Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for avoiding padding only MAC PDU in a D2D communication system, the method comprising: receiving a sidelink grant from a base station (BS) when the TX UE communicates with a receiving UE (RX UE) directly; checking size of the received sidelink grant; and transmitting a Medium Access Control Protocol Data Unit (MAC PDU) including at least one byte of Radio Link Control Service Data Unit (RLC SDU) if the size of received sidelink grant is larger than a minimum size of MAC PDU including only MAC header and Radio Link Control (RLC) header for Sidelink Traffic Channel (STCH).
Abstract:
A user equipment (UE) in a mobile communication system is described. The UE includes a long term evolution (LTE) transceiver for receiving configuration information from a network, and a processor for detecting an in-device coexistence (IDC) condition according to the configuration information and initiating a transmission of information on the detected IDC condition to the network. The information on the detected IDC condition comprises frequency information, and the transmission is initiated after the UE has failed to resolve the detected IDC condition on its own.
Abstract:
PDCP operations in a wireless communication system supporting dual connectivity are disclosed. According to this scheme, when the PDCP of the UE receives PDCP PDU from two RLCs, the PDCP reordering is performed first on the received PDCP PDU. Then, deciphering and decompressing are performed after the PDCP reordering.
Abstract:
A method and apparatus for performing cell reselection in a wireless communication system is provided. A user equipment (UE) in an idle mode camps on a second cell, and receives reselection information for dual connectivity, which indicates cell reselection to a first cell or cell reselection to a frequency of the first cell, from the second cell. If the UE supports dual connectivity, the UE performs cell reselection based on the received reselection information for dual connectivity.
Abstract:
A method and apparatus for performing a random access (RA) procedure in a wireless communication system is provided. A user equipment (UE) establishes connection with a first node and a second node, and transmits an RA preamble to the second node. If a number of RA preamble transmissions reaches a maximum number, the UE stops uplink (UL) transmission of all cells in a group to which the second node belongs, and transmits an indication indicating that transmission of the RA preamble has failed to the first node.
Abstract:
A method for reporting TAT (time alignment timer) status information at a user equipment (UE) in a wireless communication system is disclosed. The method includes a step of reporting the TAT status information for at least one TAG (time alignment group) to a network when a condition is met, wherein the TAT status information indicates whether the TAT for at least one TAG is running or not.
Abstract:
Provided is a cell reselection method performed by a terminal in a wireless communication system. The method includes: receiving first priority information for at least one frequency; receiving second priority information for the one or more frequencies; and selectively applying, based on the state of the terminal, any one of the first priority information and second priority information and performing cell reselection. The first priority information is provided through a connection rejection message and provides instructions on the priority for the one or more frequencies to be lowered. The second priority information is provided from a current cell through system information.
Abstract:
A method and a user equipment (UE) are described for transmitting power headroom (PH) information in a wireless communication system. A primary cell and at least one secondary cell are configured with the UE. One logical channel identifier (LCID) field is configured in a medium access control (MAC) sub-header. The one LCID field indicates a presence of a PH MAC control element (CE). A MAC protocol data unit (PDU) comprising the MAC sub-header and the PH MAC CE is transmitted. The PH MAC CE includes PH information for both the primary cell and the at least one secondary cell.
Abstract translation:描述了用于在无线通信系统中发送功率余量(PH)信息的方法和用户设备(UE)。 用UE配置主小区和至少一个辅助小区。 一个逻辑信道标识符(LCID)字段被配置在介质访问控制(MAC)子报头中。 一个LCID字段表示存在PH MAC控制元件(CE)。 发送包括MAC子标题和PH MAC CE的MAC协议数据单元(PDU)。 PH MAC CE包括用于主要小区和至少一个二级小区的PH信息。
Abstract:
The present disclosure relates to a method for managing random access (RA) resource partitions related to multiple features in a wireless communication system. In particular, the method includes the steps of: configuring a first random access (RA) resource associated with a first feature and a second RA resource associated with a second feature; triggering an RA procedure for two or more features including both the first feature and the second feature; selecting a RA resource of the first RA resource or the second RA resource based on priorities of the first RA feature and the second RA feature; and performing the RA procedure based on the selected RA resource, wherein intention information indicating the two or more features for which the RA procedure was triggered is provided to a network.
Abstract:
The present disclosure relates to a method of performing operations by PDCP entity of a User Equipment (UE). In particular, the method includes performing a transmission of a first PDCP SDU compressed based on a first UDC context, wherein the first UDC context is updated based on the first PDCP SDU; receiving a successful delivery confirmation of the first PDCP SDU, wherein a second UDC context is updated based on the first PDCP SDU; performing a transmission of a second PDCP SDU compressed based on the first UDC context, wherein the first UDC context is updated based on the second PDCP SDU; based on an indication for re-establishment being received before receiving a successful delivery confirmation of the second PDCP SDU, overriding the second UDC context to the first UDC context and performing a retransmission of the second PDCP SDU compressed based on the overridden first UDC context.