In a messaging system, message traffic is transmitted on one or more traffic channels T1, T2 and the allocation of groups S1, S2 of receivers to the traffic channels T1, T2 is controlled by information transmitted on a bulletin board channel BB. A predetermined number of frames before a change in the...http://www.google.fr/patents/US6600757?utm_source=gb-gplus-shareBrevet US6600757 - Paging channel control method and apparatus
