re Inter Cell RRM RB Control Connection Mobility Cont. Radio Admission Control NAS Security eNB Measurement Configuration & Provision Idle State Mobility Dynamic Resource Handling Allocation (Scheduler) EPS Bearer Control Mobility UE IP address Anchoring allocation Packet Filtering Internet E-UTRAN Figure 8.8 Functional split between radio access and core network. Reproduced with permission from C 3GPP [15] Next Generation Mobile Communications Ecosystem HLR/AuC INTERNET Figure 8.9 CDMA2000 1xRTT core network Serving GW: The Serving Gateway connects to EUTRAN via S1-U interface. For each UE associated with the EPS, at a given point of time, there is one single Serving Gateway. Some of the Serving GW functions include: The local Mobility Anchor point for inter-eNodeB handover. Mobility anchoring for inter-3GPP mobility. EUTRAN idle mode downlink packet buffering and initiation of network triggered service request procedure. Transport level packet marking in uplink and downlink. Lawful Interception. Packet routing and forwarding. PDN GW: The PDN GW serves as the entering node in EPS. It is connected to externals PDNs, operators IMS and non-IMS IP services and provides access for trusted and non- trusted non-3GPP IP networks. If a UE is accessing multiple PDNs, there may be more than one PDN GW for that UE. Some PDN GW functions include: Mobility anchor for mobility between 3GPP and non-3GPP access systems. Policy enforcement. Per-user based packet filtering (by e.g., deep packet inspection3. Charging support Transport level packet marking in the uplink and downlink. Lawful Interception. UE IP address allocation. 8.2.2 3GPP2 Core This section will briefly describe the evolution of CN from cdma2000 to UMB. CDMA2000 1xRTT as we know was the first 3GPP2 standard that introduced packet data service. Figure 8.9 shows the Deep Packet Inspection enables advanced security functions as well as Internet data mining, eavesdropping, and censorship. Core Networks and Operations Support Systems IMS/MMD INTERNET Foreign Agent Home