Abstract: An user equipment supporting Semi-Persistent Scheduling (SPS), the user equipment including: a receiver configure to receive sidelink (SL) SPS radio network temporary identifier (RNTI) from a base station; and receive a SL grant including downlink control information (DCI from the base station with a Physical Downlink Control Channel (PDCCH), wherein the DCI comprises a SL SPS index field and an activation/release indication field if the DCI with Cyclic Redundancy Check (CRC) is scrambled with the SL SPS RNTI, wherein a start subframe for Sidelink Control (SC) period is determined based on an offset value and a subframe in which the sidelink grant is received, and wherein an index of a subframe for SC period is relative to System Frame Number (SFN) 0.

Abstract: Disclosed is a method of performing a Hybrid Automatic Repeat reQuest (HARQ) operation by a user equipment (UE), including: establishing a Radio Resource Control (RRC) connection with a base station through a first serving cell, the first serving cell supporting a Time Division Duplex (TDD) mode; receiving an RRC message from the base station through the first serving cell, the RRC message including carrier aggregation (CA) configuration information, the CA configuration information including information of a second serving cell supporting a Frequency Division Duplex (FDD) mode, and the first serving cell and the second serving cell being aggregated by a TDD-FDD CA scheme; and determining a maximum number of DL HARQ processes for the second serving cell based on a uplink (UL)/downlink (DL) configuration of the first serving cell when the second serving cell is a secondary serving cell (SCell) associated with the first serving cell through the TDD-FDD CA scheme.

Abstract: Disclosed is a method and apparatus for processing an initialization for a D2D communication between user equipments (UEs). The method includes: determining D2D subframes available for a D2D communication, the D2D subframes including a first D2D subframe and a second D2D subframe, each of the first D2D subframe and the second D2D subframe including a D2D slot corresponding to D2D slot number 0; and at a start of the D2D slot of the first D2D subframe and at a start of the D2D slot of the second D2D subframe, processing an initialization associated with a pseudo-random sequence of a D2D communication. The first D2D subframe and the second D2D subframe each include a D2D slot corresponding to D2D slot number 1. At least one of the first D2D subframe and the second D2D subframe corresponds to a non-zero subframe number of a radio frame.

Abstract: An user equipment supporting Semi-Persistent Scheduling (SPS), the user equipment including: a receiver configure to receive sidelink (SL) SPS radio network temporary identifier (RNTI) from a base station; and receive a SL grant including downlink control information (DCI from the base station with a Physical Downlink Control Channel (PDCCH), wherein the DCI comprises a SL SPS index field and an activation/release indication field if the DCI with Cyclic Redundancy Check (CRC) is scrambled with the SL SPS RNTI, wherein a start subframe for Sidelink Control (SC) period is determined based on an offset value and a subframe in which the sidelink grant is received, and wherein an index of a subframe for SC period is relative to System Frame Number (SFN) 0.

Abstract: A method of controlling Semi-Persistent Scheduling (SPS) for a user device, including: receiving, by the user device, sidelink (SL) SPS radio network temporary identifier (RNTI) from a base station; and receiving, by the user device, a SL grant including downlink control information (DCI from the base station with a Physical Downlink Control Channel (PDCCH). The DCI includes a SL SPS index field and an activation/release indication field if the DCI with Cyclic Redundancy Check (CRC) is scrambled with the SL SPS RNTI. A start subframe for Sidelink Control (SC) period is determined based on an offset value and a subframe in which the sidelink grant is received, and an index of a subframe for SC period is relative to System Frame Number (SFN) 0.

Abstract: A method of controlling Semi-Persistent Scheduling (SPS) for a user device, including: receiving, by the user device, sidelink (SL) SPS radio network temporary identifier (RNTI) from a base station; and receiving, by the user device, a SL grant including downlink control information (DCI from the base station with a Physical Downlink Control Channel (PDCCH). The DCI includes a SL SPS index field and an activation/release indication field if the DCI with Cyclic Redundancy Check (CRC) is scrambled with the SL SPS RNTI. A start subframe for Sidelink Control (SC) period is determined based on an offset value and a subframe in which the sidelink grant is received, and an index of a subframe for SC period is relative to System Frame Number (SFN) 0.

Abstract: Disclosed is a method and apparatus for processing an initialization for a D2D communication between user equipments (UEs). The method includes: determining D2D subframes available for a D2D communication, the D2D subframes including a first D2D subframe and a second D2D subframe, each of the first D2D subframe and the second D2D subframe including a D2D slot corresponding to D2D slot number 0; and at a start of the D2D slot of the first D2D subframe and at a start of the D2D slot of the second D2D subframe, processing an initialization associated with a pseudo-random sequence of a D2D communication. The first D2D subframe and the second D2D subframe each include a D2D slot corresponding to D2D slot number 1. At least one of the first D2D subframe and the second D2D subframe corresponds to a non-zero subframe number of a radio frame.

Abstract: Disclosed is a method and apparatus for processing an initialization for a D2D communication between user equipments (UEs). The method includes: determining D2D subframes available for a D2D communication, the D2D subframes including a first D2D subframe and a second D2D subframe, each of the first D2D subframe and the second D2D subframe including a D2D slot corresponding to D2D slot number 0; and at a start of the D2D slot of the first D2D subframe and at a start of the D2D slot of the second D2D subframe, processing an initialization associated with a pseudo-random sequence of a D2D communication. The first D2D subframe and the second D2D subframe each include a D2D slot corresponding to D2D slot number 1. At least one of the first D2D subframe and the second D2D subframe corresponds to a non-zero subframe number of a radio frame.

Abstract: A communication system configures a plurality of sidelink (SL) Semi-Persistent Scheduling (SPS) for a user device. In some embodiments, a method includes generating, by a base station, SL SPS configuration information for the user device, wherein the SL SPS configuration information comprises: an SL SPS radio network temporary identifier (RNTI) for the user device; and SL SPS index information to indicate a plurality of SL SPS configurations for the user device. The method further includes configuring a radio resource control (RRC) message comprising the SL SPS configuration information and transmitting, by the base station and to the user device, the RRC message.

Abstract: Provided is a method and apparatus for controlling soft buffer for TDD-FDD carrier aggregation. The method includes: establishing a Radio Resource Control (RRC) connection with a base station through a first serving cell, the first serving cell supporting a Time Division Duplex (TDD) mode; receiving an RRC message from the base station through the first serving cell, the RRC message comprising carrier aggregation (CA) configuration information, the CA configuration information comprising information of a second serving cell supporting a Frequency Division Duplex (FDD) mode; determining a maximum number of DL HARQ processes for the second serving cell, the maximum number of DL HARQ processes for the second serving cell being differently determined according to a DL reference timing; and storing soft channel bits for a received transport block (TB) based on the determined maximum number of DL HARQ processes for the second serving cell.

Abstract: The present invention relates to an apparatus and method for controlling an uplink (UL) scheduling and Hybrid Automatic Repeat reQuest (HARQ) timing supported in a TDD-FDD CA environment. According to aspects of the present invention, in a TDD-FDD carrier aggregation deployment environment, an efficient UL scheduling/HARQ operation may be performed for a UE in which a cross-carrier scheduling is configured.

Abstract: Disclosed is a method of performing a Hybrid Automatic Repeat reQuest (HARQ) operation by a user equipment (UE), including: establishing a Radio Resource Control (RRC) connection with a base station through a first serving cell, the first serving cell supporting a Time Division Duplex (TDD) mode; receiving an RRC message from the base station through the first serving cell, the RRC message including carrier aggregation (CA) configuration information, the CA configuration information including information of a second serving cell supporting a Frequency Division Duplex (FDD) mode, and the first serving cell and the second serving cell being aggregated by a TDD-FDD CA scheme; and determining a maximum number of DL HARQ processes for the second serving cell based on a uplink (UL)/downlink (DL) configuration of the first serving cell when the second serving cell is a secondary serving cell (SCell) associated with the first serving cell through the TDD-FDD CA scheme.

Abstract: The present invention relates to an apparatus and method for controlling an uplink (UL) scheduling and Hybrid Automatic Repeat reQuest (HARQ) timing supported in a TDD-FDD CA environment. According to aspects of the present invention, in a TDD-FDD carrier aggregation deployment environment, an efficient UL scheduling/HARQ operation may be performed for a UE in which a cross-carrier scheduling is configured.

Abstract: Provided is an apparatus and method for performing activation/deactivation of a serving cell in a wireless communication system supporting dual connectivity. The method for performing activation/deactivation of serving cell by a user equipment in a wireless communication system includes configuring a dual connectivity with at least two different base stations based on dual connectivity configuration information received through RRC (Radio Resource Control) message from a base station, receiving activation/deactivation information about secondary serving cell configured for the UE from each of two different base stations, and selectively applying the activation/deactivation information about the secondary serving cell configured for the UE based on information including the secondary serving cell provided by the base station or information about the base station providing the secondary serving cell configured for the UE.

Abstract: Disclosed is a method and apparatus for processing an initialization for a D2D communication between user equipments (UEs). The method includes: determining D2D subframes available for a D2D communication, the D2D subframes including a first D2D subframe and a second D2D subframe, each of the first D2D subframe and the second D2D subframe including a D2D slot corresponding to D2D slot number 0; and at a start of the D2D slot of the first D2D subframe and at a start of the D2D slot of the second D2D subframe, processing an initialization associated with a pseudo-random sequence of a D2D communication. The first D2D subframe and the second D2D subframe each include a D2D slot corresponding to D2D slot number 1. At least one of the first D2D subframe and the second D2D subframe corresponds to a non-zero subframe number of a radio frame.

Abstract: The present invention relates to an apparatus and method for controlling an uplink (UL) scheduling and Hybrid Automatic Repeat reQuest (HARQ) timing supported in a TDD-FDD CA environment. According to aspects of the present invention, in a TDD-FDD carrier aggregation deployment environment, an efficient UL scheduling/HARQ operation may be performed for a UE in which a cross-carrier scheduling is configured.

Abstract: Provided is a method and apparatus for transmitting an HARQ ACK/NACK. The method includes: recognizing, from a PDCCH or an EPDCCH, a 2-bit uplink (UL) downlink assignment index (DAI) field configured in a UL downlink control information (DCI) format; receiving a PDSCH transmission through the second serving cell; generating an HARQ response signal based on the number of PDSCHs scheduled in the downlink subframes indicated by the UL DAI field and the number of total downlink subframes associated with one uplink subframe; and transmitting the HARQ response signal through a PUSCH in the one uplink subframe.

Abstract: Exemplary embodiments of the present invention relates to an apparatus and method for performing periodic CSI reporting available in a system supporting a TDD-FDD aggregation operation and an FDD-TDD aggregation operation. A periodicity and an offset for periodic reporting of channel quality indicator and precoding matrix inidcator may be determined based on the cell type of a primary serving cell for a TDD-FDD carrier aggregation and an FDD-TDD carrier aggregation.

Abstract: Provide is a method and apparatus for processing an initialization for a D2D communication between user equipments (UEs). The method includes: determining D2D subframes available for a D2D communication, the D2D subframes including a first D2D subframe and a second D2D subframe, each of the first D2D subframe and the second D2D subframe including a D2D slot corresponding to D2D slot number 0; and at a start of the D2D slot of the first D2D subframe and at a start of the D2D slot of the second D2D subframe, processing an initialization associated with a pseudo-random sequence of a D2D communication. The first D2D subframe and the second D2D subframe each include a D2D slot corresponding to D2D slot number 1. At least one of the first D2D subframe and the second D2D subframe corresponds to a non-zero subframe number of a radio frame.

Abstract: Provided is a method and apparatus for transmitting an HARQ ACK/NACK. The method includes: recognizing, from a PDCCH or an EPDCCH, a 2-bit uplink (UL) downlink assignment index (DAI) field configured in a UL downlink control information (DCI) format; receiving a PDSCH transmission through the second serving cell; generating an HARQ response signal based on the number of PDSCHs scheduled in the downlink subframes indicated by the UL DAI field and the number of total downlink subframes associated with one uplink subframe; and transmitting the HARQ response signal through a PUSCH in the one uplink subframe.