Telefonaktiebolaget Lm Ericsson (Publ)

Optis Wireless Technology, LLC

Nokia Corporation

Optis Cellular Technology, LLC

Idtp Holdings, Inc.

David Astely

Stefan Parkvall

Robert Baldemair

Yang Hu

Erik Bengt Dahlman

George Jöngren

Daniel Chen Larsson

Jianfeng Wang

Xinghua Song

David Hammarwall

Tobias Tynderfeldt

Dirk Gerstenberger

Lei Wan

Henrik Asplund

Muhammad Ali Kazmi

Erik A Eriksson

Ali Behravan

Per Johan Anders Nyström

Johan Torsner

Niklas Andgart

Mattias Andersson

Per Skillermark

Niklas Jaldén

Ylva Jading

Muhammad Imadur Rahman

Bengt Lindoff

Sorour Falahati

Bo Göransson

Helka-Liina Määttanen

Jung-Fu Cheng

Lars Lindbom

Jonas Fröberg Olsson

Arne Simonsson

Riikka Susitaival

Imadur Rahman

Mats Fredrik Sågfors

Yngve Selén

Hannes Ekström

George Jongren

Erik Westerberg

Leif Wilhelmsson

Stefano Sorrentino

Andreas Nilsson

Henrik Sahlin

Johan Mikael Bergman

Zhiheng Guo

Hai Feng Wang

Johan Nilsson

Anders Furuskär

Peter Larsson

Ruiqi Zhang

Martin Johansson

Yu Qian

Karl Werner

Johan Axnäs

Johan Sköld

Sara Sandberg

Jonas B Karlsson

Per Burström

Kjell Larsson

Magnus Lundevall

Richard Abrahamsson

Johan Nyström

Per Johan Torsner

Johan Nystrom

Pål Frenger

Robert Mark Harrison

Sebastian Faxér

Sven Oscar Petersson

Henning Wiemann

Fredrik Athley

Jacobus Cornelis Haartsen

Michael Meyer

Gustav Wikström

Zhipeng Lin

Karl James Molnar

Andrew Logothetis

Jingyi Liao

Eliane Semaan

Chrysostomos Koutsimanis

Benny Lennartson

Svante Signell

Eric Nordström

Bjorn Johannisson

Alireza Nejatian

Tomas Sundin

Shashi Kant

Olle Rosin

Atte Artamo

Ling Su

Daniel Larsson

Per Magnus Lundevall

Tobias Rydén

Oskar Nordmark

Fan Sun

Johan AXNÄS

Mats Sågfors

Embodiments of the present disclosure provide methods and apparatuses for random access procedure. A method performed by a terminal device comprises transmitting multiple preambles on different transmission chains of the terminal device to a network node. The multiple preambles are associated with a same or different synchronization signal and physical broadcast channel block (SSB).

Method and apparatus for random access procedure

Method and one or more first devices for supporting calibration of a multi-antenna array comprised in a first antenna device operative with a wireless communication network. The first device(s) provide phase correcting information, to be used in calibration of the multi-antenna array, based on covariances corresponding to recurrent displacement vectors of the multi-antenna array. Said covariances being based on channel estimates estimated from certain radio signals received after transmission over radio propagation channels between said multi-antenna array of the first antenna device and one or more second antenna devices operative with the wireless communication network.

Method and device(s) for supporting calibration of a multi-antenna array comprised in an antenna device operative with a wireless communication network

The invention discloses a method for a cellular communications system, in which traffic is sent in frames, each frame comprising a first number of subframes, with a second number of said subframes being available for at least either uplink or downlink traffic. At least one of said second number of subframes is made to comprise at least three parts, as follows:

TDD time slot splitting

Method and apparatus for conveying feedback reports from a data receiving party () for data received from a data sending party () in a wireless connection. A plurality of feedback resources () assigned to different feedback information codes are allocated to the data receiving party for transmitting feedback reports. After checking whether the data was received correctly or not, the data receiving party selects a feedback resource (FR) with a feedback information code that corresponds to one or more feedback reports on the received data. The data receiving party then sends feedback information on the selected feedback resource to the data sending party, thereby conveying the corresponding feedback information code. In this way, multiple feedback reports can be conveyed in a single feedback resource to the data sending party while still retaining single carrier properties.

Method for implicit conveying of uplink feedback information

The invention relates to methods and communication devices in a network comprising the steps of mapping and allocating a first random access resource to a first frequency in an uplink subframe of a radio frame, and transmitting an expression on the radio channel expressing mapping of the first random access resource to use in relation to at least one uplink subframe.

Methods and devices for transmitting/receiving data based on the allocation of random access resources to uplink subframes

The present disclosure relates to a method performed by a network node for beamforming, to a network node and to a system including a network node. One aspect of the disclosure provides a method () comprising: obtaining (), at the network node (), information relating to a plurality of signals received or transmitted using a set of receiving beams or a set of transmitting beams of the network node (), each individual beam of the set having a unique beam direction; determining a set of candidate beams for use by the network node () for synchronisation signal, SS, transmission or random access channel, RACH, detection; based on the obtained information, selecting one or more of the determined candidate beams; and using the selected one or more of the determined candidate beams for SS transmission or RACH detection by the network node ().

Beamforming for random access channel (RACH)

Embodiments herein include a method in a user equipment (UE) for transmitting uplink control information in time slots of a subframe over a radio channel to a radio base station. The uplink control information is comprised in a block of bits. The UE maps the block of bits to a sequence of complex valued modulation symbols. The UE block spreads the sequence across Discrete Fourier Transform Spread-Orthogonal Frequency Division Multiplexing (DFTS-OFDM) symbols. This is performed by applying a spreading sequence to the sequence of complex valued modulation symbols, to achieve a block spread sequence of complex valued modulation symbols. The UE further transforms the block-spread sequence, per DFTS-OFDM symbol. This is performed by applying a matrix that depends on a DFTS-OFDM symbol index and/or slot index to the block-spread sequence. The UE also transmits the block spread sequence, as transformed, over the radio channel to the radio base station.

Radio base station and user equipment and methods therein

Devices and methods for transmitting data on a radio channel comprise jointly encoding a preamble format with a first random access configuration, thereby forming an extended random access configuration represented by a set of bits. The first random access configuration comprises a combination of a density value and a version index. Each preamble format is associated with a plurality of version indexes.

Methods and devices for communicating on a radio channel based on jointly encoding a preamble format with random access configuration

The present invention relates to methods and arrangements in a base station and a user equipment for determining an uplink transmission timing correction for communication in a telecommunication system in which aggregation of component carriers is applied. The base station receives a signal from the user equipment on an uplink (UL) component carrier and measures the arrival time of the signal. A timing correction of the UL transmission timing based on the arrival time of the signal is determined. Thereupon the base station determines for which of the uplink component carriers used by the user equipment the timing correction is valid. The timing correction and the validity information is sent to the user equipment. The user equipment adjusts the UL transmission timing for each UL component carrier the timing correction is valid for.

Methods and arrangements in a telecommunications network

The present solution ensures that the UEs are able to make use of all the available reference signals that can be used in a cell for performing UE measurements, estimations or demodulations. That is achieved by indicating on a downlink common or shared channel, the MIMO mode settings associated with a specific network node. The indicated MIMO mode settings explicitly or implicitly indicate available common reference signals and/or dedicated reference signals to be used for said UE measurements, estimations or demodulations, which implies that measurements, estimations or demodulations can be performed based on said received indication.

Method and apparatus for communicating to UE an indication of available RS, based on MIMO mode settings

The invention relates to devices and methods for transmitting data on a radio channel comprising to jointly encode a preamble format with a first random access configuration, forming an extended random access configuration. The extended random access configuration is then transmitted on the radio channel.

A mobile terminal camps in a first cell associated with a first reference signal with a first physical structure that relates to a first Time Division Duplex (TDD) allocation of sub-frames for uplink and downlink transmission. The first reference signal is carried by the downlink sub-frames. The mobile terminal detects a broadcast indication of a second physical structure for carrying a second reference signal that relates to a second allocation of sub-frames for uplink and downlink transmissions that differs from the first allocation. The downlink sub-frames according to the second allocation carry the second reference signal. The mobile terminal measures the second reference signal of a neighbor cell as carried by the second physical structure.

Information on reference signal structure for neighboring cell measurements

There is provided mechanisms for generating cell-specific signals using an antenna array with dual-polarized antenna elements. A method is performed by a network device. The method comprises obtaining antenna weights for two sector-specific signals, each sector-specific signal giving rise to a respective sector-specific radiation pattern. The method comprises generating a first cell-specific signal, the first cell-specific signal giving rise to a first cell-specific radiation pattern, wherein antenna weights for the first cell-specific signal are determined such that the radiation pattern matches both sector-specific radiation patterns. The method comprises generating a second cell-specific signal, the second cell-specific signal giving rise to a radiation pattern identical to the first cell-specific radiation pattern, wherein antenna weights for the second cell-specific signal are identical to the antenna weights for the first cell-specific signal except that the first cell-specific signal and the second cell-specific signal have mutually orthogonal polarization.

Cell-specific signal generation

Growing community of inventors

Bromma, Sweden

David Astely