Determining a transmit parameter for wireless communication

• US 9,661,649 B2
• Filed: 04/06/2015
• Issued: 05/23/2017
• Est. Priority Date: 08/07/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Nanda, Sanjiv, Sampath, Ashwin
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): HYUN, SOON D
• Application Number:
  US14/679,931
• Publication Number:
  US 20150215959A1
• Time in Patent Office: 778 Days
• Field of Search: None
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A wireless media access control supports asynchronous communication and overlapping transmissions. Here, a wireless node may determine whether to request or schedule a transmission based on control messages it receives from neighboring nodes. In some implementations a scheduled transmission may be divided up into several segments so that a transmitting node may receive and transmit control messages between segments. In some implementations a monitoring period is defined after a scheduled transmission period to enable the transmitting node to acquire control information that may otherwise have been transmitted during the scheduled transmission period. In some implementations data and control information are transmitted over different frequency division multiplexed channels to enable concurrent transmission of the data and control information.

Claims

1. A method of wireless communication for a first wireless node, comprising:

receiving information at the first wireless node that indicates a scheduled reception of data for a second wireless node;

determining an extent to which a transmission from the first wireless node to a third wireless node during a time period associated with the scheduled reception of data would interfere with reception at the second wireless node, wherein the determination of the extent is based on the received information; and

determining at least one transmit parameter for the transmission from the first wireless node to the third wireless node, wherein the determination of the at least one transmit parameter is based on the determined extent.

2. The method of claim 1, wherein:

the reception of the information comprises receiving a signal from the second wireless node;

the method further comprises determining a path loss between the first wireless node and the second wireless node based on the received signal; and

the determination of the extent is further based on the path loss.

3. The method of claim 1, wherein:

the reception of the information comprises receiving a signal from the second wireless node;

the method further comprises determining a signal strength of the received signal; and

the determination of the extent is further based on the signal strength.

4. The method of claim 1, wherein the determination of the at least one transmit parameter comprises modifying a set of rules relating to a degree to which transmission by the first wireless node may interfere with reception at the second wireless node.

5. The method of claim 1, wherein the determination of the at least one transmit parameter comprises adjusting a transmit bandwidth based on the determined extent.

6. The method of claim 1, wherein the determination of the at least one transmit parameter comprises adjusting a transmit rate based on the determined extent.

7. The method of claim 1, wherein the determination of the at least one transmit parameter comprises adjusting a transmit power delta based on the determined extent.

8. The method of claim 1, wherein the determination of the at least one transmit parameter comprises adjusting a transmit power level based on the determined extent.

9. The method of claim 1, wherein the determination of the at least one transmit parameter comprises adjusting a transmission time based on the determined extent.

10. The method of claim 1, wherein the determination of the at least one transmit parameter comprises determining an extent to which the at least one transmit parameter is adapted.

11. The method of claim 1, further comprising:

receiving other information that indicates at least one other scheduled reception of data; and

aggregating the received information and the received other information over a period of time,

wherein the determination of the extent is further based on the aggregated information.

12. The method of claim 1, wherein the determination of the extent is based on a receive margin associated with the received information.

13. The method of claim 1, wherein the determination of the extent is based on a pilot signal associated with the received information.

14. The method of claim 1, wherein the received information comprises at least one of:

a transmission start time, a transmission end time, a transmission time period, a transmission power, a quantity of redundancy bits to transmit, a code rate, or an expected channel to interference ratio.

15. The method of claim 1, wherein the transmission from the first wireless node to the third wireless node comprises a transmission via a control channel.

16. The method of claim 15, wherein:

the first wireless node transmits data via a data channel;

the control channel and the data channel are frequency division multiplexed within a common frequency band; and

the control channel is associated with a plurality of sub-frequency bands that are interspersed within the common frequency band.

17. The method of claim 1, wherein the received information comprises a grant message generated by the second wireless node in response to a request to transmit by a fourth wireless node.

18. The method of claim 1, wherein:

the second wireless node receives data transmitted by a fourth wireless node during a plurality of time segments defined within a scheduled transmit time period corresponding to the scheduled reception of data; and

a time interval for transmission or reception of control information is temporally located between the time segments.

19. The method of claim 1, wherein the received information comprises a resource utilization message that indicates at least one of:

a level of desired interference reduction, a resource to be cleared, or a degree to which reception at a receiving wireless node is not meeting a desired level of quality of service.

20. The method of claim 1, further comprising:

transmitting data from the first wireless node via an antenna to the third wireless node according to the at least one transmit parameter.

21. An apparatus for wireless communication for a first wireless node, comprising:

a receiver configured to receive information that indicates a scheduled reception of data for a second wireless node; and

a controller coupled with the receiver and configured to;

determine an extent to which a transmission from the first wireless node to a third wireless node during a time period associated with the scheduled reception of data would interfere with reception at the second wireless node, wherein the determination of the extent is based on the received information, and

determine at least one transmit parameter for the transmission from the first wireless node to the third wireless node, wherein the determination of the at least one transmit parameter is based on the determined extent.

22. The apparatus of claim 21, wherein:

the receiver is configured to receive the information by being configured to receive a signal from the second wireless node;

the controller is further configured to determine a path loss between the first wireless node and the second wireless node based on the received signal; and

the controller is configured to determine the extent based on the path loss.

23. The apparatus of claim 21, wherein:

the receiver is configured to receive the information by being configured to receive a signal from the second wireless node;

the controller is further configured to determine a signal strength of the received signal; and

the controller is configured to determine the extent based on the signal strength.

24. The apparatus of claim 21, wherein, to determine the at least one transmit parameter, the controller is further configured to modify a set of rules relating to a degree to which transmission by the first wireless node may interfere with reception at the second wireless node.

25. The apparatus of claim 21, wherein, to determine the at least one transmit parameter, the controller is further configured to adjust at least one of:

a transmit bandwidth, a code rate, or a transmit power delta.

26. The apparatus of claim 21, wherein, to determine the at least one transmit parameter, the controller is further configured to determine an extent to which the at least one transmit parameter is adapted.

27. The apparatus of claim 21, wherein the controller is configured to determine the extent based on a receive margin associated with the received information or based on a pilot signal associated with the received information.

28. The apparatus of claim 21, further comprising:

a transmitter coupled with the controller and configured to transmit data from the first wireless node via an antenna to the third wireless node, wherein the transmitter is further configured to transmit the data according to the at least one transmit parameter.

29. An apparatus for wireless communication for a first wireless node, comprising:

means for receiving information that indicates a scheduled reception of data for a second wireless node;

means for determining an extent to which a transmission from the first wireless node to a third wireless node during a time period associated with the scheduled reception of data would interfere with reception at the second wireless node, wherein the determination of the extent is based on the received information; and

means for determining at least one transmit parameter for the transmission from the first wireless node to the third wireless node, wherein the determination of the at least one transmit parameter is based on the determined extent.

30. A non-transitory computer-readable medium storing computer executable code for wireless communication for a first wireless node, including code to:

receive information that indicates a scheduled reception of data for a second wireless node;

determine an extent to which a transmission from the first wireless node to a third wireless node during a time period associated with the scheduled reception of data would interfere with reception at the second wireless node, wherein the determination of the extent is based on the received information; and

determine at least one transmit parameter for the transmission from the first wireless node to the third wireless node, wherein the determination of the at least one transmit parameter is based on the determined extent.