Method and device for uplink data transmission

Abstract

Embodiments of the present invention relate to an uplink data transmission method and device. The method comprises: a user equipment (UE) obtains resource allocation information sent by a first base station; if the UE determines that a data size of a split bearer is smaller than or equal to a predetermined value, and a BSR comprising data buffer state information of the split bearer is sent to the first base station, then a first MAC entity of the UE allocates, according to the resource allocation information, a transmission resource for the split bearer, and / or the first MAC entity sends data transmission indication information to a PDCP layer of the UE. The uplink data transmission method and device in the embodiments of the present invention can prevent a resource waste and an influence on the transmission quality of other services due to resource preemption of a split bearer, thereby ensuring uniformity between different services, and accordingly improving the resource utilization efficiency.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for uplink data transmission. Background technique [0002] In order to support a higher data rate, and to enable UE to simultaneously aggregate component carriers of different base stations (such as macro base stations and small base stations), the 3rd Generation Partnership Project (the 3rd Generation Partner Project, referred to as "3GPP") introduces dual Connection (Dual Connectivity, referred to as "DC") technology. [0003] The main idea of ​​the DC technology is to aggregate the carriers of different base stations connected through non-ideal backhaul links (backhaul), so as to increase the data transmission rate. [0004] In dual connectivity, a UE will be connected to two evolved base stations (evolved Node B, referred to as "eNB") at the same time, one is the master base station (Master eNB, referred to as "MeNB"), and the other is the secondary bas...

AI Technical Summary

Problems solved by technology

[0007] Since the logical channel priority of the split bearer is higher than that of other bearers, when the UE receives the ULgrant information, it indicates data transmission to the PDCP layer, and the split bearer will be transmitted preferentially. However, in fact, the ULgrant may be UL grant scheduled by MeNB based on other bearers reported by UE

Therefore, in this case, the UL grant for data transmission of other bearers will be preempted by the split bearer, so that the service quality of other bearers cannot be guaranteed

[0008] In addition, the split bearer may have previously reported the cache status report to the SeNB. When the UE obtains the UL grant information from the SeNB, the PDCP data of the split bearer has already been transmitted from the MeNB, so that the UL grant allocated by the SeNB is not enough due to the data packets of the split bearer. lead to waste of resources

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