Marvell Asia Pte., Ltd.

Nxp Usa, Inc.

Marvellworld Trade Ltd.

Marvell International Limited

Lsi Corporation

Avago Technologies General IP (singapore) Pte. Ltd.

Nxp B.v.

Rui Cao

Hongyuan Zhang

Liwen Chu

Hui-Ling Lou

Sudhir Srinivasa

Yan Zhang

Xiayu Zheng

Yakun Sun

Mingguang Xu

Jie Huang

Prashant Sharma

Young Hoon Kwon

Haitao Xia

Pantas Sutardja

Ke Han

Yu Kou

Lu Pan, Sr

Hua Mu

Lu Lu

Hari Ram Balakrishnan

Shaohua Yang

Yang Han

Dong Wei

Bo Yu

Huiling Lou

Fan Zhang

Lei Wang

Shu Li

Jinjing Jiang

Bruce Alexander Wilson

Timothy J Donovan

Mao Yu

Ken Kinwah Ho

Vijay Ahirwar

Jun Xiao

Randy Tsang

Vincent Pierre Martinez

Xuebin Wu

Sri Varsha Rottela

Sayak Roy

Haotian Zhang

Yi-Ling Chao

Sergey Timofeev

Jianzhong Huang

Sai-Wang Tam

Lingyan Sun

Alden C Wong

Cornelis Marinus Moerman

Rulin Huang

Alireza Razzaghi

Su Chenxin

Po Wei Tan

Ying Liu

Honyuan Zhang

A wireless network interface of a first client station negotiates with an access point a first component channel of an operating channel via which the first client station is to receive wakeup frames from the access point. A wakeup radio of the first client station receives a wakeup packet from the access point. The wakeup packet spans the operating channel, which comprises at least four component channels, and one or more of the component channels within the operating channel are punctured so that the access point does not transmit the wakeup packet in the one or more component channels that are punctured. The wakeup packet includes a first wakeup frame for the first client station in the first component channel and one or more respective second wakeup frames for one or more second client stations in one or more respective second component channels.

Frequency division multiple access (FDMA) support for wakeup radio (WUR) operation

In a vehicular communication network, a communication device generates a physical layer (PHY) preamble of a PHY protocol data unit (PPDU) for transmission in the vehicular communication network. The communication device generates a plurality of PHY data segments of the PPDU, and one or more PHY midambles, each PHY midamble to be transmitted between a respective pair of adjacent PHY data segments, and each PHY midamble including one or more training signal fields. Generating the one or more PHY midambles includes, when the PPDU is to be transmitted according to an extended range (ER) mode, generating each training signal field to include i) a first portion based on a very high throughput long training field (VHT-LTF) defined by the IEEE 802.11ac Standard and ii) a second portion based on the VHT-LTF defined by the IEEE 802.11ac Standard; and transmitting, by the communication device, the PPDU in the vehicular communication network.

Midamble format for packets in a vehicular communication network

A device, a system, and a method for power spectrum density (PSD) limited transmissions are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to generate a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) that includes a base modulation frequency unit, where the base modulation frequency unit is duplicated to unpunctured subchannels of the PPDU with a phase rotation, and transmit the PPDU in accordance with a power spectrum density (PSD) limit.

Device, system, and method for power spectrum density (PSD) limited transmissions

A communication device performs a first backoff operation with a first backoff counter to determine when to transmit a first packet in a first frequency, and performs a second backoff operation with a second backoff counter to determine when to transmit a second packet in a second frequency segment. In connection with the first backoff counter expiring, the communication device transmits the first packet in the first frequency segment. In connection with the second backoff counter expiring, the communication device transmits the second packet in the second frequency segment simultaneously with transmitting the first packet in the first frequency segment. In response to determining that transmission of the first packet in the first frequency segment failed, the communication device increases a first contention window for a retransmission of the first packet, and does not adjust the second contention window for a next transmission in the second frequency segment.

Padding and backoff operations when transmitting via multiple frequency segments in a WLAN

A communication device generates a first packet and a second packet. The first packet includes a first physical layer (PHY) preamble having: a first legacy signal field (L-SIG) having first duration information that indicates a first duration of the first packet; and first non-legacy signal field information having first modulation information that indicates a first modulation used in the first packet. The second packet includes a second PHY preamble having: a second L-SIG having second duration information that indicates a second duration of the second packet, wherein the second duration is different than the first duration; and second non-legacy signal field information having second modulation information that indicates a second modulation used in the second packet, wherein the second modulation is different than the first modulation. The communication device simultaneously transmits the first packet in a first frequency segment and the second packet in a second frequency segment.

Simultaneous transmission in multiple frequency segments

Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves encoding bits in a first preamble portion of a packet that are defined on a per-channel basis and that are repeated across multiple frequency blocks of a bandwidth, encoding bits in a second preamble portion of the packet that are defined on the per-channel basis and that are repeated within at least one frequency block of the bandwidth, encoding bits in a third preamble portion of the packet that are defined on a two-channel basis and that are repeated within at least one frequency block of the bandwidth, padding the third preamble portion of the packet to have a same length for each of the frequency blocks, and transmitting the packet.

Method and apparatus for communications

A first communication device receives a sounding packet from a second communication device and develops beamforming information based on the sounding packet. The first communication device transmits beamforming feedback to the second communication device, the beamforming feedback including beamforming information for use by the second communication device to beamsteer a data packet to the first communication device, the data packet having a data portion that includes a second number of OFDM tones greater than a first number of OFDM tones in the sounding packet. After transmitting the beamforming feedback, the first communication device receives the data packet from the second communication device, the data packet including one or more data OFDM symbols, each of the one or more data OFDM symbols having the second number of OFDM tones.

Explicit beamforming in a high efficiency wireless local area network

Wireless communications comprises generating a trigger frame which has a first set of bits which directly indicates a resource unit (RU) arranged as a distributed RU is solicited to be transmitted in an uplink direction in a first frequency block and a second set of bits which directly indicates for one or more second frequency subblocks a spreading bandwidth of tones of the distributed RU or whether a second frequency subblock is a punctured subchannel. An access point (AP) transmits the trigger frame in a downlink direction to a non-AP station. The non-AP station generates and transmits in the uplink direction a Physical Layer Protocol Data Unit (PPDU) to the AP station with data modulated on the tones of the distributed RU based on the first set of bits and the second set of bits of the trigger frame.

Trigger frame arranged to solicit transmission of distributed resource units, and methods for generating the trigger frame

Aspects of the present disclosure are directed to communicating signals to receivers utilizing different protocols. As may be implemented in accordance with one or more embodiments, a set of signals are generated to include data configured in accordance with a first protocol and data configured in accordance with a second protocol. The set of signals are communicated over the wireless channel, by using the data corresponding to the first protocol for communicating with receivers operating in accordance with the first protocol and using the data corresponding to the second protocol to communicate with receivers operating in accordance with the second protocol.

Apparatuses and methods involving communications utilizing different protocols in a common channel

A first communication device transmits an NDP to a second communication device simultaneously with transmission of one or more other NDPs by the one or more third communication devices. Then, the first communication device receives a data unit that includes respective beamforming feedback data units for respective ones of the second communication device and the one or more third communication devices. The beamforming feedback data units include an aggregate media access control protocol data unit (A-MPDU) that includes a plurality of fragments of beamforming training information for the first communication device. The beamforming training information in the A-MPDU is generated by the second communication device based on the set of one or more training signals included in the NDP transmitted by the first communication device.

Explicit multiuser beamforming training in a wireless local area network

A wireless communication system, apparatus, and methodology are described for enabling wireless communication station (STA) devices to generate a Physical Layer Protocol Data Unit (PPDU) that includes a resource unit (RU) having a size that is less than a spreading frequency block by using one or more predetermined pilot and/or data tone mapping plans to control how each pilot/data tone from the RU is distributed onto a disjoint set of pilot/data subcarriers forming a distributed RU included in the spreading frequency block, thereby accommodating transmission of wider bandwidth and multiple resource unit assignments in accordance with power spectrum density (PSD) limits provided for orthogonal frequency-division multiplexing (OFDM) modulated symbols supported by emerging 802.11 standards.

Pilot design for distributed resource units

A communication device selects a frequency bandwidth via which a physical layer (PHY) protocol data unit (PPDU) will be transmitted in a vehicular communication network, and generates, the PPDU i) according to a downclocking ratio of 1/2, and ii) based on an orthogonal frequency division multiplexing (OFDM) numerology defined by an IEEE 802.11ac Standard. In response to the selected frequency bandwidth being 10 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 20 MHz PPDUs. In response to the selected frequency bandwidth being 20 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 40 MHz PPDUs.

Methods and apparatus for generation of physical layer protocol data units for vehicular environments

A first access point (AP) receives a first physical layer (PHY) data unit for initiating a joint channel sounding procedure between a group of APs and one or more client stations. The first AP receives a second PHY data unit for initiating a joint transmission by the group of APs. The first AP uses training signals in the first PHY data unit and the second PHY data unit to calculate a relative timing offset. The first AP uses the relative timing offset to adjust a transmit time of a third PHY data transmitted as part of the joint transmission.

Synchronization of joint transmissions with multiple access points

Hybrid automatic repeat request (HARQ) parameters for transmission of respective HARQ data units are determined. Determining HARQ parameters includes determining initial HARQ parameters, including an initial number of orthogonal frequency division multiplexing (OFDM) symbols that will be occupied by the HARQ data unit and an initial pre-coding padding factor corresponding to a boundary within a last OFDM symbol. Based at least in part on the initial pre-coding padding factor, it is determined whether the HARQ data unit will be misaligned with both a beginning of a first OFDM symbol occupied by the HARQ data unit and an end of a last OFDM symbol occupied by the HARQ data unit. When it is determined that the HARQ data unit will be misaligned, the initial pre-coding padding factor is adjusted to account for a reduced data tone OFDM symbol segment to be occupied by the HARQ data unit.

Physical layer (PHY) data unit encoding for hybrid automatic repeat request (HARQ) transmission

A communication device determines that a communication channel to be used for a multi-user (MU) transmission spans a frequency bandwidth greater than 160 MHz. The communication device allocates one or more frequency resource units (RUs) for the MU transmission, including: in response to determining that the communication channel spans the frequency bandwidth greater than 160 MHz, selecting one or more frequency RUs from a second set of frequency RUs. The second set of frequency RUs omits at least some RUs of a smallest bandwidth that are included in a first set of RUs that is used for allocating frequency RUs for communication channels having bandwidths of at most 160 MHz. The communication device generates allocation information that indicates the allocation of the one or more frequency RUs for the MU transmission, and transmits the allocation information to one or more other communication devices in connection with the MU transmission.

Allocating resource units for multi-user transmissions in wide bandwidths

Growing community of inventors

Fremont, CA, United States of America

Rui Cao