Merge pull request #9251 from hasnainvirk/randomizing_join_retrial

0xc0170 · web-flow · commit 4ec7dd722dde · 2019-01-07T10:24:30.000Z
LoRaWAN: Randomizing backoff for Join process
diff --git a/features/lorawan/lorastack/phy/LoRaPHY.cpp b/features/lorawan/lorastack/phy/LoRaPHY.cpp
@@ -282,6 +282,8 @@ lorawan_time_t LoRaPHY::update_band_timeoff(bool joined, bool duty_cycle,
 
             if (bands[i].off_time != 0) {
                 next_tx_delay = MIN(bands[i].off_time - txDoneTime, next_tx_delay);
+                // add a random delay from 200ms to a 1000ms
+                next_tx_delay += (rand() % 800 + 200);
             }
         } else {
             // if network has been joined

Original file line number	Diff line number	Diff line change
`@@ -282,6 +282,8 @@ lorawan_time_t LoRaPHY::update_band_timeoff(bool joined, bool duty_cycle,`
`282`	`282`
`283`	`283`	`if (bands[i].off_time != 0) {`
`284`	`284`	`next_tx_delay = MIN(bands[i].off_time - txDoneTime, next_tx_delay);`
	`285`	`+ // add a random delay from 200ms to a 1000ms`
	`286`	`+ next_tx_delay += (rand() % 800 + 200);`
`285`	`287`	`}`
`286`	`288`	`} else {`
`287`	`289`	`// if network has been joined`