name: HO
full_form: Handover
context: Kenb. The random number is sent to UE during HO and UE uses it with K'ASME to derive Kenb. Figure 23 Kenb Derivation during UTRAN to EUTRAN HO 1, Source RNC makes HO decision base on measurement report or other conditions. 2, Source RNC sends Relocation request to Source SGSN. 3, Source SGSN forwards Relocation request to Target MME. In this message, IK, CK are sent to the target MME. 4, Target MME derives K'ASME using IK, CK. 5, Target MME generates a random number, and uses K'ASME and this random number to derive Kenb. 6, In HO request, target MME sends Kenb to target eNB. 7, The Target eNB replies HO request Ack. 8, In Forward relocation response, relocation command, and HO from UTRAN command, the random number is transferred to UE. Note that HO from UTRAN command is protected by UTRAN security, so is the random number. 9, UE derives K'ASME using IK, CK. UE derives Kenb using K'ASME and the random number. 10. UE sends HO complete to target eNB. 10, Target eNB sends HO notify
description: Handover (HO) is a procedure in telecommunications that involves the transfer of a user's connection from one network or cell to another while maintaining continuity of service. This process ensures seamless communication and prevents dropped calls or lost data sessions.
explanation: The context describes a step-by-step process with specific actions and message exchanges between network components, indicating a defined procedure.
section_title: 7.4.13.5	Key handling on handover from UTRAN to E-UTRAN
biotag_Context: O,O,O,O,O,O,O,B-Device,O,B-Procedure,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,B-Network,B-Procedure,O,O,B-Network Function,O,B-Procedure,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Procedure,O,O,B-Network Function,O,O,O,O,O,O,O,O,B-Network Function,O,B-Procedure,O,O,O,O,O,O,O,O,O,O,B-Procedure,O,B-Network,O,O,O,O,O,O,O,O,O,O,B-Procedure,O,B-Network,O,O,O,O,B-Network,O,O,O,O,O,O,O,B-Device,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,B-Device,O,B-Procedure,O,O,O,O,O,O,B-Network Function,O,B-Procedure,O
biotag_Description: B-Procedure,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O