Telefonaktiebolaget Lm Ericsson (publ)

St-ericsson Sa

Kazuyoshi Uesaka

Santhan Thangarasa

Muhammad Ali Kazmi

Iana Siomina

Elias Jonsson

Joakim Axmon

Johan Mikael Bergman

Ritesh Shreevastav

Yufei W Blankenship

Yutao Sui

Yi-Pin Eric Wang

Olof Liberg

Torgny Palenius

Zhenhua Zou

Gerardo Agni Medina Acosta

Florent Munier

Luca Feltrin

Claes Tidestav

Mårten Sundberg

Andreas Höglund

Niklas Andgart

Stefan Wänstedt

Ali Nader

Imadur Rahman

Nicklas Johansson

Emre Yavuz

Christopher Peter Callender

Sara Modarres Razavi

Douglas Allan Cairns

Sina Maleki

Åke Busin

Waikwok Kwong

Cecilia Eklöf

Dung Pham Van

John Camilo Solano Arenas

Jaroslaw Niewczas

Talha Khan

Yoshitaka Murata

Amit Singh

Hiroaki Watabe

Hisashi Onozawa

Eric Blanquer

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

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

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

According to some embodiments, a method performed by a wireless device operating in connected mode for reporting channel quality comprise: determining that aperiodic channel quality reporting has been triggered for the wireless device and transmitting a downlink channel quality report to a network node. A channel quality in the report is represented by a number of repetitions used to receive a channel. In particular embodiments, the number of repetitions comprises a number of repetitions used to receive a machine type communication (MTC) physical downlink control channel (MPDCCH) or a narrowband Internet-of-things (NB-IoT) physical downlink control channel (NPDCCH).

Channel quality reporting in LTE-M and NB-IoT

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 method performed by a wireless device for monitoring a radio link with a base station is disclosed. The method comprises performing a measurement on at least one reference signal received from a base station and converting a result of the measurement to a BLER of a hypothetical Downlink Control Channel transmission from the base station using a mapping. The method further comprises comparing the converted result to at least one threshold to determine whether the wireless device is in synchronization with the base station, triggering a measurement event on the basis of the comparison, and selecting, on the basis of the triggered measurement event, a mapping for use in a subsequent conversion of a measurement result. Also disclosed are a method performed by a base station, a wireless device, a user equipment and a base station.

Radio link monitoring

A method, system and apparatus are disclosed. A network node configured to communicate with a wireless device (WD) is provided. The network node is configured to, and/or comprising a radio interface and/or comprising processing circuitry configured to: determine a radio link monitoring (RLM) state of a wireless device that is served by a first cell and configured to operate with at least a first operational mode and a second operation mode within an overlapping time, and schedule at least one signal associated with the wireless device based on the RLM state.

Methods for managing parallel measurement gap patterns for radio resource management and positioning measurements

Systems and methods for determining and using a reference signal muting configuration are provided. A network can configure a muting configuration for a first reference signal in accordance with determining if the first reference signal is used by a wireless device for operating a channel. The first reference signal can be transmitted in accordance with the muting configuration and used by the wireless device to perform an operation.

Adaption of reference signal muting configuration

A system in which a wireless communication device (e.g. a NB-IoT device) can obtain assistance information from a location server which can help the WCD select the right target RAT. A method performed by a wireless communication device, the method comprising: receiving inter-Radio Access Technology (inter-RAT) assistance information; determining a RAT based on the received inter-RAT assistance information; and utilizing the determined RAT.

Location server assisted mobility evaluation for power limited wireless communication devices

Methods and apparatuses are disclosed for communicating to a wireless device (WD) a DL-to-UL frequency offset (or frequency shift) that may need to be applied. For example, a method implemented in a wireless device (WD) is provided. The method comprises: receiving, from the network node, an indication of a frequency offset; and applying the received frequency offset; wherein the WD is configured to operate on a narrow-band Internet of Things (NB-IoT) carrier in a New Radio (NR) carrier.

Methods and apparatuses for signalling a frequency offset in a NB-IoT TDD network

Apparatuses and methods for band scanning in lean carrier operation are disclosed. In one embodiment, a method for a network node includes identifying at least one time period for transmitting a reference signal over a full cell bandwidth in lean earner operation, and transmitting a reference signal according to a bandwidth pattern. The bandwidth pattern is based at least in part on the identified at least one time period.

Method for band scanning when reference signal is transmitted over reduced bandwidth

A method of operating a first communication node includes receiving a communication at the first communication node from a second communication node, wherein the communication includes information bits in a plurality of information bit positions, determining, by the first communication node, a subset of the information bit positions of the communication that are punctured wherein the determining is performed based on detected or decoded control information, and responsive to determining the subset, reducing, by the first communication node, magnitudes of information bits in the subset of the information bit positions that are punctured.

Improving decoding by using known puncturing information

According to some embodiments, a method performed by a wireless device for lean carrier operation comprises obtaining lean carrier assistance information (LCAI). The LCAI comprises one or more of the following sets of information for a carrier frequency: reference signal (RS) muting pattern information, wherein the RS muting pattern information provides a RS muting pattern used in one or more cells on the carrier frequency; and coverage area information, wherein the coverage area information indicates a coverage area where the RS muting is applied or is expected to be applied on one or more cells operating on the carrier frequency. The method further comprises performing one or more radio operational tasks using the LCAI.

Growing community of inventors

Kawasaki, Japan

Kazuyoshi Uesaka