The Telecom Protocols

SRVCC enables continuity of voice call anchored in IMS network, when UE changes its access network from packet based in eUTRAN to circuit based GERAN or UTRAN, without requiring the UE to have simultaneous access to both the radio network.   It accomplishes this by enhancing the MMEs, serving E-UTRAN and the 3GPP CS MSC serving GERAN/UTRAN such that when the UE is still anchored within the E-UTRAN network and triggers a measurement report indicating a need for handover (HO) to GERAN/UTRAN, the MSC can initiate IMS service continuity procedure towards the IMS domain in addition to preparing for a handover into its GERAN/UTRAN access, before the UE is directed to change its access network to GERAN/UTRAN.     The SRVCC feature requires the new Sv interface between MSC and MME. Sv Interface runs over UDP. Following messages are exchanged over Sv Interface:   - PS to CS Request - PS to CS Response - PS to CS Complete Notification - PS to CS ...

    Diameter is AAA (authentication, Authorization, and Accounting protocol) such as RADIUS protocol. As name suggest, DIAMETER is double of RADIUS protocol. while there are many difference between two protocols but one of the main difference is diameter provides the security and reliability because diameter uses TCP/SCTP on transport level, it uses TLS and DTLS. whereas RADIUS runs over the UDP.   Diameter protocol is peer to peer protocol so that any node can initiates a request, all data delivered in form of AVPs and provides following facilities:   - Ability to exchange messages and deliver AVPs. - Capability Negotiation - Error Notification - Application specific services.     Diameter base protocol is run on port 3868 for both TCP and SCTP. TLS and Datagram Transport Layer Security (DTLS) uses port 5658. It is assumed TLS run on top of TCP and DTLS is run on top of SCTP. When no transport connection availa...

Why LTE?  The first question came into mind is why LTE? we are having 2G and 3G well established in market, then what is the requirement of LTE or so called 4G. But before proceeding let me clear LTE is not considered as 4G but the 3.9G due to some limitation. To answer the question, the subscribers and business users are discovered the power of wireless broadband through the advanced phones. Today internet are used for video streaming, live video, You Tube,  Maps, Social Sites and web search. Because of so much to do on internet, consumers wants the high speed in data transfer on the go and the solution is LTE. The standards of LTE developed by 3GPP. LTE Provides following features and application for users and business: Improve QoS by decreasing the latency time. provide the connectivity for non-traditional device like cars provide the communication, entertainments, personal assistance. Improving the services Reducing th...