| Abstract
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The 3rd Generation Partnership Project (3GPP) has selected SIP [2]as
the session establishment protocol for the 3GPP IP Multimedia Core
Network Subsystem (IMS). IMS is part of the Release 5 of the 3GPP
specifications. Although SIP is a protocol that fulfills most of the
requirements to establish a session in an IP network, SIP has never
been evaluated against the specific 3GPP requirements for operation
in a cellular network. In this document we express the requirements
identified by 3GPP to support SIP for the Release 5 of the 3GPP IMS
in cellular networks.
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