Main features of 3GPP R4 core network (CS domain): The main changes of R4 are in the circuit domain, introducing a core network architecture based on soft switching. Hierarchical network structure: separation of call and bearer (MSC is separated into MSC server and media gateway) Circuit domain call signaling based on BICC Core network circuit domain supports TDM, ATM AAL2, IP bearer signaling IP bearer mechanism: Support IP transmission of signaling (MAP, CAP...) in the core network TFO/TrFO technology Security enhancement: IPSec, Changes in MAPSec3G network: The current VMSC controls the integrated structure of call signaling connection and traffic connection, which is changed to a hierarchical structure with separate signaling control and traffic connection; the signaling connection responsible for call and service establishment is completed by the control layer in the hierarchical network structure, and the nodes of the control layer include HLR and MSC-Server, GMSC-Server, etc. differentiated from the existing MSC; the traffic connection is completed by the connection layer in the hierarchical network, and MGW is added to the connection layer; MGW is placed at the access point of each wireless network and at the edge of other PSTN/PLMN networks as much as possible, and the flat structure realizes local switching and simplifies the network structure; the connection layer should use IP transmission technology as the bearer technology for signaling, traffic, business and other loads, and use IP/MPLS backbone network as the transmission network; the existing TDM transmission equipment is eliminated. Features of Ericsson\'s 3G network: Adopts GSM and WCDMA wireless access technologies; core network adopts a layered network structure based on 3GPP R4 specifications; MSC-Server in Pool and SGSN in Pool provide security for the control layer; MGW Pool supports flexible connection carried by the Iu interface, providing security for the connection layer; the flat structure of the connection layer simplifies the network structure; Migration Feature supports the smooth evolution of the existing network to layered, protecting the existing network investment; IP transmission technology is oriented to future business development; TrFO/TFO and broadband AMR ensure the rational use of bandwidth and excellent voice quality.
You Might Like
Recommended ContentMore
Open source project More
Popular Components
Searched by Users
Just Take a LookMore
Trending Downloads
Trending ArticlesMore