Abstract: A method for tr transmitting data by a node in a wireless communication system is disclosed. The method comprises transmitting the data related to the first set of bearers to a first node and transmitting the data related to the second set of bearers to a second node; based on a radio link problem related to the first node occurring, selecting at least one bearer among the first set of bearers based on a preconfigured criterion; and transmitting the data related to the selected at least one bearer to the second node.

Abstract: The present invention relates to a method of transmitting uplink (UL) data by a user equipment (UE) in a wireless communication system. In particular, the method includes the steps of: upon transmitting the UL data based on a configured grant (CG) configuration related to a Hybrid-ARQ (HARQ) process, starting a first timer related to the HARQ process and a second timer related to the HARQ process; and performing retransmission of the UL data based on the HARQ process, wherein an UL resource on which the retransmission is performed is determined based on whether a UL resource of the CG configuration is configured or not between an expiration time point of the first timer and an expiration time point of the second timer.

Abstract: A method for transmitting data units by a relay node configured with a first radio link control (RLC) entity and a second RLC entity in a wireless communication system is disclosed. Especially, the first RLC entity is active and the second RLC entity is inactive. The method comprises transmitting data units on the first radio link using a first RLC entity to a first node; activating the second RLC entity when a radio link problem occurs on the first radio link; and transmitting at least one data unit of the data units on the second radio link using the second RLC entity to a second node, wherein the at least one data unit is a data unit which is not successfully transmitted on the first radio link before the radio link problem occurs on the first radio link.

Abstract: The present invention relates to a method for performing retransmissions by a transmission end in a wireless communication system. In particular, the method includes the steps of: re-transmitting a data unit to a reception end; and increasing a retransmission counter associated with the data unit, when the retransmission counter associated with the data unit reaches to a max value, reporting a max retransmission indication to an upper layer and setting the retransmission counter associated with the data unit to zero.

Abstract: The present invention discloses a method of performing, by a user equipment (UE), wireless communications in a wireless communication system, the method comprising: receiving an activation command for activating a SPS resource; activating a cell related to the SPS resource if the cell is a deactivated cell; and activating the SPS resource on the activated cell.

Abstract: The present disclosure relates to method and apparatus for message processing wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device in a wireless communication system comprises: receiving, by an adapt entity of the wireless device, an adapt protocol data unit (PDU) comprising a payload for an upper layer entity and specific information informing whether the payload is to be processed by the upper layer entity; determining whether to process the adapt PDU by the adapt entity based on the specific information; and transmitting, by the adapt entity, the payload to the upper layer entity based on a determination that the adapt PDU is to be processed by the upper layer entity.

Abstract: The present disclosure relates to method and apparatus for handling backhaul link failure in wireless communications. According to an embodiment of the present disclosure, a method performed by a first wireless device in a wireless communication system comprises: detecting a failure of a backhaul link; performing a backhaul recovery attempt upon detecting the failure of the backhaul link; and transmitting a recovery notification to a second wireless device based on a determination that the backhaul recovery attempt succeeds.

Abstract: The present invention constructs L RLC PDUs, where L is larger than 1; and submit the L RLC PDUs to a medium access control (MAC) layer for a transmission opportunity. The L RLC PDUs include a first RLC PDU having a poll to trigger status reporting at a receiving device and a second RLC PDU not having the poll and having a highest sequence number (SN) among SNs of the L RLC PDUs. The present invention sets a state variable to a highest SN among SNs of RLC PDUs having the poll submitted to the MAC layer, upon submitting the first RLC PDU to the MAC layer.

Abstract: A method for transmitting a flow control request by a wireless node in a wireless communication system is disclosed. The method comprises receiving information related to a first destination and a second destination and information related to first and second threshold values for triggering the flow control request; based on a reception buffer status value being greater than the first threshold value and is less than the second threshold value, transmitting the flow control request to the first destination; and based on the reception buffer status value being greater than the second threshold value, transmitting the flow control request to the second destination.

Abstract: A method for transmitting a quality of service (QoS) state report by a wireless node in a wireless communication system is disclosed.

Abstract: A method for transmitting a buffer size report (BSR) by a wireless node in a wireless communication system is disclosed. The method comprises receiving logical channel group (LCG) configuration information including identities of LCGs from the network; generating the BSR including octet presence indications; and transmitting the BSR to a network, wherein each of the octet presence indications indicates whether a corresponding octet is present or not in the BSR, wherein a number of the octet presence indications is variable according to a highest value of the identities of LCGs.

Abstract: If there are missing RLC SDU(s) and/or missing RLC SDU segment(s), a receiving device transmits a STATUS PDU to a transmitting device in order to inform the missing RLC SDU(s) and/or missing RLC SDU segment(s). If there are multiple RLC SDU segments belonging to one RLC SDU, the STATUS PDU of the present invention one sequence number (SN) for the multiple missing RLC SDU segments, which is the same as a SN of the RLC SDU, and location information on each of the multiple missing RLC SDU segments within the RLC SDU.

Abstract: The present invention constructs L RLC PDUs, where L is larger than 1; and submit the L RLC PDUs to a medium access control (MAC) layer for a transmission opportunity. The L RLC PDUs include a first RLC PDU having a poll to trigger status reporting at a receiving device and a second RLC PDU not having the poll and having a highest sequence number (SN) among SNs of the L RLC PDUs. The present invention sets a state variable to a highest SN among SNs of RLC PDUs having the poll submitted to the MAC layer, upon submitting the first RLC PDU to the MAC layer.

Abstract: A method of performing, by a user equipment (UE), wireless communication using a serving cell in a wireless communication system is provided. The method includes: starting a deactivation timer associated with the serving cell, the deactivation timer relating to a duration of time after which the serving cell is deactivated; determining whether there is an uplink (UL) grant or a downlink (DL) assignment for the serving cell in a time unit; based on a determination that there is an UL grant or a DL assignment, determining whether a data unit is transmitted on the UL grant or is received on the DL assignment; based on a determination that the data unit is transmitted on the UL grant or is received on the DL assignment: restarting the deactivation timer associated with the serving cell; and transmitting the data unit on the UL grant or receiving the data unit on the DL assignment.

Abstract: A communication device, processing device or method constructs M RLC PDUs including M RLC SDUs, respectively, where M is larger than 1; submits, for a transmission opportunity, only L RLC PDUs for L RLC SDUs with lowest L SNs among the M RLC PDUs to a MAC layer, where L<M and the L RLC PDUs include a first RLC PDU having a poll to trigger status reporting at a receiving device; transmits the L RLC PDUs to the receiving device; constructs a second RLC PDU including a second RLC SDU having a highest SN among SNs of RLC SDUs submitted to the MAC layer, when the poll retransmission timer started upon submitting the first RLC PDU having the poll expires and no new RLC SDU or RLC SDU segment can be transmitted.

Abstract: In the present invention, a radio link control (RLC) entity of the receiving device receives an RLC service data unit (SDU) segment of a first RLC SDU. The RLC entity starts a first reassembly timer for the first RLC SDU if the RLC SDU segment of the first RLC SDU is the first one received for the first RLC SDU at the RLC entity. The receiving device uses a reassembly timer per RLC SDU segmented.

Abstract: A method of performing, by a user equipment (UE), wireless communication using a serving cell in a wireless communication system is provided. The method includes: starting a deactivation timer associated with the serving cell, the deactivation timer relating to a duration of time after which the serving cell is deactivated; determining whether there is an uplink (UL) grant or a downlink (DL) assignment for the serving cell in a time unit; based on a determination that there is an UL grant or a DL assignment, determining whether a data unit is transmitted on the UL grant or is received on the DL assignment; based on a determination that the data unit is transmitted on the UL grant or is received on the DL assignment: restarting the deactivation timer associated with the serving cell; and transmitting the data unit on the UL grant or receiving the data unit on the DL assignment.

Abstract: A method for processing signals by a relay node in a wireless communication system is disclosed. The method comprises detecting a radio link failure (RLF) of a connection with a child node of the relay node; transmitting a message informing an occurrence of the RLF to a parent node of the relay node, wherein the message includes an identifier of the child node.

Abstract: In the present invention, the method, communication device or processing device determines an amount of uplink (UL) data available for a logical channel group (LCG); and transmit the buffer status report including information on the amount of UL data available for the LCG. In the present invention, the amount of UL data available for the LCG is selected based on all logical channels of the LCG except for a logical channel related to a suspended radio link control (RLC) entity among RLC entities configured for the communication or processing device.

Abstract: The present invention constructs L RLC PDUs, where L is larger than 1; and submit the L RLC PDUs to a medium access control (MAC) layer for a transmission opportunity. The L RLC PDUs include a first RLC PDU having a poll to trigger status reporting at a receiving device and a second RLC PDU not having the poll and having a highest sequence number (SN) among SNs of the L RLC PDUs. The present invention sets a state variable to a highest SN among SNs of RLC PDUs having the poll submitted to the MAC layer, upon submitting the first RLC PDU to the MAC layer.