A data transmission method and device, base station and ue

Abstract

Disclosed are a data transmission method and apparatus, and a base station and a UE. The method comprises: establishing a standby data transmission channel on an MCG for an RB needing to use an SeNB resource; and during a change process of an SeNB, using the standby data transmission channel to transmit data, wherein the transmitted data comprises data that has been distributed to an RLC entity of a source SCG before the SeNB changes but is not completely transmitted in the source SCG.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a data transmission method and device, base station and UE. Background technique [0002] The cellular wireless mobile communication system began in the 1980s, and developed from meeting human voice communication needs at the beginning to gradually meeting human basic data communication needs on the basis of voice services. Traditional cellular wireless communication systems are deployed and operated by wireless network operators, and network construction has been carefully planned by operators. figure 1 It is a network topology diagram of a traditional cellular wireless access network, such as figure 1 As shown, the site selection of each macro base station (macro(e)NB) is determined by the operator's plan, and each macro base station can achieve wireless coverage of hundreds of meters or even thousands of meters, so that it can achieve near-continuous wireless coverag...

AI Technical Summary

Problems solved by technology

[0006] After the UDN network is deployed, when the user equipment / user terminal (UE, User Equipment) moves in such a dense network, compared with the original macro network with wide coverage, even if the UE moves at a walking speed, it will cause frequent smallcell changes, such as figure 2 The moving path 240 of the UE shown by the thick black solid line arrow in the middle, the UE will frequently change the smallcell in a short period of time

In related technologies, when a UE moves between different cells, a handover technology is used to realize the continuous transmission of data between different cells. The handover technology provided by the related technology is suitable for wide coverage macro networks or non-dense deployment networks. Directly applied to the UDN network that frequently changes small cells, although it can ensure the continuous transmission of data between frequently changed small cells, it will inevitably lead to frequent jitters in the data rate, which will eventually reduce the user data transmission rate and affect the user experience.

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