name: ISL
full_form: Inter-Satellite Links
context: The NG-RAN logical architecture as described in TS 38.401 is used as baseline for NTN scenarios. The satellite payload implements regeneration of the signals received from Earth. â NR-Uu radio interface on the service link between the UE and the satellite â Satellite Radio Interface (SRI) on the feeder link between the NTN gateway and the satellite. SRI (Satellite Radio Interface) is a transport link between NTN GW and satellite. Figure 5.2.1-1: Regenerative satellite without ISL, gNB processed payload NOTE: The satellite may embark additional traffic routing functions that are out of RAN scope. The satellite payload also provides Inter-Satellite Links (ISL) between satellites ISL (Inter-Satellite Links) is a transport link between satellites. ISL may be a radio interface or an optical interface that may be 3GPP or non 3GPP defined but this is out of the study item scope. The NTN GW is a Transport Network Layer node, and supports all necessary transport protocols. Figure 5.2.1-2:
description: Inter-Satellite Links (ISL) refers to the communication pathways between satellites, enabling data exchange and coordination among them. ISL can be either a radio interface or an optical interface, and may be defined by 3GPP or non-3GPP standards.
explanation: The context explicitly mentions that ISL is a transport link between satellites, which aligns with the definition of an Interface in the predefined categories. The fact that it can be either radio or optical and may follow different standards further supports this classification.
section_title: 5.2.1.1Overview
biotag_Context: O,B-Network Function,O,O,O,O,O,B-Specification,O,O,O,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,B-Interface,O,O,O,O,O,O,O,B-Network,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,B-Network,B-Network Function,O,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,B-Network,O,O,O,O,O,O,B-Interface,I-Interface,O,O,O,B-Interface,O,O,O,O,O,O,O,O,B-Interface,O,O,O,O,O,O,O,O,O,O,O,O,B-Organization,O,O,B-Organization,O,O,O,O,O,O,O,O,O,O,O,B-Network,B-Network Function,O,O,B-Network,I-Network,I-Network,O,O,O,O,O,O,O,O,O
biotag_Description: B-Interface,I-Interface,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Interface,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Organization,O,O,O