Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for performing a discontinuous reception (DRX) operation in a wireless communication system. According to an aspect of the present invention, the method comprising: receiving information on an extended DRX cycle; and calculating a start frame offset for monitoring one or more paging occasions based on the extended DRX cycle and an identity of the UE.
Abstract:
A method for communicating a relay user equipment (UE) for a device to device (D2D) link at a UE in a wireless communication system is disclosed. The method includes steps of receiving, from the relay UE, information on an identifier of a second cell connected with the relay UE; transmitting, to a first cell connected with the UE, an assistance message including information that an identifier of the first cell is different from the identifier of the second cell; receiving, from the first cell, a resource allocation message including resource information for a communication via the relay UE; and performing the communication via the relay UE based on the resource information.
Abstract:
A method for transmitting a discovery signal by a user equipment (UE) in a wireless communication system is disclosed. The method includes steps of receiving a threshold value broadcasted from a cell; measuring a quality of a first channel from the cell; and when the quality of the first channel is below the threshold value, transmitting the discovery signal for establishing a device to device (D2D) link with a relay UE.
Abstract:
In an aspect, a method and apparatus for performing random access in a wireless communication system is provided. A user equipment (UE) receives a first set of random access channel (RACH) resources for a short transmission time interval (TTI) and a second set of RACH resources for a normal TTI from an eNodeB (eNB), and performs random access towards the eNB by using the first set of RACH resources for the short TTI. In another aspect, a method and apparatus for performing contention based uplink (UL) transmission in a wireless communication system is provided. A UE receives resources for contention based UL (CB-UL) transmission, and performs the CB-UL transmission by using the resources for the CB-UL transmission.
Abstract:
A method and apparatus for determining to be a relay UE in a wireless communication system. A user equipment (UE) receives reference signal received power (RSRP) based criteria from a network, and determines to be a relay UE when a specific condition corresponding to the RSRP based criteria is met. The UE may further receive a hysteresis value from the network. When a measured RSRP of the UE plus the hysteresis value is below the RSRP threshold, the UE may determine to be a relay UE.
Abstract:
A method and apparatus for performing a buffer status reporting (BSR) procedure in a wireless communication system is provided. A relay user equipment (UE) receives data to be relayed from a remote UE via sidelink, triggers a BSR or a sidelink BSR for the data to be relayed, and transmits the BSR or the sidelink BSR to a network.
Abstract:
A method and apparatus for selecting a relay UE in a wireless communication system is provided. A remote UE selects a relay UE whose measured channel quality with the remote UE satisfies a condition based on a threshold, and transmits data, which is required to be relayed by the relay UE to a network, to the relay UE.
Abstract:
A method and apparatus for performing traffic steering in a wireless communication system is provided. A user equipment (UE) may be configured with a primary cell (PCell) and at least one secondary cell (SCell) by carrier aggregation. Or, the UE may be configured with a PCell of a master evolved NodeB (MeNB) and a primary SCell (PSCell) of a secondary eNB (SeNB) by dual connectivity. For one embodiment, the UE receives radio access network (RAN) assistance information on the PCell, and evaluates conditions for traffic steering only on the PCell based on the received RAN assistance information. For another embodiment, the UE receives RAN assistance information for each of a plurality of serving cells, and performs traffic steering between one serving cell, among the plurality of serving cells, and a wireless local area network (WLAN).
Abstract:
Provided are a method for decoding downlink control information, DCI, in a wireless communication system and a wireless apparatus using the method. The method is characterized by: receiving the DCI from a base station; and decoding the DCI, wherein based on the DCI activating a sidelink semi-persistent scheduling, SPS, between the UE and another UE for a Vehicle-to-Everything, V2X, communication, the DCI comprises (i) a sidelink SPS configuration index field and (ii) a sidelink SPS activation field, and wherein the sidelink SPS configuration index field informs a sidelink SPS configuration that is related to control information of the DCI and the sidelink SPS activation field informs an activation of the sidelink SPS configuration.
Abstract:
Provided are a method and a device for receiving information indicating the type of a signaling radio bearer (SRB) in a wireless communication system. A user equipment (UE): receives a first radio resource control (RRC) message including information indicating the type of SRB on which a second RRC message, which is a message corresponding to the first RRC message, is to be transmitted; and transmits the second RRC message via the type of SRB indicated by the information indicating the type of SRB. Accordingly, the type of bearer on which a first message is received and the type of bearer on which a second message is transmitted in a single RRC procedure may be identical or mutually different.