Patent Number: 6,298,081

Title: Channel hopping in a radio communications system

Abstract: The invention relates to a method and apparatus for channel hopping between mobile stations (MS1-MS3) and a base station (BS1) in a radio communications system. A channel allocation means (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 (T.sub.i) corresponding to the time between two adjacent channel hops within a channel hopping sequence. In the channel allocation means (211) the attenuation (.delta.) of the connections (F1-F3) and the interference (I(channel,t)) of the channels are continuously being observed within each sequence interval (T.sub.i). The channel allocation means (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.

Inventors: Almgren; Knut Magnus (Sollentuna, SE), Persson; Yngve Bengt (Djursholm, SE), Olofsson; H.ang.kan Gunnar (Stockholm, SE)

Assignee: Telefonaktiebolaget LM Ericsson (Publ)

International Classification: H04Q 7/38 (20060101); H04B 015/00 ()

Expiration Date: 10/02/2018