DATA FORWARDING IN LOWER-LAYER MOBILITY

Abstract

There are provided measures for enabling/realizing efficient/favorable data forwarding in lower-layer mobility in/for a mobile communication system, namely a radio access network of a mobile communication system, such as L1/L2 centric mobility. Such measures exemplarily comprise that a lower- layer entity in a radio access network of a mobile communication system obtains a configuration of lower-layer mobility and data forwarding in lower- layer mobility from a higher-layer control plane entity, initiates data forwarding to at least one target cell of lower-layer mobility in accordance with the configuration, and notifies a higher-layer user plane entity of initiation of data forwarding, wherein the at least one target cell of lower- layer mobility is identified. The configuration may indicate on-time data forwarding, wherein data forwarding to a target cell is triggered when a serving cell change decision is completed, or ay indicate early data forwarding upon preparation of candidate target cells for lower-layer mobility, wherein data forwarding to at least one of one or more candidate target cells is triggered when candidate target cells preparation is completed.

Documents