D2D-capable variant of the HandoverController. It fills in the handover lifecycle hooks with D2D behavior: switching active D2D flows back to infrastructure mode before a handover, detaching/attaching the D2D AMC direction while executing it, and re-selecting the D2D mode once the handover has completed. Selected via 'handoverController.typename' / 'nrHandoverController.typename' by the D2D-capable UE NICs.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Extends

Name	Type	Description
HandoverController	simple module	UE-side component that manages handover decisions and procedures. Receives RSSI measurements from the PHY layer based on broadcast frames, and triggers handover when a better serving cell is detected.

Parameters

Name	Type	Default value	Description
dynamicCellAssociation	bool	false
enableHandover	bool	false	Allows handovers in the UE
isNr	bool		Whether this instance is associated with the NR or the LTE stack
macNodeId	int		MacNodeId of the stack leg this controller belongs to (set by the NIC)
handoverLatency	double	50ms	Handover duration
handoverDetachmentTime	double	handoverLatency > 0s ? handoverLatency/2 : 25ms
handoverAttachmentTime	double	handoverLatency > 0s ? handoverLatency-handoverDetachmentTime : handoverDetachmentTime
minRssiDefault	bool	true	Whether minRssi is taken from PhyPisaData instead of the minRssi parameter
minRssi	double	-99.0dB	Configurable minimum threshold RSSI for attaching to an eNB (meaningful only if minRssiDefault==false)
hysteresisFactor	double	10
binderModule	string	"binder"
macModule	string	"^.^.mac"
bearerManagementModule	string	"^.bearerManagement"
handoverPacketHolderModule	string	"^.^.handoverPacketHolder"
feedbackGeneratorModule	string	"^.^.dlFbGen"	TODO or "^.^.nrDlFbGen"
otherHandoverControllerModule	string	""
hasCollector	bool	false	True when node has a collector module (ueCollector/nrUeCollector) for this PHY module

Properties

Name	Value	Description
display	i=block/control
class	HandoverControllerD2D

Signals

Name	Type	Unit	Description
servingCell

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode	Description
servingCell	ID of the serving cell for the UE	servingCell	vector

Source code

//
// D2D-capable variant of the ~HandoverController. It fills in the handover
// lifecycle hooks with D2D behavior: switching active D2D flows back to
// infrastructure mode before a handover, detaching/attaching the D2D AMC
// direction while executing it, and re-selecting the D2D mode once the
// handover has completed. Selected via 'handoverController.typename' /
// 'nrHandoverController.typename' by the D2D-capable UE NICs.
//
simple HandoverControllerD2D extends HandoverController
{
    parameters:
        @class(HandoverControllerD2D);
}

File: src/simu5g/stack/d2d/rrc/HandoverControllerD2D.ned

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