Telefonaktiebolaget Lm Ericsson (publ)

Other

Das, Sajal Kumar

Lopez, Miguel

Schliwa-bertling, Paul

Sundberg, Mårten

Liberg, Olof

Miguel Lopez

Leif Wilhelmsson

Dennis Sundman

Mårten Sundberg

Henrik Sahlin

Dennis Hui

Olof Liberg

Stefan Eriksson Löwenmark

Bo Hagerman

Guido Roland Hiertz

Thomas Olsson

Benny Lennartson

Paul Schliwa-Bertling

Yi-Pin Eric Wang

Henrik Sjöland

Rocco Di Taranto

Athanasios Stavridis

Tomas Andersson

Charlie Pettersson

Sven Erik Mattisson

Sajal Kumar Das

Nafiseh Shariati

Imadur Rahman

Roland A Smith

Thomas Nilsson

Hugo Tullberg

Göran N Klang

Stefan G Eriksson

Krister Sundberg

Naveed Butt

Robert Baldemair

Jung-Fu Cheng

Daniel Chen Larsson

Yufei W Blankenship

John Walter Diachina

Sorour Falahati

Pradeepa Ramachandra

Kumar Balachandran

Joachim Sachs

Andreas Höglund

Torsten Dudda

Osman Nuri Can Yilmaz

Lars Sundström

Jonas Fröberg Olsson

Jose Luis Pradas

Niklas Andgart

Gustav Wikström

Mattias Andersson

Sándor Rácz

János Farkas

Ying Sun

Dinand Roeland

Henrik Enbuske

György Miklós

Stefano Ruffini

Patrik Salmela

Bernard Smeets

Nianshan Shi

José Araújo

Zhenhua Zou

Sara Sandberg

Anna Larmo

Yu Wang

Balázs Varga

Magnus Sandgren

Kittipong Kittichokechai

Geza Szabo

Harald Gustafsson

Kimmo Juhani Hiltunen

Joao Vieira

Per Persson

Eric Nordström

Roland Carlsson

Kenneth Sandberg

Thomas Unshelm

Alexey Shapin

Norbert Reider

András Kern

Abdulrahman Alabbasi

Joakim Persson

Luis Felipe Del Carpio Vega

Piergiuseppe Di Marco

Satyam Dwivedi

Zsolt Kenesi

Ola Angelsmark

Alexandros Palaios

Gabor Nemeth

Kun Wang

Jingcheng Zhang

Majid Gerami

Johan Lundsjö

Bikramjit Singh

Dhruvin Patel

Hubertus Andreas Munz

Pramod Jacob Mathecken

Mårten Wahlström

Johan Kristofer Olsson

Fredrik Svensson

Marten Sundberg

Techniques for enhancing performance in Industrial Internet-of-Things (IIoT) scenarios, including techniques for time-sensitive networking (TSN) and 5G wireless network integration. An example method, performed by a wireless device, comprises receiving system information (SI) from a radio base station (RBS) of a radio access network (RAN), the SI being indicative of support for TSN through the RBS, and establishing at least one TSN stream with an external data network, through the RBS. The example method further includes receiving a first timing signal from the wireless communications network, via the RBS, receiving a second timing signal from the external TSN data network to which the wireless device is connected, comparing the first timing signal to the second timing signal to determine an offset, and transmitting the offset to the wireless communications network.

Industrial automation with 5G and beyond

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.

Multi-user physical layer packet for sensing

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.

Measurement signal for channel estimation

A packet format is disclosed for transmission of data packets over a communication channel, wherein transmission of one of the data packets utilizes a frequency bandwidth, and wherein the frequency bandwidth is dynamically variable between data packets. The packet format defines a frequency bandwidth detection field, wherein the frequency bandwidth detection field of a data packet has a first field content or a second field content, and wherein corresponding parts of the first and second field contents are orthogonal to each other. The first field content is indicative of that transmission of the data packet utilizes a first frequency bandwidth and the second field content is indicative of that transmission of the data packet utilizes a frequency bandwidth which is larger than the first frequency bandwidth. Corresponding methods and apparatuses for transmission/reception of data packets are also disclosed.

Packet format for transmission of data packets

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.

Transmission and reception of a physical layer packet with midambles

An access point of a wireless communication system configures a carrier for communication with one or more wireless devices associated with the access point. Based on a backoff counter maintained by the access point, the access point contends for access to the carrier to transmit data. In response to another access point winning contention for access to the carrier, the access point cooperates at least with the access point winning the contention by sharing a transmission opportunity reserved on the carriers by the access point winning the contention and transmitting at least a part of the data in the shared transmission opportunity. During the shared transmission opportunity the access point pauses the backoff counter.

Backoff counter handling for TXOP sharing

A wireless communication node () and method therein for generating and transmitting a modulated radio frequency (RF) signal by means of backscattering are disclosed. The wireless communication node () comprises an antenna () configured to receive a illuminating RF signal, a switch () that has M states, a set of impedances () comprising Mimpedances (Z1, Z2 . . . ZM). The antenna () is coupled to the set of impedances () by the switch (). The wireless communication node () further comprises a modulating value generator () configured to generate modulating values based on data to be transmitted and a frequency offset and a switch controller () configured to switch the state of the switch () based on the generated modulating values such that the antenna () is connected to a selected impedance among the M impedances. The received illuminating RF signal at the antenna () is modulated by the generated modulating values and reflected by the antenna () to generate and transmit the modulated RF signal. The switching rate is an integer multiple of the data rate, the integer is greater than 1 and the center frequency of the modulated RF signal has the frequency offset with respect to the center frequency of the received illuminating RF signal.

Communication node and method for generating modulated signals by backscattering

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.

Measurement signals for sensing

An access point () of a wireless communication system configures a carrier for communication with one or more wireless devices () associated with the access point (). Further, the access point () contends for access to the carrier and, in response to winning contention for access to the carrier, reserves a transmission opportunity, TXOP, on the carrier. Further, the access point () cooperates with one or more other access points () of the wireless communication system by sharing the TXOP based on spatial multiplexing of wireless transmissions on the carrier.

Sharing of TXOP based on spatial multiplexing

Methods are disclosed for communication devices capable of simultaneous transmission and reception, wherein a first method is for reception of a packet comprising a header and a payload and a second method is for transmission of a packet comprising a header and a payload. The second method comprises transmitting at least a part of the header. The first method comprises receiving at least a part of the header, attempting to decode the part of the header, and (when the part of the header is successfully decoded) transmitting a header acknowledgement signal. The second method comprises monitoring receipt of a header acknowledgement signal, and (when absence of the header acknowledgement signal is detected) interrupting the transmission of the packet and scheduling the packet for retransmission. Corresponding apparatuses, transceivers, communication devices and computer program products are also disclosed.

Acknowledgement for simultaneous transmission and reception

In one aspect, a method for detecting changes in distance between a first wireless device and a second wireless device is provided. The method comprises determining a variation of a parameter over time, based on measurements of first timing signals transmitted between the first and second wireless devices. The variation of the parameter depends on a distance between the wireless devices, and comprises periodic step transitions as a result of relative clock drift between the wireless devices. The method further comprises predicting a time at which a periodic step transition is expected to occur based on the variation of the parameter, and determining a value of the parameter based on measurements of second timing signals. In response to a determination that the determined value of the parameter differs from an expected value of the parameter, it is determined that the distance between the wireless devices has changed.

Methods, apparatus and device-readable mediums for detecting changes in distance between wireless devices

Methods, apparatus and non-transitory machine-readable mediums are provided for wireless access in communications networks comprising radio access network nodes and wireless light communication network nodes. In one embodiment, a method is performed by a radio access network node for selecting a transmit or receive beam for communication with a wireless device in a communication network. The radio access network node comprises a plurality of antenna elements configurable to provide a plurality of transmit or receive beams. The communication network further comprises one or more wireless light communication, LC, network nodes. The method comprises: obtaining information identifying a wireless LC network node to which the wireless device is connected; based on the identified wireless LC network node, selecting a subset of the plurality of transmit or receive beams; and initiating a beam-sweeping procedure using the subset of transmit or receive beams to select a transmit or receive beam for communication with the wireless device.

Methods, apparatus and machine-readable mediums related to wireless access in communication networks

Transmitting a first data stream to a first station and simultaneously transmitting a second data stream to a second station. A method includes modulating a first signal by the first data stream to form a second signal, modulating the second signal by the second data stream to form a third signal, and transmitting the third signal by conversion to a transmission frequency to form a radio frequency signal, amplifying the radio frequency signal and providing the amplified radio frequency signal to an antenna. The modulation of the first signal is performed by scrambling of the first signal and the modulation of the second signal is performed by binary amplitude shift keying of the second signal, or the modulation of the first signal is performed by binary amplitude shift keying of the first signal and the modulation of the second signal is performed by scrambling of the second signal.

Avoiding spectral lines for wake up packet OOK signal

A method is performed by a wireless transmitting device for a communication network. The communication network implements a standard in which transmitting devices contend for access to a wireless transmission medium, a transmitting device being permitted to transmit using the wireless transmission medium for a window of time upon winning contention. The method includes: initiating a first, initial transmission to one or more wireless receiving devices in the window of time, the first transmission including a first preamble; and, subsequent to the first transmission, initiating a second transmission to one or more wireless receiving devices in the window of time, the second transmission including a second preamble which is shorter than the first preamble, or including no preamble.

Methods, apparatus and machine-readable media relating to wireless transmission in a communication network

An approach for transmission provides a method of enabling Hybrid Automatic Request, HARQ, in an IEEE 802.11 communication. The method includes transmitting, in an element in a Block Acknowledgement, BA, setup of a Medium Access Control, MAC, message, which element indicates a request to use HARQ, receiving a response to said request, and starting to apply HARQ. The approach includes a network entity of a wireless network using IEEE 802.11. The network entity includes a transmitter arranged to transmit, in an element in a Block Acknowledgement, BA, setup of a Medium Access Control, MAC, message, which element indicates a request to use HARQ, a receiver arranged to receive a response to said request, and a communication handler arranged to start to apply HARQ.

Method of enabling HARQ, network entity and computer program

Growing community of inventors

Solna, Sweden

Miguel Lopez