Diff: LoRaMacClassB.cpp

Branch:

class_b

Revision:

38:182ba91524e4

Child:

40:f7ce84dc9363

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LoRaMacClassB.cpp	Wed Aug 09 16:20:21 2017 -0400
@@ -0,0 +1,1345 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+    (C)2013 Semtech
+ ___ _____ _   ___ _  _____ ___  ___  ___ ___
+/ __|_   _/_\ / __| |/ / __/ _ \| _ \/ __| __|
+\__ \ | |/ _ \ (__| ' <| _| (_) |   / (__| _|
+|___/ |_/_/ \_\___|_|\_\_| \___/|_|_\\___|___|
+embedded.connectivity.solutions===============
+
+Description: LoRa MAC Class B layer implementation
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainer: Miguel Luis ( Semtech ), Gregory Cristian ( Semtech ) and Daniel Jaeckle ( STACKFORCE )
+*/
+#include "board.h"
+#include "LoRaMac.h"
+#include "region/Region.h"
+#include "LoRaMacClassB.h"
+#include "LoRaMacCrypto.h"
+
+#ifdef LORAMAC_CLASSB_ENABLED
+/*!
+ * State of the beaconing mechanism
+ */
+static BeaconState_t BeaconState;
+
+/*!
+ * State of the ping slot mechanism
+ */
+static PingSlotState_t PingSlotState;
+
+/*!
+ * State of the multicast slot mechanism
+ */
+static PingSlotState_t MulticastSlotState;
+
+/*!
+ * Class B ping slot context
+ */
+static PingSlotContext_t PingSlotCtx;
+
+/*!
+ * Class B beacon context
+ */
+static BeaconContext_t BeaconCtx;
+
+/*!
+ * Timer for CLASS B beacon acquisition and tracking.
+ */
+static TimerEvent_t BeaconTimer;
+
+/*!
+ * Timer for CLASS B ping slot timer.
+ */
+static TimerEvent_t PingSlotTimer;
+
+/*!
+ * Timer for CLASS B multicast ping slot timer.
+ */
+static TimerEvent_t MulticastSlotTimer;
+
+/*!
+ * Container for the callbacks related to class b.
+ */
+static LoRaMacClassBCallback_t LoRaMacClassBCallbacks;
+
+/*!
+ * Data structure which holds the parameters which needs to be set
+ * in class b operation.
+ */
+static LoRaMacClassBParams_t LoRaMacClassBParams;
+
+
+/*!
+ * \brief Calculates the next ping slot time.
+ *
+ * \param [IN] slotOffset The ping slot offset
+ * \param [IN] pingPeriod The ping period
+ * \param [OUT] timeOffset Time offset of the next slot, based on current time
+ *
+ * \retval [true: ping slot found, false: no ping slot found]
+ */
+static bool CalcNextSlotTime( uint16_t slotOffset, uint16_t pingPeriod, TimerTime_t* timeOffset )
+{
+    uint8_t currentPingSlot = 0;
+    TimerTime_t slotTime = 0;
+    TimerTime_t currentTime = TimerGetCurrentTime( );
+
+    // Calculate the point in time of the last beacon even if we missed it
+    slotTime = ( ( currentTime - BeaconCtx.LastBeaconRx ) % BeaconCtx.Cfg.Interval );
+    slotTime = currentTime - slotTime;
+
+    // Add the reserved time and the ping offset
+    slotTime += BeaconCtx.Cfg.Reserved;
+    slotTime += slotOffset * PingSlotCtx.Cfg.PingSlotWindow;
+
+    if( slotTime < currentTime )
+    {
+        currentPingSlot = ( ( currentTime - slotTime ) /
+                          ( pingPeriod * PingSlotCtx.Cfg.PingSlotWindow ) ) + 1;
+        slotTime += ( ( TimerTime_t )( currentPingSlot * pingPeriod ) *
+                    PingSlotCtx.Cfg.PingSlotWindow );
+    }
+
+    if( currentPingSlot < PingSlotCtx.PingNb )
+    {
+        if( slotTime <= ( BeaconCtx.NextBeaconRx - BeaconCtx.Cfg.Guard - PingSlotCtx.Cfg.PingSlotWindow ) )
+        {
+            // Calculate the relative ping slot time
+            slotTime -= currentTime;
+            slotTime -= RADIO_WAKEUP_TIME;
+            slotTime = TimerTempCompensation( slotTime, BeaconCtx.Temperature );
+            *timeOffset = slotTime;
+            return true;
+        }
+    }
+    return false;
+}
+
+/*!
+ * \brief Calculates CRC's of the beacon frame
+ *
+ * \param [IN] buffer Pointer to the data
+ * \param [IN] length Length of the data
+ *
+ * \retval CRC
+ */
+static uint16_t BeaconCrc( uint8_t *buffer, uint16_t length )
+{
+    // The CRC calculation follows CCITT
+    const uint16_t polynom = 0x1021;
+    // CRC initial value
+    uint16_t crc = 0x0000;
+
+    if( buffer == NULL )
+    {
+        return 0;
+    }
+
+    for( uint16_t i = 0; i < length; ++i )
+    {
+        crc ^= ( uint16_t ) buffer[i] << 8;
+        for( uint16_t j = 0; j < 8; ++j )
+        {
+            crc = ( crc & 0x8000 ) ? ( crc << 1 ) ^ polynom : ( crc << 1 );
+        }
+    }
+
+    return crc;
+}
+
+static void GetTemperatureLevel( LoRaMacClassBCallback_t *callbacks, BeaconContext_t *beaconCtx )
+{
+    // Measure temperature, if available
+    if( ( callbacks != NULL ) && ( callbacks->GetTemperatureLevel != NULL ) )
+    {
+        beaconCtx->Temperature = callbacks->GetTemperatureLevel( );
+    }
+}
+
+#endif // LORAMAC_CLASSB_ENABLED
+
+void LoRaMacClassBInit( LoRaMacClassBParams_t *classBParams, LoRaMacClassBCallback_t *callbacks )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    GetPhyParams_t getPhy;
+    PhyParam_t phyParam;
+
+    // Init variables to default
+    memset1( ( uint8_t* ) &BeaconCtx, 0, sizeof( BeaconContext_t ) );
+    memset1( ( uint8_t* ) &PingSlotCtx, 0, sizeof( PingSlotCtx ) );
+
+    // Store callbacks
+    LoRaMacClassBCallbacks = *callbacks;
+
+    // Store parameter pointers
+    LoRaMacClassBParams = *classBParams;
+
+    // Setup default temperature
+    BeaconCtx.Temperature = 25.0;
+    GetTemperatureLevel( &LoRaMacClassBCallbacks, &BeaconCtx );
+
+    // Initialize timers
+    TimerInit( &BeaconTimer, LoRaMacClassBBeaconTimerEvent );
+    TimerInit( &PingSlotTimer, LoRaMacClassBPingSlotTimerEvent );
+    TimerInit( &MulticastSlotTimer, LoRaMacClassBMulticastSlotTimerEvent );
+
+    // Setup default states
+    BeaconState = BEACON_STATE_ACQUISITION;
+    PingSlotState = PINGSLOT_STATE_SET_TIMER;
+    MulticastSlotState = PINGSLOT_STATE_SET_TIMER;
+
+    // Get phy parameters
+    getPhy.Attribute = PHY_BEACON_INTERVAL;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.Interval = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_RESERVED;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.Reserved = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_GUARD;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.Guard = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_WINDOW;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.Window = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_WINDOW_SLOTS;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.WindowSlots = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_SYMBOL_TO_DEFAULT;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.SymbolToDefault = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_SYMBOL_TO_EXPANSION_MAX;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.SymbolToExpansionMax = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_SYMBOL_TO_EXPANSION_FACTOR;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.SymbolToExpansionFactor = phyParam.Value;
+
+    getPhy.Attribute = PHY_MAX_BEACON_LESS_PERIOD;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.MaxBeaconLessPeriod = phyParam.Value;
+
+    getPhy.Attribute = PHY_BEACON_DELAY_BEACON_TIMING_ANS;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    BeaconCtx.Cfg.DelayBeaconTimingAns = phyParam.Value;
+
+    getPhy.Attribute = PHY_PING_SLOT_WINDOW;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    PingSlotCtx.Cfg.PingSlotWindow = phyParam.Value;
+
+    getPhy.Attribute = PHY_PING_SLOT_SYMBOL_TO_EXPANSION_MAX;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    PingSlotCtx.Cfg.SymbolToExpansionMax = phyParam.Value;
+
+    getPhy.Attribute = PHY_PING_SLOT_SYMBOL_TO_EXPANSION_FACTOR;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+    PingSlotCtx.Cfg.SymbolToExpansionFactor = phyParam.Value;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBSetBeaconState( BeaconState_t beaconState )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    BeaconState = beaconState;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBSetPingSlotState( PingSlotState_t pingSlotState )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    PingSlotState = pingSlotState;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBBeaconTimerEvent( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    RxBeaconSetup_t rxBeaconSetup;
+    bool beaconChannelSet = false;
+    uint8_t index = 0;
+    bool activateTimer = false;
+    TimerTime_t beaconEventTime = 1;
+    TimerTime_t currentTime = TimerGetCurrentTime( );
+
+    TimerStop( &BeaconTimer );
+
+    // Beacon state machine
+    switch( BeaconState )
+    {
+        case BEACON_STATE_ACQUISITION:
+        {
+            activateTimer = true;
+
+            if( BeaconCtx.Ctrl.AcquisitionPending == 1 )
+            {
+                Radio.Sleep();
+                BeaconState = BEACON_STATE_SWITCH_CLASS;
+            }
+            else
+            {
+                // Default symbol timeouts
+                BeaconCtx.SymbolTimeout = BeaconCtx.Cfg.SymbolToDefault;
+                PingSlotCtx.SymbolTimeout = BeaconCtx.Cfg.SymbolToDefault;
+
+                if( BeaconCtx.Ctrl.BeaconDelaySet == 1 )
+                {
+                    if( BeaconCtx.BeaconTimingDelay > 0 )
+                    {
+                        if( BeaconCtx.NextBeaconRx > currentTime )
+                        {
+                            BeaconCtx.Ctrl.AcquisitionTimerSet = 1;
+                            beaconEventTime = TimerTempCompensation( BeaconCtx.NextBeaconRx - currentTime, BeaconCtx.Temperature );
+                        }
+                        else
+                        {
+                            BeaconCtx.Ctrl.BeaconDelaySet = 0;
+                            BeaconCtx.Ctrl.AcquisitionPending = 1;
+                            BeaconCtx.Ctrl.AcquisitionTimerSet = 0;
+                            beaconEventTime = BeaconCtx.Cfg.Interval;
+
+                            rxBeaconSetup.SymbolTimeout = BeaconCtx.SymbolTimeout;
+                            rxBeaconSetup.RxTime = 0;
+                            rxBeaconSetup.DeviceAddress = *LoRaMacClassBParams.LoRaMacDevAddr;
+                            rxBeaconSetup.BeaconTimingChannel = BeaconCtx.BeaconTimingChannel;
+                            rxBeaconSetup.CustomFrequencyEnabled = BeaconCtx.Ctrl.CustomFreq;
+                            rxBeaconSetup.BeaconChannelSet = BeaconCtx.Ctrl.BeaconChannelSet;
+                            rxBeaconSetup.CustomFrequency = BeaconCtx.Frequency;
+                            rxBeaconSetup.BeaconTime = BeaconCtx.BeaconTime;
+                            rxBeaconSetup.BeaconInterval = BeaconCtx.Cfg.Interval;
+
+                            RegionRxBeaconSetup( *LoRaMacClassBParams.LoRaMacRegion, &rxBeaconSetup, &LoRaMacClassBParams.McpsIndication->RxDatarate, &beaconChannelSet );
+                            BeaconCtx.Ctrl.BeaconChannelSet = beaconChannelSet;
+                        }
+                        BeaconCtx.NextBeaconRx = 0;
+                        BeaconCtx.BeaconTimingDelay = 0;
+                    }
+                    else
+                    {
+                        BeaconCtx.Ctrl.BeaconDelaySet = 0;
+                        BeaconCtx.Ctrl.AcquisitionPending = 0;
+                        BeaconCtx.Ctrl.AcquisitionTimerSet = 1;
+                        beaconEventTime = BeaconCtx.Cfg.DelayBeaconTimingAns;
+
+                        rxBeaconSetup.SymbolTimeout = BeaconCtx.SymbolTimeout;
+                        rxBeaconSetup.RxTime = 0;
+                        rxBeaconSetup.DeviceAddress = *LoRaMacClassBParams.LoRaMacDevAddr;
+                        rxBeaconSetup.BeaconTimingChannel = BeaconCtx.BeaconTimingChannel;
+                        rxBeaconSetup.CustomFrequencyEnabled = BeaconCtx.Ctrl.CustomFreq;
+                        rxBeaconSetup.BeaconChannelSet = BeaconCtx.Ctrl.BeaconChannelSet;
+                        rxBeaconSetup.CustomFrequency = BeaconCtx.Frequency;
+                        rxBeaconSetup.BeaconTime = BeaconCtx.BeaconTime;
+                        rxBeaconSetup.BeaconInterval = BeaconCtx.Cfg.Interval;
+
+                        RegionRxBeaconSetup( *LoRaMacClassBParams.LoRaMacRegion, &rxBeaconSetup, &LoRaMacClassBParams.McpsIndication->RxDatarate, &beaconChannelSet );
+                        BeaconCtx.Ctrl.BeaconChannelSet = beaconChannelSet;
+                    }
+                }
+                else
+                {
+                    BeaconCtx.Ctrl.AcquisitionPending = 1;
+                    beaconEventTime = BeaconCtx.Cfg.Interval;
+                    if( BeaconCtx.Ctrl.AcquisitionTimerSet == 0 )
+                    {
+                        rxBeaconSetup.SymbolTimeout = BeaconCtx.SymbolTimeout;
+                        rxBeaconSetup.RxTime = 0;
+                        rxBeaconSetup.DeviceAddress = *LoRaMacClassBParams.LoRaMacDevAddr;
+                        rxBeaconSetup.BeaconTimingChannel = BeaconCtx.BeaconTimingChannel;
+                        rxBeaconSetup.CustomFrequencyEnabled = BeaconCtx.Ctrl.CustomFreq;
+                        rxBeaconSetup.BeaconChannelSet = BeaconCtx.Ctrl.BeaconChannelSet;
+                        rxBeaconSetup.CustomFrequency = BeaconCtx.Frequency;
+                        rxBeaconSetup.BeaconTime = BeaconCtx.BeaconTime;
+                        rxBeaconSetup.BeaconInterval = BeaconCtx.Cfg.Interval;
+
+                        RegionRxBeaconSetup( *LoRaMacClassBParams.LoRaMacRegion, &rxBeaconSetup, &LoRaMacClassBParams.McpsIndication->RxDatarate, &beaconChannelSet );
+                        BeaconCtx.Ctrl.BeaconChannelSet = beaconChannelSet;
+                    }
+                    BeaconCtx.Ctrl.AcquisitionTimerSet = 0;
+                }
+            }
+            break;
+        }
+        case BEACON_STATE_TIMEOUT:
+        {
+            // Store listen time
+            BeaconCtx.ListenTime = currentTime - BeaconCtx.NextBeaconRx;
+            // Setup next state
+            BeaconState = BEACON_STATE_BEACON_MISSED;
+            // no break here
+        }
+        case BEACON_STATE_BEACON_MISSED:
+        {
+            // We have to update the beacon time, since we missed a beacon
+            BeaconCtx.BeaconTime += ( BeaconCtx.Cfg.Interval / 1000 );
+
+            // Update symbol timeout
+            BeaconCtx.SymbolTimeout *= BeaconCtx.Cfg.SymbolToExpansionFactor;
+            if( BeaconCtx.SymbolTimeout > BeaconCtx.Cfg.SymbolToExpansionMax )
+            {
+                BeaconCtx.SymbolTimeout = BeaconCtx.Cfg.SymbolToExpansionMax;
+            }
+            PingSlotCtx.SymbolTimeout *= PingSlotCtx.Cfg.SymbolToExpansionFactor;
+            if( PingSlotCtx.SymbolTimeout > PingSlotCtx.Cfg.SymbolToExpansionMax )
+            {
+                PingSlotCtx.SymbolTimeout = PingSlotCtx.Cfg.SymbolToExpansionMax;
+            }
+            // Setup next state
+            BeaconState = BEACON_STATE_REACQUISITION;
+            // no break here
+        }
+        case BEACON_STATE_REACQUISITION:
+        {
+            if( ( currentTime - BeaconCtx.LastBeaconRx ) > BeaconCtx.Cfg.MaxBeaconLessPeriod )
+            {
+                activateTimer = true;
+                BeaconState = BEACON_STATE_SWITCH_CLASS;
+            }
+            else
+            {
+                activateTimer = true;
+                // Calculate the point in time of the next beacon
+                beaconEventTime = ( ( currentTime - BeaconCtx.LastBeaconRx ) % BeaconCtx.Cfg.Interval );
+                beaconEventTime = BeaconCtx.Cfg.Interval - beaconEventTime;
+                // Take window enlargement into account
+                beaconEventTime -= ( ( BeaconCtx.ListenTime * BeaconCtx.Cfg.SymbolToExpansionFactor ) >> 1 );
+                beaconEventTime = TimerTempCompensation( beaconEventTime, BeaconCtx.Temperature );
+                BeaconCtx.NextBeaconRx = currentTime + beaconEventTime;
+
+                // Make sure to transit to the correct state
+                if( ( currentTime + BeaconCtx.Cfg.Guard ) < BeaconCtx.NextBeaconRx )
+                {
+                    beaconEventTime -= BeaconCtx.Cfg.Guard;
+                    BeaconState = BEACON_STATE_IDLE;
+                }
+                else
+                {
+                    BeaconState = BEACON_STATE_GUARD;
+                }
+
+                if( PingSlotCtx.Ctrl.Assigned == 1 )
+                {
+                    PingSlotState = PINGSLOT_STATE_CALC_PING_OFFSET;
+                    TimerSetValue( &PingSlotTimer, 1 );
+                    TimerStart( &PingSlotTimer );
+
+                    MulticastSlotState = PINGSLOT_STATE_CALC_PING_OFFSET;
+                    TimerSetValue( &MulticastSlotTimer, 1 );
+                    TimerStart( &MulticastSlotTimer );
+                }
+            }
+            BeaconCtx.Ctrl.BeaconAcquired = 0;
+
+            if( BeaconCtx.Ctrl.ResumeBeaconing == 0 )
+            {
+                LoRaMacClassBParams.MlmeIndication->MlmeIndication = MLME_BEACON;
+                LoRaMacClassBParams.MlmeIndication->Status = LORAMAC_EVENT_INFO_STATUS_BEACON_LOST;
+                LoRaMacClassBParams.LoRaMacFlags->Bits.MlmeInd = 1;
+
+                TimerSetValue( LoRaMacClassBParams.MacStateCheckTimer, 1 );
+                TimerStart( LoRaMacClassBParams.MacStateCheckTimer );
+                LoRaMacClassBParams.LoRaMacFlags->Bits.MacDone = 1;
+            }
+            BeaconCtx.Ctrl.ResumeBeaconing = 0;
+            break;
+        }
+        case BEACON_STATE_LOCKED:
+        {
+            activateTimer = true;
+            // Calculate the point in time of the next beacon
+            beaconEventTime = ( ( currentTime - BeaconCtx.LastBeaconRx ) % BeaconCtx.Cfg.Interval );
+            beaconEventTime = BeaconCtx.Cfg.Interval - beaconEventTime;
+            beaconEventTime = TimerTempCompensation( beaconEventTime, BeaconCtx.Temperature );
+            BeaconCtx.NextBeaconRx = currentTime + beaconEventTime;
+
+            // Make sure to transit to the correct state
+            if( ( currentTime + BeaconCtx.Cfg.Guard ) < BeaconCtx.NextBeaconRx )
+            {
+                beaconEventTime -= BeaconCtx.Cfg.Guard;
+                BeaconState = BEACON_STATE_IDLE;
+            }
+            else
+            {
+                BeaconState = BEACON_STATE_GUARD;
+            }
+
+            if( LoRaMacClassBParams.LoRaMacFlags->Bits.MlmeReq == 1 )
+            {
+                // index = GetMlmeConfirmIndex( MlmeConfirmQueue, MLME_BEACON_ACQUISITION, MlmeConfirmQueueCnt );
+                index = LoRaMacClassBCallbacks.GetMlmeConfrimIndex( LoRaMacClassBParams.MlmeConfirmQueue, MLME_BEACON_ACQUISITION );
+                if( index < LORA_MAC_MLME_CONFIRM_QUEUE_LEN )
+                {
+                    LoRaMacClassBParams.MlmeConfirmQueue[index].Status = LORAMAC_EVENT_INFO_STATUS_OK;
+                    LoRaMacClassBParams.MlmeConfirm->TxTimeOnAir = 0;
+                }
+            }
+
+            if( PingSlotCtx.Ctrl.Assigned == 1 )
+            {
+                PingSlotState = PINGSLOT_STATE_CALC_PING_OFFSET;
+                TimerSetValue( &PingSlotTimer, 1 );
+                TimerStart( &PingSlotTimer );
+
+                MulticastSlotState = PINGSLOT_STATE_CALC_PING_OFFSET;
+                TimerSetValue( &MulticastSlotTimer, 1 );
+                TimerStart( &MulticastSlotTimer );
+            }
+            BeaconCtx.Ctrl.AcquisitionPending = 0;
+
+            if( BeaconCtx.Ctrl.ResumeBeaconing == 0 )
+            {
+                LoRaMacClassBParams.MlmeIndication->MlmeIndication = MLME_BEACON;
+                LoRaMacClassBParams.MlmeIndication->Status = LORAMAC_EVENT_INFO_STATUS_BEACON_LOCKED;
+                LoRaMacClassBParams.LoRaMacFlags->Bits.MlmeInd = 1;
+
+                TimerSetValue( LoRaMacClassBParams.MacStateCheckTimer, 1 );
+                TimerStart( LoRaMacClassBParams.MacStateCheckTimer );
+                LoRaMacClassBParams.LoRaMacFlags->Bits.MacDone = 1;
+            }
+            BeaconCtx.Ctrl.ResumeBeaconing = 0;
+            break;
+        }
+        case BEACON_STATE_IDLE:
+        {
+            activateTimer = true;
+            GetTemperatureLevel( &LoRaMacClassBCallbacks, &BeaconCtx );
+            beaconEventTime = BeaconCtx.NextBeaconRx - RADIO_WAKEUP_TIME;
+            currentTime = TimerGetCurrentTime( );
+
+            if( beaconEventTime > currentTime )
+            {
+                BeaconState = BEACON_STATE_GUARD;
+                beaconEventTime -= currentTime;
+                beaconEventTime = TimerTempCompensation( beaconEventTime, BeaconCtx.Temperature );
+            }
+            else
+            {
+                BeaconState = BEACON_STATE_REACQUISITION;
+                beaconEventTime = 1;
+            }
+            break;
+        }
+        case BEACON_STATE_GUARD:
+        {
+            BeaconState = BEACON_STATE_RX;
+
+            rxBeaconSetup.SymbolTimeout = BeaconCtx.SymbolTimeout;
+            rxBeaconSetup.RxTime = BeaconCtx.Cfg.Reserved;
+            rxBeaconSetup.DeviceAddress = *LoRaMacClassBParams.LoRaMacDevAddr;
+            rxBeaconSetup.BeaconTimingChannel = BeaconCtx.BeaconTimingChannel;
+            rxBeaconSetup.CustomFrequencyEnabled = BeaconCtx.Ctrl.CustomFreq;
+            rxBeaconSetup.BeaconChannelSet = BeaconCtx.Ctrl.BeaconChannelSet;
+            rxBeaconSetup.CustomFrequency = BeaconCtx.Frequency;
+            rxBeaconSetup.BeaconTime = BeaconCtx.BeaconTime;
+            rxBeaconSetup.BeaconInterval = BeaconCtx.Cfg.Interval;
+
+            RegionRxBeaconSetup( *LoRaMacClassBParams.LoRaMacRegion, &rxBeaconSetup, &LoRaMacClassBParams.McpsIndication->RxDatarate, &beaconChannelSet );
+            BeaconCtx.Ctrl.BeaconChannelSet = beaconChannelSet;
+            break;
+        }
+        case BEACON_STATE_SWITCH_CLASS:
+        {
+            if( LoRaMacClassBParams.LoRaMacFlags->Bits.MlmeReq == 1 )
+            {
+                // index = GetMlmeConfirmIndex( MlmeConfirmQueue, MLME_BEACON_ACQUISITION, MlmeConfirmQueueCnt );
+                index = LoRaMacClassBCallbacks.GetMlmeConfrimIndex( LoRaMacClassBParams.MlmeConfirmQueue, MLME_BEACON_ACQUISITION );
+                if( index < LORA_MAC_MLME_CONFIRM_QUEUE_LEN )
+                {
+                    LoRaMacClassBParams.MlmeConfirmQueue[index].Status = LORAMAC_EVENT_INFO_STATUS_BEACON_NOT_FOUND;
+                }
+            }
+            else
+            {
+                LoRaMacClassBParams.MlmeIndication->MlmeIndication = MLME_SWITCH_CLASS;
+                LoRaMacClassBParams.MlmeIndication->Status = LORAMAC_EVENT_INFO_STATUS_OK;
+                PingSlotCtx.Ctrl.Assigned = 0;
+                LoRaMacClassBParams.LoRaMacFlags->Bits.MlmeInd = 1;
+            }
+            BeaconState = BEACON_STATE_ACQUISITION;
+
+            BeaconCtx.Ctrl.BeaconMode = 0;
+            BeaconCtx.Ctrl.AcquisitionPending = 0;
+            BeaconCtx.Ctrl.AcquisitionTimerSet = 0;
+            LoRaMacClassBParams.LoRaMacFlags->Bits.MacDone = 1;
+
+            TimerSetValue( LoRaMacClassBParams.MacStateCheckTimer, beaconEventTime );
+            TimerStart( LoRaMacClassBParams.MacStateCheckTimer );
+            break;
+        }
+        default:
+        {
+            BeaconState = BEACON_STATE_ACQUISITION;
+            break;
+        }
+    }
+
+    if( activateTimer == true )
+    {
+        TimerSetValue( &BeaconTimer, beaconEventTime );
+        TimerStart( &BeaconTimer );
+    }
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBPingSlotTimerEvent( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    GetPhyParams_t getPhy;
+    PhyParam_t phyParam;
+    RxConfigParams_t pingSlotRxConfig;
+    TimerTime_t pingSlotTime = 0;
+
+    TimerStop( &PingSlotTimer );
+
+    switch( PingSlotState )
+    {
+        case PINGSLOT_STATE_CALC_PING_OFFSET:
+        {
+            LoRaMacBeaconComputePingOffset( BeaconCtx.BeaconTime,
+                                            *LoRaMacClassBParams.LoRaMacDevAddr,
+                                            PingSlotCtx.PingPeriod,
+                                            &( PingSlotCtx.PingOffset ) );
+            PingSlotState = PINGSLOT_STATE_SET_TIMER;
+            // no break
+        }
+        case PINGSLOT_STATE_SET_TIMER:
+        {
+            if( CalcNextSlotTime( PingSlotCtx.PingOffset, PingSlotCtx.PingPeriod, &pingSlotTime ) == true )
+            {
+                // Start the timer if the ping slot time is in range
+                PingSlotState = PINGSLOT_STATE_IDLE;
+                TimerSetValue( &PingSlotTimer, pingSlotTime );
+                TimerStart( &PingSlotTimer );
+            }
+            break;
+        }
+        case PINGSLOT_STATE_IDLE:
+        {
+            uint32_t frequency = PingSlotCtx.Frequency;
+
+            if( PingSlotCtx.Ctrl.CustomFreq == 0 )
+            {
+                // Restore floor plan
+                getPhy.Attribute = PHY_PINGSLOT_CHANNEL_FREQ;
+                getPhy.DeviceAddress = *LoRaMacClassBParams.LoRaMacDevAddr;
+                phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+                frequency = phyParam.Value;
+            }
+
+            if( MulticastSlotState != PINGSLOT_STATE_RX )
+            {
+                if( BeaconCtx.Ctrl.BeaconAcquired == 1 )
+                {
+                    RegionComputeRxWindowParameters( *LoRaMacClassBParams.LoRaMacRegion,
+                                                     PingSlotCtx.Datarate,
+                                                     LoRaMacClassBParams.LoRaMacParams->MinRxSymbols,
+                                                     LoRaMacClassBParams.LoRaMacParams->SystemMaxRxError,
+                                                     &pingSlotRxConfig );
+                    PingSlotCtx.SymbolTimeout = pingSlotRxConfig.WindowTimeout;
+                }
+                PingSlotState = PINGSLOT_STATE_RX;
+
+                pingSlotRxConfig.Datarate = PingSlotCtx.Datarate;
+                pingSlotRxConfig.DownlinkDwellTime = LoRaMacClassBParams.LoRaMacParams->DownlinkDwellTime;
+                pingSlotRxConfig.RepeaterSupport = LoRaMacClassBParams.LoRaMacParams->RepeaterSupport;
+                pingSlotRxConfig.Frequency = frequency;
+                pingSlotRxConfig.RxContinuous = false;
+                pingSlotRxConfig.Window = 1;
+
+                RegionRxConfig( *LoRaMacClassBParams.LoRaMacRegion, &pingSlotRxConfig, ( int8_t* )&LoRaMacClassBParams.McpsIndication->RxDatarate );
+
+                if( pingSlotRxConfig.RxContinuous == false )
+                {
+                    Radio.Rx( LoRaMacClassBParams.LoRaMacParams->MaxRxWindow );
+                }
+                else
+                {
+                    Radio.Rx( 0 ); // Continuous mode
+                }
+            }
+            else
+            {
+                // Multicast slots have priority. Skip Rx
+                PingSlotState = PINGSLOT_STATE_SET_TIMER;
+                TimerSetValue( &PingSlotTimer, PingSlotCtx.Cfg.PingSlotWindow );
+                TimerStart( &PingSlotTimer );
+            }
+            break;
+        }
+        default:
+        {
+            PingSlotState = PINGSLOT_STATE_SET_TIMER;
+            break;
+        }
+    }
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBMulticastSlotTimerEvent( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    GetPhyParams_t getPhy;
+    PhyParam_t phyParam;
+    RxConfigParams_t multicastSlotRxConfig;
+    TimerTime_t multicastSlotTime = 0;
+    TimerTime_t slotTime = 0;
+    MulticastParams_t *cur = LoRaMacClassBParams.MulticastChannels;
+
+    TimerStop( &MulticastSlotTimer );
+
+    if( cur == NULL )
+    {
+        return;
+    }
+
+    switch( MulticastSlotState )
+    {
+        case PINGSLOT_STATE_CALC_PING_OFFSET:
+        {
+            while( cur != NULL )
+            {
+                LoRaMacBeaconComputePingOffset( BeaconCtx.BeaconTime,
+                                                cur->Address,
+                                                PingSlotCtx.PingPeriod,
+                                                &( cur->PingOffset ) );
+                cur = cur->Next;
+            }
+            MulticastSlotState = PINGSLOT_STATE_SET_TIMER;
+            // no break
+        }
+        case PINGSLOT_STATE_SET_TIMER:
+        {
+            cur = LoRaMacClassBParams.MulticastChannels;
+            PingSlotCtx.NextMulticastChannel = NULL;
+
+            while( cur != NULL )
+            {
+                if( CalcNextSlotTime( cur->PingOffset, PingSlotCtx.PingPeriod, &slotTime ) == true )
+                {
+                    if( ( multicastSlotTime == 0 ) || ( multicastSlotTime > slotTime ) )
+                    {
+                        // Update the slot time and the next multicast channel
+                        multicastSlotTime = slotTime;
+                        PingSlotCtx.NextMulticastChannel = cur;
+                    }
+                }
+                cur = cur->Next;
+            }
+
+            if( PingSlotCtx.NextMulticastChannel != NULL )
+            {
+                // Start the timer if the ping slot time is in range
+                MulticastSlotState = PINGSLOT_STATE_IDLE;
+                TimerSetValue( &MulticastSlotTimer, multicastSlotTime );
+                TimerStart( &MulticastSlotTimer );
+            }
+            break;
+        }
+        case PINGSLOT_STATE_IDLE:
+        {
+            uint32_t frequency = PingSlotCtx.Frequency;
+
+            if( PingSlotCtx.NextMulticastChannel == NULL )
+            {
+                MulticastSlotState = PINGSLOT_STATE_SET_TIMER;
+                TimerSetValue( &MulticastSlotTimer, 1 );
+                TimerStart( &MulticastSlotTimer );
+                break;
+            }
+
+            if( PingSlotCtx.Ctrl.CustomFreq == 0 )
+            {
+                // Restore floor plan
+                getPhy.Attribute = PHY_PINGSLOT_CHANNEL_FREQ;
+                getPhy.DeviceAddress = PingSlotCtx.NextMulticastChannel->Address;
+                phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+                frequency = phyParam.Value;
+            }
+
+            if( BeaconCtx.Ctrl.BeaconAcquired == 1 )
+            {
+                RegionComputeRxWindowParameters( *LoRaMacClassBParams.LoRaMacRegion,
+                                                 PingSlotCtx.Datarate,
+                                                 LoRaMacClassBParams.LoRaMacParams->MinRxSymbols,
+                                                 LoRaMacClassBParams.LoRaMacParams->SystemMaxRxError,
+                                                 &multicastSlotRxConfig );
+                PingSlotCtx.SymbolTimeout = multicastSlotRxConfig.WindowTimeout;
+            }
+            MulticastSlotState = PINGSLOT_STATE_RX;
+
+            multicastSlotRxConfig.Datarate = PingSlotCtx.Datarate;
+            multicastSlotRxConfig.DownlinkDwellTime = LoRaMacClassBParams.LoRaMacParams->DownlinkDwellTime;
+            multicastSlotRxConfig.RepeaterSupport = LoRaMacClassBParams.LoRaMacParams->RepeaterSupport;
+            multicastSlotRxConfig.Frequency = frequency;
+            multicastSlotRxConfig.RxContinuous = false;
+            multicastSlotRxConfig.Window = 1;
+
+            RegionRxConfig( *LoRaMacClassBParams.LoRaMacRegion, &multicastSlotRxConfig, ( int8_t* )&LoRaMacClassBParams.McpsIndication->RxDatarate );
+
+            if( multicastSlotRxConfig.RxContinuous == false )
+            {
+                Radio.Rx( LoRaMacClassBParams.LoRaMacParams->MaxRxWindow );
+            }
+            else
+            {
+                Radio.Rx( 0 ); // Continuous mode
+            }
+            break;
+        }
+        default:
+        {
+            MulticastSlotState = PINGSLOT_STATE_SET_TIMER;
+            break;
+        }
+    }
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+bool LoRaMacClassBRxBeacon( uint8_t *payload, uint16_t size )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    GetPhyParams_t getPhy;
+    PhyParam_t phyParam;
+    bool beaconReceived = false;
+    uint16_t crc0 = 0;
+    uint16_t crc1 = 0;
+    uint16_t beaconCrc0 = 0;
+    uint16_t beaconCrc1 = 0;
+    uint8_t rfuOffset1 = 0;
+    uint8_t rfuOffset2 = 0;
+
+    getPhy.Attribute = PHY_BEACON_SIZE;
+    phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+
+    // For beacon payload sizes > 17 we need to apply an offset
+    if( phyParam.Value > 17 )
+    {
+        rfuOffset1 = 1;
+        rfuOffset2 = 1;
+    }
+
+    // Verify if we are in the state where we expect a beacon
+    if( ( BeaconState == BEACON_STATE_RX ) || ( BeaconCtx.Ctrl.AcquisitionPending == 1 ) )
+    {
+        if( size == phyParam.Value )
+        {
+            beaconCrc0 = ( ( uint16_t ) payload[6 + rfuOffset1] ) & 0x00FF;
+            beaconCrc0 |= ( ( uint16_t ) payload[7 + rfuOffset1] << 8 ) & 0xFF00;
+            crc0 = BeaconCrc( payload, 6 + rfuOffset1 );
+
+            // Validate the first crc of the beacon frame
+            if( crc0 == beaconCrc0 )
+            {
+                BeaconCtx.BeaconTime  = ( ( uint32_t ) payload[2 + rfuOffset1] ) & 0x000000FF;
+                BeaconCtx.BeaconTime |= ( ( uint32_t ) ( payload[3 + rfuOffset1] << 8 ) ) & 0x0000FF00;
+                BeaconCtx.BeaconTime |= ( ( uint32_t ) ( payload[4 + rfuOffset1] << 16 ) ) & 0x00FF0000;
+                BeaconCtx.BeaconTime |= ( ( uint32_t ) ( payload[5 + rfuOffset1] << 24 ) ) & 0xFF000000;
+                LoRaMacClassBParams.MlmeIndication->BeaconInfo.Time = BeaconCtx.BeaconTime;
+                beaconReceived = true;
+            }
+
+            beaconCrc1 = ( ( uint16_t ) payload[15 + rfuOffset1 + rfuOffset2] ) & 0x00FF;
+            beaconCrc1 |= ( ( uint16_t ) payload[16 + rfuOffset1 + rfuOffset2] << 8 ) & 0xFF00;
+            crc1 = BeaconCrc( &payload[8 + rfuOffset1], 7 + rfuOffset2 );
+
+            // Validate the second crc of the beacon frame
+            if( crc1 == beaconCrc1 )
+            {
+                // Beacon valid, apply data
+                LoRaMacClassBParams.MlmeIndication->BeaconInfo.GwSpecific.InfoDesc = payload[8 + rfuOffset1];
+                memcpy1( LoRaMacClassBParams.MlmeIndication->BeaconInfo.GwSpecific.Info, &payload[9 + rfuOffset1], 7 );
+                beaconReceived = true;
+            }
+
+            // Reset beacon variables, if one of the crc is valid
+            if( beaconReceived == true )
+            {
+                BeaconCtx.LastBeaconRx = TimerGetCurrentTime( ) - Radio.TimeOnAir( MODEM_LORA, size );
+                BeaconCtx.Ctrl.BeaconAcquired = 1;
+                BeaconCtx.Ctrl.BeaconMode = 1;
+                BeaconCtx.SymbolTimeout = BeaconCtx.Cfg.SymbolToDefault;
+                BeaconState = BEACON_STATE_LOCKED;
+
+                LoRaMacClassBBeaconTimerEvent( );
+            }
+        }
+
+        if( BeaconState == BEACON_STATE_RX )
+        {
+            BeaconState = BEACON_STATE_TIMEOUT;
+            LoRaMacClassBBeaconTimerEvent( );
+        }
+        // Return always true, when we expect a beacon.
+        beaconReceived = true;
+    }
+
+    return beaconReceived;
+#else
+    return false;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+bool LoRaMacClassBIsBeaconExpected( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( ( BeaconCtx.Ctrl.AcquisitionPending == 1 ) ||
+        ( BeaconCtx.Ctrl.AcquisitionTimerSet == 1 ) ||
+        ( BeaconState == BEACON_STATE_RX ) )
+    {
+        return true;
+    }
+    return false;
+#else
+    return false;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+bool LoRaMacClassBIsPingExpected( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( PingSlotState == PINGSLOT_STATE_RX )
+    {
+        return true;
+    }
+    return false;
+#else
+    return false;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+bool LoRaMacClassBIsAcquisitionPending( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( BeaconCtx.Ctrl.AcquisitionPending == 1 )
+    {
+        return true;
+    }
+    return false;
+#else
+    return false;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+bool LoRaMacClassBIsAcquisitionTimerSet( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( BeaconCtx.Ctrl.AcquisitionTimerSet == 1 )
+    {
+        return true;
+    }
+    return false;
+#else
+    return false;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+bool LoRaMacClassBIsBeaconModeActive( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( BeaconCtx.Ctrl.BeaconMode == 1 )
+    {
+        return true;
+    }
+    return false;
+#else
+    return false;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBSetPingSlotInfo( uint8_t periodicity )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    PingSlotCtx.PingNb = 128 / ( 1 << periodicity );
+    PingSlotCtx.PingPeriod = BeaconCtx.Cfg.WindowSlots / PingSlotCtx.PingNb;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBHaltBeaconing( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( ( BeaconState == BEACON_STATE_TIMEOUT ) ||
+        ( BeaconState == BEACON_STATE_SWITCH_CLASS ) )
+    {
+        // Update the state machine before halt
+        LoRaMacClassBBeaconTimerEvent( );
+    }
+
+    // Halt beacon state machine
+    BeaconState = BEACON_STATE_HALT;
+
+    // Halt ping slot state machine
+    TimerStop( &BeaconTimer );
+
+    // Halt ping slot state machine
+    TimerStop( &PingSlotTimer );
+
+    // Halt multicast ping slot state machine
+    TimerStop( &MulticastSlotTimer );
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBResumeBeaconing( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( BeaconState == BEACON_STATE_HALT )
+    {
+        BeaconCtx.Ctrl.ResumeBeaconing = 1;
+
+        // Set default state
+        BeaconState = BEACON_STATE_LOCKED;
+
+        if( BeaconCtx.Ctrl.BeaconAcquired == 0 )
+        {
+            // Set the default state for beacon less operation
+            BeaconState = BEACON_STATE_REACQUISITION;
+        }
+        TimerSetValue( &BeaconTimer, 1 );
+        TimerStart( &BeaconTimer );
+    }
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+LoRaMacStatus_t LoRaMacClassBSwitchClass( DeviceClass_t nextClass )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( nextClass == CLASS_B )
+    {// Switch to from class a to class b
+        if( ( BeaconCtx.Ctrl.BeaconMode == 1 ) && ( PingSlotCtx.Ctrl.Assigned == 1 ) )
+        {
+            return LORAMAC_STATUS_OK;
+        }
+    }
+    if( nextClass == CLASS_A )
+    {// Switch from class b to class a
+        BeaconState = BEACON_STATE_ACQUISITION;
+        return LORAMAC_STATUS_OK;
+    }
+    return LORAMAC_STATUS_SERVICE_UNKNOWN;
+#else
+    return LORAMAC_STATUS_SERVICE_UNKNOWN;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+LoRaMacStatus_t LoRaMacClassBMibGetRequestConfirm( MibRequestConfirm_t *mibGet )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    LoRaMacStatus_t status;
+
+    switch( mibGet->Type )
+    {
+        case MIB_BEACON_INTERVAL:
+        {
+            mibGet->Param.BeaconInterval = BeaconCtx.Cfg.Interval;
+            break;
+        }
+        case MIB_BEACON_RESERVED:
+        {
+            mibGet->Param.BeaconReserved = BeaconCtx.Cfg.Reserved;
+            break;
+        }
+        case MIB_BEACON_GUARD:
+        {
+            mibGet->Param.BeaconGuard = BeaconCtx.Cfg.Guard;
+            break;
+        }
+        case MIB_BEACON_WINDOW:
+        {
+            mibGet->Param.BeaconWindow = BeaconCtx.Cfg.Window;
+            break;
+        }
+        case MIB_BEACON_WINDOW_SLOTS:
+        {
+            mibGet->Param.BeaconWindowSlots = BeaconCtx.Cfg.WindowSlots;
+            break;
+        }
+        case MIB_PING_SLOT_WINDOW:
+        {
+            mibGet->Param.PingSlotWindow = PingSlotCtx.Cfg.PingSlotWindow;
+            break;
+        }
+        case MIB_BEACON_SYMBOL_TO_DEFAULT:
+        {
+            mibGet->Param.BeaconSymbolToDefault = BeaconCtx.Cfg.SymbolToDefault;
+            break;
+        }
+        case MIB_BEACON_SYMBOL_TO_EXPANSION_MAX:
+        {
+            mibGet->Param.BeaconSymbolToExpansionMax = BeaconCtx.Cfg.SymbolToExpansionMax;
+            break;
+        }
+        case MIB_PING_SLOT_SYMBOL_TO_EXPANSION_MAX:
+        {
+            mibGet->Param.PingSlotSymbolToExpansionMax = PingSlotCtx.Cfg.SymbolToExpansionMax;
+            break;
+        }
+        case MIB_BEACON_SYMBOL_TO_EXPANSION_FACTOR:
+        {
+            mibGet->Param.BeaconSymbolToExpansionFactor = BeaconCtx.Cfg.SymbolToExpansionFactor;
+            break;
+        }
+        case MIB_PING_SLOT_SYMBOL_TO_EXPANSION_FACTOR:
+        {
+            mibGet->Param.PingSlotSymbolToExpansionFactor = PingSlotCtx.Cfg.SymbolToExpansionFactor;
+            break;
+        }
+        case MIB_MAX_BEACON_LESS_PERIOD:
+        {
+            mibGet->Param.MaxBeaconLessPeriod = BeaconCtx.Cfg.MaxBeaconLessPeriod;
+            break;
+        }
+        default:
+        {
+            status = LORAMAC_STATUS_SERVICE_UNKNOWN;
+            break;
+        }
+    }
+    return status;
+#else
+    return LORAMAC_STATUS_SERVICE_UNKNOWN;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+LoRaMacStatus_t LoRaMacMibClassBSetRequestConfirm( MibRequestConfirm_t *mibSet )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    LoRaMacStatus_t status;
+
+    switch( mibSet->Type )
+    {
+        case MIB_BEACON_INTERVAL:
+        {
+            BeaconCtx.Cfg.Interval = mibSet->Param.BeaconInterval;
+            break;
+        }
+        case MIB_BEACON_RESERVED:
+        {
+            BeaconCtx.Cfg.Reserved = mibSet->Param.BeaconReserved;
+            break;
+        }
+        case MIB_BEACON_GUARD:
+        {
+            BeaconCtx.Cfg.Guard = mibSet->Param.BeaconGuard;
+            break;
+        }
+        case MIB_BEACON_WINDOW:
+        {
+            BeaconCtx.Cfg.Window = mibSet->Param.BeaconWindow;
+            break;
+        }
+        case MIB_BEACON_WINDOW_SLOTS:
+        {
+            BeaconCtx.Cfg.WindowSlots = mibSet->Param.BeaconWindowSlots;
+            break;
+        }
+        case MIB_PING_SLOT_WINDOW:
+        {
+            PingSlotCtx.Cfg.PingSlotWindow = mibSet->Param.PingSlotWindow;
+            break;
+        }
+        case MIB_BEACON_SYMBOL_TO_DEFAULT:
+        {
+            BeaconCtx.Cfg.SymbolToDefault = mibSet->Param.BeaconSymbolToDefault;
+            break;
+        }
+        case MIB_BEACON_SYMBOL_TO_EXPANSION_MAX:
+        {
+            BeaconCtx.Cfg.SymbolToExpansionMax = mibSet->Param.BeaconSymbolToExpansionMax;
+            break;
+        }
+        case MIB_PING_SLOT_SYMBOL_TO_EXPANSION_MAX:
+        {
+            PingSlotCtx.Cfg.SymbolToExpansionMax = mibSet->Param.PingSlotSymbolToExpansionMax;
+            break;
+        }
+        case MIB_BEACON_SYMBOL_TO_EXPANSION_FACTOR:
+        {
+            BeaconCtx.Cfg.SymbolToExpansionFactor = mibSet->Param.BeaconSymbolToExpansionFactor;
+            break;
+        }
+        case MIB_PING_SLOT_SYMBOL_TO_EXPANSION_FACTOR:
+        {
+            PingSlotCtx.Cfg.SymbolToExpansionFactor = mibSet->Param.PingSlotSymbolToExpansionFactor;
+            break;
+        }
+        case MIB_MAX_BEACON_LESS_PERIOD:
+        {
+            BeaconCtx.Cfg.MaxBeaconLessPeriod = mibSet->Param.MaxBeaconLessPeriod;
+            break;
+        }
+        default:
+        {
+            status = LORAMAC_STATUS_SERVICE_UNKNOWN;
+            break;
+        }
+    }
+    return status;
+#else
+    return LORAMAC_STATUS_SERVICE_UNKNOWN;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBPingSlotInfoAns( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    uint8_t index = LORA_MAC_MLME_CONFIRM_QUEUE_LEN;
+
+    index = LoRaMacClassBCallbacks.GetMlmeConfrimIndex( LoRaMacClassBParams.MlmeConfirmQueue, MLME_PING_SLOT_INFO );
+    if( index < LORA_MAC_MLME_CONFIRM_QUEUE_LEN )
+    {
+        LoRaMacClassBParams.MlmeConfirmQueue[index].Status = LORAMAC_EVENT_INFO_STATUS_OK;
+        PingSlotCtx.Ctrl.Assigned = 1;
+    }
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+uint8_t LoRaMacClassBPingSlotChannelReq( uint8_t datarate, uint32_t frequency )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    uint8_t status = 0x03;
+    VerifyParams_t verify;
+    GetPhyParams_t getPhy;
+    PhyParam_t phyParam;
+
+    if( frequency != 0 )
+    {
+        if( Radio.CheckRfFrequency( frequency ) == false )
+        {
+            status &= 0xFE; // Channel frequency KO
+        }
+
+        verify.DatarateParams.Datarate = datarate;
+        verify.DatarateParams.DownlinkDwellTime = LoRaMacClassBParams.LoRaMacParams->DownlinkDwellTime;
+
+        if( RegionVerify( *LoRaMacClassBParams.LoRaMacRegion, &verify, PHY_RX_DR ) == false )
+        {
+            status &= 0xFD; // Datarate range KO
+        }
+
+        if( status == 0x03 )
+        {
+            PingSlotCtx.Ctrl.CustomFreq = 1;
+            PingSlotCtx.Frequency = frequency;
+            PingSlotCtx.Datarate = datarate;
+        }
+    }
+    else
+    {
+        getPhy.Attribute = PHY_BEACON_CHANNEL_DR;
+        phyParam = RegionGetPhyParam( *LoRaMacClassBParams.LoRaMacRegion, &getPhy );
+
+        PingSlotCtx.Ctrl.CustomFreq = 0;
+        PingSlotCtx.Datarate = phyParam.Value;
+    }
+    return status;
+#else
+    return 0;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+void LoRaMacClassBBeaconTimingAns( uint16_t beaconTimingDelay, uint8_t beaconTimingChannel )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    uint8_t index = LORA_MAC_MLME_CONFIRM_QUEUE_LEN;
+    TimerTime_t currentTime = TimerGetCurrentTime( );
+
+    BeaconCtx.BeaconTimingDelay = ( BeaconCtx.Cfg.DelayBeaconTimingAns * beaconTimingDelay );
+    BeaconCtx.BeaconTimingChannel = beaconTimingChannel;
+
+    index = LoRaMacClassBCallbacks.GetMlmeConfrimIndex( LoRaMacClassBParams.MlmeConfirmQueue, MLME_BEACON_TIMING );
+    if( index < LORA_MAC_MLME_CONFIRM_QUEUE_LEN )
+    {
+        if( BeaconCtx.BeaconTimingDelay > BeaconCtx.Cfg.Interval )
+        {
+            // We missed the beacon already
+            BeaconCtx.BeaconTimingDelay = 0;
+            BeaconCtx.BeaconTimingChannel = 0;
+            LoRaMacClassBParams.MlmeConfirmQueue[index].Status = LORAMAC_EVENT_INFO_STATUS_BEACON_NOT_FOUND;
+        }
+        else
+        {
+            BeaconCtx.Ctrl.BeaconDelaySet = 1;
+            BeaconCtx.Ctrl.BeaconChannelSet = 1;
+            BeaconCtx.NextBeaconRx = currentTime + BeaconCtx.BeaconTimingDelay;
+            LoRaMacClassBParams.MlmeConfirmQueue[index].Status = LORAMAC_EVENT_INFO_STATUS_OK;
+        }
+
+        LoRaMacClassBParams.MlmeConfirm->BeaconTimingDelay = BeaconCtx.BeaconTimingDelay;
+        LoRaMacClassBParams.MlmeConfirm->BeaconTimingChannel = BeaconCtx.BeaconTimingChannel;
+    }
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+bool LoRaMacClassBBeaconFreqReq( uint32_t frequency )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    if( frequency != 0 )
+    {
+        if( Radio.CheckRfFrequency( frequency ) == true )
+        {
+            BeaconCtx.Ctrl.CustomFreq = 1;
+            BeaconCtx.Frequency = frequency;
+            return true;
+        }
+    }
+    else
+    {
+        BeaconCtx.Ctrl.CustomFreq = 0;
+        return true;
+    }
+    return false;
+#else
+    return false;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+TimerTime_t LoRaMacClassBGetBeaconReservedTime( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    return BeaconCtx.Cfg.Reserved;
+#else
+    return 0;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+TimerTime_t LoRaMacClassBGetPingSlotWinTime( void )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    return PingSlotCtx.Cfg.PingSlotWindow;
+#else
+    return 0;
+#endif // LORAMAC_CLASSB_ENABLED
+}
+
+TimerTime_t LoRaMacClassBIsUplinkCollision( TimerTime_t txTimeOnAir )
+{
+#ifdef LORAMAC_CLASSB_ENABLED
+    TimerTime_t currentTime = TimerGetCurrentTime( );
+    TimerTime_t beaconReserved = 0;
+
+    beaconReserved = BeaconCtx.NextBeaconRx -
+                     BeaconCtx.Cfg.Guard -
+                     LoRaMacClassBParams.LoRaMacParams->ReceiveDelay1 -
+                     LoRaMacClassBParams.LoRaMacParams->ReceiveDelay2 -
+                     txTimeOnAir;
+
+    // Check if the next beacon will be received during the next uplink.
+    if( ( currentTime >= beaconReserved ) && ( currentTime < ( BeaconCtx.NextBeaconRx + BeaconCtx.Cfg.Reserved ) ) )
+    {// Next beacon will be sent during the next uplink.
+        return BeaconCtx.Cfg.Reserved;
+    }
+    return 0;
+#else
+    return 0;
+#endif // LORAMAC_CLASSB_ENABLED
+}