Figure 4 shows the inter-packet spacing for the reverse
path. Though not as significant a difference as in the forward
path case, a clear distinction between the inter-packet spacing
on the wired and wireless link is given. The reverse path
consists primarily of small packets (ACKS) which are less
frequent and more asynchronous, thus loosing some of the
desired characteristics. Therefore, the remaining of the CDFs
depict the traffic on the forward path due to its inherent
ability to present the traffic distinctions.