Telefonaktiebolaget Lm Ericsson (publ)

Southwest Petroleum University

Min Wei

Hang Li

Youping Su

Chengyang Zhang

Yunfei Wang

Nutao Wang

Jie Yan

Jia Chen

Bin Xia

Xiandong Jiang

A method for determining well wall collapse of a single well for a fractured-vuggy reservoir is provided. The method includes following steps: S, treating the single well of the fractured-vuggy reservoir as an isolated reservoir; S, calculating a water influx rate for the fractured-vuggy reservoir; S, substituting a formula of the water influx rate into a material balance equation; S, calculating a change of an oil productivity index without considering the well wall collapse; S, establishing an optimizing model for obtaining the oil productivity index; S, calculating the formation pressure at any time in production through step S; S, calculating the oil productivity index at any time through the formation pressure, and establishing an optimal objective function; and S, calculating a difference between the oil productivity index at any time and the theoretically calculated oil productivity index at any time, and determining whether the difference meets an accuracy requirement.

Method for determining well wall collapse of single well for fractured-vuggy reservoir

The present disclosure provides a full duplex communication method implemented by a Radio Base Station (RBS) supporting Time Division Duplex (TDD) scheme and the associated RBS. The method comprises configuring a first logic cell and a second logic cell for the RBS by specifying a first downlink/uplink (DL/UL) configuration corresponding to the first logic cell and a second, different DL/UL configuration corresponding to the second logic cell. The method also comprises transmitting a first wireless signal to a first UE associated with one of the first and the second logic cells and receiving a second wireless signal from a second UE associated with the other of the first and the second logic cells simultaneously in a subframe, which is allocated for DL communication according to one of the first and the second DL/UL configurations corresponding to the one of the first and the second logic cells and is allocated for UL communication according to the other of the first and the second DL/UL configurations corresponding to the other of the first and the second logic cells. Self-interference suppression is performed to suppress interference from the transmission of the first wireless signal to the reception of the second wireless signal.

Full duplex communication method and associated radio base station

Method and apparatus for antenna calibration have been disclosed. A radio unit () is provided. The radio unit () may comprise: a plurality of transmit/receive (TX/RX) paths; a plurality of radio frequency (RF) ports () connected with the plurality of TX/RX paths; and a coupling unit (), coupled with the plurality of TX/RX paths and configured to inject an uplink (UL) calibration signal () into at least one of the plurality of TX/RX paths and extract a downlink (DL) calibration signal () from at least one of the plurality of TX/RX paths. A normal TX/RX path may be reused both for antenna calibration and antenna supervision. Thus, a low cost hardware solution for antenna calibration is provided. An AIR base station () comprising such radio unit () is also provided.

Method and apparatus for antenna calibration

A compression method is disclosed, which comprises receiving an OFDM data block comprising a plurality of complex valued data samples wherein each in-phase and quadrature sample value is represented by a first number of bits. The method also comprises calculating an average of absolute sample values of the OFDM data block and mapping the average absolute sample value to a standard deviation value. The method further comprises quantizing each of the sample values using quantization thresholds scaled by the standard deviation value to produce quantized in phase and quadrature sample value representations, each comprising a second number of bits, and mapping the standard deviation value and the quantized sample value representations to an OFDM transmission frame. Corresponding de-compression method, compressor, de-compressor and network node are also disclosed.

Compression and de-compression of complex valued OFDM data for a radio base station

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Sichuan, China

Min Wei