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Added banded contention window allocation

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Mark Qvist 2025-01-08 16:46:16 +01:00
parent 498652f583
commit ae47b89b53
2 changed files with 39 additions and 43 deletions
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45
RNode_Firmware.ino
View File

@ -1349,18 +1349,30 @@ void validate_status() {
}
#if MCU_VARIANT == MCU_ESP32 || MCU_VARIANT == MCU_NRF52
#define _e 2.71828183
#define _S 12.5
float csma_slope(float u) { return (pow(_e,_S*u-_S/2.0))/(pow(_e,_S*u-_S/2.0)+1.0); }
void update_csma_parameters() {
// TODO: Implement
int airtime_pct = (int)(airtime*100);
int new_cw_band = cw_band;
if (airtime_pct <= CSMA_BAND_1_MAX_AIRTIME) { new_cw_band = 1; }
else {
int at = airtime_pct + CSMA_BAND_1_MAX_AIRTIME;
new_cw_band = map(at, CSMA_BAND_1_MAX_AIRTIME, CSMA_BAND_N_MIN_AIRTIME, 2, CSMA_CW_BANDS);
}
if (new_cw_band > CSMA_CW_BANDS) { new_cw_band = CSMA_CW_BANDS; }
if (new_cw_band != cw_band) {
cw_band = (uint8_t)(new_cw_band);
cw_min = (cw_band-1) * CSMA_CW_PER_BAND_WINDOWS;
cw_max = (cw_band) * CSMA_CW_PER_BAND_WINDOWS - 1;
kiss_indicate_csma_stats();
}
}
#endif
void tx_queue_handler() {
if (!airtime_lock && queue_height > 0) {
if (csma_cw == -1) {
csma_cw = random(CSMA_CW_MIN, CSMA_CW_MAX);
csma_cw = random(cw_min, cw_max);
cw_wait_target = csma_cw * csma_slot_ms;
}
@ -1400,8 +1412,6 @@ void tx_queue_handler() {
void loop() {
if (radio_online) {
update_modem_status(); // TODO: Remove debug
#if MCU_VARIANT == MCU_ESP32
modem_packet_t *modem_packet = NULL;
if(modem_packet_queue && xQueueReceive(modem_packet_queue, &modem_packet, 0) == pdTRUE && modem_packet) {
@ -1444,16 +1454,9 @@ void loop() {
#endif
update_modem_status(); // TODO: Remove debug
tx_queue_handler();
update_modem_status(); // TODO: Remove debug
check_modem_status();
update_modem_status(); // TODO: Remove debug
// if (queue_height > 0) {
// #if MCU_VARIANT == MCU_ESP32 || MCU_VARIANT == MCU_NRF52
@ -1514,41 +1517,27 @@ void loop() {
#if MCU_VARIANT == MCU_ESP32 || MCU_VARIANT == MCU_NRF52
buffer_serial();
update_modem_status(); // TODO: Remove debug
if (!fifo_isempty(&serialFIFO)) serial_poll();
update_modem_status(); // TODO: Remove debug
#else
if (!fifo_isempty_locked(&serialFIFO)) serial_poll();
#endif
update_modem_status(); // TODO: Remove debug
#if HAS_DISPLAY
if (disp_ready) update_display();
#endif
update_modem_status(); // TODO: Remove debug
#if HAS_PMU
if (pmu_ready) update_pmu();
#endif
update_modem_status(); // TODO: Remove debug
#if HAS_BLUETOOTH || HAS_BLE == true
if (!console_active && bt_ready) update_bt();
#endif
update_modem_status(); // TODO: Remove debug
#if HAS_INPUT
input_read();
#endif
update_modem_status(); // TODO: Remove debug
if (memory_low) {
#if PLATFORM == PLATFORM_ESP32
if (esp_get_free_heap_size() < 8192) {

37
Utilities.h
View File

@ -859,6 +859,17 @@ void kiss_indicate_channel_stats() {
#endif
}
void kiss_indicate_csma_stats() {
#if MCU_VARIANT == MCU_ESP32
serial_write(FEND);
serial_write(CMD_STAT_CSMA);
escaped_serial_write(cw_band);
escaped_serial_write(cw_min);
escaped_serial_write(cw_max);
serial_write(FEND);
#endif
}
void kiss_indicate_phy_stats() {
#if MCU_VARIANT == MCU_ESP32
uint16_t lst = (uint16_t)(lora_symbol_time_ms*1000);
@ -866,18 +877,15 @@ void kiss_indicate_phy_stats() {
uint16_t prs = (uint16_t)(lora_preamble_symbols);
uint16_t prt = (uint16_t)(lora_preamble_time_ms);
uint16_t cst = (uint16_t)(csma_slot_ms);
uint16_t dft = (uint16_t)(difs_ms);
serial_write(FEND);
serial_write(CMD_STAT_PHYPRM);
escaped_serial_write(lst>>8);
escaped_serial_write(lst);
escaped_serial_write(lsr>>8);
escaped_serial_write(lsr);
escaped_serial_write(prs>>8);
escaped_serial_write(prs);
escaped_serial_write(prt>>8);
escaped_serial_write(prt);
escaped_serial_write(cst>>8);
escaped_serial_write(cst);
escaped_serial_write(lst>>8); escaped_serial_write(lst);
escaped_serial_write(lsr>>8); escaped_serial_write(lsr);
escaped_serial_write(prs>>8); escaped_serial_write(prs);
escaped_serial_write(prt>>8); escaped_serial_write(prt);
escaped_serial_write(cst>>8); escaped_serial_write(cst);
escaped_serial_write(dft>>8); escaped_serial_write(dft);
serial_write(FEND);
#endif
}
@ -1086,7 +1094,8 @@ void setPreamble() {
void updateBitrate() {
#if MCU_VARIANT == MCU_ESP32 || MCU_VARIANT == MCU_NRF52
if (radio_online) {
if (!radio_online) { lora_bitrate = 0; }
else {
lora_symbol_rate = (float)lora_bw/(float)(pow(2, lora_sf));
lora_symbol_time_ms = (1.0/lora_symbol_rate)*1000.0;
lora_bitrate = (uint32_t)(lora_sf * ( (4.0/(float)lora_cr) / ((float)(pow(2, lora_sf))/((float)lora_bw/1000.0)) ) * 1000.0);
@ -1095,17 +1104,15 @@ void updateBitrate() {
csma_slot_ms = lora_symbol_time_ms*CSMA_SLOT_SYMBOLS;
if (csma_slot_ms > CSMA_SLOT_MAX_MS) { csma_slot_ms = CSMA_SLOT_MAX_MS; }
if (csma_slot_ms < CSMA_SLOT_MIN_MS) { csma_slot_ms = CSMA_SLOT_MIN_MS; }
difs_ms = CSMA_SIFS_MS + 2*csma_slot_ms;
float target_preamble_symbols = LORA_PREAMBLE_TARGET_MS/lora_symbol_time_ms;
if (target_preamble_symbols < LORA_PREAMBLE_SYMBOLS_MIN) { target_preamble_symbols = LORA_PREAMBLE_SYMBOLS_MIN; }
else { target_preamble_symbols = (ceil)(target_preamble_symbols); }
lora_preamble_symbols = (long)target_preamble_symbols;
setPreamble();
lora_preamble_symbols = (long)target_preamble_symbols; setPreamble();
lora_preamble_time_ms = (ceil)(lora_preamble_symbols * lora_symbol_time_ms);
lora_header_time_ms = (ceil)(PHY_HEADER_LORA_SYMBOLS * lora_symbol_time_ms);
} else {
lora_bitrate = 0;
}
#endif
}