Patent ID: 6879603
Filing Date: 2005-04-12
Classification: H04Q

Abstract:
1. A method for performing a time slot interchange in a programmable device with a minimum of frame delay, the method comprising the steps of: accepting an input digital serial data stream through a serial port in the programmable device; buffering the input serial data stream in a first quantity of input buffers in the programmable device, wherein the digital data on the input serial data stream is grouped into frames of data having odd-numbered frames and even-numbered frames, and further wherein the first quantity of input buffers include odd input buffers for buffering the odd-numbered frames and even input buffers for buffering the even-numbered frames; transferring data from the input buffers-to second quantity of output buffers in the programmable device in a fashion which remaps the data in the input buffers into data in the output buffers to perform a time slot interchange; the first quantity of input buffers being greater in number than the second quantity of input buffers; and providing an output digital serial data stream from the output buffers through a serial port in the programmable device; wherein one of the input buffers is being emptied by the transfer of data to the output buffers while others of the input buffers are being filled from the input serial data stream accepted through the input serial port.