Patent ID: 7551594

Claim:
A method of allocating frequency subbands to a first device in a communication system, the method comprising: (a) determining whether a usage of an upper frequency subband of an ultrawide frequency band having a lower frequency subband and the upper frequency subband is necessary for a second device; and (b) if it is determined that the usage of the upper frequency subband is necessary for the second device and if a request for the usage of the upper frequency subband is received from the first device, denying usage of the upper frequency subband to the first device, wherein the ultrawide frequency band comprises a low frequency group of subbands including the lower frequency subband and a high frequency group of subbands including the upper frequency subband, wherein a plurality of devices in the communication system including the second device are respectively allocated a subband of the low frequency group of subbands, and wherein if the second device uses an allocated subband of the low frequency group of subbands according to a frequency hopping sequence and if the second device receives the request for the usage of the upper frequency subband from the first device, the second device allocates usage of the upper frequency subband to the first device and the first device uses the upper frequency subband according to the frequency hopping sequence used by the second device.