Abstract: A substrate that includes a core layer comprising a first surface and a second surface, a plurality of core interconnects located in the core layer, a high-density interconnect portion located in the core layer, a first dielectric layer coupled to the first surface of the core layer, a first plurality of interconnects located in the first dielectric layer, a second dielectric layer coupled to the second surface of the core layer, and a second plurality of interconnects located in the second dielectric layer. The high-density interconnect portion includes a first redistribution dielectric layer and a first plurality of high-density interconnects located in the first redistribution dielectric layer. The high-density interconnect portion may provide high-density interconnects.

Abstract: The apparatus receives a first PDU and a first CRC that is based on the first PDU. The first PDU is encrypted based on a first nonce. The apparatus decrypts the first PDU to obtain a first payload and a first cipher stream. The apparatus soft combines the decrypted first payload with a decrypted set of payloads. The set of payloads have been encrypted based on at least one nonce different than the first nonce. The apparatus generates a second CRC based on the soft combined decrypted payloads and based on the first cipher stream. The apparatus determines whether the generated second CRC for the soft combined decrypted payloads passes a CRC check against the first CRC.

Abstract: Techniques and apparatus for transmitting control information to maintain hybrid automatic repeat request (HARQ) processes for multiple carriers in different frequency ranges, such as frequency range 1 (FR1) and frequency range 2 (FR2), in carrier aggregation scenarios are described. A first numerology of a first component carrier (CC) in FR1 and a second numerology of a second CC in FR2 are determined. A HARQ configuration that includes an indication of a set of physical uplink control channel (PUCCH) resources is determined. A number of symbols of the set of PUCCH resources is based on the first numerology and the second numerology. The HARQ configuration is transmitted to a user equipment (UE). HARQ feedback is transmitted on the first CC for data received on the second CC, using the set of PUCCH resources of the HARQ configuration.

Abstract: Wireless communications systems and methods related to performing subband-based random access and/or subband-based scheduling request in a network are provided. A first wireless communication device receives a communication configuration indicating one or more subbands for transmitting a signal including at least one of a random access preamble sequence or a scheduling request. The first wireless communication device performs a clear channel assessment (CCA) on each subband of the one or more subbands. The first wireless communication device transmits the signal using at least one subband of the one or more subbands based on a result of the CCA.

Abstract: Methods, systems, and devices for wireless communications are described. A communication device, such as a user equipment (UE) may monitor a pre-wakeup window during an inactive duration of a multicast discontinuous reception (DRX) cycle that includes multiple active durations and multiple inactive durations. The UE may receive, in the pre-wakeup window, a wakeup signal that indicates a quantity of the active durations in the multicast DRX cycle that the UE is to monitor and the UE may monitor the indicated quantity of active durations for multicast signals for the UE.

Abstract: Techniques for wireless communication are described. A method for wireless communication at a user equipment (UE) includes identifying a physical uplink shared channel (PUSCH) to transmit in an uplink pilot time slot (UpPTS) of a subframe, determining whether to transmit uplink control information (UCI) on the PUSCH in the UpPTS, and transmitting the PUSCH in the UpPTS based at least in part on the determining. A method for wireless communication at a network access device includes determining whether to schedule a transmission of UCI on a PUSCH in a UpPTS of a subframe, scheduling the PUSCH in the UpPTS based at least in part on the determining, and transmitting, to a UE, scheduling information for the PUSCH in the UpPTS.

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for advertising operating channels that are being operated in an unlicensed frequency band. One or more access points (APs) may transmit discovery information on a dedicated discovery channel for the unlicensed frequency band. The discovery information may indicate at least one operating channel that is being used by an AP for providing wireless access. The discovery information also may include other information useful for a station (STA) to discover APs, operating channels, and operating parameters. The STA may monitor the dedicated discovery channel to obtain the discovery information without conducting an active scanning or passive scanning procedure.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may transmit, using a frequency-domain beam sweeping configuration, a wideband signal, wherein a pointing direction of a first beam conveying the wideband signal changes continuously with respect to a frequency domain, and wherein each resource element of the wideband signal has a different pointing direction. The transmitter device may receive a report associated with a set of measurements of the wideband signal performed by a receiver device. The transmitter device may communicate using a second beam that has a beam direction determined based at least in part on the received report. Numerous other aspects are described.

Abstract: Integrated circuit (IC) packages employing front side back-end-of-line (FS-BEOL) to back side back-end-of-line (BS-BEOL) stacking for three-dimensional (3D) die stacking. To facilitate providing additional electrical routing paths for die-to-die interconnections between stacked IC dice in the IC package, a BS-BEOL metallization structure of a first die of the stacked dice of the IC package is stacked adjacent to a FS-BEOL metallization structure of a second die of the stacked IC dice. Electrical routing paths for die-to-die interconnections between the stacked IC dice are provided from the BS-BEOL metallization structure of the first die to the FS-BEOL metallization structure of the second die. It may be more feasible to form shorter electrical routing paths in the thinner BS-BEOL metallization structure than in a FS-BEM metallization structure for lower-resistance and/or lower-capacitance die-to-die interconnections for faster and/or compatible performance of semiconductor devices in the IC dice.

Abstract: Certain aspects of the present disclosure provide techniques for user equipment (UE) autonomous sidelink resource selection. A method that may be performed by a UE includes performing autonomous sidelink resource selection. The selection includes excluding resources, from a first resource set, associated with transmissions at a signal strength above a signal strength threshold to form a second resource set. The selection includes determining a resource amount in the second resource set is at or above a threshold percentage of a resource amount in the first resource set. The selection includes excluding, from the second resource set, resources associated with physical sidelink control channels (PSCCHs) without excluding resources associated with physical sidelink shared channels associated with the PSCCHs to form a third resource set. The selection includes randomly selecting resources for a PSCCH transmission from the third resource set.

Abstract: Methods, systems, and devices for wireless communications are described. According to one or more aspects, a user equipment (UE) may identify, for a set of time periods associated with a reference signal associated with a physical downlink shared channel, an overlap between a first set of frequency resources allocated for the reference signal and a second set of frequency resources that are scheduled to puncture the first set of resources and that are unavailable for scheduling on the physical downlink shared channel. The UE may determine a remaining set of frequency resources from the first set of frequency resources based on the overlap, and a subset of frequency resources from the remaining set of frequency resources based on a reference signal processing configuration. The UE may then process the reference signal in the subset of frequency resources based on the reference signal processing configuration.

Abstract: A method of wireless communication, the method including: communicating, by a first wireless communication device with a second wireless communication device, communication signals using a first beam; detecting a failure of the first beam; in response to the failure of the first beam, determining that the first beam is associated with a first beam recovery group of a plurality of beam recovery groups; transmitting a beam failure recovery signal to the second wireless communication device based on determining that the first beam is associated with the first beam recovery group; and communicating, by the first wireless communication device with the second wireless communication device, the communication signals at least in part using a second beam.

Abstract: Certain aspects of the present disclosure generally relate to an embedded trace substrate (ETS) with one or more passive components embedded therein. Such an ETS may provide shorter routing, smaller loop area, and lower parasitics between a semiconductor die and a land-side passive component embedded in the ETS. One example embedded trace substrate generally includes a core, a first insulating material disposed above the core and having a first metal pattern embedded therein, a second insulating material disposed below the core and having a second metal pattern embedded therein, and one or more passive components embedded in the core.

Abstract: Aspects described herein relate to determining symbols over which to transmit repetitions for certain types of communications. A resource grant can include information for transmitting a number of repetitions over a collection of resources, such as a starting symbol over which to transmit communications, a number of symbols over which to transmit communications, and/or a nominal number of repetitions to transmit. Where time division multiplexing (TDM) communications are configured, a slot format indicator (SFI) can be semi-statically or dynamically configured and can indicate a communication direction of symbols within one or more slots as being uplink, downlink, or flexible. Thus, mapping uplink communications to the symbols may be based on additional considerations.

Abstract: Disclosed are various techniques for wireless communication. In one aspect, a user equipment (UE) may receive, from a satellite vehicle (SV), a signal of a first frequency band, estimate a first ionospheric delay residual error based on the signal of the first frequency band, calculate a first pseudorange measurement and a first carrier phase measurement based on the first ionospheric delay residual error, and estimate a position using the first pseudorange measurement and the first carrier phase measurement. In some aspects, the ionospheric delay residual error is estimated via a Klobuchar equation. In some aspects, the position is estimated using ultra-long baseline real-time kinematics (RTK) positioning.

Abstract: Methods, systems, and devices for wireless communications are described. Beam pair link (BPLs) may be associated with a state of a wireless device. For example, a first wireless device may communicate with a second wireless device using a set of BPLs, and the second wireless device may operate using a predetermined movement sequence, where different movements may correspond to the second wireless device using respective states. In some examples, a BPL may be selected for each state of the second wireless device and used to communicate with the first wireless device, where the BPL that corresponds to a particular state may be determined through beam training procedures. In some cases, BPLs associated with respective states may experience decreased link quality and the first wireless device may transmit a configuration that modifies the communications between the first and second wireless devices based on the affected BPLs.

Abstract: Methods, systems, and devices for wireless communications are described. The methods include determining a sidelink message to transmit to a second user equipment (UE) over a time resource of a sidelink connection between a first UE and the second UE, encoding at least a subset of time periods of the time resource according to a configuration that is based on a switching time for the second UE for switching from a receiving mode to a transmitting mode during reception of the sidelink message during at least the subset of time periods of the time resource, and transmitting the sidelink message to the second UE using a set of time periods of the time resource that includes the subset of time periods.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may encapsulate, into a link layer sidelink management message, upper layer signaling for managing a direct communication connection with a second UE. The first UE may transmit, to the second UE, the link layer sidelink management message including the upper layer signaling. The second UE may selectively transmit, to the first UE, a link layer sidelink response message based at least in part on a content of the upper layer signaling in the link layer sidelink management message. Numerous other aspects are provided.

Abstract: Various embodiments include methods and devices for timer failure detection and recovery. The embodiments may include running a plurality of timers in parallel, including a first operation timer, a first monitor timer, and a second monitor timer each having an independent time base, determining whether a first timer of the plurality of timers fails, removing the first timer from use in response to determining that the first timer fails, determining whether the first timer has a consistent difference in independent time base with a second timer of the plurality of timers, and returning the timer to use with a time adjustment in response to determining that the first timer has a consistent difference in independent time base with the second timer.

Abstract: Disclosed are techniques for handling collisions between multiple radio resource control (RRC) connection establishment procedures for multiple connection events, such as mobile terminating pages and tracking area updates.