Patent ID: 6393002
Filing Date: 2002-05-21
Classification: H04B,H04J,H04L,H04W,Y02D

Abstract:
A digital telephone system for processing a plurality of information signals received in parallel over telephone lines from a public network exchange which are then transmitted in parallel over a plurality of radio frequency (RF) channels to a plurality of mobile subscriber units, each capable of receiving on any of those RF channels, comprising:an exchange switch handling the information signals received from said telephone lines as digital signal samples; signal compressors compressing the, digital signal samples received from the exchange switch and providing a corresponding compressed signal for each information signal; a multiplexer connected to the signal compressors sequentially combining a number of compressed signals into a single transmit channel bit stream corresponding to one of said RF channels, with each of the compressed signals occupying a sequential slot position in the transmit channel bit stream; a transmitter outputting a transmit channel signal for transmission to subscriber units over said one RF channel in response to the transmit channel bit stream, wherein the transmitter is capable of transmitting on any one among a plurality of RF channels available in the system, said one being selectively assignable within the system; said exchange switch connecting each received information signal to a respective compressor; and a remote-connection central processing unit responsive to a received connection request signal by providing an assignment signal indicating which one of the slots and RF channels is to be used for the respective information signal, wherein the central processing unit maintains a memory of which slots and which RF channels are so assigned and consults said memory upon receipt of the connection request signal and then provides the assignment signal that establishes the utilization of one of the slots at one of the RF channels that is not assigned to another information signal, and wherein the central processing unit communicates through said transmitter a control signal representative of the assigned time slot and RF channel to the subscriber unit to which the communication request is addressed.