11 results about "Physical layer packet" patented technology

A method is disclosed of a transmitter configured to transmit a physical layer packet comprising a plurality of measurement signals for channel estimation. The method includes configuring the transmitter to use different precoding settings for at least two of the plurality of measurement signals for channel estimation, and transmitting the physical layer packet. In some embodiments, at least one of the plurality of measurement signals for channel estimation occurs outside of a preamble of the physical layer packet (e.g., in a midamble). A method of a corresponding receiver is also disclosed. Corresponding apparatuses, wireless communication device, and computer program product are also disclosed.

A method is disclosed of a transmitter configured to transmit more than one spatially multiplexed streams having a multi-user physical layer packet for a plurality of users. The plurality of users includes a first type user and a second type user. A first stream is assigned for the first type user and a second stream is assigned for the second type user. The method includes leaving a data field of the physical layer packet empty for the first type user, providing second type user emission strength (in a spatial direction towards the first type user) that falls below a threshold value by controlling a spatial emission pattern associated with the second type user for the physical layer packet, and transmitting the physical layer packet.

The invention relates to a wireless communication apparatus and a control physical layer packet reception method. A wireless communication device includes a media access control circuit, a radio frequency circuit, and a baseband circuit. The media access control circuitry is configured to simultaneously join or create a network operating in a first channel and a second channel, respectively. The radio frequency circuit is configured to switch to the first channel according to the control of the media access control circuit. The baseband circuit is configured to stay on a first channel for a first symbol period for preamble detection. If the baseband circuit detects a physical layer grouping preamble during a first symbol period, the baseband circuit stays in a second symbol period in a first channel so as to continue to receive the preamble, calculates correlation between data received during the first symbol period and the second symbol period respectively, and transmits the correlation between the data received during the first symbol period and the second symbol period to the baseband circuit; and determining whether to continue to stay in the first channel to continue to receive the physical layer packet according to the received physical layer packet.

A method of a transmitter is disclosed, which is configured to transmit a physical layer packet in accordance with a listen-before-talk process. The method includes: obtaining an indication of a specific time for channel estimation, providing at least one measurement signal for channel estimation based on the specific time for the physical layer packet, and transmitting the physical layer packet. In some embodiments, the physical layer packet is provided with a plurality of intermediate codes, wherein each intermediate code includes one or more measurement signals for channel estimation. In some embodiments, the physical layer packet is provided with a floating intermediate code including one or more measurement signals for channel estimation. A method of a receiver is also disclosed, the receiver being configured to receive a physical layer packet transmitted in accordance with a listen-before-talk process. The method includes: obtaining an indication of a specific time for channel estimation, receiving the physical layer packet, the physical layer packet being provided with at least one measurement signal for channel estimation based on the specific time, and performing channel estimation for the specific time based on the at least one measurement signal. Corresponding apparatuses, devices, and computer program products are also disclosed.

The present disclosure provides an apparatus and method for detecting and responding to radio frequency jamming attacks in an Open RAN environment. An O-DU generates physical layer data including SNR, CQI, BLER, or MCS and transmits the data to a Near-RT RIC through an E2 interface. The Near-RT RIC stores the physical layer data in an SDL. An RF jamming detection xApp receives the physical layer data from the SDL to detect radio frequency jamming attacks. The xApp transmits the detected attack information to a network slice management rApp of a Non-RT RIC through an O1 interface to enable dynamic response through network slicing.

A wireless communication device includes an MAC circuit, an RF circuit, and a baseband circuit. The MAC circuit is configured to simultaneously join or create networks that work on a first channel and a second channel, respectively. The RF circuit is configured to switch to the first channel according to a control of the MAC circuit. The baseband circuit is configured to stay on the first channel for a first symbol period to perform a preamble detection. If a preamble of a PHY layer packet is detected during the first symbol period, the baseband circuit further stays on the first channel for a second symbol period to continue receiving the preamble, and calculates the correlation between the data received respectively during the first symbol period and the second symbol period, and determines whether to stay on the first channel to continue receiving the PHY layer packet accordingly.

A method is disclosed of a transmitter configured to transmit a physical layer packet in accordance with a listen-before-talk procedure. The method includes acquiring an indication of a specific time for channel estimation, providing the physical layer packet with at least one measurement signal for channel estimation based on the specific time, and transmitting the physical layer packet. In some embodiments, the physical layer packet is provided with a plurality of midambles, wherein each midamble includes one or more measurement signals for channel estimation. In some embodiments, the physical layer packet is provided with a floating midamble which comprises one or more measurement signals for channel estimation. A method is also disclosed of a receiver configured to receive a physical layer packet transmitted in accordance with a listen-before-talk procedure.

This application discloses a capability indication method and a capability determining method in a wireless local area network, and an apparatus. The capability indication method includes: A first device determines capability information, and sends the capability information to a second device. The capability information includes a nominal packet padding subfield, and the nominal packet padding subfield indicates a corresponding nominal packet padding value used when the second device sends a physical layer data packet to the first device. The nominal packet padding value is for all NSSs and all RU allocations that the first device supports, and for at least two modulation schemes used by the second device on a configured frequency domain resource or a configured spatial stream.

A method is disclosed of a transmitter configured to transmit a physical layer packet having a plurality of midambles. The method comprises applying a respective phase shift for each midamble of the physical layer packet, and transmitting the physical layer packet. The respective phase shift is applied to at least a portion of symbols of the midamble.A method is also disclosed of a receiver configured to receive a physical layer packet having a plurality of midambles. The method comprises receiving the physical layer packet, and counteracting a respective phase shift for each midamble of the physical layer packet. Counteracting the respective phase shift comprises applying an opposite of the respective phase shift to at least a portion of symbols of the midamble or compensating the respective phase shift for at least a portion of symbols of the midamble.

A method for managing packet header fields in a physical (PHY) layer includes: receiving, by a header descriptor array (HDA) of a PHY layer, a data packet and a status signal of the data packet; writing, by the HDA, a header field for the received data packet; storing, by the HDA, the written header field and the status signal of the data packet in a header field array; and fetching, by the HDA, the header field of the data packet by enabling parallel reading of a plurality of locations of the header field array, enabling transmission and re-transmission of the data packet.

The invention provides a nominal packet filling value indication method, a nominal packet filling value determination method and a communication device, which are used for reducing the overhead of a physical layer packet extension threshold field. The indication method comprises: a first device generating a PPDU and sending the PPDU to a second device, a physical layer packet extension threshold information field included in the PPDU comprising a plurality of packet extension threshold sub-field sets corresponding to different nominal packet filling values, each packet extension threshold sub-field set being used for indicating a modulation threshold corresponding to an RU with an NSS of n and a serial number of b, when the value of the RU index mask field of the RU with the serial number of y is 0, the value range of b does not include y; in the packet extension threshold sub-field set corresponding to the same nominal packet filling value, the value of the RU index mask field of the RU with the serial number being y is 0 and is used for indicating that NSS is n, the modulation threshold of the RU with the serial number being y is the modulation threshold corresponding to the RU with the serial number being m1, and NSTS is n.