A wireless device receives a downlink grant for reception of a transport block associated with a first downlink hybrid automatic repeat request (HARQ) process of a cell. A downlink HARQ round-trip-time timer of the first downlink HARQ process of the cell is started in response to receiving the downlink grant. The starting the downlink HARQ round-trip-time timer increases a number of running downlink HARQ round-trip-time timers of downlink HARQ processes of the cell to a first number. Monitoring of a control channel for the cell is stopped in response to the first number being equal to a second number.

A terminal device and a base station device efficiently communicate with each other. The terminal device includes a transmission unit configured to repeatedly transmit uplink control information including at least one CQI using a plurality of PUCCHs in a plurality of subframes, in a case where uplink control information is transmitted in the PUCCH in an initial subframe included in the plurality of subframes, based on whether the uplink control information includes an HARQ-ACK, (i) the uplink control information is transmitted using the PUCCH in a first subframe included in the plurality of subframes, or (ii) the uplink control information is not transmitted in the first subframe included in the plurality of subframes.

A method for starting a discontinuous reception (DRX) timer is performed by a terminal, and includes: starting the DRX timer according to a transmission type of at least one of an uplink transmission or a downlink transmission.

Systems and methods for adapting a timer(s) for a satellite-based radio access network are disclosed. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device comprises obtaining a value to be used to offset, extend, and/or scale one or more timers related to the satellite-based radio access network relative to values for non-satellite-based radio access networks. The method further comprises utilizing the value to offset a start of one or more timers, extend one or more timers, and/or scale one or more timers and performing one or more actions based on the one or more offset timers, the one or more extended timers, and/or the one or more scaled timers. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.

Proposed are a method by which a first device performs wireless communication, and an apparatus supporting same. The method may comprise the steps of: acquiring an SL DRX configuration including an SL DRX inactivity timer, an SL DRX HARQ RTT timer, and an SL DRX retransmission timer, receiving, from a second device through a first PSCCH, first SCI for scheduling of a first PSSCH and second SCI; and receiving the second SCI and a first MAC PDU from the second device through the first PSSCH. For example, the first device may start the SL DRX inactivity timer. For example, the first device may transmit SL HARQ feedback information to the second device through a PSFCH on a PSFCH resource determined on the basis of a slot index and a sub-channel index related to the first PSSCH. For example, the first device may restart the SL DRX inactivity timer after the PSFCH resource on the basis of the second SCI being related to a groupcast.

This application relates to a discontinuous reception method. In the first time unit, for example, the first symbol, after a hybrid automatic repeat request HARQ feedback occasion of a sidelink HARQ process, a first terminal may start a drx-HARQ-RTT-TimerSL and start a drx-RetransmissionTimerSL when the drx-HARQ-RTT-TimerSL expires. During running of the drx-RetransmissionTimerSL, the first terminal monitors a physical downlink control channel. In this way, sidelink retransmission efficiency can be improved, an increase of a sidelink retransmission delay can be avoided, and sidelink-based applications, such as unmanned driving, automatic driving, assisted driving, intelligent driving, networked driving, intelligent networked driving, and car sharing in the field of artificial intelligence can be better supported.

Provided is a communication device including: a response request determination unit that determines whether a response request is included, from content of a transmission frame; a transmission unit that carries out processing to transmit a frame; a timer that starts to measure a time period after transmission processing is completed; a reception state determination unit that determines whether a response frame is being received when a first time period is measured; a communication processing deciding unit that decides that the time period to be measured by the timer is to be extended by a second time period in when it has been determined that the response frame is being received, and decides that predetermined processing is to be carried out when it has been determined that the response frame is not being received; and a response reception check unit that checks whether the response frame is being received correctly.

A transmission device includes a first control unit and a signal transmission unit. The first control unit outputs transmission data. The signal transmission unit receives transmission data, converts the data to a first frequency signal and a second frequency signal, and transmits the signals. The reception device includes a signal reception unit and a second control unit. The signal reception unit outputs a first reception signal based on the first frequency signal, and outputs a second reception signal based on the second frequency signal. The second control unit outputs a first control signal in a case where at least one the first reception signal or the second reception signal includes the transmission data. A communication system includes a transmission device and a reception device. A remote operating device includes an input unit, a transmission device, a reception device, and a controlled unit.

Systems and methods for buffer-aware transmission rate control for real-time video streaming are disclosed herein. An example method includes transmitting a first video packet at a transmission rate based on a buffer fill ratio of a buffer, where the transmission rate is adjusted in response to changes of the buffer fill ratio, selectively retransmitting a second video packet in response to a negative acknowledgement packet, where selectively retransmitting the second video packet is at least based on whether the second video packet has been previously retransmitted, a buffer level of the buffer, and a retransmission rate, and selectively retransmitting a third video packet in response to a non-receipt of an acknowledgement packet within a retransmission timeout, wherein selectively retransmitting the third video packet is at least based on whether the third video packet has been previously retransmitted, the buffer level of the buffer, and the retransmission rate.

A method and apparatus for managing multiple Timing Advance Groups (TAGs) operating with different timings are provided for use in a Long Term Evolution (LTE) system. The method for managing multiple TAGs at a base station of a wireless communication system supporting carrier aggregation according to an exemplary embodiment of the present invention includes categorizing a plurality of carriers into at least one TAG according to a predetermined rule, assigning a TAG index to each TAG, transmitting the TAG index to a terminal, generating a Timing Advance Command (TAC) for synchronization, and transmitting the TAC to the terminal in a random access process. The method and apparatus for managing TAGs according to exemplary embodiments of the present invention is capable of informing of the timing advance group to which each carrier belongs and managing multiple timing advance groups efficiently without signaling overhead.