Architecture for lightweight signaling in ATM networks

• US 6,243,387 B1
• Filed: 10/24/2000
• Issued: 06/05/2001
• Est. Priority Date: 01/31/1997
• Status: Expired due to Term

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Hjalmtysson, Gisli, Ramakrishnan, Kadangode K.
• Primary Examiner(s): Patel, Ajit
• Application Number:
  US09/633,112
• Time in Patent Office: 224 Days
• Field of Search: 370/395, 370/410, 370/396, 370/412, 370/428, 370/429, 370/522, 370/524, 370/397, 370/384, 370/385
• US Class Current: 370/410
• CPC Class Codes: H04L 2012/5619 Network Node Interface, e.g. tandem connections, transit switching
• CPC Class Codes: H04L 2012/563 Signalling, e.g. protocols, reference model
• CPC Class Codes: H04L 2012/5638 Services, e.g. multimedia, GOS, QOS
• CPC Class Codes: H04L 2012/5642 Multicast/broadcast/point-multipoint, e.g. VOD
• CPC Class Codes: H04L 2012/5667 IP over ATM
• CPC Class Codes: H04L 49/3081 ATM peripheral units, e.g. policing, insertion or extraction
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

A method and system provide for a network using lightweight signaling for establishing connections. The method and system establish a best efforts connection between at least two terminals, on a hop-by-hop basis. Data can flow before and quality of service is established. The system enhances processing time for quality of service requirements and provides flexibility in establishing multicast connections.

Claims

1. A method for expediting data flow from a first point to a second point via a connection defined by a first set-up from the first point to an intermediate station, and a second set-up from the intermediate station to the second point, each set-up being established upon receipt of a connection acknowledgment corresponding to a connection request, the method comprising:

receiving a first connection request at the intermediate station, the first connection request having been transmitted from the first point;

transmitting, from the intermediate station toward the second point, a second connection request;

transmitting a first connection acknowledgment from the intermediate station toward the first point in response to the first connection request, to establish the first set-up, the first connection acknowledgment being transmitted prior to receiving a second connection acknowledgment corresponding to the second connection request;

receiving data at the intermediate station, via the first set-up, prior to establishing the second set-up;

storing the received data at the intermediate station; and

forwarding the stored data from the intermediate station toward the second point after establishing the second set-up.

2. In a packet data network a method for setting up a call between a first station and a second station via a plurality of hops and intermediate nodes, the method comprising the steps of

receiving a connectivity request from a first station at a first node over a first hop;

transmitting a connection acknowledgment from the first node toward the first station over the first hop;

transmitting a second connectivity request from the first node over a second hop to a second node;

transmitting a third connectivity request from the second node over a third hop;

transmitting a second connectivity acknowledgment from the second node to the first node over the second hop; and

sending data from the first station toward the second station over the first hop before the second connectivity acknowledgment is received at the first node.

3. The method of claim 2, further comprising receiving data from the first station at the first node over the first hop;

and

transmitting the received data to the second node over the second hop prior to the second node receiving a connectivity acknowledgment via the third hop.

4. A method for setting up a call between two points comprising the steps of:

receiving a first call connection request at a node;

transmitting a second call connection request from the node in response to receipt of the first call connection request;

transmitting toward a first of the points an acknowledgment of the first call connection request before establishing a connection between the node and a second of the points; and

sending data from the first of the points to the node before establishing a connection between the node and the second of the points.

5. The method of claim 4, further comprising establishing a connection between the first of the points and the node.

6. The method of claim 4, further comprising establishing a connection between the node and the second of the points.

7. The method of claim 4, further comprising setting service parameters for the call using an established connection.

8. The method of claim 4, further comprising setting service parameters for an established connection.

9. The method of claim 4, further comprising setting service parameters for a first established connection and for a second established connection, the service parameters for the first established connection differing from the service parameters for the second established connection.

10. The method of claim 4, further comprising setting service parameters for the call using an established connection, comprising the substeps of:

receiving at the node, via a connection, a request for a selected quality of service;

processing the quality of service request to determine whether the request can be satisfied; and

setting at least one transmission parameter for the call based on the results of said step of processing.

11. The method of claim 4, further comprising setting service parameters for the call using an established connection, comprising the substeps of:

receiving at the node, from a calling party, a request for a selected quality of service;

processing the quality of service request to determine whether the request can be satisfied; and

setting at least one transmission parameter for the call based on the results of said step of processing.

12. The method of claim 4, further comprising setting service parameters for the call using an established connection, comprising the substeps of:

receiving at the node, from a called party, a request for a selected quality of service;

processing the quality of service request to determine whether the request can be satisfied; and

setting at least one transmission parameter for the call based on the results of said step of processing.