[srslte-users] what is the mean of TX_DELAY and FDD_HARQ_DELAY_MS

[john wu]

#define TX_DELAY 4
#define MSG3_DELAY_MS 2 // Delay added to TX_DELAY
#define TTI_SUB(a, b) ((((a) + 10240) - (b)) % 10240)
#define TTI_TX(tti) ((tti + TX_DELAY) % 10240)// Use only in FDD mode!!
#define FDD_HARQ_DELAY_MS 4
#define TTI_RX(tti) (TTI_SUB(tti, FDD_HARQ_DELAY_MS))
#define TTI_RX_ACK(tti) ((tti + (2 * FDD_HARQ_DELAY_MS)) % 10240)

the definition is above. i want to know what TX_DELAY and FDD_HARQ_DELAY_MS means. FDD_HARQ_DELAY_MS is easier to understand it is the ack time delay from TX to ack. but TX_DELAY seems the time advance to transmit the data to the radio hardware, it that correct.



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Best Regards
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