Apparatus for bridging non-compatible network architectures

• US 5,581,558 A
• Filed: 03/29/1995
• Issued: 12/03/1996
• Est. Priority Date: 03/29/1995
• Status: Expired due to Fees

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Zeidan, Dany M., McKenna, Gerald L., Horney, Lee F. II, Laird, Allan W.
• Primary Examiner(s): HSU, ALPUS
• Application Number:
  US08/412,822
• Time in Patent Office: 615 Days
• Field of Search: 370/60, 370/60.1, 370/61, 370/79, 370/85.13, 370/85.14, 370/94.1, 370/94.2, 370/94.3, 370/110.1, 395/200, 395/275, 395/325, 395/500, 395/650
• US Class Current: 370/401
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge

Abstract

A bridging apparatus facilitates communication between processors across networks having incompatible protocols and linking the processors. The bridging apparatus interfaces each processor to a respective incompatible network, and processes data in two-way communication across the interfaces for conversion from one incompatible protocol to another.

Claims

1. A bridging apparatus for bridging data arriving at an interface between first and second non-compatible communication networks, comprising:

a) a processor for processing said data arriving at said bridging apparatus in accordance with a set of processing instructions;

b) a memory in communication with said processor within which said set of processing instructions is stored;

c) a first port for transferring said data to/from a node of said first communication network in accordance with said processing instructions;

d) a second port for transferring said data to/from a node of said second communication network in accordance with said processing instructions;

e) a third port connected to one of the first and second non-compatible communication networks for asynchronously transferring said data to/from one of the first and second ports for transferring data to the communication network connected thereto in accordance with said processing instructions; and

f) a mode switch for controlling the transfer of data from the third port to one of the first and second ports.

2. The bridging apparatus of claim 1, further including a configuration switch for configuring the bridging apparatus as either a data terminal equipment (DTE) or a data communication equipment (DCE).

3. The bridging apparatus of claim 1, wherein said data arrive at said first port of said bridging apparatus and are processed for compatible transfer to/from one of said second and third ports.

4. The bridging apparatus of claim 1, wherein said data arrive at said second port of said bridging apparatus and are processed for compatible transfer to/from one of said first and third ports.

5. The bridging apparatus of claim 1, wherein said data arrive at the third port of said bridging apparatus and are processed for compatible transfer to/from one of said first and second ports.

6. The bridging apparatus of claim 1, wherein said first non-compatible communication network is a local area network.

7. The bridging apparatus of claim 1, wherein said second non-compatible communication network is a wide area network.

8. The bridging apparatus of claim 1, wherein said data must include one of a broadcast address associated with the second non-compatible communication network and a source processor address to enable capture of said data by said bridging apparatus.

9. The bridging apparatus of claim 8, wherein said data must include a destination service access point address to enable processing of said data by said bridging apparatus.

10. A system comprising:

first and second bridging apparatus for facilitating communication between a source processing terminal and a target processing terminal across a communication network that is not compatible with said terminals, each of the first and second bridging apparatus including;

means for asynchronously transferring data between the first and second bridging apparatus; and

a mode switch for controlling the routing of the asynchronous transferring of data to predetermined ports;

wherein said source and target processing terminals are connected, respectively, to said first and second bridging apparatus, such that said first bridging apparatus transfers data between said source processing terminal and said communication network and said second bridging apparatus transfers data between said communication network and said target processing terminal for facilitating packet assembler/disassembler and communication network bridging functionality.

11. The system of claim 10, wherein each of said first and second bridging apparatus includes means for terminating one of:

a) a wide area network connection to a wide area network (WAN);

b) a local area network connection to a local area network (LAN); and

c) a single asynchronous connection, said single asynchronous connection for use as one of;

i) an asynchronous interface control port;

ii) an asynchronous gateway to the LAN; and

iii) an asynchronous gateway to the WAN.

12. The system of claim 11, wherein each of said first and second bridging apparatus further includes means for coupling data to/from an asynchronous apparatus attached to the respective bridging apparatus via the single asynchronous connection.

13. The system of claim 11, wherein said communication network includes the WAN.

14. The system of claim 13, wherein the WAN operates according to an CCITT standard protocol.

15. The system of claim 10, wherein said source and target processing terminals are resident within local area networks connected to the communication network such that data are transferred from/to said first and second bridging apparatus to/from said source processing terminal and to/from said target processing terminal via said local area networks.

16. The system of claim 15, wherein each of said local area networks operates an IEEE 802.3 Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol.

17. The system of claim 10, wherein the source processing terminal includes a flexible control architecture which renders the source processing terminal extendable and remotable.

18. The system of claim 10, wherein each of said first and second bridging apparatus further includes a processor and a memory, and wherein said memory stores a set of instructions for execution by said processor to implement said bridging functionality.

19. The system of claim 10, wherein said source processing terminal includes means for analyzing and diagnosing systems processing operation of said target processing terminal.

20. The system of claim 19, wherein said source terminal is a general purpose computer and said target terminal is telecommunications equipment.

21. A communication apparatus comprising:

a network interface including;

a local area network (LAN) universal synchronous/asynchronous receiver/transmitter (USART) for interfacing with a LAN; and

a wide area network (WAN) USART for interfacing with a WAN;

an asynchronous USART for asynchronously interfacing with either the LAN or the WAN; and

a mode switch for controlling the interfacing of the asynchronous USART with one of the LAN or the WAN; and

means, connected to the network interface, for adjusting protocol differences within data streams passing through the network interface between one of;

(1) a first processing terminal and a node of the wide area network circuit;

(2) an asynchronous processing terminal and the node of said wide area network circuit; and

(3) the asynchronous terminal and said first processing terminal.

22. The communication apparatus of claim 21, wherein said means for adjusting includes a microprocessor and a memory, said memory including a set of microprocessor instructions for operating the microprocessor to control the means for adjusting.

23. The communication apparatus of claim 21, wherein said first processing terminal is resident within a local area network;

and

wherein the adjusting means reconciles protocol differences between said local area network and one of;

(1) said wide area network and (2) said asynchronous terminal.

24. An apparatus for bridging data arriving at an interface between incompatible communication networks, comprising:

a) a processor for receiving and processing the data;

b) a plurality of level converters, including first, second, and third level converters, for converting data signal levels of the received data to converted signal levels for processing by the processor;

c) a plurality of universal synchronous/asynchronous receiver/transmitters (USARTs) for interfacing with the first and second incompatible communication networks, including;

a first USART for interfacing with a local area network (LAN) of the incompatible communication networks through the first level converter;

a second USART for interfacing with a wide area network (WAN) of the incompatible communication networks through the second level converter; and

a third USART for asynchronously interfacing with either the LAN or the WAN for transferring the received data between incompatible communication networks.

25. The apparatus of claim 24 further including:

d) a mode switch for controlling the transfer of the received data from the third USART to one of the first USART and the second USART.