lte-ue-cmac-sap.h

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/*
 * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Nicola Baldo <nbaldo@cttc.es>
 */
 
#ifndef LTE_UE_CMAC_SAP_H
#define LTE_UE_CMAC_SAP_H
 
#include <ns3/packet.h>
 
namespace ns3
{
 
class LteMacSapUser;
 
/**
 * Service Access Point (SAP) offered by the UE MAC to the UE RRC
 *
 * This is the MAC SAP Provider, i.e., the part of the SAP that contains the MAC methods called by
 * the RRC
 */
class LteUeCmacSapProvider
{
  public:
    virtual ~LteUeCmacSapProvider();
 
    /// RachConfig structure
    struct RachConfig
    {
        uint8_t numberOfRaPreambles;  ///< number of RA preambles
        uint8_t preambleTransMax;     ///< preamble transmit maximum
        uint8_t raResponseWindowSize; ///< RA response window size
        uint8_t connEstFailCount;     ///< the counter value for T300 timer expiration
    };
 
    /**
     * Configure RACH function
     *
     * \param rc the RACH config
     */
    virtual void ConfigureRach(RachConfig rc) = 0;
 
    /**
     * tell the MAC to start a contention-based random access procedure,
     * e.g., to perform RRC connection establishment
     *
     */
    virtual void StartContentionBasedRandomAccessProcedure() = 0;
 
    /**
     * tell the MAC to start a non-contention-based random access
     * procedure, e.g., as a consequence of handover
     *
     * \param rnti
     * \param rapId Random Access Preamble Identifier
     * \param prachMask
     */
    virtual void StartNonContentionBasedRandomAccessProcedure(uint16_t rnti,
                                                              uint8_t rapId,
                                                              uint8_t prachMask) = 0;
 
    /// LogicalChannelConfig structure
    struct LogicalChannelConfig
    {
        uint8_t priority;                ///< priority
        uint16_t prioritizedBitRateKbps; ///< prioritize bit rate Kbps
        uint16_t bucketSizeDurationMs;   ///< bucket size duration ms
        uint8_t logicalChannelGroup;     ///< logical channel group
    };
 
    /**
     * add a new Logical Channel (LC)
     *
     * \param lcId the ID of the LC
     * \param lcConfig the LC configuration provided by the RRC
     * \param msu the corresponding LteMacSapUser
     */
    virtual void AddLc(uint8_t lcId, LogicalChannelConfig lcConfig, LteMacSapUser* msu) = 0;
 
    /**
     * remove an existing LC
     *
     * \param lcId
     */
    virtual void RemoveLc(uint8_t lcId) = 0;
 
    /**
     * reset the MAC
     *
     */
    virtual void Reset() = 0;
 
    /**
     *
     * \param rnti the cell-specific UE identifier
     */
    virtual void SetRnti(uint16_t rnti) = 0;
 
    /**
     * \brief Notify MAC about the successful RRC connection
     * establishment.
     */
    virtual void NotifyConnectionSuccessful() = 0;
 
    /**
     * \brief A method call by UE RRC to communicate the IMSI to the UE MAC
     * \param imsi the IMSI of the UE
     */
    virtual void SetImsi(uint64_t imsi) = 0;
};
 
/**
 * Service Access Point (SAP) offered by the UE MAC to the UE RRC
 *
 * This is the MAC SAP User, i.e., the part of the SAP that contains the RRC methods called by the
 * MAC
 */
class LteUeCmacSapUser
{
  public:
    virtual ~LteUeCmacSapUser();
 
    /**
     *
     *
     * \param rnti the T-C-RNTI, which will eventually become the C-RNTI after contention resolution
     */
    virtual void SetTemporaryCellRnti(uint16_t rnti) = 0;
 
    /**
     * Notify the RRC that the MAC Random Access procedure completed successfully
     *
     */
    virtual void NotifyRandomAccessSuccessful() = 0;
 
    /**
     * Notify the RRC that the MAC Random Access procedure failed
     *
     */
    virtual void NotifyRandomAccessFailed() = 0;
};
 
} // namespace ns3
 
#endif // LTE_UE_CMAC_SAP_H