China Academy of Telecommunications Technology

Samsung Electronics Co., Ltd.

Other

Datang Mobile Communications Equipment Co., Ltd.

Ranran Zhang

Qiubin Gao

Meifang Jing

Rakesh Tamrakar

Xiaohui Yang

Yan Li

Ying Peng

Zhigang Wang

Hao Ni

Deshan Miao

Xin Su

Guojun Xiao

Qixin Huang

Hui Li

Ying Wang

Xueming Pan

Rui Zhao

Shaohui Sun

Yi Zhao

Wenhong Chen

Guangyu Sun

Zhichun Shen

Di Zhang

Ying Li

Chen Chen

Jing Zhu

Tong Zhou

Deshan Miu

Huiyang Wang

Chanjuan Wei

Ying Zhu

Gaishi La

Jiangbo Guo

Chuping Dai

Honghong Li

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Specifically, the present disclosure relates to an O-RAN based network system.

Method and device for O-RAN-based performance optimization and configuration

A method and apparatus for supporting a multiple-input multiple-output (MIMO) by a service management and orchestration (SMO) entity in a communication system using an open radio access network (O-RAN) includes receiving, from a first entity, first data, the first entity including at least one of an O-RAN centralized unit (O-CU) and an O-RAN distributed unit (O-DU), the first data including MIMO related information collected from the first entity, determining, based on the first data, a configuration for applying at least one of a single-user-multiple-input-multiple-output (SU-MIMO) and a multi-user-multiple-input-multiple-output (MU-MIMO), and transmitting, to a second entity that controls the first entity in the O-RAN, information on the configuration.

Method and device of communication in a communication system using an open radio access network

A method for switching transmission methods in a multiple input multiple output (MIMO) system may include: receiving scenario identification related data from a user equipment (UE) in a current transmission method; determining a target transmission method of the UE from at least two predefined transmission methods based on the scenario identification related data; and switching the current transmission method of the UE to the target transmission method.

Method and device for switching transmission methods in massive MIMO system

A method performed by a terminal in a wireless communication system, including receiving, from a base station, a physical downlink control channel (PDCCH); predicting aggregation level information including information about an aggregation level of a control channel element (CCE) in which the PDCCH is received based on an aggregation level prediction model; determining a detection order for detecting the PDCCH based on the aggregation level information; and etecting the PDCCH based on the determined detection order.

Method and apparatus for detecting physical downlink control channel based on predicted information

An apparatus for beam configuration in a wireless communication system, including a transceiver; and at least one processor connected with the transceiver and configured to: form at least one beam cluster from beams of a base station; determine a configuration of the at least one beam cluster; and configure the beams in the at least one beam cluster according to the determined configuration

Method and apparatus for beam configuration in wireless communication system

The present application provide a reference signal transmitting method, including: notifying a User Equipment (UE) of a grid index and a reference signal port index of the UE, wherein a coverage area of a base station is divided into grids, the grid index of the UE is an index of a grid where the UE is located; generating a reference signal based on the grid index; and transmitting the reference signal on corresponding time-frequency resources based on the grid index and the reference signal port index. The present application further provides a corresponding reference signal transmitting apparatus, and a scheduling method and apparatus. According to the technical solution provided by the present application, it is possible to increase the number of ports that the system can support at the same time with low reference resource overhead, and to ensure that the interference of the reference signal is controllable and eliminable, thereby ensuring transmission reliability.

Method and apparatus for transmitting and receiving reference signal and for scheduling

Embodiments of the present disclosure provide reference signal transmitting and receiving methods and devices in an active antenna system. Port virtualization to a transmit antennas may be implemented for multiple cell-specific reference signal (CRS) antenna ports and applying different vertical beamforming vectors to implement port virtualization for the different CRS antenna ports. The User Equipment (UE) reports the maximum RSRP/RSRQ value measured based on multiple CRS ports, or the UE simultaneously reports multiple RSRP/RSRQ values and the information of the multiple CRS antenna ports. Therefore, the coverage problem of the CRS signal and Physical Broadcast Channel (PBCH)/Physical Downlink Control Channel (PDCCH)/Physical Downlink Shared Channel (PDSCH) demodulated based on CRS and the problem of measurement for Radio Resource Management (RRM) in the active antenna system may be avoided. Specifically, the following problems may be solved. 1) Coverage differences between CRS and PBCH/PDCCH/PDSCH demodulated based on CRS transmission and Enhanced PDCCH (E-PDCCH)/PDSCH signal transmission, which is measured based on the CSI-RS or demodulated based on the DMRS may be reduced or avoided. 2) The cell association problem due to the different vertical beamforming technologies adopted by the CSI-RS or DMRS and by the CRS may be avoided. 3) Deep spatial fading state may be avoided for CRS reception and PBCH/PDCCH/PDSCH demodulated based on the CRS.

Method and apparatus for reference signal transmitting and receiving in active antenna systems

The present invention relates to the field of communications, and provides a method and a device for enhanced-physical downlink control channel (E-PDCCH) transmission and blind detection. The method is: a network side carrying out corresponding E-PDCCH transmission resource configuration for allocation of each sub-frame; and a terminal respectively adopting different modes to perform E-PDCCH blind detection in each frame, so that better link adaptation of the E-PDCCH transmission can be implemented. Therefore, the balance of E-PDCCH transmission in the sub-frames is ensured, the effect of E-PDCCH blind detection of the terminal is further improved, and the E-PDCCH demodulation performance is further promoted.

Method and device for E-PDCCH transmission and blind detection

Disclosed are a multipoint channel state information reporting method and device. The technical solution of the embodiments of the present invention can be applied to configure a corresponding reporting mode for a reference signal resource pair composed of a channel sounding reference signal resource and an interference sounding reference signal resource which are allocated to a terminal device or configure a plurality of channel state information reporting configurations containing corresponding reporting modes, and allocate to each channel state information reporting configuration a reference signal resource pair composed of a channel sounding reference signal resource and an interference sounding reference signal resource; then, the terminal device report channel state information about corresponding reference signal resource pairs according to corresponding report modes, thereby achieving the purpose that the terminal device reports the channel state information for the one or more transmission points on one or more interference assumptions.

Multipoint channel state information reporting method and device

An information transmission method and equipment based on CoMP transmission are described. A user equipment determines a main transmission point. The user equipment determines RANK information of the main transmission point as well as channel state information corresponding to the RANK information. The user equipment sends the RANK information of the main transmission point and the channel state information to a network side equipment. The UE reports channel state information of limited RANK of every transmission point, channel state information of unlimited RANK of the main transmission point, and relative phase information between the transmission points, etc., to the network side equipment.

Method and equipment for information transmission based on coordinated multiple point transmission

Disclosed is a method for transmitting channel state information, for realizing the transmission of channel information which supports CoMP transmission. The method includes: a terminal receiving from a base station control signaling which indicates to the terminal to perform channel information feedback, the control signaling including indication information about a plurality of CSI-RS resources for performing aggregation feedback; the terminal obtaining the plurality of CSI-RS resources based on the indication information to perform channel estimation and constructing a channel matrix according to a PDSCH transmission solution over a preset CSI reference resource, the correlation between the signal over the plurality of CSI-RS resources and the signal of a UERS port and the constructed channel matrix and transmitting the CSI to the base station. Also disclosed is a device for implementing the method.

Method and device for transmitting channel state information

The present disclosure provides a method and an apparatus for determining number of ePDCCH resource units. The method includes: determining number of symbols occupied by PDCCH, number of CRS ports, number of DMRS ports and CSI-RS configuration in a subframe; and determining resources available for transmitting an ePDCCH in PDSCH area of the subframe according to the number of symbols occupied by the PDCCH, the number of CRS ports, the number of DMRS ports and the CSI-RS configuration.

Method and device for determining ePDCCH resources

An embodiment of the present invention relates to the technical field of wireless communications, in particular to an aerial calibration method, system and device. In the prior art, an air interface calibration method involving a user equipment (UE) requires the UE to feed back a channel coefficient, and a channel coefficient direct quantization method occupies a great deal of uplink overhead and reduces system efficiency. The present invention solves the above problem. The method in the embodiment of the present invention comprises: the UE measures a downlink channel and determines a downlink channel matrix; the UE determines a first weighting matrix for aerial calibration according to the downlink channel matrix; the UE notifies a network side of the determined first weighting matrix. In the embodiment of the present invention, a UE decomposes the characteristic value of the downlink channel matrix, or reports the identifier corresponding to the first weighting matrix to the network side device, thus reducing the occupied uplink overhead and improving system efficiency.

Antenna calibration method, system and apparatus

Embodiments of the present invention disclose an information transmission method and equipment based on CoMP transmission. In the method, a user equipment determines a main transmission point. The user equipment determines RANK information of the main transmission point as well as channel state information corresponding to the RANK information. The user equipment sends the RANK information of the main transmission point and the channel state information to a network side equipment. In the embodiments of the present invention, the UE reports channel state information of limited RANK of every transmission point, channel state information of unlimited RANK of the main transmission point, and relative phase information between the transmission points, etc., to the network side equipment, thereby helping the network side to better implement flexible selection and dynamic switchover of transmission schemes. Moreover, it does not notably increase feedback expenses for the UE.

The present invention relates to the field of communications. Disclosed are a CoMP transmission feedback method, device and system, the method comprising: determining an inter-mode reference relationship between at least two configured modes according to configuration information transmitted by a base station (s); at each feedback instance. determining the parameter in the current mode via the parameter in a reference mode and according to the reference relationship between modes (s); and feeding back the channel state information containing the parameter in the current mode according to the configuration of the current mode (s). The present invention realizes the sharing of pre-coding matrix indicator/rank indicator (PMI/RI) information among a plurality of channel quality indicators (CQIs) having different interference assumptions, and realizes the sharing of RI information among different transmission points, thus achieving a dependency relationship among a plurality of feedback modes.

Growing community of inventors

Beijing, China

Ranran Zhang