US Patent No. 10,462,841

EFFICIENT SECONDARY CELL GROUP CHANGE PROCEDURE FOR DUAL CONNECTIVITY


Patent No. 10,462,841
Issue Date October 29, 2019
Title Efficient Secondary Cell Group Change Procedure For Dual Connectivity
Inventorship Tsunehiko Chiba, Saitama (JP)
Assignee Nokia Solutions and Networks Oy, Espoo (FI)

Claim of US Patent No. 10,462,841

1. A method, comprising:receiving, at a master network node from a secondary network node, a secondary network node modification required message comprising secondary cell group configuration information for a plurality of secondary cell group data radio bearer type changes, wherein the secondary network node modification required message is configured to initiate a secondary network node modification procedure;
deciding to reject at least one of the plurality of secondary cell group data radio bearer type changes;
deciding to accept at least one other of the plurality secondary cell group data radio bearer type changes;
sending, from the master network node to the secondary network node, a secondary network node modification request comprising an indication that the master network node rejected the at least one of the plurality of secondary cell group data radio bearer type changes, and that release of at least one secondary cell group data radio bearer, for which the master network node rejected a secondary cell group data radio bearer type change, is to be performed with the secondary network node; and
sending, from the master network node to a terminal, a connection reconfiguration message, wherein the connection reconfiguration message includes secondary cell group configuration information for the at least one accepted secondary cell group data radio bearer type change, wherein the sending of the connection reconfiguration message is done before the master network node receives a secondary network node modification request acknowledgement from the secondary network node.