公开(公告)号：US20210144698A1

公开(公告)日：2021-05-13

申请号：US17093255

申请日：2020-11-09

Applicant: NXP USA, Inc.

Inventor： Young Hoon Kwon ,  Rui Cao ,  Liwen Chu ,  Hongyuan Zhang ,  Huiling Lou

IPC: H04W72/04 ,  H04W28/02 ,  H04W52/02 ,  H04W76/15 ,  H04W76/14

Abstract: A method for multi-antenna processing in multi-link wireless communication systems includes transmitting by a first MLD, a first capability defining a first number of Spatial Streams (SS) supported by the first MLD for a single link exchange over one of a subset of links from a plurality of links between the first MLD and a second MLD. A second capability is transmitted by the first MLD defining a second number of SS supported by the first MLD for each link of a multi-link exchange. At least one Radio Frequency (RF) chain of the first MLD is configured to enable communication over the subset of links from the plurality of links.

公开(公告)号：US20210068184A1

公开(公告)日：2021-03-04

申请号：US17005888

申请日：2020-08-28

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Rui Cao ,  Hongyuan Zhang ,  Huiling Lou

IPC: H04W76/15 ,  H04W80/08 ,  H04W74/08 ,  H04W8/24

Abstract: Examples of wireless communication based on link use capabilities of multi-link devices is disclosed. A first multi-link device receives a first physical layer conformance procedure (PLCP) protocol data unit (PPDU) on a first link from a second multi-link device and transmits a second PPDU on the second link based on a link use capability of the second multi-link device and a backoff counter counting down to a predetermined value. A first multi-link device also transmits a PPDU on the first link and the second link at a same start time based on an link idle determination and the backoff counter counting down to a predetermined value.

公开(公告)号：US20200322197A1

公开(公告)日：2020-10-08

申请号：US16907848

申请日：2020-06-22

Applicant: NXP USA, INC.

Inventor： Yan Zhang ,  Hongyuan Zhang ,  Rui Cao

IPC: H04L27/26 ,  H04L5/00 ,  H04W24/08

Abstract: A communication device receives a physical layer (PHY) protocol data unit (PPDU). The PPDU includes i) a PHY preamble and ii) PHY data portion that includes one or more PHY midambles, and the PHY preamble includes i) an indication of a length of the PPDU, and ii) an indication of a periodicity of PHY midambles in the PHY data portion. The communication device calculates a number of PHY midambles in the PPDU using i) the indication of the length of the PPDU, and ii) the indication of the periodicity of PHY midambles. The communication device calculates a reception time for the PPDU using the calculated number of PHY midambles, and processes the PPDU using the calculated reception time.

公开(公告)号：US20250168707A1

公开(公告)日：2025-05-22

申请号：US18955185

申请日：2024-11-21

Applicant: NXP USA, Inc.

Inventor： Ankit Sethi ,  Sachin Mohan Pottigari ,  Rui Cao ,  Sayak Roy ,  Sudhir Srinivasa

IPC: H04W28/20

Abstract: Embodiments of a wireless device and method are disclosed. In an embodiment, a wireless device comprises a wireless transceiver arranged to receive and transmit signals, and a controller operably coupled to the wireless transceiver to process the signals, wherein the controller is configured to transmit the signals to different end devices using different sized bandwidths, wherein the signals transmitted to a first end device use a first bandwidth of a first size and the signals transmitted to a first end device use a second bandwidth of a second size.

公开(公告)号：US20250150846A1

公开(公告)日：2025-05-08

申请号：US18940223

申请日：2024-11-07

Applicant: NXP USA, Inc.

Inventor： Xiayu Zheng ,  Liwen Chu ,  Hongyuan Zhang ,  Rui Cao

IPC: H04W16/28 ,  H04W16/18 ,  H04W88/10

Abstract: Methods and apparatus are described for millimeter wave (mmWave) link beam failure recovery. A wireless multi-link device (MLD), such as a non-AP MLD, establishes mmWave link and a non-mmWave link with a second wireless MLD. Upon detecting a beam failure of the mmWave link, the wireless MLD transmits, via the non-mmWave link, an indication of the beam failure which may also include a request frame for a candidate beam training procedure to be initiated by the second wireless MLD. In response, the wireless MLD receives, via the mmWave link, candidate beam training packets from the second wireless MLD. The wireless MLD further transmits, via the non-mmWave link, beam training feedback information regarding the candidate beam training packets. In an example, a new Tx beam (e.g., a Tx beam with a highest received signal strength) is selected for maintaining the mmWave link.

公开(公告)号：US20250056603A1

公开(公告)日：2025-02-13

申请号：US18800050

申请日：2024-08-10

Applicant: NXP USA, Inc.

Inventor： Sayak Roy ,  Ankit Sethi ,  Rui Cao ,  Rong Zhang ,  Dong Wei ,  Sudhir Srinivasa

IPC: H04W74/0808 ,  H04W16/14 ,  H04W72/044 ,  H04W72/0453 ,  H04W72/541

Abstract: In an IEEE 802.11 wireless system, a sharing AP device (1A) shares a transmission opportunity with a shared AP device (2A) by transmitting a coordinated spatial reuse opportunity announcement control frame packet having defined signal fields which are used by the shared AP device (2A) to compute a transmit power limit for limiting interference at a first sharing STA device (1S) associated with the sharing AP device (1A) when transmitting one or more first downlink packets from the shared AP device (2A) to a first shared STA (2S) device associated with the shared AP device (2A).

公开(公告)号：US20240306194A1

公开(公告)日：2024-09-12

申请号：US18600545

申请日：2024-03-08

Applicant: NXP USA, Inc.

Inventor： Kiseon Ryu ,  Liwen Chu ,  Rui Cao ,  Huizhao Wang ,  Hongyuan Zhang

IPC: H04W74/08

CPC classification number: H04W74/08

Abstract: In an IEEE 802.11 wireless system, a wireless STA is configured to access a secondary channel by receiving an inter-BSS PPDU which identifies a transmission channel bandwidth for the inter-BSS PPDU and TXOP duration, and then accessing a secondary channel which excludes the transmission channel bandwidth identified by the inter-BSS PPDU and a primary 20 MHz channel for the wireless STA device from a basic service set (BSS) operating bandwidth associated with the wireless STA device before exchanging one or more frames on the secondary channel during the TXOP duration without using the primary 20 MHz channel for the wireless STA device, and then switching back to the primary 20 MHz channel before the TXOP duration ends.

公开(公告)号：US20240147363A1

公开(公告)日：2024-05-02

申请号：US18385327

申请日：2023-10-30

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Rui Cao ,  Kiseon Ryu ,  Hongyuan Zhang ,  Huizhao Wang

IPC: H04W52/02

CPC classification number: H04W52/0229 ,  H04W84/12

Abstract: A method of a low power listening mode includes announcing, by a first wireless device is operating in a low power listening mode. The first wireless device in the low power listening mode receives an initial frame having a single spatial stream and a low data rate from a second wireless device. The frame requests a frame exchange with the first wireless device. The low data rate is lower than a maximum data rate of the first wireless device. A reply to the initial frame is transmitted to the second wireless device in a single spatial stream with the low data rate. The reply acknowledges an association with the second wireless device. The first wireless device wakes from the low power listening mode to a full capacity mode, and performs a frame exchange with the second wireless device in the full capacity mode.

公开(公告)号：US20240107604A1

公开(公告)日：2024-03-28

申请号：US18372908

申请日：2023-09-26

Applicant: NXP USA, Inc.

Inventor： Kiseon Ryu ,  Liwen Chu ,  Rui Cao ,  Hongyuan Zhang ,  Huizhao Wang

IPC: H04W76/15

CPC classification number: H04W76/15

Abstract: Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a wireless transceiver configured to receive a first frame from a first wireless access point (AP) for multi-AP coordination that is not associated with the wireless device and a second frame from a second wireless AP for multi-AP coordination that is associated with the wireless device and a controller configured to set a network allocation vector (NAV) timer of the wireless device to a non-zero value in response to the first frame and the second frame. The wireless transceiver is further configured to transmit a physical protocol data unit (PPDU) to the second wireless AP even if the NAV timer of the wireless device is non-zero.

公开(公告)号：US20240097838A1

公开(公告)日：2024-03-21

申请号：US18370790

申请日：2023-09-20

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Kiseon Ryu ,  Hongyuan Zhang ,  Rui Cao

IPC: H04L5/00 ,  H04W74/08

CPC classification number: H04L5/0037 ,  H04W74/0816

Abstract: Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a method includes selecting backoff 20 MHz channels of an operating channel bandwidth (BW) of a Basic Service Set (BSS), and announcing to a second wireless device the operating channel BW of the BSS for use in communicating between the wireless device and the second wireless device, subchannels of the operating channel bandwidth, and backoff 20 MHz channels of each subchannel, wherein one subchannel is a primary subchannel and one subchannel is a non-primary subchannel. A data unit is transmitted to the second wireless device in a backoff 20 MHz channel of the non-primary subchannel.