FIELD: communication in cellular communication network. SUBSTANCE: when communication resource is allocated to communication unit, it starts continuous testing of fitness of signals of allocated communication resource and preliminary defined group of alternative communication resources. Station which is associated with allocated communication resource also checks fitness of signal of allocated communication resource. If communication unit or station detect unfitness of allocated communication resource signal, an alternative communication resource is chosen using calculated signal fitness in order to continue communication by communication unit. EFFECT: operative control of communication channel allocation using signal fitness of input and output communication lines. 7 cl, 4 dwg
