System for inter packet community communication

• US 5,363,369 A
• Filed: 03/31/1993
• Issued: 11/08/1994
• Est. Priority Date: 03/31/1993
• Status: Expired due to Term

• Current Assignee: American Telephone & Telegraph Company (AT&T, Inc.)
• Original Assignee: AT&T, Inc.
• Inventors: Reilly, Craig P., Romy, Neil J., Spanke, Ronald A., Hemmady, Jayant G.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): BLUM, RUSSELL
• Application Number:
  US08/040,818
• Time in Patent Office: 587 Days
• Field of Search: 370/79, 370/85.13, 370/85.14, 370/60, 370/94.1, 379/59, 379/60, 455/33.1, 455/33.2
• US Class Current: 370/392
• CPC Class Codes: H04J 2203/0039 Topology
• CPC Class Codes: H04L 2012/5607 Radio
• CPC Class Codes: H04L 2012/5619 Network Node Interface, e.g. tandem connections, transit switching
• CPC Class Codes: H04L 2012/5652 Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
• CPC Class Codes: H04L 49/107 using shared medium
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A system for delivering packetized data in a network comprising a plurality of packet switch communities, wherein each of the packet switch communities has a plurality of endpoints connected to a common packet switch and having a unique address, and wherein each of the endpoints has addresses unique to their respective packet switch community. The endpoints in this system add a two-part destination address to the packetized data to be sent, wherein the first field represents a packet switch community and the second represents a destination endpoint. Each packet switch community is responsive to the first field being different from its own address for delivering the packetized data to a switch. The switch is responsive to the first field for delivering the packetized data to a packet switch community identified by the first field. Finally, each endpoint in the destination packet switch community is responsive to the first and second address fields for accepting packetized data.

Claims

1. In a network comprising a plurality of packet switch communities, each of said packet switch communities having a plurality of endpoints connected to a means for transporting packets among said endpoints, each of said packet switch communities having a unique address and each of said endpoints in said packet switch communities having an address unique within its packet switch community, a connectionless system for delivering packetized data from one endpoint to another endpoint responsive to a destination address comprising a first field representing a packet switch community address and a second field representing a destination endpoint address within that packet switch community, said system comprising:

means at each of said endpoints for sending said packetized data to its transporting means, said packetized data including said destination address;

means at each of said packet switch communities responsive to said first field of said destination address for offering said packetized data to a switching means;

switching means responsive to said first field for delivering said packetized data to a packet switch community identified by said first field;

means at each of said packet switch communities for receiving said packetized data from said switching means and offering said packetized data to said endpoints; and

means at said endpoints responsive to said first and second address fields for accepting said packetized data, wherein only an endpoint in a packet switch community identified by said first address field having an address corresponding to said address in said second address field accepts said packetized data.

2. A system according to claim 1 wherein said switching means comprises a packet transport network.

3. A system according to claim 2 wherein said switching means comprises an asynchronous transport mode network.

4. A system according to claim 1 wherein said means for offering said packetized data to said switching means comprises one of said plurality of endpoints.

5. A system according to claim 1 wherein said means for offering said packetized data to said switching means includes means for encapsulating said packetized data into a form suitable for said switching means, and said means for receiving said packetized data from said switching means includes means for restoring said packetized data.

6. A system according to claim 1 wherein said means at each of said packet switch communities for offering said packetized data to said switching means includes addressing means for transforming said destination address into a network address.

7. A system according to claim 1 wherein said means at each of said packet switch communities responsive to said first field of said destination address is responsive to said first field being different from an address of its own packet community.

8. A system according to claim 1 wherein said means at each of said packet switch communities responsive to said first field of said destination address is responsive to said first field being the same as a preselected packet switch community addresses.

9. A system according to claim 1 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having an address corresponding to the address of its packet switch community when accepting packets from a different packet switch community, and responsive to said first field having a local address when accepting packets from its own packet switch community.

10. A system according to claim 1 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having a local address, and wherein said receiving means translates said address in said first field into said local address.

11. A system according to claim 1 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having a local address, and wherein said switching means translates said address in said first field into said local address.

12. A system according to claim 1 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having a local address, and wherein said offering means translates said address in said first field into said local address.

13. A system according to claim 1 wherein said endpoints at at least one of said packet switch community is adapted to interface with a digital cellular site.

14. In a network comprising a plurality of packet switch communities, each of said packet switch communities having a plurality of endpoints connected to a common packet switch, each of said packet switch communities having a unique address and each of said endpoints in said packet switch communities having an address unique within its packet switch community, a method for connectionlessly delivering packetized data from a source endpoint to a destination endpoint, said packetized data having a destination address comprising a first field representing a packet switch community and a second field representing a destination endpoint address within that packet switch community, said method comprising the steps of:

said source endpoint sending said packetized data into a packet community of said source endpoint;

an interface endpoint at said packet switch community of said source responsive to said first field being different from an address of the packet community of said source delivering said packetized data to a switching means;

said switching means responsive to said first field delivering said packetized data to a packet switch community identified by said first field; and

an endpoint identified by said second field at said packet switch community identified by said first field receiving said packetized data from said switching means.

15. A method according to claim 14 wherein said step of delivering said packetized data to a packet switch community identified by said first field comprises:

encapsulating said packetized data into a form for transport on said switching means;

translating said first field of said destination address into a form recognized by said switching means; and

restoring said packetized data by said endpoint at said packet switch community identified by said first field.

16. A system for conveying packetized data from a first switching system to a second switching system, said first and second switching systems connected to a telephone network, said system comprising:

an asynchronous transfer mode network;

a first packet switch at said first switching system connected to said asynchronous transfer mode network, said first packet switch having a first packet bus, a first packet switch-to-asynchronous transfer mode interface connected to said first packet bus and to said asynchronous transfer mode network, and one or more sources for packet traffic connected to said first switching system; and

a second packet switch at said second switching system connected to said asynchronous transfer mode network, said second packet switch having a second packet bus, a second packet switch-to-asynchronous transfer mode interface connected to said second packet bus and to said asynchronous transfer mode network, and one or more destinations for packet traffic connected to said second switching system, whereby said first switching system may send information to said second switching system via said first and second packet switches and said asynchronous transfer mode network without affecting said telephone network.

17. A method of conveying packetized data from a first switching system to a second switching system, said first and second switching systems connected to a telephone network and to an ATM network, said method comprising the steps of:

said first switching system delivering packetized data to a first packet switch at said first switching system, said first packet switch having a packet bus, at least one connection from said first switching system and to said packet bus, and a packet switch-to ATM interface connected to said packet bus and to said ATM network;

said first packet switch receiving said packetized data, delivering it on said packet bus to said packet switch-to-ATM interface;

said packet switch-to-ATM interface segmenting said packetized data, encapsulating said segments with ATM protocol, and sending said segments into said ATM network as ATM cells;

said second switching system receiving said packetized data at a second packet switch, said second packet switch having a packet bus, at least one connection to said second switching system and to said packet bus, and a packet switch-to-ATM interface connected to said packet bus and to said ATM network;

said packet switch receiving said ATM cells from said ATM network at said packet switch-to-ATM interface, removing said ATM protocol, reassembling said segment into packetized data, and sending said packetized data on said packet bus; and

said connection receiving said packetized data from said packet bus and sending said data to said second switching system.

18. A system for delivering packetized data from a first switch to a second switch, said packetized data having an address, said system comprising:

means for receiving said packets in said first switch;

a packet switch in said first switch connected to said receiving means for transporting said packets;

first interface means responsive to said address of said packet for taking said packet from said packet switch and delivering said packet to an asynchronous transfer mode network;

second interface means at said second switch responsive to receipt of said packet from said asynchronous transfer mode network for putting said packet on a second packet switch;

destination means at said second switch connected to said packet switch responsive to said address of said packet for taking said packet from said second packet switch.

19. In a network comprising a plurality of packet switch communities, each of said packet switch communities having a plurality of endpoints connected to a common packet switch, each of said packet switch communities having a unique address and each of said endpoints in said packet switch communities having an address unique within its packet switch community, a system for connectionlessly delivering packetized data from one endpoint to another endpoint, said packetized data having a destination address comprising a first field representing a packet switch community address and a second field representing a destination endpoint address within that packet switch community, said system comprising:

means at said endpoints for sending said packets to their respective packet switch community;

means at a packet switch community responsive to said first field of said destination address for offering said packetized data to an interconnect means;

interconnect means for delivering said packetized data to a packet switch community identified by said first field;

means at said packet switch community identified by said first field for receiving said packetized data from said interconnect means and delivering said packetized data to said endpoints; and

means at said endpoints responsive to said first and second address fields for accepting said packetized data, wherein only an endpoint in a packet switch community having an address corresponding to said first address field and having an address corresponding to said address in said second address field accepts said packetized data.

20. A system according to claim 19 wherein said means at a packet switch community responsive to said first field for offering said packetized data to an interconnect means includes means responsive to said first field being identical to said address of said packet community of said destination endpoint for delivering said packetized data to said interconnect means.

21. A system according to claim 19 wherein said interconnect means comprises a direct connection between a packet community of a source and a packet community of a destination wherein said interconnect means receives packetized data from said source packet switch community responsive to said first field of said destination address being identical to said address of said packet community of said destination and delivers said packetized data to said destination packet community.

22. A system according to claim 21 wherein said direct connection comprises an asynchronous transfer mode link.

23. A system according to claim 19 wherein said means at a packet switch community for offering said packetized data to an interconnect means includes a plurality of means at said source packet switch community responsive to said first field of said destination address being identical to a prespecified packet switch community.

24. A system according to claim 23 wherein said interconnect means further includes a plurality of direct connections, each of said direct connections connecting each of a plurality of means at a source packet switch community responsive to said first field of said destination address being identical to a prespecified packet switch community with a specific destination packet switch community for receiving said packetized data from said source packet switch community and delivering said packetized data to said destination packet switch community.

25. A system according to claim 19 wherein said means for offering said packetized data to said interconnect means comprises one of said plurality of endpoints.

26. A system according to claim 19 wherein said means for offering said packetized data to said interconnect means includes means for encapsulating said packetized data into a form suitable for said interconnect means, and said means for receiving said packetized data from said interconnect means includes means for restoring said packetized data.

27. A system according to claim 19 wherein said means at said packet switch community for offering said packetized data to said interconnect means includes addressing means for transforming said destination address into a network address.

28. A system according to claim 19 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having an address corresponding to the address of its packet switch community when accepting packets from a different packet switch community, and responsive to said first field having a local address when accepting packets from its own packet switch community.

29. A system according to claim 19 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having a local address, and wherein said receiving means translates said address in said first field into said local address.

30. A system according to claim 19 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having a local address, and wherein said interconnect means translates said address in said first field into said local address.

31. A system according to claim 19 wherein said means at said endpoints for accepting said packetized data is responsive to said first field having a local address, and wherein said offering means translates said address in said first field into said local address.

32. A system according to claim 19 wherein said endpoints at at least one packet switch community is adapted to interface with a wireless system.