rbxii3/firmware
1
0
Fork 0
mirror of https://github.com/meshtastic/firmware.git synced 2025-12-20 09:43:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add weighted tx delay for flooding router

Browse Source
This commit is contained in:
Jm Casler
2022-03-14 17:47:01 -07:00
parent bb15a001f7
commit 3816a2fbe0
4 changed files with 66 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/mesh/RadioInterface.cpp
View File

@@ -180,7 +180,38 @@ uint32_t RadioInterface::getTxDelayMsec()
*/
// const uint32_t MAX_TX_WAIT_MSEC = 2000; // stress test would still fail occasionally with 1000
return random(MIN_TX_WAIT_MSEC, shortPacketMsec);
return random((MIN_TX_WAIT_MSEC), (MIN_TX_WAIT_MSEC + shortPacketMsec));
}
/** The delay to use when we want to send something but the ether is busy */
uint32_t RadioInterface::getTxDelayMsecWeighted(float snr)
{
/** At the low end we want to pick a delay large enough that anyone who just completed sending (some other node)
* has had enough time to switch their radio back into receive mode.
*/
const uint32_t MIN_TX_WAIT_MSEC = 100;
// The minimum value for a LoRa SNR
const uint32_t SNR_MIN = -20;
// The maximum value for a LoRa SNR
const uint32_t SNR_MAX = 15;
// high SNR = Long Delay
// low SNR = Short Delay
uint32_t delay = 0;
if (radioConfig.preferences.role == Role_Router) {
delay = map(snr, SNR_MIN, SNR_MAX, MIN_TX_WAIT_MSEC, (MIN_TX_WAIT_MSEC + (shortPacketMsec / 2)));
DEBUG_MSG("rx_snr found in packet. As a router, setting tx delay:%d\n", delay);
} else {
delay = map(snr, SNR_MIN, SNR_MAX, MIN_TX_WAIT_MSEC + (shortPacketMsec / 2), (MIN_TX_WAIT_MSEC + shortPacketMsec * 2));
DEBUG_MSG("rx_snr found in packet. Setting tx delay:%d\n", delay);
}
return delay;
}
void printPacket(const char *prefix, const MeshPacket *p)