WO2020186403A1

WO2020186403A1 - Access procedure reporting

Info

Publication number: WO2020186403A1
Application number: PCT/CN2019/078352
Authority: WO
Inventors: Huichun LIU; Peng Cheng; Gavin Bernard Horn; Xipeng Zhu
Original assignee: Qualcomm Incorporated
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2020-09-24
Also published as: WO2020187013A1

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a trigger for performing a random access procedure (e.g., a four-step, a two-step random access procedure). The UE may perform a successful or unsuccessful random access procedure based on the trigger. When the random access procedure is successful, the UE may log information of the successful random access procedure, and transmit the information in a random access report. Otherwise, when the random access procedure is unsuccessful, the UE may transmit a random access failure report, which may include a radio resource control connection establishment failure report, or an indication of the trigger, a synchronization signal block index, or both. In some examples, the UE may log information associated with an on-demand system information measurement based on a logged measurement configuration. The on-demand system information measurement may be transmitted in an on-demand system information acquisition report.

Description

ACCESS PROCEDURE REPORTING

BACKGROUND

The following relates generally to wireless communications, and more specifically to access procedure reporting.

Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal frequency division multiple access (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .

A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as UEs. Some wireless systems may support one or more random access procedures for establishing a connection between a UE and a base station. The random access procedures may involve a series of handshake messages exchanged between the UE and the base station. Techniques for reporting information regarding random access procedures may be deficient.

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support access procedure reporting. Generally, the described techniques provide for a user equipment (UE) to provide improvements to random access procedure reporting. For example, a random access procedure report may support inclusion of certain information (e.g., cause of a random access procedure, logging a cause of a random access procedure, or a result of a random access procedure, and/or the like) according to an outcome of a random access procedure, such as a successful random access procedure or a failed random access procedure. Additionally, or alternatively, improvements to random access procedure reporting may include supporting on-demand system information collection, such as random access channel information.

A method of wireless communications at a UE is described. The method may include identifying a trigger for performing a random access procedure, performing a successful random access procedure based on the trigger, and logging information associated with the successful random access procedure.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and log information associated with the successful random access procedure.

Another apparatus for wireless communications is described. The apparatus may include means for identifying a trigger for performing a random access procedure, performing a successful random access procedure based on the trigger, and logging information associated with the successful random access procedure.

A non-transitory computer-readable medium storing code for wireless communications at a UE is described. The code may include instructions executable by a processor to identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and log information associated with the successful random access procedure.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a random access report based on the successful random access procedure.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving an information request message, where transmitting the random access report may be further based on the information request message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the random access report includes a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a default reporting configuration includes transmitting the random access report for a last successful random access procedure.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a logging configuration.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for logging the information associated with the successful random access procedure may be based on the logging configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logging configuration configures the UE to log a number of previous random access attempts.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logging configuration configures the UE to log previous random access attempts occurring with a time window.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logging configuration may be received as a logged minimization of driving tests (MDT) configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logging configuration may be received as a radio resource management (RRM) configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the information associated with the successful random access procedure includes a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the trigger for performing the random access procedure includes a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the trigger for performing the random access procedure includes a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink may be out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof.

A method of wireless communications at a UE is described. The method may include identifying a trigger for performing a random access procedure, performing an unsuccessful random access procedure based on the trigger, and transmitting a random access failure report based on the unsuccessful random access procedure.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and transmit a random access failure report based on the unsuccessful random access procedure.

Another apparatus for wireless communications is described. The apparatus may include means for identifying a trigger for performing a random access procedure, performing an unsuccessful random access procedure based on the trigger, and transmitting a random access failure report based on the unsuccessful random access procedure.

A non-transitory computer-readable medium storing code for wireless communications at a UE is described. The code may include instructions executable by a processor to identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and transmit a random access failure report based on the unsuccessful random access procedure.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the random access failure report includes a radio resource control connection establishment failure report.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the random access failure report includes an indication of the trigger, a synchronization signal block index, or both.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the random access failure report may be transmitted as a radio resource control connection establishment failure report, and where the random access failure report includes an indication of the trigger.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the random access failure report includes an indication of a set of random access procedure failures.

A method of wireless communications at a UE is described. The method may include receiving a logged measurement configuration, logging information associated with an on-demand system information measurement based on the logged measurement configuration, and transmitting an on-demand system information acquisition report based on the information associated with the on-demand system information measurement.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive a logged measurement configuration, log information associated with an on-demand system information measurement based on the logged measurement configuration, and transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement.

Another apparatus for wireless communications is described. The apparatus may include means for receiving a logged measurement configuration, logging information associated with an on-demand system information measurement based on the logged measurement configuration, and transmitting an on-demand system information acquisition report based on the information associated with the on-demand system information measurement.

A non-transitory computer-readable medium storing code for wireless communications at a UE is described. The code may include instructions executable by a processor to receive a logged measurement configuration, log information associated with an on-demand system information measurement based on the logged measurement configuration, and transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying on-demand system information measurement configuration parameters based on the logged measurement configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the on-demand system information measurement configuration parameters include a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a broadcast by a base station, or a combination thereof.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a trigger for a request for on-demand system information.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the trigger includes an on-demand system information request.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving the request for on-demand system information based on the trigger, where transmitting the on-demand system information acquisition report may be further based on the request for on-demand system information.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting an indicator that indicates an availability of the on-demand system information acquisition report.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indicator may be transmitted in a random access message during transition of the UE to a radio resource control connected state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indicator may be transmitted in a dedicated radio resource control signaling.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be received when the UE may be in a radio resource control connected state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be received when the UE may be transitioned from a radio resource control connected state to a radio resource control inactive state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be received as part of a suspend message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be received when the UE may be transitioned from a radio resource control connected state to a radio resource control idle state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be received as part of a radio resource control release message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be received when the UE may be transitioned from a radio resource control inactive state back to the radio resource control inactive state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the on-demand system information acquisition report includes measurement reporting parameters.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the measurement reporting parameters include a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.

A method of wireless communications at a network entity is described. The method may include identifying a trigger for performing a random access procedure, performing a successful random access procedure based on the trigger, and receiving a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and receive a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure.

Another apparatus for wireless communications is described. The apparatus may include means for identifying a trigger for performing a random access procedure, performing a successful random access procedure based on the trigger, and receiving a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure.

A non-transitory computer-readable medium storing code for wireless communications at a network entity is described. The code may include instructions executable by a processor to identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and receive a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting an information request message, where receiving the random access report may be further based on the information request message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a default reporting configuration includes receiving the random access report for a last successful random access procedure.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a logging configuration to a UE.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logging configuration may be transmitted as an RRM configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged information associated with the successful random access procedure includes a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof.

A method of wireless communications at a network entity is described. The method may include identifying a trigger for performing a random access procedure, performing an unsuccessful random access procedure based on the trigger, and receiving a random access failure report based on the unsuccessful random access procedure.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and receive a random access failure report based on the unsuccessful random access procedure.

Another apparatus for wireless communications is described. The apparatus may include means for identifying a trigger for performing a random access procedure, performing an unsuccessful random access procedure based on the trigger, and receiving a random access failure report based on the unsuccessful random access procedure.

A non-transitory computer-readable medium storing code for wireless communications at a network entity is described. The code may include instructions executable by a processor to identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and receive a random access failure report based on the unsuccessful random access procedure.

A method of wireless communications at a network entity is described. The method may include transmitting a logged measurement configuration and receiving an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration.

An apparatus for wireless communications is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to transmit a logged measurement configuration and receive an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration.

Another apparatus for wireless communications is described. The apparatus may include means for transmitting a logged measurement configuration and receiving an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration.

A non-transitory computer-readable medium storing code for wireless communications at a network entity is described. The code may include instructions executable by a processor to transmit a logged measurement configuration and receive an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a trigger for a request for on-demand system information.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the request for on-demand system information based on the trigger, where receiving the on-demand system information acquisition report may be further based on the request for on-demand system information.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving an indicator that indicates an availability of the on-demand system information acquisition report.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indicator may be received in a random access message during transition of a UE to a radio resource control connected state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be transmitted when a UE may be in a radio resource control connected state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be transmitted when a UE may be transitioned from a radio resource control connected state to a radio resource control inactive state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be transmitted as part of a suspend message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be transmitted when a UE may be transitioned from a radio resource control connected state to a radio resource control idle state.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be transmitted as part of a radio resource control release message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the logged measurement configuration may be transmitted when a UE may be transitioned from a radio resource control inactive state back to the radio resource control inactive state.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGs. 1 and 2 illustrate examples of a wireless communications system that supports access procedure reporting in accordance with aspects of the present disclosure.

FIGs. 3 through 5 illustrate examples of a process flow that supports access procedure reporting in accordance with aspects of the present disclosure.

FIGs. 6 and 7 show block diagrams of devices that support access procedure reporting in accordance with aspects of the present disclosure.

FIG. 8 shows a block diagram of a communications manager that supports access procedure reporting in accordance with aspects of the present disclosure.

FIG. 9 shows a diagram of a system including a device that supports access procedure reporting in accordance with aspects of the present disclosure.

FIGs. 10 and 11 show block diagrams of devices that support access procedure reporting in accordance with aspects of the present disclosure.

FIG. 12 shows a block diagram of a communications manager that supports access procedure reporting in accordance with aspects of the present disclosure.

FIG. 13 shows a diagram of a system including a device that supports access procedure reporting in accordance with aspects of the present disclosure.

FIGs. 14 through 21 show flowcharts illustrating methods that support access procedure reporting in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

Generally, the described techniques support improvements to random access procedure reporting. As part of a random access procedure (e.g., four-step or a two-step random access procedure) , user equipments (UEs) may provide a random access report, which may include certain information regarding the random access procedure (e.g., cause or a trigger) of the random access procedure, or one or more aspects associated with the random access procedure. In some examples, a random access report may support inclusion of certain information according to an outcome of a random access procedure, such as a successful random access procedure or a failed random access procedure. One or more triggers for performing a random access procedure may be inapplicable to random access reporting. For example, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof may be unsupported by present random access reporting techniques.

Additionally, standing random access reporting techniques may be inapplicable to one or more failure causes of a random access procedure. Enhanced access procedure reporting as described in accordance with aspects of the present disclosure may account for one or more failure causes. By way of example, UEs may identify a trigger for performing a random access procedure. As described herein, because a random access procedure may be successful or unsuccessful, the UEs may configure and transmit a random access report in response to a result of the random access procedure. The random access report may be configured to include certain information regarding the successful or unsuccessful random access procedure. Additionally, or alternatively, UEs may support improvements to on-demand system information collection and reporting as part of random access reports.

Aspects of the disclosure are initially described in the context of a wireless communications system. Aspects of the disclosure are also illustrated by and described with reference to process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to access procedure reporting.

FIG. 1 illustrates an example of a wireless communications system 100 that supports access procedure reporting in accordance with aspects of the present disclosure. The wireless communications system 100 includes base stations 105, UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some cases, wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices.

Base stations 105 may wirelessly communicate with UEs 115 via one or more base station antennas. Base stations 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or some other suitable terminology. Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations) . The UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.

Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions.

The geographic coverage area 110 for a base station 105 may be divided into sectors making up a portion of the geographic coverage area 110, and each sector may be associated with a cell. For example, each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof. In some examples, a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105. The wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

The term “cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) , and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) operating via the same or a different carrier. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC) , narrowband Internet-of-Things (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of devices. In some cases, the term “cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.

UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile. A UE 115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client. A UE 115 may also be a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like.

Some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices, and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) . M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application. Some UEs 115 may be designed to collect information or enable automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) . In some examples half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power saving “deep sleep” mode when not engaging in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications) . In some cases, UEs 115 may be designed to support critical functions (e.g., mission critical functions) , and a wireless communications system 100 may be configured to provide ultra-reliable communications for these functions.

In some cases, a UE 115 may also be able to communicate directly with other UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol) . One or more of a group of UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105, or be otherwise unable to receive transmissions from a base station 105. In some cases, groups of UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group. In some cases, a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between UEs 115 without the involvement of a base station 105.

Base stations 105 may communicate with the core network 130 and with one another. For example, base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., via an S1, N2, N3, or other interface) . Base stations 105 may communicate with one another over backhaul links 134 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) .

The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) , which may include at least one mobility management entity (MME) , at least one serving gateway (S-GW) , and at least one Packet Data Network (PDN) gateway (P-GW) . The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC. User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation as well as other functions. The P-GW may be connected to the network operators IP services. The operators IP services may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched (PS) Streaming Service.

At least some of the network devices, such as a base station 105, may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC) . Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP) . In some configurations, various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105) .

Wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

Wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band. The SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that may be capable of tolerating interference from other users.

Wireless communications system 100 may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band. In some examples, wireless communications system 100 may support millimeter wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate use of antenna arrays within a UE 115. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.

In some cases, wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz ISM band. When operating in unlicensed radio frequency spectrum bands, wireless devices such as base stations 105 and UEs 115 may employ listen-before-talk (LBT) procedures to ensure a frequency channel is clear before transmitting data. In some cases, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) . Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD) , time division duplexing (TDD) , or a combination of both.

In some examples, base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. For example, wireless communications system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115) , where the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream, and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are transmitted to multiple devices.

Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying certain amplitude and phase offsets to signals carried via each of the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .

In one example, a base station 105 may use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with a UE 115. For instance, some signals (e.g. synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station 105 multiple times in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.

Some signals, such as data signals associated with a particular receiving device, may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) . In some examples, the beam direction associated with transmissions along a single beam direction may be determined based at least in in part on a signal that was transmitted in different beam directions. For example, a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the signal it received with a highest signal quality, or an otherwise acceptable signal quality. Although these techniques are described with reference to signals transmitted in one or more directions by a base station 105, a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) , or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .

A receiving device (e.g., a UE 115, which may be an example of a mmW receiving device) may try multiple receive beams when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive beams or receive directions. In some examples a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal) . The single receive beam may be aligned in a beam direction determined based at least in part on listening according to different receive beam directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality based at least in part on listening according to multiple beam directions) .

In some cases, the antennas of a base station 105 or UE 115 may be located within one or more antenna arrays, which may support MIMO operations, or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some cases, antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations. A base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

In some cases, wireless communications system 100 may be a packet-based network that operate according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data. At the Physical layer, transport channels may be mapped to physical channels.

In some cases, UEs 115 and base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully. HARQ feedback is one technique of increasing the likelihood that data is received correctly over a communication link 125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) . HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., signal-to-noise conditions) . In some cases, a wireless device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.

Time intervals in LTE or NR may be expressed in multiples of a basic time unit, which may, for example, refer to a sampling period of T _s = 1/30,720,000 seconds. Time intervals of a communications resource may be organized according to radio frames each having a duration of 10 milliseconds (ms) , where the frame period may be expressed as T _f = 307,200 T _s. The radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the smallest scheduling unit of the wireless communications system 100, and may be referred to as a transmission time interval (TTI) . In other cases, a smallest scheduling unit of the wireless communications system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs) .

In some wireless communications systems, a slot may further be divided into multiple mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot or a mini-slot may be the smallest unit of scheduling. Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example. Further, some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE 115 and a base station 105.

The term “carrier” refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link 125. For example, a carrier of a communication link 125 may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a pre-defined frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) , and may be positioned according to a channel raster for discovery by UEs 115. Carriers may be downlink or uplink (e.g., in an FDD mode) , or be configured to carry downlink and uplink communications (e.g., in a TDD mode) . In some examples, signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .

The organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR) . For example, communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data. A carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc. ) and control signaling that coordinates operation for the carrier. In some examples (e.g., in a carrier aggregation configuration) , a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.

Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces) .

A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) . In some examples, each served UE 115 may be configured for operating over portions or all of the carrier bandwidth. In other examples, some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .

In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme) . Thus, the more resource elements that a UE 115 receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE 115. In MIMO systems, a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers) , and the use of multiple spatial layers may further increase the data rate for communications with a UE 115.

Devices of the wireless communications system 100 (e.g., base stations 105 or UEs 115) may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include base stations 105 and/or UEs 115 that support simultaneous communications via carriers associated with more than one different carrier bandwidth.

Wireless communications system 100 may support communication with a UE 115 on multiple cells or carriers, a feature which may be referred to as carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both FDD and TDD component carriers.

In some cases, wireless communications system 100 may utilize enhanced component carriers (eCCs) . An eCC may be characterized by one or more features including wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have a suboptimal or non-ideal backhaul link) . An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum) . An eCC characterized by wide carrier bandwidth may include one or more segments that may be utilized by UEs 115 that are not capable of monitoring the whole carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power) .

In some cases, an eCC may utilize a different symbol duration than other component carriers, which may include use of a reduced symbol duration as compared with symbol durations of the other component carriers. A shorter symbol duration may be associated with increased spacing between adjacent subcarriers. A device, such as a UE 115 or base station 105, utilizing eCCs may transmit wideband signals (e.g., according to frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc. ) at reduced symbol durations (e.g., 16.67 microseconds) . A TTI in eCC may consist of one or multiple symbol periods. In some cases, the TTI duration (that is, the number of symbol periods in a TTI) may be variable.

Wireless communications system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, among others. The flexibility of eCC symbol duration and subcarrier spacing may allow for the use of eCC across multiple spectrums. In some examples, NR shared spectrum may increase spectrum utilization and spectral efficiency, specifically through dynamic vertical (e.g., across the frequency domain) and horizontal (e.g., across the time domain) sharing of resources.

UEs 115 may identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, log information associated with the successful random access procedure, and transmit a random access report based on the successful random access procedure. In some examples, UEs 115 may perform an unsuccessful random access procedure based at least in part on the trigger, and transmit a random access failure report based on the unsuccessful random access procedure.

FIG. 2 illustrates an example of a wireless communications system 200 that supports access procedure reporting in accordance with aspects of the present disclosure. In some examples, wireless communications system 200 may implement aspects of wireless communication system 100. For example, wireless communications system 200 may include base station 105-a and UE 115-a within cell 110-a, which may be examples of corresponding devices described with reference to FIG. 1. In some examples, wireless communications system 200 provide improvements to random access procedure reporting. For example, a random access procedure report may support inclusion of certain information (e.g., cause of a random access procedure, logging a cause of a random access procedure, or a result of a random access procedure, and/or the like) according to an outcome of a random access procedure, such as a successful random access procedure or a failed random access procedure. Additionally, or alternatively, improvements to random access procedure reporting may include supporting on-demand system information collection, such as random access channel information.

Base station 105-a may perform a connection procedure (e.g., a random access procedure) with UE 115-a. For example, base station 105-a and UE 115-a may perform a random access procedure to establish a connection for wireless communication. In other examples, base station 105-a and UE 115-a may perform a random access procedure to re-establish a connection after connection failure with base station 105-a, or to establish a connection for handover to another base station, or the like. Base station 105-a and UE 115-a may also support multiple radio access technologies including 4G systems such as LTE systems, LTE-A systems, or LTE-A Pro systems, and 5G systems which may be referred to as NR systems.

The connection procedure between base station 105-a and UE 115-a may correspond to, for example, at least one of the above example radio access technologies. By way of example, a random access procedure may be related to 4G systems and may be referred to as a four-step random access procedure. As part of the four-step random access procedure, base station 105-a and UE 115-a may transmit one or more messages (e.g., handshake messages) , such as a random access message (also referred to herein as msg 1) , a second random access message (also referred to herein as msg 2) , a third random access response message (also referred to herein as msg 3) , and a fourth random access response message (also referred to herein as msg 4) .

In a four-step random access procedure, the procedure may commence with UE 115-atransmitting msg 1, which may include a preamble (also referred to as a random access preamble, a physical random access preamble, or a sequence) that may carry information, such as a UE identifier. The purpose of the preamble transmission may be to provide an indication to base station 105-apresence of a random access attempt, and to allow base station 105-a to determine a delay (e.g., a timing delay) between base station 105-a and UE 115-a. In some examples, UE 115-a may transmit msg 1 to base station 105-a on a physical random access channel.

The preamble of msg 1 may, in some examples, be defined by a preamble sequence and a cyclic prefix. A preamble sequence may be defined based in part on a Zadoff-Chu sequence. UE 115-a may additionally, or alternatively, use a guard period to handle timing uncertainty of msg 1 transmission. For example, before beginning the random access procedure, UE 115-a may obtain downlink synchronization with base station 105-a based on a cell-search procedure. However, because UE 115-a may have not yet obtained uplink synchronization with base station 105-a, there may be an uncertainty in uplink timing due to the location of UE 115-ain cell 110-a (e.g., geographic coverage area of base station 105-a) not being known. In some examples, the uncertainty in uplink timing may be based on a dimension (e.g., size, area) of cell 110-a. Therefore, appending a cyclic prefix to msg 1 may be beneficial, in some examples, for handling the uncertainty in uplink timing.

Upon receiving msg 1, base station 105-a may respond appropriately with msg 2. For example, base station 105-a may transmit msg 2 to UE 115-a on a downlink shared channel (DL-SCH) or a physical downlink control channel (PDCCH) . In some examples, msg 2 may have a same or a different configuration (format) compared to msg 1. In some examples, msg 2 may carry information for UE 115-a, where the information may be determined by base station 105-a based on information carried in msg 1. For example, information in msg 2 may include an index of a preamble sequence detected and for which the response is valid, a timing advance parameter determined based on the preamble sequence detected, a scheduling grant indicating time and frequency resources for UE 115-a to use for transmission of a next random access message transmission by UE 115-a, or a network identifier for further communication with UEs 115-a, or the like.

In some examples, msg 2 may be scheduled on a PDCCH using an identity reserved for random access messaging, for example, a RNTI. UE 115-a may monitor a PDCCH to detect and receive a random access message (e.g., msg 2) . In some examples, UE 115-a may monitor the PDCCH for a random access message transmission from base station 105-a during a random access response window, which may be fixed or variable in size. For example, if UE 115-a does not detect and receive a random access message transmission from base station 105-a, the random access attempt may be declared as a failure and the random access procedure may repeat.

Once UE 115-a successfully receive msg 2, UE 115-a may obtain uplink synchronization with base station 105-a. In some examples, before data transmission from UE 115-a, a unique identifier within cell 110-a may be assigned to UE 115-a. In some examples, depending on a state (e.g., an ideal state, an inactive state) of UE 115-a there may be a need for additional message (e.g., a connection request message) exchange for setting up the connection between base station 105-a and UE 115-a. Thus, UE 115-a may transmit any necessary messages, for example, a msg 3 to base station 105-a using UL-SCH resources (or PUSCH resources) assigned in msg 2. The msg 2 may include a UE identifier for contention resolution. If UE 115-a is in a connected state, for example, the UE identifier may be a cell radio network temporary identifier (C-RNTI) . Otherwise, the UE identifier may be specific to UE 115-a.

Base station 105-a may receive msg 3 and may respond properly, for example, by transmitting msg 4, which may be a contention resolution message. As a result of the contention resolution message, base station 105-a and UE 115-a may establish a connection for communication. Although, the four-step random access procedure may be effective for facilitating random access for UE 115-a, there may be unnecessary latencies associated with this procedure. For example, latencies related to contention-based protocol of random access messaging may exhaust additional resources of UE 115-a. Therefore, it may be advantageous for UE 115-a to support additionally, or alternatively a two-step random access procedure to reduce power consumption, as well as overhead signaling for UE 115-a.

A two-step random access procedure may be related to 5G systems. As part of a two-step random access procedure, to decrease latencies related to initial access aspects of the two-step random access procedure, base station 105-a and UE 115-a may exchange fewer messages (e.g., handshake messages) compared to a four-step random access procedure. For example, UE 115-a may transmit a single message, such as a random access message (also referred to herein as msg A) , and base station 105-a may transmit a single message, such as a random access response message (also referred to herein as msg B) in response to the random access message. The msg A may combine parts of msg 1 and msg 3 of a four-step random access procedure, while the msg B may combine aspects of msg 2 and msg 4 of the four-step random access procedure.

In some examples, msg A may include a preamble and a PUSCH carrying a payload, where information in the msg A may include the equivalent contents or aspects of msg 3 of a four-step random access procedure. Base station 105-a may monitor a PUSCH for a random access preamble or a payload of the msg A. The payload may carry a connection request. In some examples, base station 105-a may determine an absence of the random access preamble or the payload of the msg A based on the monitoring. Absence of the random access preamble or the payload of the msg A may result in a random access procedure failure. Otherwise, after successfully receiving the msg A, base station 105-a may transmit the msg B to UE 115-a. For example, base station 105-a may transmit the msg B to UE 115-a on a DL-SCH, PDSCH, PDCCH.

As part of a random access procedure, UE 115-a may provide a report, which may include certain information regarding the random access procedure, or one or more aspects associated with the random access procedure. For example, UE 115-a may provide a random access report 205 in a random access message (e.g., msg 3 of a four-step random access procedure, or msg A of a two-step random access procedure) to base station 105-a. Base station 105-a and UE 115-a may use random access information provided in random access report 205 to improve a random access procedure. For example, base station 105-a and UE 115-a may improve random access resource partition for contention-free random access, or contention-based random access groups (e.g., contention-based random access group A, contention-based random access group B) , or physical random access channel resource partition in time and frequency domain, or preamble partition for random access messages of a random access procedure, or the like.

Base station 105-a and UE 115-a may, in other examples, improve a random access procedure by reducing latencies associated with initial access via the random access procedure, as well as increasing a success rate of the random access procedure using random access information provided in random access report 205. For example, base station 105-aand UE 115-a may evaluate an initial received target power, a power ramping step, or a random access response window, or the like associated with preamble transmission of random access messages associated with random access procedures, or physical random access channel resource allocations (e.g., prach-ConfiguraitonIndex) , or sequences used for preambles of random access messages (e.g., sequence lengths such as sequence length of 839 vs.sequence length of 139) , or beam recovery configuration, or the like to improve overall random access procedures.

As outlined above, base station 105-a and UE 115-a may perform a random access procedure to establish a connection for wireless communication. In other examples, base station 105-a and UE 115-a may perform a random access procedure to re-establish a connection after connection failure with base station 105-a, or to establish a connection for handover to another base station, or the like. Other examples for base station 105-a and UE 115-a performing a random access procedure may include, but is not limited to, initial access from a radio resource control idle state or radio resource control inactive state, a radio resource connection reestablishment, a beam failure recovery, a secondary cell group modification (e.g., addition or change) , a time alignment for a secondary cell addition, an on-demand other system information request, an arrival of downlink data when uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources (e.g., of a physical uplink shared channel (PUSCH) ) for a scheduling request report, or a timing alignment acquisition for positioning, or any combination thereof.

One or more of the above examples causes (also referenced herein as triggers) for performing a random access procedure may be inapplicable to random access reporting. That is, one or more of the above example causes may not be supported by standing random access reporting techniques. For example, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof may be unsupported by present random access reporting techniques. Additionally, standing random access reporting techniques may be inapplicable to one or more failure causes of a random access procedure. Therefore, in accordance with aspects of the present disclosure, base station 105-a and UE 115-a may provide improved access procedure reporting.

As part of a random access procedure (or before the random access procedure) , UE 115-a may identify a trigger for performing the random access procedure, which may be at least one of the above example triggers. In some examples, the trigger for performing the random access procedure may be a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery. In an example, a random access procedure between base station 105-a and UE 115-a may be successful or unsuccessful, for example, based on the trigger (e.g., a handover) . UE 115-a may transmit random access report 205 in response to an outcome of the random access procedure (e.g., successful random access procedures, failed random access procedures) . In some examples, UE 115-a may have a default reporting configuration that includes transmitting random access report (s) 205 for a last successful random access procedure.

According to an example technique, as part of a random access procedure, UE 115-a may log information of the random access procedure appropriately. In some examples, UE 115-a may receive a logging configuration 210 from base station 105-a that may outline instructions for UE 115-a to log certain information associated with random access procedures (e.g., successful random access procedures, failed random access procedures) . By way of example, UE 115-a may receive logging configuration 210, from base station 105-a, as a logged minimization of driving tests (MDT) configuration (e.g., via a loggedMeasurementConfiguration information element) , or a radio resource management (RRM) configuration (e.g., via radio resource control reconfiguration) , or the like. Further the instructions in the logging configuration 210 may configure UE 115-a to log random access activities, for example, to log a number of previous random access attempts (e.g., Nrandom access attempts) , or to log previous random access attempts occurring during a time window (e.g., within a period of time, such as Thours) .

UE 115-a may include certain logged information in random access report 205 based on an outcome of the random access procedure. For example, UE 115-a may include the following logged information, in random access report 205 for a successful random access procedure: a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or any combination thereof.

In some examples, UE 115-a may receive an information request message (e.g., UEInformationRequest message) from base station 105-a, when in connected mode (e.g., radio resource control connected mode) . Here, UE 115-a may transmit random access report 205 that includes the example information listed above based on the received information request message. For example, UE 115-a may include a cell identifier (although the cell identifier is optional and may not be present if it is the same as a primary cell or serving cell) , a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof in a random access report for a successful random access procedure. In some examples, this random access reporting technique may be inapplicable to a subset of the examples triggers, such as on-demand system information and timing alignment acquisition for positioning when UE 115-a is not in a connected mode.

According to another example technique, UE 115-a may transmit random access report 205 that may be specific to when an outcome of the random access procedure is unsuccessful-a failed random access procedure. For example, random access report 205 may be a random access failure report when the outcome of the random access procedure is unsuccessful. Although the random access failure report may include a radio resource control connection establishment failure report, which may log a random access procedure failure, the radio resource control connection establishment failure report may be unable to log other random access information related to the failure. Therefore in accordance with aspects of the present disclosure, base station 105-a and UE 115-a may provide improvements to access procedure reporting for unsuccessful random access procedures, by reusing aspects of the radio resource control connection establishment failure report. For example, UE 115-a may generate a random access failure report that may include a radio resource control connection establishment failure report, an indication of a trigger of a random access procedure (which may include one of the example triggers described herein) , a synchronization signal block index, or any combination thereof. Alternatively, UE 115-a may provide improvement to access procedure reporting for unsuccessful random access procedures by including one or more parameters, such as triggers into a radio resource control connection establishment failure report. UE 115-a may additionally, or alternatively, be capable of reporting multiple random access procedure failures in a random access failure report. Here, the multiple failures and corresponding information (e.g., trigger, synchronization signal block index) may be reported as a list, a table, or the like.

The techniques above may provide efficacy to base station 105-a and UE 115-a by reducing or eliminating latencies associated with processes related to access procedures, and more specifically to establish a connection between base station 105-a and UE 115-a. Further improving access reporting associated with access procedures may provide benefits and enhancements to operation of base station 105-a and UE 115-a. For example, by inclusion of certain information related to one or more of the above examples into a report (e.g., a random access report) , previously unsupported by other reporting techniques, operational characteristics, such as power consumption, and the like related to access procedures may be reduced.

Base station 105-a and UE 115-a may additionally, or alternatively provide enhancements to access reporting related to access procedures by providing improvements to on-demand system information reporting. At present, base station 105-a may transmit system information based on a broadcast method or an on-demand method. For the broadcast method, base station 105-a may broadcast system information messages to UE 115-a. In this method, since system information has already been broadcasted, UE 115-a may acquire the system information without having to transmit an on-demand system information request to base station 105-a. Alternatively, for the on-demand method, system information messages may be transmitted to UE 115-a in response to UE 115-a requesting the information from base station 105-a via an on-demand system information request message during a random access procedure. On-demand system information may be applicable when UE 115-a is in an idle state or in an inactive state.

With reference to four-step random access procedures, UE 115-a may transmit an on-demand system information request as part of msg 1 or msg 3, to request a certain system information message or a group of system information messages. In some examples, when the on-demand system information request is part of msg 1, each system information message may be associated with random access resources (e.g., time and frequency resources, preambles) . If multiple system information messages are associated with matching random access resources, then the system information messages may be broadcasted. In other examples, when the on-demand system information request is part of msg 3, a radio resource control message (e.g., an RRCSystemInfoRequest message) may be transmitted that includes a bit sequence (e.g., bit string) , where each bit in the sequence correlates to a system information message. Thus, base station 105-a may identify a requested system information message based on a bit value that corresponds to the requested system information message. Accordingly, base station 105-a may transmit the requested system information message to UE 115-a. In some examples, system information scheduling information elements (IEs) in a system information message (e.g., system information block (SIB) 1) may indicate whether each system information message including other SIB (s) is delivered via broadcast or on-demand.

UE 115-a may log random access information for successful random access procedures, in some examples, without receiving any prior configuration from base station 105-a. In some examples, base station 105-a may request UE 115-a to provide a random access report including logged random access information of a latest successful random access procedure, after UE 115-a enters a connected mode (e.g. radio resource control connected mode) without prior configuration. The random access report including the logged random access information of the latest successful random access procedure may include a number of random access channel preamble transmissions, or a contention resolution failure detection parameter, or both. UE 115-a may discard the random access report based on switching to an idle state. Some example logged measurement configurations may specify log collection for radio resource control establishment failures. The logs may be generated when the radio resource control establishment procedure fails. These logged measurement configurations are, however, inapplicable to on-demand system information acquisition information collection.

According to an example, as part of random access procedures, base station 105-a may configure separate random access resources for on-demand system information acquisition (e.g., with ra-AssociationPeriodIndex and si-RequestPeriod for msg 1, with reference to four-step random access procedures) . In other examples, with reference to four-step random access procedures, on-demand system information requests may be included as part of msg 1 or msg 3. In some other examples, on-demand system information requests may be applicable to two multiple radio resource control states, such as an idle state and an inactive state. Thus, UE 115-a may not have to switch states to perform system information acquisition. In some examples, on-demand system information acquisition may be a success or unsuccessful for UE 115-a. For example, UE 115-a may have performed multiple on-demand system information acquisition in different cells before establishing a radio resource control connection in a certain cell.

At present, random access reports include random access information on a latest successful random access procedure. Base station 105-a may receive the report after UE 115-a switches to a connected state successfully. Additionally, accessibility may be applicable to radio resource control establishment failure scenarios. It therefore may be advantageous for base station 105-a and UE 115-a to provide improvements to on-demand system information random access information collection. Base station 105-a and UE 115-a may provide improvements to on-demand system information acquisition using one or more techniques, such as applying a logged MDT-based method for on-demand system information random access reporting, enhancing existing random access report formats for a successful on-demand system information request, including a new IE for a failed on-demand system information request, or including a new indication about availability of on-demand system information random access reports to base station 105-a, or any combination thereof.

According to an example technique, UE 115-a may receive a logged measurement configuration. In some examples, signaling of the configuration may be MDT-based for UE 115-a and initiated by base station 105-a (or 5G core network) , or management-based without targeting UE 115-a and initiated by an operations and maintenance (OAM) network entity. In some examples, the logged measurement configuration may indicate an on-demand system information log type. UE 115-a may log information associated with an on-demand system information measurement based in part on the logged measurement configuration, and transmit an on-demand system information acquisition report 215 based in part on the information associated with the on-demand system information measurement.

UE 115-a may receive the logged measurement configuration from base station 105-a, when UE 115-a is in a radio resource control connected state. For example, base station 105-a may transmit a radio resource control message (e.g., a LoggedMeasurementConfiguration message) to UE 115-a that may be used to transfer on-demand system information measurement configuration parameters for logged MDT. In some examples, UE 115-a may receive the logged measurement configuration from base station 105-a, when UE 115-a switches from a radio resource control connected state to a radio resource control inactive state. For example, base station 105-a may transmit a radio resource control message (e.g., a radio resource control release message) to UE 115-a. The radio resource control message may be a suspend message, which may carry the logged measurement configuration (e.g., LoggedMeasurementConfiguration message) . In other examples, UE 115-a may receive the logged measurement configuration from base station 105-a, when UE 115-a switches from a radio resource control connected state to a radio resource control idle state. Here, the logged measurement configuration (e.g., LoggedMeasurementConfiguration message) may be received as part of a radio resource control release message. In some other examples, UE 115-a may receive the logged measurement configuration from base station 105-a, when UE 115-a switches from a radio resource control inactive state back to the radio resource control inactive state. In these examples, the logged measurement configuration (e.g., LoggedMeasurementConfiguration message) may be received as part of a suspend message.

UE 115-a may identify on-demand system information measurement configuration parameters based on the logged measurement configuration. For example, UE 115-a may identify a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a system information broadcast by a base station, or a combination thereof. Additionally, or alternatively, on-demand system information measurement configuration parameters may include a trace collection entity (TCE) identifier, a trace reference parameter, a trace recording session reference parameter, a timing parameter (e.g., a timestamp to be used as a time reference to UE 115-a) , a location information parameter, a logging duration parameter, a downlink cell-level pilot strength measurement logging parameter, a downlink beam-level pilot strength measurement logging parameter, a logging area parameter (e.g., a list of cells, list of tracking area identifiers, list of routing area identifiers (e.g., for radio resource control inactive state UEs) , or any combination thereof.

UE 115-a may perform on-demand system information acquisition logging within a configured logging area and logging duration, according to the logged measurement configuration. In some examples, UE 115-a may perform on-demand system information acquisition logging when UE 115-a is in a certain radio resource control state (e.g., idle state, inactive state, or connected mode) . UE 115-a may, in some examples, indicate to base station 105-a that it is available for on-demand system information acquisition logging. For example, UE 115-a may transmit an indicator (also referred to as logMeasAvailableOSI) that indicates an availability to provide on-demand system information acquisition report 215. The on-demand system information acquisition report 215 may include measurement reporting parameters, which may include a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.

In some examples, the indicator may be transmitted as part of a random access message (e.g., msg 5) during transition of UE 115-a to a radio resource control connected state. The random access message may be, with reference to random access procedures, a radio resource control setup complete message, a radio resource control reconfiguration complete message, a radio resource control resume complete message, or a radio resource control reestablishment complete message, or any combination thereof. Alternatively, UE 115-a indicate to base station 105-a that it is available to provide on-demand system information acquisition logging via dedicated radio resource control signaling when UE 115-a is in a radio resource control connected state. Base station 105-a may use the indicator (e.g., on-demand mechanism) to retrieve the logged information associated with the on-demand system information measurement (e.g., via radio resource control signaling) . Accordingly, the techniques described above may provide improvements to on-demand system information acquisition information collection, which may provide efficacy to base station 105-a and UE 115-a by reducing or eliminating latencies associated with processes related to on-demand system information acquisition.

FIG. 3 illustrates an example of a process flow 300 that supports access procedure reporting in accordance with aspects of the present disclosure. In some examples, process flow 300 may implement aspects of

wireless communication systems

100 and 200. For example, process flow 300 may include base station 105-b and UE 115-b, which may be examples of corresponding devices described with reference to FIGs. 1 and 2. In some examples, process flow 300 may provide improvements to random access reports of different random access procedures. In some examples, a random access report may support inclusion of certain information (e.g., cause of a random access procedure, logging a cause of a random access procedure, or a result of a random access procedure, or any combination thereof) according to an outcome of a random access procedure, such as a successful random access procedure or a failed random access procedure. Additionally, or alternatively, improvements to random access reports may include supporting on-demand system information random access information collection.

In the following description of process flow 300, the operations between base station 105-b and UE 115-b may be transmitted in a different order than the exemplary order shown, or the operations performed by base station 105-b and UE 115-b may be performed in different orders or at different times. Certain operations may also be omitted from process flow 300, and/or other operations may be added to process flow 300.

At 305, UE 115-b may identify a trigger for performing a random access procedure (e.g., a two-step random access procedure, a four-step random access procedure) . In some examples, the trigger may include a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof. In other examples, the trigger may be a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery.

At 310, UE 115-b may perform a successful random access procedure based on the trigger. At 315, UE 115-b may log information associated with the successful random access procedure. In some examples, the information may include a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof. UE 115-b may, in some examples, receive a logging configuration from base station 105-b. The logging configuration may configure UE 115-b to log a number of previous random access attempts, or to log previous random access attempts occurring with a time window, or the like. Base station 105-b may transmit the logging configuration as a logged MDT configuration, or an RRM configuration, or the like.

At 320, UE 115-b may transmit a random access report to base station 105-b. For example, UE 115-b may transmit a random access report based on the successful random access procedure. In some examples, UE 115-b may receive an information request message from base station 105-b. Here, UE 115-b may transmit the random access report based on the information request message. The random access report may include a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof.

The operations performed by base station 105-b and UE 115-b as part of, but not limited to, process flow 300 may provide improvements in random access reporting (e.g., inclusion of certain information, such as, but not limited to, cause of a random access procedure, logging a cause of a random access procedure, or a result of a random access procedure, or any combination thereof) . Additionally, or alternatively, the operations performed by base station 105-b and UE 115-b as part of, but not limited to, process flow 300 may provide improvements in random access reporting reports by supporting on-demand system information random access information collection. By communicating certain information in random access reporting and on-demand system information random access information collection between base station 105-b and UE 115-b, operational characteristics, such as power consumption related to random access procedures may be reduced.

FIG. 4 illustrates an example of a process flow 400 that supports access procedure reporting in accordance with aspects of the present disclosure. In some examples, process flow 400 may implement aspects of

wireless communication systems

100 and 200. For example, process flow 400 may include base station 105-c and UE 115-c, which may be examples of corresponding devices described with reference to FIGs. 1 and 2. In some examples, process flow 400 may provide improvements to random reports of different random access procedures. In some examples, a random access report may support inclusion of certain information according to an outcome of a random access procedure, such as a successful random access procedure or a failed random access procedure. Additionally, or alternatively, improvements to random access reports may include supporting on-demand system information random access information collection.

In the following description of process flow 400, the operations between base station 105-c and UE 115-c may be transmitted in a different order than the exemplary order shown, or the operations performed by base station 105-c and UE 115-c may be performed in different orders or at different times. Certain operations may also be omitted from process flow 400, and/or other operations may be added to process flow 400.

At 405, UE 115-c may identify a trigger for performing a random access procedure (e.g., a two-step random access procedure, a four-step random access procedure) . In some examples, the trigger may include a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof. At 410, UE 115-c may perform an unsuccessful random access procedure based on the trigger.

At 415, UE 115-c may generate a random access failure report including a radio resource control connection establishment failure report. The random access failure report may include an indication of the trigger, a synchronization signal block index, or both. In some examples, the random access failure report may include an indication of multiple random access procedure failures. At 420, UE 115-c may transmit the random access failure report to base station 105-c.

The operations performed by base station 105-c and UE 115-c as part of, but not limited to, process flow 400 may provide improvements in random access reporting. Additionally, or alternatively, the operations performed by base station 105-c and UE 115-c as part of, but not limited to, process flow 400 may provide improvements in random access reporting by supporting on-demand system information random access information collection. The operations performed by base station 105-c and UE 115-c may as part of, but not limited to, process flow 400 provide benefits and enhancements to the operation of UE 115-c.

FIG. 5 illustrates an example of a process flow 500 that supports access procedure reporting in accordance with aspects of the present disclosure. In some examples, process flow 500 may implement aspects of

wireless communication systems

100 and 200. For example, process flow 500 may include base station 105-d and UE 115-d, which may be examples of corresponding devices described with reference to FIGs. 1 and 2. In some examples, process flow 500 may provide improvements to random access reports. In some examples, a random access report may support inclusion of certain information according to an outcome of a random access procedure, such as a successful random access procedure or a failed random access procedure. Additionally, or alternatively, improvements to random access reports may include supporting on-demand system information random access information collection.

In the following description of process flow 500, the operations between base station 105-d and UE 115-d may be transmitted in a different order than the exemplary order shown, or the operations performed by base station 105-d and UE 115-d may be performed in different orders or at different times. Certain operations may also be omitted from process flow 500, and/or other operations may be added to process flow 500.

At 505, UE 115-d may receive a logged measurement configuration. In some examples, UE 115-d may identify on-demand system information measurement configuration parameters based on the logged measurement configuration. The on-demand system information measurement configuration parameters may include a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a broadcast by a base station, or a combination thereof. In some examples, the logged measurement configuration may be received when UE 115-d is in a radio resource control connected state. In other examples, the logged measurement configuration may be received when UE 115-d is transitioned from a radio resource control connected state to a radio resource control inactive state. Alternatively, the logged measurement configuration may be received when UE 115-d is transitioned from a radio resource control connected state to a radio resource control idle state. In some examples, the logged measurement configuration may be received when UE 115-d is transitioned from a radio resource control inactive state back to the radio resource control inactive state.

At 510, UE 115-d may log information associated with an on-demand system information measurement based on the logged measurement configuration. At 515, UE 115-d may transmit on-demand system information acquisition report to base station 105-d. The on-demand system information acquisition report may include measurement reporting parameters, which may include a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.

The operations performed by base station 105-d and UE 115-d as part of, but not limited to, process flow 500 may provide improvements in random access reports. Additionally, or alternatively, the operations performed by base station 105-d and UE 115-d as part of, but not limited to, process flow 500 may provide improvements in random access reports by supporting on-demand system information random access information collection. Furthermore, the operations performed by base station 105-d and UE 115-d as part of, but not limited to, process flow 500 may provide benefits and enhancements to the operation of UE 115-d. For example, by communicating certain information in random access reports and on-demand system information random access information collection between base station 105-d and UE 115-d, the operational characteristics, such as power consumption, processor utilization, and memory usage related to random access procedure may be reduced. The operations performed by base station 105-d and UE 115-d as part of, but not limited to, process flow 500 may also provide efficiency to UE 115-d by reducing latency associated with processes related to initial channel access, and more specifically to establish a connection with base station 105-d.

FIG. 6 shows a block diagram 600 of a device 605 that supports access procedure reporting in accordance with aspects of the present disclosure. The device 605 may be an example of aspects of a UE 115 as described herein. The device 605 may include a receiver 610, a communications manager 615, and a transmitter 620. The device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to access procedure reporting, etc. ) . Information may be passed on to other components of the device 605. The receiver 610 may be an example of aspects of the transceiver 920 described with reference to FIG. 9. The receiver 610 may utilize a single antenna or a set of antennas.

The communications manager 615 may identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and log information associated with the successful random access procedure. The communications manager 615 may also identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and transmit a random access failure report based on the unsuccessful random access procedure. The communications manager 615 may also receive a logged measurement configuration, log information associated with an on-demand system information measurement based on the logged measurement configuration, and transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement. The communications manager 615 may be an example of aspects of the communications manager 910 described herein.

The communications manager 615, or its sub-components, may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 615, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

The communications manager 615, or its sub-components, may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components. In some examples, the communications manager 615, or its sub-components, may be a separate and distinct component in accordance with various aspects of the present disclosure. In some examples, the communications manager 615, or its sub-components, may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.

The transmitter 620 may transmit signals generated by other components of the device 605. In some examples, the transmitter 620 may be collocated with a receiver 610 in a transceiver module. For example, the transmitter 620 may be an example of aspects of the transceiver 920 described with reference to FIG. 9. The transmitter 620 may utilize a single antenna or a set of antennas.

FIG. 7 shows a block diagram 700 of a device 705 that supports access procedure reporting in accordance with aspects of the present disclosure. The device 705 may be an example of aspects of a device 605, or a UE 115 as described herein. The device 705 may include a receiver 710, a communications manager 715, and a transmitter 745. The device 705 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 710 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to access procedure reporting, etc. ) . Information may be passed on to other components of the device 705. The receiver 710 may be an example of aspects of the transceiver 920 described with reference to FIG. 9. The receiver 710 may utilize a single antenna or a set of antennas.

The communications manager 715 may be an example of aspects of the communications manager 615 as described herein. The communications manager 715 may include a trigger component 720, an access procedure component 725, a log component 730, a report component 735, and a configuration component 740. The communications manager 715 may be an example of aspects of the communications manager 910 described herein.

The trigger component 720 may identify a trigger for performing a random access procedure. The access procedure component 725 may perform a successful random access procedure based on the trigger. The access procedure component 725 may perform an unsuccessful random access procedure based on the trigger. The log component 730 may log information associated with the successful random access procedure. The log component 730 may log information associated with an on-demand system information measurement based on the logged measurement configuration. The report component 735 may transmit a random access failure report based on the unsuccessful random access procedure. The report component 735 may transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement. The configuration component 740 may receive a logged measurement configuration.

The transmitter 745 may transmit signals generated by other components of the device 705. In some examples, the transmitter 745 may be collocated with a receiver 710 in a transceiver module. For example, the transmitter 745 may be an example of aspects of the transceiver 920 described with reference to FIG. 9. The transmitter 745 may utilize a single antenna or a set of antennas.

FIG. 8 shows a block diagram 800 of a communications manager 805 that supports access procedure reporting in accordance with aspects of the present disclosure. The communications manager 805 may be an example of aspects of a communications manager 615, a communications manager 715, or a communications manager 910 described herein. The communications manager 805 may include a trigger component 810, an access procedure component 815, a log component 820, a report component 825, a configuration component 830, a parameter component 835, and an indication component 840. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .

The trigger component 810 may identify a trigger for performing a random access procedure. In some examples, the trigger component 810 may transmit a trigger for a request for on-demand system information. In some examples, the trigger component 810 may receive the request for on-demand system information based on the trigger, where transmitting the on-demand system information acquisition report is further based on the request for on-demand system information. In some cases, the trigger for performing the random access procedure includes a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery. In some cases, the trigger for performing the random access procedure includes a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof. In some cases, the trigger includes an on-demand system information request.

The access procedure component 815 may perform a successful random access procedure based on the trigger. In some examples, the access procedure component 815 may perform an unsuccessful random access procedure based on the trigger.

The log component 820 may log information associated with the successful random access procedure. In some examples, the log component 820 may log information associated with an on-demand system information measurement based on the logged measurement configuration. In some cases, the information associated with the successful random access procedure includes a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof.

The report component 825 may transmit a random access failure report based on the unsuccessful random access procedure. In some examples, the report component 825 may transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement. In some examples, the report component 825 may transmit a random access report based on the successful random access procedure. In some examples, the report component 825 may receive an information request message, where transmitting the random access report is further based on the information request message. In some cases, the random access report includes a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof.

In some cases, a default reporting configuration includes transmitting the random access report for a last successful random access procedure. In some cases, the random access failure report includes a radio resource control connection establishment failure report. In some cases, the random access failure report includes an indication of the trigger, a synchronization signal block index, or both. In some cases, the random access failure report is transmitted as a radio resource control connection establishment failure report, and where the random access failure report includes an indication of the trigger. In some cases, the random access failure report includes an indication of a set of random access procedure failures.

The configuration component 830 may receive a logged measurement configuration. In some examples, the configuration component 830 may receive a logging configuration. In some examples, the configuration component 830 may log the information associated with the successful random access procedure is based on the logging configuration. In some cases, the logging configuration configures the UE to log a number of previous random access attempts. In some cases, the logging configuration configures the UE to log previous random access attempts occurring with a time window. In some cases, the logging configuration is received as a logged MDT configuration. In some cases, the logging configuration is received as an RRM configuration. In some cases, the logged measurement configuration is received when the UE is in a radio resource control connected state.

In some cases, the logged measurement configuration is received when the UE is transitioned from a radio resource control connected state to a radio resource control inactive state. In some cases, the logged measurement configuration is received as part of a suspend message. In some cases, the logged measurement configuration is received when the UE is transitioned from a radio resource control connected state to a radio resource control idle state. In some cases, the logged measurement configuration is received as part of a radio resource control release message. In some cases, the logged measurement configuration is received when the UE is transitioned from a radio resource control inactive state back to the radio resource control inactive state.

The parameter component 835 may identify on-demand system information measurement configuration parameters based on the logged measurement configuration. In some cases, the on-demand system information measurement configuration parameters include a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a broadcast by a base station, or a combination thereof. In some cases, the on-demand system information acquisition report includes measurement reporting parameters. In some cases, the measurement reporting parameters include a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.

The indication component 840 may transmit an indicator that indicates an availability of the on-demand system information acquisition report. In some cases, the indicator is transmitted in a random access message during transition of the UE to a radio resource control connected state. In some cases, the indicator is transmitted in a dedicated radio resource control signaling.

FIG. 9 shows a diagram of a system 900 including a device 905 that supports access procedure reporting in accordance with aspects of the present disclosure. The device 905 may be an example of or include the components of device 605, device 705, or a UE 115 as described herein. The device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 910, an I/O controller 915, a transceiver 920, an antenna 925, memory 930, and a processor 940. These components may be in electronic communication via one or more buses (e.g., bus 945) .

The communications manager 910 may identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and log information associated with the successful random access procedure. The communications manager 910 may also identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and transmit a random access failure report based on the unsuccessful random access procedure. The communications manager 910 may also receive a logged measurement configuration, log information associated with an on-demand system information measurement based on the logged measurement configuration, and transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement.

The I/O controller 915 may manage input and output signals for the device 905. The I/O controller 915 may also manage peripherals not integrated into the device 905. In some cases, the I/O controller 915 may represent a physical connection or port to an external peripheral. In some cases, the I/O controller 915 may utilize an operating system such as

or another known operating system. In other cases, the I/O controller 915 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller 915 may be implemented as part of a processor. In some cases, a user may interact with the device 905 via the I/O controller 915 or via hardware components controlled by the I/O controller 915.

The transceiver 920 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver 920 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 920 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. In some cases, the device 905 may include a single antenna 925. However, in some cases the device 905 may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory 930 may include RAM and ROM. The memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 930 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor 940 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the processor 940 may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting access procedure reporting) .

The code 935 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code 935 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 935 may not be directly executable by the processor 940 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

FIG. 10 shows a block diagram 1000 of a device 1005 that supports access procedure reporting in accordance with aspects of the present disclosure. The device 1005 may be an example of aspects of a base station 105 as described herein. The device 1005 may include a receiver 1010, a communications manager 1015, and a transmitter 1020. The device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to access procedure reporting, etc. ) . Information may be passed on to other components of the device 1005. The receiver 1010 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The receiver 1010 may utilize a single antenna or a set of antennas.

The communications manager 1015 may identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and receive a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure. The communications manager 1015 may also identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and receive a random access failure report based on the unsuccessful random access procedure. The communications manager 1015 may also transmit a logged measurement configuration and receive an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration. The communications manager 1015 may be an example of aspects of the communications manager 1310 described herein.

The communications manager 1015, or its sub-components, may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 1015, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

The communications manager 1015, or its sub-components, may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components. In some examples, the communications manager 1015, or its sub-components, may be a separate and distinct component in accordance with various aspects of the present disclosure. In some examples, the communications manager 1015, or its sub-components, may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.

The transmitter 1020 may transmit signals generated by other components of the device 1005. In some examples, the transmitter 1020 may be collocated with a receiver 1010 in a transceiver module. For example, the transmitter 1020 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The transmitter 1020 may utilize a single antenna or a set of antennas.

FIG. 11 shows a block diagram 1100 of a device 1105 that supports access procedure reporting in accordance with aspects of the present disclosure. The device 1105 may be an example of aspects of a device 1005, or a base station 105 as described herein. The device 1105 may include a receiver 1110, a communications manager 1115, and a transmitter 1140. The device 1105 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 1110 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to access procedure reporting, etc. ) . Information may be passed on to other components of the device 1105. The receiver 1110 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The receiver 1110 may utilize a single antenna or a set of antennas.

The communications manager 1115 may be an example of aspects of the communications manager 1015 as described herein. The communications manager 1115 may include a trigger component 1120, an access procedure component 1125, a report component 1130, and a configuration component 1135. The communications manager 1115 may be an example of aspects of the communications manager 1310 described herein.

The trigger component 1120 may identify a trigger for performing a random access procedure. The access procedure component 1125 may perform a successful random access procedure based on the trigger. The access procedure component 1125 may perform an unsuccessful random access procedure based on the trigger. The report component 1130 may receive a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure. The report component 1130 may receive a random access failure report based on the unsuccessful random access procedure. The report component 1130 may receive an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration. The configuration component 1135 may transmit a logged measurement configuration.

The transmitter 1140 may transmit signals generated by other components of the device 1105. In some examples, the transmitter 1140 may be collocated with a receiver 1110 in a transceiver module. For example, the transmitter 1140 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The transmitter 1140 may utilize a single antenna or a set of antennas.

FIG. 12 shows a block diagram 1200 of a communications manager 1205 that supports access procedure reporting in accordance with aspects of the present disclosure. The communications manager 1205 may be an example of aspects of a communications manager 1015, a communications manager 1115, or a communications manager 1310 described herein. The communications manager 1205 may include a trigger component 1210, an access procedure component 1215, a report component 1220, a configuration component 1225, a parameter component 1230, and an indication component 1235. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .

The trigger component 1210 may identify a trigger for performing a random access procedure. In some examples, the trigger component 1210 may receive a trigger for a request for on-demand system information. In some examples, the trigger component 1210 may transmit the request for on-demand system information based on the trigger, where receiving the on-demand system information acquisition report is further based on the request for on-demand system information. In some cases, the trigger for performing the random access procedure includes a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery. In some cases, the trigger for performing the random access procedure includes a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof.

The access procedure component 1215 may perform a successful random access procedure based on the trigger. In some examples, the access procedure component 1215 may perform an unsuccessful random access procedure based on the trigger.

The report component 1220 may receive a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure. In some examples, the report component 1220 may receive a random access failure report based on the unsuccessful random access procedure. In some examples, receiving an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration. In some examples, the report component 1220 may transmit an information request message, where receiving the random access report is further based on the information request message. In some cases, the random access report includes a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof. In some cases, a default reporting configuration includes receiving the random access report for a last successful random access procedure.

In some cases, the logged information associated with the successful random access procedure includes a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof. In some cases, the random access failure report includes a radio resource control connection establishment failure report. In some cases, the random access failure report includes an indication of the trigger, a synchronization signal block index, or both. In some cases, the random access failure report is transmitted as a radio resource control connection establishment failure report, and where the random access failure report includes an indication of the trigger. In some cases, the random access failure report includes an indication of a set of random access procedure failures. In some cases, the on-demand system information acquisition report includes measurement reporting parameters. In some cases, the measurement reporting parameters include a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.

The configuration component 1225 may transmit a logged measurement configuration. In some examples, the configuration component 1225 may transmit a logging configuration to a UE. In some cases, the logging configuration configures the UE to log a number of previous random access attempts. In some cases, the logging configuration configures the UE to log previous random access attempts occurring with a time window. In some cases, the logging configuration is transmitted as an RRM configuration. In some cases, the logged measurement configuration is transmitted when a UE is in a radio resource control connected state. In some cases, the logged measurement configuration is transmitted when a UE is transitioned from a radio resource control connected state to a radio resource control inactive state. In some cases, the logged measurement configuration is transmitted as part of a suspend message. In some cases, the logged measurement configuration is transmitted when a UE is transitioned from a radio resource control connected state to a radio resource control idle state. In some cases, the logged measurement configuration is transmitted as part of a radio resource control release message. In some cases, the logged measurement configuration is transmitted when a UE is transitioned from a radio resource control inactive state back to the radio resource control inactive state.

The parameter component 1230 may identify on-demand system information measurement configuration parameters based on the logged measurement configuration. In some cases, the on-demand system information measurement configuration parameters include a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a broadcast by a base station, or a combination thereof. The indication component 1235 may receive an indicator that indicates an availability of the on-demand system information acquisition report. In some cases, the indicator is received in a random access message during transition of a UE to a radio resource control connected state.

FIG. 13 shows a diagram of a system 1300 including a device 1305 that supports access procedure reporting in accordance with aspects of the present disclosure. The device 1305 may be an example of or include the components of device 1005, device 1105, or a base station 105 as described herein. The device 1305 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1310, a network communications manager 1315, a transceiver 1320, an antenna 1325, memory 1330, a processor 1340, and an inter-station communications manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350) .

The communications manager 1310 may identify a trigger for performing a random access procedure, perform a successful random access procedure based on the trigger, and receive a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure. The communications manager 1310 may also identify a trigger for performing a random access procedure, perform an unsuccessful random access procedure based on the trigger, and receive a random access failure report based on the unsuccessful random access procedure. The communications manager 1310 may also transmit a logged measurement configuration and receive an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration.

The network communications manager 1315 may manage communications with the core network (e.g., via one or more wired backhaul links) . For example, the network communications manager 1315 may manage the transfer of data communications for client devices, such as one or more UEs 115.

The transceiver 1320 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver 1320 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1320 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. In some cases, the device 1305 may include a single antenna 1325. However, in some cases the device 1305 may have more than one antenna 1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory 1330 may include RAM, ROM, or a combination thereof. The memory 1330 may store computer-readable code 1335 including instructions that, when executed by a processor (e.g., the processor 1340) cause the device to perform various functions described herein. In some cases, the memory 1330 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor 1340 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the processor 1340 may be configured to operate a memory array using a memory controller. In some cases, a memory controller may be integrated into processor 1340. The processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting access procedure reporting) .

The inter-station communications manager 1345 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1345 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1345 may provide an X2 interface within an LTE/LTE-Awireless communication network technology to provide communication between base stations 105.

The code 1335 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code 1335 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1335 may not be directly executable by the processor 1340 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

FIG. 14 shows a flowchart illustrating a method 1400 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 1400 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1400 may be performed by a communications manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally, or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At 1405, the UE may identify a trigger for performing a random access procedure. The operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed by a trigger component as described with reference to FIGs. 6 through 9.

At 1410, the UE may perform a successful random access procedure based on the trigger. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed by an access procedure component as described with reference to FIGs. 6 through 9.

At 1415, the UE may log information associated with the successful random access procedure. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed by a log component as described with reference to FIGs. 6 through 9.

FIG. 15 shows a flowchart illustrating a method 1500 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 1500 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1500 may be performed by a communications manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally, or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At 1505, the UE may identify a trigger for performing a random access procedure. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a trigger component as described with reference to FIGs. 6 through 9.

At 1510, the UE may perform a successful random access procedure based on the trigger. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by an access procedure component as described with reference to FIGs. 6 through 9.

At 1515, the UE may log information associated with the successful random access procedure. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed by a log component as described with reference to FIGs. 6 through 9.

At 1520, the UE may transmit a random access report based on the successful random access procedure. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed by a report component as described with reference to FIGs. 6 through 9.

FIG. 16 shows a flowchart illustrating a method 1600 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 1600 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1600 may be performed by a communications manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally, or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At 1605, the UE may identify a trigger for performing a random access procedure. The operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed by a trigger component as described with reference to FIGs. 6 through 9.

At 1610, the UE may perform an unsuccessful random access procedure based on the trigger. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed by an access procedure component as described with reference to FIGs. 6 through 9.

At 1615, the UE may transmit a random access failure report based on the unsuccessful random access procedure. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed by a report component as described with reference to FIGs. 6 through 9.

FIG. 17 shows a flowchart illustrating a method 1700 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 1700 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1700 may be performed by a communications manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally, or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At 1705, the UE may receive a logged measurement configuration. The operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed by a configuration component as described with reference to FIGs. 6 through 9.

At 1710, the UE may log information associated with an on-demand system information measurement based on the logged measurement configuration. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed by a log component as described with reference to FIGs. 6 through 9.

At 1715, the UE may transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement. The operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed by a report component as described with reference to FIGs. 6 through 9.

FIG. 18 shows a flowchart illustrating a method 1800 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 1800 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1800 may be performed by a communications manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally, or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.

At 1805, the UE may receive a logged measurement configuration. The operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed by a configuration component as described with reference to FIGs. 6 through 9.

At 1810, the UE may log information associated with an on-demand system information measurement based on the logged measurement configuration. The operations of 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of 1810 may be performed by a log component as described with reference to FIGs. 6 through 9.

At 1815, the UE may transmit a trigger for a request for on-demand system information. The operations of 1815may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be performed by a trigger component as described with reference to FIGs. 6 through 9.

At 1820, the UE may transmit an on-demand system information acquisition report based on the information associated with the on-demand system information measurement. The operations of 1820 may be performed according to the methods described herein. In some examples, aspects of the operations of 1820 may be performed by a report component as described with reference to FIGs. 6 through 9.

FIG. 19 shows a flowchart illustrating a method 1900 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 1900 may be implemented by a base station 105 or its components as described herein. For example, the operations of method 1900 may be performed by a communications manager as described with reference to FIGs. 10 through 13. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally, or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.

At 1905, the base station may identify a trigger for performing a random access procedure. The operations of 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed by a trigger component as described with reference to FIGs. 10 through 13.

At 1910, the base station may perform a successful random access procedure based on the trigger. The operations of 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed by an access procedure component as described with reference to FIGs. 10 through 13.

At 1915, the base station may receive a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure. The operations of 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed by a report component as described with reference to FIGs. 10 through 13.

FIG. 20 shows a flowchart illustrating a method 2000 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 2000 may be implemented by a base station 105 or its components as described herein. For example, the operations of method 2000 may be performed by a communications manager as described with reference to FIGs. 10 through 13. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally, or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.

At 2005, the base station may identify a trigger for performing a random access procedure. The operations of 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed by a trigger component as described with reference to FIGs. 10 through 13.

At 2010, the base station may perform an unsuccessful random access procedure based on the trigger. The operations of 2010 may be performed according to the methods described herein. In some examples, aspects of the operations of 2010 may be performed by an access procedure component as described with reference to FIGs. 10 through 13.

At 2015, the base station may receive a random access failure report based on the unsuccessful random access procedure. The operations of 2015 may be performed according to the methods described herein. In some examples, aspects of the operations of 2015 may be performed by a report component as described with reference to FIGs. 10 through 13.

FIG. 21 shows a flowchart illustrating a method 2100 that supports access procedure reporting in accordance with aspects of the present disclosure. The operations of method 2100 may be implemented by a base station 105 or its components as described herein. For example, the operations of method 2100 may be performed by a communications manager as described with reference to FIGs. 10 through 13. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally, or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.

At 2105, the base station may transmit a logged measurement configuration. The operations of 2105 may be performed according to the methods described herein. In some examples, aspects of the operations of 2105 may be performed by a configuration component as described with reference to FIGs. 10 through 13.

At 2110, the base station may receive an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration. The operations of 2110 may be performed according to the methods described herein. In some examples, aspects of the operations of 2110 may be performed by a report component as described with reference to FIGs. 10 through 13.

It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.

Embodiment 1: A method of wireless communications at a UE is described. The method may include identifying a trigger for performing a random access procedure, performing a successful random access procedure based on the trigger, and logging information associated with the successful random access procedure.

Embodiment 2: The method of embodiment 1, further comprising: transmitting a random access report based on the successful random access procedure.

Embodiment 3: The method of embodiment 2, further comprising: receiving an information request message, wherein transmitting the random access report is further based at least in part on the information request message.

Embodiment 4: The method of embodiment 2, wherein the random access report comprises a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof.

Embodiment 5: The method of embodiment 2, wherein a default reporting configuration comprises transmitting the random access report for a last successful random access procedure.

Embodiment 6: The method of any of embodiments 2 to 5, further comprising: receiving a logging configuration.

Embodiment 7: The method of embodiment 6, wherein logging the information associated with the successful random access procedure is based at least in part on the logging configuration.

Embodiment 8: The method of embodiment 6, wherein the logging configuration configures the UE to log a number of previous random access attempts.

Embodiment 9: The method of embodiment 6, wherein the logging configuration configures the UE to log previous random access attempts occurring with a time window.

Embodiment 10: The method of embodiment 6, wherein the logging configuration is received as a logged minimization of driving tests (MDT) configuration.

Embodiment 11: The method of embodiment 6, wherein the logging configuration is received as a radio resource management (RRM) configuration.

Embodiment 12: The method of any of embodiments 1 to 11, wherein the information associated with the successful random access procedure comprises a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof.

Embodiment 13: The method of any of embodiments 1 to 12, wherein the trigger for performing the random access procedure comprises a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery.

Embodiment 14: The method of any of embodiments 1 to 12, wherein the trigger for performing the random access procedure comprises a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof.

Embodiment 15: An apparatus for wireless communications comprising at least one means for performing a method of any of embodiments 1 to 14.

Embodiment 16: An apparatus for wireless communications comprising a processor; memory in electronic communication with the processor; and instructions in the memory and executable by the processor to cause the apparatus to perform a method of any of embodiments 1 to 14.

Embodiment 17: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of embodiments 1 to 14.

Embodiment 18: A method for wireless communications, comprising: identifying a trigger for performing a random access procedure, performing an unsuccessful random access procedure based on the trigger, and transmitting a random access failure report based on the unsuccessful random access procedure.

Embodiment 19: The method of embodiment 15, wherein the random access failure report comprises a radio resource control connection establishment failure report.

Embodiment 20: The method of embodiment 16, wherein the random access failure report comprises an indication of the trigger, a synchronization signal block index, or both.

Embodiment 21: The method of embodiment 15, wherein the random access failure report is transmitted as a radio resource control connection establishment failure report, and wherein the random access failure report comprises an indication of the trigger.

Embodiment 22: The method of any of embodiments 15 to 18, wherein the random access failure report comprises an indication of a plurality of random access procedure failures.

Embodiment 23: An apparatus for wireless communications comprising at least one means for performing a method of any of embodiments 18 to 22.

Embodiment 24: An apparatus for wireless communications comprising a processor; memory in electronic communication with the processor; and instructions in the memory and executable by the processor to cause the apparatus to perform a method of any of embodiments 18 to 22.

Embodiment 25: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of embodiments 18 to 22.

Embodiment 26: A method of wireless communications comprising: receiving a logged measurement configuration, logging information associated with an on-demand system information measurement based on the logged measurement configuration, and transmitting an on-demand system information acquisition report based on the information associated with the on-demand system information measurement.

Embodiment 27: The method of embodiment 26, further comprising: identifying on-demand system information measurement configuration parameters based at least in part on the logged measurement configuration.

Embodiment 28: The method of embodiment 27, wherein the on-demand system information measurement configuration parameters comprise a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a broadcast by a base station, or a combination thereof.

Embodiment 29: The method of any of embodiments 26 to 28, further comprising: transmitting a trigger for a request for on-demand system information.

Embodiment 30: The method of embodiment 29, wherein the trigger comprises an on-demand system information request.

Embodiment 31: The method of embodiment 29, further comprising: receiving the request for on-demand system information based at least in part on the trigger, wherein transmitting the on-demand system information acquisition report is further based at least in part on the request for on-demand system information.

Embodiment 32: The method of any of embodiments 26 to 31, further comprising: transmitting an indicator that indicates an availability of the on-demand system information acquisition report.

Embodiment 33: The method of embodiment 32, wherein the indicator is transmitted in a random access message during transition of the UE to a radio resource control connected state.

Embodiment 34: The method of embodiment 32, wherein the indicator is transmitted in a dedicated radio resource control signaling.

Embodiment 35: The method of any of embodiments 26 to 34, wherein the logged measurement configuration is received when the UE is in a radio resource control connected state.

Embodiment 36: The method of any of embodiments 26 to 34, wherein the logged measurement configuration is received when the UE is transitioned from a radio resource control connected state to a radio resource control inactive state.

Embodiment 37: The method of embodiment 36, wherein the logged measurement configuration is received as part of a suspend message.

Embodiment 38: The method of any of embodiments 26 to 37, wherein the logged measurement configuration is received when the UE is transitioned from a radio resource control connected state to a radio resource control idle state.

Embodiment 39: The method of embodiment 38, wherein the logged measurement configuration is received as part of a radio resource control release message.

Embodiment 40: The method of any of embodiments 26 to 39, wherein the logged measurement configuration is received when the UE is transitioned from a radio resource control inactive state back to the radio resource control inactive state.

Embodiment 41: The method of embodiment 40, wherein the logged measurement configuration is received as part of a suspend message.

Embodiment 42: The method of any of embodiments 26 to 41, wherein the on-demand system information acquisition report comprises measurement reporting parameters.

Embodiment 43: The method of embodiment 42, wherein the measurement reporting parameters comprise a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.

Embodiment 44: An apparatus for wireless communications comprising at least one means for performing a method of any of embodiments 26 to 43.

Embodiment 45: An apparatus for wireless communications comprising a processor; memory in electronic communication with the processor; and instructions in the memory and executable by the processor to cause the apparatus to perform a method of any of embodiments 26 to 43.

Embodiment 46: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of embodiments 26 to 43.

Embodiment 47: A method for wireless communications, comprising: identifying a trigger for performing a random access procedure, performing a successful random access procedure based on the trigger, and receiving a random access report based on the successful random access procedure, where the random access report includes logged information associated with the random access procedure.

Embodiment 48: The method of embodiment 47, further comprising: transmitting an information request message, wherein receiving the random access report is further based at least in part on the information request message.

Embodiment 49: The method of embodiment 47, wherein the random access report comprises a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof.

Embodiment 50: The method of embodiment 47, wherein a default reporting configuration comprises receiving the random access report for a last successful random access procedure.

Embodiment 51: The method of any of embodiments 47 to 50, further comprising: transmitting a logging configuration to a UE.

Embodiment 52: The method of embodiment 51, wherein the logging configuration configures the UE to log a number of previous random access attempts.

Embodiment 53: The method of embodiment 51, wherein the logging configuration configures the UE to log previous random access attempts occurring with a time window.

Embodiment 54: The method of embodiment 51, wherein the logging configuration is transmitted as a radio resource management (RRM) configuration.

Embodiment 55: The method of embodiment 47, wherein the logged information associated with the successful random access procedure comprises a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof.

Embodiment 56: The method of embodiment 47, wherein the trigger for performing the random access procedure comprises a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery.

Embodiment 57: The method of embodiment 47, wherein the trigger for performing the random access procedure comprises a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof.

Embodiment 58: An apparatus for wireless communications comprising at least one means for performing a method of any of embodiments 47 to 57.

Embodiment 59: An apparatus for wireless communications comprising a processor; memory in electronic communication with the processor; and instructions in the memory and executable by the processor to cause the apparatus to perform a method of any of embodiments 47 to 57.

Embodiment 60: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of embodiments 47 to 57.

Embodiment 61: A method for wireless communications, comprising: identifying a trigger for performing a random access procedure, performing an unsuccessful random access procedure based on the trigger, and receiving a random access failure report based on the unsuccessful random access procedure.

Embodiment 62: The method of embodiment 61, wherein the random access failure report comprises a radio resource control connection establishment failure report.

Embodiment 63: The method of embodiment 62, wherein the random access failure report comprises an indication of the trigger, a synchronization signal block index, or both.

Embodiment 64: The method of embodiment 61, wherein the random access failure report is transmitted as a radio resource control connection establishment failure report, and wherein the random access failure report comprises an indication of the trigger.

Embodiment 65: The method of embodiment 61, wherein the random access failure report comprises an indication of a plurality of random access procedure failures.

Embodiment 66: An apparatus for wireless communications comprising at least one means for performing a method of any of embodiments 61 to 65.

Embodiment 67: An apparatus for wireless communications comprising a processor; memory in electronic communication with the processor; and instructions in the memory and executable by the processor to cause the apparatus to perform a method of any of embodiments 61 to 65.

Embodiment 68: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of embodiments 61 to 65.

Embodiment 69: A method for wireless communications, comprising: transmitting a logged measurement configuration and receiving an on-demand system information acquisition report, where the on-demand system information report includes logged information associated with an on-demand system information measurement that is based on the logged measurement configuration.

Embodiment 70: The method of embodiment 69, further comprising: identifying on-demand system information measurement configuration parameters based at least in part on the logged measurement configuration.

Embodiment 71: The method of embodiment 70, wherein the on-demand system information measurement configuration parameters comprise a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a broadcast by a base station, or a combination thereof.

Embodiment 72: The method of any of embodiments 69 to 71, further comprising: receiving a trigger for a request for on-demand system information.

Embodiment 73: The method of embodiment 72, further comprising: transmitting the request for on-demand system information based at least in part on the trigger, wherein receiving the on-demand system information acquisition report is further based at least in part on the request for on-demand system information.

Embodiment 74: The method of any of embodiments 69 to 73, further comprising: receiving an indicator that indicates an availability of the on-demand system information acquisition report.

Embodiment 75: The method of embodiment 74, wherein the indicator is received in a random access message during transition of a UE to a radio resource control connected state

Embodiment 76: The method of any of embodiments 69 to 75, wherein the logged measurement configuration is transmitted when a user equipment (UE) is in a radio resource control connected state.

Embodiment 77: The method of any of embodiments 69 to 76, wherein the logged measurement configuration is transmitted when a UE is transitioned from a radio resource control connected state to a radio resource control inactive state.

Embodiment 78: The method of embodiment 77, wherein the logged measurement configuration is transmitted as part of a suspend message.

Embodiment 79: The method of any of embodiments 69 to 78, wherein the logged measurement configuration is transmitted when a UE is transitioned from a radio resource control connected state to a radio resource control idle state.

Embodiment 80: The method of embodiment 79, wherein the logged measurement configuration is transmitted as part of a radio resource control release message.

Embodiment 81: The method of any of embodiments 69 to 80, wherein the logged measurement configuration is transmitted when a UE is transitioned from a radio resource control inactive state back to the radio resource control inactive state.

Embodiment 82: The method of embodiment 81, wherein the logged measurement configuration is transmitted as part of a suspend message.

Embodiment 83: The method of any of embodiments 69 to 82, wherein the on-demand system information acquisition report comprises measurement reporting parameters.

Embodiment 84: The method of embodiment 83, wherein the measurement reporting parameters comprise a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.

Embodiment 85: An apparatus for wireless communications comprising at least one means for performing a method of any of embodiments 69 to 84.

Embodiment 86: An apparatus for wireless communications comprising a processor; memory in electronic communication with the processor; and instructions in the memory and executable by the processor to cause the apparatus to perform a method of any of embodiments 69 to 84.

Embodiment 87: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of embodiments 69 to 84.

Techniques described herein may be used for various wireless communications systems such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal frequency division multiple access (OFDMA) , single carrier frequency division multiple access (SC-FDMA) , and other systems. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA) , etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD) , etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM) .

An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB) , Evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS) . LTE, LTE-A, and LTE-A Pro are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from the organization named “3rd Generation Partnership Project” (3GPP) . CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) . The techniques described herein may be used for the systems and radio technologies mentioned herein as well as other systems and radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR applications.

A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider. A small cell may be associated with a lower-powered base station, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed, etc. ) frequency bands as macro cells. Small cells may include pico cells, femto cells, and micro cells according to various examples. A pico cell, for example, may cover a small geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider. A femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) . An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.

The wireless communications systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.

Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an exemplary step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ”

In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.

The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “exemplary” used herein means “serving as an example, instance, or illustration, ” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable a person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein, but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

A method for wireless communications at a user equipment (UE) , comprising:

identifying a trigger for performing a random access procedure;

performing a successful random access procedure based at least in part on the trigger; and

logging information associated with the successful random access procedure.
The method of claim 1, further comprising:

transmitting a random access report based at least in part on the successful random access procedure.
The method of claim 2, further comprising:

receiving an information request message, wherein transmitting the random access report is further based at least in part on the information request message.
The method of claim 2, wherein the random access report comprises a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof.
The method of claim 2, wherein a default reporting configuration comprises transmitting the random access report for a last successful random access procedure.
The method of any of claims 1 to 5, further comprising:

receiving a logging configuration.
The method of claim 6, wherein logging the information associated with the successful random access procedure is based at least in part on the logging configuration.
The method of claim 6, wherein the logging configuration configures the UE to log a number of previous random access attempts.
The method of claim 6, wherein the logging configuration configures the UE to log previous random access attempts occurring with a time window.
The method of claim 6, wherein the logging configuration is received as a logged minimization of driving tests (MDT) configuration.
The method of claim 6, wherein the logging configuration is received as a radio resource management (RRM) configuration.
The method of any of claims 1 to 11, wherein the information associated with the successful random access procedure comprises a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof.
The method of any of claims 1 to 12, wherein the trigger for performing the random access procedure comprises a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery.
The method of any of claims 1 to 12, wherein the trigger for performing the random access procedure comprises a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof.
A method for wireless communications at a user equipment (UE) , comprising:

identifying a trigger for performing a random access procedure;

performing an unsuccessful random access procedure based at least in part on the trigger; and

transmitting a random access failure report based at least in part on the unsuccessful random access procedure.
The method of claim 15, wherein the random access failure report comprises a radio resource control connection establishment failure report.
The method of claim 16, wherein the random access failure report comprises an indication of the trigger, a synchronization signal block index, or both.
The method of claim 15, wherein the random access failure report is transmitted as a radio resource control connection establishment failure report, and wherein the random access failure report comprises an indication of the trigger.
The method of any of claims 15 to 18, wherein the random access failure report comprises an indication of a plurality of random access procedure failures.
A method for wireless communications at a user equipment (UE) , comprising:

receiving a logged measurement configuration;

logging information associated with an on-demand system information measurement based at least in part on the logged measurement configuration; and

transmitting an on-demand system information acquisition report based at least in part on the information associated with the on-demand system information measurement.
The method of claim 20, further comprising:

identifying on-demand system information measurement configuration parameters based at least in part on the logged measurement configuration.
The method of claim 21, wherein the on-demand system information measurement configuration parameters comprise a configuration of a trigger associated with logging events, a configuration of a logging area, a UE state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on- demand system information trigger until a broadcast by a base station, or a combination thereof.
The method of any of claims 20 to 22, further comprising:

transmitting a trigger for a request for on-demand system information.
The method of claim 23, wherein the trigger comprises an on-demand system information request.
The method of claim 23, further comprising:

receiving the request for on-demand system information based at least in part on the trigger, wherein transmitting the on-demand system information acquisition report is further based at least in part on the request for on-demand system information.
The method of any of claims 20 to 25, further comprising:

transmitting an indicator that indicates an availability of the on-demand system information acquisition report.
The method of claim 26, wherein the indicator is transmitted in a random access message during transition of the UE to a radio resource control connected state.
The method of claim 26, wherein the indicator is transmitted in a dedicated radio resource control signaling.
The method of any of claims 20 to 28, wherein the logged measurement configuration is received when the UE is in a radio resource control connected state.
The method of any of claims 20 to 28, wherein the logged measurement configuration is received when the UE is transitioned from a radio resource control connected state to a radio resource control inactive state.
The method of claim 30, wherein the logged measurement configuration is received as part of a suspend message.
The method of any of claims 20 to 31, wherein the logged measurement configuration is received when the UE is transitioned from a radio resource control connected state to a radio resource control idle state.
The method of claim 32, wherein the logged measurement configuration is received as part of a radio resource control release message.
The method of any of claims 20 to 33, wherein the logged measurement configuration is received when the UE is transitioned from a radio resource control inactive state back to the radio resource control inactive state.
The method of claim 34, wherein the logged measurement configuration is received as part of a suspend message.
The method of claim of any of claims 20 to 35, wherein the on-demand system information acquisition report comprises measurement reporting parameters.
The method of claim 36, wherein the measurement reporting parameters comprise a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.
A method for wireless communications at a network entity, comprising:

identifying a trigger for performing a random access procedure;

performing a successful random access procedure based at least in part on the trigger; and

receiving a random access report based at least in part on the successful random access procedure, wherein the random access report comprises logged information associated with the random access procedure.
The method of claim 38, further comprising:

transmitting an information request message, wherein receiving the random access report is further based at least in part on the information request message.
The method of claim 38, wherein the random access report comprises a cell identifier, a synchronization signal block index, a timestamp, an indication of the trigger, a preamble transmission counter parameter, a contention detection parameter, a preamble backoff parameter, location information, a beam reference signal received power, a beam reference signal received quality, a neighbor cell measurement, or a combination thereof.
The method of claim 38, wherein a default reporting configuration comprises receiving the random access report for a last successful random access procedure.
The method of any of claims 38 to 42, further comprising:

transmitting a logging configuration to a user equipment (UE) .
The method of claim 42, wherein the logging configuration configures the UE to log a number of previous random access attempts.
The method of claim 42, wherein the logging configuration configures the UE to log previous random access attempts occurring with a time window.
The method of claim 42, wherein the logging configuration is transmitted as a radio resource management (RRM) configuration.
The method of claim 38, wherein the logged information associated with the successful random access procedure comprises a cell identifier, a synchronization signal block index, a timestamp, a preamble transmission counter parameter, a preamble power ramping counter parameter, a preamble power ramping step parameter, a preamble received target power parameter, a preamble backoff parameter, a power control max parameter, a scaling factor parameter backoff indicator, a temporary cell radio network temporary identifier, a contention detection parameter, or a combination thereof.
The method of claim 38, wherein the trigger for performing the random access procedure comprises a trigger other than an initial access from radio resource control idle to radio resource control inactive, a radio resource control connection reestablishment, or a beam failure recovery.
The method of claim 38, wherein the trigger for performing the random access procedure comprises a radio resource control connection reestablishment, a beam failure recovery, a handover, a secondary control group modification, a time alignment for a secondary cell addition, an on-demand system information request, an arrival of downlink data when an uplink is out of synchronization, an arrival of uplink data in an absence of uplink control resources for a scheduling request report, a timing alignment acquisition for positioning, or a combination thereof.
A method for wireless communications at a network entity, comprising:

identifying a trigger for performing a random access procedure;

performing an unsuccessful random access procedure based at least in part on the trigger; and

receiving a random access failure report based at least in part on the unsuccessful random access procedure.
The method of claim 49, wherein the random access failure report comprises a radio resource control connection establishment failure report.
The method of claim 50, wherein the random access failure report comprises an indication of the trigger, a synchronization signal block index, or both.
The method of claim 49, wherein the random access failure report is transmitted as a radio resource control connection establishment failure report, and wherein the random access failure report comprises an indication of the trigger.
The method of claim 49, wherein the random access failure report comprises an indication of a plurality of random access procedure failures.
A method for wireless communications at a network entity, comprising:

transmitting a logged measurement configuration; and

receiving an on-demand system information acquisition report, wherein the on-demand system information report comprises logged information associated with an on- demand system information measurement that is based at least in part on the logged measurement configuration.
The method of claim 54, further comprising:

identifying on-demand system information measurement configuration parameters based at least in part on the logged measurement configuration.
The method of claim 55, wherein the on-demand system information measurement configuration parameters comprise a configuration of a trigger associated with logging events, a configuration of a logging area, a user equipment (UE) state of on-demand system information acquisition, an on-demand system information type, a time elapsed from an on-demand system information trigger until a broadcast by a base station, or a combination thereof.
The method of any of claims 54 to 56, further comprising:

receiving a trigger for a request for on-demand system information.
The method of claim 57, further comprising:

transmitting the request for on-demand system information based at least in part on the trigger, wherein receiving the on-demand system information acquisition report is further based at least in part on the request for on-demand system information.
The method of any of claims 54 to 58, further comprising:

receiving an indicator that indicates an availability of the on-demand system information acquisition report.
The method of claim 59, wherein the indicator is received in a random access message during transition of a user equipment (UE) to a radio resource control connected state.
The method of any of claims 54 to 60, wherein the logged measurement configuration is transmitted when a user equipment (UE) is in a radio resource control connected state.
The method of any of claims 54 to 61, wherein the logged measurement configuration is transmitted when a user equipment (UE) is transitioned from a radio resource control connected state to a radio resource control inactive state.
The method of claim 62, wherein the logged measurement configuration is transmitted as part of a suspend message.
The method of any of claims 54 to 63, wherein the logged measurement configuration is transmitted when a user equipment (UE) is transitioned from a radio resource control connected state to a radio resource control idle state.
The method of claim 64, wherein the logged measurement configuration is transmitted as part of a radio resource control release message.
The method of any of claims 54 to 65, wherein the logged measurement configuration is transmitted when a user equipment (UE) is transitioned from a radio resource control inactive state back to the radio resource control inactive state.
The method of claim 66, wherein the logged measurement configuration is transmitted as part of a suspend message.
The method of any of claims 54 to 67, wherein the on-demand system information acquisition report comprises measurement reporting parameters.
The method of claim 68, wherein the measurement reporting parameters comprise a time elapsed from the trigger until a system information broadcast by a base station, system information block mapping information, an on-demand system information message indicator, a radio resource control state indicator, an on-demand result indicator, or a combination thereof.
An apparatus for wireless communications, comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify a trigger for performing a random access procedure;

perform a successful random access procedure based at least in part on the trigger; and

log information associated with the successful random access procedure.
An apparatus for wireless communications, comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify a trigger for performing a random access procedure;

perform an unsuccessful random access procedure based at least in part on the trigger; and

transmit a random access failure report based at least in part on the unsuccessful random access procedure.
An apparatus for wireless communications, comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive a logged measurement configuration;

log information associated with an on-demand system information measurement based at least in part on the logged measurement configuration; and

transmit an on-demand system information acquisition report based at least in part on the information associated with the on-demand system information measurement.
An apparatus for wireless communications, comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify a trigger for performing a random access procedure;

perform a successful random access procedure based at least in part on the trigger; and

receive a random access report based at least in part on the successful random access procedure, wherein the random access report comprises logged information associated with the random access procedure.
An apparatus for wireless communications, comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify a trigger for performing a random access procedure;

perform an unsuccessful random access procedure based at least in part on the trigger; and

receive a random access failure report based at least in part on the unsuccessful random access procedure.
An apparatus for wireless communications, comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit a logged measurement configuration; and

receive an on-demand system information acquisition report, wherein the on-demand system information report comprises logged information associated with an on-demand system information measurement that is based at least in part on the logged measurement configuration.
An apparatus for wireless communications, comprising:

means for identifying a trigger for performing a random access procedure;

means for performing a successful random access procedure based at least in part on the trigger; and

means for logging information associated with the successful random access procedure.
An apparatus for wireless communications, comprising:

means for identifying a trigger for performing a random access procedure;

means for performing an unsuccessful random access procedure based at least in part on the trigger; and

means for transmitting a random access failure report based at least in part on the unsuccessful random access procedure.
An apparatus for wireless communications, comprising:

means for receiving a logged measurement configuration;

means for logging information associated with an on-demand system information measurement based at least in part on the logged measurement configuration; and

means for transmitting an on-demand system information acquisition report based at least in part on the information associated with the on-demand system information measurement.
An apparatus for wireless communications, comprising:

means for identifying a trigger for performing a random access procedure;

means for performing a successful random access procedure based at least in part on the trigger; and

means for receiving a random access report based at least in part on the successful random access procedure, wherein the random access report comprises logged information associated with the random access procedure.
An apparatus for wireless communications, comprising:

means for identifying a trigger for performing a random access procedure;

means for performing an unsuccessful random access procedure based at least in part on the trigger; and

means for receiving a random access failure report based at least in part on the unsuccessful random access procedure.
An apparatus for wireless communications, comprising:

means for transmitting a logged measurement configuration; and

means for receiving an on-demand system information acquisition report, wherein the on-demand system information report comprises logged information associated with an on-demand system information measurement that is based at least in part on the logged measurement configuration.
A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE) , the code comprising instructions executable by a processor to:

identify a trigger for performing a random access procedure;

perform a successful random access procedure based at least in part on the trigger; and

log information associated with the successful random access procedure.
A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE) , the code comprising instructions executable by a processor to:

identify a trigger for performing a random access procedure;

perform an unsuccessful random access procedure based at least in part on the trigger; and

transmit a random access failure report based at least in part on the unsuccessful random access procedure.
A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE) , the code comprising instructions executable by a processor to:

receive a logged measurement configuration;

log information associated with an on-demand system information measurement based at least in part on the logged measurement configuration; and

transmit an on-demand system information acquisition report based at least in part on the information associated with the on-demand system information measurement.
A non-transitory computer-readable medium storing code for wireless communications at a network entity, the code comprising instructions executable by a processor to:

identify a trigger for performing a random access procedure;

perform a successful random access procedure based at least in part on the trigger; and

receive a random access report based at least in part on the successful random access procedure, wherein the random access report comprises logged information associated with the random access procedure.
A non-transitory computer-readable medium storing code for wireless communications at a network entity, the code comprising instructions executable by a processor to:

identify a trigger for performing a random access procedure;

perform an unsuccessful random access procedure based at least in part on the trigger; and

receive a random access failure report based at least in part on the unsuccessful random access procedure.
A non-transitory computer-readable medium storing code for wireless communications at a network entity, the code comprising instructions executable by a processor to:

transmit a logged measurement configuration; and

receive an on-demand system information acquisition report, wherein the on-demand system information report comprises logged information associated with an on-demand system information measurement that is based at least in part on the logged measurement configuration.