TECHNIQUES FOR SIMULTANEOUS TRANSMITTING AND RECEIVING OF PACKETS IN A WIRELESS LOCAL AREA NETWORK

• US 20140362838A1
• Filed: 06/05/2013
• Published: 12/11/2014
• Est. Priority Date: 06/05/2013
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Yang-Seok Choi
• Inventors: Choi, Yang-Seok
• Granted Patent: US 9,544,100 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 1/1657 Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
• CPC Class Codes: H04L 1/1664 the supervisory signal being transmitted together with payload signals; piggybacking
• CPC Class Codes: H04L 1/188 Time-out mechanisms

Abstract

Examples are disclosed for simultaneous transmitting and receiving packets in a wireless local access network (WLAN). In some examples, a source node in the WLAN may transmit a packet to a destination node in the WLAN and may receive an implicit acknowledgement (ACK) packet from the destination node. The source node may stop transmitting a remaining portion of the packet if the implicit ACK packet is not received within a defined time interval or if a dummy/packet payload for the implicit ACK packet is not successfully decoded. Also, the destination node may or may not include a data payload in an implicit ACK packet sent responsive to receiving the packet from the source node. Other examples are described and claimed.

Claims

1. An apparatus for a source node in a wireless local area network (WLAN) comprising:

circuitry;

a transmit component for execution by the circuitry to transmit a packet having a first header and a first data payload to a destination node in the WLAN;

a receive component for execution by the circuitry, the receive component to wait for receipt of an implicit acknowledgement (ACK) packet having a second header from the destination node, the implicit ACK packet to indicate receipt of at least the first header by the destination node; and

a stop component for execution by the circuitry to cause the transmit component to stop transmission of any remaining portion of the first data payload awaiting transmission when the stop component has determined that the second header for the implicit ACK packet has not been received within a defined time interval.

2. The apparatus of claim 1, comprising:

one or more antennas; and

a simultaneous transmit and receive (STR) component coupled to the one or more antennas, the STR component for execution by the circuitry to enable the transmit component to transmit at least portions of the packet to the destination node while the receive component receives the implicit ACK packet from the destination node.

3. The apparatus of claim 1, receipt of the implicit ACK packet by the receive component comprises the receive component capable of receiving and successfully decoding at least the second header and determining that the implicit ACK packet was transmitted from the destination node.

4. The apparatus of claim 3, the defined time comprising a given time interval associated with the receive component receiving and successfully decoding at least the second header.

5. The apparatus of claim 1, comprising the source node, the destination node and other nodes in the WLAN capable of implementing carrier sense multiple access (CSMA) for transmitting packets via the WLAN, the implicit ACK packet also having a dummy payload, the implicit ACK packet having the dummy payload to indicate to the other nodes in the WLAN a communication link is being used by the source node for a given time associated with the transmit component transmitting the packet to the destination node.

6. The apparatus of claim 5, comprising the stop component to cause the transmit component to stop transmission of any remaining portion of the first data payload awaiting transmission if the stop component has determined that at least a portion of the dummy payload has not been received and successfully decoded by the receive component.

7. The apparatus of claim 1, comprising the source node, the destination node and other nodes in the WLAN capable of implementing carrier sense multiple access (CSMA) for transmitting packets via the WLAN, the implicit ACK packet also having a second data payload including data destined for the source node, the implicit ACK packet having the second data payload to indicate to the other nodes in the WLAN a communication link is being used by the source node for a given time associated with the transmit component transmitting the packet to the destination node.

8. The apparatus of claim 7, comprising the stop component to cause the transmit component to stop transmission of any remaining portion of the first data payload awaiting transmission if the stop component has determined that at least a portion of the second data payload has not been received and successfully decoded by the receive component.

15. The method of claim 8, comprising the source node, the destination node and other nodes in the WLAN capable of implementing carrier sense multiple access (CSMA) for transmitting packets via the WLAN, the implicit ACK packet also having a combination of a dummy payload and a second data payload including data destined for the source node, the implicit ACK packet having the combination of the dummy payload and the second data payload to indicate to the other nodes in the WLAN a communication link is being used by the source node for a given time associated with the source node transmitting the packet to the destination node.

16. The method of claim 15, comprising the source and the destination nodes belonging to a first cell of multiple cells included in the WLAN and the other nodes including at least one node from a second cell from among the multiple cells.

9. A method implemented at a source node in a wireless local area network (WLAN) comprising:

transmitting, at the source node, a packet having a first header and a first data payload to a destination node in the WLAN;

continuing to transmit the first data payload to the destination node based on whether at least a second header for an implicit acknowledgement (ACK) packet has been received from the destination node to indicate receipt of at least the first header by the destination node; and

stopping transmission of a remaining portion of the first data payload awaiting transmission if the second header for the implicit ACK packet has not been received within a defined time interval.

10. The method of claim 9, successfully decoding at least the second header comprises the source node capable of determining that the implicit ACK packet was transmitted from the destination node and the defined time interval associated with a given time interval for the source node to make the determination.

11. The method of claim 9, comprising the source node, the destination node and other nodes in the WLAN capable of implementing carrier sense multiple access (CSMA) for transmitting packets via the WLAN, the implicit ACK packet also having a dummy payload, the implicit ACK packet having the dummy payload to indicate to the other nodes in the WLAN a communication link is being used by the source node for a given time associated with the source node transmitting the packet to the destination node.

12. The method of claim 11, comprising the source and the destination nodes belonging to a first cell of multiple cells included in the WLAN and the other nodes including at least one node from a second cell from among the multiple cells.

13. The method of claim 9, comprising the source node, the destination node and other nodes in the WLAN capable of implementing carrier sense multiple access (CSMA) for transmitting packets via the WLAN, the implicit ACK packet also having a second data payload including data destined for the source node, the implicit ACK packet having the second data payload to indicate to the other nodes in the WLAN a communication link is being used by the source node for a given time associated with the source node transmitting the packet to the destination node.

14. The method of claim 13, comprising the source and the destination nodes belonging to a first cell of multiple cells included in the WLAN and the other nodes including at least one node from a second cell from among the multiple cells.

17. The method of claim 9, comprising the WLAN capable of operating in compliance with one or more wireless communication standards or specifications associated with the Institute of Electrical and Electronic Engineers (IEEE) 802.11 standards.

18. The method of claim 17, comprising the source node is a terminal node and the destination node is an access point.

19. An apparatus for a destination node in a wireless local area network (WLAN) comprising:

circuitry;

a receive component for execution by the circuitry to receive a packet including a first header and a first data payload from a source node in the WLAN;

a generate component for execution by the circuitry to generate an implicit acknowledgement (ACK) packet having a second header, the implicit ACK packet to include either a dummy payload if no data is awaiting transmission to the source node or a second data payload if data is awaiting transmission to the source node; and

a transmit component for execution by the circuitry to transmit the implicit ACK packet to the source node following successful decoding of the first header and concurrent with receiving and decoding the first data payload included in the packet received from the source node.

20. The apparatus of claim 19, comprising:

one or more antennas; and

a simultaneous transmit and receive (STR) component coupled to the one or more antennas, the STR component for execution by the circuitry to enable the receive component to receive the packet from the source node while the transmit component transmits the implicit ACK packet to the source node.

21. The apparatus of claim 19, comprising the destination node, the source node and other nodes in the WLAN capable of implementing carrier sense multiple access (CSMA) for transmitting packets via the WLAN and the dummy payload or the second data payload to indicate to the other nodes in the WLAN a communication link is being used by the source node for a given time associated with the source node transmitting the packet to the destination node.

22. The apparatus of claim 19, comprising:

the generate component to determine that data has become available after at least a first portion of the dummy payload has been transmitted by the transmit component and replace a second portion of the dummy payload awaiting transmission with a third header associated with the available data and a third data payload including at least some of the available data; and

the transmit component to transmit the second portion to the source node that includes the third header and the third data payload.

23. The apparatus of claim 22, comprising the destination node, the source node and other nodes in the WLAN capable of implementing carrier sense multiple access (CSMA) for transmitting packets via the WLAN and the first portion of the dummy payload, the third header, and the third data payload to indicate to the other nodes in the WLAN a communication link is being used by the source node for a given time associated with the source node transmitting the packet to the destination node.

24. At least one machine readable medium comprising a plurality of instructions that in response to being executed on a system a destination node in a wireless local area network (WLAN) cause the system to:

receive a packet including a first header and a first data payload from a source node in the WLAN;

generate an implicit acknowledgement (ACK) packet having a second header, the implicit ACK packet to include a dummy payload if no data is awaiting transmission to the source node; and

transmit the implicit ACK packet to the source node following successful decoding of the first header and concurrent with receiving and decoding the first data payload included in the packet received from the source node.

27. The at least one machine readable medium of claim 24, comprising the instructions to also cause the system to:

determine that data has become available after at least a first portion of the dummy payload has been transmitted;

replace a second portion of the dummy payload awaiting transmission with a third header associated with the available data and a second data payload including at least some of the available data; and

transmit the second portion to the source node that includes the third header and the second data payload.

25. (canceled)

26. (canceled)

28. (canceled)