Abstract:
A user equipment according to the present invention transmits a medium access control (MAC) protocol data unit (PDU), containing the RRC message and a data volume and power headroom (DV-PH) report but no BSR, using a uplink grant received in a random access response.
Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting, by a user equipment (UE), data in a wireless communication system, the method comprising: receiving first transmission time interval (TTI) information for a radio bearer; and transmitting a data associated with the radio bearer based on the first TTI information.
Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for contention resolution in a random access procedure in a D2D communication system, the method comprising: transmitting a message containing a buffer status information for data transmission over PC5 interface in a random access procedure; receiving a Physical Downlink Control Channel (PDCCH) in response to the message; and considering contention resolution successful if the received PDCCH is addressed to sidelink-RNTI (SL-RNTI).
Abstract:
The invention relates to a method comprising classifying user equipment (UE) cells, to which carrier aggregation is applied, into a plurality of time advance groups. Uplink-time synchronization is managed using the time synchronization of a primary cell (Pcell) in the time synchronization group to which the primary cell belongs. For other time synchronization groups, the uplink time synchronization is managed using the time synchronization of a secondary cell (SCell) that is particularly set in the relevant time synchronization group. Thus, the plurality of time synchronizations can be effectively managed for the UE and a base station (BS).
Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for processing received RLC PDUs for D2D communication system, the method comprising: receiving a first RLC (Radio Link Control) PDU (Protocol Data Unit) for a RLC entity from a peer UE; setting a plurality of state variables for the RLC entity to initial values, respectively, wherein the plurality of state variables for the RLC entity comprises VR(UH) and VR(UR), and the an initial value of VR(UH) is a RLC sequence number (SN) of the first RLC PDU, and an initial value of VR(UR) is ‘the RLC SN of the first RLC PDU-offset’; and processing the first RLC PDU using the initial values.
Abstract:
A method and apparatus for indicating device-to-device (D2D) related information in a wireless communication system is provided. A user equipment (UE) indicates at least one of a service type of a D2D operation, quality of service (QoS) characteristics of the D2D operation or a D2D configuration to a network.
Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting a sidelink buffer status reporting in a D2D communication system, the method comprising: transmitting information related to a first destination information list including at least one groupcast destination ID and a second destination information list including at least one unicast destination ID; assigning values of destination index to groupcast destinations IDs in listing order in the first destination information list and remaining values of the destination index after setting to the groupcast destinations IDs to unicast destinations IDs in listing order in the second destination information list, sequentially; generating and transmitting a SL BSR MAC CE including at least one destination index field identifying at least one destination, when SL BSR is triggered.
Abstract:
A method is presented for configuring a device-to-device (D2D) mode by an eNodeB (eNB) in a wireless communication system. The eNB configures the D2D mode indicating which D2D mode a user equipment (UE) operates in for a D2D communication. The eNB transmits an information on the configured D2D mode to the UE. The D2D mode is one of an evolved-universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN) planned mode or a UE autonomous mode. The E-UTRAN planned mode is a D2D mode in which the eNB controls radio resources for the D2D communication, and the UE autonomous mode is a D2D mode in which the UE controls radio resources for the D2D communication.
Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for processing a PDCP SDU in a dual connectivity system, the method comprising: receiving a PDCP SDU (Packet Data Convergence Protocol Service Data Unit) from a upper layer; starting a timer associated with the PDCP SDU; checking whether a certain condition related to the PDCP SDU process is satisfied or not if the timer expires; and discarding the PDCP SDU if the certain condition related to the PDCP SDU process is satisfied.
Abstract:
A communication method performed by a user equipment (UE). The UE receives, from a network, system information including one or more frequencies for a multimedia broadcast multicast service (MBMS) service and information of a mapping relationship between one or more frequencies and a plurality of MBMS services. The UE identifies, using the received system information, a specific frequency among the one or more frequencies for the MBMS service, and transmits, to the network, a radio resource control (RRC) message including the identified frequency for the MBMS service.