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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

WO2022124956A1 PRECODING AND POWER ALLOCATION FOR ACCESS POINTS IN A CELL- FREE COMMUNICATION SYSTEM 审中-公开
公开(公告)号：WO2022124956A1
公开(公告)日：2022-06-16
申请号：PCT/SE2020/051199
申请日：2020-12-11
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BE, BF, BG, BH, BJ, BN, BW, BY, BZ, CA, CF, CG, CH, CI, CL, CM, CN, CO, CR, CU, CY, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GT, GW, HN, HR, HU, ID, IE, IL, IN, IR, IS, IT, JO, JP, KE, KG, KH, KM, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MX, MY, MZ, NA, NE, NG, NI, NL, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SI, SK, SL, SM, SN, ST, SV, SY, SZ, TD, TG, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW) , ERICSSON TELECOMUNICAÇÕES S.A. [BR]/[BR] (BR)
发明人： ALMEIDA, Igor , MEDEIROS, Eduardo , KLAUTAU, Aldebaro , RAMALHO, Leonardo , NAKAMURA, Andrey
IPC分类号： H04B7/0456 , H04B7/06 , H04W52/24 , H04W52/34
摘要： There is provided mechanisms for determining a precoder for APs in a cell-free communication system. A method is performed by a controller of the APs. The method comprises obtaining channel estimates of a radio propagation channel between the APs and user equipment served in the cell-free communication system. The method comprises determining a precoder for the APs. The precoder has a ZF precoding factor and a power allocation factor. The ZF precoding factor is determined from the channel estimates. The power allocation factor is determined by maximizing total transmission power for all user symbols to be transmitted to the user equipment, one user symbol per each user equipment. Transmission power of each of the APs is not larger than a power constraint. Transmission power for each of the user equipment is lower bounded by a scaled heuristic value. The method comprises initiating transmission of precoded user symbols from the APs towards the user equipment. The user symbols are precoded according to the determined precoder.

3. 发明申请

WO2019045607A1 METHODS, INTERMEDIATE RADIO UNITS AND RADIO HEADS OF BASE STATION SYSTEMS FOR TRANSMISSION OF ANTENNA CARRIERS 审中-公开
公开(公告)号：WO2019045607A1
公开(公告)日：2019-03-07
申请号：PCT/SE2017/050866
申请日：2017-08-31
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： TROJER, Elmar , BERG, Miguel , LU, Chenguang , ERIKSSON, Per-Erik , KLAUTAU, Aldebaro , TAKEDA, Marcos , RAMALHO, Leonardo
IPC分类号： H04W88/08 , H04B7/04 , H04W92/12
CPC分类号： H04B1/40 , H04B7/04 , H04W88/085 , H04W92/12
摘要： Disclosed is a method performed by an IRU (210) of a base station system (200), the base station system comprising the IRU (210), a BBU (230) connected to the IRU (210), and a first RH (221) connected to the IRU (210) via a packet data network (240). The first RH (221) is arranged for wireless transmission in RF of a plurality of antenna carriers to UEs (250). The method comprises receiving, from the BBU (230), a plurality of first digital representations of the plurality of antenna carriers of the first RH (221), each first digital representation representing one antenna carrier, the plurality of first digital representations being received in a baseband frequency range, frequency multiplexing the plurality of first digital representations of the plurality of antenna carriers into a second digital representation over a first bandwidth, and transmitting the second digital representation to the first RH (221).

4. 发明申请

WO2018106155A1 METHODS, ENCODER AND DECODER FOR HANDLING A DATA STREAM FOR TRANSMISSION BETWEEN A REMOTE UNIT AND A BASE UNIT OF A BASE STATION SYSTEM 审中-公开
公开(公告)号：WO2018106155A1
公开(公告)日：2018-06-14
申请号：PCT/SE2016/051212
申请日：2016-12-05
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , ERICSSON TELECOMUNICAÇÕES S.A.
发明人： KLAUTAU, Aldebaro , LU, Chenguang , RAMALHO, Leonardo , BERG, Miguel , BÖRJESSON, Per Ola , HÖST, Stefan
IPC分类号： H04L1/00
摘要： Described is a method performed by an encoder of a base station system (100) of a wireless communication network, for handling a data stream comprising a number of consecutive IQ samples for transmission over a transmission network (165) between a remote unit (160) and a base unit (170) of the base station system. The remote unit (160) is arranged to transmit wireless signals to and receive from mobile stations (180), each of the number of IQ samples comprising a first number of bits. The method comprises quantizing, by a quantizer, the IQ samples or IQ prediction errors of the IQ samples with a second number of bits, wherein an amplitude range of the quantizer for the second number of bits is variable and set based on an acceptable signal quality value, entropy encoding the quantized IQ samples or IQ prediction errors applying a first entropy encoding dictionary out of a plurality of entropy encoding dictionaries, based on the set amplitude range of the quantizer, and transmitting, to a decoder, the entropy encoded and quantized IQ samples or IQ prediction errors over the transmission network.

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