… registration and reregistration procedure in IMS. In Section 4 we introduce our proposal for
re-registration procedure. We … Therefore in reregistration procedure Tregister is modified as: …

… Therefore, if users are not registered, they cannot access … from reaching the IMS core.
Other types of registration avalanches can occur due to a normal re-registration process in a …

… to use IMS services. For management purpose, UE is required to perform re-registration … It
is expected to see initially the affected S-CSCF to experience higher traffic load and therefore …

… reregistration at IMS as illustrated in Figure 1. UE exchanges messages over Gm interface to
initiate registration process … Therefore the delay of handover preparation is equal to time of …

… When the IMS is deployed there will be a lot of UE in the market place that does not
support the ISIM application; therefore, a mechanism to access the IMS without the ISIM was …

… between the UE and the IMS network and between IMS network entities regardless of the
underlaying core network (eg, RAN and GPRS). Therefore, the IMS provides at least a similar …

… This process will take a sizable handover delay; therefore, we intend to explore possible …
IMS (E-IMS) AKA [17] for shortening the IMS re-registration process, referred to as CSC …

… Therefore, we need a mechanism to achieve registration procedure in a short time for providing
… The reregistration is achieved through IMS registration procedure illustrated in Figure 1. …

… Therefore, we integrate the IMS AKA with the certificate to improve the registration procedure…
Then, we illustrate the C-IMS AKA for initial registration and re-registration procedures, …

… Therefore, the investigation of the IMS added delay in the registration … and IMS network. In
[9] the reregistration procedure modification was proposed to reduce the transmission delay in …