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lorawan-mac-helper.cc
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lorawan-mac-helper.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 <[email protected]>
*/
#include "lorawan-mac-helper.h"
#include "ns3/end-device-lora-phy.h"
#include "ns3/gateway-lora-phy.h"
#include "ns3/log.h"
#include "ns3/lora-net-device.h"
#include "ns3/random-variable-stream.h"
#include "ns3/beacon-header.h"
namespace ns3
{
namespace lorawan
{
NS_LOG_COMPONENT_DEFINE("LorawanMacHelper");
LorawanMacHelper::LorawanMacHelper()
: m_region(LorawanMacHelper::EU)
{
}
Ptr<Packet> CreateBeaconPacket()
{
// Create the beacon packet
Ptr<Packet> packet = Create<Packet>();
// Create and set the LorawanMacHeader
LorawanMacHeader macHeader;
macHeader.SetMType(LorawanMacHeader::BEACON);
packet->AddHeader(macHeader);
// Create and set the beacon header
BeaconHeader beaconHeader;
Time currentTime = Simulator::Now();
beaconHeader.SetTime(currentTime.GetSeconds());
packet->AddHeader(beaconHeader);
// You can add more information to the beacon packet here if needed
return packet;
}
// void LorawanMacHelper::SendBeacon()
//{
// Ptr<Packet> beaconPacket = CreateBeaconPacket();
// Example: send the beacon packet
// Ptr<LoraNetDevice> device = GetDevice();
// device->Send(beaconPacket);
//}
void
LorawanMacHelper::Set(std::string name, const AttributeValue& v)
{
m_mac.Set(name, v);
}
void
LorawanMacHelper::SetDeviceType(enum DeviceType dt)
{
NS_LOG_FUNCTION(this << dt);
switch (dt)
{
case GW:
m_mac.SetTypeId("ns3::GatewayLorawanMac");
break;
case ED_A:
m_mac.SetTypeId("ns3::ClassAEndDeviceLorawanMac");
break;
}
m_deviceType = dt;
}
void
LorawanMacHelper::SetAddressGenerator(Ptr<LoraDeviceAddressGenerator> addrGen)
{
NS_LOG_FUNCTION(this);
m_addrGen = addrGen;
}
void
LorawanMacHelper::SetRegion(enum LorawanMacHelper::Regions region)
{
m_region = region;
}
Ptr<LorawanMac>
LorawanMacHelper::Create(Ptr<Node> node, Ptr<NetDevice> device) const
{
Ptr<LorawanMac> mac = m_mac.Create<LorawanMac>();
mac->SetDevice(device);
// If we are operating on an end device, add an address to it
if (m_deviceType == ED_A && m_addrGen)
{
mac->GetObject<ClassAEndDeviceLorawanMac>()->SetDeviceAddress(m_addrGen->NextAddress());
}
// Add a basic list of channels based on the region where the device is
// operating
if (m_deviceType == ED_A)
{
Ptr<ClassAEndDeviceLorawanMac> edMac = mac->GetObject<ClassAEndDeviceLorawanMac>();
switch (m_region)
{
case LorawanMacHelper::EU: {
ConfigureForEuRegion(edMac);
break;
}
case LorawanMacHelper::SingleChannel: {
ConfigureForSingleChannelRegion(edMac);
break;
}
case LorawanMacHelper::ALOHA: {
ConfigureForAlohaRegion(edMac);
break;
}
default: {
NS_LOG_ERROR("This region isn't supported yet!");
break;
}
}
}
else
{
Ptr<GatewayLorawanMac> gwMac = mac->GetObject<GatewayLorawanMac>();
switch (m_region)
{
case LorawanMacHelper::EU: {
ConfigureForEuRegion(gwMac);
break;
}
case LorawanMacHelper::SingleChannel: {
ConfigureForSingleChannelRegion(gwMac);
break;
}
case LorawanMacHelper::ALOHA: {
ConfigureForAlohaRegion(gwMac);
break;
}
default: {
NS_LOG_ERROR("This region isn't supported yet!");
break;
}
}
}
return mac;
}
void
LorawanMacHelper::ConfigureForAlohaRegion(Ptr<ClassAEndDeviceLorawanMac> edMac) const
{
NS_LOG_FUNCTION_NOARGS();
ApplyCommonAlohaConfigurations(edMac);
/////////////////////////////////////////////////////
// TxPower -> Transmission power in dBm conversion //
/////////////////////////////////////////////////////
edMac->SetTxDbmForTxPower(std::vector<double>{16, 14, 12, 10, 8, 6, 4, 2});
////////////////////////////////////////////////////////////
// Matrix to know which data rate the gateway will respond with //
////////////////////////////////////////////////////////////
LorawanMac::ReplyDataRateMatrix matrix = {{{{0, 0, 0, 0, 0, 0}},
{{1, 0, 0, 0, 0, 0}},
{{2, 1, 0, 0, 0, 0}},
{{3, 2, 1, 0, 0, 0}},
{{4, 3, 2, 1, 0, 0}},
{{5, 4, 3, 2, 1, 0}},
{{6, 5, 4, 3, 2, 1}},
{{7, 6, 5, 4, 3, 2}}}};
edMac->SetReplyDataRateMatrix(matrix);
/////////////////////
// Preamble length //
/////////////////////
edMac->SetNPreambleSymbols(8);
//////////////////////////////////////
// Second receive window parameters //
//////////////////////////////////////
edMac->SetSecondReceiveWindowDataRate(0);
edMac->SetSecondReceiveWindowFrequency(869.525);
}
void
LorawanMacHelper::ConfigureForAlohaRegion(Ptr<GatewayLorawanMac> gwMac) const
{
NS_LOG_FUNCTION_NOARGS();
///////////////////////////////
// ReceivePath configuration //
///////////////////////////////
Ptr<GatewayLoraPhy> gwPhy =
gwMac->GetDevice()->GetObject<LoraNetDevice>()->GetPhy()->GetObject<GatewayLoraPhy>();
ApplyCommonAlohaConfigurations(gwMac);
if (gwPhy) // If cast is successful, there's a GatewayLoraPhy
{
NS_LOG_DEBUG("Resetting reception paths");
gwPhy->ResetReceptionPaths();
int receptionPaths = 0;
int maxReceptionPaths = 1;
while (receptionPaths < maxReceptionPaths)
{
gwPhy->GetObject<GatewayLoraPhy>()->AddReceptionPath();
receptionPaths++;
}
gwPhy->AddFrequency(868.1);
}
}
void
LorawanMacHelper::ApplyCommonAlohaConfigurations(Ptr<LorawanMac> lorawanMac) const
{
NS_LOG_FUNCTION_NOARGS();
//////////////
// SubBands //
//////////////
LogicalLoraChannelHelper channelHelper;
channelHelper.AddSubBand(868, 868.6, 1, 14);
//////////////////////
// Default channels //
//////////////////////
Ptr<LogicalLoraChannel> lc1 = CreateObject<LogicalLoraChannel>(868.1, 0, 5);
channelHelper.AddChannel(lc1);
lorawanMac->SetLogicalLoraChannelHelper(channelHelper);
///////////////////////////////////////////////////////////
// Data rate -> Spreading factor, Data rate -> Bandwidth //
// and Data rate -> MaxAppPayload conversions //
///////////////////////////////////////////////////////////
lorawanMac->SetSfForDataRate(std::vector<uint8_t>{12, 11, 10, 9, 8, 7, 7});
lorawanMac->SetBandwidthForDataRate(
std::vector<double>{125000, 125000, 125000, 125000, 125000, 125000, 250000});
lorawanMac->SetMaxAppPayloadForDataRate(
std::vector<uint32_t>{59, 59, 59, 123, 230, 230, 230, 230});
}
void
LorawanMacHelper::ConfigureForEuRegion(Ptr<ClassAEndDeviceLorawanMac> edMac) const
{
NS_LOG_FUNCTION_NOARGS();
ApplyCommonEuConfigurations(edMac);
/////////////////////////////////////////////////////
// TxPower -> Transmission power in dBm conversion //
/////////////////////////////////////////////////////
edMac->SetTxDbmForTxPower(std::vector<double>{16, 14, 12, 10, 8, 6, 4, 2});
////////////////////////////////////////////////////////////
// Matrix to know which data rate the gateway will respond with //
////////////////////////////////////////////////////////////
LorawanMac::ReplyDataRateMatrix matrix = {{{{0, 0, 0, 0, 0, 0}},
{{1, 0, 0, 0, 0, 0}},
{{2, 1, 0, 0, 0, 0}},
{{3, 2, 1, 0, 0, 0}},
{{4, 3, 2, 1, 0, 0}},
{{5, 4, 3, 2, 1, 0}},
{{6, 5, 4, 3, 2, 1}},
{{7, 6, 5, 4, 3, 2}}}};
edMac->SetReplyDataRateMatrix(matrix);
/////////////////////
// Preamble length //
/////////////////////
edMac->SetNPreambleSymbols(8);
//////////////////////////////////////
// Second receive window parameters //
//////////////////////////////////////
edMac->SetSecondReceiveWindowDataRate(0);
edMac->SetSecondReceiveWindowFrequency(869.525);
}
void
LorawanMacHelper::ConfigureForEuRegion(Ptr<GatewayLorawanMac> gwMac) const
{
NS_LOG_FUNCTION_NOARGS();
///////////////////////////////
// ReceivePath configuration //
///////////////////////////////
Ptr<GatewayLoraPhy> gwPhy =
gwMac->GetDevice()->GetObject<LoraNetDevice>()->GetPhy()->GetObject<GatewayLoraPhy>();
ApplyCommonEuConfigurations(gwMac);
if (gwPhy) // If cast is successful, there's a GatewayLoraPhy
{
NS_LOG_DEBUG("Resetting reception paths");
gwPhy->ResetReceptionPaths();
std::vector<double> frequencies;
frequencies.push_back(868.1);
frequencies.push_back(868.3);
frequencies.push_back(868.5);
for (auto& f : frequencies)
{
gwPhy->AddFrequency(f);
}
int receptionPaths = 0;
int maxReceptionPaths = 8;
while (receptionPaths < maxReceptionPaths)
{
gwPhy->GetObject<GatewayLoraPhy>()->AddReceptionPath();
receptionPaths++;
}
}
}
void
LorawanMacHelper::ApplyCommonEuConfigurations(Ptr<LorawanMac> lorawanMac) const
{
NS_LOG_FUNCTION_NOARGS();
//////////////
// SubBands //
//////////////
LogicalLoraChannelHelper channelHelper;
channelHelper.AddSubBand(868, 868.6, 0.01, 14);
channelHelper.AddSubBand(868.7, 869.2, 0.001, 14);
channelHelper.AddSubBand(869.4, 869.65, 0.1, 27);
//////////////////////
// Default channels //
//////////////////////
Ptr<LogicalLoraChannel> lc1 = CreateObject<LogicalLoraChannel>(868.1, 0, 5);
Ptr<LogicalLoraChannel> lc2 = CreateObject<LogicalLoraChannel>(868.3, 0, 5);
Ptr<LogicalLoraChannel> lc3 = CreateObject<LogicalLoraChannel>(868.5, 0, 5);
channelHelper.AddChannel(lc1);
channelHelper.AddChannel(lc2);
channelHelper.AddChannel(lc3);
lorawanMac->SetLogicalLoraChannelHelper(channelHelper);
///////////////////////////////////////////////////////////
// Data rate -> Spreading factor, Data rate -> Bandwidth //
// and Data rate -> MaxAppPayload conversions //
///////////////////////////////////////////////////////////
lorawanMac->SetSfForDataRate(std::vector<uint8_t>{12, 11, 10, 9, 8, 7, 7});
lorawanMac->SetBandwidthForDataRate(
std::vector<double>{125000, 125000, 125000, 125000, 125000, 125000, 250000});
lorawanMac->SetMaxAppPayloadForDataRate(
std::vector<uint32_t>{59, 59, 59, 123, 230, 230, 230, 230});
}
///////////////////////////////
void
LorawanMacHelper::ConfigureForSingleChannelRegion(Ptr<ClassAEndDeviceLorawanMac> edMac) const
{
NS_LOG_FUNCTION_NOARGS();
ApplyCommonSingleChannelConfigurations(edMac);
/////////////////////////////////////////////////////
// TxPower -> Transmission power in dBm conversion //
/////////////////////////////////////////////////////
edMac->SetTxDbmForTxPower(std::vector<double>{16, 14, 12, 10, 8, 6, 4, 2});
////////////////////////////////////////////////////////////
// Matrix to know which DataRate the gateway will respond with //
////////////////////////////////////////////////////////////
LorawanMac::ReplyDataRateMatrix matrix = {{{{0, 0, 0, 0, 0, 0}},
{{1, 0, 0, 0, 0, 0}},
{{2, 1, 0, 0, 0, 0}},
{{3, 2, 1, 0, 0, 0}},
{{4, 3, 2, 1, 0, 0}},
{{5, 4, 3, 2, 1, 0}},
{{6, 5, 4, 3, 2, 1}},
{{7, 6, 5, 4, 3, 2}}}};
edMac->SetReplyDataRateMatrix(matrix);
/////////////////////
// Preamble length //
/////////////////////
edMac->SetNPreambleSymbols(8);
//////////////////////////////////////
// Second receive window parameters //
//////////////////////////////////////
edMac->SetSecondReceiveWindowDataRate(0);
edMac->SetSecondReceiveWindowFrequency(869.525);
}
void
LorawanMacHelper::ConfigureForSingleChannelRegion(Ptr<GatewayLorawanMac> gwMac) const
{
NS_LOG_FUNCTION_NOARGS();
///////////////////////////////
// ReceivePath configuration //
///////////////////////////////
Ptr<GatewayLoraPhy> gwPhy =
gwMac->GetDevice()->GetObject<LoraNetDevice>()->GetPhy()->GetObject<GatewayLoraPhy>();
ApplyCommonEuConfigurations(gwMac);
if (gwPhy) // If cast is successful, there's a GatewayLoraPhy
{
NS_LOG_DEBUG("Resetting reception paths");
gwPhy->ResetReceptionPaths();
std::vector<double> frequencies;
frequencies.push_back(868.1);
for (auto& f : frequencies)
{
gwPhy->AddFrequency(f);
}
int receptionPaths = 0;
int maxReceptionPaths = 8;
while (receptionPaths < maxReceptionPaths)
{
gwPhy->GetObject<GatewayLoraPhy>()->AddReceptionPath();
receptionPaths++;
}
}
}
void
LorawanMacHelper::ApplyCommonSingleChannelConfigurations(Ptr<LorawanMac> lorawanMac) const
{
NS_LOG_FUNCTION_NOARGS();
//////////////
// SubBands //
//////////////
LogicalLoraChannelHelper channelHelper;
channelHelper.AddSubBand(868, 868.6, 0.01, 14);
channelHelper.AddSubBand(868.7, 869.2, 0.001, 14);
channelHelper.AddSubBand(869.4, 869.65, 0.1, 27);
//////////////////////
// Default channels //
//////////////////////
Ptr<LogicalLoraChannel> lc1 = CreateObject<LogicalLoraChannel>(868.1, 0, 5);
channelHelper.AddChannel(lc1);
lorawanMac->SetLogicalLoraChannelHelper(channelHelper);
///////////////////////////////////////////////////////////
// Data rate -> Spreading factor, Data rate -> Bandwidth //
// and Data rate -> MaxAppPayload conversions //
///////////////////////////////////////////////////////////
lorawanMac->SetSfForDataRate(std::vector<uint8_t>{12, 11, 10, 9, 8, 7, 7});
lorawanMac->SetBandwidthForDataRate(
std::vector<double>{125000, 125000, 125000, 125000, 125000, 125000, 250000});
lorawanMac->SetMaxAppPayloadForDataRate(
std::vector<uint32_t>{59, 59, 59, 123, 230, 230, 230, 230});
}
std::vector<int>
LorawanMacHelper::SetSpreadingFactorsUp(NodeContainer endDevices,
NodeContainer gateways,
Ptr<LoraChannel> channel)
{
NS_LOG_FUNCTION_NOARGS();
std::vector<int> sfQuantity(7, 0);
for (auto j = endDevices.Begin(); j != endDevices.End(); ++j)
{
Ptr<Node> object = *j;
Ptr<MobilityModel> position = object->GetObject<MobilityModel>();
NS_ASSERT(position);
Ptr<NetDevice> netDevice = object->GetDevice(0);
Ptr<LoraNetDevice> loraNetDevice = netDevice->GetObject<LoraNetDevice>();
NS_ASSERT(loraNetDevice);
Ptr<ClassAEndDeviceLorawanMac> mac =
loraNetDevice->GetMac()->GetObject<ClassAEndDeviceLorawanMac>();
NS_ASSERT(mac);
// Try computing the distance from each gateway and find the best one
Ptr<Node> bestGateway = gateways.Get(0);
Ptr<MobilityModel> bestGatewayPosition = bestGateway->GetObject<MobilityModel>();
// Assume devices transmit at 14 dBm
double highestRxPower = channel->GetRxPower(14, position, bestGatewayPosition);
for (auto currentGw = gateways.Begin() + 1; currentGw != gateways.End(); ++currentGw)
{
// Compute the power received from the current gateway
Ptr<Node> curr = *currentGw;
Ptr<MobilityModel> currPosition = curr->GetObject<MobilityModel>();
double currentRxPower = channel->GetRxPower(14, position, currPosition); // dBm
if (currentRxPower > highestRxPower)
{
bestGateway = curr;
bestGatewayPosition = curr->GetObject<MobilityModel>();
highestRxPower = currentRxPower;
}
}
// NS_LOG_DEBUG ("Rx Power: " << highestRxPower);
double rxPower = highestRxPower;
// Get the end device sensitivity
Ptr<EndDeviceLoraPhy> edPhy = loraNetDevice->GetPhy()->GetObject<EndDeviceLoraPhy>();
const double* edSensitivity = edPhy->sensitivity;
if (rxPower > *edSensitivity)
{
mac->SetDataRate(5);
sfQuantity[0] = sfQuantity[0] + 1;
}
else if (rxPower > *(edSensitivity + 1))
{
mac->SetDataRate(4);
sfQuantity[1] = sfQuantity[1] + 1;
}
else if (rxPower > *(edSensitivity + 2))
{
mac->SetDataRate(3);
sfQuantity[2] = sfQuantity[2] + 1;
}
else if (rxPower > *(edSensitivity + 3))
{
mac->SetDataRate(2);
sfQuantity[3] = sfQuantity[3] + 1;
}
else if (rxPower > *(edSensitivity + 4))
{
mac->SetDataRate(1);
sfQuantity[4] = sfQuantity[4] + 1;
}
else if (rxPower > *(edSensitivity + 5))
{
mac->SetDataRate(0);
sfQuantity[5] = sfQuantity[5] + 1;
}
else // Device is out of range. Assign SF12.
{
// NS_LOG_DEBUG ("Device out of range");
mac->SetDataRate(0);
sfQuantity[6] = sfQuantity[6] + 1;
// NS_LOG_DEBUG ("sfQuantity[6] = " << sfQuantity[6]);
}
/*
// Get the Gw sensitivity
Ptr<NetDevice> gatewayNetDevice = bestGateway->GetDevice (0);
Ptr<LoraNetDevice> gatewayLoraNetDevice = gatewayNetDevice->GetObject<LoraNetDevice> ();
Ptr<GatewayLoraPhy> gatewayPhy = gatewayLoraNetDevice->GetPhy ()->GetObject<GatewayLoraPhy>
(); const double *gwSensitivity = gatewayPhy->sensitivity;
if(rxPower > *gwSensitivity)
{
mac->SetDataRate (5);
sfQuantity[0] = sfQuantity[0] + 1;
}
else if (rxPower > *(gwSensitivity+1))
{
mac->SetDataRate (4);
sfQuantity[1] = sfQuantity[1] + 1;
}
else if (rxPower > *(gwSensitivity+2))
{
mac->SetDataRate (3);
sfQuantity[2] = sfQuantity[2] + 1;
}
else if (rxPower > *(gwSensitivity+3))
{
mac->SetDataRate (2);
sfQuantity[3] = sfQuantity[3] + 1;
}
else if (rxPower > *(gwSensitivity+4))
{
mac->SetDataRate (1);
sfQuantity[4] = sfQuantity[4] + 1;
}
else if (rxPower > *(gwSensitivity+5))
{
mac->SetDataRate (0);
sfQuantity[5] = sfQuantity[5] + 1;
}
else // Device is out of range. Assign SF12.
{
mac->SetDataRate (0);
sfQuantity[6] = sfQuantity[6] + 1;
}
*/
} // end loop on nodes
return sfQuantity;
} // end function
std::vector<int>
LorawanMacHelper::SetSpreadingFactorsGivenDistribution(NodeContainer endDevices,
NodeContainer gateways,
std::vector<double> distribution)
{
NS_LOG_FUNCTION_NOARGS();
NS_ASSERT(distribution.size() == 6);
std::vector<int> sfQuantity(7, 0);
Ptr<UniformRandomVariable> uniformRV = CreateObject<UniformRandomVariable>();
std::vector<double> cumdistr(6);
cumdistr[0] = distribution[0];
for (int i = 1; i < 6; ++i)
{
cumdistr[i] = distribution[i] + cumdistr[i - 1];
}
NS_LOG_DEBUG("Distribution: " << distribution[0] << " " << distribution[1] << " "
<< distribution[2] << " " << distribution[3] << " "
<< distribution[4] << " " << distribution[5]);
NS_LOG_DEBUG("Cumulative distribution: " << cumdistr[0] << " " << cumdistr[1] << " "
<< cumdistr[2] << " " << cumdistr[3] << " "
<< cumdistr[4] << " " << cumdistr[5]);
for (auto j = endDevices.Begin(); j != endDevices.End(); ++j)
{
Ptr<Node> object = *j;
Ptr<MobilityModel> position = object->GetObject<MobilityModel>();
NS_ASSERT(position);
Ptr<NetDevice> netDevice = object->GetDevice(0);
Ptr<LoraNetDevice> loraNetDevice = netDevice->GetObject<LoraNetDevice>();
NS_ASSERT(loraNetDevice);
Ptr<ClassAEndDeviceLorawanMac> mac =
loraNetDevice->GetMac()->GetObject<ClassAEndDeviceLorawanMac>();
NS_ASSERT(mac);
double prob = uniformRV->GetValue(0, 1);
// NS_LOG_DEBUG ("Probability: " << prob);
if (prob < cumdistr[0])
{
mac->SetDataRate(5);
sfQuantity[0] = sfQuantity[0] + 1;
}
else if (prob > cumdistr[0] && prob < cumdistr[1])
{
mac->SetDataRate(4);
sfQuantity[1] = sfQuantity[1] + 1;
}
else if (prob > cumdistr[1] && prob < cumdistr[2])
{
mac->SetDataRate(3);
sfQuantity[2] = sfQuantity[2] + 1;
}
else if (prob > cumdistr[2] && prob < cumdistr[3])
{
mac->SetDataRate(2);
sfQuantity[3] = sfQuantity[3] + 1;
}
else if (prob > cumdistr[3] && prob < cumdistr[4])
{
mac->SetDataRate(1);
sfQuantity[4] = sfQuantity[4] + 1;
}
else
{
mac->SetDataRate(0);
sfQuantity[5] = sfQuantity[5] + 1;
}
} // end loop on nodes
return sfQuantity;
} // end function
} // namespace lorawan
} // namespace ns3