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1. 发明申请

WO2017204704A1 METHOD, DECODER AND ENCODER FOR HANDLING A BIT STREAM FOR TRANSMISSION OVER A TRANSMISSION LINK BETWEEN A REMOTE UNIT AND A BASE UNIT OF A BASE STATION SYSTEM 审中-公开
标题翻译：用于在远程单元与基站系统的基站单元之间的传输链路上处理用于传输的位流的方法，解码器和编码器
公开(公告)号：WO2017204704A1
公开(公告)日：2017-11-30
申请号：PCT/SE2016/050480
申请日：2016-05-24
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , ERICSSON TELECOMUNICACOES S.A.
发明人： LU, Chenguang , BERG, Miguel , HÖST, Stefan , TROJER, Elmar , KLAUTAU, Aldebaro , RAMALHO, Leonardo , FONSECA, Nilma
IPC分类号： H04L27/26 , H03M7/30 , H04L27/36
摘要： Described is a method performed by an encoder of a base station system (100) of a wireless communication network, for handling a bit stream for transmission over a transmission link (165) between a remote unit (160) and a base unit (170) of the base station system. The remote unit is arranged to transmit wireless signals to and receive from mobile stations (180). The bit stream comprises a first OFDM symbol and a second OFDM symbol, each OFDM symbol comprising a number of consecutive IQ samples. The method comprises, for a first number of the IQ samples situated at a boundary between the first and the second OFDM symbol, transmitting, over the transmission link to a decoder of the base station system, the first number of IQ samples having a representation spanning a first amplitude range. The method further comprises, for a second number of IQ samples of the second OFDM symbol, following the first number of IQ samples, converting, using a predictive filter, individual of the second number of IQ samples to IQ prediction errors, where the IQ prediction errors have a representation spanning a second amplitude range that is smaller than the first amplitude range, and transmitting the IQ prediction errors over the transmission link to the decoder.
摘要翻译：描述了一种由无线通信网络的基站系统（100）的编码器执行的用于处理比特流以通过远程单元（160）之间的传输链路（165）传输的比特流的方法，）和基站系统的基站单元（170）。远程单元被设置为向移动站（180）发送无线信号并从移动站（180）接收无线信号。比特流包括第一OFDM符号和第二OFDM符号，每个OFDM符号包括多个连续的IQ样本。对于位于第一和第二OFDM符号之间的边界处的第一数量的IQ采样，该方法包括通过传输链路向基站系统的解码器发送第一数量的IQ采样，该第一数量的IQ采样具有跨越第一幅度范围。该方法进一步包括：对于第二OFDM符号的第二数目的IQ样本，在第一数量的IQ样本之后，使用预测滤波器将第二数量的IQ样本中的个体转换为IQ预测误差，其中IQ预测误差具有跨越小于第一幅度范围的第二幅度范围的表示，并且通过传输链路将IQ预测误差发送到解码器。

2. 发明申请

WO2023046462A1 BEAMSPACE COMPRESSION IN AN OPEN-RADIO ACCESS NETWORK 审中-公开
公开(公告)号：WO2023046462A1
公开(公告)日：2023-03-30
申请号：PCT/EP2022/074734
申请日：2022-09-06
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： HUANG, Yezi , LU, Chenguang , BERG, Miguel , POHLMAN, Björn
IPC分类号： H04B7/06 , H04B7/022
摘要： A first network entity of a communications network can generate compressed beamforming weights ("BFWs") based on a transformation configuration. The transformation configuration can be based on one or more parameters of an antenna array associated with a second network entity of the communications network. The one or more parameters can include a parameter that is separate from a total number of antenna ports in the antenna array. The first network entity can further transmit an indication of the compressed BFWs to the second network entity via a fronthaul between the first network entity and the second network entity.

3. 发明申请

WO2023043348A1 DETERMINING A RELATION BETWEEN TIME-DOMAIN SIGNALS BASED ON FREQUENCY DOMAIN COEFFICIENTS 审中-公开
公开(公告)号：WO2023043348A1
公开(公告)日：2023-03-23
申请号：PCT/SE2021/050897
申请日：2021-09-17
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： BERG, Miguel , LU, Chenguang , BÖRJESSON, Per Ola
IPC分类号： H04B7/08 , G01S5/00
摘要： It is provided a method for determining a relation between a first time-domain signal and a second time-domain signal received from a single source. The time domain signals are respectively processed with a Fourier-related transform to indirectly or directly provide respective first and second frequency-domain signals being made up of frames. Only one part from the Fourier-related transform is included. A first part is the part that is included and a second part is the other part. The method comprises the steps of:receiving the frequency-domain signals; determining a first part cross-correlation by cross-correlating corresponding frames in the first frequency-domain signal and the second frequency-domain signal, for the first part; and determining a second part cross-correlation by cross-correlating non-corresponding frames in the first frequency-domain signal and the second frequency-domain signal, for the second part.

4. 发明申请

WO2023041440A1 EVALUATING A TIME-DOMAIN SIGNAL 审中-公开
公开(公告)号：WO2023041440A1
公开(公告)日：2023-03-23
申请号：PCT/EP2022/075136
申请日：2022-09-09
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： BERG, Miguel , LU, Chenguang , BÖRJESSON, Per Ola
IPC分类号： H04B7/08 , G01S5/00
摘要： It is provided a method for evaluating a first time-domain signal received from a single source, wherein the time domain signal is processed with a Fourier-related transform with overlapping input frames to provide a first frequency-domain signal being made up of frames of coefficients, wherein only one part is included in the first frequency-domain signal, wherein a first part is the part, real or imaginary, that is included in the frequency-domain signal and a second part is the part, real or imaginary, that is not included in the frequency-domain signal. The method is performed by a signal evaluator. The method comprises: receiving the first frequency-domain signal; obtaining a reference frequency-domain signal; and determining a first cross-correlation between the received first frequency-domain signal and the reference frequency-domain signal by cross-correlating the received first frequency-domain signal and the reference frequency-domain signal.

5. 发明申请

WO2023033691A1 AN EFFICIENT LOWER-LAYER SPLIT OPTION ENABLING CENTRALIZED BEAMFORMING FOR CASCADED DISTRIBUTED-MULTIPLE-INPUT MULTIPLE-OUTPUT 审中-公开
公开(公告)号：WO2023033691A1
公开(公告)日：2023-03-09
申请号：PCT/SE2021/050851
申请日：2021-09-06
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： HUANG, Yezi , LU, Chenguang , BERG, Miguel
IPC分类号： H04B7/024 , H04B7/0452 , H04B7/0456 , H04B7/08 , H04W88/08
摘要： A network entity can be in a communications network that includes a plurality of network nodes communicatively coupled to the network entity via a cascaded topology. The network entity can transmit scheduling information to a first network node of the plurality of network nodes. The scheduling information can indicate user layers to be used for communication with a communication device. The network entity can further receive an indication of an intermediate beamforming weight from the first network node. The network entity can further determine a part of a frequency-domain beamforming weight based on the indication of the intermediate beamforming weight. The network entity can further communicate with the communication device via the first network node using the part of the frequency-domain beamforming weight.

6. 发明申请

WO2022177481A1 ENCODING AND DECODING COMPLEX DATA 审中-公开
公开(公告)号：WO2022177481A1
公开(公告)日：2022-08-25
申请号：PCT/SE2021/050138
申请日：2021-02-18
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： BERG, Miguel , BÖRJESSON, Per Ola , LU, Chenguang
IPC分类号： G10L19/022 , H03M7/30 , H04L27/34 , G06F17/14 , H04W88/08
摘要： It is provided a method for encoding complex data. The method comprises 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 comprising 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 comprises determining a time frame that overlaps in time with a preceding time frame.

7. 发明申请

WO2019098897A1 METHODS, SYSTEMS AND UNITS OF A DISTRIBUTED BASE STATON SYSTEM FOR HANDLING OF DOWNLINK COMMUNICATION 审中-公开
公开(公告)号：WO2019098897A1
公开(公告)日：2019-05-23
申请号：PCT/SE2017/051149
申请日：2017-11-20
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： TROJER, Elmar , LU, Chenguang , BERG, Miguel , HUANG, Yezi
IPC分类号： H04B7/024 , H04B7/0456 , H04B7/04 , H04B7/06 , H04W88/08
CPC分类号： H04B7/024 , H04B7/0456 , H04B7/0478 , H04B7/0617 , H04W88/085
摘要： A method is disclosed performed by a RRU (120) of a distributed base station system (100), which further comprising a BBU, (110) connected to the RRU. The RRU (120) is arranged to wirelessly communicate with at least one UE (131, 132, 133). The method comprises determining a downlink channel estimate from received uplink signals and determining a first part of precoding coefficients to be used for precoding signals to be sent downlink to the at least one UE based on the determined downlink channel estimate. The method further comprises receiving a second part of the precoding coefficients from the BBU (110), and precoding downlink signals of data received from the BBU using the first and the second part of the precoding coefficients and sending the precoded downlink signals to the at least one UE (131, 132, 133) via the plurality of antennas.

8. 发明申请

WO2015002584A1 RADIO UNIT AND METHOD PERFORMED BY A RADIO UNIT OPERABLE IN A BASE STATION SYSTEM OF A WIRELESS COMMUNICATION NETWORK FOR REDUCING INTERFERENCE AT THE RADIO UNIT 审中-公开
标题翻译：无线电单元和无线电单元执行的方法在无线通信网络的基站系统中运行，以减少无线电单元的干扰
公开(公告)号：WO2015002584A1
公开(公告)日：2015-01-08
申请号：PCT/SE2013/050851
申请日：2013-07-03
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： ERIKSSON, Per-Erik , BERG, Miguel , LU, Chenguang , TROJER, Elmar
IPC分类号： H04W88/08
CPC分类号： H04B3/32 , H04B1/10 , H04B15/00 , H04W88/085
摘要： Disclosed is a method performed by a radio unit (10) operable in a base station system of a wireless communication network, for reducing interference at the RU. The base station system comprises a baseband unit (30) the radio unit (10) and a plurality of radio heads (21-26) wherein the radio unit is connected to the plurality of radio heads via a number of metallic conductors (40), and wherein a signal is to be communicated to the radio unit at a first frequency range over one of the number of metallic conductors from one of the plurality of radio heads. The method comprises: detecting (206) if there is any near end crosstalk, NEXT, at a receiver of the RU, the receiver being connected to the one of the number of metallic conductors,and, when NEXT is detected, triggering (210) the one of the plurality of RHs to send the signal to be communicated over the one of the number of metallic conductors at a second frequency range different from the first frequency range where a lower NEXT is expected than at the first frequency range. Disclosed are also a corresponding radio unit and a computer program.
摘要翻译：公开了一种在无线通信网络的基站系统中可操作的无线电单元（10）执行的方法，用于减少RU处的干扰。基站系统包括无线电单元（10）的基带单元（30）和多个无线电头（21-26），其中无线电单元经由多个金属导体（40）连接到多个无线电头，并且其中信号将在来自多个无线电头中的一个的多个金属导体中的一个上的第一频率范围上传送到无线电单元。该方法包括：检测（206）在RU的接收机处是否存在近端串扰NEXT，接收机连接到多个金属导体中的一个，并且当检测到NEXT时，触发（210）多个RH中的一个发送要在与期望较低NEXT的第一频率范围不同于在第一频率范围的第一频率范围的多个金属导体中的一个上传送的信号。还公开了相应的无线电单元和计算机程序。

9. 发明申请

WO2012018289A3 METHOD IN A COMMUNICATION SYSTEM 审中-公开
公开(公告)号：WO2012018289A3
公开(公告)日：2012-02-09
申请号：PCT/SE2010/050877
申请日：2010-08-05
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , LU, Chenguang , ERIKSSON, Per-Erik
发明人： LU, Chenguang , ERIKSSON, Per-Erik
IPC分类号： H04B3/32
摘要： Method and arrangement in a Vector Control Entity for efficient selection of which crosstalk to cancel when applying partial vectoring in a DSL communication system. The method comprises calculating a respective crosstalk effect indicator, CEI ij , for the crosstalk from each line j of a plurality J of lines in a vectoring group, to a plurality of tones S i of a line i in the vectoring group, based on the strength of the crosstalk from each line j to line i, and thus providing one CEl i -value, associated with the plurality S j of tones, per line j. The method further comprises allocating partial-vectoring resources to cancellation of crosstalk, based on the calculated CEIs. The arrangement is adapted to enable the performance of the above described method.

10. 发明申请

WO2022211690A1 METHODS, BASEBAND UNIT SYSTEM AND RADIO UNIT OF A DISTRIBUTED BASE STATION HAVING CASCADE-COUPLED RADIO UNITS 审中-公开
公开(公告)号：WO2022211690A1
公开(公告)日：2022-10-06
申请号：PCT/SE2021/050302
申请日：2021-04-01
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： HUANG, Yezi , LU, Chenguang , BERG, Miguel
IPC分类号： H04B7/024 , H04B7/0452 , H04B7/06 , H04W88/08
摘要： Disclosed is a method performed by a first radio unit, RU, (120) of a distributed base station system (100). The distributed base station system (100) further comprises a Baseband Unit, BBU, (110) connected to the first RU (120) over a fronthaul link (140) and a second RU (160) connected to the first RU (120) over an RU link (165). The method deals with diving the beamforming into a first part performed in the first RU (120) and a second part performed in the BBU (110). The first RU (120) determines first part of beamforming weights that it uses for performing the first part of the beamforming of uplink signals received at its antennas into intermediate signals. The first RU (120) further determines intermediate beamforming weights to be used for the second part of beamforming at the BBU (110). The first RU further receives over the RU link (165) from the second RU (160), intermediate signals determined by the second RU from first part of beamforming weights determined by the second RU and from uplink signals as received at the second RU, as well as intermediate beamforming weights determined by the second RU. The first RU combines its own intermediate signals with the intermediate signals received from the second RU and sends them to the BBU (110). The first RU (120) further combines its own intermediate beamforming weights with the intermediate beamforming weights received from the second RU and sends them to the BBU (110). The BBU then beamforms the received combined intermediate signals based on the received combined intermediate beamforming weights for estimating user-layer signals as sent as uplink signals by UEs (131, 132, 133).

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