US 10,462,841 B2
Efficient secondary cell group change procedure for dual connectivity
Tsunehiko Chiba, Saitama (JP)
Assigned to Nokia Solutions and Networks Oy, Espoo (FI)
Appl. No. 15/542,492
Filed by Nokia Solutions and Networks Oy, Espoo (FI)
PCT Filed Jan. 14, 2015, PCT No. PCT/EP2015/050558
§ 371(c)(1), (2) Date Jul. 10, 2017,
PCT Pub. No. WO2016/112970, PCT Pub. Date Jul. 21, 2016.
Prior Publication US 2018/0288826 A1, Oct. 4, 2018
Int. Cl. H04L 12/56 (2006.01); H04W 76/34 (2018.01); H04W 76/15 (2018.01)
CPC H04W 76/34 (2018.02) [H04W 76/15 (2018.02)] 12 Claims
OG exemplary drawing
 
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.