Managing distributed access to a shared medium

• US 9,413,688 B2
• Filed: 06/21/2013
• Issued: 08/09/2016
• Est. Priority Date: 05/10/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Katar, Srinivas, Yonge, Lawrence Winston III, Krishnam, Manjunath Anandarama, Lynch, Bradley Robert, Tahir, Ehab
• Primary Examiner(s): HUYNH, KHOA B
• Application Number:
  US13/924,301
• Publication Number:
  US 20130287040A1
• Time in Patent Office: 1,145 Days
• Field of Search: 370/229, 370/235, 370/236, 370/241, 370/252, 370/276, 370/294, 370/310, 370/328, 370/329, 370/336, 370/351, 370/389, 370/392, 370/431, 370/445, 370/447, 370/448, 370/458, 370/461, 370/462, 709/223, 709/224, 709/225, 709/226, 709/230, 709/232, 709/235, 714/100, 714/1, 714/2, 714/3, 714/4
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 2001/0094 Bus
• CPC Class Codes: H04L 47/826 Involving periods of time

Abstract

A method includes determining that a first station has been allocated a first time period to transmit over a shared medium in a network. The method includes transmitting, from the first station to a second station over the shared medium during the first time period, wherein stations other than the first station and the second station refrain from transmitting over the shared medium during the first time period. The method includes receiving, from the second station, a request message to allow the second station to transmit during the first time period and a requested amount of time to transmit. The method includes, in response to allowing the second station to transmit during the first time period, determining an authorized amount of time for the second station to transmit during the first time period, and transmitting an authorization message for the second station to transmit and the authorized amount of time.

Claims

1. A method for communicating between a first station and a second station in a network, the method comprising:

determining that the first station has been allocated a first time period to transmit over a shared medium in the network;

transmitting a first data block, from the first station to the second station over the shared medium during the first time period;

receiving, from the second station by the first station, a first acknowledgement of the first data block, wherein the first acknowledgement includes a request to allow the second station to transmit a burst of multiple burst data blocks during the first time period, wherein the request comprises a count value of a number of the multiple burst data blocks;

determining, by the first station, to allow the second station to transmit during the first time period;

in response to determining to allow the second station to transmit during the first time period,

transmitting, by the first station to the second station, an authorization message for the second station to transmit the burst of multiple burst data blocks during the first time period, wherein transmissions of the multiple burst data blocks from the second station to the first station include the count value, wherein the count value decreases in each subsequent burst data block of the multiple burst data blocks; and

transmitting, by the first station to the second station, a burst acknowledgement after receiving a burst data block of the multiple burst data blocks having the count value that indicates a last burst data block has been received.

2. The method of claim 1, further comprising determining that the second station has been allocated a second time period that is non-overlapping with the first time period.

3. The method of claim 1, wherein the first station does not transmit other burst acknowledgments for other burst data blocks of the multiple burst data blocks.

4. The method of claim 1, further comprising receiving, by the first station from the second station, the multiple burst data blocks, wherein at least one of the multiple burst data blocks comprises a second acknowledgement of a second data block received from the first station by the second station.

5. The method of claim 4, wherein the authorization message is included in the second data block being transmitted from the first station to the second station, wherein the method comprises:

receiving, by the first station from the second station, the multiple burst data blocks after transmitting the second data block, wherein an interframe space that defines a delay is positioned between the second data block and the multiple burst data blocks.

6. The method of claim 4, wherein an indicator signaling an end of the first time period is included in at least one of a last acknowledgement, and a last data block transmitted by either the first station or the second station.

7. The method of claim 1, further comprising:

receiving, by the first station from the second station, subsequent acknowledgements for other data blocks transmitted to the second station, wherein the subsequent acknowledgements include the request until the first station allows the second station to transmit during the first time period.

8. The method of claim 1, further comprising:

prior to transmitting the first data block, setting a field included in the first data block to indicate that control of the shared medium will not be relinquished by the first station after the burst has been transmitted.

9. A method for communicating between stations a first station and a second station in a network, the method comprising:

determining that the first station has been allocated a first time period to transmit over a shared medium in the network;

transmitting a first data block, from the first station to the second station over the shared medium during the first time period;

receiving, from the second station by the first station, a first acknowledgement of the first data block, wherein the first acknowledgement includes a request to allow the second station to transmit a burst of multiple burst data blocks during the first time period, wherein the request comprises a count value of a number of the multiple burst data blocks;

in response to receiving, by the first station, the first acknowledgement from the second station,

transmitting, by the first station, an authorization message to the second station to transmit the burst of multiple burst data blocks during the first time period; and

transmitting, by the first station to the second station, a burst acknowledgement after receiving a burst data block of the multiple burst data blocks having the count value that indicates a last burst data block has been received.

10. The method of claim 9, further comprising determining that the second station has been allocated a second time period that is non-overlapping with the first time period.

11. The method of claim 9, wherein transmissions of the multiple burst data blocks from the second station to the first station include the count value, wherein the count value decreases in each subsequent burst data block of the multiple burst data blocks.

12. The method of claim 9, wherein the first station does not transmit other burst acknowledgments for other burst data blocks of the multiple burst data blocks.

13. The method of claim 9, further comprising receiving, by the first station from the second station, the multiple burst data blocks, wherein at least one of the multiple burst data blocks comprises a second acknowledgement of a second data block received from the first station by the second station.

14. The method of claim 9, further comprising receiving, by the first station from the second station, subsequent acknowledgements for other data blocks transmitted to the second station, wherein the subsequent acknowledgements include the request until the first station allows the second station to transmit during the first time period.

15. A station in a network for communications, the station comprising:

a network interface module having a transmitter and a receiver, the network interface module configured to,

determine that the station has been allocated a first time period to transmit over a shared medium in the network based, at least in part, on a contention period to determine selection among stations that include the station;

transmit, via the transmitter, a first data block to a different station in the network over the shared medium during the first time period, wherein the stations in the network, other than the station and the different station, refrain from transmission over the shared medium during the first time period;

receive, via the receiver from the different station, a first acknowledgement of the first data block, wherein the first acknowledgement includes a request to allow the different station to transmit a burst of multiple burst data blocks during the first time period, wherein the request comprises a count value of a number of the multiple burst data blocks;

determine whether to allow the different station to transmit during the first time period; and

in response to allowance of the different station to transmit during the first time period,

transmit, via the transmitter to the different station, an authorization message for the different station to transmit the burst of multiple burst data blocks during the first time period, wherein transmissions of the multiple burst data blocks from the different station to the station include the count value, wherein the count value decreases in each subsequent burst data block of the multiple burst data blocks; and

transmitting, by the station, a burst acknowledgement after receipt of a burst data block of the multiple burst data blocks having the count value that indicates a last burst data block has been received.

16. The station of claim 15, wherein the network interface module is configured to determine that the different station has been allocated a second time period that is non-overlapping with the first time period.

17. The station of claim 15, wherein the station does not transmit other burst acknowledgments for other burst data blocks of the multiple burst data blocks.

18. The station of claim 15, wherein the network interface module is further configured to,

receive, via the receiver from the different station, the multiple burst data blocks, wherein at least one of the multiple burst data blocks comprises a second acknowledgement of a second data block received from the station by the different station.

19. The station of claim 18, wherein the authorization message is included in the second data block to be transmitted to the different station, wherein the network interface module is further configured to,

receive, via the receiver from the different station, the multiple burst data blocks after transmission of the second data block, wherein an interframe space that defines a delay is positioned between the second data block and the multiple burst data blocks.

20. The station of claim 18, wherein an indicator to signal an end of the first time period is included in at least one of a last acknowledgement, and a last data block transmitted by either the station or the different station.

21. The station of claim 15, wherein the network interface module is configured to,

receive, via the receiver from the different station, subsequent acknowledgements for other data blocks transmitted to the different station, wherein the subsequent acknowledgements include the request until the station allows the different station to transmit during the first time period.

22. The station of claim 15,

wherein the network interface module is further configured to,

prior to transmission of the first data block, set a field that is included as part of the transmission of the first data block to indicate that control of the shared medium will not be relinquished by the station after the burst has been transmitted.

23. A station in a network for communications, the station comprising:

a network interface module having a transmitter and a receiver, the network interface module configured to,

determine that the station has been allocated a first time period to transmit over a shared medium in the network based, at least in part, on a contention period to determine selection among the station and other stations in the network;

transmit, via the transmitter, a first data block to a different station of the other stations over the shared medium during the first time period, wherein the stations in the network other than the station and the different station refrain from transmitting over the shared medium during the first time period;

receive, via the receiver from the different station, a first acknowledgement of the first data block, wherein the first acknowledgement includes a request to allow the different station to transmit a burst of multiple burst data blocks during the first time period, wherein the request comprises a count value of a number of the multiple burst data blocks;

in response to receipt of the first acknowledgement from the different station,

transmit, via the transmitter, an authorization message to the different station to transmit the burst of multiple burst data blocks during the first time period; and

transmit, via the transmitter, a burst acknowledgement after receipt of a burst data block of the multiple burst data blocks having the count value that indicates a last burst data block has been received.

24. The station of claim 23, wherein the network interface module is configured to determine that the different station has been allocated a second time period that is non-overlapping with the first time period.

25. The station of claim 23, wherein transmissions of the multiple burst data blocks from the different station to the station include the count value, wherein the count value decreases in each subsequent burst data block of the multiple burst data blocks.

26. The station of claim 23, wherein the station is to not transmit other burst acknowledgments for other burst data blocks of the multiple burst data blocks.

27. The station of claim 23, wherein the network interface module is configured to,

receive, via the receiver from the different station, the multiple burst data blocks, wherein at least one of the multiple burst data blocks comprises a second acknowledgement of a second data block received from the station by the different station.

28. The station of claim 23, wherein the network interface module is configured to,

receive, via the receiver from the different station, subsequent acknowledgements for other data blocks transmitted to the different station, wherein the subsequent acknowledgements include the request until the station allows the different station to transmit during the first time period.