公开(公告)号：WO2021160570A1

公开(公告)日：2021-08-19

申请号：PCT/EP2021/052993

申请日：2021-02-09

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： NILSSON, Magnus ,  JAKOBSSON, Peter ,  INGELHAG, Per ,  WALLIN, Sten ,  PLAHN, Joakim ,  ISBERG, Martin ,  CARLSSON, Torsten ,  SVENSSON, Peter ,  LJUNGBRO, Agneta ,  RENSTRÖM, Örjan ,  HAO, Dandan

IPC: H04B7/022 ,  H04B7/06 ,  H04B7/08

Abstract: In an example embodiment, a system comprises a chain of serially coupled nodes, including a central processing node (CPN) and one or more radio communications nodes (RCNs). The CPN couples to a first RCN in the chain via a dielectric waveguide (DWG) link and any further RCNs in the chain are successively connected in serial fashion from the first RCN via further (DWG) links. The CPN generates outbound radio carrier signals that are waveguide-propagated in a downstream direction of the chain, for over-the-air (OTA) by targeted ones of the RCNs, while radio carrier signals received via OTA reception by respective ones of the RCNs are waveguide propagated as inbound radio signals in an upstream direction of the chain, for processing by the CPN. Advantages from the contemplated system include greatly simplified implementation of the RCNs, with lower cost and power consumption. Further, strategic placement of failover CPNs and DWG links provide for continued operation in the face of CPN or DWG link failures.

公开(公告)号：WO2021213679A1

公开(公告)日：2021-10-28

申请号：PCT/EP2020/061527

申请日：2020-04-24

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： NILSSON, Magnus ,  CARLSSON, Torsten ,  CELANDER, Jan ,  ISBERG, Martin ,  JAKOBSSON, Peter ,  SANDGREN, Magnus

IPC: H04B7/024 ,  H04B7/06 ,  H04L1/18

Abstract: A wireless system comprises a controlling node and two or more antenna processing nodes coupled to the controlling node but separated from each other. The controlling node sends (720) a command to a first one of the two or more antenna processing nodes, instructing the first one of the two or more antenna processing nodes to transmit data to a wireless device. This may be preceded by selecting (715) the first one of the antenna processing nodes based on an estimated signal quality metric corresponding to the wireless device for each antenna processing node. In response to a determination by the controlling node that the wireless device has not successfully decoded the data, the controlling node sends (730) a command to a second one of the two or more antenna processing nodes, instructing the second one of the antenna processing nodes to transmit the data to the wireless device.

公开(公告)号：WO2021213678A1

公开(公告)日：2021-10-28

申请号：PCT/EP2020/061524

申请日：2020-04-24

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： NILSSON, Magnus ,  CARLSSON, Torsten ,  CELANDER, Jan ,  ISBERG, Martin ,  JAKOBSSON, Peter ,  SANDGREN, Magnus

IPC: H04B7/024

Abstract: A wireless system comprises a controlling node and multiple antenna processing nodes coupled to the controlling node but separated from each other. The controlling node receives (720) first soft bit information from a first antenna processing node, the first soft bit information corresponding to reception of a wireless transmission. Responsive to determining that it cannot decode transmitted bits using the first soft bit information, the controlling node requests (730) and receives (740) second soft bit information from a second antenna processing node, the second soft bit information also corresponding to the first wireless transmission from the wireless device and having been buffered by the second antenna processing node. The controlling node decodes (750) bits from the first wireless transmission using both the first and second soft bit information. The controlling node may then signal the antenna processing nodes that they can discard buffered information for the wireless transmission.

公开(公告)号：WO2022139641A1

公开(公告)日：2022-06-30

申请号：PCT/SE2020/051256

申请日：2020-12-22

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： WERNER, Karl ,  CARLSSON, Torsten ,  NILSSON, Magnus

IPC: H04B17/309 ,  H04B7/0452 ,  H04B17/391 ,  H04L25/02

Abstract: Disclosed is a method and a first transceiver (120) of a wireless communication network (100), for handling reference signals. The first transceiver (120) comprises M antenna branches (124, 125, 126), each antenna branch comprising an antenna element (121, 122, 123). The method comprises receiving, from a second transceiver (110), at the antenna elements of each of the M antenna branches (124, 125, 126) and in time domain, an OFDM modulated wideband reference signal comprising an OFDM reference signal symbol mapped to every K subcarrier frequency of at least a subset of a carrier frequency bandwidth, and, at each of the M antenna branches (124, 125, 126), sampling the received wideband reference signal using N samples per OFDM symbol. The method further comprises, for each of the M antenna branches (124, 125, 126), accumulating the received, sampled wideband reference signal over at least two repetition blocks, each block having a length of N/K samples, to obtain a condensed signal with the length N/K samples, based on information on start times of the at least two repetition blocks, and, for each of the M antenna branches (124, 125, 126), conveying the condensed signal over an interface (129) to an aggregate unit (128) for use in estimating a wireless communication channel between the second transceiver (110) and the first transceiver (120).

公开(公告)号：WO2022037784A1

公开(公告)日：2022-02-24

申请号：PCT/EP2020/073387

申请日：2020-08-20

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： NILSSON, Magnus ,  CARLSSON, Torsten ,  CELANDER, Jan ,  ISBERG, Martin ,  JAKOBSSON, Peter ,  SANDGREN, Magnus

IPC: H04B7/024 ,  H04B7/08

Abstract: A first antenna processing node receives (710) one or more wireless transmissions from a wireless device and obtains first symbol values from the one or more wireless transmissions. The first antenna processing node receives (720) second symbol values from a second antenna processing node, the second symbol values corresponding to the one or more wireless transmissions as received at the second antenna processing node, and calculates (730) a first weight parameter based on at least a subset of the first symbol values and a corresponding subset of the second symbol values. The first antenna processing node calculates (740) third symbol values by computing a weighted sum of first symbol values and corresponding ones of the second symbol values, using the first weight parameter, and sends (750) the third symbol values to a third antenna processing node or to a controlling node. This combining of symbol values may approximate maximum ratio combining, MRC.

公开(公告)号：WO2021219224A1

公开(公告)日：2021-11-04

申请号：PCT/EP2020/062042

申请日：2020-04-30

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： NILSSON, Magnus ,  CARLSSON, Torsten ,  CELANDER, Jan ,  ISBERG, Martin ,  JAKOBSSON, Peter ,  SANDGREN, Magnus

IPC: H04B7/024 ,  H04W88/08 ,  H04B7/06 ,  H04B7/26

Abstract: A distributed wireless system comprises controlling node and two or more antenna processing nodes communicatively coupled to the controlling node but spatially separated from each other and from the controlling node. The controlling node sends commands to and exchanges data with a first subset of the antenna processing nodes, using a first twisted-pair lane of a physical layer interface having four twisted-pair lanes, and sends commands to and exchanging data with a second subset of the antenna processing nodes, using a second twisted-pair lane. In some embodiments, the controlling node also uses a third twisted-pair lane for communicating with the first subset, while using the fourth twisted-pair lane for communicating with the second subset. Corresponding antenna processing nodes terminate one or two twisted-pair lanes in a direction towards the controlling node, while terminating one or two twisted-pair lanes towards one or more antenna processing nodes further from the controlling node.

公开(公告)号：WO2019219180A9

公开(公告)日：2019-11-21

申请号：PCT/EP2018/062636

申请日：2018-05-16

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： CARLSSON, Torsten ,  WIGREN, Torbjörn ,  SAHLIN, Henrik

IPC: H04L5/00 ,  H04L7/04 ,  H04L27/26 ,  H04W74/08 ,  H04B7/06

Abstract: A base station for detecting a Physical Random Access Channel (PRACH) transmission from a User Equipment device (UE) comprises a radio device and at least one additional device. The radio device comprises narrowband receivers respectively coupled to antenna elements of an antenna array. Each narrowband receiver is configured to receive a signal from a respective antenna element and process the signal to provide received symbols for a PRACH received via the respective antenna element. The radio device also comprises accumulation circuitry configured to, for each antenna element, accumulate a subset of the received symbols for the PRACH received via the antenna element to output a first averaged symbol for the PRACH received via the antenna element. The at least one additional device is configured to receive, from the radio device, the first averaged symbols and process the first averaged symbols to perform PRACH detection for one or more receive beams.

公开(公告)号：WO2017028925A1

公开(公告)日：2017-02-23

申请号：PCT/EP2015/069147

申请日：2015-08-20

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： CARLSSON, Torsten ,  CARLSSON, Anders ,  ÖSTBERG, Christer ,  REIAL, Andres

IPC: H04B7/04 ,  H04B7/08 ,  H04B7/10

CPC classification number: H04B7/022 ,  H04B7/0842 ,  H04B7/10

Abstract: A receiver (10) featuring a distributed antenna combining system performs two stages of antenna combining. An antenna array (30) receives (102) L streams, or information flows, from UEs (20), and outputs antenna signals on N antenna ports. N parallel radio receivers (40) frequency convert (104) the N received signals to baseband. A first antenna combining circuit (50) applies (106) a relatively low-complexity form of antenna combining (e.g., MRC) to the N radio signals to generate K streams of virtual information. A second antenna combining circuit (60) applies (108) a relative high-complexity form of antenna combining (e.g., IRC) to the K virtual streams to generate L information streams. In one embodiment, antenna elements may have different polarization directions, and the first antenna combining circuit (50) generates two, differently-polarized virtual information streams for each UE (20) stream.

Abstract translation: 具有分布式天线组合系统的接收机（10）执行天线组合的两个阶段。 天线阵列（30）从UE（20）接收（102）L个流或信息流，并在N个天线端口上输出天线信号。 N个并行无线电接收机（40）将N个接收到的信号频率转换（104）到基带。 第一天线组合电路（50）将（106）相对低复杂度的天线组合（例如，MRC）应用于N个无线电信号以产生K个虚拟信息流。 第二天线组合电路（60）将（108）天线组合（例如，IRC）的相对高复杂度形式（108）应用于K个虚拟流以产生L个信息流。 在一个实施例中，天线元件可以具有不同的偏振方向，并且第一天线组合电路（50）为每个UE（20）流生成两个不同极化的虚拟信息流。

公开(公告)号：WO2022063409A1

公开(公告)日：2022-03-31

申请号：PCT/EP2020/076867

申请日：2020-09-25

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： CARLSSON, Torsten ,  WERNER, Karl

IPC: H04B7/06

Abstract: Radio channel estimation in a radio node is provided. The radio node is configured to receive a number of wideband reference symbols corresponding to a wideband radio channel having a wideband bandwidth and convert the wideband reference symbols into a number of wideband taps each having a complex value and associated with a respective beam direction and a respective tap delay. The radio node dynamically determines a wideband power threshold based on channel information related to the wideband channel. Accordingly, the radio node determines a subset of the wideband taps based on the wideband power threshold and generates a channel estimate for the wideband radio channel based on the subset of wideband taps. As a result, the radio node may create a more accurate channel estimation across the wider channel bandwidth over a large span of SNR conditions.

公开(公告)号：WO2021223892A1

公开(公告)日：2021-11-11

申请号：PCT/EP2020/062938

申请日：2020-05-08

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： NILSSON, Magnus ,  CARLSSON, Torsten ,  JAKOBSSON, Peter ,  RAO, Jing ,  KARLSSON, Jonas ,  WIGREN, Torbjörn ,  GÖRANSSON, Bo

IPC: H04B1/00 ,  H04B7/08 ,  H04W74/08

Abstract: An Advanced Antenna System (AAS) receiver and related methods are provided. According to one aspect an AAS receiver comprises a digital processing block of a Radio Frequency Integrated Circuit (RFIC). The digital processing block comprises an interface for communicating with a Central Unit (CU), and a plurality of Antenna Signal Processing Blocks (ASPBs), each receiving a digitized receive signal from a respective antenna element of an antenna array. Each ASPB comprises one or more receivers, each of which receives the signal from the respective antenna element, processes the received signal, and beamforms the processed signal to produce one or more data streams to be sent to the CU. Each ASPB also includes a narrowband receiver that processes an input signal (either the signal received from the respective antenna element or that signal after processing) to create a narrowband signal that is provided to the CU directly, without beamforming.