- u64 sample_delivered; /**< Delivered of sample used for rate */
- u32 delivered; /**< Bytes delivered in ack time */
- f64 ack_time; /**< Time to ack the bytes delivered */
+ u64 prior_delivered; /**< Delivered of sample used for rate, i.e.,
+ total bytes delivered at prior_time */
+ f64 prior_time; /**< Delivered time of sample used for rate */
+ f64 interval_time; /**< Time to ack the bytes delivered */
+ f64 rtt_time; /**< RTT for sample */