sip stands for peer - to - peer in the ngn / ims context.
sip stands for peer - to - peer in the ngn / ims context.
what does sip stand for in the ngn / ims context?
peer - to - peer
the cdma2000 standard released in march 2010 differs slightly by adopting the session initiation protocol (sip) to set up a connection between the femtocell and a femtocell convergence server (fcs). voice calls are routed through the fcs which emulates an msc. sip is not required or used by the mobile device itself. in the sip architecture, the femtocell connects to a core network of the mobile operator that is based on the sip/ims architecture. this is achieved by having the femtocells behave toward the sip/ims network like a sip/ims client by converting the circuit-switched 3g signaling to sip/ims signaling, and by transporting the voice traffic over rtp as defined in the ietf standards.
femtocell
source routing is the mechanism that allows the sender of a message to specify partially or completely the route the message traverses. in sip, the "route" header field, filled by the sender, supports this functionality by listing a set of proxies the message will visit. in the ims context, there are certain network entities (i.e. certain cscfs) that must be traversed by requests from or to a user, so they are to be listed in the "route" header field. to allow the sender to discover such entities and populate the "route" header field, there are mainly two extension header fields: "path" and "service-route".
sip extensions for the ip multimedia subsystem