Patent ID: 6178330
Filing Date: 2001-01-23
Classification: H04L,H04W

Abstract:
A point-to-multipoint radio transmission system, comprising:a central station utilizing a first set of transmission channels and including at least one central station modem for each channel of the first set of the transmission channels;subscriber stations utilizing a second set of transmission channels, each of the subscriber stations including at least one subscriber modem, each respective modem of the station and subscriber modems including a first number of transmitting channels and a second number of receiving channels, each of the first and second numbers being greater than one, the respective modem transmitting at least one signal via a maximum of a third number of the transmitting channels or via a maximum of a fourth number of the receiving channels, the third number being less than the first number by one, the fourth number being less than the second number by one; anda control device adjusting, for each of the station and subscriber modems and when a change occurs in at least one of the transmission channels and a predetermined interference resistance of the transmission channels, at least one of:a fifth number of first active channels of the transmitting channels,a sixth number of second active channels of the receiving channels, andat least one of a plurality of transmission parameters of at least one of the first activechannels and the second active channels, the fifth number being between one and the third number, the sixth number being between one and the fourth number, the control device performing an adjustment at least one of to optimally utilize a bandwidth of an available radio frequency channel and to achieve the predetermined interference resistance in the transmission channels, the plurality of transmission parameters including at least one of a channel carrier frequency, a data rate, a modulation, a coding, a transmission level and signal quality evaluation parameters,wherein, when the plurality of transmission parameters are changed,the control device adjusts further transmission parameters in a non-operating channel of the transmitting or receiving channels, while the at least one signal is transmitted via at least one other channel of the transmitting channels or of the receiving channels, and the control device prevents a switchover to the non-operating channel until further transmission channels are acquired.