System and method for packet network trunking

• US 6,711,166 B1
• Filed: 12/10/1997
• Issued: 03/23/2004
• Est. Priority Date: 12/10/1997
• Status: Expired due to Term

• Current Assignee: RPX Corporation
• Original Assignee: RADVISION Limited (Avaya Incorporated)
• Inventors: Shemi, Amotz, Levin, Danny, Amir, Amos
• Primary Examiner(s): Yao, Kwang Bin
• Application Number:
  US08/987,972
• Time in Patent Office: 2,295 Days
• Field of Search: 370/352, 370/353, 370/354, 370/355, 370/356, 370/357, 370/360, 370/389, 370/392, 370/395, 370/400, 370/401, 370/402, 370/403, 370/404, 370/405, 370/535, 370/536, 370/537, 370/538, 370/540, 370/466, 370/467, 370/395.1, 370/395.2, 370/395.3, 370/395.31, 370/395.52
• US Class Current: 370/395.1
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04L 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04L 69/326 in the transport layer [OSI layer 4] H04L69/16 takes precedence
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

Concurrent calls are multiplexed over packet network connections such as TCP/UDP/IP connections. Initially, semi-permanent, open channels (e.g., TCP and/or UDP channels) are established between two or more packet switches. The switches format incoming calls, as necessary, and multiplex them onto the open channels. Identifiers may be added to the multiplexed calls to facilitate the demultiplexing of the calls by the receiving switch. The multiplexed calls are encapsulated into packet network protocol packets (e.g., TCP/IP or UDP/IP) for routing over a packet-based network (e.g., IP).

Claims

1. A method of routing data streams over a packet switched network, said method comprising:

receiving two or more data streams from at least two sources;

encapsulating call setup messages associated with said two or more data streams within at least one packet of a communication channel;

establishing said communication channel over the packet switched network using an open transport protocol;

transmitting at least a portion of said two or more data streams over said communication channel; and

maintaining said communication channel past a termination of any given one or more data streams.

2. The method of claim 1, further comprising associating each of said two or more data streams with an identifier.

3. The method of claim 1, wherein said termination further comprises permanently maintaining said communication channel.

4. The method of claim 1, wherein said packet switched network is an internet IP network.

5. A method according to claim 4, wherein said packet of said communication channel is a TCP/IP packet.

6. A method according to claim 4, wherein said packet of said communication channel is a UDP/IP packet.

7. The method of claim 1, wherein said packet network is over at least one of a wireless network, a wire-based network and a heterogeneous mesh network.

8. The method of claim 1, wherein packet network is over a lower level network that supports packet-based communications including at least one of an ATM network, an Ethernet-based network and a FDDI network.

9. A method according to claim 1, wherein said packet network is over an SCN that uses a packet transport protocol.

10. A method according to claim 1, wherein said establishing comprises establishing a communication channel between two internet protocol switches.

11. A method according to claim 1, wherein at least one of said two or more data streams is associated with a H.323 call.

12. A method according to claim 1, at least one of said two or more data streams is associated with a facsimile over internet protocol call, a telephone call, an H.324 call and an H.320 call.

13. A method according to claim 1 further including the steps of:

establishing a plurality of said communication channel over the packet switched network using an open transport protocol; and

multiplexing said two or more data streams over said plurality of communication channels.

28. A method according to claim 1, wherein at least one of said two or more data streams is associated with a voice over Internet protocol call.

14. A system for routing two or more data streams from two or more sources over a packet switched network, said system comprising:

an encapsulator for encapsulating call setup messages associated with said two or more data streams within at least one packet of a communication channel;

a trunk connection manager for establishing a said communication channel over the packet switched network using an open transport protocol;

wherein said trunk connection manager is adapted to maintain said communication channel past a termination of any given one or more data streams.

15. A system according to claim 14, further including an identifier generator for providing at least one identifier for each of said two or more data streams.

16. A system according to claim 14, wherein said trunk connection manager maintains a channel semi-permanent connection.

17. A system according to claim 14, wherein said packet switched network is an internet protocol network.

18. A system according to claim 14, wherein said packet switched network is over at least one of a wireless network, a wire-based network and a heterogeneous mesh network.

19. A system according to claim 14, wherein said packet switched network is over a lower level network that supports packet-based communications including at least one of an ATM network, an Ethernet-based network and a FDDI network.

20. A system according to claim 14, wherein said packet switched network is over an SCN that uses a packet transport protocol.

21. A system according to claim 14, wherein said communication channel is established between two internet protocol switches.

22. A system according to claim 14, wherein said open transport protocol is TCP.

23. A system according to claim 14, wherein said open transport protocol is UDP.

24. A system according to claim 14, wherein at least one of said two or more data streams is an H.323 call.

25. A system according to claim 14, wherein at least one of said two or more data streams is a voice over internet protocol call.

26. A system according to claim 14, wherein at least one of said two or more data streams is at least one of a facsimile over internet protocol call, a telephone call, an H.324 call and an H.320 call.

27. A system according to claim 14, further comprising a multiplexer;

wherein said call manager establishes a plurality of said communication channels over the packet switched network, and wherein said multiplexer is adapted to multiplex said calls over said plurality of said communication channels.