System and method for improving communications between a digital loop carrier and a central office

• US 6,725,059 B1
• Filed: 07/20/1999
• Issued: 04/20/2004
• Est. Priority Date: 07/21/1998
• Status: Expired due to Term

• Current Assignee: Ikanos Communications Incorporated (Qualcomm, Inc.)
• Original Assignee: GlobespanVirata, Inc. (Synaptics Incorporated)
• Inventors: Bell, Russell W.
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US09/357,706
• Time in Patent Office: 1,736 Days
• Field of Search: 455/403, 455/554, 455/11.1, 455/12.1, 455/15, 455/422, 455/426, 455/446, 455/426.2, 455/554.2, 455/445, 375/211, 370/330
• US Class Current: 455/554.2
• CPC Class Codes: H04W 84/14 WLL [Wireless Local Loop]; RLL [Radio Local Loop]

Abstract

The present invention is directed to a system and method for upgrading a telecommunication system including a central office (CO), a digital loop carrier (DLC), and a plurality of customer premises equipment (CPE). Broadly, the present invention is realized by the retrofit of a DLC to enable the DLC to communicate with a CO through high bandwidth wireless transmissions. The high bandwidth wireless transmissions accommodate much larger data throughput than previously accommodated through the copper “backhaul” of multiple T1 circuits. In accordance with one aspect of the present invention, a telecommunications system comprises a CO, a DLC, and a plurality of CPE. Each of the plurality of CPE are electrically connected to the DLC. A radio frequency (RF) interface circuit is disposed at the DLC, along with one or more DSL line cards. A first wireless transceiver disposed at the DLC, and is electrically connected to the radio frequency interface circuit. A second wireless transceiver is electrically coupled to the CO. In accordance with the invention, information is exchanged between the CO and the DLC via wireless communications between the first wireless transceiver and the second wireless transceiver.

Claims

1. A telecommunications system comprising:

a central office (CO);

a digital loop carrier (DLC);

a plurality of customer premises equipment (CPE), wherein each of the plurality of CPE are electrically connected to the DLC;

a radio frequency (RF) interface circuit disposed at the DLC;

a first wireless transceiver disposed at the DLC, the wireless transceiver being electrically connected to the radio frequency interface circuit; and

a second wireless transceiver electrically coupled to the CO, whereby information is exchanged between the CO and the DLC via wireless communications between the first wireless transceiver and the second wireless transceiver.

2. The telecommunications system as defined in claim 1, wherein the wireless transceivers communicate using a local multipoint distribution service (LMDS).

3. The telecommunications system as defined in claim 2, wherein the LMDS operates in a frequency range of approximately 27.5 GHz to 29.5 GHz.

4. The telecommunications system as defined in claim 1, wherein the first wireless transceiver and the second wireless transceiver are in direct communication with one another.

5. The telecommunications system as defined in claim 1, further including a third wireless transceiver interposed between the first wireless transceiver and the second wireless transceiver.

6. The telecommunications system as defined in claim 5, wherein the first wireless transceiver is in communication with the third wireless transceiver, and the third wireless transceiver is in communication with the second wireless transceiver, whereby data exchanged between the first wireless transceiver and the second wireless transceiver is relayed through the third wireless transceiver.

7. The telecommunications system as defined in claim 5, further including additional wireless transceivers interposed between the first wireless transceiver and the third wireless transceiver.

8. A telecommunications system comprising:

a central office (CO);

a digital loop carrier (DLC),

a plurality of customer premises equipment (CPE), wherein each of the plurality of CPE are electrically connected to the DLC;

a radio frequency (RF) interface circuit disposed at the DLC;

a first wireless transceiver disposed at the DLC, the wireless transceiver being electrically connected to the radio frequency interface circuit; and

a second wireless transceiver disposed at a second DLC, and electrically coupled thereto, the second DLC being electrically coupled to the CO through a high speed interconnect, whereby information is exchanged between the CO and the DLC.

9. The telecommunications system as defined in claim 8, wherein the second DLC is electrically coupled to the CO via a fiber optic cable link.

10. The telecommunications system as defined in claim 8, wherein the wireless transceivers communicate using a local multipoint distribution service (LMDS).

11. The telecommunications system as defined in claim 8, wherein the first wireless transceiver and the second wireless transceiver are in direct communication with one another.

12. The telecommunications system as defined in claim 8, further including a third wireless transceiver interposed between the first wireless transceiver and the second wireless transceiver.

13. The telecommunications system as defined in claim 12, wherein the first wireless transceiver is in communication with the third wireless transceiver, and the third wireless transceiver is in communication with the second wireless transceiver, whereby data exchanged between the first wireless transceiver and the second wireless transceiver is relayed through the third wireless transceiver.

14. The telecommunications system as defined in claim 12, further including additional wireless transceivers interposed between the first wireless transceiver and the third wireless transceiver.

15. In a telecommunications system having a central office (CO) in communication with a plurality customer premises equipment (CPE) via a digital loop carrier (DLC), wherein the CO and DLC are connected for communication through copper wire, a method for modifying the telecommunications system to accommodate higher bandwidth communications between the CO and the CPE comprising the steps of

equipping the DLC with a radio frequency interface circuit and a first wireless transceiver;

providing a second wireless transceiver in communication with the CO, wherein the second wireless transceiver is disposed for communication with the first wireless transceiver.

16. The method as defined in claim 15, further including the step of communicating between the first wireless transceiver and the second wireless transceiver using a local multipoint distribution service (LMDS).

17. The method as defined in claim 15, wherein the step of equipping the DLC further includes installing digital subscriber line (DSL) cards within the DLC.