NR (TS 38.322) transmission side of the Unacknowledged Mode (UM) of the RLC layer: SI + byte-offset (SO) segmentation, one SDU segment per PDU, one sequence number per SDU. Shares the common RlcUmTxEntityBase shell (MAC plumbing, D2D mode-switch machinery) with the LTE profile LteRlcUmTxEntity. Bound by default inside the NrRlcUmEntity compound. The NR SO-segmentation statistics are declared here so they are recorded only for NR entities.

Inheritance diagram

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

Known subclasses

Name	Type	Description
NrRlcUmTxEntityD2D	simple module	D2D-capable NR (TS 38.322) RLC UM transmitting entity: NrRlcUmTxEntity plus the same D2D mode-switch machinery as LteRlcUmTxEntityD2D, over the SO segmentation buffer.

Parameters

Name	Type	Default value	Description
macModule	string	"^.^.mac"	Set by the enclosing RlcUmEntityBase compound (per leg)
sn_FieldLength	int	12	UM SN field length in bits: 6 or 12

Properties

Name	Value	Description
dynamic	true
display	i=block/layer

Gates

Name	Direction	Size	Description
in	input		SDUs from the PDCP layer (direct per-DRB connection, not via a mux)
macIn	input		MAC SDU requests, via the RlcMux
out	output		PDUs and new-data notifications to MAC, via the RlcMux

Signals

Name	Type	Unit	Description
wastedGrantedBytes
requestedPduSize
sentPduSize
receivedPacketFromUpperLayer
sentPacketToLowerLayer

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode	Description
wastedGrantedBytes	Wasted granted bytes	wastedGrantedBytes	sum	B
requestedPduSize	Requested PDU size	requestedPduSize	vector	B
sentPduSize	Sent PDU size	sentPduSize	vector	B
receivedPacketFromUpperLayer		receivedPacketFromUpperLayer	count, sum(packetBytes)		none
sentPacketToLowerLayer		sentPacketToLowerLayer	count, sum(packetBytes)		none

Source code

//
// NR (TS 38.322) transmission side of the Unacknowledged Mode (UM) of the RLC
// layer: SI + byte-offset (SO) segmentation, one SDU segment per PDU, one sequence
// number per SDU. Shares the common RlcUmTxEntityBase shell (MAC plumbing, D2D
// mode-switch machinery) with the LTE profile ~LteRlcUmTxEntity. Bound by
// default inside the ~NrRlcUmEntity compound. The NR SO-segmentation statistics
// are declared here so they are recorded only for NR entities.
//
simple NrRlcUmTxEntity like simu5g.stack.rlc.IRlcTxEntity
{
    parameters:
        @dynamic(true);
        @display("i=block/layer");
        string macModule = default("^.^.mac");  // Set by the enclosing RlcUmEntityBase compound (per leg)
        int sn_FieldLength = default(12);   // UM SN field length in bits: 6 or 12

        @signal[wastedGrantedBytes];
        @statistic[wastedGrantedBytes](title="Wasted granted bytes"; unit="B"; source="wastedGrantedBytes"; record=sum);
        @signal[requestedPduSize];
        @statistic[requestedPduSize](title="Requested PDU size"; unit="B"; source="requestedPduSize"; record=vector);
        @signal[sentPduSize];
        @statistic[sentPduSize](title="Sent PDU size"; unit="B"; source="sentPduSize"; record=vector);
        @signal[receivedPacketFromUpperLayer];
        @statistic[receivedPacketFromUpperLayer](source="receivedPacketFromUpperLayer"; record=count,"sum(packetBytes)"; interpolationmode=none);
        @signal[sentPacketToLowerLayer];
        @statistic[sentPacketToLowerLayer](source="sentPacketToLowerLayer"; record=count,"sum(packetBytes)"; interpolationmode=none);

    gates:
        input in;       // SDUs from the PDCP layer (direct per-DRB connection, not via a mux)
        input macIn;    // MAC SDU requests, via the RlcMux
        output out;     // PDUs and new-data notifications to MAC, via the RlcMux
}

File: src/simu5g/stack/rlc/um/NrRlcUmTxEntity.ned

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