Method and apparatus for extended reverse direction grant in a wireless local area network (WLAN)

• US 9,450,711 B2
• Filed: 01/29/2009
• Issued: 09/20/2016
• Est. Priority Date: 04/02/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sridhara, Vinay, Nanda, Sanjiv, Abraham, Santosh P., Kandala, Srinivas
• Primary Examiner(s): Wu, Jianye
• Application Number:
  US12/361,773
• Publication Number:
  US 20090252110A1
• Time in Patent Office: 2,791 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04W 74/06 using polling
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Systems, methods, and apparatus for extended reverse direction grant in a WLAN are provided. In one aspect, a method for communication using a channel that is common to a plurality of nodes is provided. The method includes transmitting first data to the plurality of nodes using a first transmission resource. The first data is transmitted within a transmit opportunity time interval and comprises a first indicator. The method further includes receiving, in response to the first indicator, at least one data transmission from at least one of the nodes, respectively. The at least one data transmitted using at least one second transmission resource, respectively, and is received within the transmit opportunity time interval.

Claims

1. A method for communication using a channel that is common to a plurality of nodes, the method comprising:

transmitting first data to the plurality of the nodes using a first transmission resource, wherein the first data is transmitted within a transmit opportunity time interval granted for transmitting the first data to the plurality of the nodes via the channel and comprises a first indicator, and wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes; and

receiving, in response to the first indicator, at least one data transmission from at least one of the nodes, respectively, wherein the at least one data transmission was transmitted using at least one second transmission resource, respectively, and is received within the transmit opportunity time interval.

2. The method of claim 1, further comprising generating the first data to comprise at least one resource identifier that identifies the at least one second transmission resource, respectively.

3. The method of claim 2, wherein the first indicator comprises the at least one resource identifier.

4. The method of claim 1, wherein the first indicator comprises a selected bit associated with the first data that is set to a first state.

5. The method of claim 1, wherein the first transmission resource comprises at least one resource selected from a set comprising space, frequency, time, and code division resources.

6. The method of claim 1, wherein the at least one second transmission resource comprises at least one resource selected from a set comprising space, frequency, time, and code division resources.

7. The method of claim 1, wherein a first data transmission of the at least one data transmission received from a first node of the at least one of the nodes is received simultaneously with receiving a second data transmission of the at least one data transmission from a second node of the at least one of the nodes.

8. An apparatus for communication using a channel that is common to a plurality of nodes, the apparatus comprising:

a transmitter configured to transmit first data to the plurality of the nodes using a first transmission resource, wherein the first data is transmitted within a transmit opportunity time interval granted for transmitting the first data to the plurality of the nodes via the channel and comprises a first indicator, and wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes; and

a receiver configured to receive, in response to the first indicator, at least one data transmission from at least one of the nodes, respectively, wherein the at least one data transmission was transmitted using at least one second transmission resource, respectively, and is received within the transmit opportunity time interval.

9. The apparatus of claim 8, wherein said transmitter is configured to generate the first data to comprise at least one resource identifier that identifies the at least one second transmission resource, respectively.

10. The apparatus of claim 9, wherein the first indicator comprises the at least one resource identifier.

11. The apparatus of claim 8, wherein the first indicator comprises a selected bit associated with the first data that is set to a first state.

12. The apparatus of claim 8, wherein the first transmission resource comprises at least one resource selected from a set comprising space, frequency, time, and code division resources.

13. The apparatus of claim 8, wherein the at least one second transmission resource comprises at least one resource selected from a set comprising space, frequency, time, and code division resources.

14. The apparatus of claim 8, wherein a first data transmission of the at least one data transmission received from a first node of the at least one of the nodes is received simultaneously with receiving a second data transmission of the at least one data transmission from a second node of the at least one of the nodes.

15. An apparatus for communication using a channel that is common to a plurality of nodes, the apparatus comprising:

means for transmitting first data to the plurality of the nodes using a first transmission resource, wherein the first data is transmitted within a transmit opportunity time interval granted for transmitting the first data to the plurality of the nodes via the channel and comprises a first indicator, and wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes; and

means for receiving, in response to the first indicator, at least one data transmission from at least one of the nodes, respectively, wherein the at least one data transmission was transmitted using at least one second transmission resource, respectively, and is received within the transmit opportunity time interval.

16. The apparatus of claim 15, wherein said means for transmitting operates to generate the first data to comprise at least one resource identifier that identifies the at least one second transmission resource, respectively.

17. The apparatus of claim 16, wherein the first indicator comprises the at least one resource identifier.

18. The apparatus of claim 15, wherein the first indicator comprises a selected bit associated with the first data that is set to a first state.

19. The apparatus of claim 15, wherein the first transmission resource comprises at least one resource selected from a set comprising space, frequency, time, and code division resources.

20. The apparatus of claim 15, wherein the at least one second transmission resource comprises at least one resource selected from a set comprising space, frequency, time, and code division resources.

21. The apparatus of claim 15, wherein a first data transmission of the at least one data transmission received from a first node of the at least one of the nodes is received simultaneously with receiving a second data transmission of the at least one data transmission from a second node of the at least one of the nodes.

22. A computer program product for communication using a channel that is common to a plurality of nodes, the computer program product comprising:

a non-transitory computer-readable storage medium encoded with codes executable to;

transmit first data to the plurality of the nodes using a first transmission resource, wherein the first data is transmitted within a transmit opportunity time interval granted for transmitting the first data to the plurality of the nodes via the channel and comprises a first indicator, and wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes; and

receive, in response to the first indicator, at least one data transmission from at least one of the nodes, respectively, wherein the at least one data transmission was transmitted using at least one second transmission resource, respectively, and is received within the transmit opportunity time interval.

23. An access point for communication using a channel that is common to a plurality of nodes, the access point comprising:

an antenna;

a transmitter coupled to the antenna and configured to transmit first data to the plurality of the nodes using a first transmission resource, wherein the first data is transmitted within a transmit opportunity time interval granted for transmitting the first data to the plurality of the nodes via the channel and comprises a first indicator, and wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes; and

a receiver configured to receive, in response to the first indicator, at least one data transmission from at least one of the nodes, respectively, wherein the at least one data transmission was transmitted using at least one second transmission resource, respectively, and is received within the transmit opportunity time interval.

24. A method for communication using a channel that is common to a plurality of nodes, the method comprising:

receiving, at a first node of the plurality of nodes, a first data communication over the common channel, the first data communication being decodable by other nodes of the plurality of nodes and is received within a transmit opportunity time interval granted for transmitting the first data communication to the plurality of the nodes via the channel;

determining whether the first data communication comprises a first indicator, wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes; and

transmitting a second data communication within the transmit opportunity time interval using selected transmission resources, if the first data communication comprises the first indicator.

25. The method of claim 24, further comprising identifying the selected transmission resources by a resource identifier in the first data communication.

26. The method of claim 25, wherein the first indicator comprises the resource identifier.

27. The method of claim 24, wherein the first indicator comprises a selected bit associated with the first data communication that is set to a first state.

28. The method of claim 24, further comprising determining the selected transmission resources from parameters associated with the first data communication.

29. The method of claim 24, wherein the selected transmission resources comprise some of space, frequency, time, and code division resources.

30. The method of claim 24, wherein the second data communication is configured to be transmitted simultaneously with data communications from the plurality of nodes.

31. An apparatus for communication using a channel that is common to the apparatus and a plurality of nodes, the apparatus comprising:

a receiver configured to receive a first data communication over the common channel, the first data communication being decodable by the plurality of nodes and the apparatus and is received within a transmit opportunity time interval granted for transmitting the first data communication to the plurality of the nodes and the apparatus via the channel;

a controller configured to determine whether the first data communication comprises a first indicator, wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes and the apparatus; and

a transmitter configured to transmit a second data communication within the transmit opportunity time interval using selected transmission resources, if the first data communication comprises the first indicator.

32. The apparatus of claim 31, wherein said controller is configured to identify the selected transmission resources by a resource identifier in the first data communication.

33. The apparatus of claim 32, wherein the first indicator comprises the resource identifier.

34. The apparatus of claim 31, wherein the first indicator comprises a selected bit associated with the first data communication that is set to a first state.

35. The apparatus of claim 31, wherein said controller is configured to determine the selected transmission resources from parameters associated with the first data communication.

36. The apparatus of claim 31, wherein the selected transmission resources comprise some of space, frequency, time, and code division resources.

37. The apparatus of claim 31, wherein the second data communication is configured to be transmitted simultaneously with data communications from the plurality of nodes.

38. An apparatus for communication using a channel that is common to the apparatus and a plurality of nodes, the apparatus comprising:

means for receiving a first data communication over the common channel, the first data communication being decodable by the plurality of nodes and the apparatus and is received within a transmit opportunity time interval granted for transmitting the first data communication to the plurality of the nodes and the apparatus via the channel;

means for determining whether the first data communication comprises a first indicator, wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes and the apparatus; and

means for transmitting a second data communication within the transmit opportunity time interval using selected transmission resources, if the first data communication comprises the first indicator.

39. The apparatus of claim 38, further comprising means for identifying the selected transmission resources by a resource identifier in the first data communication.

40. The apparatus of claim 39, wherein the first indicator comprises the resource identifier.

41. The apparatus of claim 38, wherein the first indicator comprises a selected bit associated with the first data communication that is set to a first state.

42. The apparatus of claim 38, further comprising means for determining the selected transmission resources from parameters associated with the first data communication.

43. The apparatus of claim 38, wherein the selected transmission resources comprise some of space, frequency, time, and code division resources.

44. The apparatus of claim 38, wherein the second data communication is configured to be transmitted simultaneously with data communications from the plurality of nodes.

45. A computer program product for communication using a channel that is common to a plurality of nodes, the computer program product comprising:

a non-transitory computer-readable storage medium encoded with codes executable to;

receive, at a first node of the plurality of nodes, a first data communication over the common channel, the first data communication being decodable by other nodes of the plurality of nodes and is received within a transmit opportunity time interval granted for transmitting the first data communication to the plurality of the nodes via the channel;

determine whether the first data communication comprises a first indicator, wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes; and

transmit a second data communication within the transmit opportunity time interval using selected transmission resources, if the first data communication comprises the first indicator.

46. An access terminal for communication using a channel that is common to the access terminal and a plurality of nodes, the access terminal comprising:

an antenna;

a receiver configured to receive a first data communication over the common channel, the first data communication being decodable by the plurality of nodes and the access terminal and is received within a transmit opportunity time interval granted for transmitting the first data communication to the plurality of the nodes and the access terminal via the channel;

a controller configured to determine whether the first data communication comprises a first indicator, wherein the first indicator indicates that a remaining portion of the transmit opportunity time interval is available for transmission by the plurality of the nodes and the access terminal; and

a transmitter to transmit via the antenna a second data communication within the transmit opportunity time interval using selected transmission resources, if the first data communication comprises the first indicator.