364 ◾ Mobile Ad Hoc Networks: Current Status and Future Trends
t P
T P P
( )
max{ , ( )},
,
=
− >
∞
0 1 0
otherwise
(13.14)
where P is the progress function depending on the positions of the last forwarder F, of the final
destination node D of the packet, and of the receiving node N. e Euclidean distance between
two positions is expressed as dist( ). r
radio
denotes the maximum 1-hop distance toward the des-
tination a message can travel and T defines the maximum contention time. t(P) is the assigned
waiting time to a node. Observe that CBF does not take into account the role of traffic density
in the progress function P. is leads to actual forwarding progress to be less than the amount of
progress estimated by (13.13). However, as CBF takes