Telefonaktiebolaget Lm Ericsson (publ)

Miguel Berg

Chenguang Lu

Elmar Trojer

Per-Erik Eriksson

Daniel Cederholm

Per Ola Börjesson

Yezi Huang

Antoni Fertner

Jacob Österling

Roland A Smith

Eduardo Lins De Medeiros

Aldebaro Klautau

Jacob Kristian Osterling

Gunther Auer

Fredrik Lindqvist

Fredrik Huss

Johan Kölhi

Satyam Dwivedi

Jan Roxbergh

Tsao-Tsen Chen

Mattias Frenne

Fredrik Gunnarsson

Bo Hagerman

Niklas Wernersson

Ioanna Pappa

Johan Söder

Tomas Lagerqvist

Ulf Skärby

Zhao Wang

Roy Timo

Peter De Bruin

Thomas Magesacher

Jaume Rius I Riu

Johan Thorebäck

Klas Ericson

André Mendes Cavalcante

Rune Johansson

Igor Almeida

Leonardo Ramalho

Johan Zhang

Stefan Höst

Mike Skof

Ralf Bergqvist

Peter Pääkkönen

Marcos Takeda

Olof V Tidblad

Djamel Sadok

Albin Johansson

Jonathan Olsson

Tomas Andreason

Jonas Emanuel Rosenberg

Henrik Almeida

Sándor Albrecht

Keke Zu

Stefan Ström

Michael Petras

Nilma Fonseca

Lukas Sandström

Ramide Augusto Sales Dantas

Glauco Goncalves

Rodolpho Guedino De Siqueira

Rodrigo Perazzo Rabelo

Inigo Pinilla

Johan KÖHLI

Johan KÖLHI

Per Ola BÖRJESSON

Lu Chenguang

Ahsan Mahmood

Björn Pohlman

It is provided a method for encoding complex data. The method includes the steps of: obtaining an input signal made up of a series of numerically represented samples; determining a time frame of the input signal to process; applying a first window function on data in the time frame, resulting in first windowed data, wherein the first window function tapers sample magnitude towards the edges of the first window function; performing a windowed complex discrete Fourier-related transform on the first windowed data, resulting in frequency-domain data including a plurality of coefficients, keeping only the real part or the imaginary part of each coefficient; quantizing the frequency domain data resulting in quantized data; outputting the quantized data as encoded data; and repeating the method, wherein each subsequent iteration of the step of determining a time frame includes determining a time frame that overlaps in time with a preceding time frame.

Encoding and decoding complex data

A method performed by a network entity is provided. The method comprises obtaining information indicating uplink, UL, and downlink, DL, time periods in the packet-based fronthaul network occupied by Time-Division Duplex, TDD, radio transmissions transmitted and/or received by the one or more second fronthaul network units over its radio interface. The method further comprises scheduling packet-based synchronization messages between at least the one or more first fronthaul network units and the one or more second fronthaul network units over the packet-based fronthaul network based on the obtained information. A network entity is also provided, as well as, computer programs and carriers.

Network entity for synchronization over a packet-based fronthaul network

Disclosed is a method performed by a first radio unit, RU, of a distributed base station system. The distributed base station system further comprises a Baseband Unit, BBU, connected to the first RU over a fronthaul link and a second RU connected to the first RU over an RU link. The first RU determines first part of beamforming weights that it uses for performing a first part of the beamforming of uplink signals received at its antennas into intermediate signals. The first RU further determines intermediate beamforming weights to be used for a second part of beamforming at the BBU. The first RU further receives, from the second RU, intermediate signals and intermediate beamforming weights determined by the second RU. The first RU combines the intermediate signals and sends them to the BBU. The first RU further combines the intermediate beamforming weights and sends them to the BBU.

Methods, baseband unit system and radio unit of a distributed base station having cascade-coupled radio units

A method and transition device for enabling communication of data between a remote radio unit and a central baseband unit in a wireless network. When detecting a first interface configuration used by the remote radio unit and a second interface configuration used by the baseband unit, the transition device configures interface functions, based on the first and second interface configurations. The interface functions are selected from a set of predefined interface functions associated with different interface configurations. The transition device then establishes a data flow between the remote radio unit and the central baseband unit over the transition device, and performs conversion between the first interface configuration and the second interface configuration for data communicated in the data flow, using the selected interface functions.

Method and transition device for enabling communication of data in a wireless network

A first network node, a second network node and methods therein, for handling baseband processing of signals communicated with wireless devices in a wireless network. The first network node communicates a first type of signals with a first wireless device and performs a first part of baseband processing of the first type of signals using a non-GPP implemented processor. The first network node also communicates the first type of signals with the second network node for a second part of baseband processing of the first type of signals using a GPP implemented processor. The first network node further communicates a second type of signals with a second wireless device and performs both of said first and second parts of baseband processing of the second type of signals using the non-GPP implemented processor.

Methods and network nodes for handling baseband processing

A method, network node and customer premises equipment (CPE) and apparatus for 3Generation Partnership Project (3GPP) Fifth Generation (5G) hybrid fiber coax (HFC)-distributed antenna system (DAS) network with machine learning beam management are disclosed. According to one aspect, a method in a network node includes determining a set of beam weights for each CPE of the plurality of CPE, each set of beam weights being associated with a synchronization signal block, SSB, beam index, each SSB index being associated with a window of time for communication between the network node and CPE associated with a beam ID; and transmitting an SSB index to CPE associated with the beam ID to indicate to the CPE the window of time for communication between the network node and the CPE.

Hybrid fiber cable distributed antenna system (HFC-DAS) network with machine learning beam

Disclosed is a method performed by a BBU system of a wireless communication network, comprising a distributed base station system (), which comprises a BBU () and an RRU () connected over a fronthaul link (). The method comprises determining first and second parts of beamforming weights based on a determined downlink channel estimate, and compressing the second part of the beamforming weights. The first part of the beamforming weights is determined for performing interference cancellation between user-layer signals, and the second part is determined for expanding the user-layer signals to antenna signals. The BBU then sends the first part and the compressed second part of the beamforming weights to the RRU, as well as the user-layer signals, over the fronthaul link (). The RRU () then beamforms the user-layer signals according to the first and the second parts of the beamforming weights before sending the signals to a number of UEs ().

Methods, distributed base station system, remote radio unit and base band unit system for handling downlink signals

A method performed by a distributed base station system of a wireless communication network. The distributed base station system comprises a base band unit (BBU) and a remote radio unit (RRU) connected to each other over a fronthaul link. The method comprises receiving uplink signals at N antennas of the RRU from a number of user equipment (UEs) connected to the RRU. The BBU determines first beamforming weights based on a first reference signal that is has received from the UEs and sends the first beamforming weights to the RRU. The RRU then determines intermediate signals from the first beamforming weights and the uplink signals and sends the intermediate signals to the BBU. The BBU then determines second beamforming weights from a second reference signal it has received from the RRU. Then, the BBU determines an output signal based on the intermediate signal and the second beamforming weights.

Methods, distributed base station system, remote radio unit and base band unit system for handling uplink signals

Disclosed is a method performed by a RRU of a distributed base station system of a wireless communication network, the RRU being connected to a BBU over a fronthaul link, the RRU being connected to N antennas. The method comprises obtaining uplink signals as received at the antennas from UEs wirelessly connected to the RRU, and obtaining a channel estimation matrix of wireless communication channels between UEs and the antennas. The method further comprises determining an error estimation matrix based on the channel estimation matrix, and on received reference signals y, the received reference signals having L symbols, L being smaller than N, determining intermediate signals, based on the uplink signals, the channel estimation matrix and the error estimation matrix, and sending to the BBU over the fronthaul link, the determined intermediate signals.

Methods, remote radio units and base band units of a distributed base station system for handling uplink signals

A method, network node and customer premises equipment for pre-equalization using beamforming functionality are disclosed. According to one aspect, a method in a network node includes estimating an uplink channel of a hybrid fiber cable network using references signals received from consumer premises equipment, determining a downlink channel using an inverse of the uplink channel estimate, mapping a downlink signal to a plurality of layer-specific signals, and applying beamforming weights to the layer-specific signals to produce layer-specific downlink signals, and summing the layer-specific downlink signals to produce a frequency-compensated downlink signal for transmission over the hybrid fiber cable network.

Pre-equalization using beamforming functionality

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

There is provided mechanisms for processing uplink signals. A method is performed by a RRU (). The method comprises obtaining uplink signals (S) as received from wireless devices at antenna elements of an antenna array of the RRU (), each wireless device being associated with its own at least one user layer. The method comprises capturing (S) energy per user layer by combining the received uplink signals from the antenna array for each user layer into combined signals, resulting in one combined signal per user layer. The combining for each individual user layer is based on channel coefficients of the wireless device associated with said each individual user layer. The method comprises providing (S) the combined signals to a BBU ().

Methods and devices for processing uplink signals

Disclosed is a method performed by a first unit of a base station system of a wireless communication network for handling a signal for transmission over a fronthaul link between the first unit and a second unit of the base station system. The base station system includes a base unit and a remote unit. The method includes receiving the signal having at least one complex value, each consisting of two subparts, each being represented by a first number of bits, and transmitting the signal over the fronthaul link to the second unit, wherein at least two subparts are represented in a subgroup, the subgroup being a binary codeword having an integer number of bits that is a multiple of a second non-integer number of bits allocated per subpart, the second non-integer number of bits being fewer than the first number of bits.

Methods and units of a base station system for handling a signal for transmission over a fronthaul link between the units

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Upplands Väsby, Sweden

Miguel Berg