Example embodiments of the present disclosure relate to an apparatus, method and computer readable storage medium for determining active time with a plurality of discontinuous reception (DRX) groups. In example embodiments, if first transmission is initiated from a device, at least a first DRX group is selected from a plurality of DRX groups. The plurality of DRX groups is configured for the device and associated with a plurality of DRX configurations. The apparatus is further caused to determine first active time for the first DRX group based on a first DRX configuration of the plurality of DRX configurations associated with the first DRX group. Further, the device is allowed to monitor second transmission to the device in the first active time.

Control information may be used to schedule communications between a wireless device and a base station. The wireless device may monitor control channels associated with one or more cells to receive the control information.

Certain aspects of the present disclosure provide techniques for handling acknowledgement and retransmission timers during sidelink discontinuous reception (DRX) communication. An example method by a transmitter user equipment (UE) generally includes transmitting a first repetition of a physical sidelink shared channel (PSSCH) to a receiver UE prior to entering an inactive state, while the transmitter UE is operating in a sidelink discontinuous reception (DRX) mode; returning to an active state to monitor for acknowledgment feedback from the receiver UE, wherein the return is based on a first timer relative to an end of the first repetition of the PSSCH; remaining in the active state for a duration defined by a second timer; and taking one or more actions depending on whether the transmitter UE receives acknowledgment feedback during the duration indicating failed reception of the first repetition of the PSSCH by the receiver UE.

A method in a user equipment (UE) (110) is disclosed. The method comprises obtaining (701) one or more radio link monitoring configurations, each radio link monitoring configuration associated with at least one bandwidth part. The method comprises determining (702) that the UE is to switch from a source bandwidth part to a target bandwidth part. The method comprises performing (703) radio link monitoring on the target bandwidth part according to an obtained radio link monitoring configuration associated with the target bandwidth part.

A method for timer management in a radio link control (RLC) layer in a wireless communication system is provided. The method includes activating, by an RLC entity, a timer at first time, in response to receiving a first set of data packets from at least one user equipment (UE) in an RLC receiving window and deactivating, by the RLC entity, the timer at second time, in response to receiving a second set of data packets from the at least one UE in the RLC receiving window. Further, the method includes determining, by the RLC entity, whether there is at least one missing data packet in the RLC receiving window, and reactivating the timer and prohibiting generation of a status report, in response to determining that there is the at least one missing data packet, or generating the status report, if there is no the at least one missing data packet.

Certain aspects of the present disclosure provide techniques for A method for wireless communication by a user equipment (UE), comprising initiating a timer upon reception of a first segmented packet of a plurality of packets of an RLC physical data unit (PDU) at radio link control (RLC) layer, resetting the timer when a packet data convergence protocol (PDCP) layer receives an RLC PDU from the RLC layer, and upon expiry of the timer, initiating a radio recourse control (RRC) connection reestablishment (RRE) procedure with a network.

A user equipment for a mobile communication network is provided. The mobile communication network has a radio access network including a plurality of cells and being configured to serve the user equipment within a cell. To receive a data packet from the radio access network, the user equipment is configured to receive a plurality of different versions of the data packet transmitted by the radio access network to the user equipment in parallel via different physical resources. To provide a data packet to the radio access network, the user equipment is configured to provide a plurality of different versions of the data packet and to transmit the plurality of different versions of the data packet to the radio access network in parallel via different physical resources.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.

Methods and systems for controlling timers in LTE networks. UE configures a length of the at least one timer, configure at least one start position for the at least one timer, wherein the start position is aligned with a starting subframe of a physical downlink control channel (PDCCH) search space and started when a previous transmission is completed; and stopping, by the UE, the at least one timer when a PDCCH is successfully decoded.

A user equipment (UE) receives receiving discontinuous reception (DRX) configuration information including information indicating subframes for the start of an on-duration timer and a value of the on-duration timer. The UE starts the on-duration timer in a subframe n based on the DRX configuration information if a hybrid automatic repeat request (HARQ) round trip time (RTT) timer is not running. The UE monitors a physical downlink control channel (PDCCH) to receive downlink control information while the on-duration timer is running.

Embodiments of the disclosure generally relate to determining configuration of a DRX timer. A wireless device determines a relationship between a DRX timer and different scheduling units and determines a time unit of the DRX timer based on the determined relationship. Then, the wireless device calculates a time interval indicated by the DRX timer based on the time unit.