# US 10,312,950 B2 · Systems and methods for multiuser interleaving and modulation

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- Number: US 10,312,950 B2
- Document ID: US10312950B2
- Status: Granted
- Kind: B2
- Application number: 15/516,597
- Filed: 2015-10-02
- Published: 2018-08-16
- Granted: 2019-06-04
- Earliest claimed: 2014-10-03
- Assignees: InterDigital Patent Holdings, Inc.
- Applicants: InterDigital Patent Holdings, Inc.
- Inventors: Fengjun Xi; Yuan Sheng Jin; Pengfei Xia; Oghenekome Oteri; Hanqing Lou; Nirav B. Shah; Robert L. Olesen
- Web page: https://patentgrep.com/patent/US10312950B2

## CPC

- H04B 1/02: Transmitters
- H03M 13/27: using interleaving techniques
- H03M 13/2707: {Simple row-column interleaver, i.e. pure block interleaving}
- H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)}
- H04L 1/0006: {by adapting the transmission format}
- H04L 1/0025: {Transmission of mode-switching indication}
- H04L 1/0026: {Transmission of channel quality indication}
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 1/1671: {the supervisory signal being transmitted together with control information}
- H04L 1/20: using signal quality detector
- H04L 5/00: Arrangements affording multiple use of the transmission path
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04B: TRANSMISSION
- H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Methods, systems, and apparatuses are disclosed for transmitting a plurality of bits to an access point (AP) and receiving constellation symbol from the AP. A constellation symbol may include a plurality of indications of bits. Each indication of the plurality of indications of bits may be associated with a respective wireless transmit/receive unit (WTRU) of a plurality of WTRUs. The plurality of indications of bits may include indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).

## Claims

### Claim 1

A method comprising:
transmitting, from a wireless transmit/receive unit (WTRU), a plurality of bits to an access point (AP);
receiving, at the WTRU, a constellation symbol from the AP,
wherein the constellation symbol comprises a plurality of indications of bits,
wherein each indication of the plurality of indications of bits is associated with a respective WTRU of a plurality of WTRUs,
wherein each indication of the plurality of indications of bits is associated with a weight,
wherein a first weight associated with a first indication of the plurality of indications of bits is different than a second weight associated with a second indication of the plurality of indications of bits, and
wherein the plurality of indications of bits comprises indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).

### Claim 2 (depends on 1)

The method of claim 1, wherein the plurality of indications of bits comprises indications of bits modulated at one of an open loop MU-CBDMAM or a closed loop MU-CBDMAM.

### Claim 3 (depends on 1)

The method of claim 1, wherein each indication of the plurality of indications of bits is associated with a weighting that differs from weightings associated with each other indication of the indications of bits.

### Claim 4 (depends on 1)

The method of claim 1, wherein the constellation symbol is associated with one of a uniform constellation or a non-uniform constellation.

### Claim 5 (depends on 1)

The method of claim 1, further comprising receiving a first MU-CBDMAM information element (IE) indicating a capability of the AP.

### Claim 6 (depends on 5)

The method of claim 5, wherein the first MU-CBDMAM IE is comprised in a beacon.

### Claim 7 (depends on 1)

The method of claim 1, further comprising transmitting an association request to the AP comprising a second MU-CBDMAM IE.

### Claim 8 (depends on 1)

The method of claim 1, further comprising receiving a first data frame associated with one of an open loop MU-CBDMAM or a closed loop MU-CBDMAM.

### Claim 9 (depends on 1)

The method of claim 1, further comprising transmitting a feedback control frame to the AP comprising that comprises at least one of an acknowledgement (ACK), an indicator of channel state information (CSI), and an indication of a signal-to-noise ratio (SNR).

### Claim 10 (depends on 1)

The method of claim 1, further comprising receiving an MU-CBDMAM transmission opportunity (TXOP) end frame.

### Claim 11

A wireless transmit/receive unit (WTRU) comprising:
a transceiver configured to transmit a plurality of bits to an access point (AP);
the transceiver further configured to receive a constellation symbol from the AP,
wherein the constellation symbol comprises a plurality of indications of bits,
wherein each indication of the plurality of indications of bits is associated with a respective WTRU of a plurality of WTRUs,
wherein each indication of the plurality of indications of bits is associated with a weight,
wherein a first weight associated with a first indication of the plurality of indications of bits is different than a second weight associated with a second indication of the plurality of indications of bits, and
wherein the plurality of indications of bits comprises indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).

### Claim 12 (depends on 11)

The WTRU of claim 11, wherein the plurality of indications of bits comprises indications of bits modulated at one of an open loop MU-CBDMAM or a closed loop MU-CBDMAM.

### Claim 13 (depends on 11)

The WTRU of claim 11, wherein each indication of the plurality of indications of bits is associated with a weighting that differs from weightings associated with each other indication of the indications of bits.

### Claim 14 (depends on 11)

The WTRU of claim 11, wherein the constellation symbol is associated with one of a uniform constellation or a non-uniform constellation.

### Claim 15 (depends on 11)

The WTRU of claim 11, wherein the transceiver is further configured to receive a first MU-CBDMAM information element (IE) indicating a capability of the AP.

### Claim 16 (depends on 15)

The WTRU of claim 15, wherein the first MU-CBDMAM IE is comprised in a beacon.

### Claim 17 (depends on 11)

The WTRU of claim 11, wherein the transceiver is further configured to transmit an association request to the AP comprising a second MU-CBDMAM IE.

### Claim 18 (depends on 11)

The WTRU of claim 11, wherein the transceiver is further configured to receive a first data frame associated with one of an open loop MU-CBDMAM or a closed loop MU-CBDMAM.

### Claim 19 (depends on 11)

The WTRU of claim 11, wherein the transceiver is further configured to transmit a feedback control frame to the AP comprising that comprises at least one of an acknowledgement (ACK), an indicator of channel state information (CSI), and an indication of a signal-to-noise ratio (SNR).

### Claim 20 (depends on 11)

The WTRU of claim 11, wherein the transceiver is further configured to receive an MU-CBDMAM transmission opportunity (TXOP) end frame.