High speed packet switching controller for telephone switching system

• US 6,421,341 B1
• Filed: 10/15/1998
• Issued: 07/16/2002
• Est. Priority Date: 10/16/1997
• Status: Expired due to Term

• Current Assignee: Korea Telecommunication Authority
• Original Assignee: Korea Telecommunication Authority
• Inventors: Han, Il Song, Choi, Young Jae, Kim, Dae Hwan
• Primary Examiner(s): Vincent, David
• Assistant Examiner(s): Boakye, Alexander O.
• Application Number:
  US09/173,018
• Time in Patent Office: 1,370 Days
• Field of Search: 370/360, 370/355, 370/356, 370/383, 370/387, 370/416, 370/409, 340/825.79, 340/825.9, 340/825.93, 726/33, 706/15, 706/16, 706/20, 706/22, 706/31, 706/33, 706/36, 706/37
• US Class Current: 370/360
• CPC Class Codes: H04L 2012/5686 Use of neural networks
• CPC Class Codes: H04L 49/101 using crossbar or matrix

Abstract

This invention relates to a high speed packet switching controller in a telephone switching system which can suitably be applied to a packet controller having large capacity using a neural network chip and maximize the system performance by the optimized switching operation. The high speed packet switching controller comprises a row address decoder for decoding a weight raw address which is inputted thereto, a column address decoder for decoding a weight column address which is inputted thereto, a matrix array for providing the neural network using address signals provided from the row address decoder and column address decoder and outputing varied voltage in accordance with an external weight value, a neural network for producing a final crossbar switching control signal, an external input/output bus for transmitting an output signal of the neural network, and an internal neural data bus for transmitting the address signal output from the row address decoder and column address decoder to the matrix array.

Claims

1. A high speed packet switching controller comprising:

a row address decoder for decoding a weight row address which is inputted thereto;

a column address decoder for decoding a weight column address which is inputted thereto;

a matrix array for outputting varied voltage in accordance with an external weight value in accordance with weight row address and column address signals;

a neural network for producing a final crossbar switching control signal; and

a internal neural data bus for transmitting said weight row address and column address signals;

wherein said neural network comprises;

a matrix ring part for varying output voltage in accordance with an input weight value; and

at least a non-linear amplifier for amplifying an output signal of said matrix ring part.

2. The switching controller of claim 1, wherein said matrix array comprises:

a first current mirror for repeating a current magnitude formed from an input branch to another branch as its magnitude;

a first P-MOS transistor with gate terminal receiving an external voltage and other terminals being connected to the first current mirror; and

a first N-MOS transistor with source terminal connect5ed to a common line formed between said first P-MOS transistor and said first N-MOS transistor for switching on/off according to an input neural value which is inputted to a gate terminal of said first N-MOS transistor.

3. The switching controller of claim 2, wherein said first current mirror comprises a second N-MOS transistor with gate terminal receiving the weight value, a third N-MOS transistor with source terminal being connected to a drain terminal of said first N-MOS transistor, a fourth N-MOS transistor with drain terminal being connected to a source terminal of said second N-MOS transistor, and a fifth N-MOS transistor with gate terminal common-connected to a gate terminal of said fifth N-MOS transistor.

4. The switching controller of claim 1, wherein said non-linear amplifier comprises:

a second current mirror for repeating a current magnitude formed from an input branch to another branch as its magnitude;

a second P-MOS transistor with drain and source terminals connected to said second current mirror; and

a sixth N-MOS transistor with drain terminal connected to the source terminal of said second P-MOS transistor.

5. The switching controller of claim 4, wherein said second current mirror comprises:

a seventh N-MOS transistor with drain terminal connected to one side of said capacitor;

an eighth N-MOS transistor with drain terminal connected to a source terminal of said seventh N-MOS transistor;

a ninth N-MOS transistor with gate terminal connected to said one side of said capacitor; and

a third P-MOS transistor with source terminal connected to a drain terminal of said ninth N-MOS transistor.