US 11,309,998 B2Granted

Hybrid automatic repeat request for wireless local area network

AssigneeNXP USA, Inc.

InventorsYakun Sun, Liwen Chu, Hongyuan Zhang, Sudhir Srinivasa, Huiling Lou

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Abstract

A first communication device generates and transmits a first physical layer (PHY) data unit as part of a hybrid automatic repeat request (HARQ) session, the first PHY data unit having a first plurality of media access control (MAC) protocol data units (MPDUs) including a first MPDU. The first communication device determines that a second communication device did not acknowledge successfully receiving the first MPDU. The first communication device generates and transmits a second PHY data unit as part of the HARQ session, the second PHY data unit having a second plurality of MPDUs, the second plurality of MPDUs including the first MPDU.

Claims22

Dependent claims

A method for communicating in a wireless local area network (WLAN) that includes a first communication device and a second communication device, the method comprising:

generating, at the first communication device, a first physical layer (PHY) data unit as part of a hybrid automatic repeat request (HARQ) session, the first PHY data unit having a first plurality of data units including a first data unit, wherein generating the first PHY data unit includes:
for each data unit in the first plurality of data units,
modulating and packing data of the data unit into orthogonal frequency division multiplexing (OFDM) symbols such that each data unit of the first plurality of data units corresponds to a separate group of OFDM symbols in the first PHY data unit, each group of OFDM symbols in the first PHY data unit being formed with data from only a single respective data unit of the first plurality of data units wherein a constellation mapper is configured to map an interleaved sequence of bits in the single respective data unit to constellation points corresponding to different subcarriers of an OFDM symbol;
transmitting, by the first communication device, the first PHY data unit;
determining, at the first communication device, that the second communication device did not acknowledge successfully receiving a set of one or more data units among the first plurality of data units, the set of one or more data units including the first data unit;
generating, at the first communication device, a second PHY data unit as part of the HARQ session, the second PHY data unit having a second plurality of data units, including:
including at least the first data unit in the second plurality of data units in response to determining that the second communication device did not acknowledge successfully receiving the set of one or more data units, and for each data unit in the second plurality of data units,
modulating and packing data of the data unit into OFDM symbols such that each data unit of the second plurality of data units corresponds to a separate group of OFDM symbols in the second PHY data unit, each group of OFDM symbols in the second PHY data unit being formed with data from only a single respective data unit of the second plurality of data units;
and
transmitting, by the first communication device, the second PHY data unit.

7 more elements

An apparatus, comprising:

a wireless local area network (WLAN) interface device associated with a first communication device, the network interface device having one or more integrated circuits (ICs) configured to:
generate a first physical layer (PHY) data unit as part of a hybrid automatic repeat request (HARM) session, the first PHY data unit having a first plurality of data units including a first data unit, including:
for each data unit in the first plurality of data units,
modulate and pack data of the data unit into orthogonal frequency division multiplexing (OFDM) symbols such that each data unit of the first plurality of data units corresponds to a separate group of OFDM symbols in the first PHY data unit, each group of OFDM symbols in the first PHY data unit being formed with data from only a single respective data unit of the first plurality of data units wherein a constellation mapper is configured to map an interleaved sequence of bits in the single respective data unit to constellation points corresponding to different subcarriers of an OFDM symbol;
and the one or more ICs are further configured to:
control the WLAN interface device to transmit the first PHY data unit,
determine that a second communication device did not acknowledge successfully receiving a set of one or more data units among the first plurality of data units, the set of one or more data units including the first data unit, and
generate a second PHY data unit as part of the HARQ session, the second PHY data unit having a second plurality of data units, wherein generating the second PHY data unit comprises:
including at least the first data unit in the second plurality of data units in response to determining that the second communication device did not acknowledge successfully receiving the set of one or more data units, and for each data unit in the second plurality of data units,
modulate and pack data of the data unit into OFDM symbols such that each data unit of the second plurality of data units corresponds to a separate group of OFDM symbols in the second PHY data unit, each group of OFDM symbols in the second PHY data unit being formed with data from only a single respective data unit of the second plurality of data units;
and wherein the one or more ICs are further configured to control the WLAN interface device to transmit the second PHY data unit.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/004,039Filed 27 Aug 2020 · continuation
Priority: 3 Feb 2014
Published: US 2020/0396025 A117 Dec 2020
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04L 1/1812
Automatic repetition systems, e.g. Van Duuren systems: hybrid protocols; Hybrid automatic repeat request [HARQ]
H04L 1/1664
Details of the supervisory signal: the supervisory signal being transmitted together with payload signals; piggybacking
H04L 1/1685
Details of the supervisory signal: the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
H04L 1/1835
Arrangements specially adapted for the receiver end: buffer management

Family

Application61/935,215Us provisional application · filed 3 Feb 2014
Application14/600,766Parent of this continuation · filed 20 Jan 2015
Application15/876,360Parent of this continuation · filed 22 Jan 2018
US 9,876,614 B1Parent of this continuation · filed 23 Jan 2018
US 2020/0396025 A1Pre-grant publication · published 17 Dec 2020
US 10,790,937 B1Parent of this continuation
US 11,309,998 B2This patent

From the US filing history. Foreign family members aren’t listed.