Abstract:
A disclosure of the present invention provides a method for supporting a power saving mode (PSM) in a radio device. According to the method, the radio device may transmit a first message including a first activation time value to a network entity when the radio device requires the PSM. Then, the radio device may receive a second message including a second activation time value from the network entity. The radio device may enter a PSM state on the basis of the second activation time value. When it is necessary to stop the PSM or change the second activation time, the radio device may transmit a third message at the very time point.
Abstract:
The present invention relates to a wireless communication system. More specifically, a repeater operation method and apparatus are disclosed. A method for supporting a repeater by a base station in a wireless communication system according to an embodiment of the present invention may include the steps of: determining whether a relay communication about a target user equipment (UE) is required; and transmitting the repeater activation message to one or more repeater candidates. The activation message may include one or more parameters among an activation cycle, location, or a signal strength threshold for the one or more repeater candidates. A repeater satisfying the condition given by the one or more parameters from among the one or more repeater candidates can be activated as a repeater for the target UE.
Abstract:
A method for resuming an RRC connection performed by a UE in a wireless communication system may include entering an EMM-IDLE mode with a suspend indication as the RRC connection is suspended; generating an initial NAS message when a procedure using the initial NAS message is triggered; requesting a resume of the RRC connection from an upper layer of the UE to a lower layer; and switching from the EMM-IDLE mode with the suspend indication to an EMM-CONNECTED mode when the upper layer receives an indication that the RRC connection is resumed from the lower layer.
Abstract:
One embodiment provides a method for performing a mobility related procedure. The method may comprise: transmitting, by the UE configured with a 2nd/3rd generation mobile communication capability and 4th generation mobile communication capability, a mobility management request message to a first network entity in the 4th generation mobile communication network of a visited public land mobile network (VPLMN); receiving, by the UE and from the first network entity, a mobility management reject message including a rejecting cause value, a first timer and a second timer; if the rejecting cause value indicates that there is no suitable cell in the VPLMN, starting the first timer included in the mobility management reject message; if the first timer is expired, starting the second timer; and until the second timer is expired, disabling the 4th generation communication capability.
Abstract:
A disclosure of the present specification provides a method for transferring downlink data by a serving gateway (S-GW). The method may comprise the steps of: transmitting a downlink data notification (DDN) message to a mobility management entity (MME) and a serving general packet radio service (GPRS) supporting node (SGSN), when downlink data arrives at a wireless device in a state where an idle mode signaling reduction (ISR) is activated; receiving a message notifying of a DDN refusal from any one of the MME and SGSN when the wireless device, being in a power saving mode (PSM), cannot receive the downlink data; and transmitting a paging stop request message to any one of the MME and SGSN when the message indicating the refusal of the DDN is received.