Page 476 - 5G Basics - Core Network Aspects

1 Core network aspects

3.2.14 post-handover quality of service: The quality of service experienced after any transient conditions
due to handover have passed.

3.2.15 proactive QoS reservation: Reservation of QoS resources in advance of handover.
3.2.16 serving access point (or network): The access point (or network) providing service to the UE before
handover.
3.2.17 split scenario: A scenario in which mobility service is authorized by a separate AAA infrastructure
from that which authorizes transport service. Thus, in general two sets of user credentials are required to
complete the authorization process. This Recommendation assumes that the credentials for mobility service
are obtained from the UE during the network attachment process, but leaves the details to other
Recommendations.
3.2.18 target access point (or network): An access point or network which has been selected as the
intended new point of attachment (new serving access network) after handover.
3.2.19 tunnel: An IP-in-IP tunnel as provided by the various varieties of mobile IP.

3.2.20 tunnel lower end: The end of the tunnel closest to the UE.
3.2.21 tunnel upper end: The end of the tunnel furthest from the UE, coinciding with the anchor point.

4 Abbreviations and acronyms
This Recommendation uses the following abbreviations and acronyms:

4.1 Functions
HCF Handover Control Functions
HDF Handover Decision Function

L2HCF Layer 2 Handover Control Function
L3HCF Layer 3 Handover Control Function

L3HEF Layer 3 Handover Execution Function

4.2 Functional entities
ABG-FE Access Border Gateway Functional Entity

AM-FE Access Manager Functional Entity
AN-FE Access Node Functional Entity

AR-FE Access Relay Functional Entity
EN-FE Edge Node Functional Entity

HDC-FE Handover Decision and Control Functional Entity
HGWC-FE Home Gateway Configuration Functional Entity
IBG-FE Interconnection Border Gateway Functional Entity

L2HE-FE Layer 2 Handover Execution Functional Entity
MLM-FE Mobile Location Management Functional Entity

NAC-FE Network Access Configuration Functional Entity
NID-FE Network Information Distribution Functional Entity
NIR-FE Network Information Repository Functional Entity

PD-FE Policy Decision Functional Entity

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