name: NCC
full_form: Next hop Chaining Counter
context: If the NCC value the ME+ received in the Physical Channel Reconfiguration message or UTRAN Mobility Information message from target RNC+ is equal to the NCC value stored in the ME+, the ME+ shall directly use the KRNC* as KRNC to derive CKU/IKU. If the ME+ received an NCC value that was different from the NCC associated with the currently active KRNC, the ME+ shall first synchronize the locally kept KRNC* parameter iteratively, and increasing the NCC value until it matches the NCC value received from the source RNC+. When the NCC values match, the shall use the KRNC* as KRNC to compute the IKU/CKU.
description: The Next hop Chaining Counter (NCC) is a parameter used in handover procedures in UTRAN networks. It is utilized by the Mobile Equipment (ME) to determine whether to directly use the Key RNC (KRNC) for deriving Ciphering Keys (CKU/IKU) or to synchronize the locally kept KRNC parameter iteratively until the NCC values match.
explanation: The context explicitly mentions NCC as a value received in messages and stored in the ME, which is used for decision-making regarding KRNC usage. This indicates that NCC is a critical network attribute for operation, fitting the definition of a Parameter.
section_title: 5.1.3.3.3	ME handling
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