Abstract:
Methods, systems, and devices for wireless communications are described. A base station may identify an active transmission configuration indicator (TCI) state, a set of active TCI states, and/or a spatial relation reference signal identifier to be used for one or more component carriers (CCs) of a UE. The base station may then transmit a control message to the UE that may indicate the identified active TCI state, set of active TCI states, and/or spatial relation reference signal identifier to be used for one or more CCs and/or bandwidth parts of the UE. The UE may determine a communication configuration for a CC of the plurality of CC based on the control message and an optional shared command indication. The UE may the apply the TCI state or set of active TCI states to a subset of CCs, or UE may configure sounding reference signals for a subset of CCs.
Abstract:
Methods, systems, and devices for wireless communications are described. The described techniques provide for dynamic updates to beam failure detection (BFD) reference signals (RSs) and path loss RS using medium access control-control element (MAC-CE) or downlink control information (DCI). For example, the quasi co-location (QCL) of periodic CSI-RS may be dynamically updated by the MAC-CE or DCI when the periodic CSI-RS is for BFD RS. Also, a semi-persistent CSI-RS or aperiodic CSI-RS may act as a BFD RS. An enhanced update procedure may be used to update the path loss RS dynamically using MAC-CE or DCI. In some cases, the path loss RS parameters updated via MAC-CE or DCI may overwrite the previously RRC configured path loss RS parameters. In another example, if the path loss RS is not configured, then the path loss RS by default may be the spatial relation reference signal of the corresponding uplink beam.
Abstract:
Methods, systems, and devices for dynamic monitoring modes for synchronization signal block (SSB) transmissions are described. A user equipment (UE) may monitor one or more first SSB transmission opportunities for SSB transmissions from a base station and determine an SSB failure rate. Based on the failure rate, the UE may select a mode for monitoring one or more second SSB transmission opportunities. For example, if the failure rate is greater than a threshold, the UE may select a first mode for monitoring a first quantity of the one or more second SSB transmission opportunities. Additionally, if the failure rate is less than the threshold, the UE may select a second mode for monitoring a second quantity different than the first quantity of the one or more second SSB transmission opportunities. The UE may monitor the one or more second SSB transmission opportunities according to the selected mode for monitoring.
Abstract:
The present disclosure relates to resolving out-of-sync uplink grants for communication in an unlicensed spectrum. For example, a user equipment (UE) may receive an uplink grant from a network entity on a downlink communication channel, wherein the uplink grant is associated with a system frame number (SFN). The UE may further determine, based on the SFN, that the uplink grant is out of order with one or more stored uplink grants within a queue. Additionally, the UE may insert the uplink grant in an ordered position within the queue relative to the one or more stored uplink grants.
Abstract:
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a first grant to perform a first uplink transmission in a first subframe using a first component carrier. The UE may receive a second grant to perform a second uplink transmission in a second subframe adjacent the first subframe in time. The UE may determine to null one or more symbols of the uplink transmission in the first subframe based at least in part on the second grant. In some cases, the UE may determine to null the one or more symbols of the first uplink transmission is based at least in part on an availability of a single radio frequency (RF) frontend for use by the UE.
Abstract:
An apparatus operable in a communication system is described. The apparatus includes means for receiving a neighbor relation message from another apparatus. The apparatus also includes means for generating cluster information based on the neighbor relation message. The apparatus further includes means for transmitting the cluster information to the other apparatus.
Abstract:
A method of performing channel estimation includes receiving a frame that includes, for each subcarrier of a subset of subcarriers in the frame, a pair of pilot symbols in the subcarrier. The subcarriers of the subset are regularly spaced apart from one another in the frequency domain. Time-averaged channel estimates for each subcarrier of the subset are generated based on the pairs of pilot symbols. Frequency-averaged channel estimates for respective subcarriers are generated based on the time-averaged channel estimates. Interpolation is performed between respective frequency-averaged channel estimates to generate interpolated channel estimates for subcarriers between the respective subcarriers.
Abstract:
A coax network unit (CNU) receives a first plurality of orthogonal frequency-division multiplexing (OFDM) symbols from a coax line terminal (CLT). The first plurality of OFDM symbols includes continual pilot symbols on one or more subcarriers. The CNU also receives a grant from the CLT allocating a set of subcarriers within a second plurality of OFDM symbols to the CNU. The CNU transmits upstream to the CLT using the allocated set of subcarriers within the second plurality of OFDM symbols. When transmitting, the CNU places non-continual pilot symbols on regularly spaced subcarriers of the allocated set of subcarriers and does not place continual pilot symbols within the allocated set of subcarriers.
Abstract:
Techniques for the management, configuration, and control of network coded communications in a wireless network are disclosed herein. In one approach, there is provided an example method operable by an evolved Node B (eNB) or the like. The method may involve grouping a plurality of user equipments (UEs) into a network coding group. The method may involve associating the plurality of UEs in the network coding group with a network coding group identifier. The method may involve sending a data transmission for select UEs in the network coding group using the network coding group identifier. The data transmission may include additional downlink control information related to one or more of the UEs in the network coding group.
Abstract:
This disclosure relates to random access channel (RACH) enhancements for new radio unlicensed (NR-U) communications. Specifically, the present aspects include determining whether a gap length between a two-step random access channel (RACH) preamble transmission and a physical uplink shared channel (PUSCH) transmission satisfies a gap condition. The present aspects further include selecting a transmission procedure associated with the determined gap length for the PUSCH transmission. The present aspects further include performing the PUSCH transmission in accordance with the selected transmission procedure.