Abstract: There is provided a terminal device which communicates with a base station apparatus. The terminal device includes a reception unit that decodes a downlink control channel (PDCCH) or an enhanced downlink control channel (EPDCCH) including a downlink control information (DCI) format. A field of a downlink assignment index (DAI) is provided in the DCI format for a TDD operation, in a case of a time division duplex (TDD) primary cell. The field of the DAI is not provided in the DCI format for the TDD operation, in a case of a frequency division duplex (FDD) primary cell.

Abstract: A base station device and a terminal device efficiently communicate with each other by using a PDSCH. The base station device and the terminal device determine a starting position of an OFDM symbol for a PDSCH in a serving cell based on a transmission mode relating to transmission of the PDSCH, a DCI format that is used for allocation of the PDSCH, an antenna port that is used for the transmission of the PDSCH, and a higher-layer parameter that is determined from a parameter set for a serving cell in which the PDSCH is received.

Abstract: An evolved NodeB (eNB) for transmitting signals in a Licensed-Assisted Access (LAA) serving cell is described. The eNB includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to perform carrier sensing at least in a minimum clear channel assessment (MCCA) slot. A subframe includes N baseline MCCA timeslots, where N is a positive integer. The MCCA slot includes one of the baseline MCCA timeslots.

Abstract: A user equipment (UE) is described. The UE includes a higher layer processor configured to acquire a first dedicated radio resource control (RRC) configuration and a second dedicated RRC configuration. The first dedicated RRC configuration specifies a configuration of a first physical downlink control channel (PDCCH) which indicates a slot format. The second dedicated RRC configuration specifies a configuration of repetition of a physical uplink shared channel (PUSCH). The UE also includes PDCCH receiving circuitry configured to monitor the first PDCCH. The UE further includes PUSCH transmitting circuitry configured to transmit the PUSCH with the repetition. In a case that the first PDCCH indicates that a symbol for the PUSCH in a slot is other than either downlink or uplink, the PUSCH is not transmitted in the slot and the PUSCH in the slot is counted as one of the repetition.

Abstract: A user equipment (UE) is described. The UE includes receiving circuitry configured to receive a radio resource control message including first information used for indicating a periodicity. The receiving circuitry is also configured to receive on a physical downlink control channel (PDCCH), downlink control information (DCI) with CRC scrambled by a first Radio Network Temporary Identifier (RNTI), the DCI including information indicating a time domain resource. The UE also includes transmitting circuitry configured to perform, based on the DCI with CRC scrambled by the first RNTI, a transmission on a physical uplink shared channel (PUSCH) in a symbol. The time domain resource includes an index of the symbol in which the transmission on the PUSCH is performed and a slot offset value. The index of the symbol in which the transmission on the PUSCH is performed is within a slot given by the first information and the slot offset value.

Abstract: In one of its aspects the technology disclosed herein concerns a communications system comprising an access node (22) and a wireless terminal (26). A wireless terminal comprises receiver circuitry and processor circuitry. The receiver circuitry receives wireless communications over an air interface from a radio access network. The processor circuitry changes from using a first periodicity to using a second periodicity to detect a synchronization signal included in the received wireless communications.

Abstract: A user equipment (UE) is described. The UE includes a higher layer processor configured to receive an RRC message for enhanced resource element group (EREG) configuration. The UE also includes a physical downlink control channel receiver configured to monitor an enhanced physical downlink control channel (EPDCCH) on the basis of a first EREG structure if the EREG configuration is not established, and to monitor the EPDCCH on the basis of a second EREG structure if the EREG configuration is established. All resource elements (REs) with number i in a physical resource block (PRB) pair comprise EREG number i.

Abstract: Provided is a terminal that performs communication with a base station, in which, in a case where a physical downlink control channel is monitored in a first enhanced physical downlink control channel-physical resource block set, a demodulation reference signal is used that is based on a scrambling sequence which is initialized by a prescribed parameter, and in which, in a case where the physical downlink control channel is monitored in a second enhanced physical downlink control channel-physical resource block set, a demodulation reference signal is used that is based on a scrambling sequence which is initialized by a parameter that is set individually for each terminal.

Abstract: A number of times to repeat a PDCCH over a plurality of subframes is set, a downlink assignment and information including a parameter that indicates an MBSFN subframe are received, and on the basis of whether the number of times to repeat the PDCCH is set, a determination is made as to whether the downlink assignment can take place in the MBSFN subframe indicated by the parameter.

Abstract: A terminal device includes a transmission unit that transmits HARQ response information to a first serving cell and a second serving cell on a physical uplink shared channel in a subframe. The physical uplink shared channel is transmitted based on a physical downlink control channel or an enhanced physical downlink control channel which is detected in a state of including a downlink control information format 0/4. Two or more serving cells are configured in the terminal device, in a case where frame constitution types of any two configured serving cells are different from each other, and in a case where a primary cell has Frame constitution type 2, BcDL is applied to the first serving cell of Frame constitution type 2 by using a first following expression, and is applied to the second serving cell of Frame constitution type 1 by using a second expression.

Abstract: It is possible to efficiently transmit and receive signals including control information between a base station apparatus and a mobile station apparatus. A control channel is constituted of one or more first elements. The mobile station apparatus sets a search space for performing decoding detection of the control channel within a control channel region in which each of the first elements is constituted of resources in one physical resource block, and a search space for performing decoding detection of the control channel within a control channel region in which each of the first elements is constituted of second elements in a plurality of different physical resource blocks. Each of the second elements is resources obtained by dividing one physical resource block. The mobile station apparatus performs decoding detection of the control channel using the first elements in the set search spaces.

Abstract: It is possible to efficiently transmit and receive signals including control information between a base station apparatus and a mobile station apparatus. A control channel is constituted of one or more first elements. The mobile station apparatus sets a search space for performing decoding detection of the control channel within a control channel region in which each of the first elements is constituted of resources in one physical resource block, and a search space for performing decoding detection of the control channel within a control channel region in which each of the first elements is constituted of second elements in a plurality of different physical resource blocks. Each of the second elements is resources obtained by dividing one physical resource block. The mobile station apparatus performs decoding detection of the control channel using the first elements in the set search spaces.

Abstract: A communication system that includes a terminal apparatus and a base station apparatus. The terminal apparatus transfers terminal capability information to the base station apparatus, whereby the terminal capability information indicating whether the terminal apparatus supports a PDSCH transmission mode with 4 or more CSI reference signal ports. The terminal apparatus reports a channel state information computed from a channel measurement, whereby the channel measurement in the PDSCH transmission mode with 4 or more CSI reference signal ports is based on only CSI-RS.

Abstract: A user equipment (UE) is described. The UE receives, from a base station apparatus, a radio resource control message including first information used for configuring a number of repetitions for transmission of a transport block. The UE also receives, from the base station apparatus, a radio resource control message including second information used for configuring a pattern of redundancy version for the repetitions for the transmission of the transport block. The pattern of the redundancy version is any one of a first pattern and a second pattern. The UE also performs, based on the first information and the second information, to the base station apparatus, the repetition for the transmission of the transport block. The same redundancy version used for the repetitions for the transmission for the transport block is a redundancy version “zero.

Abstract: A user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to determine the uplink control channel (PUCCH) format and configuration based on a signaling from a gNB. The instructions are also executable to determine the control channel used for uplink control information (UCI) feedback. The instructions are further executable to determine the resource of the control channel for UCI feedback. The instructions are additionally executable to transmit UCI on the selected channel. A long PUCCH may employ a format that includes a waveform, a number of resource blocks (RBs), a reference symbol (RS) pattern, and/or orthogonal sequences on RS and data symbols, and/or one or more control resource regions.

Abstract: A user equipment (UE) is described. The UE receives downlink signals including, at least, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The UE also receives an index for a plurality of occasions for a PRACH. Each of the plurality of occasions for the PRACH are associated with each of the downlink signals including, at least, the PSS and the SSS. The UE further receives information for a plurality of groups of random access preambles. The UE additionally selects a random access preamble from a set of random access preambles in a group of the random access preambles. The UE also determines, based on the received downlink signals including, at least, the PSS and the SSS, an occasion for the PRACH from the plurality of occasions for the PRACH. The UE further transmits the selected random access preamble using the determined occasion for the PRACH.

Abstract: A user equipment (UE) is described. The UE includes a higher layer processor which is configured to acquire a dedicated Radio Resource Control (RRC) message. The UE also includes physical downlink control channel (PDCCH) receiving circuitry configured to monitor a PDCCH with a downlink control information (DCI) format which is used for scheduling of a physical downlink shared channel (PDSCH). The DCI format includes a time domain resource assignment field of which value indicates a timing of the PDSCH. The value is one of multiple possible values defined in a table. The multiple possible values include at least a first value and a second value. The first value is a predefined fixed value. The second value is configured by the dedicated RRC message.

Abstract: An access node comprises node processor circuitry and a node transmitter. The node processor circuitry is configured to generate plural types of synchronization signal blocks for at least partially interspersed transmission over a radio interface. Each synchronization signal block type comprises a unique combination of differing types of information. The node transmitter circuitry configured to at least partially intersperse transmission of the plural types of synchronization signal blocks over the radio interface to at least one wireless terminal. The wireless terminal comprises a terminal receiver and terminal processor circuitry. The terminal receiver is configured to receive, in at least partially interspersed manner, synchronization signal blocks of differing types over a radio interface from an access node. The terminal processor circuitry is configured determine to which of plural types of synchronization signal blocks a received synchronization signal block belongs.

Abstract: A user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to acquire a first higher layer configuration indicating multiple sets of physical uplink control channel (PUCCH) resources, the multiple sets of PUCCH resources including at least a short PUCCH resource. The instructions are also executable to select a PUCCH resource from the sets of PUCCH resources. The instructions are further executable to transmit uplink control information (UCI) on the selected PUCCH resource.

Abstract: There is provided a terminal for performing OFDM (Orthogonal Frequency-Division Multiplexing) communication with a base station forming a cell. The terminal includes a control channel processing unit configured to monitor, in a sub-frame, a first control channel in a cell-specific search space that is a search space common within the cell, and a first control channel in a UE-specific search space that is a search space specific to the terminal. In a case where monitoring of a second control channel different from the first control channel that is in the cell-specific search space or the UE-specific search space is configured, the control channel processing unit monitors, in a sub-frame, at least both the first control channel in the cell-specific search space and the second control channel in the UE-specific search space.