Telefonaktiebolaget Lm Ericsson (publ)

Olof Liberg

Mårten Sundberg

Xingqin Lin

Yutao Sui

Yi-Pin Eric Wang

John Walter Diachina

Andreas Höglund

Johan Mikael Bergman

Stefan Eriksson Löwenmark

Paul Schliwa-Bertling

Henrik Rydén

Helka-Liina Määttänen

Jonas Sedin

Talha Khan

Emre Yavuz

Sara Modarres Razavi

Fredrik Gunnarsson

Miguel Lopez

Tuomas Tirronen

Sebastian Euler

Nicklas Johansson

Martin Van Der Zee

David Sugirtharaj

Björn Hofström

Ravitej Ballakur

Jens Bergqvist

Emma Wittenmark

Mai-Anh Phan

Sajal Kumar Das

Robert Baldemair

Stefan Parkvall

Erik Bengt Dahlman

Åke Busin

Dung Pham Van

Iana Siomina

Magnus Stattin

Joakim Axmon

Helka-Liina Määttanen

Mats Folke

Magnus Åström

Ritesh Shreevastav

Fredrik Huss

Kazuyoshi Uesaka

Gustav Almquist

Antti Ratilainen

Ulf Händel

Per Gunningberg

Mârten Sundberg

Xun Qiu

Henrik Rydèn

Mattias Frenne

Henrik Sahlin

Siva Dharshan Muruganathan

Anders Wallén

Santhan Thangarasa

Oscar Ohlsson

Christian Skärby

Gerardo Agni Medina Acosta

Gino Masini

Claes-Göran Persson

Mikael Wittberg

Béla Rathonyi

Yuhang Liu

Oskar Drugge

Roland Carlsson

Mohammad Mozaffari

Sandeep Narayanan Kadan Veedu

Luca Feltrin

Johan Zhang

Birgitta Sagebrand

Yi-Ju Chen

Tomas Forssén

Joakim Riedel

Peter Brauer

Måarten Sundberg

Hannes Nordmark

Karin Wahlqvist

Anders Westergren

Sven Hellsten

Margaretha Forsgren

There is provided mechanisms for random access handling of a UE. A method is performed by a network node. The method comprises receiving, from the UE during a first RAO, a first RA preamble, whilst refraining from responding to the first RA preamble. The method comprises transmitting, towards the UE and without the network node first having received any retransmitted RA preamble from the UE, one RAR for each of N possible RA preambles, where each RAR comprises a TA command corresponding to a TA value estimated for the first RA preamble. The method comprises receiving, from the UE during a further RAO, a retransmitted RA preamble. The method comprises determining whether the TA value for the retransmitted RA preamble matches the TA value for the first RA preamble or not.

Random access handling of a UE

A wireless device () obtains () a configuration of a set of periodic uplink resources specific for the device. The configuration configures the set of resources to support: a) a first procedure comprising a first Physical Uplink Shared Channel (PUSCH) transmission of a Message A (MsgA) transmission, b) a second procedure comprising uplink transmissions of, or corresponding to, a two-step Random Access Channel (RACH) procedure comprising, a first Physical Random Access Channel (PRACH) transmission and a second PUSCH transmission, and/or c) a third procedure comprising uplink transmissions of, or corresponding to, a four-step RACH procedure comprising a second PRACH transmission, and a third PUSCH transmission. A Timing Advance (TA) value of at least one of the transmissions is: i) independently configurable between the PUSCH and the PRACH transmissions, ii) configured to be zero, and the wireless device () refrains from validating the TA value, and/or iii) explicitly configured and validated before transmission from inactive or idle.

Wireless device, network node, and methods performed thereby, for handling uplink communication

A method () performed by a wireless device () includes obtaining a remaining service time (T) associated with a first satellite or first spot beam. Based on the remaining service time, the wireless device determines whether to initiate a connection with the first satellite or first spot beam.

Power efficient non-terrestrial network connection establishment

Embodiments herein disclose e.g. a method performed by a wireless device () for handling communication for the wireless device in a second wireless communication network. The second wireless communication network coexists with a first wireless communication network on a same bandwidth in frequency, wherein the first wireless communication network applies a first shift in frequency in uplink transmissions. The wireless device receives from a radio network node (), an indication indicating application of a second shift in frequency to uplink transmissions in case the second wireless communication network uses Frequency Division Duplex (FDD). The wireless device further applies the second shift in frequency to uplink transmissions, wherein the second shift defines a shift in frequency to a subcarrier relative to a subcarrier grid of the second wireless communication network or a shift in frequency to the subcarrier grid of the second wireless communication network.

Radio network node, wireless device and methods performed therein for handling communication in a wireless communication network

A method, system and apparatus are disclosed. In one or more embodiments, a network node for communicating with a wireless device is provided. The network node includes processing circuitry configured to receive measurement capability information of a wireless device where the measurement capability information indicates an ability to perform a global navigation satellite system, GNSS, measurement. The processing circuitry is further configured to determine a GNSS measurement gap configuration during which the wireless device is to perform at least one GNSS measurement during at least one GNSS measurement gap where the GNSS measurement gap configuration is based at least in part on the received measurement capability information, and indicate the GNSS measurement gap configuration to the wireless device.

GNSS measurement gaps

In some embodiments, a method performed by a wireless device comprises: obtaining a timing advance (TA) value for uplink transmissions; receiving a grant for a radio resource control (RRC) inactive mode uplink transmission; measuring a reference signal associated with each beam of a plurality of beams at a first time; selecting a first beam based on the measured reference signals; measuring a reference signal associated with each beam of a plurality of beams at a second time in preparation for the RRC inactive mode uplink transmission; selecting a second beam for which the measuring was performed at the second time; and when the first selected beam is the same as the second selected beam and the reference signal for the first selected beam is within a threshold value of the reference signal for the second selected beam, transmitting the RRC inactive mode uplink transmission using the obtained TA.

NR timing advance change detection

There is provided a method performed by a wireless device for communicating with a network node in a wireless communication network. The method includes using a field in a Master Information Block (MIB) received by the wireless device, as an indication of a presence of an extended MIB (eMIB) and identifying which candidate resource of at least one candidate resource that contains the eMIB based on the indication of the presence of the eMIB. There is also provided a corresponding wireless device for communicating with a network node, a method perform by a network node, and a network node.

Master information block extension in a New Radio cell

Methods performed by base stations and wireless devices for reducing RSRP and/or RSRQ measurements are disclosed. A method performed by a base station comprises indicating to a wireless device whether or not to perform cell selection and/or reselection measurements based on certain criteria. A method performed by a wireless device comprises determining whether or not to perform cell selection and/or reselection measurements based on certain criteria. Also disclosed are base stations and wireless devices configured to perform the methods.

UE procedures for reducing RSRP/RSRQ measurement in RRC idle mode and inactive state

Embodiments include methods for operating a network node in a non-terrestrial network (NTN) that utilizes one or more polarization modes for serving one or more cells. Such methods include transmitting, to one or more user equipment (UEs), an indication of at least one polarization mode configured for use in a first cell of the first NTN. The at least one polarization mode can be indicated in various ways, both explicitly and implicitly. Such methods also include transmitting and/or receiving one or more signals or channels in the first cell according to one or more configured polarization modes including the at least one indicated polarization mode. Other embodiments include complementary methods for operating UEs, as well as network nodes and UEs configured to perform such methods.

Methods for configuring polarization modes in a non-terrestrial network (NTN)

Embodiments of methods for providing timing advance change detection are disclosed. In some embodiments, a method performed by a wireless device for determining a validity of a timing advance configuration of the wireless device for an idle mode transmission includes obtaining, while the wireless device is operating in a connected mode, a timing advance value for the wireless device. The method further includes transitioning from the connected mode to an idle mode, and performing a measurement on one or more serving cells of the wireless device while the wireless device is in the idle mode. The method also includes determining whether the timing advance is valid for an idle mode transmission based on the measurement. In some embodiments, the measurement may be a signal strength measurement, such as a Reference Signal Received Power measurement and/or a signal quality measurement such as, a Reference Signal Received Quality measurement.

Determining timing advance validity in idle mode

A method is performed by a wireless device for performing a random access. In response to a received paging transmission, and when certain conditions are met, the wireless device randomly selects a random access resource from a plurality of available random access resources. The available random access resources may be spread in time, or in frequency, or in time and frequency. The wireless device then transmits a random access signal on the selected random access resource.

Mobile terminated access load control

Disclosed is a method for scheduling transmissions of multiple carriers from a single transmitting network node () for multiple Narrow Band Internet of Things (NB-IoT) cells, (). The multiple carriers comprising a respective cell specific anchor carrier having NB-IoT sub-frames allocated for the transmission of mandatory information related to the functionality of the specific cell. The method comprises scheduling (S) at least two cell specific anchor carriers using time interleaved transmissions that enables NB-IoT sub-frames belonging to different cell specific anchor carriers, and being allocated for the transmission of the mandatory information, to be transmitted at non-overlapping times. Also disclosed is a network device configured to perform the method and a computer program which when executed schedules at least two cell specific anchor carriers using time interleaved transmissions that enables NB-IoT sub-frames belonging to different cell specific anchor carriers and being allocated for the transmission of the mandatory information to be transmitted at non-overlapping times.

Method and devices for scheduling transmissions of carriers to narrowband internet of things cells

According to some embodiments, a method performed by a wireless device for handover in a non-terrestrial network (NTN) from a source cell to a target cell comprises receiving a conditional handover configuration for one or more potential target cells. The conditional handover configuration comprises a condition for handover comprising a timing advance threshold value for each of the one or more potential target cells. The method further comprises determining that a timing advance between the wireless device and one of the one or more potential target cells is less than or equal to the timing advance threshold and based on the determination, performing a handover to the target cell.

Minimizing signaling load during handover for NTN

A network node is configured to monitor battery usage on behalf of the low power device and to predict the SOC and remaining life-time for the batteries in the low power devices. The network nodes are fully powered and have the computational capacity to use more complex and accurate models that are not feasible for implementation in resource-limited devices. The network node can calculate the SOC and remaining life-time for a low power device and may also change the transmission and reception patterns for the device to extend the life-time of the battery.

Battery life-time prediction for low power devices

Embodiments include methods for radio link monitoring (RLM) by a user equipment (UE) in a combined terrestrial and satellite wireless communication network. Such methods include, during a discontinuity in a connection between a UE and a terrestrial network node (TNN), performing RLM of the connection based on a second configuration. Such methods also include, before and/or after the discontinuity, performing RLM of the connection based on a first configuration. The connection includes a first link between the UE and a satellite and a second link between the satellite and the TNN. The discontinuity includes a link switch in at least one of the first link and the second link. The RLM before, during, and after the discontinuity can include various first, second, and third operations, respectively. Embodiments also include complementary methods performed by a TNN, as well as UEs and TNNs configured to perform operations corresponding to such methods.

Configuring radio link monitoring (RLM) for moving radio access network (RAN)

Growing community of inventors

Stockholm, Sweden

Olof Liberg