Telefonaktiebolaget Lm Ericsson (Publ)

Other

Dennis Sundman

Miguel Lopez

Leif Wilhelmsson

Robert Baldemair

Yi-Pin Eric Wang

Pradeepa Ramachandra

Kumar Balachandran

Joachim Sachs

Bo Hagerman

Osman Nuri Can Yilmaz

Jonas Fröberg Olsson

Jose Luis Pradas

Kimmo Juhani Hiltunen

Stefan Parkvall

Bengt Lindoff

Gunnar Mildh

Icaro L J Da Silva

Johan Rune

Fredrik Gunnarsson

Jinhua Liu

Pål Frenger

Erik Bengt Dahlman

Andres Reial

Jari Tapio Vikberg

Erik A Eriksson

Henrik Sahlin

Stefan Wager

Dennis Hui

Martin Hessler

Magnus Stattin

Sven Oscar Petersson

Walter Müller

Joakim Axmon

Karl Norrman

Qianxi Lu

Qingyu Miao

Johan Torsner

Fredrik Athley

Gabor Fodor

Janne Peisa

Ali S Khayrallah

Gen Li

Claes Tidestav

Zhang Zhang

Thorsten Lohmar

Lars Sundström

Lars Lindbom

Niclas Wiberg

Torgny Palenius

Johan Furuskog

Niklas Johansson

Jianfeng Wang

Hai Feng Wang

Andreas Bergström

Zhan Zhang

Peter Alriksson

Pontus Wallentin

Patrik Rugeland

Mårten Ericson

Henrik Asplund

Karl Werner

Martin Johansson

Johan Axnäs

Mikael Coldrey

Patrik Torgny Karlsson

Shehzad Ali Ashraf

Jonas Kronander

Fredrik Lindqvist

Reza Moosavi

Yngve Selén

Ning He

Mikael Prytz

Håkan Axelsson

Nadia Brahmi

Andreas Cedergren

Ali El Essaili

Niklas Jaldén

Jörg Huschke

Jonas Medbo

Elena Myhre

Hugo Tullberg

Emma Wittenmark

Lars Manholm

Virgile Garcia

Ulf Gustavsson

Thomas Walldeen

Junaid Ansari

Peter Von Wrycza

Ke Wang Helmersson

Eleftherios Karipidis

Bengt-Erik Olsson

Simon Järmyr

Du Ho Kang

Thomas Rimhagen

Cong Shi

Tim Irnich

Eliane Semaan

Jan-Erik Berg

Fredrik Harrysson

Göran N Klang

A wireless device () configures a carrier for communication with a serving access point (). The wireless device () maintains a virtual carrier sense timer. The virtual carrier sense timer indicates that the carrier is to be regarded as occupied as long as the virtual carrier sense timer is not expired. The wireless device () receives one or more wireless transmissions on the carrier. The one or more wireless transmissions each include: an identifier commonly assigned to multiple access points which cooperate by sharing a transmission opportunity, and a duration field for indicating a duration for which the carrier is expected to be occupied. In response to the identifier matching an identifier of the serving access point (), the wireless device () updates the virtual carrier sense timer according to the indicated duration. Based on the virtual carrier sense timer, the wireless device () controls one or more UL wireless transmissions from the wireless device ().

Control of uplink wireless transmissions in shared TXOP

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

Methods and apparatus in a fifth-generation wireless communications, including an example method, in a wireless device, that includes receiving a downlink signal comprising an uplink access configuration index, using the uplink access configuration index to identify an uplink access configuration from among a predetermined plurality of uplink access configurations, and transmitting to the wireless communications network according to the identified uplink access configuration. The example method further includes, in the same wireless device, receiving, in a first subframe, a first Orthogonal Frequency-Division Multiplexing (OFDM) transmission formatted according to a first numerology and receiving, in a second subframe, a second OFDM transmission formatted according to a second numerology, the second numerology differing from the first numerology. Variants of this method, corresponding apparatuses, and corresponding network-side methods and apparatuses are also disclosed.

Network architecture, methods, and devices for a wireless communications network

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

In one example aspect, a method of transmitting signals is provided, the method comprising transmitting signals using one or more first subcarriers only from a first antenna, wherein the signals transmitted from the first antenna comprise first signals based on data, and transmitting signals using one or more second subcarriers different from the one or more first subcarriers only from a second antenna, wherein the signals transmitted from the second antenna comprise second signals based on the data.

Transmitting and receiving signals using multiple carriers from multiple antenna

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

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 and apparatus in a fifth-generation wireless communications network, including an example method, in a wireless device, that includes determining a reporting quality threshold for a parameter related to channel state information (CSI); performing a measurement for each of a plurality of beams from a first predetermined set of beams for evaluation; evaluating the measurement for each of the plurality of beams against the reporting quality threshold; discontinuing the performing and evaluating of measurements in response to determining that the reporting quality threshold is met for one of the beams, such that one or more beams in the first predetermined set of beams are not measured and evaluated; and reporting, to the wireless communications network, CSI for the one of the beams.

Methods, apparatus, and device-readable mediums are disclosed relating to wireless access in a network requiring a carrier-sense mechanism. One aspect provides a method performed by a transmitting device for transmitting to a receiving device in a wireless communications network. The transmitting device comprises a plurality of antenna elements. The method comprises: performing a directional carrier-sense assessment for one or more sub-bands configured for transmissions between the transmitting device and the receiving device, the directional carrier-sense assessment utilizing beamforming to detect a respective level of wireless activity on each of the sub-bands in a particular direction for transmissions to the receiving device; selecting a respective transmit power for each sub-band based on the determined level of wireless activity; and transmitting to the receiving device in the particular direction, using the respective selected transmit power for each sub-band.

Methods, apparatus and device-readable mediums relating to wireless access in a network requiring a carrier-sense mechanism

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

A method of a first access point and an access point arranged to provide wireless communication access for a wireless communication system are disclosed. The method comprises determining that a first station is to transmit uplink data in an uplink transmission at a first frequency band in the unlicensed spectrum, assigning a second access point for receiving the uplink transmission, wherein the second access point is covering at least an overlapping area with a coverage area of the first access point, determining a second station targeted for downlink transmission, wherein the downlink transmission is scheduled for at least partly simultaneous transmission with the uplink transmission from the first station and at least partly overlapping the first frequency band, wherein a selection of the second station targeted for downlink transmission is based on a spatial relationship between the first and second stations, assigning antenna weights for an array antenna of the first access point to provide beamforming transmission of the downlink transmission towards the second station and a null towards the second access point, and transmitting the downlink transmission using the antenna weights. The access point is arranged to perform the method.

Simultaneous uplink and downlink transmission using multiple access points

A method for a primary wireless transmitter is disclosed. The primary wireless transmitter is configured to participate in transmission to a wireless receiver using spatial multiplexing in coordination with one or more secondary wireless transmitters. The method comprises assigning—from a collection of available channel sounding resources—respective channel sounding resources to the primary wireless transmitter and to the one or more secondary wireless transmitters, wherein each available channel sounding resource is assigned to at most one of the wireless transmitters. Each assigned respective channel sounding resource is for transmission of a respective non-spatial-multiplexed first channel sounding signal, and the first channel sounding signals are for phase tracking of signals transmitted by the primary wireless transmitter and/or for phase tracking of signals transmitted by the one or more secondary wireless transmitters. The method also comprises transmitting, to the one or more secondary wireless transmitters, information indicative of the respective channel sounding resources assigned to the one or more secondary wireless transmitters. Methods for the secondary wireless transmitters and the wireless receiver are also disclosed, as well as corresponding apparatuses, transmitter, receiver, access point, user station, control node, and computer program product.

Channel sounding for distributed transmission

Growing community of inventors

Solna, Sweden

Dennis Sundman