FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for position message update rate adaptation for vehicle-to-pedestrian communications.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, or the like.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New Radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.

SUMMARY

In some aspects, an apparatus for wireless communication at a user equipment (UE) for wireless communication includes a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to: transmit to at least one vehicle UE, in accordance with a first update rate, a first set of position messages indicating position information associated with the UE; and transmit a second set of position messages in accordance with a second update rate.

In some aspects, an apparatus for wireless communication at a UE for wireless communication includes a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to: transmit, to a pedestrian UE and based at least in part on a determination that an update request condition is satisfied, an update request message indicating a request for position information associated with the pedestrian UE; and receive, from the pedestrian UE, a position message based at least in part on the request for position information.

In some aspects, an apparatus for wireless communication at a UE for wireless communication includes a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to: transmit to at least one vehicle UE, in accordance with a first discontinuous transmission and reception cycle, a first set of position messages indicating position information associated with the UE and at least one additional UE; and receive, from the at least one additional UE and in accordance with a second discontinuous transmission and reception cycle, a second set of position messages indicating position information associated with the at least one additional UE.

In some aspects, an apparatus for wireless communication at a UE for wireless communication includes a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to: receive, from a vehicle UE and based at least in part on a determination that an update request condition is satisfied, an update request message indicating a request for position information associated with the UE; and transmit, to the vehicle UE, a position message based at least in part on the request for position information.

In some aspects, a first apparatus for wireless communication at a first UE for wireless communication includes a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to: determine that a second UE comprises a cluster head for a cluster of UEs that includes the first UE and the second UE; and transmit, to the second UE and in accordance with a discontinuous transmission and reception cycle, a set of position messages indicating position information associated with the first UE.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

