EP-4736563-A1 - SYSTEMS AND METHODS FOR PRACH ENHANCEMENT IN UAVS

EP4736563A1EP 4736563 A1EP4736563 A1EP 4736563A1EP-4736563-A1

Abstract

Presented are systems and methods for physical random access channel (PRACH) enhancement in unmanned aerial vehicles (UAVs). A wireless communication device can transmit a message to a wireless communication node for random access channel (RACH) transmission, determined based on RACH configurations of at least one RACH parameter and associated one or more height information.

Inventors

YIN, Yachao
ZHANG, NAN
CAO, WEI
LI, JUNLI

Assignees

ZTE Corporation

Dates

Publication Date: 20260506
Application Date: 20230629

Claims (20)

A method comprising: transmitting, by a wireless communication device, a message to a wireless communication node for random access channel (RACH) transmission, determined based on RACH configurations of at least one RACH parameter and associated one or more height information.
The method of claim 1, comprising: receiving, by the wireless communication device from the wireless communication node, the RACH configurations and the associated one or more height information.
The method of claim 1, wherein the message for the RACH transmission includes at least one of: a preamble, a Msg-A for two-step random access procedure, or a Msg-3.
The method of claim 1, wherein the at least one RACH parameter comprises a parameter or a set of multiple parameters for use in performing random access or avoiding conflict or collision with at least one other wireless communication device.
The method of claim 1, wherein the at least one RACH parameter comprises an indication of at least one of: the one or more height information, one or a set of preamble formats, one or a set of physical random access channel (PRACH) configuration indexes, one or a set of PRACH occasions (ROs) or resources, one or a set of cyclic shift values, one or a set of logical root indexes, one or more types of restricted sets, or one or a set of cyclic shift indexes.
The method of claim 2, wherein receiving the RACH configurations comprises receiving the RACH configurations via at least one of a first higher layer signaling, a second higher layer signaling, or a third higher layer signaling to indicate RACH parameters associated with the one or more height information.
The method of claims 1, 5, or 6, wherein the at least one RACH parameter is configured by the first higher layer signaling, and the associated one or more height information is configured by the second higher layer signaling.
The method of claims 1, 5, or 6, wherein the at least one RACH parameter and the associated one or more height information are jointly configured by the third higher layer singaling including at least one of: the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, height information} , the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, RACH parameter, height information} , the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, height information, height information} , or the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, RACH parameter, height information, height information, height information} .
The method of any one of claims 1-8, wherein the one or more height information are configured as at least one of: a single value, at least two values, a range applicable to different RACH parameters, a reference height applicable to different RACH parameters, or a threshold applicable to different RACH parameters.
The method of claims 8 or 9, wherein the one or more height information comprise at least one of: an absolute height, a relative height relative to a surrounding environment, or an absolute height threshold and one or more reference heights.
The method of any one of claims 1-10, wherein the one or more height information comprise at least one of: one or more height information configured per cell, or one or more height information configured per region.
The method of claim 5, wherein the at least one RACH parameter comprises: the one or a set of preamble format and the one or a set of ROs or resources; or the one or a set of cyclic shift values and the one or a set of logical root indexes.
The method of claim 1, comprising: receiving, by the wireless communication device from the wireless communication node, the RACH configurations via at least one of: a medium access control (MAC) signaling, a radio resource control (RRC) signaling, a system information block (SIB) signaling, or other higher layer signalings.
The method of claim 1, comprising: receiving, by the wireless communication device from the wireless communication node, the RACH configurations, after the wireless communication device rises to at least a specific height or a height associated with the one or more height information.
The method of claim 1, comprising: receiving, by the wireless communication device from the wireless communication node, the RACH configurations, each of the RACH configurations comprising at least one RACH parameter that is configured according to a corresponding height information; determining, by the wireless communication device, a current height of the wireless communication device; and identifying, by the wireless communication device, one of the RACH configurations, with a corresponding height information that is higher or lower than the current height.
The method of claim 5, wherein the one or a set of cyclic shift values comprise a cyclic shift value that is a smallest of a plurality of cyclic shift values, or comprise a cyclic shift value that is smaller than at least one other cyclic shift value.
The method of claim 5, wherein the one or a set of root index values comprise a logical root index value that is smallest from a plurality of logical root index values, or comprise a logical root index value that is largest from the plurality of logical root index values.
The method of claim 5, comprising at least one of: generating, by the wireless communication device, at least one preamble sequence according to at least one of the one or a set of preamble formats, the one or a set of PRACH configuration indexes, the one or a set of logical root index values, the one or a set of cyclic shift values or the type of restricted sets; or transmitting, by the wireless communication device, a preamble on a specific RO based on the at least one RACH configuration and whether the wireless communication device is at a height that meets the one or more height information, wherein the at least one RACH configuration comprises at least one of the one or a set of PRACH configuration indexes, the one or a set of ROs, or the one or a set of PRACH resources at a height information.
A method comprising: receiving, by a wireless communication node, a message from a wireless communication device for random access channel (RACH) transmission, determined based on RACH configurations of at least one RACH parameter and associated one or more height information.
A non-transitory computer readable medium storing instructions, which when executed by at least one processor, cause the at least one processor to perform the method of any one of claims 1-19.

Description

SYSTEMS AND METHODS FOR PRACH ENHANCEMENT IN UAVs TECHNICAL FIELD The disclosure relates generally to wireless communications, including but not limited to systems and methods for physical random access channel (PRACH) enhancement in unmanned aerial vehicles (UAVs) . BACKGROUND The standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC) . The 5G NR will have three main components: a 5G Access Network (5G-AN) , a 5G Core Network (5GC) , and a User Equipment (UE) . In order to facilitate the enablement of different data services and requirements, the elements of the 5GC, also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need. SUMMARY The example embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure. At least one aspect is directed to a system, method, apparatus, or a computer-readable medium of the following. A wireless communication device (e.g., UE, UAV, and/or other types of aerial devices) can send/transmit/providea message to a wireless communication node (e.g., BS, gNB, and/or network node) for random access channel (RACH) transmission, determined based on RACH configurations of at least one RACH parameter and associated one or more height information (e.g., thresholds, ranges, etc., including one or more values, which can be absolute and/or relative values, etc. ) . The wireless communication device can receive/obtain/acquire the RACH configurations and the associated one or more height information from the wireless communication node. In some implementations, the message for the RACH transmission can include/comprise at least one of: a preamble, a Msg-Afor two-step random access procedure, and/or a Msg-3. In some implementations, the at least one RACH parameter can comprise/include a parameter or a set of multiple parameters for use in performing random access or avoiding conflict or collision with at least one other wireless communication device. In some implementations, the at least one RACH parameter can comprise an indication of at least one of: the one or more height information, one or a set of preamble formats, one or a set of PRACH configuration indexes, one or a set of physical random access channel (PRACH) occasions or resources , one or a set of cyclic shift values, one or a set of logical root indexes, one or more types of restricted sets, and/or one or a set of cyclic shift indexes. In some implementations, receiving the RACH configurations can comprise receiving the RACH configurations via at least one of a first higher layer signaling, a second higher layer signaling, and/or a third higher layer signaling to indicate RACH parameters associated with the one or more height information. In some implementations, the at least one RACH parameter can be configured by the first higher layer signaling, and the associated one or more height information is configured by the second higher layer signaling. In some implementations, the at least one RACH parameter and the associated one or more height information are jointly configured by the third higher layer singaling including at least one of: the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, height information} , the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, RACH parameter, height information} , the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, height information, height information} , and/or the at least one RACH parameter and the associated one or more height information are configured in pair {RACH parameter, RACH parameter, height information, height information, height information} . In some implementations, the one or more height information may be configured as at least one of: a single value, at least two values, a range applicable to different RACH parameters, a reference height applicable to different RACH parameters, and/or a t