Frequency channel selection in a data transmission method which uses a frequency hopping method

1. Method for selecting frequency channels in a cordless communication system by a data transmission method that uses a frequency hopping method, comprising:

determining an existence of interference on a frequency channel, comprising:

(a) incrementing a counter each time an erroneous transmission on the frequency channel is identified;

(b) decrementing the counter each time an error-free transmission on the frequency channel is identified;

repeating the acts of (a) and (b) until the counter exceeds a maximum count; and

eliminating the frequency channel from a frequency hopping sequence when the counter exceeds the maximum count;

reinserting the frequency channel into the frequency hopping sequence, comprising:

(c) decrementing the counter each time an error free transmission on the frequency channel is identified;

(d) setting the counter to the maximum count each time an erroneous transmission on the frequency channel is identified;

repeating acts (c) and (d) until the counter reaches a minimum count; and

reinserting the frequency channel into the frequency hopping sequence when the counter has reached the minimum count.

2. The method of claim 1 , wherein detecting an erroneous transmission further comprises using checksums that are added to block-transmitted data at an end thereof.

3. The method of claim 2 , wherein using checksums comprises adding a CRC (Cyclic Redundancy Check) code to each data block at the end thereof.

4. A method for data transmission between at least two stations via radio links using the frequency hopping method and the frequency channel selection method of claim 1 .

5. The method of claim 4 wherein the method is based on one of the transmission standards Bluetooth, WDCT, DECT or HomeRF.

6. The method of claim 1 , wherein re-inserting the frequency channel further comprises:

measuring an interference signal strength associated with the frequency channel; and

determining that interference no longer exists on the frequency channel when the measured interference signal strength is less than a predetermined amount.

7. The method of claim 6 , wherein determining that interference no longer exists further comprises:

decrementing a counter when the measured signal strength is less than a predetermined threshold;

comparing a count of the counter to a predetermined value; and

determining that interference no longer exists when the count is less than or equal to the predetermined value.