TECHNICAL FIELD

Various aspects described herein generally relate to wireless communication systems, and more particularly, to configurable reference signal time difference (RSTD) search windows for observed time difference of arrival (OTDOA) and multi-round trip time (RTT) based positioning.

BACKGROUND

Wireless communication systems are widely deployed to provide various types of communication content, such as voice, data, multimedia, and so on. Typical wireless communication systems are multiple-access systems capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems 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, and others. These systems are often deployed in conformity with specifications such as Long Term Evolution (LTE) and LTE Advanced (LTE-A) provided by the Third Generation Partnership Project (3GPP), Ultra Mobile Broadband (UMB) and Evolution Data Optimized (EV-DO) provided by the Third Generation Partnership Project 2 (3GPP2), WiFi (also referred to as Wi-Fi) 802.11 provided by the Institute of Electrical and Electronics Engineers (IEEE), etc.

A fifth generation mobile standard (referred to as “5G” or “New Radio” (NR)) will enable higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements. The 5G standard, according to the Next Generation Mobile Networks Alliance, is designed to provide data rates of several tens of megabits per second to each of tens of thousands of users, with 1 gigabit per second to tens of workers on an office floor. Several hundreds of thousands of simultaneous connections should be supported in order to support large sensor deployments. Consequently, the spectral efficiency of 5G mobile communications should be significantly enhanced compared to the current LTE standard. Furthermore, signaling efficiencies should be enhanced and latency should be substantially reduced compared to current standards.

To support position estimations in terrestrial wireless networks, a mobile device can be configured to measure and report the OTDOA or RSTD between reference RF signals received from two or more network nodes (e.g., different base stations or different transmission points (e.g., antennas) belonging to the same base station).

SUMMARY

The following presents a simplified summary relating to one or more aspects disclosed herein. As such, the following summary should not be considered an extensive overview relating to all contemplated aspects, nor should the following summary be regarded to identify key or critical elements relating to all contemplated aspects or to delineate the scope associated with any particular aspect. Accordingly, the following summary has the sole purpose to present certain concepts relating to one or more aspects relating to the mechanisms disclosed herein in a simplified form to precede the detailed description presented below.

In an aspect, a method of operating a network entity includes determining a reference signal timing difference (RSTD) search window based on a positioning reference signal (PRS) configuration; providing the RSTD search window to a user equipment (UE); and transmitting a plurality of PRS to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth.

In an aspect, a network entity includes a transceiver circuitry; a memory circuitry; and a processor circuitry, wherein the transceiver circuitry, the memory circuitry, and the processor circuitry are configured to: configure an RSTD search window based on a PRS configuration; provide the RSTD search window to a UE; and transmit a plurality of PRS to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth.

In an aspect, a network entity includes means for configuring an RSTD search window based on a PRS configuration; means for providing the RSTD search window to a UE; and means for transmitting a plurality of PRS to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth.

In an aspect, a non-transitory computer-readable medium storing computer-executable instructions for a network entity includes computer-executable instructions comprising one or more instructions instructing the network entity to configure an RSTD search window based on a PRS configuration; one or more instructions instructing the network entity to provide the RSTD search window to a UE; and one or more instructions instructing the network entity to transmit a plurality of PRS to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth.

In an aspect, a method of operating a UE includes receiving an RSTD search window based on a PRS configuration; receiving a plurality of PRS from a network node, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth; and determining an RSTD between the network node and a reference node based on the RSTD search window.

In an aspect, a UE includes a transceiver circuitry; a memory circuitry; and a processor circuitry, wherein the transceiver circuitry, the memory circuitry, and the processor circuitry are configured to: receive an RSTD search window based on a PRS configuration; receive a plurality of PRS, from a network node, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth; and determine an RSTD between the network node and a reference node based on the RSTD search window.

In an aspect, a UE includes means for receiving an RSTD search window based on a PRS configuration; means for receiving a plurality of PRS, from a network node, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth; and means for determining an RSTD between the network node and a reference node based on the RSTD search window.

In an aspect, a non-transitory computer-readable medium storing computer-executable instructions for a UE includes computer-executable instructions comprising one or more instructions instructing the UE to receive an RSTD search window based on a PRS configuration; one or more instructions instructing the UE to receive a plurality of PRS, from a network node, each PRS having the PRS configuration, wherein the plurality of PRS are transmitted in a subset that is less than all subcarriers over a given bandwidth; and one or more instructions instructing the UE to determine an RSTD between the network node and a reference node based on the RSTD search window.

In an aspect, a method of operating a location server includes determining an RSTD search window based on a PRS configuration; providing the RSTD search window to a UE or a base station serving the UE; and configuring a plurality of PRS to be transmitted to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are to be transmitted in a subset that is less than all subcarriers over a given bandwidth.

In an aspect, a location server includes a transceiver circuitry; a memory circuitry; and a processor circuitry, wherein the transceiver circuitry, the memory circuitry, and the processor circuitry are configured to: determine an RSTD search window based on a PRS configuration; provide the RSTD search window to a UE or a base station serving the UE; and configure a plurality of PRS to be transmitted to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are to be transmitted in a subset that is less than all subcarriers over a given bandwidth.

In an aspect, a location server includes means for determining an RSTD search window based on a PRS configuration; means for providing the RSTD search window to a UE or a base station serving the UE; and means for configuring a plurality of PRS to be transmitted to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are to be transmitted in a subset that is less than all subcarriers over a given bandwidth.

In an aspect, a non-transitory computer-readable medium storing computer-executable instructions for a location server includes computer-executable instructions comprising one or more instructions instructing the location server to determine an RSTD search window based on a PRS configuration; one or more instructions instructing the location server to provide the RSTD search window to a UE or a base station serving the UE; and one or more instructions instructing the location server to configure a plurality of PRS to be transmitted to the UE, each PRS having the PRS configuration, wherein the plurality of PRS are to be transmitted in a subset that is less than all subcarriers over a given bandwidth.

Other objects and advantages associated with the aspects disclosed herein will be apparent to those skilled in the art based on the accompanying drawings and detailed description.

