LteMacPdu¶

//
// MAC PDU. MAC PDUs in LTE and NR are similar, with differences that mostly
// affect the layout of the packet. This class is an abstract representation
// that is suitable for both LTE and NR.
//
// LCIDs size depends between LTE (5 bits) and NR (6 bits), as well the layout
// of the PDU (in LTE, subheaders that contain the LCIDs are at the beginning
// of the SDU, while in NR, a subPDU header precedes each SDU.) However, the logical
// content is the same.
//
// This class stores LCIDs and SDUs in separate arrays, but an NR serializer
// or a more faithful chunked representation can store it like NR does.
//
// For control elements, there is no need for the class to store the LCIDs,
// as they correspond one-to-one to C++ subclasses of MacControlElement.
//
class LteMacPdu extends inet::FieldsChunk
{
    // ID of the MAC PDU
    int64_t macPduId_ = getChunkId();

    // Length of the PDU
    int64_t macPduLength_ = 0;

    // LCID for each SDU (same array size as sdu[])
    LogicalCid lcid[];

    // List Of MAC SDUs
    inet::Packet* sdu[] @owned @getter(getSduPtr);

    // List of MAC CEs
    MacControlElement* ce[] @owned;

    unsigned int headerLength = 0;

    // need separate macPduId (e.g. for feedback packets) since OMNET PDU id is automatically updated
    // whenever a new packet is created, e.g. when this PDU is duplicated
    long macPduId = 0;
}