P-CSCFProxy Call Session Control Function
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designed a virtualized IMS testbed which contains virtualized P-CSCF, S-CSCF, HSS and UE (User Equipment) based on VMWare [7].
7) Informacion del servicio: despues de la seleccion del servicio de IPTV, por medio de la interfaz Rx, el P-CSCF (que conoce las caracteristicas del servicio que se va cursar) envia una notificacion al PCRF para el establecimiento de las politicas de control de QoS de este servicio (reglas PCC) [3].
Simulates P-CSCF, I-CSCF, S-CSCF, PCRF, HSS, BGCF, MGCF elements in LTE IMS network supporting Cx/Dx, Rx, Gx, Gm, Mw, SGi, Mi, and Mj interfaces
By the consideration of SIP sginlling, P-CSCF is a node to route and process SIP message for UE.
Here are the steps: 1) The UE sends REGISTER to the P-CSCF with its identity information.
Session border controllers - at LTE, 3G, Internet and fixed line access networks, Acme Packet SBCs provide the P-CSCF, E-CSCF, IMS-AGW functions in an IMS network.
P-CSCF is the first contact point in the signaling plane between the IMS terminal and the IMS network, and the I-CSCF is a SIP proxy located at the edge of an administrative domain.
Acme Packet's Net-Net SMX builds upon the Net-Net 4500 SD access SBC which already incorporates the IMS P-CSCF, E-CSCF, C-BGF and an industry-leading SIP signaling firewall function that is missing from IMS standards.
In IMS networks, Acme Packet SBCs perform the role of the P-CSCF and IMS-AGW for signaling and media control at the access border and the I-BCF and TrGW at the interconnect border.
Acme Packet SBCs deployed in local points of presence can perform as both the P-CSCF and E-CSCF to streamline and expedite the delivery of emergency calls to first responders.
Serving as a Back-to-Back User Agent (SIP B2BUA), the P-CSCF is responsible for forwarding SIP registration messages from the subscriber's endpoint, the User Element (UE), to the Interrogating-CSCF (I-CSCF) and subsequent call set-up requests and responses to the Serving-CSCF (S-CSCF).