Nokia Corporation

China Petroleum & Chemical Corporation

Sinopec Research Institute of Petroleum Engineering

Suli Zhao

Yan Wang

Sheng Shuang Li

Xiong Li

Xiaohua Yang

Yongxue Lin

Hao Guan

Zhoujun Li

Xianguang Wang

Jianwu Zhen

Xiuzhen Han

A composition and use thereof are disclosed herein. The composition comprises at least two selected from the group of amphiphilic block copolymer, polyurethane and acidic ionic compound. Also an oil-based drilling fluid comprising the composition and a method improving shearing force of oil-based drilling fluid are disclosed. The composition disclosed herewith can raise the shearing force of oil-based drilling fluid.

Composition and use therof, oil-based drilling fluid and a method for raising shearing force of oil-based drilling fluid

The present invention provides a method to enhance the RACH message transmission of a wireless communication systems. Therefore the known RACH procedure for uplink transmission is extended by additional steps in order to allow the usage of adaptive transmission parameters for uplink transmissions, preferably the usage of adaptive modulation and coding (AMC). This is advantageous because studies in high-speed downlink packet access show the possibility to increase the data rate of a downlink shared channel. The method according to the invention introduces a new RACH message preamble and enables the base station to estimate suitable adaptive transmission parameters like an AMC setting according to the current transmission conditions which are used during the RACH message transmission.

Method for adaptively setting transmission parameters for a random access channel transmission uplink procedure in a wireless communication system

Growing community of inventors

Beijing, China

Suli Zhao