Telefonaktiebolaget Lm Ericsson (publ)

Magnus Sandgren

Magnus Nilsson

Stefano Ruffini

John Walter Diachina

Mårten Wahlström

Robert Baldemair

Angelo Centonza

Torsten John Carlsson

Muhammad Ali Kazmi

Torgny Palenius

Peter Jakobsson

Martin Isberg

Kun Wang

Jan Celander

Joachim Sachs

Dinand Roeland

Magnus Larsson

Michael Breschel

Paul Schliwa-Bertling

Pål Frenger

Henning Wiemann

György Miklós

Chunhui Zhang

Sara Sandberg

Satyam Dwivedi

Bikramjit Singh

Iana Siomina

Yufei W Blankenship

Fredrik Gunnarsson

Yi-Pin Eric Wang

Andres Reial

Leif Wilhelmsson

Sorour Falahati

Walter Müller

Siva Dharshan Muruganathan

Pradeepa Ramachandra

Miguel Lopez

Kumar Balachandran

Andreas Höglund

Torsten Dudda

Osman Nuri Can Yilmaz

Jonas Fröberg Olsson

Jose Luis Pradas

Niklas Andgart

Magnus Åström

Henrik Sjöland

Mattias Andersson

Imadur Rahman

Sándor Rácz

János Farkas

Ying Sun

Christopher Peter Callender

Christian Bergljung

Henrik Enbuske

Patrik Salmela

Nianshan Shi

Bernard Smeets

Ritesh Shreevastav

Alexander Hunt

José Araújo

Zhenhua Zou

Dennis Sundman

Anna Larmo

Balázs Varga

Kittipong Kittichokechai

Geza Szabo

Harald Gustafsson

János Harmatos

Florent Munier

Christer Östberg

Kimmo Juhani Hiltunen

Per Ernström

Per Persson

Garry Irvine

Alexey Shapin

Norbert Reider

András Kern

Joakim Persson

Abdulrahman Alabbasi

Gang Zou

Zsolt Kenesi

Ola Angelsmark

Alexandros Palaios

Gabor Nemeth

Majid Gerami

Johan Lundsjö

Dandan Hao

Dhruvin Patel

Erik Stare

Hubertus Andreas Munz

Pramod Jacob Mathecken

Deep Shrestha

Fredrik Dahlgren

Gábor Németh

Géza Szabó

Johan Kristofer Olsson

Fredrik Svensson

Mikael Johansson

A method is disclosed—for a wireless communication device served by a network access node—of keeping a time reference at the wireless communication device. The wireless communication device is configured for operation according to at least first and second operational modes, the second operational mode having lower power consumption than the first operational mode. The method comprises (during operation according to the first operational mode) determining (for the second operational mode) desired timings of timing signals to be transmitted from the network access node, and transmitting a request signal to the network access node, wherein the request signal carries information of the desired timings of timing signals to be transmitted from the network access node. In some embodiments, the method further comprises receiving a response signal from the network access node, wherein the response signal carries information of actual timings of timing signals to be transmitted from the network access node. Corresponding method for a network access node, apparatuses, wireless communication device, network access node and computer program product are also disclosed.

Keeping a time reference

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 for aligning sending of a network system clock time to a wireless device with initiating a propagation delay compensation procedure for the wireless device. An example method, in a network node, comprises determining that a propagation delay compensation procedure for the wireless device is to be initiated or has been initiated, and sending an indication of a network system clock time to the wireless device in association with the propagation delay compensation procedure.

Timing advance for TSN

Methods and apparatuses provide a mechanism to account for timing errors of a wireless device () in positioning measurements. In one example, a wireless device () performs reference-signal transmissions or measurements and sends information to a network node () that is involved in positioning of the wireless device (). The information indicates associations of the reference-signal transmissions or measurements with respective timing groups of the wireless device (). Each timing group represents a related set of transmission or reception timing errors within the wireless device (). Based on the information, the network node () accounts for the different timing-group associations when performing positioning calculations that are based on the reference-signal transmissions or measurements performed by the wireless device ().

Methods and apparatuses to account for timing errors of a user equipment in positioning measurements

According to some embodiments, a method performed by a wireless device capable of operating in a time sensitive network (TSN) comprises obtaining a time synchronization capability of the wireless device and transmitting an indication of the time synchronization capability to a network node. In particular embodiments, the time synchronization capability comprises one or more of a downlink receive tracking accuracy supported by the wireless device, a receive to transmit relative timing accuracy supported by the wireless device, an internal timing accuracy supported by the wireless device, and a propagation delay (PD) compensation method selection capability supported by the wireless device.

User equipment capabilities for time sensitive networking

An over the air, OTA, procedure derives a propagation delay (Formula I) of radio signals transmitted between a first radio network node (BS) and a second radio network node (BS) operative in a wireless communication system. Using this propagation delay, a two-step synchronization procedure accurately synchronizes, or time-aligns, antennas at the radio network nodes (BS, BS) for both transmission and reception. In a first step, each radio network node (BS, BS) is accurately calibrated, to obtain a total calibrated delay (Formula II) reflecting the sum of delays through a calibrated receiver path (Formula II) and a calibrated transmitter path (Formula III). In a second step, a pair of radio network nodes (BS, BS) separately align their antenna transmit and receive timings in a procedure in which a first radio network node (BS) is a master and a second radio network node (BS) is a slave.

Over the air antenna synchronization in wireless communication network

Methods and apparatus are provided. In an example aspect, a method () of estimating a location of a User Equipment (UE) is provided. The method comprises determining () whether a signal transmitted between the UE and a first network node has a line-of-sight (LoS) path between the UE and the first network node, and estimating () the location of the UE based on the signal received at the first network node and based on whether the signal has a LoS path.

Estimating a location of a user equipment

Embodiments include methods for a network node in a RAN to support timestamping of time-sensitive network (TSN) messages received by a UE. Such methods include sending one of the following information to the UE for use in timestamping of TSN messages: a second indication of one of multiple available downlink propagation delay (DL PD) compensation methods that is selected by the network node the UE; or a DL PD compensation value, determined by the network node based on one of the available DL PD compensation methods selected by the UE on a different one of the available DL PD compensation methods selected by the network node for the UE. Such methods also include sending, to the UE proximately after sending the information, an indication of a system clock time, associated with the RAN, to be compensated by the UE based on the information.

Selecting propagation delay compensation for time-sensitive network (TSN) information

A method, network node and core network node are provided. According to one aspect, a network node configured to communicate with a wireless device via an access network is provided. The network node includes processing circuitry configured to receive at least one parameter from a core network node where the at least one parameter indicates a level of synchronization accuracy that is required for a time sensitive network, TSN, clock in a TSN, and implement one of a plurality of methods in the access network for distributing access network clock information to the wireless device and for determining downlink propagation delay information based on the level of synchronization accuracy for the TSN clock where each method is associated with a different level of synchronization accuracy for the access network clock.

Supporting QoS flow specific uncertainty attribute

A distributed wireless system comprises controlling node and two or more antenna processing nodes communicatively coupled to the controlling node but spatially separated from each other and from the controlling node. The controlling node sends commands to and exchanges data with a first subset of the antenna processing nodes, using a first twisted-pair lane of a physical layer interface having four twisted-pair lanes, and sends commands to and exchanging data with a second subset of the antenna processing nodes, using a second twisted-pair lane. In some embodiments, the controlling node also uses a third twisted-pair lane for communicating with the first subset, while using the fourth twisted-pair lane for communicating with the second subset. Corresponding antenna processing nodes terminate one or two twisted-pair lanes in a direction towards the controlling node, while terminating one or two twisted-pair lanes towards one or more antenna processing nodes further from the controlling node.

Interface in series-connected radios

Systems and methods related to conveying Time Sensitive Networking (TSN) synchronization information within a cellular communication system (e.g., a Fifth Generation System (5GS)) are disclosed. In one embodiment, a method performed by a User Equipment (UE) in a cellular communications system or a TSN Translator (TT) associated with the UE comprises receiving, from a TSN end station, a Precision Time Protocol (PTP) or generalized PTP (gPTP) announce message comprising information that identifies one or more clock domains for which the TSN end station desires to receive PTP or gPTP messages. The method further comprises sending, to a core network node in the cellular communications system, either: (a) the information that identifies the one or more clock domains extracted from the PTP or gPTP announce message or (b) the PTP or gPTP announce message. Using this information, UE specific PTP or gPTP message filtering may be applied.

5G system signaling methods to convey TSN synchronization information

A first antenna processing node receives () one or more wireless transmissions from a wireless device and obtains first symbol values from the one or more wireless transmissions. The first antenna processing node receives () second symbol values from a second antenna processing node, the second symbol values corresponding to the one or more wireless transmissions as received at the second antenna processing node, and calculates () a first weight parameter based on at least a subset of the first symbol values and a corresponding subset of the second symbol values. The first antenna processing node calculates () third symbol values by computing a weighted sum of first symbol values and corresponding ones of the second symbol values, using the first weight parameter, and sends () the third symbol values to a third antenna processing node or to a controlling node. This combining of symbol values may approximate maximum ratio combining, MRC.

Coherent summing of signals from distributed radio access points

A wireless system comprises a controlling node and two or more antenna processing nodes coupled to the controlling node but separated from each other. The controlling node sends () a command to a first one of the two or more antenna processing nodes, instructing the first one of the two or more antenna processing nodes to transmit data to a wireless device. This may be preceded by selecting () the first one of the antenna processing nodes based on an estimated signal quality metric corresponding to the wireless device for each antenna processing node. In response to a determination by the controlling node that the wireless device has not successfully decoded the data, the controlling node sends () a command to a second one of the two or more antenna processing nodes, instructing the second one of the antenna processing nodes to transmit the data to the wireless device.

Hybrid automatic repeat request (ARQ) with spatial diversity

There is provided a method for determining and sharing a synchronization accuracy/error for a number of IAB nodes in a chain of IAB nodes communicatively coupled to each other. The method comprises: receiving from each IAB node in the chain of IAB nodes, information about a synchronization error for each IAB node; and reporting an accumulated synchronization error to the respective IAB nodes in the chain of IAB nodes, in response to receiving the information about the synchronization error for each IAB node.

Methods to monitor, configure, manage and signal synchronization for integrated access backhaul (IAB) links

According to one aspect of the disclosure, a wireless device is configured to communicate with a network node is provided. The wireless device includes processing circuitry configured to: receive an indication, adjust a transmit timing based at least on the indication, and optionally transmit signals based at least on the adjusted transmit timing.

Methods for autonomous timing adjustment under high speed scenario

Growing community of inventors

Staffanstorp, Sweden

Magnus Sandgren