China Academy of Telecommunications Technology

Beijing University of Technology

Datang Mobile Communications Equipment Co., Ltd.

Nokia Solutions and Networks Oy

Fei Qin

Shaohui Sun

Tong An

Li Long Chen

Yuan He

Jiamin Liu

Yu Ding

Qiubin Gao

Xueming Pan

Guojun Xiao

Shaoli Kang

Jinbo Zhao

Zukang Shen

Deshan Miao

Wei Wu

Ying Peng

Hui Xu

Jing Fu

Shanzhi Chen

Ming Ai

Bin Jiao

Rui Zhou

Pei Chen

Ming Al

Yunjing Hou

Shuai Zhao

Fei He

Yanwei Dai

Guofeng Xia

Chengyan Liu

Wenhui Zhu

Fangli Xu

Haijing Hu

Ying Wang

Yali Zhao

Bin Ren

Rakesh Tamrakar

Li Liu

Guoqing Li

Hucheng Wang

Tamrakar Rakesh

Shiqiang Suo

Wei Bao

Jiayi Fang

Bo Hu

Haijun Zhou

Li Chen

Na Liu

Xiaoming Dai

Zhiqiu Zhu

Chun Luo

Lixiang Zhang

Xueheng Zheng

Yakun Zhang

Disclosed are a device and a method for measuring a fretting displacement in a power cycling of a press-pack insulated gate bipolar transistor (IGBT). The IGBT includes: a bracket; slide bars slidably mounted on the bracket and are arranged at least four along a circumferential direction of the bracket; sensors respectively slidably installed on the bracket and the slide bars; and a power cycling experiment device arranged inside the bracket.

Device and method for measuring fretting displacement in power cycle of press-pack IGBT

Disclosed is a pressure balancing clamp for a press-pack insulated gate bipolar transistor (IGBT) module. The pressure balancing clamp for a press-pack IGBT module includes a bracket, where the bracket is provided with two longitudinally arranged pressure equalizing plates in a sliding way; the pressure equalizing plates are connected through pressure sensors; the upper and lower ends inside the bracket are respectively connected with the pressure equalizing plates through hydraulic devices and a displacement compensation device; opposite surfaces of the two pressure equalizing plates are respectively provided with heat dissipation and confluence devices. The pressure sensors are in one-to-one correspondence with the hydraulic devices and are electrically connected. The hydraulic devices adjust the pressure according to the readings of the pressure sensors in corresponding directions, so that the pressure of the press-pack IGBT module is balanced.

Pressure balancing clamp for press-pack insulated gate bipolar transistor module

A method and apparatus for on-line measurement of the wafer thinning and grinding force, related to the field of ultra-precision machining of semiconductor wafer materials. The grinding force measuring apparatus comprises a semiconductor wafer, a worktable, a bearing table, a thin film pressure sensor, and a data processing and wireless transmission module. The grinding force measuring method includes sensor calibration based on the testing device and on-line measurement of grinding force. Using the grinding force measuring device and method provided by the invention, the grinding force in the semiconductor wafer grinding process can be monitored in real time, which is of great significance for semiconductor processing and reducing grinding damage. The invention also has the following characteristics: the sensor adopts a film pressure sensor, the response time is short, and the test precision is high; the data transmission adopts a wireless transmission design, thus the grinding force can be monitored in real time during the wafer and spindle rotation process and the risk of winding during wafer rotation can be avoided. The sensor adopts a distributed design, which can monitor the distribution of the grinding force along the wafer radial direction or crystal orientation.

Device and method for on-line measurement of wafer grinding force

The invention discloses a packaging structure and manufacturing method of a SiC MOSFET module, which is composed of SiC MOSFET chips, upper DBC substrate, lower DBC substrate, ceramic interposer, silicon oxide dielectric layer, nano silver pastes, redistribution layer, through-ceramic-hole conductive metals and power terminals. The SiC MOSFET chips are connected to the lower DBC substrate using nano silver pastes in the invention. Besides, some rectangular frames are made on the ceramic interposer, and the SiC MOSFET chips are embedded in the ceramic interposer by filling dielectric materials. The upper surfaces of the chips and the ceramic interposer are covered with a conductive metal redistribution layer, and the upper and lower surfaces of the ceramic interposer are interconnected with the upper and lower DBC substrates, respectively. The power terminals are led out from the conductive copper layers of the upper and lower DBC substrates. This invention can realize the high-temperature packaging of SiC MOSFET modules. By introducing double-sided heat dissipation, the thermal performance can be improved effectively. The parasitic inductance of the module can be also reduced by using planar interconnection instead of wire bonding.

Packaging structure of a SiC MOSFET power module and manufacturing method thereof

The present disclosure provides an air-interface protocol stack configuration method, a data transmission method, an air-interface protocol stack configuration device and a data transmission device. The air-interface protocol stack configuration method includes steps of: configuring an air-interface protocol stack to be used for data transmission in accordance with data transmission characteristics of communication ends for the data transmission; and transmitting configuration information or identification information about the air-interface protocol stack to at least one of the communication ends for the data transmission.

Air-interface protocol stack configuration method, data transmission method, air-interface protocol stack configuration device, and data transmission device

A wireless network access control method is provided. After an RRC connection is established between a first base station and a UE, a radio bearer for the UE is established in accordance with a service request from the UE. When determining that the UE meets a requirement on communication with second base stations whose types are different from the first base station, a dedicated configuration resource is allocated for the UE for enabling the UE to initiate a dedicated uplink detection signal. Dedicated second base stations are instructed to measure the dedicated uplink detection signal initiated by the UE, and one of the dedicated second base stations is allocated for the UE in accordance with measurement results. The UE is instructed to perform data transmission through the second base station allocated for the UE.

Wireless network access control method, device and system

A method and a device for data transmission are provided. A transmission device determines a plurality of wireless links through which data is to be transmitted between the transmission device and a reception device, and transmits physical-layer transmission blocks including identical data packets to the reception device through the determined wireless links.

Method and device for data transmission

In dependence on interference information, one or more resource block groups are allocated from a frequency carrier for use by one set of plurality multiple sets of UEs. The frequency carrier includes one or more first resource block groups to be used for a beam forming mode and one or more second resource block groups to be used for a MIMO mode. This allocating can allow decreased interference between UEs using the beam forming mode and UEs using the MIMO mode. This may be applied to UEs having different DoA groups, so that different RBGs are assigned to different DoA beam forming groups to decrease interference with UEs in MIMO mode.

Method, apparatus and system

The present disclosure relates to the field of wireless communication technology, and provides a data transmission method and a data transmission device, so as to solve the problem in the related art where, for 5G application scenarios, in the case that an uplink scheduling algorithm for a conventional 4G system continues to be used, a large number of control signaling overheads are required due to the meteoric growth in the number of UEs to be connected. In the present disclosure, a network side device determines non-orthogonal multiple access basic transmission units allocated to UEs, detects a pilot signal from each UE on the corresponding non-orthogonal multiple access basic transmission unit, and in the case that the pilot signal has been detected, performs data detection on the UE which has transmitted the pilot signal through the non-orthogonal multiple access basic transmission unit.

Data transmission method and device

An addressing method is provided, including: determining, by a UE, configuration information of an uplink position signal; and transmitting, by the UE, the uplink position signal carrying an identifier of the UE to a network side in accordance with the determined configuration information, to enable the network side to determine addressing information of the UE in accordance with the identifier of the UE, and address the UE in accordance with the identifier and the addressing information of the UE in the case that it is necessary to address the UE.

Addressing method and addressing device

A communications method, device, and system for solving the connection and communications efficiency problem due to the presence of a large number of cells. The method comprises: a first local controller determines that a user equipment needs to establish a data bearer; data bearer configuration information for transmitting user data is generated; the data bearer configuration information is transmitted to a first local gateway and/or at least a first small base station, so that the network element entity that has received the data bearer configuration information establishes a data transmission channel according to the data bearer configuration information, the user equipment belonging to the first local controller and the first local gateway, the first small base station providing services to the user equipment.

Communications method, device, and system

A method and a device for configuring and determining a code superposition-based multiuser encoding mode are provided. The configuring method includes steps of: determining, by a network device, UEs by which an identical transmission resource is to be multiplexed; and configuring, by the network device, different columns in a preconfigured encoding matrix formed through multiuser code superposition for the UEs, so as to enable each UE to transmit data in accordance with an encoding mode corresponding to the column configured by the network device, at least two columns in the encoding matrix having different diversity orders.

Method and device for configuring and determining code superposition-based multiuser encoding mode

Disclosed are a network perception based service policy configuration method and network device, the method comprising: acquiring network perceived information of a first node; establishing an environment information map of the first node according to the network perceived information; acquiring characteristic information of the first node; configuring a service policy for the first node according to the characteristic information of the first node and the environment information map, thus configuring the service policy for the network node according to the network perceived information and the node characteristics.

Network perception based service policy configuration method and network device

A data transmission method and a data transmission device are provided. A transmission device classifies data symbols for each scheduled user into groups based on logic resource element groups determined based on encoding matrices each multiplexed by multiple users, encodes respective groups of data symbols for each user in accordance with the encoding matrices to determine groups of encoded data symbols for each user, subjects respective groups of encoded data symbols for each user to a mapping treatment based on logic resource elements, maps respective logic resource element groups to a physical resource block in accordance with a mapping mode, and transmits data to a reception device based on the physical resource block.

Data transmission method and data transmission device

A method and device for transmitting Internet Protocol (IP) data packet are disclosed by the present invention, the method comprising: an Access Point (AP) device obtains an IP data packet needing to be sent to an User Equipment (UE); said AP device use the type information of said IP data packet to determine the corresponding Data Radio Bearer (DBR) of said IP data packet; Said AP device sends said IP data packet to said UE through said DBR; in the embodiments of the present invention, when the AP device accesses the IP network locally or directly through the IP network, the Quality of Service (QoS) insurance of IP data packet in the air interface transmission is implemented, on the basis of the direct mapping between the type information and the data radio bearer.

Method and device for transmitting IP data packet

Growing community of inventors

Beijing, China

Fei Qin