Data transmission method and apparatus, base station, and UE

Abstract

The invention discloses a data transmission method and apparatus, a base station, and UE. The method includes: establishing a standby data transmission path for RBs requiring usage of SeNB resources on a MCG; and transmitting data by employing the standby data transmission path in a changing process of a SeNB, wherein the transmitted data at least comprises data distributed to a RLC entity of a source SCG but not completely transmitted at the source SCG before the change of the SeNB. According to the technical scheme, through the establishment of the standby data transmission path, in the changing process of the SeNB, the data is transmitted by employing the standby data transmission path, the continuity of data transmission in the changing process of the SeNB is guaranteed, smooth transmission of the data is realized, the data transmission rate for users is increased, and the user experience is enhanced.

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 changes in small cells, 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 small cell 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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