LTE系统由接入网和核心网组成,接入网的网元主要由ENODEB组成,请问以下网元中哪个是LTE系统的核心网设备?()
A: MME(MobilityManagementEntity)
B: BSC(BaseStationController)
C: RNC(RadioNetworkController)
D: SGSN(ServingGPRSSupportNode)
A: MME(MobilityManagementEntity)
B: BSC(BaseStationController)
C: RNC(RadioNetworkController)
D: SGSN(ServingGPRSSupportNode)