China Academy of Telecommunications Technology

Cnpc Engineering Technology R&d Company Limited

Fei He

Li Long Chen

Fei Qin

Jing Fu

Yunjing Hou

Gang Wang

Gang Chen

Ming Ai

Tao Jia

Ming Al

Li Chen

Mingjie Lv

Zhitong Liu

Binggui Xu

Hongwei Yin

Huijuan Guo

Jianli Wang

Yongliang Yu

Guojun Liu

Wanjun Li

Yingjie Zhu

Quanli Zhang

Shaohua Zhou

Mingmin He

The present invention discloses an expandable liner hanger system comprising a central pipe and an expandable pipe, with an expansion cone provided therebetween the central pipe and expandable pipe in a way that the expansion cone is movable along the central pipe, so that the expandable pipe is expanded; wherein, the expansion cone comprises an expansion cone seat move along the central pipe, and an expansion cone sleeve fitted over the expansion cone seat, the connection between the expansion cone seat and the expansion cone sleeve is configured in a way that the expansion cone sleeve can move upward together with the expansion cone seat along the central pipe so that the expandable pipe is expanded, and the central pipe can drive the expansion cone seat to disengage from the expansion cone sleeve.

Expandable liner hanger

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

Disclosed are a data transmission method and device, used to solve the problem of achieving air interface group calling and multicasting when a base station is connected to a network side via an IP interface; the data transmission method of the present invention comprises: the base station determines a group air interface identifier corresponding to an IP broadcast address or an IP multicast target address; the base station assigns the air interface identifier to a user equipment in the group; and the base station schedules and transmits the air interface data via the air interface identifier.

Data transmission method and device

Growing community of inventors

Beijing, China

Fei He