Telefonaktiebolaget Lm Ericsson (publ)

Nokia Corporation

Broadcom Corporation

Helka-Liina Määttänen

Siva Dharshan Muruganathan

Muhammad Ali Kazmi

Robert Baldemair

Xingqin Lin

Jonas Sedin

Olof Liberg

Shiwei Gao

Björn Hofström

Sebastian Euler

Talha Khan

Icaro L J Da Silva

Henrik Rydén

Pradeepa Ramachandra

Zhenhua Zou

Mihai Enescu

Mats Folke

Tommi Tapani Koivisto

Hazhir Shokri Razaghi

Iana Siomina

Yi-Pin Eric Wang

Sebastian Faxér

Henning Wiemann

Gino Masini

Stefan Eriksson Löwenmark

Timo E Roman

Shuang Tan

Mattias Frenne

Erik Bengt Dahlman

Andreas Nilsson

Timo Erkki Lunttila

Stefan Rommer

Magnus Åström

Emre Yavuz

Virgile Garcia

Martin Israelsson

Lei Bao

Sven Jacobsson

Sebastian FAXÉR

Edgar Ramos

Kari Pietikäinen

Sebastian Faxé

Systems and methods related to cell selection based on random access channel pre-compensation features supported by a wireless device are disclosed. In one embodiment, a method performed by a wireless device comprises obtaining information that indicates one or more random access channel pre-compensation features required for wireless devices to select a cell. The method further comprises making a decision as to whether the wireless device is permitted to select the cell based on the information and one or more random access channel pre-compensation features supported by the wireless device and performing one or more actions in accordance with the decision.

Methods for cell selection and PLMN selection based on RACH precompensation

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

Systems and methods are disclosed herein for activation of two or more Transmission Configuration Indication (TCL) states for a Physical Downlink Control Channel (PDCCH) in one or more Control Resource Sets (CORESETs) in a cellular communications system. In one embodiment, a method performed by a wireless communication device for activation of multiple TCI states for a PDCCH in one or more CORESETs in a cellular communications system comprises receiving, from a network node, signaling that activates NTCI TCI states for one or more CORESETs, wherein NTCI>1. In this manner, activation of two or more TCI states for PDCCH in one or more CORESETs is enabled.

Activation of two or more TCI states for one or more CORESETs

Systems and methods of PUCCH reliability are provided. In some embodiments, a method performed by a wireless device includes: receiving an activation command to activate a first and a second spatial relation; optionally determining the first and the second spatial relation based on one or more Downlink TCI states; transmitting the UCI according to the first spatial relation in a first set of symbols or slots; and transmitting the UCI according to the second spatial relation in a second set of symbols or slots. In this way, fewer changes to the specifications are required. The existing RRC configuration for spatial relations and MAC CE activation might be used. Spatial relations might be selected by the MAC CE. Also, the existing DCI can be used where a PUCCH resource is selected by PRI bits. Since MAC CE is used to select spatial relations, different combinations can be selected dynamically.

Systems and methods of PUCCH reliability enhancement

A method performed by a wireless device for mapping data to specific HARQ processes is provided. The method includes receiving an indication that maps data that can be sent on one or more of specific HARQ processes and transmitting/receiving a transmission for the specific HARQ process based on the received indication. A method performed by a base station for mapping data to specific HARQ processes is also provided. A wireless device and a base station for mapping data to specific HARQ processes are also provided.

LCH mapping to HARQ process ID for non-terrestrial networks

There is provided a method, in a wireless device, for transmitting a reference signal. The method comprises: receiving a configuration via Radio Resource Control (RRC) from a network node, the configuration comprising a list of slot offset values configured for a Sounding Reference Signal (SRS) resource set; receiving Downlink Control Information (DCI) triggering the SRS resource set, wherein the DCI contains a slot offset bitfield for indicating one of the slot offset values in the list of slot offset values and wherein each entry of the list of slot offset values corresponds to a codepoint of the slot offset bitfield; and transmitting a reference signal using SRS resources configured in the triggered SRS resource set based on the indicated slot offset value.

Methods and nodes for updating aperiodic SRS slot offset

Systems and methods are disclosed herein for enabling a User Equipment (UE) to perform cell quality derivation in a wireless communication network utilizing parameters from an appropriate measurement object. In some embodiments, a method of operation of a UE to perform cell quality derivation in a wireless communication network includes the UE receiving, via Radio Resource Control (RRC) signaling, a measurement configuration that includes a list of measurement objects. The UE receives a serving cell configuration including frequency information that specifies an absolute frequency of a Synchronization Signal block (SSB) corresponding to a serving cell. The UE selects a measurement object in the list of measurement objects that specifies an SSB frequency having a same value as the specified absolute frequency.

Resolving ambiguities related to NR cell quality derivation

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

Methods and apparatus for obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between a wireless device and a network node. In one embodiment a method is performed by a wireless device for operating in a non-terrestrial network, NTN, the NTN having at least one network node and a communication satellite, wherein the at least one network node is one of a terrestrial base station and a satellite base station or satellite gateway, the method includes obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between the wireless device and the network node and applying the frequency offset to an uplink transmission to the network node.

Frequency offset in non-terrestrial networks

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 method is performed by a wireless device for communication in a non-terrestrial network, NTN, comprising at least a first non-terrestrial network node and a second non-terrestrial network node. The method includes determining an estimated location of the wireless device. The method further includes obtaining first location information associated with the first non-terrestrial network node and second location information associated with the second non-terrestrial network node. The method further includes calculating an estimated signal time arrival difference based on the location of the wireless device, the first location information, and the second location information. The method further includes using the estimated signal time arrival difference to provision an NTN-specific synchronization signal/physical broadcast channel, SS/PBCH, block measurement timing configuration, NTN-SMTC.

Detection of neighboring satellites in wireless communication systems

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)

A wireless device is configured to perform measurements for radio resource management (RRM) and/or radio link monitoring (RLM). The wireless device performs a plurality of radio measurements. The wireless device filters at least a first subset of the radio measurements using a first filtering configuration and filters at least a second subset of the radio measurements using a second filtering configuration, where the second filtering configuration differs from the first filtering configuration. The first and second filtering configurations apply to first and second different types of reference signals, respectively, or to beam-level measurements and cell-level measurements, respectively.

Enhanced measurement filtering configurations for radio-link management and radio resource management

Embodiments include methods for operating a user equipment (UE) in a non-terrestrial network (NTN) that utilizes one or more polarization modes for serving one or more cells. Such methods include sending, to a network node, an indication of one or more polarization capabilities of the UE. Such methods also include transmitting and/or receiving one or more signals or channels in a first cell of the NTN according to the indicated polarization capabilities of the UE. In some embodiments, the indicated polarization capabilities of the UE include: a UE type; one or more polarization modes supported by the UE; a polarization correspondence between uplink and downlink signals that is supported by the UE; and/or a list of antenna panels supported by the UE and polarization modes supported by the antenna panels. Other embodiments include complementary methods for operating network nodes, and UEs and network nodes configured to perform such methods.

Methods for indicating polarization capabilities of user equipment in a non-terrestrial network (NTN)

A system, method and non-transitory computer readable media for facilitating reduced signaling load with respect to UE location reporting in a non-terrestrial network (NTN) environment () interoperable with one or more terrestrial cellular communications networks. In one embodiment of an index-based location reporting scheme, a UE () may receive () a list of reference locations from a network node (), each identified with an index. Responsive to receiving the list of reference locations, the UE () may report to the network node () an index or a subset of indices of one or more reference locations that match a specific reporting criterion. In an example implementation, reporting of index-based location information by the UE () may be configurably triggered, e.g., periodically or in response to the occurrence of a particular event, condition, etc.

System and method for facilitating index-based positioning in a non-terrestrial network

Growing community of inventors

Helsinki, Finland

Helka-Liina Määttänen