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Channel hopping in a radio communications system

  • US 6,298,081 B1
  • Filed: 05/30/1997
  • Issued: 10/02/2001
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Term
First Claim
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1. 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 (Ti) that together constitute the time taken to run through a channel hopping sequence;

    generating a signal attenuation parameter (δ

    ) for each of the respective connections (F1-F3);

    generating a channel quality parameter (I,C/I,BER) within each of the respective sequence intervals (Ti) for frequencies (f1-f6) that are used in the radio communications system, and for different generating intervals (Δ

    Tk), wherein a generating interval (Δ

    Tk) includes the duration of the whole of a sequence interval (Ti) 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 (Ti), 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 (δ

    ); and

    channel 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).

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