Abstract:
Methods, systems, and devices for wireless communications are described to reduce interference caused by power leakage. A first user equipment (UE) or a base station may select communication resources for a sidelink communication based on a distance between UEs reserving frequency resources in a same time window. The first UE or the base station may determine a distance parameter between the first UE and one or more other UEs (e.g., including a second UE) reserving frequency resources within the time window. The distance parameter may represent a physical distance between the first and second UEs or a reference signal received power of the second UE as received by the first UE. The first UE or the base station may select communication resources based on whether the distance parameter is below a threshold, and the first UE may communicate the sidelink communication using the selected resources.
Abstract:
Systems and methods for communicating in a wireless network using a first radio access technology (RAT) and an assisting RAT are disclosed. A first connection can be established with an access point using the first RAT, and a second connection can be established with the access point using the assisting RAT. A timing of the first connection can be synchronized based at least in part on a timeline of the assisting RAT. Communications with the access point over at least the first connection can be based at least in part on the synchronized timing.
Abstract:
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive coordination information for sidelink communication in a distributed scheduling mode. The UE may select, in the distributed scheduling mode, a value for a sidelink communication parameter based at least in part on the coordination information. The UE may transmit a sidelink communication using the value of the sidelink communication parameter that is selected based at least in part on the coordination information. Numerous other aspects are described.
Abstract:
Methods, systems, and devices for wireless communications are described. To support cross-carrier sidelink resource reservation, a user equipment (UE) may transmit sidelink control signaling in a carrier in a licensed frequency spectrum band (e.g., a licensed carrier) that reserves one or more sidelink resources of a carrier in an unlicensed frequency spectrum band (e.g., an unlicensed carrier) for transmission of sidelink data. For example, the UE may determine the one or more sidelink resources for transmission of the sidelink data in the unlicensed carrier and may transmit the sidelink control signaling in the licensed carrier to reserve the one or more sidelink resources. The UE may then transmit the sidelink data in the one or more sidelink resources of the unlicensed carrier. In some examples, the UE may perform a channel access procedure before transmitting the sidelink data and may transmit the sidelink data based on the channel access procedure.
Abstract:
Aspects for reducing interference for transmissions in unlicensed frequency bands are disclosed. An apparatus, e.g., a user equipment (UE) with information to transmit, identifies before transmitting the information in an unlicensed frequency spectrum, a specified duration of a listen-before-talk (LBT) operation in that spectrum. Based on the specified duration, the UE reduces a transmission time duration of a slot of the UE to increase a time duration of a remainder of the slot sufficient to prevent, or decrease the likelihood of, a transmission by the UE in the slot from interfering with an LBT operation by another UE.
Abstract:
Certain aspects of the present disclosure provide a method for wireless communications by a transmitter UE. The method generally includes transmitting data to at least one receiver UE in an unlicensed spectrum used for sidelink communication, determining if a resource in a slot is available for the at least one receiver UE to provide acknowledgment feedback for the data transmission, and transmitting a reservation signal in the slot if the resource is determined to be available.
Abstract:
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive information identifying a shared channel occupancy for a packet transmission resource; determine a range metric for die shared channel occupancy based at least in part on location information; determine whether to share the shared channel occupancy for packet transmission using the packet transmission resource based at least in part on the range metric; and selectively transmit one or more packets in the shared channel occupancy based at least in part on a result of determining whether to share the shared channel occupancy. Numerous other aspects are provided.
Abstract:
Certain aspects of the present disclosure provide techniques for sidelink communications in an unlicensed spectrum. A method that may be performed by a device includes sensing a channel for interference in each of a plurality of time intervals in order of time until interference below a threshold is sensed for one of the plurality of time intervals or interference above the threshold is sensed for all of the plurality of time intervals, the plurality of time intervals being of a time window. The method may also include sensing interference to be above a threshold in a first portion of the one of the plurality of time intervals. The method may also include sensing interference to be below the threshold in a second portion of the one of the plurality of time intervals that occurs later in time than the first portion.
Abstract:
Certain aspects of the present disclosure provide methods and apparatus for determining a Zone identifier (ID), Zone Center, and negative acknowledgement (NACK) ranges. Included are operations and means at a receiving user equipment (UE) to determine a current geographic location (GLL) of the receiving UE, and select a Zone ID based on a two-dimensional (2-D) lookup into an indexed array with the current GLL, the indexed array storing Zone data for one or more geographic Zones. The Zone data for each geographic Zone may be indexed according to geographic position, and include a Zone ID, Zone center, and one or more NACK ranges, each NACK range corresponding with a geographic Zone disposed about the geographic Zone corresponding to the Zone ID. Operations further include performing a NACK operation based on the selected Zone ID and a NACK range.
Abstract:
Certain aspects of the present disclosure provide techniques for determining priority information associated with hybrid automatic repeat request (HARQ) feedbacks for wireless nodes in sidelink communications. A subset of the HARQ feedbacks are selected based on the priority information. The selected HARQ feedbacks are then transmitted to the second wireless nodes.