ADAPTIVE CONTROL CHANNEL

• US 20140031031A1
• Filed: 01/11/2013
• Published: 01/30/2014
• Est. Priority Date: 01/11/2012
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Gauvreau, Jean-Louis, Freda, Martino, Ye, Chunxuan, Di Girolamo, Rocco, Laughlin, Scott, Rudolf, Marian, Touag, Athmane, Syed, Kamraan Nasim
• Granted Patent: US 9,072,107 B2
• Time in Patent Office: Days
• US Class Current: 455/426.1
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A wireless network may implement a reduced bandwidth for control information transmitted and/or received on the wireless network. The reduced bandwidth may be used to avoid interference that may be detected from an in-band or adjacent channel. The reduced bandwidth may be used for transmission and/or reception of control information on a cellular or Wi-Fi channel. An eNB or an access point (AP) may signal to a wireless transmit/receive unit (WTRU) information associated with the reduced control channel, such as the power and/or the location of the channel in a frequency band. The control channel may be shifted to avoid a change in interference.

Claims

1. A method for processing control information in a wireless network, the method comprising:

determining a reduced bandwidth for control information on a cellular channel adjacent to a non-cellular channel, wherein the cellular channel and the non-cellular channel occupy a same frequency band, and wherein the reduced bandwidth is determined to avoid interference of the control information from the adjacent non-cellular channel; and

locating the control information on the cellular channel based on the reduced bandwidth.

2. The method of claim 1, wherein the reduced bandwidth is determined based on an indication received from an eNB.

3. The method of claim 1, wherein the adjacent non-cellular channel comprises a digital television channel or a radar channel.

4. The method of claim 1, wherein the cellular channel comprises at least one of a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid-ARQ Indicator Channel (PHICH), a Physical Downlink Control Channel (PDCCH), or a Physical Broadcast Channel (PBCH).

5. The method of claim 1, further comprising:

taking measurements to identify the interference from the adjacent non-cellular channel; and

sending the measurements to an eNB.

6. The method of claim 1, wherein determining the reduced bandwidth for receiving the control information on the cellular channel comprises determining a power and a location for the reduced bandwidth to avoid the interference from the adjacent non-cellular channel.

7. The method of claim 6, further comprising shifting the reduced bandwidth for the control information to another location on the cellular channel to avoid additional interference.

8. The method of claim 1, wherein locating the control information further comprises discarding information associated with a set of consecutive resource blocks closest to the adjacent non-cellular channel.

9. The method of claim 1, wherein determining the reduced bandwidth comprises altering a mapping associated with resource elements used for the control channel.

10. The method of claim 1, further comprising receiving data on the cellular channel using a full bandwidth associated with the cellular channel.

11. A wireless transmit/receive unit for processing control information in a wireless network, the WTRU comprising:

a processor configured to;

determine a reduced bandwidth for control information on a cellular channel adjacent to a non-cellular channel, wherein the cellular channel and the non-cellular channel occupy a same frequency band, and wherein the processor is configured to determine the reduced bandwidth to avoid interference of the control information from the adjacent non-cellular channel; and

locate the control information on the cellular channel based on the reduced bandwidth.

12. The WTRU of claim 11, wherein the processor is configured to determine the reduced bandwidth based on an indication received from an eNB.

13. The WTRU of claim 11, wherein the adjacent non-cellular channel comprises a digital television channel or a radar channel.

14. The WTRU of claim 11, wherein the cellular channel comprises at least one of a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid-ARQ Indicator Channel (PHICH), a Physical Downlink Control Channel (PDCCH), or a Physical Broadcast Channel (PBCH).

15. The WTRU of claim 11, wherein the processor is further configured to:

take measurements to identify the interference from the adjacent non-cellular channel; and

send the measurements to an eNB.

16. The WTRU of claim 11, wherein the processor being configured to determine the reduced bandwidth comprises the processor being configured to determine a power and a location for the reduced bandwidth to avoid the interference from the adjacent non-cellular channel.

17. The WTRU of claim 16, wherein the processor is configured to shift the reduced bandwidth for the control information to another location on the cellular channel to avoid additional interference.

18. The WTRU of claim 11, wherein the processor being configured to locate the control information using the reduced bandwidth comprises the processor being configured to discard information associated with a set of consecutive resource blocks closest to the adjacent non-cellular channel.

19. The WTRU of claim 11, wherein the processor being configured to determine the reduced bandwidth comprises the processor being configured to alter a mapping associated with resource elements used for the control channel.

20. The WTRU of claim 11, wherein the processor is configured to receive data on the cellular channel using a full bandwidth associated with the cellular channel.

21. A wireless transmit/receive unit (WTRU) for processing control information in a wireless network, the WTRU comprising:

a processor configured to;

receive information associated with a bandwidth;

determine a first portion of the bandwidth for control information on a cellular channel adjacent to a non-cellular channel, wherein the processor is configured to determine the first portion of the bandwidth to avoid interference of the control information from the adjacent non-cellular channel; and

process the received information based on the determined first portion of the bandwidth for the control information.

22. The WTRU of claim 21, wherein the processor being configured to process the received information further comprises the processor being configured to discard information associated with a second portion of the bandwidth to avoid the interference of the control information.

23. The WTRU of claim 22, wherein the second portion of the bandwidth is adjacent to the non-cellular channel.

24. The WTRU of claim 21, wherein the processor being configured to process the received information further comprises the processor being configured to locate the control information in the received information associated with the bandwidth.