This module serves as a descriptor for one Component Carrier (CC) of a Carrier Aggregation (CA)-enabled 4G/5G network. The module is assigned a carrier frequency (which also acts as a unique identifier for the CC in the system), a bandwidth, and a numerology index (in the range of 0 to 4). It can be configured with either Frequency Division Duplex (FDD) or Time Division Duplex (TDD) mode. In the latter case, the number of uplink and downlink symbols per slot can be specified (the sum of uplink and downlink symbols must be less than or equal to 14, which is the total number of symbols in one slot).

Used in compound modules

Name	Type	Description
CarrierAggregation	compound module	This module implements the Carrier Aggregation (CA) functionality used at the Medium Access Control (MAC) layer of e/gNodeBs and UEs. CA allows multiple frequency bands - referred to as Component Carriers (CCs) - to be aggregated in order to increase the overall available bandwidth of the system. Each CC is implemented as a submodule and can be configured independently from each other. e/gNodeB and UE can be configured to use one or more CCs among those configured in this module. There must be one (and only one) instance of this module in the network.

Parameters

Name	Type	Default value	Description
binderModule	string	"binder"
carrierFrequency	double	2GHz	Carrier Frequency (GHz) -->
numBands	int	6	number of bands for this channel
numerologyIndex	int	0	numerology index
useTdd	bool	false
tddNumSymbolsDl	int	7
tddNumSymbolsUl	int	7

Properties

Name	Value	Description
display	i=block/control
class	ComponentCarrier

Source code

//
// This module serves as a descriptor for one Component Carrier (CC) of a Carrier Aggregation (CA)-enabled 4G/5G network.
// The module is assigned a carrier frequency (which also acts as a unique identifier
// for the CC in the system), a bandwidth, and a numerology index (in the range of 0 to 4).
// It can be configured with either Frequency Division Duplex (FDD) or Time
// Division Duplex (TDD) mode. In the latter case, the number of uplink and
// downlink symbols per slot can be specified (the sum of uplink and downlink symbols
// must be less than or equal to 14, which is the total number of symbols in one
// slot).
//
simple ComponentCarrier
{
    parameters:
        @display("i=block/control");
        @class("ComponentCarrier");

        string binderModule = default("binder");

        // Carrier Frequency (GHz) -->
        double carrierFrequency @unit("GHz") = default(2GHz);

        // number of bands for this channel
        int numBands = default(6);

        // numerology index
        int numerologyIndex = default(0);

    // TDD slot format index
    // values in the range [0,61], according to 3GPP TS38.213
    // THIS IS TO BE DONE
//    int tddSlotFormatIndex = default(-1); // -1 stands for FDD

        bool useTdd = default(false);
        int tddNumSymbolsDl = default(7);
        int tddNumSymbolsUl = default(7);
}

File: src/common/carrierAggregation/ComponentCarrier.ned

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