A wireless communication system, which supports enhanced dedicated channel (E-DCH) data transmissions, includes a wireless transmit/receive unit (WTRU), at least one Node-B and a radio network controller (RNC). The WTRU includes a buffer, a data lifespan timer, a data retransmission counter, a hybrid-automatic repeat request (H-ARQ) process and a controller. The timer establishes a lifespan for at least one data block stored in the buffer. If physical resources have not been allocated for a data block associated with a lifespan timer that is close to expiration, the WTRU sends an urgent channel allocation request. If physical resources have been allocated, the data block is prioritized for transmission with respect to other data blocks. The data block is discarded if the lifespan timer expires or if the WTRU receives feedback information indicating that the data block was successfully received by the Node-B.

Disclosed is a geo-networking transmission method of a V2X communication apparatus. The geo-networking transmission method according to an embodiment of the present disclosure includes receiving a geo-networking packet; identifying whether the received geo-networking packet is a packet which is prestored in a buffer; determining whether to perform a forwarding progress of the geo-networking packet, when the received geo-networking packet is not a prestored packet; storing the received geo-networking packet in the buffer and starting a timer, when the forwarding progress is determined; and transmitting the geo-networking packet, when the timer expires.

A wireless device comprises one or more processors and memory storing instructions. When executed by the one or more processors, the instructions cause the wireless device to receive messages comprising a downlink hybrid automatic repeat request (HARQ) round-trip-time (RTT) timer value expressed in units of symbols and a downlink discontinuous reception (DRX) retransmission timer value expressed in units of slot lengths, receive a downlink control information indicating downlink transmission of a transport block, start a downlink HARQ RTT timer with the downlink HARQ RTT timer value in response to receiving the downlink control information, start a downlink DRX retransmission timer with the downlink DRX retransmission timer value in response to the downlink HARQ RTT timer expiring and the transport block not being successfully decoded, and monitor a downlink control channel while the downlink DRX retransmission timer is running.

Communication between a cellular network (102) and a communication device (101) occurs in a first frequency band (111) and a second frequency band (112), 102 the second frequency band (112) being at least partly different from the first frequency band (111). A data packet is sent in the first frequency band (111). Depending on an acknowledgment of receipt of the data packet, the data packet is selectively sent in the second frequency band (112).

Wireless communication systems and methods related to utilizing two-stage grants for uplink communications with discontinuous reception (DRX) operations are provided. In some aspects, a user equipment (UE) receive, from a base station (BS), a first downlink control information (DCI) message scheduling an uplink (UL) data transmission, the first DCI message indicating a first value for an UL schedule timing indicator. The UE activates a timer based at least in part on the first value of the UL schedule timing indicator. The UE monitors a downlink control channel based at least in part on the timer. The UE receives, from the BS, a second DCI message indicating UL schedule timing for the UL data transmission based at least in part on the monitoring.

Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a transmitting device may be configured to transmit a transport block in a set of transmission time intervals (TTIs) of a repetition window to improve the chances that the transport block is received by a receiving device. In some cases, however, the transport block may not be available to be transmitted in the repetition window until after a first TTI of the repetition window. In such cases, a transmitting device may use the techniques described herein to identify appropriate configurations for transmitting the transport block in the repetition window. For example, the transmitting device may identify an adjusted redundancy version sequence to use for transmitting the transport block in the repetition window or the transmitting device may adjust a repetition window based on a TTI in which the transport block is available to be transmitted.

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.

Some embodiments of the present disclosure provide a DRX parameter configuration method, a DRX processing method, a network node, and a user equipment. The DRX parameter configuration method is applied in the network node and includes: determining (101) one or more service types corresponding to a User Equipment (UE) based on the characteristic information of the UE; configuring (102) a DRX parameter for each of the one or more service types; and transmitting (103) the DRX parameter to the UE. With the embodiments of the present disclosure, requirements of data transmission under different application scenes can be met.

Various solutions for autonomous retransmission on configured grant with respect to user equipment and network apparatus in mobile communications are described. An apparatus may start a first timer and a second timer when a transmission is performed on a hybrid automatic repeat request (HARQ) process configured for a configured grant. The apparatus may perform an autonomous retransmission using the configured grant when the second timer is expired. The apparatus may cancel restart of the first timer when the autonomous retransmission is performed. The apparatus may restart the second timer when the autonomous retransmission is performed. The apparatus may stop the second timer when the first timer expires. The apparatus may stop the second timer at the activation of a type 2 configured grant.

A method and device for discontinuous reception are provided, and can further reduce a power consumption of a terminal device in a DRX process. The method includes: detecting, by a terminal device, a wakeup signal in a first time period; starting a drx-onDurationTimer in a DRX cycle after the first time period if the terminal device detects the wakeup signal; and/or, not starting the drx-onDurationTimer in the DRX cycle after the first time period if the terminal device does not detect the wakeup signal.