ChannelPlan_KR920.h

00001 /**   __  ___     ____  _    ______        __     ____         __                  ____
00002  *   /  |/  /_ __/ / /_(_)__/_  __/__ ____/ /    / __/_ _____ / /____ __ _  ___   /  _/__  ____
00003  *  / /|_/ / // / / __/ /___// / / -_) __/ _ \  _\ \/ // (_-</ __/ -_)  ' \(_-<  _/ // _ \/ __/ __
00004  * /_/  /_/\_,_/_/\__/_/    /_/  \__/\__/_//_/ /___/\_, /___/\__/\__/_/_/_/___/ /___/_//_/\__/ /_/
00005  * Copyright (C) 2015 by Multi-Tech Systems        /___/
00006  *
00007  *
00008  * @author Jason Reiss
00009  * @date   10-31-2015
00010  * @brief  lora::ChannelPlan provides an interface for LoRaWAN channel schemes
00011  *
00012  * @details
00013  *
00014  */
00015 
00016 #ifndef __CHANNEL_PLAN_KR920_H__
00017 #define __CHANNEL_PLAN_KR920_H__
00018 
00019 #include "Lora.h"
00020 #include "SxRadio.h"
00021 #include <vector>
00022 #include "ChannelPlan.h"
00023 
00024 namespace lora {
00025 
00026     const uint8_t  KR920_125K_NUM_CHANS = 16;        //!< Number of 125k channels in KR920 channel plan
00027     const uint8_t  KR920_DEFAULT_NUM_CHANS = 3;      //!< Number of default channels in KR920 channel plan
00028     const uint32_t KR920_125K_FREQ_BASE = 922100000; //!< Frequency base for 125k KR920 uplink channels
00029     const uint32_t KR920_125K_FREQ_STEP = 200000;    //!< Frequency step for 125k KR920 uplink channels
00030     const uint32_t KR920_RX2_FREQ = 921900000;       //!< Frequency default for second rx window in KR920
00031     const uint8_t  KR920_TX_POWER_MAX = 14;          //!< Max power for KR920 channel plan
00032     const uint8_t  KR920_BEACON_DR = DR_3;           //!< Default beacon datarate
00033     const uint32_t KR920_BEACON_FREQ = 923100000U;   //!< Default beacon broadcast frequency
00034 
00035     class ChannelPlan_KR920 : public lora::ChannelPlan {
00036         public:
00037             /**
00038              * ChannelPlan constructor
00039              * @param radio SxRadio object used to set Tx/Rx config
00040              * @param settings Settings object
00041              */
00042             ChannelPlan_KR920();
00043             ChannelPlan_KR920(Settings* settings);
00044             ChannelPlan_KR920(SxRadio* radio, Settings* settings);
00045 
00046             /**
00047              * ChannelPlan destructor
00048              */
00049             virtual ~ChannelPlan_KR920();
00050 
00051             /**
00052              * Initialize channels, datarates and duty cycle bands according to current channel plan in settings
00053              */
00054             virtual void Init();
00055 
00056             /**
00057              * Get the next channel to use to transmit
00058              * @return LORA_OK if channel was found
00059              * @return LORA_NO_CHANS_ENABLED
00060              */
00061             virtual uint8_t GetNextChannel();
00062 
00063             /**
00064              * Add a channel to the ChannelPlan
00065              * @param index of channel, use -1 to add to end
00066              * @param channel settings to add
00067              */
00068             virtual uint8_t AddChannel(int8_t index, Channel channel);
00069 
00070             /**
00071              * Get channel at index
00072              * @return Channel
00073              */
00074             virtual Channel GetChannel(int8_t index);
00075 
00076             /**
00077              * Get rx window settings for requested window
00078              * RX_1, RX_2, RX_BEACON, RX_SLOT
00079              * @param window
00080              * @return RxWindow
00081              */
00082             virtual RxWindow GetRxWindow(uint8_t window, int8_t id = 0);
00083 
00084             /**
00085              * Get datarate to use on the join request
00086              * @return datarate index
00087              */
00088             virtual uint8_t GetJoinDatarate();
00089 
00090             /**
00091              * Calculate the next time a join request is possible
00092              * @param size of join frame
00093              * @returns LORA_OK
00094              */
00095             virtual uint8_t CalculateJoinBackoff(uint8_t size);
00096 
00097             /**
00098              * Get next channel and set the SxRadio tx config with current settings
00099              * @return LORA_OK
00100              */
00101             virtual uint8_t SetTxConfig();
00102 
00103             /**
00104              * Set frequency sub band if supported by plan
00105              * @param sub_band
00106              * @return LORA_OK
00107              */
00108             virtual uint8_t SetFrequencySubBand(uint8_t sub_band);
00109 
00110            /**
00111              * Callback for Join Accept packet to load optional channels
00112              * @return LORA_OK
00113              */
00114             virtual uint8_t HandleJoinAccept(const uint8_t* buffer, uint8_t size);
00115 
00116             /**
00117              * Callback to for rx parameter setup ServerCommand
00118              * @param payload packet data
00119              * @param index of start of command buffer
00120              * @param size number of bytes in command buffer
00121              * @param[out] status to be returned in MoteCommand answer
00122              * @return LORA_OK
00123              */
00124             virtual uint8_t HandleRxParamSetup(const uint8_t* payload, uint8_t index, uint8_t size, uint8_t& status);
00125 
00126             /**
00127              * Callback to for new channel ServerCommand
00128              * @param payload packet data
00129              * @param index of start of command buffer
00130              * @param size number of bytes in command buffer
00131              * @param[out] status to be returned in MoteCommand answer
00132              * @return LORA_OK
00133              */
00134             virtual uint8_t HandleNewChannel(const uint8_t* payload, uint8_t index, uint8_t size, uint8_t& status);
00135 
00136             /**
00137              * Callback to for ping slot channel request ServerCommand
00138              * @param payload packet data
00139              * @param index of start of command buffer
00140              * @param size number of bytes in command buffer
00141              * @param[out] status to be returned in MoteCommand answer
00142              * @return LORA_OK
00143              */
00144             virtual uint8_t HandlePingSlotChannelReq(const uint8_t* payload, uint8_t index, uint8_t size, uint8_t& status);
00145 
00146             /**
00147              * Callback to for beacon frequency request ServerCommand
00148              * @param payload packet data
00149              * @param index of start of command buffer
00150              * @param size number of bytes in command buffer
00151              * @param[out] status to be returned in MoteCommand answer
00152              * @return LORA_OK
00153              */
00154             virtual uint8_t HandleBeaconFrequencyReq(const uint8_t* payload, uint8_t index, uint8_t size, uint8_t& status);
00155 
00156             /**
00157              * Callback to for adaptive datarate ServerCommand
00158              * @param payload packet data
00159              * @param index of start of command buffer
00160              * @param size number of bytes in command buffer
00161              * @param[out] status to be returned in MoteCommand answer
00162              * @return LORA_OK
00163              */
00164             virtual uint8_t HandleAdrCommand(const uint8_t* payload, uint8_t index, uint8_t size, uint8_t& status);
00165 
00166             /**
00167              * Validate the configuration after multiple ADR commands have been applied
00168              * @return status to be returned in MoteCommand answer
00169              */
00170             virtual uint8_t ValidateAdrConfiguration();
00171 
00172             /**
00173              * Update duty cycle with at given frequency and time on air
00174              * @param freq frequency
00175              * @param time_on_air_ms tx time on air
00176              */
00177             virtual void UpdateDutyCycle(uint32_t freq, uint32_t time_on_air_ms);
00178 
00179             /**
00180              * Get the time the radio must be off air to comply with regulations
00181              * Time to wait may be dependent on duty-cycle restrictions per channel
00182              * Or duty-cycle of join requests if OTAA is being attempted
00183              * @return ms of time to wait for next tx opportunity
00184              */
00185             virtual uint32_t GetTimeOffAir();
00186 
00187             /**
00188              * Get the channels in use by current channel plan
00189              * @return channel frequencies
00190              */
00191             virtual std::vector<uint32_t> GetChannels();
00192 
00193             /**
00194              * Get the channel datarate ranges in use by current channel plan
00195              * @return channel datarate ranges
00196              */
00197             virtual std::vector<uint8_t> GetChannelRanges();
00198 
00199             /**
00200              * Print log message for given rx window
00201              * @param wnd 1 or 2
00202              */
00203             virtual void LogRxWindow(uint8_t wnd);
00204 
00205             /**
00206              * Enable the default channels of the channel plan
00207              */
00208             virtual void EnableDefaultChannels();
00209 
00210             /**
00211              * Called when MAC layer doesn't know about a command.
00212              * Use to add custom or new mac command handling
00213              * @return LORA_OK
00214              */
00215             virtual uint8_t HandleMacCommand(uint8_t* payload, uint8_t& index);
00216 
00217             /**
00218              * Set LBT time and threshold to defaults
00219              */
00220             virtual void DefaultLBT();
00221 
00222             /**
00223              * Check if this packet is a beacon and if so extract parameters needed
00224              * @param payload of potential beacon
00225              * @param size of the packet
00226              * @param [out] data extracted from the beacon if this packet was indeed a beacon
00227              * @return true if this packet is beacon, false if not
00228              */
00229             virtual uint8_t DecodeBeacon(const uint8_t* payload,
00230                                       size_t size,
00231                                       BeaconData_t& data);
00232 
00233         protected:
00234 
00235             static const uint8_t KR920_TX_POWERS[8];                    //!< List of available tx powers
00236             static const uint8_t KR920_RADIO_POWERS[21];                 //!< List of calibrated tx powers
00237             static const uint8_t KR920_MAX_PAYLOAD_SIZE[];              //!< List of max payload sizes for each datarate
00238             static const uint8_t KR920_MAX_PAYLOAD_SIZE_REPEATER[];     //!< List of repeater compatible max payload sizes for each datarate
00239 
00240             typedef struct __attribute__((packed)) {
00241                 uint8_t RFU[2];
00242                 uint8_t Time[4];
00243                 uint8_t CRC1[2];
00244                 uint8_t GwSpecific[7];
00245                 uint8_t CRC2[2];
00246             } BCNPayload;
00247     };
00248 }
00249 
00250 #endif //__CHANNEL_PLAN_KR920_H__