초록 ▼

This invention relates to duplex and to half duplex transmission schemes and more particularly to the application of such schemes in TDMA and other multiple access environments. In accordance with a first aspect of the invention, there is provided a method of multiplexing signals transmitted by a nu

This invention relates to duplex and to half duplex transmission schemes and more particularly to the application of such schemes in TDMA and other multiple access environments. In accordance with a first aspect of the invention, there is provided a method of multiplexing signals transmitted by a number of terminals onto a communications link; the link having a capacity less than the total capacity of the terminals; the method including the step of varying the rate of encoding of said signals transmitted by said terminals whereby the bandwidth o the transmitted signals corresponds to the portions allocated to the terminals. In accordance with another aspect of the invention, there is provided a system for the communication of signals in real time over a channel; said system adapted to vary the bandwidth of at least one signal such that the number of signals multiplexed onto said channel can be dynamically varied.

대표청구항 ▼

[ What is claimed is:] [1.] A method of multiplexing signals transmitted by a number of terminals onto a communications link; the bandwidth of the terminals exceeding the capacity of the link; the method comprising the steps of:i) monitoring the link for the occurrence of simultaneous transmission o

[ What is claimed is:] [1.] A method of multiplexing signals transmitted by a number of terminals onto a communications link; the bandwidth of the terminals exceeding the capacity of the link; the method comprising the steps of:i) monitoring the link for the occurrence of simultaneous transmission of signals over the link by two or more terminals;ii) assigning portions of the link capacity to the transmitting terminals; the sum of said portions being equal to or less than the capacity of the link;iii) varying an encoding rate of said signals transmitted by said terminals; andiv) varying a form of encoding, wherein said signals are digitally encoded; said bandwidth being varied by varying the rate of encoding; and wherein said signals are voice band signals and said encoding may be one of Adaptive Differential Pulse Code Modulation (ADPCM), Linear Predictive Coding (LPC), Adaptive Predictive Coding (APC), Multiple Excitation Linear Predictive Coding (MPC-LPC); whereby the bandwidth of the transmitted signals corresponds to the portions assigned to the terminals.