Packet pipe architecture for access networks

• US 6,747,986 B1
• Filed: 11/12/1999
• Issued: 06/08/2004
• Est. Priority Date: 11/25/1998
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Ronchetti, Luigi, Charas, Phillippe, Carli, Riccardo
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): JONES, PRENELL P
• Application Number:
  US09/438,225
• Time in Patent Office: 1,670 Days
• Field of Search: 370/465, 370/328-338, 370/389-398, 370/230-237, 370/349, 370/409-412, 370/503, 370/399, 370/469, 370/351, 370/431, 370/464, 370/236, 370/258, 370/252, 370/468, 370/440, 370/352, 709/226, 709/217, 709/230-235, 709/238, 710/305, 710/107-112, 710/171, 455/442, 455/436, 379/56.2
• US Class Current: 370/465
• CPC Class Codes: H04L 2012/5651 Priority, marking, classes
• CPC Class Codes: H04L 2012/5665 Interaction of ATM with other protocols
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

A packet pipe architecture for an access network (e.g., provides access to an IP, ATM or similar packet-based network in order to convey packet data traffic), whereby the network interfaces with the packet pipe are standardized so that any packet pipe that satisfies the interface requirements can be utilized in the same access network. Also, the packet pipe uses a packet-based protocol stack with Quality of Service provisions for service delivery instead of the conventional best effort service delivery functions used. Consequently, the packet pipe and access network are capable of providing all of the numerous services available with an IP, ATM or similar packet-based network layered architecture.

Claims

1. An access network architecture for providing terminal equipment (TE) with access to a packet data network through an access router, said architecture comprising:

a packet pipe that provides layer 1 and layer 2 functions to convey packet data traffic between the TE and the packet data network across a radio air interface, said packet pipe including;

a radio termination unit on a user side of the packet pipe, said radio termination unit including a first interface that converts a first protocol utilized by the TE to a second protocol;

a radio relay unit coupled to the radio termination unit; and

a radio nodes unit coupled to the radio relay unit on a network side of the packet pipe, said radio nodes unit including a second interface that converts the second protocol to a third protocol utilized by the access router;

a first interworking function (IWF) coupled to the radio termination unit on the user side of the packet pipe, said first IWF mapping application flows between the TE and the radio termination unit, said first IWF identifying the type of flow and corresponding quality of service (QoS) requirements, and categorizing the flow for pertinent bearer services; and

a second IWF coupled to the radio nodes unit on the network side of the packet pipe, said second IWF mapping application flows between the radio nodes unit and the access router, said second IWF mapping packets onto relevant bearers in accordance with the identified QoS requirements.

2. The access network architecture of claim 1 wherein the packet pipe includes a point-to-multipoint functionality for supporting a plurality of data sessions from a plurality of TEs.

3. The access network architecture of claim 1 wherein the packet pipe includes a protocol stack that supports Differentiated Services (DiffServ).

4. The access network architecture of claim 1 wherein the packet pipe includes means for calculating link budgets to ensure a satisfactory Bit Error Rate (BER) for physical layer channels.

5. The access network architecture of claim 1 wherein the packet pipe is optimized for transporting Asynchronous Transfer Mode (ATM) packets.

6. The access network architecture of claim 1 wherein the packet pipe provides an interface to the first and second IWFs to reserve, maintain, or remove a radio resource as determined by the identified QoS requirements.

7. The access network architecture of claim 1 wherein the packet pipe includes:

a set of defined QoS classes; and

means for delivering satisfactory services as defined by the QoS classes.

8. The access network architecture of claim 7 wherein the packet pipe includes means for prioritizing packet data traffic belonging to the same or a different QoS class during times of congestion.

9. The access network architecture of claim 1 wherein the packet pipe is optimized for transporting Internet Protocol (IP) packets.

10. The access network architecture of claim 1 wherein the packet pipe includes a packet segmentation function that splits incoming packets into smaller units prior to transmission across the radio air interface.

11. The access network architecture of claim 10 wherein the packet pipe includes a packet reassembly function that joins packet units received across the radio air interface into reassembled packets.