gateway-lora-phy.cc

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/*
 * Copyright (c) 2017 University of Padova
 *
 * 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: Davide Magrin <magrinda@dei.unipd.it>
 */
 
#include "gateway-lora-phy.h"
 
#include "lora-tag.h"
 
#include "ns3/log-macros-enabled.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
 
namespace ns3
{
namespace lorawan
{
 
NS_LOG_COMPONENT_DEFINE("GatewayLoraPhy");
 
NS_OBJECT_ENSURE_REGISTERED(GatewayLoraPhy);
 
/**************************************
 *    ReceptionPath implementation    *
 **************************************/
GatewayLoraPhy::ReceptionPath::ReceptionPath()
    : m_available(true),
      m_event(nullptr),
      m_endReceiveEventId(EventId())
{
    NS_LOG_FUNCTION_NOARGS();
}
 
GatewayLoraPhy::ReceptionPath::~ReceptionPath()
{
    NS_LOG_FUNCTION_NOARGS();
}
 
bool
GatewayLoraPhy::ReceptionPath::IsAvailable() const
{
    return m_available;
}
 
void
GatewayLoraPhy::ReceptionPath::Free()
{
    m_available = true;
    m_event = nullptr;
    m_endReceiveEventId = EventId();
}
 
void
GatewayLoraPhy::ReceptionPath::LockOnEvent(Ptr<LoraInterferenceHelper::Event> event)
{
    m_available = false;
    m_event = event;
}
 
void
GatewayLoraPhy::ReceptionPath::SetEvent(Ptr<LoraInterferenceHelper::Event> event)
{
    m_event = event;
}
 
Ptr<LoraInterferenceHelper::Event>
GatewayLoraPhy::ReceptionPath::GetEvent()
{
    return m_event;
}
 
EventId
GatewayLoraPhy::ReceptionPath::GetEndReceive()
{
    return m_endReceiveEventId;
}
 
void
GatewayLoraPhy::ReceptionPath::SetEndReceive(EventId endReceiveEventId)
{
    m_endReceiveEventId = endReceiveEventId;
}
 
/***********************************************************************
 *                 Implementation of gateway methods                   *
 ***********************************************************************/
 
TypeId
GatewayLoraPhy::GetTypeId()
{
    static TypeId tid =
        TypeId("ns3::GatewayLoraPhy")
            .SetParent<LoraPhy>()
            .SetGroupName("lorawan")
            .AddTraceSource(
                "NoReceptionBecauseTransmitting",
                "Trace source indicating a packet "
                "could not be correctly received because"
                "the gateway is in transmission mode",
                MakeTraceSourceAccessor(&GatewayLoraPhy::m_noReceptionBecauseTransmitting),
                "ns3::Packet::TracedCallback")
            .AddTraceSource("LostPacketBecauseNoMoreReceivers",
                            "Trace source indicating a packet "
                            "could not be correctly received because"
                            "there are no more demodulators available",
                            MakeTraceSourceAccessor(&GatewayLoraPhy::m_noMoreDemodulators),
                            "ns3::Packet::TracedCallback")
            .AddTraceSource("OccupiedReceptionPaths",
                            "Number of currently occupied reception paths",
                            MakeTraceSourceAccessor(&GatewayLoraPhy::m_occupiedReceptionPaths),
                            "ns3::TracedValueCallback::Int");
    return tid;
}
 
GatewayLoraPhy::GatewayLoraPhy()
    : m_isTransmitting(false)
{
    NS_LOG_FUNCTION_NOARGS();
}
 
GatewayLoraPhy::~GatewayLoraPhy()
{
    NS_LOG_FUNCTION_NOARGS();
}
 
// Uplink sensitivity (Source: SX1301 datasheet)
// {SF7, SF8, SF9, SF10, SF11, SF12}
const double GatewayLoraPhy::sensitivity[6] = {-130.0, -132.5, -135.0, -137.5, -140.0, -142.5};
 
void
GatewayLoraPhy::AddReceptionPath()
{
    NS_LOG_FUNCTION_NOARGS();
 
    m_receptionPaths.push_back(Create<GatewayLoraPhy::ReceptionPath>());
}
 
void
GatewayLoraPhy::ResetReceptionPaths()
{
    NS_LOG_FUNCTION(this);
 
    m_receptionPaths.clear();
}
 
void
GatewayLoraPhy::TxFinished(Ptr<const Packet> packet)
{
    m_isTransmitting = false;
}
 
bool
GatewayLoraPhy::IsTransmitting()
{
    return m_isTransmitting;
}
 
void
GatewayLoraPhy::AddFrequency(double frequencyMHz)
{
    NS_LOG_FUNCTION(this << frequencyMHz);
 
    m_frequencies.push_back(frequencyMHz);
 
    NS_ASSERT(m_frequencies.size() <= 8);
}
 
bool
GatewayLoraPhy::IsOnFrequency(double frequencyMHz)
{
    NS_LOG_FUNCTION(this << frequencyMHz);
 
    // Look into our list of frequencies
    for (auto& f : m_frequencies)
    {
        if (f == frequencyMHz)
        {
            return true;
        }
    }
    return false;
}
} // namespace lorawan
} // namespace ns3