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

Abstract

A method of dual connectivity for connecting a User Equipment, UE, with a radio access network, RAN, in a telecommunication network, wherein said RAN comprises a plurality of Baseband Units, BBU's, wherein said UE comprises two multi layered protocol stacks, comprising the RLC protocol, that can be used for same type of connections with BBU's and wherein said UE is connected to a first BBU using afirst of said two protocol stacks for communication with said first BBU, said method comprising the steps of receiving, by a second BBU, from a network node in said telecommunication network, a StackSelector parameter, wherein said Stack Selector parameter indicates which of said two protocol stacks are to be used by said UE for said communication with said second BBU, transmitting, by said second BBU, to said UE a downlink grant message, wherein said downlink grant message comprises said Stack Selector parameter.

Description

Technical field [0001] The present invention generally relates to a radio access network, and more specifically relates to an action of connecting a user equipment UE to a baseband unit included in the access network. Background technique [0002] The radio access network RAN ​​is a part of the telecommunications network, which is responsible for connecting the user equipment UE to the core network. The radio access network implements certain wireless access technologies, such as third-generation 3G, fourth-generation 4G, and long-term evolution LTE. [0003] There are different types of radio access networks. For example, the Universal Terrestrial Radio Access Network UTRAN is a term for networks and equipment used to connect UEs to the public Internet. UTRAN includes base stations and radio network controllers called Node Bs. Another example is the evolved universal terrestrial radio access network E-UTRAN, which was originally a replacement for the universal mobile telecommun...

AI Technical Summary

Problems solved by technology

[0012] One of the disadvantages of existing techniques is that it is difficult to achieve tight coordination of link adaptation, scheduling, and physical layer processing without the need for tight coordination of packet control functions

This may limit tight TRP coordination to scenarios where TRPs are connected to the same network node, limiting opportunities for coordination gain

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