs for making a seamless handover. The simulation results show the appropriateness of PCLA in improving handover performance.
... The second approach utilises a make-before-break strategy. This is typically referred to as a Soft Handoff (SHO) [10], [11]. In SHO, for a period of time, the MS has two active interfaces and sends and receives signaling and data packets though both interfaces. ...
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Working Document: IPTV Services Requirements
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