name: HR
full_form: Home Routed
context: The Phase-1 of HR LI that applies to all inbound roaming UEs with home-routed roaming using the IMS-based services include the functions that revolve around the following interfaces (see TS 33.127 [5]): - LI_X1: Used by the LIPF to provision the BBIFF-C/BBIFF and optionally, the LMISF-IRI to enable the same for HR LI (aka initial configuration of HR LI). - LI_T3: Used by the BBIFF-C to instruct the BBIFF-U to capture and deliver the IMS signaling related user plane packets of inbound roaming UEs to the LMISF-IRI. - LI_X2_LITE: Used by the BBIFF-C/BBIFF to carry the control plane information (e.g. packet data connection related notifications, UE location) to LMISF-IRI for inbound roaming UEs. - LI_X3_LITE_S: Used by the BBIFF-U/BBIFF to forward the IMS signalling related user plane packets of inbound roaming UEs to the LMISF-IRI. The triggering interface LI_T3 is not used in the case of BBIFF in SGW. The LI_X3_LITE_S is also used in HR LI Phase-2. The LI_X2_LITE shall be realized using
description: Home Routed (HR) refers to a mode of operation where the user equipment's (UE) traffic is routed through its home network, even when roaming in another network. This allows for more efficient use of network resources and better management of UE mobility.
explanation: The context describes HR as a specific way of handling inbound roaming UEs with IMS-based services, indicating it is an operational mode rather than a protocol, interface, or any other entity type.
section_title: 7.10.3.1	Overview
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