CHANNEL ACCESS SYSTEMS AND METHODS FOR COGNITIVE RELAYING FOR CELLULAR SYSTEMS

• US 20130294356A1
• Filed: 09/22/2011
• Published: 11/07/2013
• Est. Priority Date: 09/23/2010
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Bala, Erdem, Kaur, Samian J., Yang, Rui, Deng, Tao, Liu, Feilu
• Granted Patent: US 9,750,019 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Embodiments contemplate channel access systems and methods for cognitive relaying in unlicensed and lightly licensed bands. Embodiments contemplate managing nodes of a wireless network operating in an unlicensed and or lightly licensed band. One or more embodiments may include sensing an idle channel in the unlicensed and/or lightly licensed band. Further, embodiments contemplate using the idle channel for wireless communication.

Claims

1-20. -20. (canceled)

21. A first device, comprising:

a processor configured, at least in part, to;

determine a respective plurality of access opportunities for a respective plurality of second devices, the respective access opportunities providing the respective plurality of second devices with coordinated access to a first channel in a first frequency band; and

initiate the transmission of the respective plurality of access opportunities to the respective plurality of second devices via a second channel in a second band.

22. The first device of claim 21, wherein the first frequency band is at least one of an unlicensed band or a lightly-licensed band, and the second frequency band is a licensed band.

23. The first device of claim 21, wherein the first device is a cognitive relay node.

24. The first device of claim 21, wherein the respective plurality of second devices are a respective plurality of wireless transmit/receive units (WTRUs).

25. The first device of claim 24, wherein the coordinated access to the first channel in the first frequency band provides for non-overlapping-in-time access of the respective plurality of WTRUs to the first channel in the first frequency band.

26. A method, comprising:

determining, by a device, a respective plurality of access opportunities for a respective plurality of wireless transmit/receive units (WTRUs), the respective access opportunities providing the respective plurality of WTRUs with coordinated access to a first channel in a first frequency band; and

transmitting, by the device, the respective plurality of access opportunities to the respective plurality of WTRUs as a part of control information via a control channel in a second band.

27. The method of claim 26, further comprising:

obtaining, by the respective plurality of WTRUs, the respective plurality of access opportunities by decoding the control channel.

28. The method of claim 26, further comprising:

obtaining, by the respective plurality of WTRUs, one or more properties of an incoming transmission on the first channel of the first frequency band by decoding the control channel.

29. The method of claim 26, further comprising:

transmitting, by the respective plurality of WTRUs, a respective response to the control information via a second channel in the second band.

30. The method of claim 26, wherein the device is a cognitive relay node, the first frequency band is at least one of an unlicensed band or a lightly-licensed band, and the second frequency band is a licensed band.

31. The method of claim 26, wherein each of the respective plurality of WTRUs have a respective sensing region.

32. The method of claim 31, wherein each of the respective plurality of WTRUs is within the respective sensing region of at least one other WTRU of the respective plurality of WTRUs.

33. The method of claim 32, further comprising:

conducting, by each of the respective plurality of WTRUs, at least one of a fixed-time sensing or a variable time-sensing for transmissions from at least one other WTRU of the respective plurality of WTRUs.

34. The method of claim 33, further comprising:

conducting, by each of the respective plurality of WTRUs, the fixed-time sensing by performing a measurement of at least one of a transmission duration or an attempt interval.

35. The method of claim 26, further comprising:

measuring, by at least one WTRU of the respective plurality of WTRUs, a utilization rate of the first channel in the first frequency band.

36. The method of claim 35, further comprising:

coordinating, by the at least one WTRU of the respective plurality of WTRUs, at least one transmission based on the utilization rate, the at least one transmission being via the first channel in the first frequency band to at least one other WTRU of the respective plurality of WTRUs.

37. A device, comprising:

a processor configured, at least in part, to;

determine a respective plurality of access opportunities for a respective plurality of wireless transmit/receive units (WTRUs), the respective access opportunities providing the respective plurality of WTRUs with transmission access to respective channels in a first frequency band; and

initiate the transmission of the respective plurality of access opportunities to the respective plurality of WTRUs via a second channel in a second band.

38. The device of claim 37, wherein the processor is further configured to monitor at least one of a transmission queue length or a buffer status report of at least one WTRU of the plurality of WTRUs.

39. The device of claim 38, wherein the processor is further configured to determine a bandwidth for the at least one WTRU of the plurality of WTRUs based, at least in part, on the at least one of the transmission queue length or the buffer status report.

40. The device of claim 37, wherein the device is a cognitive relay node, the first frequency band is at least one of an unlicensed band or a lightly-licensed band, and the second frequency band is a licensed band.