Method and device for dual connectivity between dual protocol stack user equipment and two baseband units of a radio access telecommunications network

摘要

A method of dual connectivity for connecting a user equipment (UE) to a radio access network (RAN) in a telecommunications network, said RAN comprising a plurality of baseband units (BBU) and said UE comprising two multilayered protocol stacks And an RLC protocol that can be used for the same type of connection with a BBU, wherein the UE uses the first of the two protocol stacks for communication with a first BBU. Receiving, by a second BBU, a stack selector parameter from a network node in the telecommunications network, wherein the stack selector parameter is a parameter of the communication with the second BBU. The two protocol stacks for Receiving, indicating which is to be used by the UE, and transmitting, by the second BBU, a downlink grant message to the UE, wherein the downlink grant message is the stack selector. Transmitting, including parameters. [Selection diagram] FIG.