Disclosed in the present application are a data transmission method and a communication device. The method includes: obtaining transmission parameters for transmitting a transport block, wherein the transmission parameters comprise Modulation and Coding Scheme (MCS), a Physical Resource Block (PRB) number, and PRB resource overhead information; determining a Transport Block Size (TBS) for the transport block according to the transmission parameters; and transmitting the transport block or receiving the transport block according to the TBS; wherein the PRB resource overhead information is determined based on at least one of: Demodulation Reference Signal (DMRS), Channel State Information-Reference Signals (CSI-RS), and control channel information.

Methods, systems, and devices for sidelink wireless communications are described in which a transmitting device may determine a transport block size (TBS) for a sidelink data channel transmission and provide an indication in in sidelink control information (SCI) to allow a receiving device to determine the TBS to be used for decoding the sidelink communication. The indication provided in the SCI may be an explicit indication in an information element that indicates whether feedback channel resources are included or excluded when determining a number of symbols for use in a TBS determination. The indication provided in the SCI may also be an implicit indication based on one or more values of one or more parameters provided in the SCI. The sidelink communications devices may determine a same TBS across multiple instances of a sidelink data channel transmission that may be transmitted using slots having different slot formats.

In a wireless network, a frame structure may include a padding duration at the start of every half subframe to ensure that an integer number of symbols fit within a duration of the half subframe. In some aspects, to avoid wasting time domain resources, the padding duration may be utilized for other purposes. For example, because a single carrier waveform is not bound to a fixed Fast Fourier Transform size, a wireless node may use the padding duration to transmit a single carrier symbol that has a shorter length than a full symbol associated with a subcarrier spacing. Additionally, or alternatively, in cases where a wireless node is configured to transmit or receive a signal in a first symbol of a half subframe that is associated with a different power level than a preceding symbol, the padding duration may be used to adapt a transmit power or a receive gain.

A method for reference signal transmission, a method for reference signal reception, and an apparatus for communication are provided. The method includes: transmitting, by a first communication node, one or more reference signals to a second communication node in N bundled and continuous time units, where N is an integer greater than 1.

A method performed by a first RAN node of an integrated access and backhaul, IAB, wireless communication network. The first RAN node is connected to a core network and is arranged for wireless communication with a second RAN node and with a number of UEs. Wireless communication resources are allocated for communication between the first RAN node and the second RAN node. The method includes assigning a first part of the resources for transmission of first data and a second part for transmission of second data between the first RAN node and the second RAN node, obtaining information of a vacant part of the resources, and triggering transmission of the first data and the second data using at least a fraction of the vacant part of the wireless communication resources for at least one of the first data and the second data.

A terminal includes a control unit that calculates a size of a transport block (TBS) to be transmitted on a Physical Sidelink Shared Channel

(PSSCH) by applying a TBS determination method in a case where a Physical Sidelink Control Channel (PSCCH) and the PSSCH are to be frequency division multiplexed in a portion of a time resource of the PSSCH; and a transmitting unit that transmits the PSCCH and the PSSCH.

Latency reduction techniques for radio access networks are described. In various embodiments, a reduced transmission time interval (rTTI) may be implemented in order to reduce air interface latency in a radio access network. In some embodiments, an rTTI block may be defined, and some operations may be performed in rTTI block-wise fashion in order to reduce the marginal overhead associated with implementation of the rTTI. In various embodiments in which an rTTI is implemented, DM-RS granularity may be improved by use of techniques that enable data and reference signals to be multiplexed within a same OFDM symbol. In some embodiments, a current transmission time interval (TTI) may be maintained, and latency reduction may be achieved via the use of novel techniques for one or more of code block (CB) segmentation, uplink (UL) resource element (RE) mapping, and HARQ cycle timing. Other embodiments are described and claimed.

Provided are a data communication processing method and device. The method includes: acquiring a modulation order and a target code rate; calculating an intermediate number N.sub.info of information bits at least according to a total number of resource elements, the modulation order and the target code rate; quantizing the intermediate number N.sub.info of the information bits to obtain the quantized intermediate number N′.sub.info; determining a transport block size (TBS) according to the quantized intermediate number N′.sub.info.

Method, systems and devices for determining a transport block size (TBS) are disclosed. The method comprises determining the TBS based on a parameter or a signaling associated with an event of determining an intermediate value of a TBS determination procedure, wherein the parameter or a signaling is available for a wireless terminal supporting a release version, wherein the intermediate value is determined based on a plurality of resource parameters, wherein the plurality of resource parameters comprises at least one of the total number of resource elements allocated to the wireless terminal, a rate , a modulation order, and the number of layers.

According to one aspect of the disclosure, in a communication apparatus at a transmission end, a packet train that is input is grouped to generate a duplicate packet for each packet group. For each packet group, encoded packets are generated using some packets in a group of duplication source packets and other packets in a group of duplicate packets that do not correspond to the some packets in the group of duplication source packets, and above-described other packets in the duplication source, some packets in the group of duplicate packets that are not used to generate the encoded packets, and the above-described encoded packets are transmitted. On the other hand, in a second communication apparatus at a reception end, the some packets in the group of duplication source packets and the other packets in the group of duplicate packets are decoded based on, among the received packets described above, either the other packets in the group of duplication source packets or the above-described some packets in the group of duplicate packets, and the encoded packets, and when some packets of the packet group are lost in a network, the above-described lost packets are restored by the above-described decoded packets.