US 11,147,111 B2 · Inter-MeNB handover method and device in a small cell system

Abstract

An embodiment of the present disclosure may provide an inter-MeNB handover method in a small cell system, including: making, by a source MeNB and/or target MeNB, a determination as to whether to maintain a SeNB when handover is performed; and triggering different handover processes according to a result of the determination as to whether to maintain the SeNB. Another embodiment of the present disclosure may further provide an inter-MeNB handover device in a small cell system. With the inter-MeNB handover method and device in a small cell system provided by the present disclosure, unnecessary deletion and re-establishment of the bearers at the SeNB for the UE may be reduced. False bearer deletion may be avoided and data forwarding may be reduced. Furthermore, the SeNB may be maintained according to network deployment and SGW re-selection may be supported. Therefore, system capacity and transmission speed of the data may be improved.

Claims6

Dependent claims

A method of a secondary base station in a handover procedure from a source master base station to a target master base station keeping the secondary base station in a wireless communication system supporting dual-connectivity, the method comprising:

receiving, by the secondary base station, from the target master base station, a first message including information indicating a key associated with security of the second base station and a request for a secondary cell group (SCG) configuration related to the secondary base station;
sending, by the secondary base station, to the target master base station, a second message including information on the SCG configuration in response to the first message;
and
receiving, by the secondary base station, from the target master base station, a third message indicating that radio resource control (RRC) configuration associated with a user equipment (UE) is completed in the handover procedure,
wherein the first message further includes at least one of an ID of the UE allocated at the secondary base station, an ID of the UE allocated at the target master base station,
wherein the ID of the UE allocated at the secondary base station is application protocol (AP) ID of the UE over an interface between the source master base station and the secondary base station, and
wherein the ID of the UE allocated at the target master base station is AP ID of the UE over an interface between the target master base station and the secondary base station.

4 more elements

Dependencies are inferred from the claim text.

Inter-MeNB handover method and device in a small cell system

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Inter-MeNB handover method and device in a small cell system

Life of this patent

Abstract

Claims6