CHANNEL HOPPING IN A RADIO COMMUNICATIONS SYSTEM

摘要

PURPOSE: A channel hopping device for mobile stations and a base station is provided to solve the problem of how channels shall be allocated to the different connections between a base station and mobile stations that are located within the area covered by the base station. CONSTITUTION: A channel allocation(211) within the base station (BS1) generates channel hopping sequences that are transmitted via a control channel (SACCH) to hopping sequence lists(204-206) in the mobile stations (MS1-MS3). The hopping sequences are also transmitted to corresponding hopping sequence lists(201-203) in the base station (BS1). A channel hopping sequence is divided into a number of sequence intervals corresponding to the time between two adjacent channel hops within a channel hopping sequence. In the channel allocation(211) the attenuation of the connections (F1-F3) and the interference of the channels are continuously being observed within each sequence interval. The channel allocation(211) generates channel hopping sequences according to the principle that a connection that has poor connection quality will be allocated a channel hopping sequence with channels of high channel quality and connections with successively better connection quality are allocated channel hopping sequence having successively poorer channels.