Systems, Methods, and Devices for Allocating OFDMA Subchannels Without Straddling Direct Current

Patent metadata

Field	Value
Publication number	US-2016105271-A1
Application number	US-201414582774-A
Country	US
Kind code	A1
Filing date	Dec 24, 2014
Priority date	Oct 8, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

Example systems, methods, and devices for reusing one or more architectural building blocks of IEEE 802.11 n/ac/ah network, and allocating one or more Orthogonal Frequency-Division Multiple Access (OFDMA) tones such that the one or more OFDMA allocations have fixed locations which do not straddle DC are disclosed.

First claim

What is claimed is:

1 . A device to allocate one or more communication subchannels in a multi-user operation, the device comprising:
one or more processors including circuitry, the circuitry having logic to:
reuse one or more architectural building blocks configured to allow operation of the device in a legacy wireless network; and
allocate one or more orthogonal frequency division multiple access (OFDMA) tones such that the one or more OFDMA tone allocations have fixed locations that do not straddle direct current.

2 . The device of claim 1 , wherein the logic is adapted to generate a waveform in said multi-user operation that operates with a four-times longer symbol duration than a legacy OFDMA waveform.

3 . The device of claim 1 , wherein the one or more OFDMA allocations are sized for a 1024-point Fast Fourier Transform (FFT) in a 80 MHz bandwidth network.

4 . The device of claim 1 , wherein the logic is to enable at least one of:
a 20 MHz operation in a primary channel of 40 MHz Basic Service Sets (BSS), a 20 MHz operation in a primary channel of 80 MHz BSS, a 40 MHz operation in a primary channel of 80 MHz BSS, a 20 MHz, a 40 MHz, and a 80 MHz operation BSS, or a 20 MHz, 40 MHz or 80 MHz operation in a primary channel of 160 MHz BSS.

5 . The device of claim 1 , wherein the one or more OFDMA tone allocations comprise one or more 26-tone allocations, one or more 242-tone allocations, one or more 496-tone allocations, or one or more 1008-tone allocations.

6 . The device of claim 1 , wherein the one or more OFDMA tone allocations comprise eight 30-tone allocations, four 60-tone allocations, two 120-tone allocations, and one 240-tone allocation.

7 . The device of claim 1 , wherein the one or more OFDMA tone allocations comprise sixteen 30-tone allocations, eight 60-tone allocations, four 120-tone allocations, two 240-tone allocations, and one 496-tone allocation.

8 . The device of claim 1 , wherein the one or more OFDMA tone allocations comprise thirty two 30-tone allocations, sixteen 60-tone allocations, eight 120-tone allocations, four 240-tone allocations, two 496-tone allocations, and one 1008-tone allocation.

9 . The device of claim 1 , further comprising:
a transceiver configured to transmit and receive wireless signals; and at least one memory that stores computer-executable instructions.

10 . The device of claim 9 , further comprising:
at least one antenna coupled to the transceiver; and the one or more processors are in communication with the transceiver.

11 . A method to allocate one or more communication subchannels in a multi-user operation, the method comprising:
reusing, by a first computing device comprising one or more processors and one or more transceiver components, one or more architectural building blocks configured to allow operation of the first computing device in a legacy wireless network; and allocating one or more orthogonal frequency division multiple access (OFDMA) tones such that the one or more OFDMA tone allocations have fixed locations that do not straddle direct current.

12 . The method of claim 11 , wherein a waveform generated in said multi-user operation operates with a four-times longer symbol duration than a legacy OFDMA waveform.

13 . The method of claim 11 , wherein the one or more OFDMA allocations are sized for a 1024-point Fast Fourier Transform (FFT) in a 80 MHz bandwidth network.

14 . The method of claim 11 , further comprising enabling at least one of: a 20 MHz operation in a primary channel of 40 MHz Basic Service Sets (BSS), a 20 MHz operation in a primary channel of 80 MHz BSS, a 40 MHz operation in a primary channel of 80 MHz BSS, a 20 MHz, a 40 MHz, and a 80 MHz operation BSS, or a 20 MHz, 40 MHz or 80 MHz operation in a primary channel of 160 MHz BSS.

15 . The method of claim 11 , wherein the one or more OFDMA tone allocations comprise one or more 26-tone allocations, one or more 242-tone allocations, one or more 496-tone allocations, or one or more 1008-tone allocations.

16 . The method of claim 11 , wherein the one or more OFDMA tone allocations comprise eight 30-tone allocations, four 60-tone allocations, two 120-tone allocations, and one 240-tone allocation.

17 . The method of claim 11 , wherein the one or more OFDMA tone allocations comprise sixteen 30-tone allocations, eight 60-tone allocations, four 120-tone allocations, two 240-tone allocations, and one 496-tone allocation.

18 . The method of claim 11 , wherein the one or more OFDMA tone allocations comprise thirty two 30-tone allocations, sixteen 60-tone allocations, eight 120-tone allocations, four 240-tone allocations, two 496-tone allocations, and one 1008-tone allocation.

19 . A non-transitory computer-readable medium storing computer-executable instructions which, when executed by a processor, cause the processor to perform operations comprising:
reusing one or more architectural building blocks configured to allow operation of the processor in a legacy wireless network; and allocating one or more orthogonal frequency division multiple access (OFDMA) tones such that the one or more OFDMA tone allocations have fixed locations that do not straddle direct current.

20 . The medium of claim 19 , further comprising: generating a waveform in said multi-user operation with a four-times longer symbol duration than an existing IEEE 802.11 OFDMA waveform.

21 . The medium of claim 19 , wherein the one or more OFDMA allocations are sized for a 1024-point Fast Fourier Transform (FFT) in a 20 MHz, 40 MHz, or 80 MHz bandwidth network.

22 . The medium of claim 19 , further comprising enabling at least one of: a 20 MHz operation in a primary channel of 40 MHz Basic Service Sets (BSS), a 20 MHz operation in a primary channel of 80 MHz BSS, a 40 MHz operation in a primary channel of 80 MHz BSS, a 20 MHz, a 40 MHz, and a 80 MHz operation BSS, or a 20 MHz, 40 MHz or 80 MHz operation in a primary channel of 160 MHz BSS.

23 . The medium of claim 19 , wherein the one or more OFDMA tone allocations comprise one or more 26-tone allocations, one or more 242-tone allocations, one or more 496-tone allocations, or one or more 1008-tone allocations.

24 . The medium of claim 19 , wherein the one or more OFDMA tone allocations comprise eight 30-tone allocations, four 60-tone allocations, two 120-tone allocations, and one 240-tone allocation.

25 . The medium of claim 19 , wherein the one or more OFDMA tone allocations comprise sixteen 30-tone allocations, eight 60-tone allocations, four 120-tone allocations, two 240-tone allocations, and one 496-tone allocation.

26 . The medium of claim 19 , wherein the one or more OFDMA tone allocations comprise thirty two 30-tone allocations, sixteen 60-tone allocations, eight 120-tone allocations, four 240-tone allocations, two 496-tone allocations, and one 1008-tone allocation.

Assignees

• Shahrnaz Azizi
• Stacey Robert
• Kenney Thomas J
• Perahia Eldad

Inventors

• Shahrnaz Azizi
• Stacey Robert
• Kenney Thomas J
• Perahia Eldad

Classifications

• H04L5/0058 Primary

  Allocation criteria · CPC title

• H04L5/0037

  Inter-user or inter-terminal allocation · CPC title

• H04L5/0007 Primary

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title