This application provides a data transmission method and an apparatus. In the provided method, network coding-based data transmission is introduced, and adaptive adjustment is performed on HARQ retransmission and network coding-based transmission based on a data reception status or channel quality.

A method and system to improve the link budget of a wireless system using fast Hybrid Automatic Repeat Request (HARQ) protocol. In one embodiment of the invention, the Medium Access Control (MAC) logic in a base station determines whether the quality of the communication link with a mobile station is bad. When the MAC logic in the base station determines that the quality is bad, the base station uses a fast Hybrid Automatic Repeat Request (HARQ) protocol to indicate to the mobile station to send identical information to the base station in each of a plurality of successive or consecutive communication intervals before processing any received identical information from the mobile station. The fast HARQ protocol reduces the latency of receiving the identical information correctly, as compared with the current HARQ protocol.

A receiver receives and processes a data signal having at least one data signal block. The data signal block has a number of symbols in the time domain and a number of sub-carriers in the frequency domain. The data signal block includes a control region to provide control data to the receiver and a payload region to provide payload data to the receiver. Payload data is allocated to the control region of the data signal block.

A terminal according to an aspect of the present disclosure includes a transmission section that transmits, when a delivery acknowledgement signal (HARQ-ACK) collides with another UL transmission, the UL transmission, a reception section that receives downlink control information including information related to retransmission of the HARQ-ACK, and a control section that controls retransmission of the HARQ-ACK using a resource notified by the downlink control information.

Aspects of the disclosure relate to maintaining, defining, configuring and implementing a coverage enhancement mode defined for radio access network. A base station may maintain parameters that define multiple coverage enhancement modes in a lookup table and may select a first coverage enhancement mode from the two or more coverage enhancement modes for use with a first user equipment to accommodate use of one or more carrier frequencies, time or frequency duplexing mode, cell size, capabilities of the first user equipment or a channel measurements report of the first user equipment, and schedule a set of control and data channels to be used for communicating with the first user equipment using a first transmission scheme defined by first parameters associated with the first coverage enhancement mode. The set of control and data channels may include uplink control and data channels and downlink control and data channels.

Apparatuses, methods, and systems are disclosed for selective retransmission of groupcast data. One apparatus includes a transceiver that transmits groupcast data via sidelink communication to a set of UEs and receives negative acknowledgement feedback via sidelink communication from at least one UE of the set, the negative acknowledgement feedback indicating unsuccessful reception of the groupcast data. The apparatus includes a processor that determines a retransmission mode based on a number of UEs sending negative acknowledgement feedback and controls the transceiver to send selectively beamformed retransmission of the groupcast data according to the determined retransmission mode.

A transmission station (STA) of a wireless local area network system, according to various embodiments, may configure a plurality of blocks for encoding. The plurality of blocks may each comprise a data block and a CRC block for detecting an error of the data block. The transmission STA encodes each of the plurality of blocks and may transmit the plurality of encoded blocks.

A wireless device receives configuration parameters indicating PDCCH skipping durations. The wireless device may receive a DCI indicating PDCCH monitoring skipping for a first duration of the durations. The wireless device may transmit a random access preamble. The wireless device may ignore the PDCCH monitoring skipping and may monitor the PDCCH during a random access response window in response to transmitting the random access preamble.

A method for information feedback and related devices are provided. The method includes the following. A terminal receives preset information from a network device, where the preset information at least includes point-to-multipoint (PTM) transmission information. The terminal feeds back HARQ response information of the preset information to the network device, where the HARQ response information includes HARQ response information of the PTM transmission information.

A data transmission method includes receiving policy information transmitted by a core network device and related to a Protocol Data Unit (PDU) session, the policy information instructing transmission delay monitoring to be performed on data sub-packets obtained by splitting a data packet of an interactive service. The method further includes, in response to identifying that a data packet transmitted by a previous node is one of the data sub-packets obtained by splitting the data packet of the interactive service, detecting, according to the policy information in a process of transmitting the data sub-packets to a subsequent node, whether transmission of the data sub-packets meets a delay requirement. The method further includes, in response to detecting that the transmission of the data sub-packets does not meet the delay requirement, stopping transmitting remaining data sub-packets obtained by splitting the data packet of the interactive service to the subsequent node.