Provided are a data transmission method performed by a base station in a wireless communication system, and an apparatus using the method. The base station transmits a message requesting information for data transmission to a second base station and receives, from the second base station, a response message to the message requesting the information for data transmission, wherein the information for data transmission is to transmit data on a terminal in a light connection state.

To provide a communication terminal that ensures the coincidence of Paging timing between a UE and a control device when an eDRX parameter is updated in a control device, a communication terminal (10) according to the present disclosure includes a receiving unit (11) for receiving a Tracking Area Registration Accept message or a Location Registration Accept message sent from a control device (30), and a sending unit (12) for sending a Tracking Area Registration Complete message or a Location Registration Complete message to the control device (30) when a first eDRX (Extended Idle Mode DRX) parameter is contained in the Tracking Area Registration Accept message or the Location Registration Accept message.

The present disclosure relates to a communication technique for combining, with an IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and to a system therefor. The present disclosure may be applied to intelligent services (e.g., a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, security and safety-related service, etc.), based on a 5G communication technology and an IoT-related technology. A method for a user equipment in a first communication system according to the present invention comprises a user equipment in an inactive state: transmits a paging area update request message; checks whether a timer associated with a paging area update has expired; and transitions into an idle state if a response message for the paging area update request message has not been received until the timer expired.

Certain aspects of the present disclosure provide techniques for adaptive paging in sidelink relay scenarios. An example method for adaptive paging by a remote UE generally includes connecting, via a sidelink, to a relay node connected to a network entity, sending an indication of a preferred paging mode to at least one of the relay node or the network entity, and monitoring for paging in accordance with the preferred paging mode, if the UE receives signaling configuring the UE for the preferred paging mode.

Certain aspects of the present disclosure provide techniques for adaptive paging in sidelink relay scenarios. An example method for adaptive paging by a remote UE generally includes connecting, via a sidelink, to a relay node connected to a network entity, sending an indication of a preferred paging mode to at least one of the relay node or the network entity, and monitoring for paging in accordance with the preferred paging mode, if the UE receives signaling configuring the UE for the preferred paging mode.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may monitor paging search spaces that correspond to beams other than a serving beam if a signal to interference plus noise ratio (SINR) of the serving beam does not satisfy a SINR threshold. The UE may stop the monitoring if a paging message in the paging search spaces has been successfully decoded. In some aspects, a UE may determine whether a paging search space that corresponds to a serving beam is a last paging search space in a first paging occasion, after the UE decoded a paging downlink control information and failed to decode a paging physical downlink shared channel on the serving beam. The UE may monitor paging search spaces, in a second paging occasion, that correspond to paging search spaces of the first paging occasion. Numerous other aspects are provided.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may monitor paging search spaces that correspond to beams other than a serving beam if a signal to interference plus noise ratio (SINR) of the serving beam does not satisfy a SINR threshold. The UE may stop the monitoring if a paging message in the paging search spaces has been successfully decoded. In some aspects, a UE may determine whether a paging search space that corresponds to a serving beam is a last paging search space in a first paging occasion, after the UE decoded a paging downlink control information and failed to decode a paging physical downlink shared channel on the serving beam. The UE may monitor paging search spaces, in a second paging occasion, that correspond to paging search spaces of the first paging occasion. Numerous other aspects are provided.

A method comprising configuring a user equipment in a low activity state to operate within a radio access network wherein a radio access network notification area for the user equipment is defined based on a list of logically associated radio access network paging areas, wherein each of the logically associated radio access network paging areas is a subset of a core network tracking area identified by a paging area code value which is unique within the core network associated tracking area.

A method comprising configuring a user equipment in a low activity state to operate within a radio access network wherein a radio access network notification area for the user equipment is defined based on a list of logically associated radio access network paging areas, wherein each of the logically associated radio access network paging areas is a subset of a core network tracking area identified by a paging area code value which is unique within the core network associated tracking area.

An energy saving method, a terminal device, and a network device, capable of implementing energy saving of a terminal device in an RRC disconnected state, the method comprising: a terminal device receives first information, the first information comprising paging energy saving configuration information corresponding respectively to each terminal device group amongst a plurality of terminal device groups, each terminal device group comprising at least one terminal device, and the paging energy saving configuration information corresponding to each terminal device group being used for determining whether the at least one terminal device in the terminal device group receives a paging message; and the terminal device performs paging message reception on the basis of the paging energy-saving configuration information corresponding to the terminal device group to which the terminal device belongs.