Telefonaktiebolaget Lm Ericsson (publ)

Mårten Wahlström

Stefano Ruffini

Magnus Sandgren

Robert Baldemair

John Walter Diachina

Paul Schliwa-Bertling

Yufei W Blankenship

Dinand Roeland

Joachim Sachs

Yi-Pin Eric Wang

Sorour Falahati

Angelo Centonza

Pradeepa Ramachandra

Miguel Lopez

Kumar Balachandran

Torsten Dudda

Osman Nuri Can Yilmaz

Jonas Fröberg Olsson

Jose Luis Pradas

Niklas Andgart

Mattias Andersson

Sándor Rácz

János Farkas

Ying Sun

Henrik Enbuske

Patrik Salmela

György Miklós

Nianshan Shi

Bernard Smeets

José Araújo

Zhenhua Zou

Anna Larmo

Sara Sandberg

Balázs Varga

Kittipong Kittichokechai

Geza Szabo

Harald Gustafsson

Alexey Shapin

Per Persson

Anders Höglund

Kun Wang

Garry Irvine

Norbert Reider

András Kern

Abdulrahman Alabbasi

Joakim Persson

Alexandros Palaios

Ola Angelsmark

Zsolt Kenesi

Gabor Nemeth

Majid Gerami

Johan Lundsjö

Bikramjit Singh

Dhruvin Patel

Hubertus Andreas Munz

Gábor Németh

Géza Szabó

Ohan Khodaverdian

Fredrik Svensson

Mikael Johansson

Johannes Nygren

Muhammad Ikram Ashraf

Torgny Holmberg

Per Skarin

Alexandra Mikaelsson

Malgorzata Svensson

Fedor Chernogorov

Rodrigo Berg

Wolfgang Tonutti

Johan Olsson

Jonas Olsson Fröberg

Norberg Reider

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 performed by a transmitting device, for handling communication in a wireless communications network. The transmitting device transmits a Precision Time Protocol, PTP, message carrying synchronization information to a receiving device over a radio interface.

Transmitting device, receiving device and methods performed therein for handling communication

A group of radio network nodes () performs automatic synchronization source selection using Radio-interface Based Synchronization, based on the exchange of clock-attribute information between respective nodes () via inter-node connections. Access to the clock-attribute information for other nodes () in the same domain or subdomain allows a given node () to select the best or most preferred synchronization source for use in synchronizing its own clock (), based on a combined or joint evaluation of parameters or metrics that include the reception quality of OTA signals from respective ones of the candidate nodes () and the corresponding clock-attribute information. Further parameters or metrics may be evaluated in the selection, such as neighbor-relation considerations. The combined use of OTA synchronization signaling and clock-attribute information exchanges, e.g., according to IEEE 1588 PTP, enables the group of nodes () to carry out Best Master Clock Selection (BMCS) or Alternate BMCS algorithms on an automatic basis.

Method and apparatus for synchronizing radio network nodes

Systems and methods to enable 5G system support for conveying time synchronization are provided. In some embodiments, a method performed by a wireless device for conveying external time domain information is provided. The method includes receiving a message in a first time domain used by the wireless device, the message comprising external time domain information; determining information about a second time domain based on the external time domain information; and conveying information about the second time domain to another node. In some embodiments, timing information is included into a GPRS Tunneling Protocol (GTP) payload, and the wireless device can get timing information directly from the data payload. This minimizes the RAN and/or gNB impact and adds the potential for multiple time domain support.

5G system support for conveying TSN time synchronization

A method performed by a system of a wireless communication network is disclosed. The method relates to provisioning of a time-sensitive service related to a wireless device. The wireless communication network comprises a plurality of antenna reference points, ARPs, of one or more radio access network nodes of the wireless communication network. The method comprises obtaining information that a first ARP and a second ARP of the plurality of ARPs are to provide the time-sensitive service to the wireless device, determining, by inter-ARP radio signalling between ARPs of one or more pairs of the plurality of ARPs, one of the one or more pairs including the first ARP and one of the one or more pairs including the second ARP, a relative timing error between the first ARP and the second ARP, and taking the determined relative timing error into consideration when providing the service to the wireless device.

Methods and systems for providing time-sensitive services related to wireless devices

According to certain embodiments, a method in a network node for delivering a time synchronization service comprises obtaining a timing accuracy threshold for a time synchronization service provided to a wireless device; determining, based on a first timing accuracy error at the network node and a second timing accuracy error between the network node and the wireless device, that a timing accuracy of the time synchronization service is equal or superior to the timing accuracy threshold, and transmitting the time synchronization service to the wireless device with a timing accuracy equal or superior to the timing accuracy threshold. The method further comprises, in response to determining that the timing accuracy of the time synchronization service is inferior to the timing accuracy threshold, reconfiguring the network node to improve the timing accuracy of the time synchronization service.

Optimized time synchronization for a UE

In a radio communications network using a TDD structure to communicate with UE terminals, a radio network node applies such a TDD structure that at least one guard period is included in each slot between a downlink transmission period containing at least one downlink symbol and an uplink reception period containing at least one uplink symbol. Each guard period represents an interval during which the radio network node does not transmit any data. The radio network node allocates the guard periods dynamically by checking whether at synchronization degradation criterion is fulfilled; and if at least one of the at least one synchronization degradation criterion is fulfilled, the radio network node increases the guard period to have an extended duration relative to a previous duration.

Radio communication using a time division duplex structure

Growing community of inventors

Hägersten, Sweden

Mårten Wahlström