Patent ID: 6298081
Filing Date: 2001-10-02
Classification: H04W

Abstract:
A method of channel hopping in accordance with a channel hopping sequence in a radio communications system having at least one first radio station (BS1) and at least one second radio station (MS1-MS3) with information being transmitted between said at least one first and said at least one second radio station on a plurality of connections (F1-F3), said connections being subjected to signal attenuation and interference, wherein the method comprises the steps of:dividing the channel hopping sequences into sequence intervals (T.sub.i) that together constitute the time taken to run through a channel hopping sequence;generating a signal attenuation parameter (.delta.) for each of the respective connections (F1-F3);generating a channel quality parameter (I,C/I,BER) within each of the respective sequence intervals (T.sub.i) for frequencies (f1-f6) that are used in the radio communications system, and for different generating intervals (.DELTA.T.sub.k), wherein a generating interval (.DELTA.T.sub.k) includes the duration of the whole of a sequence interval (T.sub.i) or for parts of said sequence interval;generating at least one channel hopping sequence, wherein a channel hopping sequence includes one channel for each sequence interval (T.sub.i), wherein a connection hops between said channels, and wherein said at least one channel hopping sequence is generated in accordance with the generated values of the channel quality parameter (I,C/I,BER);allocating the channel hopping sequences to a respective connection, wherein said allocation is effected in accordance with the generated values of the channel quality parameter (I,C/I,BER) for each of the sequence intervals of the channels included in the hopping sequences and in accordance with the signal attenuation parameter (.delta.); andchannel hopping between the channels included in the channel hopping sequences in radio communication on the connections between the first radio station (BS1) and said second radio stations (MS1-MS3).