Patent ID: 6549537
Filing Date: 2003-04-15
Classification: H04L,H04Q

Abstract:
A communication system for outputting a first data to be real-time transmitted and a second data to be nonreal-time transmitted, comprising:means for generating a real-time Asynchronous Transfer Mode (ATM) cell for outputting the first data; means for generating a nonreal-time ATM cell for outputting the second data; selecting means for selecting either the real-time or nonreal-time ATM cell as a preferential cell; controlling means for controlling the selecting means to select the real-time ATM cell as the preferential cell; nonreal-time ATM cell stacking means for stacking nonreal-time ATM cell data in a memory; and flag storing means for storing a flag indicating that the nonreal-time ATM cells are stacked in said memory; wherein said controlling means is adapted to have the nonreal-time ATM cell stacking means stack the nonreal-time ATM cells in said memory and to have the flag storing means store the flag in said flag storing means when a real-time ATM cell output timing is generally the same as a nonreal-time ATM cell output timing; and wherein the controlling means is adapted to check, at a time other than the output time of a real-time ATM cell, if a flag is stored in the flag storing means and wherein said controlling means controls said selecting means to output a nonreal-time ATM cell stacked in said memory when a flag is judged to be stored in the flag storing means.