Abstract: A method and apparatus for reporting data transmission procedure failure for network optimization in a wireless communication system is provided. A wireless device performs the data transmissions to a network in idle state and/or inactive state. A wireless device detects failures of the data transmissions. A wireless device logs information related to each of the failures and counts a number of the failures, while the logging validity timer is running. A wireless device establishes or resumes a connection with the network based on that the counted number is equal to or bigger than a threshold value.

Abstract: A method and apparatus for combining UL data with a feedback of DL data in a wireless communication system is provided. A wireless device receives, from a network, information informing whether an application level uplink (UL) data, subsequent to a downlink (DL) data, is expected or not. A wireless device initiates random access procedure. A wireless device receives, from the network, the DL data in the random access procedure. A wireless device transmits a UL signaling including both the application level UL data and a feedback of the DL data based on the information informing that the application level UL data subsequent the DL data is expected.

Abstract: Provided are a method for skipping contention resolution. According to an embodiment of the present disclosure, the method includes leaving radio resource control (RRC) connected state, while leaving RRC connected state, receiving information on timing advance in a paging occasion, adapting the timing advance and performing transmission based on the adapted timing advance.

Abstract: Provided are a method of performing cell reselection and a device supporting the method. According to one embodiment of the present disclosure, the method includes: starting data transmission or data reception while the UE is in radio resource control (RRC) idle state or RRC inactive state; applying an offset value to a serving cell for cell reselection; performing cell reselection based on the applied offset value, during the data transmission or data reception; and stopping applying the offset value to the serving cell, when the data transmission or data reception is succeeded.

Abstract: Proposed in the present specification is a method for transmitting and receiving urgent information in a wireless communication system supporting machine type communication, and a device for same. Specifically, a method performed by a terminal may include the steps of: receiving information including a Reference Signal Received Power (RSRP) threshold value from a base station; determining a Coverage Enhancement (CE) mode on the basis of the RSRP threshold value and an RSRP measurement value; determining a Physical Random Access Channel (PRACH) resource on the basis of the CE mode; and transmitting a PRACH preamble to the base station on the basis of the PRACH resource.

Abstract: A method and an apparatus for entering a connected state with a network for continuing transmission in a wireless communication system is provided. The method may include starting a Time Alignment Timer (TAT). The method may include leaving a connected state with a network. The method may include performing transmission with a configured grant, wherein the configured grant is received from the network, while in leaving the connected state. The method may include performing a random access (RA) to the network, after the TAT is expired.

Abstract: A method and apparatus monitoring preconfigured downlink resource (PDR) based on the uplink transmission in a wireless communication system is provided. A wireless device receives, from a network, uplink (UL) resource and configuration of preconfigured downlink (DL) resource related to the UL resource and. A wireless device determines whether to monitor the PDR based on usage of the UL resource and/or success of UL transmission via the UL resource.

Abstract: Provided are a method for skipping contention resolution. According to an embodiment of the present disclosure, the method includes leaving radio resource control (RRC) connected state, while leaving RRC connected state, receiving information on timing advance in a paging occasion, adapting the timing advance and performing transmission based on the adapted timing advance.

Abstract: A method and apparatus for paging procedure considering network slicing in a wireless communication system is provided. A wireless device receives, from a network, a paging message including information related to a mobile terminated (MT) service. A wireless device transmits, to the network, a paging response message including information on Single-Network Slice Selection Assistance Information (S-NSSAI) for the MT service. A wireless device receives, from the network, the MT service from a cell related to the S-NSSAI. The cell is determined based on the paging response message.

Abstract: A method and apparatus for support of CU-DU split in MT-EDT procedure in a wireless communication system is provided. A Central Unit (CU) of a Radio Access Network (RAN node) receives, from a Distributed Unit (DU) of the RAN node, second information related to a transport block used for the wireless device. The CU decides a Radio Resource Control (RRC) state for transmitting the downlink (DL) data to the wireless device based on the first information related to the DL data and the second information related to the transport block.

Abstract: A method and apparatus for handling security information between a wireless device and a network for a fast RRC release procedure in a wireless communication system will be provided. A core network node in a wireless communication system receives, from a radio access network (RAN) node, a UE context resume request message including a fast Radio Resource Control (RRC) release indication. The fast RRC release indication informs that the RAN node transmits an RRC release message to a wireless device before the core network node receives the UE context resume request message. A core network node determines to stop computation of new security information for the wireless device based on the fast RRC release indication. A core network node transmits a UE context resume response message to the RAN node.

Abstract: A method and apparatus for discarding data among associated transmission buffers in a wireless communication system is provided. A wireless device generates a first data packet and a second data packet, and performs a random access (RA) procedure based on the first data packet. When the RA procedure based on the first data packet fails, the wireless device discards the first data packet, and continues the RA procedure based on the second data packet. A media access control (MAC) layer indicates a radio resource control (RRC) layer that the RA procedure based on the second data packet is performed.

Abstract: The present specification proposes a method for transmitting or receiving emergency information in a wireless communication system supporting machine type communication and a device therefor. Specifically, the method performed by a terminal may comprise the steps of: receiving discontinuous reception (DRX)-related information from a base station through radio resource control (RRC) signaling; receiving a paging message from the base station on the basis of the DRX-related information; and transmitting a physical random access channel (PRACH) preamble to the base station on the basis of the paging message emergency.

Abstract: Provided are a method for transmitting a message by a user equipment (UE) in a wireless communication, and an apparatus supporting the same. The method may include: initiating early data transmission; receiving a random access response message including an uplink grant, from a base station (BS); based on the uplink grant, determining whether or not to transmit a first message related to the early data transmission to the BS, in response to the random access response message; and after determining to transmit the first message related to the early data transmission, resuming radio bearers for the early data transmission.

Abstract: A method and apparatus for completion mechanism for transmission using preconfigured uplink resource (PUR) in a wireless communication system is provided. While in a radio resource control (RRC) idle state and/or an RRC inactive state, a wireless device configured to operate in a wireless communication system i) performs uplink (UL) data transmission using a preconfigured uplink resource (PUR) to a network, ii) attempts to acquire downlink (DL) information on a physical downlink shared channel (PDSCH) from the network, and iii) based on the DL information including only timing advance command (TAC) media access control (MAC) control element (CE), considers that the UL data transmission using the PUR is successful.

Abstract: A method and apparatus for path selection scheme for a master cell group (MCG) failure reporting is provided. A wireless device configured to operate in a wireless communication system determines a path for master cell group (MCG) failure information to inform a failure on a primary cell (PCell) of a MCG from among the at least one secondary ell (SCell) of the MCG and a secondary cell group (SCG), and transmits the MCG failure information via the determined path.

Abstract: Provided are a method for skipping contention resolution. According to an embodiment of the present disclosure, the method includes: detecting data to be transmitted; receiving information informing that the data does not require a contention resolution; transmitting the data on a logical channel; and completing transmission of the data, based on an acknowledgement for the data or a number of transmission of the data.

Abstract: The present invention relates to a method for transmitting signals by a user equipment (UE) in a radio resource control (RRC) inactive state or a RRC idle state at a wireless communication system. In particular, the method includes the steps of: measuring neighboring cells; identifying one of the neighboring cells fulfilled with conditions for a cell reselection procedure based on a result of measuring; determining whether to perform the cell reselection procedure with the one of the neighboring cells by considering a timer; and transmitting an uplink data or receiving a downlink data, without performing the cell reselection procedure during the timer is running, when it is determined not to perform the cell reselection procedure.

Abstract: A method and apparatus for combining MO EDT procedure with MT EDT procedure in a wireless communication system is provided. A wireless device receives, from a network, a paging including an indication informing that a mobile terminated early data transmission (MT EDT) procedure is initiated. A wireless device receives initiates the MT EDT procedure. A wireless device receives transmits, to the network, a specific random access preamble in the MT EDT procedure, wherein the specific random access preamble informs that an UL data originated by the wireless device is available.

Abstract: Presented in the present specification are a method for transmitting/receiving emergency information in a wireless communication system supporting machine type communication, and a device therefor. Particularly, the method performed by a terminal can comprise the steps of: receiving, from a base station, a system information block (SIB) including scheduling information about emergency information; receiving, from the base station, configuration information about the search space; receiving, from the base station, downlink control information (DCI) for the notification of the emergency information in the search space; and receiving, from the base station, the emergency information on the basis of the DCI and the scheduling information.