Embodiments include methods for a user equipment (UE) configured to operate in a radio access network (RAN). Such methods include obtaining data for transmission during a particular one of a plurality of periodic occasions during which the UE has been granted resources for uplink data transmission. The data includes first and second protocol data units (PDUs) associated with respective first and second hybrid ARQ (HARQ) processes. At least one of the first and second PDUs is for retransmission after failed transmission during an earlier one of the occasions. Such methods include selecting the first PDU or the second PDU for transmission during the particular occasion based on at least one of the following: priorities of logical channels with data included in the first and second PDUs. and whether one or both of the first and second PDUs are for retransmission. Other embodiments include complementary methods for a RAN node.

Aspects of the disclosure provide an apparatus for wireless communication. The apparatus includes a transceiver and a processing circuit. The transceiver is configured to transmit and receive wireless signals. The processing circuit is configured to detect an error of a previous scheduled transmission of data units from the apparatus to another apparatus. The other apparatus provides scheduled resources for transmission between the two apparatuses. Further, the processing circuit is configured to determine resources that are scheduled by the other apparatus for the apparatus to perform retransmission, and provide one or more of the data units in the previous scheduled transmission to the transceiver for retransmission using the scheduled resources.

Embodiments of the present invention relate to the communications field, and provide a multicast sending apparatus, a multicast receiving apparatus, and a multicast transmission determining method. The method includes: sending at least one multicast frame to multiple stations in a multicast manner; generating a multicast indication request frame, where the multicast request indication frame includes an identifier of the at least one multicast frame, the multicast indication request frame is used to instruct the multiple stations to send an indication frame within a specified timeslot in a unicast and contention-based manner, and the indication frame includes an identifier of a to-be-retransmitted multicast frame; and sending the multicast indication request frame to the multiple stations in a multicast manner.

A random access procedure control method and apparatus is provided for controlling a random access procedure efficiently in a mobile communication system supporting carrier aggregation. The method for controlling random access procedure of a terminal in a wireless communication system having a primary cell and at least one secondary cell includes initiating a random access procedure in the primary cell and the at least one secondary cells, detecting a random access failure of a terminal performing the random access procedure, determining whether the random access failure is detected in the primary cell or the at least one secondary cell, and determining whether to continue the random access procedure according to a result of the determining of whether the random access failure is detected.

A communication device for handling a HARQ process in a LAA SCell comprises a storage unit and a processing circuit configured to execute instructions stored in the storage unit. The instructions comprise receiving at least one UL grant from a network in a DL subframe, wherein a UL grant of the at least one UL grant schedules at least one PUSCH transmission associated with a UL HARQ process in at least one UL subframe, and a first timer and a second timer are associated with the UL HARQ process; starting the first timer in a first UL subframe of the at least one UL subframe, if the communication device is not able to perform a PUSCH transmission of the at least one PUSCH transmission in the first UL subframe; starting the second timer, when the first timer expires; and monitoring a PDCCH, when the second timer is running.

A method and apparatus for determination of a maximum number of uplink retransmissions in a wireless communication system is provided. A wireless device receives, from a network, information related to a first retransmission number for a first logical channel and second retransmission number for a second logical channel, determines a retransmission number of a data unit among the first retransmission number and the second retransmission number, and transmits, to the network, information for the retransmission number of the data unit.

A method and apparatus for dynamic configuration of a maximum number of sidelink retransmissions for a data unit in a wireless communication system is provided. A first wireless device in sidelink receives, from a network, information related to a first retransmission number for a first logical channel and a second retransmission number for a second logical channel. The first wireless device determines a retransmission number of a data unit among the first retransmission number and the second retransmission number, and performs sidelink transmission of the data unit to a second wireless device based on the retransmission number of the data unit.

The present disclosure relates to transmitting data over a physical uplink shared channel in a wireless communication system by using an asynchronous hybrid automatic repeat request, HARQ. An exemplary apparatus comprises a first timer configured to start upon uplink data transmission and stop after a first predetermined time; a second timer configured to start upon stop of the first timer and to stop after a second predetermined time; a receiver for receiving downlink control information including a positive acknowledgement for uplink new data transmission or retransmission, the receiver being configured to perform the receiving only when the first timer is stopped and the second timer is running, wherein the second timer is further configured to stop upon receiving the positive acknowledgement. Moreover, an apparatus for receiving the data and transmitting the control channel is provided as well as the corresponding transmitting and receiving method.

A wireless device receives message(s) comprising: configuration parameters for a periodic resource allocation indicating a first plurality of uplink resources of an uplink data channel of a cell; and offset parameter(s) for determining a number of UCI resources. A downlink control information is received comprising: an uplink grant indicating uplink radio resources of the uplink data channel of the cell; and an offset indicator value. A first transport block and first UCI(s) are transmitted via the uplink radio resources. The uplink radio resources comprise first resources of the first UCI(s). A first number of the first resources are determined based on the offset indicator value. A second transport block and second UCI(s) are transmitting via one of the first uplink resources. The one of the uplink resources comprise second resources of the second UCI(s). A second number of the second resources are determined based on the offset parameter(s).

A wireless device receives message(s) comprising: a first value for a downlink hybrid automatic repeat request (HARQ) round-trip-time (RTT) timer; and a second value for a downlink discontinuous reception (DRX) retransmission timer. A downlink control information indicating downlink transmission of a transport block is received. The downlink HARQ RTT timer is started with the first value in response to receiving the downlink control information. The first value indicates a first number of symbols. The downlink DRX retransmission timer is started with the second value in response to the downlink HARQ RTT timer expiring and the transport block not being successfully decoded. The second value indicates a second number of slot lengths. A downlink control channel is monitored while the downlink DRX retransmission timer is running.