A random access method, a base station, an UE and a device with a storage function are disclosed. The random access method includes: the base station receiving a first message transmitted by the UE, the first message including a preamble message and a signal message; decoding the preamble message and the signal message respectively; if the decoding of preamble message is succeeded, but the decoding of signal message fails, the base station transmits a second message to the UE, and storing the signal message of decoding failure, the second message configured to request the UE to retransmit the signal message; receiving the third message transmitted by the UE, the third message including the signal message; using a chase combine mechanism to decode the third message according to the stored signal message in the first message. The present disclosure save time and improve the efficiency of random access.

Methods and apparatus are described herein for improved efficiency of a wireless transmit/receive unit (WTRU) transmitting transport blocks (TBs). A WTRU may receive configuration information including uplink resources associated with one or more repetition bundles and a target number of retransmissions for a transport block (TB) associated with at least one hybrid automatic repeat request (HARQ) process. Then, the WTRU may transmit a first TB using a first uplink resource in a first repetition bundle based on the configuration information. Further, the WTRU may increment a retransmission counter. On a condition that the retransmission counter is less than the target number of retransmissions, the WTRU may determine a second uplink resource. Further, the WTRU may retransmit the first TB in the determined second uplink resource. Also, the WTRU may further increment the retransmission counter. Moreover, the first, second and third uplink resources may be physical uplink shared channel (PUSCH) resources.

A method performed by a Wireless Transmit/Receive Unit (WTRU) includes receiving a plurality of scheduling configurations indexed as a sequence for a hybrid automatic repeat request (HARQ) process, receiving a non-unicast downlink transmission from a node on a radio access network, wherein the non-unicast downlink transmission contains an information unit processed in accordance with a first scheduling configuration of the plurality of scheduling configurations, detecting errored reception of the information unit, determining a presence of at least a second scheduling configuration associated with the HARQ process, requesting retransmission of the information unit, and receiving a subsequent retransmission of the information unit using the second scheduling configuration.

A receiver receives a radio signal from a transmitter of a wireless communication system serving a plurality of receivers. The radio signal includes for the plurality of receivers served by the transmitter a plurality of control messages and a redundant control message for at least one of the control messages. The receiver detects a control message from the radio signal, and, responsive to detecting the control message, the receiver detects a signal from another location in the radio signal. The receiver determines the detected control message as a specific control message for the receiver based on the signal detected from the other location.

The present disclosure relates to an electronic device, a communication method and a storage medium in a wireless communication system. There is provided an electronic device for a transmitter, comprising a processing circuitry configured to: perform an initial transmission and blind transmissions of a transport block to a receiver by a configured Hybrid Automatic Repeat reQuest (HARQ) process, the blind transmissions being planned to be performed within a predetermined time window after the initial transmission; perform detection for a HARQ feedback from the receiver, the HARQ feedback indicating whether decoding for the transport block at the receiver is successful or not; and control to cancel or continue the blind transmissions based on a result of the detection.

Technology for a user equipment (UE) operable for configured grant uplink (UL) transmission in new radio unlicensed (NR-U) is disclosed. The apparatus can comprise one or more processors. The one or more processors can be configured to select, at the UE, a hybrid automatic repeat request process identifier (HARQ process ID) from a set of HARQ IDs. The one or more processors can be configured to insert the HARQ process ID into uplink control information (UCI) on a physical uplink shared channel (PUSCH). The one or more processors can be configured to encode, at the UE, the UCI for transmission to a next generation node B (gNB) via a configured grant uplink transmission using the HARQ process ID.

A test transmission can be used to train and/or select a signal. For example, a cellular network can configure a receiver with a recommended receiver signal sweeping pattern for mobile devices. A transmitter device can duplicate a data packet transmission and send it to a receiver device to ensure that the receiver can receive the duplicated packets from different signals. Consequently, the duplicated data packet can be indicated in the associated control channel so that the receiver is aware that the data packet is a duplicated transmission, and based on this info and configuration data, the receiver can select a more favorable signal.

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.

The data collection management device (10) is connected via a network to a plurality of communication devices (20) performing cyclic communication and includes: a network configuration storage (17) to store network configuration information indicating the communication devices participating in the cyclic communication; a data receiving unit (11) to receive communication data multicast from each communication device (20); a received data storage (12) to store the received communication data as collected data; a received data determination unit (13) to determine whether there is missing data in the collected data and identify unreceived communication data, based on information specifying communication cycles included in the collected data, on information specifying sender communication devices included in the collected data, and on network configuration information; and a retransmission requesting unit (15) to transmit a retransmission request of the unreceived communication data to one of the plurality of communication devices (20).

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). Disclosed is a method by a base station for use in a non-terrestrial network (NTN) comprising: transmitting one of a predetermined number of re-transmissions including a packet in a blind re-transmission mode to an user equipment (UE); receiving a channel quality indicator (CQI) message after the transmission; in response to a particular configuration of the received CQI message, terminating transmission of any remaining of the predetermined number of re-transmissions.