Abstract: A method for wireless communication performed by a user equipment (UE) includes receiving, from a network device, an initial transmission parameter that indicates whether a network coding function is enabled for initial transmissions from a first radio link control (RLC) entity associated with a multicast radio bearer (MRB) of a network device and a retransmission parameter that indicates whether the network coding function is enabled for retransmissions from a second RLC entity associated with the MRB. The method also includes receiving a set of initial data units from the first RLC entity. The method further includes receiving, from the second RLC entity, a set of retransmission data units based on transmitting status indicators that indicate the set of initial data units satisfy a failure condition.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a message indicating a common pool of resources for a random access channel (RACH). The UE may initiate a random access by transmitting, to the base station, a first RACH preamble in a RACH occasion within a subset of the common pool of resources. The subset is selected based at least in part on a use case that triggered the random access. In some aspects, the UE may transmit an initial RACH preamble and/or a RACH pay load in order to activate the subset. As an alternative, the UE may transmit an initial RACH preamble and/or a RACH payload in order to receive an indication of the subset for the use case that triggered the random access. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for indicating a user equipment capability or service. A method that may be performed by a user equipment (UE) includes transmitting, to a network entity, an indication of at least one of a capability of the UE or a service for the UE in a random access channel (RACH) procedure and communicating with the network entity in accordance with the indication.

Abstract: Methods, systems, and devices for power backoff techniques for modulation schemes are described. A user equipment (UE) may receive an indication of a constellation distribution parameter and a modulation scheme to be used by the UE for an uplink message on an uplink channel. The UE may determine an uplink transmission power based at least in part on the indicated constellation distribution parameter and the indicated modulation scheme. The UE may transmit the uplink message using the indicated modulation scheme according to the determined uplink transmission power. In some examples, the UE may transmit a report indicating a power headroom parameter and an output power parameter based at least in part on the constellation distribution parameter.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, information that configures multiple random access channel (RACH) partitions, wherein the multiple RACH partitions are each associated with a respective combination of one or more RACH features. The UE may select, from the multiple RACH partitions, a RACH partition based at least in part on the UE satisfying one or more criteria for the combination of one or more RACH features associated with the RACH partition. The UE may transmit, to the base station, a preamble on physical RACH (PRACH) resources associated with the RACH partition to initiate a RACH procedure supporting the combination of one or more RACH features associated with the RACH partition. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a wireless device may In use non-uniformly distributed bits for amplitude mapping and uniformly distributed bits for sign mapping to support probabilistic constellation shaping (PCS) for transmission of a message. To provide a coding gain with one or more retransmissions of the message, the device may configure redundancy versions based on the non-uniform distribution of one or more symbols. In some examples, the device may include the same set of non-uniformly distributed systematic bits or at least a portion of non-uniformly distributed systematic bits in each redundancy version of the message. Additionally or alternatively, the device may use multiple modulation and coding scheme (MCS) values to modulate one or more of the redundancy versions, where a first MCS value is used to modulate non-uniformly distributed symbols and a second MCS value is used to modulate uniformly distributed symbols.

Abstract: Apparatus, methods, and computer-readable media for network coding for handover are disclosed herein. A base station (BS) transmits a first group of encoded packets to a first road side unit (RSU) over a first radio access network (RAN) interface. The BS initiates a handover procedure between the first RSU and a second RSU. The BS receives, from the first RSU, a release acknowledgment associated with the handover procedure and feedback associated with the first group of encoded packets. The BS transmits network coding level information to the second RSU over a second RAN interface based on the feedback. The network coding level information indicates a number of missing encoded packets within the first group of encoded packets for the second RSU to transmit to the UE. The BS transmits, to the UE, a second group of encoded packets associated with the number of missing encoded packets at the second RSU.