AVG_PKT_SIZE
#define MCS_NBITS (AVG_PKT_SIZE << 3)
duration /= AVG_PKT_SIZE;
duration /= AVG_PKT_SIZE;
(8 * (AVG_PKT_SIZE + 4) * 10) / (_bitrate)))
4 * (((16 + 80 * (AVG_PKT_SIZE + 4) + 6) / \
tp_avg = tp_avg * AVG_PKT_SIZE * 8 / 1024;
#define MCS_NBITS ((AVG_PKT_SIZE * AVG_AMPDU_SIZE) << 3)