Telefonaktiebolaget Lm Ericsson (publ)

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Santhan Thangarasa

Muhammad Ali Kazmi

Kazuyoshi Uesaka

Joakim Axmon

Iana Siomina

Johan Mikael Bergman

Stefano Sorrentino

Bengt Lindoff

Yutao Sui

Dandan Hao

Magnus Åström

Ritesh Shreevastav

Torgny Palenius

Zhenhua Zou

Gerardo Agni Medina Acosta

Florent Munier

Sandeep Narayanan Kadan Veedu

Johan Rune

Yufei W Blankenship

Yi-Pin Eric Wang

Robert Mark Harrison

Mattias Bergström

Gabor Fodor

Claes Tidestav

Olof Liberg

Marco Belleschi

Anders Wallén

Ali Nader

Imadur Rahman

Mats Folke

Christopher Peter Callender

Sina Maleki

Zhi Zhang

Congchi Zhang

Dung Pham Van

Hazhir Shokri Razaghi

Bogdan Timus

Luca Feltrin

Jose Angel Leon Calvo

Chunhui Zhang

David Eriksson

Haris Celik

Systems and methods for User Equipment (UE) operation in presence of Clear Channel Assessment (CCA) are provided. In some embodiments, a method performed by a wireless device for cell selection accounting for requirements includes: determining a measurement period in a serving cell for the cell selection or cell re-selection (T1), wherein the measurement period is determined based on a number of consecutive Discontinuous Reception (DRX) cycles; determining a number of measurement occasions configured with a Discovery Reference Signal (DRS) in the serving cell during T1; determining availability of the DRS at the measurement occasions; and performing measurement based on availability of the DRS at the measurement occasions during T1. In this way, a wireless device may operate in NR RRC_IDLE/RRC_INACTIVE in the presence of CCA, e.g., Listen-Before-Talk (LBT).

Systems and methods for UE operation in presence of CCA

A wireless device () 'relaxes' the radio-signal measurements it makes with respect to a wireless communication network (), in the context of using those measurements to determine whether a current Timing Advance, TA, value remains valid for use in transmitting on preconfigured uplink resources, PUR, of the wireless communication network (). Relaxation refers to the length of the interval between making new measurements. According to techniques herein, the wireless device () operates according to an imposed limit on the extent or degree of relaxation, to ensure or at least improve the reliability of the radio measurements with respect to validation of the TA value. Determination of the extent of relaxation occurs at the wireless device () or at a supporting network node () of the wireless communication network ().

Method and apparatus for controlling transmission on preconfigured uplink resources in a wireless communication network

A method performed by a Network Node (NN) for handling Device to Device (D2D) operation between a first D2D User Equipment (UE) and a second D2D UE in a radio communications network is provided. The NN obtains data related to propagation delay in one or more cells served by the NN. The propagation delay is related to any one or more out of: the first D2D UE, the second D2D UE, other D2D UEs, and cellular UEs. The NN then determines whether or not to configure a number of Guard Period (GP) symbols within a switching time resource, as Sidelink (SL) radio resources for the D2D operation. The determining is based on one or more criteria applied to the obtained data related to the propagation delay.

Network node, device to device user equipment, and methods in a radio communications network

Methods performed by a wireless device and a base station for adapting maximum allowed Clear Channel Assessment (CCA) based on operational occasion periodicity are provided. In examples disclosed herein, a wireless device is configured to determine an operational occasion periodicity of a signal that is subject to CCA. Accordingly, the wireless device can determine an association at least between the determined operational occasion periodicity and a maximum number of allowed CCA failures for communicating the signal. The wireless device can then perform one or more operational tasks based on the determined maximum number of allowed CCA failures. By determining the maximum number of allowed CCA failures, the wireless device can obtain information about downlink CCA failures and use the obtained information for adapting measurements procedures in serving cell operational tasks.

Adapting maximum allowed CCA failures based on single occasion periodicity

Systems and methods for validating one or more parameters are provided. In some embodiments, a method performed by a wireless device for validating parameters includes: obtaining information about measurement change for validating one or more parameters; obtaining information about a number of thresholds and associated thresholds used for validating the one or more parameters; and performing parameter validation based on the obtained information. In some embodiments, this is for a Timing Advance (TA) parameter for a Preconfigured Uplink Resources (PUR) transmission. In this way, TA validation becomes more reliable as the validation range can be adapted to the wireless device mobility.

Systems and methods for validating parameters

Method for a user equipment, UE), to communicate with a wireless network via multiple cells. The method includes detecting () failure of a first beam associated with a first cell of the plurality of cells and determining () availability or unavailability of other beams, than the first beam, that are associated with the first cell. The method further includes transmitting (), to one of the multiple cells, a message indicating availability or unavailability of the other beams associated with the first cell. The message is transmitted within a first duration () after detecting the failure of the first beam, the first duration based on a maximum time for determining availability of the other beams and on a periodicity of resources allocated for beam failure reporting in the cell where the message is transmitted. Other embodiments include complementary method for a network node, UE and network node configured to perform such method.

Beam failure recovery in multi-cell configuration

Systems and methods for providing power savings at a wireless communications device in coordination with early measurement reporting are disclosed. In one embodiment, a method performed by a wireless communication device comprises obtaining first information for determining whether the wireless communication device meets criteria for entering into one or more relaxed measurement modes and obtaining second information about whether the wireless communication device is configured with early measurement reporting. The method further comprises selecting a measurement mode from a set of measurement modes comprising the one or more relaxed measurement modes and a normal measurement mode. In one embodiment, selecting the measurement mode comprises determining, based on the first information, whether the wireless communication device meets the criteria for entering into the one or more relaxed measurement modes and selecting one of the set of measurement modes based on upon results of the determining and based on the second information.

UE power saving mechanism under early measurement reporting

A method, system and apparatus for semi-persistent channel state information (CSI) reporting procedures with uplink (UL) clear channel assessment (CCA) are disclosed. According to one aspect, a method includes receiving a signal indicating activation or deactivation of semi-persistent channel state information (CSI) reporting and responsive to receiving the signal, attempt to transmit a Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK), the attempt being subject to success or failure of a clear channel assessment (CCA). When the CCA fails and when the signal indicates activation, the method includes refraining from CSI measurement and reporting unless CCA subsequently succeeds before expiry of a time interval. When the CCA fails and when the signal indicates deactivation, the method includes continuing CSI measurement but refraining from CSI reporting unless CCA subsequently succeeds before expiry of a time interval.

Semi-persistent channel state information reporting procedure with uplink clear channel assessment

One embodiment provides a method performed by a wireless device. The method comprises: receiving, from a network node, a configuration message comprising an indication of preconfigured radio resources for uplink transmissions; obtaining a synchronization status of the wireless device with respect to the network node; and adapting use of the preconfigured radio resources based on the synchronization status of the wireless device with respect to the network node.

Methods, apparatus and computer-readable mediums relating to uplink transmissions

A first and second UE are connected via a PC5 unicast link. Both maintain a list of potential Side link relay UEs and agree on a common list of UEs that appear in both lists. When the first UE detects that the second UE has trouble receiving it's transmission, e.g. ack/nack timeout or high level of NACKs, decide to use a third UE from the common list as Side Link relay towards the second UE.

Maintaining sidelink (SL) operation under radio link failure (RLF) using UE-to-UE relay

A communication device configured to operate in a communications network that includes a network node can determine that the communication device will perform a radio link procedure ('RLP') in a mode of operation. The communication device can further determine information associated with a channel monitoring pattern (“CMP”) based on determining that the communication device will perform the RLP in the mode of operation. The communication device can further monitor a channel between the network node and the communication device based on the information associated with the CMP.

Adapting channel monitoring patterns under power saving

Systems and methods for narrowband measurements and reporting in a cellular communications system are disclosed. Embodiments of a method performed by a wireless device are disclosed. In some embodiments, the method performed by the wireless device comprises determining a set of narrowbands on which to perform measurements, wherein the set of narrowbands on which to perform measurements is a subset of all narrowbands within a respective system bandwidth. The method further comprises performing measurements on the set of narrowbands during one or more time periods associated with a random access procedure, and reporting the measurements or information derived from the measurements to a base station within a message sent from the wireless device to the base station during the random access procedure. In some embodiments, the message sent from the wireless device to the base station during the random access procedure is a Msg3.

Measured narrowbands for MSG3-based reporting

A wireless device () is configured for use in a wireless communication system (). The wireless device () is configured to receive signaling () from a network node (). The signaling () in some embodiments indicates that a reference signal () is configured to be transmitted before and/or during every L occurrence of a physical downlink control channel search space (), wherein L≥2. In other embodiments, the signaling () indicates that a reference signal () is configured to be transmitted before and/or during every K discontinuous reception, DRX, cycle (), wherein K≥2.

Reference signal and early termination in a wireless communication system

A wireless device performs an uplink transmission, such as an idle-mode uplink transmission using preconfigured uplink resources (PUR). The wireless device determines whether a serving-cell signal measurement M2 was completed within a predetermined range of time before a reference time T2, the reference time T2 corresponding to an uplink transmission opportunity. Responsive to determining that the serving-cell signal measurement M2 was not completed within the predetermined range of time, the wireless device either defers transmission to a subsequent transmission opportunity, or drops the uplink transmission, or collects an additional serving-cell measurement M2' that falls within the predetermined range of time, for use in validating a TA for transmitting at the transmission uplink opportunity and/or for estimating a PL for power control of a transmission at the uplink transmission opportunity.

Methods for validating measurements for reliable PUR transmissions

A method by a wireless device includes receiving a message from a radio access network, RAN, node serving the wireless device including an indication of failure of a clear channel assessment, CCA, procedure by the RAN node on a wireless channel, and adapting a serving cell procedure in response to the message. A method by a RAN node, includes performing a CCA on a downlink channel, determining based on the CCA whether or not the downlink channel is occupied, and transmitting a message to a wireless device including an indication of a CCA failure based on a determination that the downlink channel was occupied. Related wireless devices and network nodes are disclosed.

Growing community of inventors

Vällingby, Sweden

Santhan Thangarasa