Telefonaktiebolaget Lm Ericsson (publ)

Satyam Dwivedi

Fredrik Gunnarsson

Erik Stare

Sara Modarres Razavi

Per Ernström

Deep Shrestha

Iana Siomina

Ritesh Shreevastav

Florent Munier

Johannes Nygren

Miguel Berg

Henrik Asplund

Roland A Smith

Magnus Sandgren

Ali Zaidi

Erik Bengt Dahlman

Miguel Lopez

Xingqin Lin

Jonas Medbo

Mike Skof

Avneesh Vyas

Bo Hagerman

Henrik Rydén

Alexander Hunt

Dennis Sundman

Sara Sandberg

Åke Busin

Kimmo Juhani Hiltunen

Garry Irvine

Ursula Challita

Dehan Luan

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

Methods and apparatus are provided. In an example aspect, a method () of estimating a location of a User Equipment (UE) is provided. The method comprises determining () whether a signal transmitted between the UE and a first network node has a line-of-sight (LoS) path between the UE and the first network node, and estimating () the location of the UE based on the signal received at the first network node and based on whether the signal has a LoS path.

Estimating a location of a user equipment

A computer implemented method performed by a network node in a non-public communication network is provided. The method includes predicting a subsequent position of a first communication device served by a public communication network, wherein the first communication device is causing an interference level on the non-public communication network. The method further includes estimating a level of subsequent interference from the first communication device for the subsequent position. The method further includes initiating control of radio resources to reduce the estimated interference level from the first communication device.

Location aware radio resource management in co- existing public and non-public communication networks using predictions

In one aspect, a method for detecting changes in distance between a first wireless device and a second wireless device is provided. The method comprises determining a variation of a parameter over time, based on measurements of first timing signals transmitted between the first and second wireless devices. The variation of the parameter depends on a distance between the wireless devices, and comprises periodic step transitions as a result of relative clock drift between the wireless devices. The method further comprises predicting a time at which a periodic step transition is expected to occur based on the variation of the parameter, and determining a value of the parameter based on measurements of second timing signals. In response to a determination that the determined value of the parameter differs from an expected value of the parameter, it is determined that the distance between the wireless devices has changed.

Methods, apparatus and device-readable mediums for detecting changes in distance between wireless devices

A method performed by a first base station for positioning in a cellular communication system includes receiving, at the first base station, a signal transmitted by a second base station and estimating a Time of Arrival (TOA) of the received signal at the first base station according to a clock of the first base station. The method further includes determining a delta value that is a function of an amount of time between the TOA of the received signal at the first base station and a time reference at the first base station and performing either, (a) providing the delta value to a positioning estimation entity within the cellular communications system or (b) using the delta value at the first base station to reduce a time synchronization error between the first base station and the second base station, or (c) passing the delta value to a User Equipment (UE).

Rx-tx time difference generation, measurement and reporting with neighboring base stations

A method for positioning reference signal configuration comprises receiving, from a network node, one or more first positioning reference signals in a first PRS configuration; performing one or more first measurements on the first PRS to determine one or more first characteristics of the one or more first PRSs; sending, to the network node, a second PRS configuration determined based on the one or more first characteristics; receiving, from the network node, a third PRS configuration, wherein the third PRS configuration comprises one or more third PRSs having at least one different signal characteristic than the one or more first characteristics of the first PRS; and performing one or more second measurements on the one or more third PRSs. The method provides a dynamic configuration for PRS based on the feedback from the UE and a location node, beamforming configuration, or any requirements for physical layer efficiently.

Method for dynamic configuration of reference signal

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

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

A system and method for providing phase noise-based signal design for positioning in a communication system. In one embodiment, an apparatus is configured to receive configuration parameters for a reference signal based on a level of phase noise for the reference signal estimated by a user equipment, apply the configuration parameters to the reference signal to obtain a modified reference signal, and transmit the modified reference signal to the user equipment to enable a position of the user equipment to be determined.

System and method for phase noise-based signal design for positioning in a communication system

A method and network node for uplink coordinated multipoint positioning are disclosed. According to one aspect, a method includes employing a coordinated multipoint function to decode data from a WD using signals received from the WD by the network node and from signals received from the WD by a plurality of cooperating network nodes. The method further includes converting the decoded WD data signal into a time domain reference signal and convert the signals received from the plurality of cooperating network nodes into time domain neighbour signals. The method also includes cross-correlating the time domain reference signal with the time domain neighbour signals to determine a time difference of arrival for each of the plurality of time domain neighbour signals. The method also includes calculating a position of the WD based on the time differences of arrival and based on locations of the cooperating network nodes.

Uplink coordinated multipoint positioning

Methods and apparatuses for determining asynchronization between a first clock used by a first node (N) and a second clock used by a second node (N). A sequence of time differences is measured based on a sequence of signals periodically sent by the second node (N) and received by the first node (N), wherein each time difference of a signal is between a respective transmission timestamp in accordance with the second clock and a respective receiving timestamp in accordance with the first clock; and at least one of a relative phase offset or a relative frequency offset between the first and the second clock is estimated based on the sequence of time differences.

Methods, second node and apparatus for determining clock asynchronization

Some embodiments advantageously provide methods, wireless devices and network nodes for adapting PRS transmission to hide the local clock information of base stations. According to one aspect, an exemplary process includes a network node for transmitting PRS. The process includes delaying or advancing the transmission of at least one positioning reference signal in accordance with received offset information wherein delaying or advancing the transmission according to the offset information shifts the transmission of the at least one positioning reference signal away from a scheduled transmission time for the at least one positioning reference signal transmission.

Provision of positioning reference signals

A method and network node for differential matched summed antenna positioning are disclosed. According to one aspect, a method includes summing sequential uplink data signals at each of a plurality of antennas of the network node to produce a plurality of antenna signal sums. The method also includes selecting one of the antenna signal sums to be used as a reference antenna signal sum. A channel impulse response is determined for each of a plurality of other antennas by cross correlating the reference antenna signal sum with the others of the plurality of antenna signal sums. The method further includes estimating a time difference of arrival from the channel impulse responses of the plurality of antennas, and estimating an error of the estimated time difference of arrival of each antenna. A position of a wireless device is determined using the estimated time differences of arrival.

Differential matched summed positioning

Methods and apparatuses for determining a position of a wireless device in a wireless communication network are provided. The method includes obtaining a first sequence of Time Difference of Arrivals (TDOAs) at the wireless device of reference signals, which are transmitted by and used for synchronization of a first pair of network nodes; and determining, based on the first sequence of TDOAs, a first relative distance. The method also includes obtaining a second sequence of TDOAs at the wireless device of reference signals, which are transmitted by and used for synchronization of a second pair of network nodes; and determining, based on the first sequence of TDOAs, a second relative distance. The method further includes determining the position of the wireless device based on the first and second relative distances. Corresponding computer programs and computer program carriers are also disclosed.

Growing community of inventors

Solna, Sweden

Satyam Dwivedi