The frequency hopping pattern of a first wireless communication device is modified
such that each transmission (73) to a second wireless communication device
is on a frequency (MSj+1) that the second device's normal frequency
hopping pattern specifies for one of the second device's next several transmissions
to the first device. This permits the second device to make quality measurements
(54) on a frequency that the second device will soon use (51) for
transmission to the first device.