Configuration parameters for new CSMA scheme

Config.h

@@ -70,9 +70,8 @@
 	#define PHY_HEADER_LORA_SYMBOLS    20
 	#define PHY_CRC_LORA_BITS          16
 	#define LORA_PREAMBLE_SYMBOLS_MIN  18
-	#define LORA_PREAMBLE_TARGET_MS   15
-	#define LORA_CAD_SYMBOLS          3
-	long lora_preamble_symbols      = 12;
+	#define LORA_PREAMBLE_TARGET_MS    24
+	long lora_preamble_symbols      =  LORA_PREAMBLE_SYMBOLS_MIN;
 	long lora_preamble_time_ms      =  0;
 	long lora_header_time_ms        =  0;
 	float lora_symbol_time_ms       =  0.0;
@@ -81,20 +80,26 @@
 	bool lora_low_datarate          =  false;
 
 	// CSMA Parameters
+	#define CSMA_SIFS_MS               0
 	#define CSMA_POST_TX_YIELD_SLOTS   3
 	#define CSMA_SLOT_MAX_MS           100
 	#define CSMA_SLOT_MIN_MS           24
 	#define CSMA_SLOT_SYMBOLS          12
+	#define CSMA_CW_BANDS              4
 	#define CSMA_CW_MIN                0
-	#define CSMA_CW_MAX               15
-	#define CSMA_SIFS_MS              0
+	#define CSMA_CW_PER_BAND_WINDOWS   15
+	#define CSMA_BAND_1_MAX_AIRTIME    6
+	#define CSMA_BAND_N_MIN_AIRTIME    85
 	int csma_slot_ms                =  CSMA_SLOT_MIN_MS;
-	long difs_ms                    = CSMA_SIFS_MS + 2*csma_slot_ms; // Distributed interframe space
+	long difs_ms                    =  CSMA_SIFS_MS + 2*csma_slot_ms;
 	long difs_wait_start            = -1;
 	long cw_wait_start              = -1;
 	long cw_wait_target             = -1;
 	long cw_wait_passed             =  0;
 	int csma_cw                     = -1;
+	uint8_t cw_band                 =  1;
+	uint8_t cw_min                  =  0;
+	uint8_t cw_max                  =  CSMA_CW_PER_BAND_WINDOWS;
 
 	// LoRa settings
 	int  lora_sf   	                =  0;