System and method for full-duplex media access control using request-to-send signaling

• US 10,447,495 B2
• Filed: 04/02/2018
• Issued: 10/15/2019
• Est. Priority Date: 09/14/2012
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Aggarwal, Vaneet, Jana, Rittwik, Rice, Christopher W., Shankaranarayanan, Nemmara K.
• Primary Examiner(s): Javaid, Jamal
• Application Number:
  US15/942,885
• Publication Number:
  US 20180270081A1
• Time in Patent Office: 561 Days
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 12/40013 Details regarding a bus controller
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

A system and method for full-duplex communications provided by modifying the Media Access Control sub-layer of communication node protocols. The modification allows communication nodes to communicate with one another in full-duplex, where each node transmits and receives data simultaneously with other nodes in a single frequency. A timing of the simultaneous data transmissions, acknowledgments, and short-interframe-space waiting periods can be determined based on network-allocation-vector data transmitted in association with request-to-send or clear-to-send signals.

Claims

1. A method comprising:

transmitting, from a first node and to a second node, a first data on a frequency channel while receiving, at the first node, a second data from the second node on the frequency channel, to yield full duplex data communications between the first node and the second node; and

after transmitting the first data to the second node and waiting a dynamically updated short-interframe-space waiting period during which time no data is transmitted by the first node or the second node, transmitting, from the first node to the second node, an acknowledgement indicating reception of the second data while receiving data at the first node, the data being received from the second node.

2. The method of claim 1, wherein the transmitting of the acknowledgment and the transmitting of the first data occur in the frequency channel.

3. The method of claim 1, wherein the transmitting of the acknowledgement and the transmitting of the first data occur in distinct frequency channels.

4. The method of claim 1, further comprising transmitting the first data and receiving the second data only after waiting, after receiving a response indicating availability, a short-interframe-space time.

5. The method of claim 1, wherein the second data was taken out-of-order from a queue associated with the second node.

6. The method of claim 1, wherein the first data and the second data have one of identical packet sizes and asymmetric packet sizes.

7. The method of claim 1, further comprising:

receiving, at the first node and from the second node, a response, wherein the response comprises a network-allocation-vector indicating a length of transmission, wherein the method further comprises timing transmission of the first data and the acknowledgment based on the network-allocation-vector.

8. The method of claim 1, further comprising:

after receiving, from the second node, a response indicating availability, only transmitting the first data and the acknowledgement to the second node upon determining that the second node is full-duplex enabled.

9. A system comprising:

a processor; and

a computer-readable storage device storing instructions which, when executed by the processor, cause the processor perform operations comprising;

transmitting, from a first node and to a second node, a first data on a frequency channel while receiving, at the first node, a second data from the second node on the frequency channel, to yield full duplex data communications between the first node and the second node; and

after transmitting the first data to the second node and waiting a dynamically updated short-interframe-space waiting period during which time no data is transmitted by the first node or the second node, transmitting, from the first node to the second node, an acknowledgement indicating reception of the second data while receiving data at the first node, the data being received from the second node.

10. The system of claim 9, wherein the transmitting of the acknowledgment and the transmitting of the first data occur in the frequency channel.

11. The system of claim 9, wherein the transmitting of the acknowledgement and the transmitting of the first data occur in distinct frequency channels.

12. The system of claim 9, wherein the computer-readable storage device stores additional instructions which, when executed by the processor, cause the processor to perform operations further comprising:

transmitting the first data and receiving the second data only after waiting, after receiving a response indicating availability, a short-interframe-space time.

13. The system of claim 9, wherein the second data was taken out-of-order from a queue associated with the second node.

14. The system of claim 9, wherein the first data and the second data have one of identical packet sizes and asymmetric packet sizes.

15. The system of claim 9, wherein the computer-readable storage device stores additional instructions which, when executed by the processor, cause the processor to perform operations further comprising:

receiving, at the first node and from the second node, a response, wherein the response comprises a network-allocation-vector indicating a length of transmission, wherein the operations further comprise timing transmission of the first data and the acknowledgment based on the network-allocation-vector.

16. The system of claim 9, further comprising:

after receiving, from the second node, a response indicating availability, only transmitting the first data and the acknowledgement to the second node upon determining that the second node is full-duplex enabled.

17. A computer-readable storage device having instructions stored which, when executed by a processor, cause the processor to perform operations comprising:

transmitting, from a first node and to a second node, a first data on a frequency channel while receiving, at the first node, a second data from the second node on the frequency channel, to yield full duplex data communications between the first node and the second node; and

after transmitting the first data to the second node and waiting a dynamically updated short-interframe-space waiting period during which time no data is transmitted by the first node or the second node, transmitting, from the first node to the second node, an acknowledgement indicating reception of the second data while receiving data at the first node, the data being received from the second node.

18. The computer-readable storage device of claim 17, wherein the transmitting of the acknowledgment and the transmitting of the first data occur in the frequency channel.

19. The computer-readable storage device of claim 17, wherein the transmitting of the acknowledgement and the transmitting of the first data occur in distinct frequency channels.

20. The computer-readable storage device of claim 17, wherein the computer-readable storage device stores additional instructions which, when executed by the processor, cause the processor to perform operations further comprising:

transmitting the first data and receiving the second data only after waiting, after receiving a response indicating availability, a short-interframe-space time.