US 10,790,937 B1Granted

Hybrid automatic repeat request for wireless local area network

AssigneeNXP USA, Inc.

InventorsYakun Sun, Liwen Chu, Hongyuan Zhang, Sudhir Srinivasa, Hui-Ling 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 media access control (MAC) protocol data units (MPDUs) including a first MPDU, wherein generating the first PHY data unit includes:
for each MPDU in the first plurality of MPDU,
modulating and packing data of the MPDU into orthogonal frequency division multiplexing (OFDM) symbols such that each MPDU of the first plurality of MPDUs 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 MPDU of the first plurality of MPDUs wherein a constellation mapper is configured to map an interleaved sequence of bits in the single respective MPDU 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 MPDUs among the first plurality of MPDUs, the set of one or more MPDUs including the first MPDU;
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 MPDUs, including:
including at least the first MPDU in the second plurality of MPDUs in response to determining that the second communication device did not acknowledge successfully receiving the set of one or more MPDUs, and for each MPDU in the second plurality of MPDUs,
modulating and packing data of the MPDU into OFDM symbols such that each MPDU of the second plurality of MPDUs 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 MPDU of the second plurality of MPDUs;
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 (HARQ) session, the first PHY data unit having a first plurality of media access control (MAC) protocol data units (MPDUs) including a first MPDU, including:
for each MPDU in the first plurality of MPDU,
modulate and pack data of the MPDU into orthogonal frequency division multiplexing (OFDM) symbols such that each MPDU of the first plurality of MPDUs 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 MPDU of the first plurality of MPDUs wherein a constellation mapper is configured to map an interleaved sequence of bits in the single respective MPDU 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 MPDUs among the first plurality of MPDUs, the set of one or more MPDUs including the first MPDU, and
generate a second PHY data unit as part of the HARQ session, the second PHY data unit having a second plurality of MPDUs, wherein generating the second PHY data unit comprises:
including at least the first MPDU in the second plurality of MPDUs in response to determining that the second communication device did not acknowledge successfully receiving the set of one or more MPDUs, and for each MPDU in the second plurality of MPDUs,
modulate and pack data of the MPDU into OFDM symbols such that each MPDU of the second plurality of MPDUs 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 MPDU of the second plurality of MPDUs;
and wherein the one or more ICs are further configured to
control the WLAN interface device to transmit the second PHY data unit.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/876,360Filed 22 Jan 2018 · continuation
Priority: 20 Jan 2014
Granted: 29 Sep 2020
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

Application61/929,400Us provisional application · filed 20 Jan 2014
Application61/935,215Us provisional application · filed 3 Feb 2014
Application14/600,766Parent of this continuation · filed 20 Jan 2015
US 9,876,614 B1Parent of this continuation
US 10,790,937 B1This patent

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