Modular expandable digital single-stage switching network in atm (asynchronous transfer mode) technology for a fast packet-switched transmission of information

Abstract

Abstract A modular expandable digital single-stage switching network in ATM (Asynchronous Transfer Mode) technology for a fast packet-switched transmission of information, having a single type of switching module with storage function, which can be operated in two different operating modes (M1, M2) as a pre-switching module or as a final switching module, and has N first inputs, N expansion inputs, N first outputs and N expansion outputs. A first operating mode (M1) realizes the function of the switching module as the final switching module for the switching of N first input lines and N expansion input lines to N first output lines, and a second operating mode (M2) realizes the function of the switching module as the pre-switching module for the pre-switching of N first input lines and for connecting through N expansion input lines. The switching module functioning as the pre-switching module can read in 2N packets simultaneously and read out N packets simultaneously. The switching module functioning as the pre-switching module processes with its header information filter only a part of the header information of data packets for switching the packets to the respective switching matrix column, so that the lines of the matrix column are shared by packets for this matrix column. To avoid so-called packet overtaking, the chronological sequence of packets arriving in each case on one of the N first input lines of the switching module functioning as pre-switching module is replaced from case to case by a spatial ordering on the N first output lines of the switching module functioning as pre-switching module. The switching module functioning as final switching module can read in 2N packets simultaneously. The switching module functioning as the final switching module processes with its header information filter another part of the header information for the final switching to a matrix output.

Inventors

• 👤 Manfred Lobjinski
• 👤 Michael Horn
• 👤 Christian Hinterberger

Bibliographic Details