Abstract: Apparatuses, methods, and systems are disclosed for performing a two-step random access channel procedure. One method includes determining whether to perform a two-step random access channel procedure or a four-step random access channel procedure. The method includes, in response to determining to perform the two-step random access channel procedure: in a first step: transmitting a preamble in a first time slot; and transmitting an uplink data transmission via a physical uplink shared channel in a second time slot different from the first time slot; and, in a second step, receiving a response message corresponding to the first step, wherein the response message comprises a radio network temporary identifier.

Abstract: This invention relates to a proposal of an uplink resource assignment format and a downlink resource assignment format. Furthermore, the invention relates to the use of the new uplink/downlink resource assignments in methods for (de)activation of downlink component carrier(s) configured for a mobile terminal, a base station and a mobile terminal. To enable efficient and robust (de)activation of component carriers, while minimizing the signaling overhead, the invention proposes a new uplink/downlink resource assignment format that allow the activation/deactivation of individual downlink component carriers configured for a mobile. The new uplink or downlink resource assignment comprises an indication of the activation state of the configured downlink component carriers, i.e., indicate which downlink component carrier(s) is/are to be activated or deactivated.

Abstract: Apparatuses, methods, and systems are disclosed for supporting a mixture of BR and HFBT. One apparatus (600) includes a processor (605) that provides a physical (“PHY”) layer (255) and a Medium Access Control (“MAC”) layer (260) and a transceiver (625) that communicates on a sidelink channel. The processor (605) determines (805) a minimum time duration between a first resource for HARQ transmission of the transport block (“TB”) and a second resource for HARQ transmission of the TB. Here, the minimum time duration comprises a sum of: a first time to receive HARQ feedback, a second time to determine whether to perform retransmissions of the TB, and a third time to retransmit the TB. The processor (605) selects (810) a retransmission mode based on the minimum time duration and selects (815) sidelink resources for retransmission of the TB based on the selected retransmission mode.

Abstract: The present invention relates to a method for configuring a retransmission protocol on the uplink between a network node and a relay node in a mobile communication system, the configuration being performed at a network node or at a relay node, and to the corresponding relay node apparatus and network node apparatus capable of configuring the retransmission protocol. In particular, the number of transmission processes is determined based on the position of time intervals available for the transmission and may be selected in order to control the round trip time of the retransmission protocol. Once the number of transmission processes has been configured, the transmission processes are mapped on the available time intervals in a predefined order and repetitively.

Abstract: The present disclosure relates to transmitting and receiving of system information which includes controlling the transmission and/or the reception to transmit and/or receive system information including a coverage enhancement level indication for indicating enhanced coverage levels supported by the wireless communication system and to transmit and/or receive system information including a group of information elements common for different coverage enhancement levels and information elements specific for different coverage enhancement levels grouped for respective coverage enhancement levels.

Abstract: Apparatuses, methods, and systems are disclosed for transmitting data using unlicensed spectrum. One apparatus includes a memory comprising instructions executable by a processor to cause the apparatus to receive a single DCI comprising a grant for multiple transmission occasions and to perform a first LBT procedure for transmission of a first TB associated with a first transmission occasion of the grant, where the first LBT procedure results in LBT failure and where the first TB is associated with a first HARQ process. The instructions are further executable by the processor to cause the apparatus to transmit the first TB during a second transmission occasion of the grant associated with a second HARQ process in response to the first LBT procedure resulting in LBT failure.

Abstract: Apparatuses, methods, and systems are disclosed for power headroom report generation. One method includes aggregating multiple serving cells. The method includes determining that a power headroom report is triggered. The method includes receiving, at a first time after the power headroom report is triggered, a first uplink grant that allocates resources for a new transmission on a serving cell of the multiple serving cells. The method includes determining a power headroom value for each serving cell of the multiple serving cells being activated based on information received prior to and including the first time. The method includes generating a power headroom report medium access control control element including at least the power headroom value for each serving cell of the multiple serving cells being activated.

Abstract: For routing Packet Data Converge Protocol (PDCP) Protocol Data Units (PDU), a processor detects a split bearer configuration for a mobile device. In response to detecting the split bearer configuration, the processor routes PDCP PDU in a Radio Link Control (RLC)/Medium Access Control (MAC) for the at least two cell groups.

Abstract: Apparatuses, methods, and systems are disclosed for sending and/or receiving feedback for a system information request. One apparatus includes a transmitter that transmits information indicating a request for system information. The apparatus includes a processor that monitors, during a predetermined time period, for a feedback response indicating that the request for the system information was received.

Abstract: Apparatuses, methods, and systems are disclosed for transmitting a physical downlink shared channel after losing uplink synchronization. One method includes: transmitting first downlink control information that schedules a physical downlink control channel order; transmitting second downlink control information that schedules a physical downlink shared channel transmission; transmitting the physical downlink control channel order based on the first downlink control information; transmitting the physical downlink shared channel transmission based on the second downlink control information, wherein the physical downlink control channel order and at least a portion of the physical downlink shared channel transmission are transmitted after a remote unit loses an uplink synchronization and before the remote unit completes a physical random access channel procedure.

Abstract: A method and apparatus are provided, in which a configuration including a number of symbols for delaying monitoring a physical downlink control channel (PDCCH) in a search space set associated with each of at least one type of physical random access channel (PRACH) occasions is determined (202). A PRACH preamble is transmitted (204) in a PRACH occasion for an identified type of PRACH occasion. In response to the transmission of the PRACH preamble in the PRACH, the PDCCH is monitored (206) for a random access response in the search space set associated with a control resource set (CORESET) during a window, wherein the window starts at a first symbol of the earliest CORESET that the user equipment is configured to receive the PDCCH that is at least the configured number of symbols for the identified type of PRACH occasion after the last symbol of the PRACH occasion.

Abstract: An operation mode from a plurality of operation modes can be determined (310) based on at least one traffic type originated from a UE. The plurality of operation modes can include at least one group operation mode and an individual operation mode. The at least one group operation mode can support a plurality of UEs grouped into a group of UEs. The at least one group operation mode can support at least one network entity communicating associated messages with the group of UEs including the UE. The associated messages can be associated with the group of UEs. A network entity can be informed (320) of the determined operation mode.

Abstract: The invention relates to an improved radio resource allocation performed by a vehicular mobile terminal. The vehicular mobile terminal determines whether to determine radio resources based on the location of the vehicular mobile terminal or not, based on information received from an entity of the communication system. In case the radio resources are to be selected based on the location of the vehicular mobile terminal, the vehicular mobile terminal determines the location of the vehicular mobile terminal, and determines radio resources for communication with at least the second mobile terminal, based on the determined location of the vehicular mobile terminal.

Abstract: Apparatuses, methods, and systems are disclosed for combined blind and feedback based retransmissions. One method (500) includes determining (502), for a first logical channel, a number of blind retransmissions to perform in a blind retransmission mode. The method (500) includes performing (504), by the first logical channel, the number of blind retransmissions in the blind retransmission mode. The method (500) includes, in response to performing the number of blind retransmission in the blind retransmission mode, switching (506), for the first logical channel, from the blind retransmission mode to a feedback based retransmission mode. The method (500) includes performing (508), by the first logical channel, one or more feedback based retransmissions in the feedback based retransmission mode.

Abstract: Apparatuses, methods, and systems are disclosed for efficiently transmitting a SR. One apparatus includes a memory comprising instructions executable by a processor to cause the apparatus to trigger a buffer status report for a first logical channel and trigger a SR for the first logical channel based at least in part on the triggered buffer status report. The instructions are executable by the processor to cause the apparatus determine whether a SR configuration associated with the first logical channel is configured with a set of PUCCH resources for a transmission of a SR on a current active BWP and initiate a RACH procedure for requesting uplink resources if the SR configuration associated with the first logical channel is not configured with the set of PUCCH resources for the transmission of the SR on the current active BWP.

Abstract: A user equipment includes circuitry which selects a random access preamble sequence, and a transmitter which transmits the random access preamble sequence to a base station in a frequency bandwidth of an unlicensed band, and performs at least one of a first operation and a second operation. In the first operation, the circuitry selects a first sequence as the random access preamble sequence, the first sequence having a length longer than a length of a random preamble sequence used for a licensed band, and the transmitter transmits the first sequence in the frequency bandwidth of the unlicensed band. In the second operation, the circuitry selects a second sequence as the random access preamble sequence, the second sequence having a length equal to the length of a random preamble sequence used for the licensed band, and the transmitter transmits the second sequence with repetitions in the frequency bandwidth of the unlicensed band.

Abstract: A first configuration of a first set of random access channel occasions can be transmitted in a handover command message from a first cell. A second configuration of a second set of random access channel occasions of a second cell can be transmitted. The second set of random access channel occasions can be different from the first set of random access channel occasions. System information of the second cell can include the second configuration of the second set of random access channel occasions. A random access channel preamble can be received on a random access channel occasion. At least one selected from the first set of random access channel occasions and the second set of random access channel occasions can include the random access channel occasion. The first cell can be different from the second cell.

Abstract: Apparatuses, methods, and systems are disclosed for determining linked bandwidth parts. One method includes determining that a plurality of bandwidth parts is activated. The method includes determining that a scheduling resource is configured on the plurality of bandwidth parts, semi-persistent scheduling is configured on the plurality of bandwidth parts, or a combination thereof. The method includes determining a bandwidth part of the plurality of bandwidth parts to use for an uplink transmission.

Abstract: A self-contained operation using a time-unit configuration taking into consideration HARQ processes is performed. In base station, transmission section transmits a downlink signal in a downlink transmission region in a time unit composed of the downlink transmission region, an uplink transmission region, and a gap interval that is a switching point from the downlink transmission region to the uplink transmission region; and reception section receives an uplink signal in the uplink transmission region in the time unit. Each time unit includes the downlink transmission region and the uplink transmission region for each of HARQ processes.

Abstract: The present disclosure relates to a method for paging coverage extension UEs in a cell controlled by a radio base station. At least one CE-specific paging possibility is defined for paging CE-UEs. The CE-UEs in the cell regularly monitor the at least one CE-specific paging possibility. When the radio base station determines to page all the user equipments in the cell, it pages the CE user equipments in the cell at the CE-specific paging possibility, using a coverage extension technique. The disclosure also relates to a method for paging a CE-UE, which performs radio measurements by a CE-capable user equipment to determine whether coverage extension is necessary. The radio base station is informed about whether the CE-capable user equipment needs coverage extension and then pages the CE-UEs applying or not applying a CE technique depending on whether coverage extension is necessary.