ISSN : 1796-2021
Volume : 1    Issue : 5    Date : Auguest 2006

Bandwidth Allocation and Session Scheduling using SIP
Hassan Hassan, Jean-Marie Garcia and Olivier Brun
Page(s): 17-27
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Session Initiation Protocol (SIP) is a new signaling protocol designed to establish multimedia
sessions in telecommunication networks. In this paper, we suggest the extension of SIP
functionalities to coordinate QoS mechanisms deployed in IP networks, and especially in DiffServ
domain. Indeed, the interaction between small and big TCP sessions may have dramatic
consequences on small TCP sessions. Hence, we use SIP to achieve QoS management on a
session basis, in which the over all activity of the user during the session is considered. The
suggested mechanisms deal with two issues: first, session scheduling based on session duration
and/or volume, and second bandwidth allocation on a per-flow basis using equivalent bandwidth
estimation techniques. The proposed mechanisms are implemented in the SIP proxy server as
QoS management algorithms, and they are validated by simulations.

Index Terms
SIP, DiffServ, Web, QoS, Bandwidth allocation, Scheduling