FULL-DUPLEX CAPACITY ALLOCATION FOR OFDM-BASED COMMUNICATION

• US 20130250866A1
• Filed: 07/31/2012
• Published: 09/26/2013
• Est. Priority Date: 03/23/2012
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Hui, Jonathan W., Vasseur, Jean-Philippe, Hong, Wei
• Granted Patent: US 9,240,913 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 2203/5416 by adding signals to the wave form of the power source
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0033 each allocating device acting autonomously, i.e. without negotiation with other allocating devices
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In one embodiment, device determines a quantity of subcarriers available for data frame transmission and data frame receipt based on information included in an acknowledgement data frame. The device transmits a first data frame over at least one of the subcarriers and includes information associated with one or more additional data frames pending transmission. The device then receives a second data frame, subsequent to transmission of the first data frame, and determines a quantity of subcarriers available for transmission of the one or more additional data frames pending transmission based on the information included in the second data frame.

Claims

1. A method, comprising:

transmitting a first data frame, with a transmitter, along at least one of a plurality of subcarriers, the first data frame including information associated with one or more additional data frames pending transmission by the transmitter;

receiving a second data frame, with a receiver, subsequently to the first data frame, the second data frame including information associated with one or more data frames pending receipt by the receiver; and

determining, with a processor, a quantity of subcarriers available for transmission of the one or more additional data frames pending transmission based on information included in the second data frame.

2. The method of claim 1, wherein the information included in the first data frame includes one of a quantity, a priority, and a size of additional data frames pending transmission.

3. The method of claim 1, further comprising determining, with the processor, a quantity of subcarriers available for receipt of the one or more data frames pending receipt by the receiver based on the information included in the first data frame and the information included in the second data frame.

4. The method of claim 3, further comprising adjusting, with the processor, a quantity of subcarriers available for transmission and a quantity of subcarriers available for receipt based on the information included in the first data frame and the information included in the second data frame.

5. The method of claim 1, wherein the information included in the second data frame includes one of a quantity, a priority, and a size of the data frames pending receipt.

6. The method of claim 1, wherein the second data frame is received after transmission of the first data frame is completed.

7. The method of claim 1, wherein the second data frame is received during the transmission of the first data frame.

8. The method of claim 7, wherein the second data frame contains an indication that one or more additional data frames are critical and transmission of the first data frame is interrupted to allow receipt of the one or more additional data frames.

9. An apparatus, comprising:

a transmitter configured to transmit one or more data frames over a network using a plurality of subcarriers;

a receiver configured to receive one or more data frames over the network using the plurality of subcarriers;

a processor configured to communicate with the transmitter and the receiver;

a memory configured to communicate with the processor, the memory having instructions stored thereon that, in response to execution by the processor, cause the processor to perform operations comprising;

transmitting a first data frame over at least one of the subcarriers, the first data frame including information associated with one or more additional data frames pending transmission by the transmitter;

receiving a second data frame subsequent to transmission of the first data frame, the second data frame including information associated with one or more data frames pending receipt by the receiver; and

determining a quantity of subcarriers available for transmission of the one or more additional data frames pending transmission based on the information included in the second data frame.

10. The apparatus of claim 9, wherein the information included in the first data frame includes one of a quantity, a priority, and a size of data frames pending transmission.

11. The apparatus of claim 9, wherein the processor determines a quantity of subcarriers available for data frame transmission and data frame receipt based on the information included in the first data frame and the information included in the second data frame.

12. The apparatus of claim 9, wherein the processor adjusts the quantity of subcarriers available for data frame transmission and data frame receipt based on the information included in the first data frame and the information included in the second data frame.

13. The apparatus of claim 9, wherein the information included in the second data frame includes one of a quantity, a priority, and a size of data frames pending receipt.

14. The apparatus of claim 9, wherein the second data frame is received after transmission of the first data frame is completed.

15. The apparatus of claim 9, wherein the second data frame is received during the transmission of the first data frame.

16. The apparatus of claim 9, wherein the second data frame contains an indication that one or more additional data frames are critical and transmission of the first data frame is interrupted to allow receipt of the one or more additional data frames.

17. A tangible non-transitory computer-readable medium having computer executable instructions stored thereon that, when executed by a computer, cause the computer to perform a method comprising:

transmitting a first data frame over at least one of a plurality of subcarriers, the data frame including information associated with one or more additional data frames pending transmission;

receiving a second data frame, subsequent to transmission of the first data frame, the second data frame including information associated with one or more data frames pending receipt by the receiver; and

determining a quantity of subcarriers available for transmission of the one or more additional data frames pending transmission based on the information included in the second data frame.

18. The computer-readable medium of claim 17, further comprising determining a quantity of subcarriers available for receipt of the one or more data frames pending receipt based on the information included in the first data frame and the information included in the second data frame.

19. The computer-readable medium of claim 17, further comprising adjusting a quantity of subcarriers available for transmission and a quantity of subcarriers available for receipt based on the information included in the first data frame and the information included in the second data frame.

20. The computer-readable medium of claim 17, wherein the second data frame is received during the transmission of the first data frame, the second data frame contains an indication that one or more additional data frames are critical, and transmission of the first data frame is interrupted to allow receipt of the one or more additional data frames.