Method and system for detecting messages using enhanced distributed signaling

• US 8,050,622 B2
• Filed: 12/04/2006
• Issued: 11/01/2011
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Grabner, John, Jin, Hang, Hedayat, Ahmadreza
• Primary Examiner(s): Hu; Jinsong
• Assistant Examiner(s): Georgewill; Opiribo
• Application Number:
  US11/633,169
• Publication Number:
  US 20070190932A1
• Time in Patent Office: 1,793 Days
• Field of Search: 370/338, 455/41.2, 455/67.11, 455/67.14, 455/433, 455/7, 455/433.7, 455/16
• US Class Current: 455/16
• CPC Class Codes: H04B 7/026 Co-operative diversity, e.g. using fixed or mobile stations as relays
• CPC Class Codes: H04B 7/06 at the transmitting station
• CPC Class Codes: H04B 7/15592 Adapting at the relay station communication parameters for supporting cooperative relaying, i.e. transmission of the same data via direct - and relayed path cooperative diversity H04B7/024
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 2001/0097 Relays

Abstract

A method and system are provided for detecting messages using enhanced distributed signaling in a wireless communication network that offers transmission diversity to improve the throughput of participating wireless stations.

Claims

1. A wireless communication network comprising:

a source wireless station configured to generate and transmit a message;

a plurality of participating wireless stations configured to;

receive the message;

receive copies of the message from other participating wireless stations to form a corresponding vector set of signals;

generate a supplemental message from the corresponding vector set of signals using a distributed code generating function that produces a regenerated codeword;

transmit the supplemental message;

generate multiple supplemental messages each with a different distributed code generating function from the corresponding vector set of signals;

transmit the multiple supplemental signals; and

a destination wireless station configured to;

receive the message;

receive copies of the supplemental message from the plurality of participating wireless stations to form a vector set of signals;

receive the multiple supplemental messages from the plurality of participating wireless stations;

process the vector set of signals, copies of the supplemental message, and the multiple supplemental messages according to a joint-decoding function to recover the message.

2. The network of claim 1, wherein the plurality of participating wireless stations employ a concatenated coding method for generating the regenerated codeword.

3. The network of claim 1, wherein the plurality of participating wireless stations employ a Low Density Parity-Check coding method for generating the regenerated codeword.

5. The network of claim 1, wherein the plurality of participating wireless stations generate the supplementary message according to the distributed code generating function that employs an exclusive-or operation.

10. The network of claim 1, wherein the supplementary messages are generated and sent from the participating wireless devices when the message is received error-free or when a signal-to-noise ratio for the message exceeds a predetermined threshold.

4. A method comprising:

receiving at each of a plurality of participating wireless devices a copy of an original message transmitted by a source wireless device to a destination wireless device;

at each participating wireless device, receiving signals based on the copy of the original message from other participating wireless devices to form a corresponding vector set of signals, generating a supplemental signal from the corresponding vector set of signals using a distributed code generating function that produces a regenerated codeword, transmitting the supplemental signal from each participating wireless device to the destination wireless device, generating multiple supplemental signals each with a different distributed code generating function from the corresponding vector set of signals, and transmitting the multiple supplemental signals from each participating wireless device to the destination wireless device;

at the destination wireless device, receiving a copy of the original message transmitted by the source wireless device, receiving signals based on the copy of the original message from the participating wireless devices to form a vector set of signals, receiving copies of the supplemental signals transmitted by the participating wireless devices, and processing one or more of the supplemental signals, the vector set of signals, and the received copy of the original message according to a joint-decoding function to recover the original message.

6. The method of claim 4, wherein generating comprises generating the supplemental signal according to the distributed code generating function that employs an exclusive-or operation.

7. The method of claim 4, wherein generating comprises employing a concatenated coding method for generating the regenerated codeword.

8. The method of claim 4, wherein generating comprises employing Low Density Parity-Check coding for generating the regenerated codeword.

9. The method of claim 4, wherein generating and transmitting the supplementary messages at the participating wireless devices are performed when the original message is received error-free or when a signal-to-noise ratio for the original message exceeds a predetermined threshold.