Monitor period for asynchronous wireless communication

• US 8,340,027 B2
• Filed: 08/03/2007
• Issued: 12/25/2012
• 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
• Assistant Examiner(s): HYUN, SOON D
• Application Number:
  US11/833,935
• Publication Number:
  US 20080031223A1
• Time in Patent Office: 1,971 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04W 72/27 between access points

Abstract

A monitoring period is defined after a scheduled transmission period to enable a transmitting node to acquire control information that may otherwise have been transmitted during the scheduled transmission period. In some implementations the 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 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 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, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period; and

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises at least one of a grant message transmitted by a second wireless node in response to a request to transmit from a third wireless node and a confirmation message transmitted by the second wireless node in response to a grant message from the third wireless node.

2. The method of claim 1, wherein the control information comprises information that was previously transmitted by the second wireless node during the scheduled transmit time period.

3. The method of claim 1, further comprising:

defining, based on the control information, a transmit constraints state that is used to issue a request to transmit.

5. The method of claim 3, wherein the transmit constraints state comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, receive margin, and a received signal strength indication associated with the grant message or an acknowledgement message.

7. The method of claim 1, further comprising:

defining, based on the control information, a rate prediction state that is used to schedule a requested data transmission.

9. The method of claim 7, wherein the rate prediction state comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, and a received signal strength indication associated with the confirmation message.

11. The method of claim 1, further comprising:

transmitting other control information to enable the second wireless node to determine the scheduled transmit time period.

12. The method of claim 11, wherein the other control information comprises, with respect to the scheduled transmit time period, at least one of the group consisting of:

transmission start time, transmission end time, and transmission time period.

13. The method of claim 11, wherein the other control information comprises a confirmation message associated with the scheduled transmit time period.

14. The method of claim 1, wherein the scheduled transmit time period is based on a parameter received via a grant message from a fourth wireless node in response to a request to transmit.

15. The method of claim 1, wherein

the grant message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmission power, a quantity of redundancy bits to transmit, code rate, expected channel to interference ratio, receive margin, and a pilot signal.

16. The method of claim 1, wherein

the confirmation message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, packet format, and a pilot signal.

22. The method of claim 1, wherein the transmission of the control information is scheduled by the second wireless node.

23. The method of claim 1, further comprising receiving control information without receiving other data during the defined period of time.

4. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period;

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

defining, based on the control information, a transmit constraints state that is used to issue a request to transmit; and

determining, based on the transmit constraints state, whether transmission by the first wireless node would interfere with reception at a second wireless node during another scheduled transmit time period.

6. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period;

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

defining, based on the control information, a transmit constraints state that is used to issue a request to transmit; and

determining, based on the transmit constraints state, whether to abstain from sending the request to transmit, delay sending of the request to transmit, request to transmit at a later time, adjust a transmit time period, or request to transmit at a reduced power level.

8. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period;

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

defining, based on the control information, a rate prediction state that is used to schedule a requested data transmission; and

scheduling the requested data transmission if the rate prediction state indicates that the first wireless node will be able to receive data in a sustainable manner during a scheduled data transmission, taking into consideration potential transmissions by other wireless nodes.

10. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period;

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

defining, based on the control information, a rate prediction state that is used to schedule a requested data transmission; and

determining, based on the rate prediction state, whether to abstain from sending a grant in response to a request to transmit, select a different data transmission time, select a different transmit time period, select a different transmit power, select a different quantity of redundancy bits to transmit, or select a different code rate.

17. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period; and

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a second wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one acknowledgement message that the second wireless node transmitted during the at least one time interval to acknowledge data received during at least one of the time segments; and

wherein the at least one acknowledgement message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmission power for at least one of the time segments, a quantity of redundancy bits to transmit for at least one of the time segments, code rate for at least one of the time segments, expected channel to interference ratio for at least one of the time segments, receive margin, and a pilot signal.

18. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period; and

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a second wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one confirmation message that the second wireless node transmitted during the at least one time interval; and

wherein the at least one confirmation message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmit power delta, packet format, and a pilot signal.

19. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period; and

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a second wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments; and

wherein the defined period of time after the scheduled transmit time period has a longer duration than any one of the time segments.

20. A method of wireless communication, comprising:

transmitting data, by a first wireless node, via a data channel during a scheduled transmit time period; and

monitoring for control information, at the first wireless node, on a control channel during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

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

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

21. A method of wireless communication, comprising:

transmitting data, by a first wireless node, during a scheduled transmit time period; and

monitoring for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises a resource utilization message comprising at least one of the group consisting of;

a level of desired interference reduction, a resource to be cleared, and an indication of a degree to which reception at the first wireless node is not meeting a desired level of quality of service.

24. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period; and

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises at least one of a grant message transmitted by a first second wireless node in response to a request to transmit from a second wireless node and a confirmation message transmitted by the first wireless node in response to a grant message from the second wireless node.

25. The apparatus of claim 24, wherein the control information comprises information that was previously transmitted by the first wireless node during the scheduled transmit time period.

26. The apparatus of claim 24, further comprising:

a state controller configured to define, based on the control information, a transmit constraints state that is used to issue a request to transmit.

28. The apparatus of claim 26, wherein the transmit constraints state comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, receive margin, and a received signal strength indication associated with the grant message or an acknowledgement message.

30. The apparatus of claim 24, further comprising:

a state controller configured to define, based on the control information, a rate prediction state that is used to schedule a requested data transmission.

32. The apparatus of claim number 30, wherein the rate prediction state comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, and a received signal strength indication associated with the confirmation message.

34. The apparatus of claim 24, wherein the transmitter is further configured to transmit other control information to enable the first wireless node to determine the scheduled transmit time period.

35. The apparatus of claim 34, wherein the other control information comprises, with respect to the scheduled transmit time period, at least one of the group consisting of:

transmission start time, transmission end time, and transmission time period.

36. The apparatus of claim 34, wherein the other control information comprises a confirmation message associated with the scheduled transmit time period.

37. The apparatus of claim 24, wherein the scheduled transmit time period is based on a parameter received via a grant message from a third wireless node in response to a request to transmit.

38. The apparatus of claim 24, wherein

the grant message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmission power, a quantity of redundancy bits to transmit, code rate, expected channel to interference ratio, receive margin, and a pilot signal.

39. The apparatus of claim 24, wherein

the confirmation message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, packet format, and a pilot signal.

45. The apparatus of claim 24, wherein the receiver is further configured to receive control information without receiving other data during the defined period of time.

27. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period;

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

a state controller configured to define, based on the control information, a transmit constraints state that is used to issue a request to transmit; and

an interference determiner configured to determine, based on the transmit constraints state, whether transmission by the apparatus would interfere with reception at a wireless node during another scheduled transmit time period.

29. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period;

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

a state controller configured to define, based on the control information, a transmit constraints state that is used to issue a request to transmit; and

a transmission controller configured to determine, based on the transmit constraints state, whether to abstain from sending the request to transmit, delay sending of the request to transmit, request to transmit at a later time, adjust a transmit time period, or request to transmit at a reduced power level.

31. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period;

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

a state controller configured to define, based on the control information, a rate prediction state that is used to schedule a requested data transmission; and

a reception controller configured to schedule the requested data transmission if the rate prediction state indicates that the apparatus will be able to receive data in a sustainable manner during a scheduled data transmission, taking into consideration potential transmissions by other wireless nodes.

33. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period;

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

a state controller configured to define, based on the control information, a rate prediction state that is used to schedule a requested data transmission; and

a reception controller configured to determine, based on the rate prediction state, whether to abstain from sending a grant in response to a request to transmit, select a different data transmission time, select a different transmit time period, select a different transmit power, select a different quantity of redundancy bits to transmit, or select a different code rate.

40. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period; and

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one acknowledgement message that the wireless node transmitted during the at least one time interval to acknowledge data received during at least one of the time segments; and

wherein the at least one acknowledgement message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmission power for at least one of the time segments, a quantity of redundancy bits to transmit for at least one of the time segments, code rate for at least one of the time segments, expected channel to interference ratio for at least one of the time segments, receive margin, and a pilot signal.

41. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period; and

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one confirmation message that the wireless node transmitted during the at least one time interval; and

wherein the at least one confirmation message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmit power delta, packet format, and a pilot signal.

42. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period; and

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments; and

wherein the defined period of time after the scheduled transmit time period has a longer duration than any one of the time segments.

43. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data via a data channel during a scheduled transmit time period; and

a receiver configured to monitor for control information on a control channel during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

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

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

44. An apparatus for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period; and

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises a resource utilization message comprising at least one of the group consisting of;

a level of desired interference reduction, a resource to be cleared, and an indication of a degree to which reception at the apparatus is not meeting a desired level of quality of service.

46. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period; and

means for monitoring for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises at least one of a grant message transmitted by a first wireless node in response to a request to transmit from a second wireless node and a confirmation message transmitted by the first wireless node in response to a grant message from the second wireless node.

47. The apparatus of claim 46, wherein the control information comprises information that was previously transmitted by the first wireless node during the scheduled transmit time period.

48. The apparatus of claim 46, further comprising:

means for defining, based on the control information, a transmit constraints state that is used to issue a request to transmit.

50. The apparatus of claim 48, wherein the transmit constraints state comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, receive margin, and a received signal strength indication associated with the grant message or an acknowledgement message.

52. The apparatus of claim 46, further comprising:

means for defining, based on the control information, a rate prediction state that is used to schedule a requested data transmission.

54. The apparatus of claim 52, wherein the rate prediction state comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, and a received signal strength indication associated with the confirmation message.

56. The apparatus of claim 46, wherein the transmitter is further configured to transmit other control information to enable the first wireless node to determine the scheduled transmit time period.

57. The apparatus of claim 56, wherein the other control information comprises, with respect to the scheduled transmit time period, at least one of the group consisting of:

transmission start time, transmission end time, and transmission time period.

58. The apparatus of claim 56, wherein the other control information comprises a confirmation message associated with the scheduled transmit time period.

59. The apparatus of claim 46, wherein the scheduled transmit time period is based on a parameter received via a grant message from a third wireless node in response to a request to transmit.

61. The apparatus of claim 46, wherein

the confirmation message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, packet format, and a pilot signal.

49. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period;

means for monitoring for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

means for defining, based on the control information, a transmit constraints state that is used to issue a request to transmit; and

means for determining, based on the transmit constraints state, whether transmission by the apparatus would interfere with reception at a wireless node during another scheduled transmit time period.

51. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period;

means for monitoring for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

means for defining, based on the control information, a transmit constraints state that is used to issue a request to transmit; and

means for determining, based on the transmit constraints state, whether to abstain from sending the request to transmit, delay sending of the request to transmit, request to transmit at a later time, adjust a transmit time period, or request to transmit at a reduced power level.

53. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period;

means for monitoring for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

means for defining, based on the control information, a rate prediction state that is used to schedule a requested data transmission; and

means for scheduling the requested data transmission if the rate prediction state indicates that the apparatus will be able to receive data in a sustainable manner during a scheduled data transmission, taking into consideration potential transmissions by other wireless nodes.

55. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period;

means for monitoring for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period;

means for defining, based on the control information, a rate prediction state that is used to schedule a requested data transmission; and

means for determining, based on the rate prediction state, whether to abstain from sending a grant in response to a request to transmit, select a different data transmission time, select a different transmit time period, select a different transmit power, select a different quantity of redundancy bits to transmit, or select a different code rate.

60. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period; and

means for monitoring for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein the control information comprises a grant message generated by a wireless node in response to a request to transmit; and

wherein the grant message comprises at least one of the group consisting of;

transmission start time, transmission end time, transmission time period, transmission power, a quantity of redundancy bits to transmit, code rate, expected channel to interference ratio, receive margin, and a pilot signal.

62. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period; and

means for monitoring for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one acknowledgement message that the wireless node transmitted during the at least one time interval to acknowledge data received during at least one of the time segments; and

wherein the at least one acknowledgement message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmission power for at least one of the time segments, a quantity of redundancy bits to transmit for at least one of the time segments, code rate for at least one of the time segments, expected channel to interference ratio for at least one of the time segments, receive margin, and a pilot signal.

63. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period; and

means for monitoring for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one confirmation message that the wireless node transmitted during the at least one time interval; and

wherein the at least one confirmation message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmit power delta, packet format, and a pilot signal.

64. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period; and

means for monitoring for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

wherein a wireless node transmits or receives data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments; and

wherein the defined period of time after the scheduled transmit time period has a longer duration than any one of the time segments.

65. An apparatus for wireless communication, comprising:

means for transmitting data via a data channel during a scheduled transmit time period; and

means for monitoring for control information on a control channel during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period;

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

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

66. An apparatus for wireless communication, comprising:

means for transmitting data during a scheduled transmit time period; and

means for monitoring for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises a resource utilization message comprising at least one of the group consisting of;

a level of desired interference reduction, a resource to be cleared, and an indication of a degree to which reception at the apparatus is not meeting a desired level of quality of service.

67. A computer-program product for wireless communication, comprising:

non-transitory computer-readable storage medium comprising codes executable by at least one computer to;

transmit data, at a first wireless node, during a scheduled transmit time period; and

monitor for control information, at the first wireless node, during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises at least one of a grant message transmitted by a second wireless node in response to a request to transmit from a third wireless node and a confirmation message transmitted by the second wireless node in response to a grant message from the third wireless node.

68. An access point for wireless communication, comprising:

an antenna;

a transmitter configured to transmit data via the antenna during a scheduled transmit time period; and

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period;

wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

wherein the control information comprises at least one of a grant message transmitted by a first wireless node in response to a request to transmit from a second wireless node and a confirmation message transmitted by the first wireless node in response to a grant message from the second wireless node.

69. An access terminal for wireless communication, comprising:

a transmitter configured to transmit data during a scheduled transmit time period;

a receiver configured to monitor for control information during a defined period of time after the scheduled transmit time period, wherein transmission of the control information is scheduled based on the scheduled transmit time period; and

a user interface configured to output an indication based on data received by the receiver;

wherein the control information comprises at least one of a grant message transmitted by a first wireless node in response to a request to transmit from a second wireless node and a confirmation message transmitted by the first wireless node in response to a grant message from the second wireless node.

70. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node; and

scheduling transmission of control information by the first wireless node based on the received information;

wherein the control information comprises at least one of a grant message in response to a request to transmit from a third wireless node and a confirmation message in response to a grant message from the third wireless node.

71. The method of claim 70, wherein the transmission of the control information commences after the scheduled transmit time period.

73. The method of claim 70, wherein the received information comprises at least one of the group consisting of:

transmission start time, transmission end time, and transmission time period.

74. The method of claim 70, wherein the received information comprises:

a grant message generated in response to a request to transmit, a confirmation message, an acknowledgement message generated to acknowledge receipt of data during the scheduled transmit time period, or a confirmation message transmitted during the scheduled transmit time period.

75. The method of claim 70, further comprising:

defining the control information to enable the second wireless node to issue a request to transmit.

77. The method of claim 70, further comprising:

defining the control information to enable the second wireless node to schedule a requested data transmission.

79. The method of claim 70, wherein

the grant message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmission power, a quantity of redundancy bits to transmit, code rate, expected channel to interference ratio, receive margin, and a pilot signal.

80. The method of claim 70, wherein

the confirmation message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, packet format, and a pilot signal.

85. The method of claim 70, further comprising scheduling transmission of the control information without transmission of other data.

72. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node; and

scheduling transmission of control information by the first wireless node based on the received information, wherein the control information comprises information that was previously transmitted during the scheduled transmit time period; and

transmitting, after the scheduled transmit time period, the control information.

76. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission b a second wireless node

scheduling transmission of control information by the first wireless node based on the received information, wherein the control information comprises; and

defining the control information to enable the second wireless node to issue a request to transmit;

wherein the second wireless node uses the control information to determine whether a transmission associated with the request to transmit would interfere with reception at the first wireless node during another scheduled transmit time period.

78. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node;

scheduling transmission of control information by the first wireless node based on the received information, wherein the control information comprises; and

defining the control information to enable the second wireless node to schedule a requested data transmission;

wherein the second wireless node schedules the data transmission if the control information indicates that the second wireless node will be able to receive data in a sustainable manner during the scheduled data transmission, taking into consideration potential transmissions by other wireless nodes.

81. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node; and

scheduling transmission of control information by the first wireless node based on the received information;

transmitting or receiving, by the first wireless device, data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one acknowledgement message that is transmitted during the at least one time interval to acknowledge the reception of data during at least one of the time segments; and

wherein the at least one acknowledgement message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmission power for at least one of the time segments, a quantity of redundancy bits to transmit for at least one of the time segments, code rate for at least one of the time segments, expected channel to interference ratio for at least one of the time segments, receive margin, and a pilot signal.

82. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node; and

scheduling transmission of control information by the first wireless node based on the received information;

transmitting or receiving, by the first wireless device, data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one confirmation message that is transmitted during the at least one time interval; and

wherein the at least one confirmation message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmit power delta, packet format, and a pilot signal.

83. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node; and

scheduling transmission of control information by the first wireless node based on the received information;

transmitting or receiving, by the first wireless node, data via a data channel; and

transmitting, by the first wireless node, the control information via a control channel;

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

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

84. A method of wireless communication, comprising:

receiving, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node; and

scheduling transmission of control information by the first wireless node based on the received information;

wherein the control information comprises a resource utilization message comprising at least one of the group consisting of;

a level of desired interference reduction, a resource to be cleared, and an indication of a degree to which reception at the first wireless node is not meeting a desired level of quality of service.

86. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a first wireless node; and

a scheduler configured to schedule transmission of control information by the apparatus based on the received information;

wherein the control information comprises at least one of a grant message in response to a request to transmit from a second wireless node and a confirmation message in response to a grant message from the second wireless node.

87. The apparatus of claim 86, wherein the transmission of the control information commences after the scheduled transmit time period.

88. The apparatus of claim 86, wherein the transmission of the control information comprises transmitting, after the scheduled transmit time period, information that was previously transmitted during the scheduled transmit time period.

89. The apparatus of claim 86, wherein the received information comprises at least one of the group consisting of:

transmission start time, transmission end time, and transmission time period.

90. The apparatus of claim 86, wherein the received information comprises:

a grant message generated in response to a request to transmit, a confirmation message, an acknowledgement message generated to acknowledge receipt of data during the scheduled transmit time period, or a confirmation message transmitted during the scheduled transmit time period.

91. The apparatus of claim 86, further comprising:

a transmission parameter definer configured to define the control information to enable the first wireless node to issue a request to transmit.

93. The apparatus of claim 86, further comprising:

a transmission parameter definer configured to define the control information to enable the first wireless node to schedule a requested data transmission.

95. The apparatus of claim 86, wherein

the grant message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmission power, a quantity of redundancy bits to transmit, code rate, expected channel to interference ratio, receive margin, and a pilot signal.

96. The apparatus of claim 86, wherein

the confirmation message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, packet format, and a pilot signal.

101. The apparatus of claim 86, wherein the scheduler is further configured to schedule transmission of the control information without transmission of other data.

92. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node;

a scheduler configured to schedule transmission of control information by the apparatus based on the received information; and

a transmission parameter definer configured to define the control information to enable the wireless node to issue a request to transmit;

wherein the wireless node uses the control information to determine whether a transmission associated with the request to transmit would interfere with reception at the apparatus during another scheduled transmit time period.

94. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node;

a scheduler configured to schedule transmission of control information by the apparatus based on the received information; and

a transmission parameter definer configured to define the control information to enable the wireless node to schedule a requested data transmission;

wherein the wireless node schedules the data transmission if the control information indicates that the wireless node will be able to receive data in a sustainable manner during the scheduled data transmission, taking into consideration potential transmissions by other wireless nodes.

97. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node and to receive data during a plurality of time segments defined within another scheduled transmit time period; and

a scheduler configured to schedule transmission of control information by the apparatus based on the received information;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one acknowledgement message that is transmitted during the at least one time interval to acknowledge the reception of data during at least one of the time segments; and

wherein the at least one acknowledgement message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmission power for at least one of the time segments, a quantity of redundancy bits to transmit for at least one of the time segments, code rate for at least one of the time segments, expected channel to interference ratio for at least one of the time segments, receive margin, and a pilot signal.

98. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node and to receive data during a plurality of time segments defined within another scheduled transmit time period; and

a scheduler configured to schedule transmission of control information by the apparatus based on the received information;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one confirmation message that is transmitted during the at least one time interval; and

wherein the at least one confirmation message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmit power delta, packet format, and a pilot signal.

99. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node and to receive data via a data channel;

a scheduler configured to schedule transmission of control information by the apparatus based on the received information; and

a transmitter configured to transmit the control information via a control channel;

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

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

100. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node; and

a scheduler configured to schedule transmission of control information by the apparatus based on the received information;

wherein the control information comprises a resource utilization message comprising at least one of the group consisting of;

a level of desired interference reduction, a resource to be cleared, and an indication of a degree to which reception at the apparatus is not meeting a desired level of quality of service.

102. An apparatus for wireless communication, comprising:

means for receiving information relating to a scheduled transmit time period of a transmission by a first wireless node; and

means for scheduling transmission of control information by the apparatus based on the received information;

wherein the control information comprises at least one of a grant message in response to a request to transmit from a second wireless node and a confirmation message in response to a grant message from the second wireless node.

103. The apparatus of claim 102, wherein the transmission of the control information commences after the scheduled transmit time period.

104. The apparatus of claim 102, wherein the transmission of the control information comprises transmitting, after the scheduled transmit time period, information that was previously transmitted during the scheduled transmit time period.

105. The apparatus of claim 102, wherein the received information comprises at least one of the group consisting of:

transmission start time, transmission end time, and transmission time period.

106. The apparatus of claim 102, wherein the received information comprises:

a grant message generated in response to a request to transmit, a confirmation message, an acknowledgement message generated to acknowledge receipt of data during the scheduled transmit time period, or a confirmation message transmitted during the scheduled transmit time period.

107. The apparatus of claim 102, further comprising:

means for defining the control information to enable the wireless node to issue a request to transmit.

109. The apparatus of claim 102, further comprising:

means for defining the control information to enable the first wireless node to schedule a requested data transmission.

111. The apparatus of claim 102, wherein

the grant message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmission power, a quantity of redundancy bits to transmit, code rate, expected channel to interference ratio, receive margin, and a pilot signal.

112. The apparatus of claim 102, wherein

the confirmation message comprises at least one of the group consisting of:

transmission start time, transmission end time, transmission time period, transmit power delta, packet format, and a pilot signal.

108. An apparatus for wireless communication, comprising:

means for receiving information relating to a scheduled transmit time period of a transmission by a wireless node; and

means for scheduling transmission of control information by the apparatus based on the received information; and

means for defining the control information to enable the wireless node to issue a request to transmit;

wherein the wireless node uses the control information to determine whether a transmission associated with the request to transmit would interfere with reception at the apparatus during another scheduled transmit time period.

110. An apparatus for wireless communication, comprising:

means for receiving information relating to a scheduled transmit time period of a transmission by a wireless node; and

means for scheduling transmission of control information by the apparatus based on the received information; and

means for defining the control information to enable the wireless node to schedule a requested data transmission;

wherein the wireless node schedules the data transmission if the control information indicates that the wireless node will be able to receive data in a sustainable manner during the scheduled data transmission, taking into consideration potential transmissions by other wireless nodes.

113. An apparatus for wireless communication, comprising:

means for receiving information relating to a scheduled transmit time period of a transmission by a wireless node;

means for scheduling transmission of control information by the apparatus based on the received information; and

means for receiving or transmitting data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one acknowledgement message that is transmitted during the at least one time interval to acknowledge the reception of data during at least one of the time segments; and

wherein the at least one acknowledgement message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmission power for at least one of the time segments, a quantity of redundancy bits to transmit for at least one of the time segments, code rate for at least one of the time segments, expected channel to interference ratio for at least one of the time segments, receive margin, and a pilot signal.

114. An apparatus for wireless communication, comprising:

means for receiving information relating to a scheduled transmit time period of a transmission by a wireless node;

means for scheduling transmission of control information by the apparatus based on the received information; and

means for receiving or transmitting data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one confirmation message that is transmitted during the at least one time interval; and

wherein the at least one confirmation message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmit power delta, packet format, and a pilot signal.

115. An apparatus for wireless communication, comprising:

means for receiving information relating to a scheduled transmit time period of a transmission by a wireless node;

means for scheduling transmission of control information by the apparatus based on the received information;

means for receiving or transmitting data via a data channel; and

means for transmitting the control information via a control channel;

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

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

116. An apparatus for wireless communication, comprising:

means for receiving information relating to a scheduled transmit time period of a transmission by a wireless node; and

means for scheduling transmission of control information by the apparatus based on the received information;

wherein the control information comprises a resource utilization message comprising at least one of the group consisting of;

a level of desired interference reduction, a resource to be cleared, and an indication of a degree to which reception at the apparatus is not meeting a desired level of quality of service.

117. A computer-program product for wireless communication, comprising:

non-transitory computer-readable storage medium comprising codes executable by at least one computer to;

receive, at a first wireless node, information relating to a scheduled transmit time period of a transmission by a second wireless node; and

schedule transmission of control information by the first wireless node based on the received information;

wherein the control information comprises at least one of a grant message in response to a request to transmit from a third wireless node and a confirmation message in response to a grant message from the third wireless node.

118. An access point for wireless communication, comprising:

an antenna;

a receiver configured to receive via the antenna information relating to a scheduled transmit time period of a transmission by a first wireless node; and

a controller configured to schedule transmission of control information by the access point based on the received information;

wherein the control information comprises at least one of a grant message in response to a request to transmit from a second wireless node and a confirmation message in response to a grant message from the second wireless node.

119. An access terminal for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a first wireless node; and

a controller configured to schedule transmission of control information by the access terminal based on the received information; and

a user interface configured to output an indication based on data received by the receiver;

wherein the control information comprises at least one of a grant message in response to a request to transmit from a second wireless node and a confirmation message in response to a grant message from the second wireless node.

120. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node; and

a scheduler configured to schedule transmission of control information by the apparatus based on the received information; and

a transmitter configured to transmit data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one acknowledgement message that is transmitted during the at least one time interval to acknowledge the reception of data during at least one of the time segments; and

wherein the at least one acknowledgement message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmission power for at least one of the time segments, a quantity of redundancy bits to transmit for at least one of the time segments, code rate for at least one of the time segments, expected channel to interference ratio for at least one of the time segments, receive margin, and a pilot signal.

121. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node; and

a scheduler configured to schedule transmission of control information by the apparatus based on the received information;

a transmitter configured to transmit data during a plurality of time segments defined within another scheduled transmit time period;

wherein at least one time interval for transmission or reception of control information is temporally located between the time segments;

wherein the control information comprises at least one confirmation message that is transmitted during the at least one time interval; and

wherein the at least one confirmation message comprises at least one of the group consisting of;

transmission start time for at least one of the time segments, transmission end time for at least one of the time segments, transmission time period for at least one of the time segments, transmit power delta, packet format, and a pilot signal.

122. An apparatus for wireless communication, comprising:

a receiver configured to receive information relating to a scheduled transmit time period of a transmission by a wireless node;

a scheduler configured to schedule transmission of control information by the apparatus based on the received information; and

a transmitter configured to transmit the control information via a control channel and to transmit data via a data channel;

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

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