We consider the channel allocation problem, which is one of the most intere
sting problems in mobile radio systems. This problem is known to be NP-comp
lete and a couple of heuristic algorithms have been developed. In this pape
r, we convert the problem into a simpler form through the concept of patter
n, a set of cochannel cells. We suggest another algorithm based on simulate
d annealing for this simplified problem. The algorithm is applied into diff
erent benchmark problems that have appeared in the literature. The presente
d examples illustrate that our method works very well. Computational result
s using our formulation and simulated annealing algorithm are reported.