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loramac_mcps_req_t Struct Reference

loramac_mcps_req_t Struct Reference

#include <lorawan_data_structures.h>

Data Fields

mcps_type_t type
uint8_t fport
int8_t data_rate
uint8_t nb_trials
void * f_buffer
 Payload data.
uint16_t f_buffer_size
 Payload size.

Detailed Description

LoRaMAC MCPS-Request structure.

Definition at line 768 of file lorawan_data_structures.h.


Field Documentation

int8_t data_rate

Uplink datarate, if ADR is off.

Definition at line 785 of file lorawan_data_structures.h.

void* f_buffer

Payload data.

A pointer to the buffer of the frame payload.

Definition at line 812 of file lorawan_data_structures.h.

uint16_t f_buffer_size

Payload size.

The size of the frame payload.

Definition at line 817 of file lorawan_data_structures.h.

uint8_t fport

Frame port field. Must be set if the payload is not empty. Use the application-specific frame port values: [1...223].

LoRaWAN Specification V1.0.2, chapter 4.3.2.

Definition at line 780 of file lorawan_data_structures.h.

uint8_t nb_trials

The number of trials to transmit the frame, if the LoRaMAC layer did not receive an acknowledgment. The MAC performs a datarate adaptation according to the LoRaWAN Specification V1.0.2, chapter 18.4, as in the following table:

Transmission nb | Data Rate ----------------|----------- 1 (first) | DR 2 | DR 3 | max(DR-1,0) 4 | max(DR-1,0) 5 | max(DR-2,0) 6 | max(DR-2,0) 7 | max(DR-3,0) 8 | max(DR-3,0)

Note that if nb_trials is set to 1 or 2, the MAC will not decrease the datarate, if the LoRaMAC layer did not receive an acknowledgment.

Definition at line 806 of file lorawan_data_structures.h.

MCPS-Request type.

Definition at line 772 of file lorawan_data_structures.h.