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-rw-r--r--lora_pkt_fwd/src/lora_pkt_fwd.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/lora_pkt_fwd/src/lora_pkt_fwd.c b/lora_pkt_fwd/src/lora_pkt_fwd.c
index a7214ae..5aae335 100644
--- a/lora_pkt_fwd/src/lora_pkt_fwd.c
+++ b/lora_pkt_fwd/src/lora_pkt_fwd.c
@@ -171,6 +171,14 @@ static char serv_port_up[8] = STR(DEFAULT_PORT_UP); /* server port for upstream
static char serv_port_down[8] = STR(DEFAULT_PORT_DW); /* server port for downstream traffic */
static int keepalive_time = DEFAULT_KEEPALIVE; /* send a PULL_DATA request every X seconds, negative = disabled */
+static bool duty_cycle_enabled = true;
+static uint32_t duty_cycle_time_avail = 0;
+static uint32_t duty_cycle_period = 3600; // seconds in one hour
+static double duty_cycle_ratio = 0.10; // 10%
+static uint32_t duty_cycle_time_max = 3600 * 0.10 * 1000u; // max time-on-air in window
+
+
+
/* statistics collection configuration variables */
static unsigned stat_interval = DEFAULT_STAT; /* time interval (in sec) at which statistics are collected and displayed */
@@ -938,6 +946,31 @@ static int parse_gateway_configuration(const char * conf_file) {
MSG("INFO: upstream PUSH_DATA time-out is configured to %u ms\n", (unsigned)(push_timeout_half.tv_usec / 500));
}
+
+ /* duty-cycle limiting */
+ val = json_object_get_value(conf_obj, "duty_cycle_enabled");
+ if (json_value_get_type(val) == JSONBoolean) {
+ duty_cycle_enabled = (bool)json_value_get_boolean(val);
+ }
+ MSG("INFO: duty cycle will%s be enforced\n", (duty_cycle_enabled ? "" : " NOT"));
+
+ if (duty_cycle_enabled) {
+ val = json_object_get_value(conf_obj, "duty_cycle_period");
+ if (val != NULL) {
+ duty_cycle_period = (unsigned)json_value_get_number(val);
+ }
+ MSG("INFO: duty cycle period %u s\n", (duty_cycle_period));
+
+ val = json_object_get_value(conf_obj, "duty_cycle_ratio");
+ if (val != NULL) {
+ duty_cycle_ratio = (double)json_value_get_number(val);
+ }
+ MSG("INFO: duty cycle %f %%\n", (duty_cycle_ratio * 100));
+
+ duty_cycle_time_max = duty_cycle_period * 1000u * duty_cycle_ratio;
+ }
+
+
/* packet filtering parameters */
val = json_object_get_value(conf_obj, "best_packet_filter");
if (json_value_get_type(val) == JSONBoolean) {
@@ -1681,6 +1714,8 @@ int main(int argc, char** argv)
printf("# PUSH_DATA datagrams sent: %u (%u bytes)\n", cp_up_dgram_sent, cp_up_network_byte);
printf("# PUSH_DATA acknowledged: %.2f%%\n", 100.0 * up_ack_ratio);
printf("### [DOWNSTREAM] ###\n");
+ if (duty_cycle_enabled)
+ printf("# TIME ON AIR available: %u ms\n", duty_cycle_time_avail);
printf("# PULL_DATA sent: %u (%.2f%% acknowledged)\n", cp_dw_pull_sent, 100.0 * dw_ack_ratio);
printf("# PULL_RESP(onse) datagrams received: %u (%u bytes)\n", cp_dw_dgram_rcv, cp_dw_network_byte);
printf("# RF packets sent to concentrator: %u (%u bytes)\n", (cp_nb_tx_ok+cp_nb_tx_fail), cp_dw_payload_byte);
@@ -3308,6 +3343,24 @@ void thread_valid(void) {
while (!exit_sig && !quit_sig) {
wait_ms(1000);
+ if (duty_cycle_enabled) {
+ static struct timespec last = { 0, 0 };
+ struct timespec now;
+ clock_gettime(CLOCK_MONOTONIC, &now);
+
+ if (last.tv_sec != 0) {
+ // uint64(now.tv_sec) * 1000 + now.tv_nsec / 1000000
+
+ duty_cycle_time_avail += difftimespec(now, last) * 1000u * duty_cycle_ratio;
+
+ if (duty_cycle_time_avail > duty_cycle_time_max) {
+ duty_cycle_time_avail = duty_cycle_time_max;
+ }
+ }
+
+ last = now;
+ }
+
/* calculate when the time reference was last updated */
pthread_mutex_lock(&mx_timeref);
gps_ref_age = (long)difftime(time(NULL), time_reference_gps.systime);