VIRTUAL FULL DUPLEX NETWORK COMMUNICATIONS

• US 20150023232A1
• Filed: 10/08/2014
• Published: 01/22/2015
• Est. Priority Date: 09/25/2009
• Status: Active Grant

• Current Assignee: Northwestern University
• Original Assignee: Northwestern University
• Inventors: Guo, Dongning
• Granted Patent: US 9,832,769 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/535 based on resource usage policies
• CPC Class Codes: H04W 88/18 Service support devices; Network management devices

Abstract

A half-duplex wireless network device is structured to transmit and receive information over a unique pattern of one or more transmission slots and one or more reception slots within each of a sequence of communication frames to accomplish virtual full-duplex communication.

Claims

1. A method in a network of distributed wireless communication devices, comprising:

a first wireless communication device receiving information from a second wireless communication device during a reception slot for the first wireless communication device, the first wireless communication device configured to transmit data packets, the data packets being partitioned to include the reception slot; and

the first wireless communication device receiving information from a third wireless communication device during the reception slot for the first wireless communication device.

2. The method of claim 1, further comprising designating a unique pattern of transmission slots and reception slots for the first wireless communication device, data packets being partitioned to include the transmission slots and the reception slots.

3. The method of claim 2, further comprising applying an error control code for the data packets.

4. The method of claim 2, where the designating comprises performing a compressed sensing process.

5. The method of claim 2, wherein each unique pattern is based on a second order Reed-Muller code.

6. The method of claim 2, where the data packet provides full-duplex transmission using half-duplex radios.

7. A method in a network of distributed wireless communication devices, comprising:

a first wireless communication device and a second wireless communication device transmitting a first and a second information to a third wireless communication device; and

the third wireless communication device simultaneously sending symbols of information in a data packet to the first wireless communication device while receiving the first and second information from the first wireless communication device and the second wireless communication device, the symbols of information being sent during transmission slots of the data packet and the first and second information being received during reception slots of the data packet.

8. The method of claim 7, further comprising designating a unique pattern of transmission slots and reception slots for the first wireless communication device, the second wireless communication device and the third wireless communication device.

9. The method of claim 8, wherein the designating comprises performing a compressed sensing process.

10. The method of claim 8, wherein each unique pattern is based on a second order Reed-Muller code.

11. The method of claim 7, further comprising applying an error control code to the data packets.

12. The method of claim 11, where the error control code provides for recovering the first and second information despite erasures due to transmission of the symbols of information.

13. The method of claim 7, where the transmission slots and the reception slots provide virtual full-duplex transmission using half-duplex radios.

14. The method of claim 7, further comprising the third communication device emitting energy over the transmission slots and measuring energy over the reception slots.

15. The method of claim 7, where intervals for the transmission slots and the reception slots comprise on an order of microseconds.

16. A wireless communication device operable to wirelessly communicate with one or more other devices through a wireless network, comprising:

a half-duplex radio;

the half-duplex radio including a wireless transmitter and a wireless receiver;

a signal processor operatively coupled to the wireless transmitter and the wireless receiver, the signal processor being structured to execute an operating logic to communicate information in a data packet in accordance with a pattern unique to the device relative to the other devices; and

where the data packet is partitioned into a data transmission slot and a data reception slot, the operating logic being structured to transmit the information during the transmission slot of the data packet and listen for information during the reception slot of the data packet, where data transmission slot for a unique pattern overlaps with data transmission slot from another unique pattern.

17. The wireless communication device of claim 16, where the data packet includes an error control code.

18. The device of claim 17, where the error control code provides for recovering the information despite erasures due to transmission overlap.

19. The device of claim 16, where the data transmission slot and the data reception slot provide full-duplex transmission using the half-duplex radio.

20. The device of claim 16, where the communication device and the one or more other devices simultaneously transmit data packets.