name: GERAN
full_form: GSM EDGE Radio Access Network
context: When interworking with GERAN, UTRAN KH should be compatible with GERAN system. Not any changes shall be introduced by UTRAN KH. When moves from GERAN to enhanced UTRAN(handover or Idle mobility) with SGSN changes, because source SGSN may not transfer UE UTRAN KH capability to target SGSN+, all the operation is just the same as TS 33.102 defined. After connects to the enhanced and the network have known each otherâs capability, the network can trigger an AKA and SMC procedure (or just a SMC procedure) to establish the enhanced security context. Whether AKA is run after IRAT mobility is independent of whether forward security is used or not. When ME+ moves from GERAN to enhanced UTRAN (handover or Idle mobility) without SGSN change, if SGSN is an enhanced one, it can establish an enhanced security context directly from CK/IK which is derived from GSM cipher key Kc. When moves from enhanced UTRAN to GERAN (handover or Idle mobility), all the operations are just the same as described in TS
description: GERAN (GSM EDGE Radio Access Network) is a type of radio access network that provides connectivity for GSM and EDGE technologies. It is an integral part of the overall telecommunications infrastructure, enabling communication between user equipment and the core network.
explanation: The text refers to GERAN as a "radio access network" which directly connects user devices to the core network, defining its function within the telecommunications architecture.
section_title: 5.4.4	Interworking with GERAN
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biotag_Description: B-Network,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O