name: HFN
full_form: Hyper Frame Number
context: is the same as the one in the corresponding RESET PDU: - set the HFN value (DL HFN when the RESET ACK PDU is received in UE or UL HFN when the RESET ACK PDU is received in UTRAN) to the HFNI field of the received RESET ACK PDU; - reset the state variables described in subclause 9.4 to their initial values; - stop all the timers described in subclause 9.5; - reset configurable parameters to their configured values; - discard all RLC PDUs in the receiving side of the AM RLC entity; - discard all RLC SDUs that were transmitted before the reset in the transmitting side of the AM RLC entity; - increase with one the UL HFN and DL HFN, and the updated HFN values shall be used for the first transmitted and received AMD PDUs after the reset procedure; - otherwise (if the received RSN value is not the same as the one in the corresponding RESET PDU): - discard the RESET ACK PDU; - otherwise (if the Sender has not transmitted a RESET PDU which has not been yet acknowledged by a RESET ACK PDU): -
description: The Hyper Frame Number (HFN) is a critical network attribute used in the Radio Link Control (RLC) reset procedure to manage the transmission and reception of RLC PDUs. It is utilized to ensure proper synchronization and sequencing of data transmission between the UE and UTRAN.
explanation: The context explicitly mentions HFN as a value that needs to be set, increased, or compared during the RLC Reset procedure, indicating its role as a parameter in controlling network operations.
section_title: 7.2.3.33Operation of the RLC Reset procedure / UE Originated
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