Apparatus, methods, and computer-readable media for facilitating opportunistic CSI for sidelink communication are disclosed herein. An example method for wireless communication at a responding sidelink UE includes receiving, from an initiating sidelink UE, a request to provide CSI feedback to the initiating sidelink UE, the request excluding a CSI-RS. The example method also includes decoding a transmission from the initiating sidelink UE to a neighboring sidelink UE, the transmission including a CSI feedback trigger. The example method also includes transmitting, to the initiating sidelink UE, a CSI report based on the transmission.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving device may receive, from a transmitting device that is configured to perform network coding on information from an originating device, one or more transport blocks (TBs) including the information and associated with an erasure coding scheme. The receiving device may perform decoding using the erasure coding scheme and at least one TB, of the one or more TBs. The at least one TB is selected using one or more time conditions, one or more group conditions, one or more settings indicated by the transmitting device, or a combination thereof. Numerous other aspects are described.

A method and apparatus are disclosed for efficient hybrid automatic repeat request (HARQ) process utilization for semi-persistent and dynamic data transmissions, wherein a reserved HARQ process identification (ID) can be reused. A subset of a plurality of HARQ process IDs is reserved to use for a semi-persistent allocation, and data is transmitted based on the semi-persistent allocation. A dynamic allocation is received via a physical downlink control channel (PDCCH). At least one of the reserved HARQ process IDs is selectively used for transmitting data based on the dynamic allocation.

Methods, systems, and devices for wireless communications are described. In one example, a user equipment (UE) may be configured to receive a control message scheduling a multicast transmission, and the UE may identify an open loop power control parameter for transmitting acknowledgment feedback responsive to the multicast transmission. The identification of the open loop power control parameter may be based on the transmission being multicast to a plurality of UEs, and in some cases a UE may identify an open loop power control parameter that is different than an open loop power control parameter associated with feedback responsive to unicast transmissions. In various examples, open loop power control parameters may correspond to respective feedback resources (e.g., according to a configuration for a set of open loop power control parameters), or to respective physical resource indicators (e.g., as signaled in downlink control information).

An operation method of a first terminal in a communication system is provided. The method includes transmitting first SCI to a second terminal, the first SCI including one or more information elements among information indicating time resource(s) for sidelink communication, information indicating frequency resource(s) for the sidelink communication, information indicating a periodicity of physical resources for the sidelink communication, and information indicating an MCS for the sidelink communication. Second SCI is transmitted to the second terminal, the second SCI including information for an HARQ feedback operation and information indicating an NDI. The method further includes performing the sidelink communication with the second terminal based on the first SCI and the second SCI associated with the first SCI.

Techniques are disclosed relating to downlink control information for wireless communications. In some embodiments, the downlink control information includes code block group information that indicates which code block groups are transmitted and soft buffer handling information that indicates whether to flush previously-determined soft bits that correspond to one or more code block groups.

A resource assignment can be received. A first set of time-frequency resources in a subframe can be determined from the resource assignment. A second set of time-frequency resources in the subframe can be determined. The second set of time-frequency resources can be used for a second latency data transmission. The second set of time-frequency resources can overlap with at least a portion of the first set of time-frequency resources. A first latency data transmission in the subframe can be decoded based on the determined first and second set of time-frequency resources. The first latency transmission can have a longer latency than the second latency transmission.

A method of processing data includes: receiving, by a Packet Data Convergence Protocol (PDCP) layer, a PDCP Service Data Unit (SDU) from an upper layer; and deleting the PDCP SDU and a PDCP Packet Data Unit (PDU) corresponding to the PDCP SDU upon determining that a discard timer corresponding to the PDCP SDU is not expired and a preset condition is satisfied. The PDCP SDU is mapped to an Unacknowledged Mode (UM) or a Transparent Mode (TM) of a Radio Link Control (RLC) layer. Thus, the PDCP SDU will not reside in a UE cache, thereby reducing cache space occupied by the PDCP SDU.

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) operating in discontinuous reception (DRX) mode receives a DRX configuration, receives a reference signal resource configuration, determines, at least based on the DRX configuration and the reference signal resource configuration, whether an overlap exists between a reference signal occasion of a plurality of reference signal occasions of the reference signal resource configuration and an active time of the DRX configuration, receives or transmits at least based on a determined overlap, at least a first reference signal in the reference signal occasion, and receives or transmits, while remaining in an active state of the DRX configuration, at least based on the determined overlap, at least a second reference signal in remaining reference signal occasions of the plurality of reference signal occasions after expiration of the active time.

A user equipment (UE) and a base station (BS) for a mobile communication system are provided. The UE receives, from the BS, a first downlink control information (DCI) indicating a first uplink resource for transmitting a first uplink signal, and then receives, from the BS, a second DCI indicating a second uplink resource for transmitting a second uplink signal. The BS configures the second uplink resource to be advanced to the first uplink resource in the time domain based on the uplink out-of-order configuration. The UE decides the transmission of the first uplink signal according to the condition of resource configuration.