Patent ID: 6947426
Filing Date: 2005-09-20
Classification: H04L,H04Q

Abstract:
1. A communication control system that controls multiplex communication in the form of fixed-length cells, said communication control system comprising: a common cell buffer assembly that stores therein cells of the multiplex communication; and a buffer management unit that controls a process of reading a cell from said cell buffer assembly and a process of writing a cell into said cell buffer assembly, thus controlling communication between a large number of input-output ports and a multiplex communication network, wherein said buffer management unit comprises: a cell discard controller that discards a cell stored in said cell buffer assembly when a time period of not shorter than a preset discard reference time has elapsed since storage of the cell into said cell buffer assembly; and a writing time management unit that maps each cell to a writing time of the cell and manages the mapping, and said cell discard controller discards a cell, based on an elapsed time since the writing time of the cell.