A wireless device transmits uplink data via a first configured grant resource of a first cell of a plurality of cells. The wireless device determines a second cell from the plurality of cells to transition from a dormant state to a non-dormant state, where the determining is based on the second cell being configured with a control resource set for receiving uplink grants for retransmission of the uplink data. In response to the transmitting, the wireless device transitions the second cell from the dormant state to the non-dormant state. The wireless device receives an uplink grant via the second cell, wherein the uplink grant indicates a radio resource. Based on the uplink grant, the wireless device retransmits the uplink data via the radio resource.

Wireless communications are described. A device may receive a message. The device may receive application data via a first cell group and a second cell group, and the device may transmit the application data to a communication device.

Systems and methods are described for streaming content to multiple devices from a shared sliding window buffer in kernel space, thereby reducing memory resource use and minimizing context/mode switching between kernel space and user space. For example, concurrent streaming sessions may be seen, e.g., as a live multimedia stream. If a live video is being transmitted as a multicast stream to many devices, rather than each device having a corresponding sliding window buffer in kernel space, each device will share a shared sliding buffer in kernel space. The sliding window buffer size will be at least large enough to stream the slowest connection speed and can be, e.g., multiple times as large as necessary, in case of the issues beyond the worst-case scenario. The system then transmits chunks of the content from the shared sliding window buffer to each of the plurality of client devices.

A loss correction encoding device having an improved capability of loss correction using LDPC-CC includes a rearranging unit that rearranges information data contained in n information packets according to the constraint length Kmax and the encoding rate (q−1)/q of a check polynomial of the loss correction code used in a loss correction encoding unit. Specifically, the rearranging unit rearranges the information data in such a way that continuous Kmax×(q−1) pieces of information data after rearrangement are contained in different information packets. The rearranging unit distributes the information data to information blocks from n information packets, where n satisfies the formula Kmax×(q−1)≤n.

A loss correction encoding device having an improved capability of loss correction using LDPC-CC includes a rearranging unit that rearranges information data contained in n information packets according to the constraint length Kmax and the encoding rate (q−1)/q of a check polynomial of the loss correction code used in a loss correction encoding unit. Specifically, the rearranging unit rearranges the information data in such a way that continuous Kmax×(q−1) pieces of information data after rearrangement are contained in different information packets. The rearranging unit distributes the information data to information blocks from n information packets, where n satisfies the formula Kmax×(q−1)≤n.

Wireless communications are described. A device may receive a message indicating a request for transmission of packets to a communication device. The device may receive the packets via a first cell group and a second cell group, and the device may transmit the packets to the communication device.

Embodiments herein relate to a method implemented by a wireless communication device. The wireless communication device transmits data to a radio node of a wireless communication network. The wireless communication device monitors for a positive acknowledgement or a negative acknowledgement of the data from the radio node. The wireless communication device retransmits the data to the radio node when said monitoring indicates reception of a negative acknowledgement of the data. The wireless communication device refrains from retransmitting the data to the radio node when said monitoring indicates reception of a positive acknowledgement of the data. The wireless communication device also refrains from retransmitting the data to the radio node when said monitoring indicates neither reception of a positive acknowledgement of the data nor reception of a negative acknowledgement of the data.

A communication apparatus includes a radio processing unit configured to transmit or receive a radio signal; and a control unit configured to control application of retransmission control in accordance with information indicating whether or not to apply the retransmission control, the information being included in a radio signal received from another communication apparatus via the radio processing unit.

A communication apparatus includes a radio processing unit configured to transmit or receive a radio signal; and a control unit configured to control application of retransmission control in accordance with information indicating whether or not to apply the retransmission control, the information being included in a radio signal received from another communication apparatus via the radio processing unit.

Methods and apparatuses are provided in a wireless communication system in which a radio resource control (RRC) message is received to change or release a secondary cell group (SCG). A re-establishment for a radio link control (RLC) entity of a terminal is performed based on the RRC message. A packet data convergence protocol (PDCP) data recovery is performed based on the RRC message. Performing the PDCP data recovery includes selectively transmitting a PDCP protocol data unit (PDU) previously submitted to the re-established RLC entity, for which a successful delivery has not been confirmed by the re-established RLC entity.