Google Inc.

Ching-Jung Hsieh

Chih-Hsiang Wu

A radio access network (RAN) for configuring a user equipment (UE) transmits, to the UE, (i) a conditional configuration related to a base station operating in the RAN, and (ii) a condition to be satisfied before the UE applies the conditional configuration during a conditional procedure (), determines subsequently to the transmitting, that the UE is to perform an immediate procedure related to the RAN (), and provides, to the UE, an indication that the UE is to release the conditional configuration ().

Configuration handling at a user device

This document describes techniques and apparatuses for handling radio resource control (RRC) cell group configuration. In implementations, a base station () receives a first radio resource control message that requests a connection procedure between a user equipment () and the base station (e.g.,), such as a radio resource control resume request or a radio resource setup request. In response to receiving the first radio resource control message, the base station () generates a second radio resource control message that includes a cell-group-configuration information element that excludes a reconfiguration-with-sync information element (e.g.,). The base station () then transmits the second radio resource control message to the user equipment () (e.g.,). Afterward, the base station () receives, from the user equipment (), a third radio resource control message that indicates the connection procedure is complete (e.g.,).

Method for handling a radio resource control cell group configuration

This document describes techniques and apparatuses for handling radio resource control (RRC) cell group configuration. In implementations, a base station receives a first radio resource control message that requests a connection procedure between a user equipment and the base station, such as a radio resource control resume request or a radio resource setup request. In response to receiving the first radio resource control message, the base station generates a second radio resource control message that includes a cell-group-configuration information element that excludes a reconfiguration-with-sync information element. The base station then transmits the second radio resource control message to the user equipment. Afterward, the base station receives, from the user equipment, a third radio resource control message that indicates the connection procedure is complete.

This document describes methods and systems for user equipment (UE) context transfer over radio access network (RAN) paging. A first base station receives from a second base station a first message that includes a context that is associated with a user equipment while the user equipment was in an engaged mode with the second base station. The first base station transmits a second message that is a paging message to the user equipment and in response receives, from the user equipment, a third message that includes a resume message authentication code identifier. After the first base station verifies the third message using the resume message authentication code identifier, the first base station transmits, to the user equipment, a fourth message that enables the user equipment to resume the engaged mode with the first base station in accordance with the context.

User equipment context transfer over radio access network paging

This document describes methods, devices, systems, procedures, and means of maintaining communication and signaling interfaces during network role transitions, such as a secondary node change or a handover. A source secondary base station holds a source donor Central Unit (Source CU) for its own Distributed Unit (source DU) and for the Distributed Unit(s) of the node base station(s) (node DU). The source secondary base station connects to the node base station via a first F1 interface. The node DU triggers handover of the node base station and connected User Equipment (UE) from the source secondary base station to a target secondary base station. The node base station creates Transport Network Layer (TNL) connectivity toward a target donor Central Unit (Target CU) and exchanges application layer configuration data with the Target CU via a wireless backhaul link implemented utilizing the TNL connectivity. The node base station then sets up a second F1 interface with the Target CU and handover of the node base station and connected User Equipment (UE) from the source secondary base station to a target secondary base station is performed.

Maintaining communication and signaling interfaces through a network role transition

This document describes methods, devices, systems, and means for determining configurations for the exchange of configuration information during network role transitions, such as a secondary node change or a handover. A secondary base station () node includes a central unit (CU) () and one or more distributed units (DU) (). The secondary base station node is configured to receive an addition request message including configuration information and, based on the received configuration information, determine, at the CU () of the secondary base station (), whether to apply a full configuration or a delta configuration. The CU () generates secondary cell group information, based on cell group configuration information received from the one or more DUs (), and send an addition response message, including the generated secondary cell group information, to a master base station ().

Growing community of inventors

Taipei, Taiwan

Ching-Jung Hsieh