lte-pdcp-sap.h

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/*
 * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Author: Manuel Requena <manuel.requena@cttc.es>
 */
 
#ifndef LTE_PDCP_SAP_H
#define LTE_PDCP_SAP_H
 
#include "ns3/packet.h"
 
namespace ns3
{
 
/**
 * Service Access Point (SAP) offered by the PDCP entity to the RRC entity
 * See 3GPP 36.323 Packet Data Convergence Protocol (PDCP) specification
 *
 * This is the PDCP SAP Provider
 * (i.e. the part of the SAP that contains the PDCP methods called by the RRC)
 */
class LtePdcpSapProvider
{
  public:
    virtual ~LtePdcpSapProvider();
 
    /**
     * Parameters for LtePdcpSapProvider::TransmitPdcpSdu
     */
    struct TransmitPdcpSduParameters
    {
        Ptr<Packet> pdcpSdu; /**< the RRC PDU */
        uint16_t rnti;       /**< the C-RNTI identifying the UE */
        uint8_t lcid; /**< the logical channel id corresponding to the sending RLC instance */
    };
 
    /**
     * Send RRC PDU parameters to the PDCP for transmission
     *
     * This method is to be called when upper RRC entity has a
     * RRC PDU ready to send
     *
     * \param params Parameters
     */
    virtual void TransmitPdcpSdu(TransmitPdcpSduParameters params) = 0;
};
 
/**
 * Service Access Point (SAP) offered by the PDCP entity to the RRC entity
 * See 3GPP 36.323 Packet Data Convergence Protocol (PDCP) specification
 *
 * This is the PDCP SAP User
 * (i.e. the part of the SAP that contains the RRC methods called by the PDCP)
 */
class LtePdcpSapUser
{
  public:
    virtual ~LtePdcpSapUser();
 
    /**
     * Parameters for LtePdcpSapUser::ReceivePdcpSdu
     */
    struct ReceivePdcpSduParameters
    {
        Ptr<Packet> pdcpSdu; /**< the RRC PDU */
        uint16_t rnti;       /**< the C-RNTI identifying the UE */
        uint8_t lcid; /**< the logical channel id corresponding to the sending RLC instance */
    };
 
    /**
     * Called by the PDCP entity to notify the RRC entity of the reception of a new RRC PDU
     *
     * \param params Parameters
     */
    virtual void ReceivePdcpSdu(ReceivePdcpSduParameters params) = 0;
};
 
/// LtePdcpSpecificLtePdcpSapProvider class
template <class C>
class LtePdcpSpecificLtePdcpSapProvider : public LtePdcpSapProvider
{
  public:
    /**
     * Constructor
     *
     * \param pdcp PDCP
     */
    LtePdcpSpecificLtePdcpSapProvider(C* pdcp);
 
    // Delete default constructor to avoid misuse
    LtePdcpSpecificLtePdcpSapProvider() = delete;
 
    // Interface implemented from LtePdcpSapProvider
    void TransmitPdcpSdu(TransmitPdcpSduParameters params) override;
 
  private:
    C* m_pdcp; ///< the PDCP
};
 
template <class C>
LtePdcpSpecificLtePdcpSapProvider<C>::LtePdcpSpecificLtePdcpSapProvider(C* pdcp)
    : m_pdcp(pdcp)
{
}
 
template <class C>
void
LtePdcpSpecificLtePdcpSapProvider<C>::TransmitPdcpSdu(TransmitPdcpSduParameters params)
{
    m_pdcp->DoTransmitPdcpSdu(params);
}
 
/// LtePdcpSpecificLtePdcpSapUser class
template <class C>
class LtePdcpSpecificLtePdcpSapUser : public LtePdcpSapUser
{
  public:
    /**
     * Constructor
     *
     * \param rrc RRC
     */
    LtePdcpSpecificLtePdcpSapUser(C* rrc);
 
    // Delete default constructor to avoid misuse
    LtePdcpSpecificLtePdcpSapUser() = delete;
 
    // Interface implemented from LtePdcpSapUser
    void ReceivePdcpSdu(ReceivePdcpSduParameters params) override;
 
  private:
    C* m_rrc; ///< RRC
};
 
template <class C>
LtePdcpSpecificLtePdcpSapUser<C>::LtePdcpSpecificLtePdcpSapUser(C* rrc)
    : m_rrc(rrc)
{
}
 
template <class C>
void
LtePdcpSpecificLtePdcpSapUser<C>::ReceivePdcpSdu(ReceivePdcpSduParameters params)
{
    m_rrc->DoReceivePdcpSdu(params);
}
 
} // namespace ns3
 
#endif // LTE_PDCP_SAP_H