Telefonaktiebolaget Lm Ericsson (publ)

Telia Company Ab

Per Ernström

Mattias Frenne

Iana Siomina

Håkan Björkegren

Florent Munier

Ritesh Shreevastav

Erik Stare

Fredrik Gunnarsson

Stephen J Grant

Karl Werner

Satyam Dwivedi

Deep Shrestha

Johannes Nygren

Havish Koorapaty

Kumar Balachandran

Rajaram Ramesh

Lars Lindbom

Gino Masini

Åke Busin

Shiau-He Tsai

Kiran Thakare

Siva Dharshan Muruganathan

Mats Näslund

Henrik Asplund

Sara Modarres Razavi

Magnus Sandgren

Jonas Medbo

Shiau-He Shawn Tsai

Kai Yu

(Jason) Tsao-Tsen Chen

Sten Ingemar Sjoberg

Tsao-Tsen (Jason) Chen

Yazid Lyazidi

Xiaolin Jiang

Gino Luca Masini

Håkan BJÖRKEGREN

Shiau-He S Tsai

A method, wireless device and network node are disclosed. According to one aspect, a method for a wireless device includes receiving a configuration of a reference signal resource set from the network node, the reference signal resource set being a set of single-symbol and single antenna port reference signal resources in at least one slot; and based on at least one parameter of the received configuration, determining whether the UE can assume a same antenna port for all reference signal resources of the reference signal resource set.

Methods and apparatuses for downlink tracking reference signal configuration

Methods and apparatuses provide a mechanism to account for timing errors of a wireless device () in positioning measurements. In one example, a wireless device () performs reference-signal transmissions or measurements and sends information to a network node () that is involved in positioning of the wireless device (). The information indicates associations of the reference-signal transmissions or measurements with respective timing groups of the wireless device (). Each timing group represents a related set of transmission or reception timing errors within the wireless device (). Based on the information, the network node () accounts for the different timing-group associations when performing positioning calculations that are based on the reference-signal transmissions or measurements performed by the wireless device ().

Methods and apparatuses to account for timing errors of a user equipment in positioning measurements

A method in a network node and a network is provided to determine line of sight, LOS, base stations for a user equipment (UE) is provided. A request is provided to at least one of the UE and a plurality of base stations to measure and report LOS detection measurements, wherein the plurality of base stations includes base stations of a serving cell of the UE. The LOS detection measurements are received from the at least one of the UE and the plurality of base stations. LOS base stations for the UE are determined based on the LOS detection measurements. An indication of the LOS base stations is transmitted to the UE.

Line of sight detection based on channel impulse response reported

Embodiments described herein relate to methods and apparatus in networks, and particularly methods, Location Management Functions, base stations and wireless devices for configuring and sending uplink sounding reference signals (UL SRS). An example method performed by a Location Management Function (LMF) comprises receiving radio resource information relating to radio resources that can be applied for UL SRS by a wireless device; and providing a notification relating to triggering aperiodic uplink SRS to a base station serving the wireless device.

Signalling support for NR positioning with aperiodic SRS configurations

There is disclosed a method of operating a network node in a radio access network, the method including transmitting reference signaling based on a reference signaling configuration, the reference signaling configuration corresponding to a comb-n structure for a symbol group of a slot, wherein the reference signaling configuration corresponds to a staggered and/or re-ordered comb-n structure for one or more other symbol groups of the slot. The disclosure also pertains to related devices and methods.

Positioning reference signaling

A method performed by a user equipment, UE includes obtaining a Sounding Reference Signal, SRS, configuration from a network node and determining an SRS waveform and transmitting the SRS waveform. The SRS waveform is adapted for positioning based on the SRS configuration to have a full bandwidth within a bandwidth applicable for the SRS waveform.

Methods and apparatuses for positioning based on the sounding reference signal

A method, system and apparatus are disclosed. In one or more embodiments, a method in a wireless device is provided. The wireless device is configured to communicate with a network node. The wireless device receives an extended signal transmitted by the network node. The extended signal includes a base signal and at least one additional signal. The wireless device estimates a time of arrival, TOA, based on the extended signal.

Wireless device, network node and methods performed therein for time of arrival estimation

Embodiments of the disclosure provide methods, apparatus and machine-readable mediums relating to reference signals for positioning in a wireless network. A method performed by a wireless device relating to positioning in a wireless network is provided. The method comprises receiving user data, and a reference signal for positioning in a transmission from a radio network node. The method further comprises rate matching the user data over one or more radio resources not used by the reference signal.

Methods, apparatus and machine-readable mediums relating to reference signals for positioning in a wireless network

Signalling Support for NR Positioning with Aperiodic SRS ConfigurationsEmbodiments described herein relate to methods and apparatus in networks, and particularly methods, Location Management Functions, base stations and wireless devices for configuring and sending uplink sounding reference signals, UL SRS. 1. A method performed by a Location Management Function, LMF, comprises receiving radio resource information relating to radio resources that can be applied for UL SRS by a wireless device; and providing a notification relating to triggering aperiodic uplink SRS to a base station serving the wireless device.

A method, network node and wireless device for position reference signal (PRS) design by extending a base signal are disclosed. According to one aspect, a method in a wireless device (WD) includes obtaining extended reference signal, RS, configurations from the network node. The method also includes determining a waveform associated with the extended RS. The method also includes detecting a RS and estimate an associated time of arrival. The method further includes sending a measurement report to the network node based on the estimated time of arrival.

PRS design by extending the basic signal

Radio equipment () is configured for tap separated channel estimation in a wireless communication system. The radio equipment () obtains a channel estimate () of a radio channel over which a reference signal () is received, and separates the channel estimate () into channel estimate components () that correspond to respective channel taps (). The radio equipment () then compensates the channel estimate components () for Doppler shifts respectively associated with the channel taps () to which the channel estimate components () correspond. The radio equipment () processes the compensated channel estimate components () separately. Such processing comprises filtering, interpolating, and/or extrapolating. The radio equipment () then de-compensates the processed channel estimate components () for the respective Doppler shifts, and forms a combined channel estimate () of the radio channel by combining the de-compensated channel estimate components ().

Channel estimation in a wireless communication system

A radio node () is configured to perform frequency offset estimation. The radio node () in this regard receives a first set (-) of reference symbols of a reference signal during respective time resources, and determines a first frequency offset estimate (-) using the first set (-) of reference symbols. The radio node () also receives a second set (-) of 5 reference symbols of the reference signal during respective time resources, e.g., using the same local oscillator frequency for down conversion as with the first set (-). The radio node () further determines, based on the first frequency offset estimate (-), a second frequency offset estimate (-) using the second set (-) of reference symbols. In some embodiments, the radio node () determines a third frequency offset estimate as a sum of the first and 10 second frequency offset estimates, and tunes a local oscillator frequency, or performs frequency offset compensation, based on the third frequency offset estimate.

Frequency offset estimation

Growing community of inventors

Stockholm, Sweden

Per Ernström