Technology for cell prohibition time selection

Abstract

Methods, systems, and devices are described. User equipment (UE) can be configured to initiate a first establishment procedure with a first cell supported by a base station. The UE can determine, based on initiating the first establishment procedure, a System Information Block (SIB) read failure, a Radio Link Failure (RLF), or both. The UE can determine whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The UE can select a cell blocking time based on the type of communication service established via the base station, whether the link quality metric meets the link quality threshold, or both. The UE can subsequently initiate a cell reselection procedure based on the cell blocking time.

Description

[0001] Cross-referencing

[0002] This patent application claims the benefit of Indian Provisional Patent Application No. 202041038125 entitled “TECHNIQUES FOR CELLBAR TIME SELECTION”, filed by Vyas et al. on September 3, 2020, which has been assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following relates to wireless communications, including technologies for cell prohibition time selection.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can support communication with multiple users by sharing 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-A Advanced (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems, which may be referred to as NR systems. These systems can employ various 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 Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication from multiple communication devices, which may also be referred to as User Equipment (UE).

[0006] In some wireless communication systems, a UE can "block" cells with poor signal conditions from a list of available cells to prevent the UE from continuing to attach to problematic cells. For example, the UE can block problematic cells for a predefined duration (e.g., 30 seconds, 300 seconds) to prevent the UE from attempting to attach to problematic cells and to allow the UE to scan for and attach to other cells. However, communication interruption may occur if the UE blocks problematic cells for the predefined duration but is unable to attach to new cells.

[0007] Overview

[0008] The described technology relates to improved methods, systems, devices, and apparatuses for supporting techniques for selecting cell prohibition times. In some aspects, a user equipment (UE) can be configured to have multiple cell prohibition times and can be configured to select a shorter cell prohibition time when certain conditions are met. Conditions that the UE can consider when selecting a cell prohibition time may include whether the ongoing communication service includes performance-critical communication services (e.g., Voice over LTE (VoLTE) calls, Voice over New Radio (VoNR) calls, gaming services), whether the link quality threshold associated with the serving cell meets one or more link quality thresholds, or both. For example, the UE can establish a communication service in a connected operation mode with a first cell supported by a base station. In some cases, the first cell may be associated with a default cell prohibition time. The UE can determine that the System Information Block (SIB) read associated with the first cell has failed, or that a Radio Link Failure (RLF) has occurred, or both. The UE may additionally determine one or more parameters associated with the communication service performed at the UE, one or more link quality parameters associated with the first cell (e.g., Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Signal-to-Noise Ratio (SNR), Signal-to-Interference-plus-Noise Ratio (SINR)), or both. In this example, if one or more parameters indicate that the communication service includes a performance-critical communication service and / or if one or more link quality parameters indicate that the cell's link quality is less than (e.g., worse than) a threshold link quality (e.g., RSRP) Cell ≤Thresh RSRP If the UE can select a cell blocking time (e.g., a shorter cell blocking time than the default cell blocking time), then the UE can choose a cell blocking time. By utilizing a shorter cell blocking time, the techniques described herein enable the UE to scan for new cells and, under certain conditions, to retry communication with blocked cells after a shorter duration. This can reduce UE downtime and prevent failures of performance-critical communication services.

[0009] A method for wireless communication at a UE is described. The method may include: initiating a first setup procedure with a first cell supported by a base station; determining an SIB read failure, an RLF, or both based on initiating the first setup procedure; identifying the type of communication service established via the base station; determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold; selecting a cell blocking time based on the type of communication service, whether the link quality metric meets the link quality threshold, or both; and initiating a cell reselection procedure based on the cell blocking time.

[0010] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. These instructions may be executed by the processor to cause the apparatus to: initiate a first establishment procedure with a first cell supported by a base station; determine an SIB read failure, an RLF, or both based on initiating the first establishment procedure; identify the type of communication service established via the base station; determine whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold; select a cell blocking time based on the type of communication service, whether the link quality metric meets the link quality threshold, or both; and initiate a cell reselection procedure based on the cell blocking time.

[0011] Another apparatus for wireless communication at a UE is described. The apparatus may include means for initiating a first setup procedure with a first cell supported by a base station; means for determining an SIB read failure, RLF, or both based on initiating the first setup procedure; means for identifying the type of communication service established via the base station; means for determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold; means for selecting a cell blocking time based on the type of communication service, whether the link quality metric meets the link quality threshold, or both; and means for initiating a cell reselection procedure based on the cell blocking time.

[0012] A non-transient computer-readable medium is described, storing code for wireless communication at a UE. The code may include instructions executable by a processor to: initiate a first setup procedure with a first cell supported by a base station; determine an SIB read failure, RLF, or both based on initiating the first setup procedure; identify the type of communication service established via the base station; determine whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold; select a cell blocking time based on the type of communication service, whether the link quality metric meets the link quality threshold, or both; and initiate a cell reselection procedure based on the cell blocking time.

[0013] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, initiating a cell selection procedure based on a cell prohibition time may include operations, features, means, or instructions for: adding a first cell to a list of prohibited cells based on the selected cell prohibition time, and scanning for cells different from the first cell based on the addition of the first cell to the list of prohibited cells.

[0014] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: determining the expiration of a cell prohibition period, removing a first cell from a list of prohibited cells based on the determination of the expiration of the cell prohibition period, and initiating a second establishment procedure with the first cell based on the removal of the first cell from the list of prohibited cells.

[0015] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, devices, or instructions for determining whether the type of communication service is likely one of a predefined set of performance-critical communication services.

[0016] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, devices or instructions for actions such as selecting a cell blocking time, which may be based on determining the type of communication service, possibly one of a predefined set of performance-critical communication services.

[0017] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, the predefined set of communication services includes VoLTE calls, VoNR calls, gaming communication services, or any combination thereof.

[0018] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: selecting a second cell prohibition time different from the cell prohibition time if the link quality metric fails to meet the link quality threshold; and selecting the cell prohibition time if the link quality metric meets the link quality threshold.

[0019] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, the cell injunction time may be shorter than the second cell injunction time.

[0020] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: determining a set of cell prohibition times, determining that a link quality metric meets a link quality threshold, determining that a link quality metric fails to meet a second link quality threshold different from the link quality threshold, and selecting cell prohibition times from the set of cell prohibition times based on determining that the link quality metric meets the link quality threshold and fails to meet the second link quality threshold.

[0021] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for determining an RSRP metric, an RSRQ metric, an SNR metric, an SINR metric, or any combination thereof associated with a first cell, wherein the link quality metric includes RSRP, RSRQ, SNR, SINR, or any combination thereof.

[0022] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means, or instructions for: determining a bearer type associated with a communication service, a latency metric associated with a communication service, a quality of service (QoS) metric associated with a communication service, a reliability metric associated with a communication service, or any combination thereof, wherein determining the type of communication service may be based on the determined bearer type, the determined latency metric, the determined QoS metric, the determined reliability metric, or any combination thereof.

[0023] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for receiving an indication of the type of communication service from a higher layer of the UE, wherein determining the type of communication service may be based on receiving the indication from a higher layer of the UE.

[0024] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for establishing a communication service in a connected operation mode prior to initiating a first establishment procedure, wherein determining that an SIB read failure, RLF, or both may be based on establishing a communication service in the connected operation mode. Brief description of the attached diagram

[0026] Figure 1 Examples of wireless communication systems that support techniques for cell time-selection based on various aspects of this disclosure are explained.

[0027] Figure 2 Examples of wireless communication systems that support techniques for cell time-selection based on various aspects of this disclosure are explained.

[0028] Figure 3 An example of the process flow for supporting technologies for cell prohibition time selection based on various aspects of this disclosure is explained.

[0029] Figure 4 and 5A diagram of an apparatus supporting a technology for cell prohibition time selection according to various aspects of this disclosure is shown.

[0030] Figure 6 A diagram is shown illustrating a communication manager that supports technologies for cell prohibition time selection according to various aspects of this disclosure.

[0031] Figure 7 A diagram of a system including a device supporting technology for cell prohibition time selection is shown according to various aspects of this disclosure.

[0032] Figures 8 to 10 A flowchart illustrating a method for using techniques for cell prohibition time selection according to various aspects of this disclosure is shown.

[0033] Detailed description

[0034] In some wireless communication systems, a user equipment (UE) can "block" cells from a list of available cells that are in poor signal condition to prevent the UE from continuing to attach to problematic cells. For example, in cases where the UE experiences a mandatory System Information Block (SIB) read failure, a Radio Link Failure (RLF), or both, the UE can block a cell for a predefined duration (e.g., add the cell to a blocked / banned cell list) to prevent the UE from attempting to attach to the problematic cell within the predefined duration and to allow the UE to scan for and attach to other cells during the predefined duration. In some wireless communications, the UE and / or the cell can be associated with a predefined static cell blocking time. For example, the cell blocking time could be 30 seconds, 300 seconds, or another duration. However, in situations where a UE blocks a problematic cell for a predefined duration (e.g., 30 seconds, 300 seconds) but is unable to attach to a new cell within that predefined duration, the UE may lose service and may drop ongoing performance-critical communication operations (such as LTE Voice (VoLTE) calls, New Voice over Radio (VoNR) calls, gaming operations, or any combination thereof) or cause them to fail. For example, if a UE blocks a serving cell for 30 seconds while making a VoNR call but cannot find a new cell, the VoNR call may be dropped. Accordingly, the cell blocking time used in some wireless communication systems can lead to service loss, failure of performance-critical operations, and overall impairment of consumer experience and satisfaction.

[0035] To improve wireless communication in the context of cell selection, a technique for selecting cell prohibition times is disclosed. Specifically, a UE can be configured to have multiple cell prohibition times and can be configured to select a shorter cell prohibition time when certain conditions are met. Conditions that the UE may consider when selecting a cell prohibition time may include whether the ongoing communication service includes performance-critical communication services (e.g., VoLTE calls, VoNR calls, gaming services), whether the link quality threshold associated with the serving cell is met (e.g., several link quality thresholds), or both.

[0036] For example, a UE can establish a communication service in a connected operation mode with a cell supported by a base station. In some cases, the first cell may be associated with a default cell blackout period. The UE can determine an SIB read failure, RLF, or both associated with the first cell. Additionally, the UE can determine a set of parameters associated with the communication service performed at the UE, a set of link quality parameters associated with the first cell (e.g., Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Signal-to-Noise Ratio (SNR), Signal-to-Interference Plus Noise Ratio (SINR)), or both. In this example, if the parameter set indicates that the communication service includes a performance-critical communication service and / or if the link quality parameter set indicates that the cell's link quality is less than (e.g., worse than) a threshold link quality (e.g., RSRP)... Cell ≤Thresh RSRP If the UE can select a cell blocking time (e.g., a shorter cell blocking time than the default cell blocking time), then the UE can choose a cell blocking time. By utilizing a shorter cell blocking time, the technique described herein enables the UE to scan for new cells and allows the UE to retry communication with blocked cells after a shorter duration in certain scenarios. This can reduce UE downtime and prevent failures of performance-critical communication services.

[0037] The aspects of this disclosure are initially described in the context of wireless communication systems. Additional aspects of this disclosure are described in the context of example processing flows. The aspects of this disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts relating to techniques for cell blackout timing selection.

[0038] Figure 1Examples of a wireless communication system 100 supporting techniques for cell time-disabled selection according to various aspects of this disclosure are described. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0039] Base station 105 can be distributed across a geographical area to form wireless communication system 100, and can be different types of devices or devices with different capabilities. Base station 105 and UE 115 can communicate wirelessly via one or more communication links 125. Each base station 105 can provide a coverage area 110, and UE 115 and base station 105 can establish one or more communication links 125 on the coverage area 110. Coverage area 110 can be an example of a geographical area over which base station 105 and UE 115 can support signal communication according to one or more radio access technologies.

[0040] Each UE 115 can be distributed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary and mobile at different times. Each UE 115 can be a different type of device or a device with different capabilities. Figure 1 The document describes some example UE 115s. The UE 115 described herein can communicate with various types of devices, such as other UE 115s, base station 105, or network equipment (e.g., core network nodes, relay equipment, integrated access and backhaul (IAB) nodes, or other network equipment). Figure 1 As shown in the image.

[0041] Each base station 105 may communicate with the core network 130, or with each other, or both. For example, base station 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base stations 105 may communicate with each other directly (e.g., directly between base stations 105), indirectly (e.g., via the core network 130), or directly and indirectly on backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, backhaul link 120 may be or include one or more radio links.

[0042] One or more of the base stations 105 described herein may include, or may be referred to by those skilled in the art as, base transceiver station, radio base station, access point, radio transceiver, B node, evolved B node (eNB), next-generation B node or gigabit B node (any of which may be referred to as gNB), home B node, home evolved B node, or other suitable terms.

[0043] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other suitable term, wherein the device may also be referred to as a cell, station, terminal, or client, etc. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, which can be implemented in various objects such as appliances or vehicles, instruments, etc.

[0044] The UE 115 described herein can communicate with various types of devices, such as other UEs 115 that sometimes act as relays, as well as base station 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 As shown in the image.

[0045] UE 115 and base station 105 can wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" can refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the radio spectrum band (e.g., a bandwidth portion (BWP)) operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling coordinating carrier operation, user data, or other signaling. Wireless communication system 100 may support communication with UE 115 using carrier aggregation or multi-carrier operation. UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0046] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a 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, the code rate of the modulation scheme, or both). Thus, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate the UE 115 can achieve. Wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and using multiple spatial layers can further improve the data rate or data integrity of communication with the UE 115.

[0047] The time interval of base station 105 or UE 115 can be expressed as a multiple of a basic time unit, such as the sampling period T. s =1 / (Δf) max ·Nf) seconds, where Δf max The maximum supported subcarrier spacing can be represented by Nf, while Nf can represent the maximum supported Discrete Fourier Transform (DFT) size. The time interval of the communication resources can be organized according to radio frames, each with a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0048] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may (e.g., in the time domain) be divided into subframes, and each subframe may be further divided into several time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include several symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple mini-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0049] A subframe, time slot, mini-slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0050] Physical channels can be multiplexed on a carrier using various techniques. Physical control channels and physical data channels can be multiplexed on a downlink carrier, for example, using one or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for physical control channels can be defined by the number of symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESET) can be configured for a set of UEs 115. For example, one or more UEs 115 can monitor or search control regions for control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for control channel candidates can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information in a control information format having a given payload size. The search space set may include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set configured to send control information to a specific UE 115.

[0051] Each base station 105 may provide communication coverage via one or more cells (e.g., macrocells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with base station 105 (e.g., on a carrier) and may be associated with an identifier used to distinguish adjacent cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area 110 or a portion of geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. The extent of such cells may vary from smaller areas (e.g., structures, subsets of structures) to larger areas depending on various factors (such as the capabilities of base station 105). For example, a cell may be or include buildings, subsets of buildings, or external space between or overlapping geographic coverage areas 110, among other examples.

[0052] Macrocells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access for UEs 115 that have service subscriptions with a network provider supporting the macrocell. Small cells may be associated with a lower-power base station 105 (compared to macrocells) and may operate in the same or different (e.g., licensed or unlicensed) frequency bands as macrocells. Small cells may provide unrestricted access to UEs 115 that have service subscriptions with a network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a Closed Subscriber Group (CSG), or UEs 115 associated with a user in a home or office). Base station 105 may support one or more cells and may also support communication on one or more cells using one or more component carriers.

[0053] In some examples, a carrier can support multiple cells and can be configured with different cells based on different protocol types that can provide access for different types of devices (e.g., MTC, Narrowband IoT (NB-IoT), Enhanced Mobile Broadband (eMBB)).

[0054] In some examples, base station 105 may be mobile, and thus provide communication coverage to mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may include, for example, a heterogeneous network, in which different types of base stations 105 use the same or different radio access technologies to provide coverage to various geographic coverage areas 110.

[0055] Wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication, or various combinations thereof. For example, wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency, or mission-critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private or group communication and may be supported by one or more mission-critical services, such as Mission-Critical Talk-to-Talk (MCPTT), Mission-Critical Video (MCVideo), or Mission-Critical Data (MCData)). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general business applications. The terms ultra-reliable, low latency, mission-critical, and ultra-reliable low latency are used interchangeably herein.

[0056] In some examples, UE 115 may also be able to communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UE 115s utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105 or may be unable to receive transmissions from base station 105 for other reasons. In some examples, groups of UE 115s communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between the individual UE 115s without involving base station 105.

[0057] Core network 130 provides user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 can be an evolved packet core (EPC) or a 5G core (5GC). The EPC or 5GC may include at least one control plane entity (e.g., a Mobility Management Entity (MME), Access and Mobility Management Function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a Serving Gateway (S-GW), Packet Data Network (PDN) Gateway (P-GW), or User Plane Function (UPF)) for routing packets or interconnecting to external networks. The control plane entity manages non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by base station 105 associated with core network 130. User IP packets can be delivered through the user plane entity, which provides IP address allocation and other functions. The user plane entity can connect to network operator IP service 150. Carrier IP services 150 may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0058] Some network devices (such as base station 105) may include sub-components, such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as a radio headend, smart radio headend, or transmit / receive point (TRP). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio headends and ANCs) or combined into a single network device (e.g., base station 105).

[0059] Wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz. Generally, the 300 MHz to 3 GHz band is referred to as a UHF band or decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can penetrate various structures sufficiently for macrocells to provide service to UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the lower HF or VHF portions of the spectrum below 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0060] Wireless communication system 100 may utilize both licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band). When operating in unlicensed radio spectrum bands, devices (such as base station 105 and UE 115) may employ carrier sensing for collision detection and avoidance. In some examples, operation in unlicensed frequency bands may be based on carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in licensed frequency bands. Operation in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0061] Base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may coexist at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have an antenna array with several rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0062] Base station 105 or UE 115 can use MIMO communication to leverage multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. This technique is known as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals 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 (e.g., different codewords). 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 multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0063] Beamforming (also known as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or guide an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array, such that some signals propagating relative to a particular orientation of the antenna array experience constructive interference, while others experience destructive interference. Adjustments to the signals transmitted via the antenna elements may include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element may be defined by a beamforming weight set associated with a particular orientation (e.g., the antenna array relative to the transmitting or receiving device, or relative to some other orientation).

[0064] Base station 105 or UE 115 may use beamsweeping techniques as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions. For example, base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by the transmitting device (such as base station 105) or the receiving device (such as UE 115)) to identify the beam direction that base station 105 will use for later transmission or reception.

[0065] Some signals (such as data signals associated with a specific receiving device) may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device (such as UE 115)). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on the signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signals received by UE 115 with the highest signal quality or other acceptable signal quality.

[0066] In some examples, transmissions performed by a device (e.g., by base station 105 or UE 115) may be executed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate combined beams for transmission (e.g., from base station 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and this feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals that may be precoded or unprecoded (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)). UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify the beam direction used by UE 115 for subsequent transmission or reception) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0067] A receiver device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiver device may attempt multiple receive directions by: receiving via different antenna subarrays; processing received signals according to different antenna subarrays; receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets); or processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as "listening" according to different receive configurations or receive directions. In some examples, the receiver device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0068] Wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer performs packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer performs priority handling and multiplexing of logical channels into transport channels. The MAC layer can also use error detection, error correction, or both to support MAC layer retransmissions to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of RRC connections between UE 115 and base station 105 or core network 130 supporting user plane data radio bearers. At the physical layer, transport channels can be mapped to physical channels.

[0069] UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Repeat Request (HARQ) feedback is a technique used to increase the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve MAC layer throughput in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device may support simultaneous time-slot HARQ feedback, where the device can provide HARQ feedback in a specific time slot for data received in previous symbols within that time slot. In other cases, the device may provide HARQ feedback in subsequent time slots or according to some other time interval.

[0070] In some aspects, the UE 115 and base station 105 of the wireless communication system 100 may support techniques for selecting cell prohibition times. Specifically, the UE 115 of the wireless communication system 100 may be configured to have multiple cell prohibition times and may be configured to select a shorter cell prohibition time when certain conditions are met. Conditions that the UE 115 may consider when selecting a cell prohibition time may include whether the ongoing communication service includes performance-critical communication services (e.g., VoLTE calls, VoNR calls, gaming services), whether the link quality threshold associated with the serving cell is met, or both. By adaptively selecting a cell prohibition time (e.g., a shorter cell prohibition time), the techniques described herein enable the UE 115 of the wireless communication system to re-establish wireless communication with the cell supported by the base station 105 of the wireless communication system 100 after a shorter duration, and to reduce the time of no service for the UE 115-a, thereby preventing the failure of performance-critical communication services.

[0071] For example, UE 115 of wireless communication system 100 can establish a communication service in a connected operation mode with a cell supported by base station 105 of wireless communication system 200. In some cases, the first cell may be associated with a default cell blocking time. In this example, UE 115 may determine an SIB read failure, RLF, or both associated with the first cell. Additionally, UE 115 may determine one or more parameters associated with the communication service performed at UE 115 (e.g., whether the communication service includes a performance-critical communication service (such as VoLTE or VoNR)), one or more link quality parameters of the first cell (e.g., RSRP, RSRQ, RSSI, SNR, or SINR), or both. In this example, if one or more parameters indicate that the communication service includes a performance-critical communication service and / or if one or more link quality parameters indicate that the link quality of the cell is less than (e.g., worse than) a threshold link quality (e.g., RSRP). Cell ≤Thresh RSRP If ), then UE 115 can select a cell blocking time (e.g., a cell blocking time shorter than the default cell blocking time).

[0072] The techniques described herein provide improved wireless communication by reducing the duration of service outages for UE 115. Specifically, by selecting a shorter cell blocking time, the techniques described herein enable UE 115 to scan for new cells and, in certain scenarios, to retry communication with blocked cells after a shorter duration. This reduces the service outage time for UE 115 and prevents the failure of performance-critical communication services. By reducing the service outage time for UE 115, the techniques described herein reduce power consumption at UE 115, enabling more timely service recovery and improved user experience.

[0073] Figure 2 Examples of a wireless communication system 200 supporting techniques for cell blackout time selection according to various aspects of this disclosure are described. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. The wireless communication system 200 may include a UE 115-a and a base station 105-a, which may be as described in reference Figure 1 Examples of UE 115 and base station 105 described.

[0074] Wireless communication system 200 can support wireless communication with wireless devices (e.g., UE 115-a) via one or more cells 205 of wireless communication system 200. Specifically, each cell 205 can be supported by one or more base stations 105 of wireless communication system 200. For example, as Figure 2 As shown, the wireless communication system 200 may include a first cellular cell 205-a supported by base station 105-a and a second cellular cell 205-b supported by base station 105-a. The wireless communication system 100 may include any number of cellular cells 205 supported by any number of base stations 105. For example, in an additional or alternative scenario, the first cellular cell 205-a may be supported by base station 105-a, while the second cellular cell 205-b may be supported by a second base station 105 (not shown) that is different from base station 105-a.

[0075] In some aspects, UE 115-a may communicate with base station 105-a using one or more beams, one or more communication links, or both. For example, each cell 205 may be associated with a different frequency range, a separate beam, and / or a separate communication link to facilitate wireless communication between UE 115-a and the corresponding cell 205. In some cases, the communication link may include examples of an access link (e.g., a Uu link). The communication link may include a bidirectional link that may contain both uplink and downlink communication. For example, UE 115-a may use the communication link to transmit uplink transmissions 220 (such as uplink control signals or uplink data signals) to base station 105-a, and base station 105-a may use the communication link to transmit downlink transmissions (such as downlink control signals or downlink data signals) to UE 115-a.

[0076] In some aspects, the UE 115-a and base station 105-a of the wireless communication system 200 can support techniques for selecting cell prohibition times. Specifically, the UE 115-a of the wireless communication system 200 can be configured to have multiple cell prohibition times and can be configured to select a shorter cell prohibition time when certain conditions are met. Conditions that the UE 115-a can consider when selecting a cell prohibition time may include whether the ongoing communication service includes performance-critical communication services (e.g., VoLTE calls, VoNR calls, gaming services), whether the link quality threshold associated with the serving cell is met, or both. By adaptively selecting the cell prohibition time (e.g., a shorter cell prohibition time), the techniques described herein enable the UE 115-a of the wireless communication system to re-establish wireless communication with the cell 205 supported by the base station 105 of the wireless communication system 200 after a shorter duration, and to reduce the time the UE 115-a is without service, thereby preventing the failure of performance-critical communication services.

[0077] For example, in some situations, UE 115-a may establish a communication service while operating in a connected operation mode. In some aspects, UE 115-a may establish a communication service with a first cell 205-a supported by base station 105-a. The communication service may include any communication service known in the art, including but not limited to VoLTE calls, VoNR calls, gaming communication services, web browsing communication services, or any combination thereof. In some aspects, UE 115-a may initiate or otherwise execute a first establishment procedure with the first cell 205-a supported by base station 105-a. For example, the first UE 115-a may initiate an attachment procedure with the first cell 205-a. In some aspects, UE 115-a may initiate the first establishment procedure after establishing a communication service.

[0078] In some respects, the first cell 205-a may be associated with a default cell blocking time, or the UE 115-a may be configured to have a default cell blocking time. The default cell blocking time may be defined as the duration during which the UE 115 adds the first cell 205 to the list of blocked cells (and / or removes the first cell 205 from the list of available cells 205) in the event of a failure associated with the first cell 205-a, or if the first cell 205-a is otherwise found to be problematic. In some cases, the default cell blocking time may include 30 seconds, 300 seconds, or another duration.

[0079] In some scenarios, UE 115-a may determine an SIB read failure, RLF, or both associated with the first cell 205-a. In some aspects, UE 115-a may determine an SIB read failure and / or RLF based on establishing a communication service in connected operation mode, performing (e.g., initiating) a first setup procedure with the first cell 205-a, or both. For example, UE 115-a may determine (e.g., observe) a mandatory SIB read failure while a timer (e.g., timer T311) is running. That is, UE 115-a may start a timer (e.g., timer T311) during setup or connection re-establishment procedures, and a mandatory SIB read failure or RLF may occur before the setup or re-establishment procedure is completed. As another example, UE 115-a may identify a poor wireless communication condition that results in repeated RLFs when operating in connected operation mode.

[0080] In some respects, UE 115-a can identify / determine the type of communication service established. Specifically, UE 115-a can determine the type of communication service based on determining an SIB read failure, RLF, or both associated with the first cell 205-a. In some cases, UE 115-a can determine whether the type of communication service is one of a predefined set of performance-critical communication services. This predefined set of performance-critical communication services may include, but is not limited to, VoLTE calls, VoNR calls, gaming communication services, or any combination thereof. In this respect, UE 115-a can determine whether the communication service includes VoLTE calls, VoNR calls, gaming communication services, or any combination thereof.

[0081] In some respects, UE 115-a may determine the type of communication service based on one or more parameters or characteristics associated with the communication service. Parameters or characteristics associated with the communication service that can be used to determine the type of communication service may include, but are not limited to, the bearer(s) associated with the communication service, attributes associated with the bearer(s) associated with the communication service, the number of bearers associated with the communication service, latency metrics associated with the communication service, quality of service (QoS) metrics associated with the communication service, reliability metrics associated with the communication service, or any combination thereof.

[0082] For example, the bearer and / or bearer type associated with a communication service may indicate that the communication service includes performance-critical communication services. As another example, lower latency metrics, higher QoS metrics, and / or higher reliability metrics may indicate performance-critical communication services compared to higher latency metrics, lower QoS metrics, and / or lower reliability metrics.

[0083] In additional or alternative aspects, UE 115-a may determine the type of communication service based on signaling from higher layers of UE 115-a. For example, components of UE 115-a (e.g., modem, processor) may receive indications of the type of communication service from higher layers of UE 115-a (e.g., MAC layer, application layer). In this aspect, higher-layer signaling may indicate whether the communication service includes performance-critical communication services. Similarly, UE 115-a may determine the type of communication service based on signaling from an application or program that can be executed by UE 115-a. For example, UE 115-a may establish a game communication service by executing a game application (“app”) of UE 115-a. In this example, the game application may indicate to components of UE 115-a (e.g., modem, processor) that the game communication service includes performance-critical communication services.

[0084] In some aspects, UE 115-a may determine one or more link quality metrics associated with communication between UE 115-a and the first cell 205-a. For example, UE 115-a may perform a set of measurements on signals received from the first cell 205-a (e.g., signals received from base station 105-a supporting the first cell 205-b), and may determine one or more link quality metrics based on this set of measurements. Link quality metrics may include, but are not limited to, RSRP metrics, RSRQ metrics, SNR metrics, SINR metrics, or any combination thereof. In some aspects, UE 115-a may determine one or more link quality metrics based on establishing a communication service, initiating / executing a first setup procedure with the first cell 205-a, determining an SIB read failure and / or RLF associated with the first cell 205-a, determining the type of communication service, or any combination thereof.

[0085] When determining one or more link quality metrics associated with communication between UE 115-a and the first cell 205-a, UE 115-a may determine whether the one or more link quality metrics meet one or more link quality thresholds. The one or more link quality thresholds may include, but are not limited to, RSRP thresholds, RSRQ thresholds, SNR thresholds, SINR thresholds, Frequency Tracking Loop (FTL) error thresholds, Time Tracking Loop (TTL) error thresholds, or any combination thereof. In some cases, one or more link quality thresholds may be indicated to UE 115-a via control signaling (e.g., RRC signaling) from base station 105-a. Additionally or alternatively, UE 115-a may be pre-configured to have link quality thresholds, selectively adjust the determined link quality thresholds based on network conditions, or both.

[0086] In some respects, UE 115-a may perform a comparison between link quality metrics and link quality thresholds based on establishing a communication service, initiating / executing a first setup procedure with the first cell 205-a, determining an SIB read failure and / or RLF associated with the first cell 205-a, determining the type of communication service, or any combination thereof.

[0087] In some respects, if a link quality metric indicates that the link quality associated with the first cell 205-a is less than (e.g., worse than) a corresponding link quality threshold, then UE 115-a can determine that the corresponding link quality metric “satisfies” the corresponding link quality threshold. For example, in the case of RSRP, RSRQ, SNR, or SINR metrics, if the metric is less than or equal to the corresponding threshold, then UE 115-a can determine that the metric satisfies the corresponding threshold (e.g., if RSRP...). Cell ≤Thresh RSRP ,RSRQCell ≤Thresh RSRQ SNR Cell ≤Thresh SNR or SINR Cell ≤Thresh SINR If the link quality metric indicates that the link quality associated with the first cell 205-c is greater than, or greater than or equal to, the corresponding link quality threshold, then UE 115-b may determine that the corresponding link quality metric “satisfies” the corresponding link quality threshold. For example, in the case of error metrics, if the error metric is greater than or equal to the corresponding threshold, then UE 115-b may determine that the error metric satisfies the corresponding threshold (e.g., if Error...). FTL ≥Thresh FTL Or Error TTL ≥Thresh TTL Then the error threshold is satisfied.

[0088] In some respects, UE 115-a may select a cellular blocking time. Specifically, UE 115-a may select a cellular blocking time based on the determined type of communication service (e.g., whether the communication service includes performance-critical communication services), whether a link quality metric meets one or more link quality thresholds, or both. Additionally or alternatively, UE 115-a may select a cellular blocking time based on establishing a communication service, initiating / executing a first setup procedure with the first cell 205-a, determining an SIB read failure and / or RLF associated with the first cell 205-a, or any combination thereof.

[0089] In some aspects, UE 115-a may select a cell prohibition time from a set of cell prohibition times configured at UE 115-a and / or from a set of cell prohibition times associated with the first cell 205-a. For example, UE 115-a may be configured to have a default cell prohibition time associated with the first cell 205-a and one or more additional cell prohibition times (e.g., one or more shortened cell prohibition times). In some aspects, the default cell prohibition time may include 30 seconds, 300 seconds, or some other duration. In contrast, one or more additional / shortened cell prohibition times may include 3 seconds, 7 seconds, or some other duration shorter than the default cell prohibition time.

[0090] In some scenarios, UE 115-a may base its functionality on communication services, including performance-critical communication services (e.g., VoLTE calls, VoNR calls, gaming communication services), or on meeting one or more link quality thresholds based on one or more link quality metrics (e.g., determining RSRP). Cell≤Thresh RSRP ,RSRQ Cell ≤Thresh RSRQ SNR Cell ≤Thresh SNR SINR Cell ≤Thresh SINR Error FTL ≥Thresh FTL , or Error TTL ≥Thresh TTL UE 115-a may select a cell blocking time different from the default cell blocking time, or both. In additional or alternative scenarios, if the communication service includes performance-critical communication services, UE 115-a may select a cell blocking time different from the default cell blocking time (e.g., a shortened cell blocking time) even if the link quality thresholds(s) are not met. Conversely, in other scenarios, if the link quality thresholds(s) are met, UE 115-a may select a cell blocking time different from the default cell blocking time (e.g., a shortened cell blocking time) even if the communication service does not include performance-critical communication services.

[0091] For example, UE 115-a may determine that the communication service does not include performance-critical communication services. In such cases, if the link quality metrics(s) meet the link quality threshold(s), UE 115-a may select a cell blackout period (e.g., a shortened cell blackout period) (e.g., if RSRP...). Cell ≤Thresh RSRP ,RSRQ Cell ≤Thresh RSRQ If the link quality metrics fail to meet the link quality thresholds, then UE115-a may select a second cell prohibition time (e.g., the default cell prohibition time) (e.g., if RSRP...). Cell Thresh RSRP ,RSRQ Cell Thresh RSRQQ If the link quality metrics fail to meet the link quality thresholds, UE 115-a may choose a shortened cell blocking time if the communication service includes performance-critical communication services, and UE 115-a may choose a default cell blocking time if the communication service does not include performance-critical communication services.

[0092] In some scenarios, UE 115-a can compare link quality metrics with multiple link quality thresholds and can select a cell prohibition time based on which link quality thresholds are met and / or the number of times the link quality thresholds are met. For example, UE 115-a can be configured to have a first shortened cell prohibition time (e.g., a 7-second cell prohibition time) and a second shortened cell prohibition time (e.g., a 3-second cell prohibition time). In this example, UE 115-a can select a cell prohibition time from the first shortened cell prohibition time and the second shortened cell prohibition time depending on which link quality thresholds are met. For example, if the link quality metric meets the first link quality threshold but fails to meet the second link quality threshold, UE 115-a can select the first shortened cell prohibition time (e.g., if RSRP is met). Cell ≤Thresh RSRP 1, but RSRP Cell Thresh RSRP 2. If the link quality metric meets both the first and second link quality thresholds, then UE 115-a can select the second shortened cell prohibition time (e.g., if RSRP...). Cell ≤Thresh RSRP 1 and RSRP Cell ≤Thresh RSRP 2. If the communication service includes performance-critical communication services, UE 115-a may select a first shortened cell prohibition time, while if the link quality metric meets one or more link quality thresholds, UE 115 may select a second shortened cell prohibition time.

[0093] In some aspects, UE 115-a may add first cell 205-a to the list of prohibited cells 205 (and / or remove first cell 205-a from the list of available cells 205). In some aspects, UE 115-a may add first cell 205-a to the list of prohibited cells 205 based on a selected cell prohibition time. Specifically, UE 115-a may add first cell 205-a to the list of prohibited cells 205 for a duration up to the selected cell prohibition time. In this aspect, UE 115-a may add first cell 205-c to the list of prohibited cells for a longer duration (e.g., 30 seconds, 300 seconds) when UE 115-a selects a default cell prohibition time, and may add first cell 205-c to the list of prohibited cells for a shorter duration (e.g., 3 seconds, 7 seconds, 10 seconds) when UE 115-b selects a shortened cell prohibition time.

[0094] In some scenarios, UE 115-a may initiate a cell reselection procedure. By initiating a cell reselection procedure, UE 115-a may scan other cells 205 and attempt to attach (e.g., camp) on a cell 205 not included in the list of prohibited cells 205. In this regard, UE 115-a may initiate a cell reselection procedure based on selecting a cell prohibition time, adding the first cell 205-a to the list of prohibited cells 205, or both. Additionally or alternatively, UE 115-a may initiate a cell reselection procedure based on establishing a communication service, initiating / executing a first establishment procedure with the first cell 205-a, determining an SIB read failure and / or RLF associated with the first cell 205-a, determining the type of communication service, determining one or more link quality metrics, comparing the link quality metrics with a link quality threshold, or any combination thereof.

[0095] During the execution of the cell reselection procedure, UE 115-a may scan other cells 205 (e.g., a second cell 205-b). Specifically, UE 115-a may scan cells 205 that are different from the first cell 205-a and are not included in the list of prohibited cells 205. For example, UE 115-a may scan a second cell 205-b that is different from the first cell 205-a. In some aspects, UE 115-a may scan other cells 205 based on selecting a cell prohibition time, adding the first cell 205-a to the list of prohibited cells 205, or both. In some cases, UE 115-a may scan other cells 205 as part of the cell reselection procedure. Accordingly, in some cases, UE 115-a may scan cells 205 that are different from the first cell 205-a during the duration of the selected cell prohibition time. In some cases, UE 115-a may initiate a setup procedure with second cell 205-b based on scanning second cell 205-b, establish a connection with second cell 205-b, or both. Conversely, if UE 115-a cannot attach to / camp on another cell 205 (e.g., second cell 205-b), it may indicate a "No Service" indication to the NAS layer of UE 115-a.

[0096] In some aspects, UE 115-a can determine the expiration of the selected cell prohibition period. In this aspect, UE 115-a can determine the expiration of the selected cell prohibition period based on the duration of the selected cell prohibition period and the time when the selected cell prohibition period was selected and / or initiated. For example, in the case where UE 115-a selects a shortened cell prohibition period of 7 seconds, UE 115-a can determine the expiration of the shortened cell prohibition period 7 seconds after selecting the shortened cell prohibition period, 7 seconds after adding the first cell 205-a to the list of prohibited cells, or both. In some cases, UE 115-a can remove the first cell 205-a from the list of prohibited cells 205 based on determining the expiration of the cell prohibition period. For example, when the cell blocking time expires, UE 115-a can remove the first cell 205-a from the list of blocked cells, so that UE 115-a can try to attach to the first cell 205-a again (e.g., occupy it).

[0097] In some aspects, UE 115-a may perform (e.g., initiate) a second establishment procedure with the first cell 205-a. In some aspects, UE 115-a may initiate a second establishment procedure with the first cell 205-a based on removing the first cell 205-a from the list of prohibited cells 205. In some aspects, UE 115-a may establish (re-establish) a radio connection with the first cell 205-a based on initiating the second establishment procedure with the first cell 205-a. In some cases, by adding the first cell 205-a to the list of prohibited cells for a shorter duration (e.g., for a shortened cell prohibition period), the techniques described herein can enable UE 115-a to attempt to re-establish a connection with the first cell 205-a after a shorter duration in cases where it is unable to establish a connection with another cell 205 during the cell prohibition period, thereby reducing the duration of UE 115-a's no-service experience.

[0098] The techniques described herein provide improved wireless communication by reducing the duration of no-service for UE 115-a. Specifically, by selecting a shorter cell blocking time, the techniques described herein enable UE 115-a to scan for new cells and retry communication with the blocked cell 205 (first cell 205-a) after a short duration. This reduces the no-service time for UE 115-a and prevents the failure of performance-critical communication services. By reducing the no-service time for UE 115-a, the techniques described herein reduce power consumption at UE 115-a, enabling more timely service recovery and improved user experience.

[0099] Figure 3 Examples of process flow 300 supporting techniques for cell blackout time selection according to various aspects of this disclosure are described. In some examples, process flow 300 may be implemented by or by aspects of wireless communication system 100, wireless communication system 200, or both. For example, process flow 300 may describe UE 115-b determining an SIB read failure and / or RLF associated with first cell 205-c, determining the type of communication service and link quality metric, and selecting a cell blackout time based on the type of communication service, link quality metric, or both, as referred to Figures 1 to 2 As described.

[0100] Process flow 300 may include UE 115-b, first cell 205-c and second cell 205-d, each of which may be a reference. Figure 1 and 2Examples of the UE 115 and cell 205 described herein. In some aspects, the first cell 205-c and the second cell 205-d may be compatible with a single base station 105 of a wireless communication system (e.g., Figure 2 The first cell 205-c and the second cell 205-d may be associated with (e.g., supported by) the base station 105-a described herein. Alternatively or alternatively, the first cell 205-c and the second cell 205-d may be associated with (e.g., supported by) different base stations 105.

[0101] In some examples, the operations described in process flow 300 may be performed by hardware (e.g., including circuit systems, processing blocks, logic components, and other components), code executed by a processor (e.g., software or firmware), or any combination thereof. Alternative examples are possible, in which some steps are performed in a different order than described or not at all. In some cases, the steps may include additional features not mentioned below, or further steps may be added.

[0102] At point 305, UE 115-b can establish a communication service. In some aspects, UE 115-b can establish a communication service while operating in a connected operation mode. Furthermore, UE 115-b can establish a communication service at point 305 with a first cell 205-c, a second cell 205-d, or both. The communication service may include any communication service known in the art, including but not limited to VoLTE calls, VoNR calls, gaming communication services, web browsing communication services, or any combination thereof.

[0103] At 310, UE 115-b may initiate or otherwise execute a first setup procedure with the first cell 205-c supported by base station 105. For example, the first UE 115-b may initiate an attachment procedure with the first cell 205-c. In some aspects, UE 115-b may initiate the first setup procedure after establishing communication service at 305. In some aspects, the first cell 205-c may be associated with a default cell blocking time. The default cell blocking time may be defined as the duration during which UE 115 will block the first cell 205-c from the list of available cells in the event of a failure to identify association with the first cell 205-c, or in the event that the first cell 205-c is found to be problematic. In some cases, the default cell blocking time may include 30 seconds, 300 seconds, or another duration.

[0104] At 315, UE 115-b may determine an SIB read failure, RLF, or both associated with the first cell 205-c. In some aspects, UE 115-b may determine the SIB read failure and / or RLF at 315 based on establishing a communication service in connected operation mode at 305, performing (e.g., initiating) a first setup procedure with the first cell 205-c at 310, or both. For example, UE 115-b may determine (e.g., observe) a mandatory SIB read failure while a timer (e.g., timer T311) is running. As another example, UE 115-b may identify a poor wireless communication condition that results in repeated RLFs when operating in connected operation mode.

[0105] At 320, UE 115-b can identify / determine the type of communication service established at 305. In this respect, UE 115-b can identify the type of communication service established with the first cell 205-c supported by base station 105. In some cases, UE 115-b can determine whether the type of communication service is one of a predefined set of performance-critical communication services. This predefined set of performance-critical communication services may include, but is not limited to, VoLTE calls, VoNR calls, gaming communication services, or any combination thereof. In this respect, UE 115-b can determine whether the communication service established at 305 includes VoLTE calls, VoNR calls, gaming communication services, or any combination thereof.

[0106] In some respects, UE 115-b may determine the type of a communication service based on one or more parameters or characteristics associated with the communication service. Parameters or characteristics associated with a communication service that can be used to determine the type of a communication service may include, but are not limited to, the bearer types associated with the communication service, the number of bearers associated with the communication service, latency metrics associated with the communication service, QoS metrics associated with the communication service, reliability metrics associated with the communication service, or any combination thereof. For example, the bearers and / or bearer types associated with the communication service may indicate that the communication service includes performance-critical communication services. As another example, a lower latency metric, a higher QoS metric, and / or a higher reliability metric may indicate a performance-critical communication service compared to a higher latency metric, a lower QoS metric, and / or a lower reliability metric.

[0107] In additional or alternative aspects, UE 115-b may determine the type of communication service based on signaling from higher layers of UE 115-b. For example, components of UE 115-b (e.g., modem, processor) may receive indications of the type of communication service from higher layers of UE 115-b (e.g., MAC layer, application layer). In this aspect, higher-layer signaling may indicate whether the communication service includes performance-critical communication services. Similarly, UE 115-b may determine the type of communication service based on signaling from an application or program executed by UE 115-b. For example, UE 115-b may establish a game communication service by executing a game application (“app”) of UE 115-b. In this example, the game application may indicate to components of UE 115-b (e.g., modem, processor) that the game communication service includes performance-critical communication services.

[0108] At 325, UE 115-b may determine one or more link quality metrics associated with communication between UE 115-b and the first cell 205-c. For example, UE 115-b may perform a set of measurements on signals received from the first cell 205-c (e.g., signals received from base station 105 supporting the first cell 205-c), and may determine one or more link quality metrics based on this set of measurements. Link quality metrics may include, but are not limited to, RSRP metrics, RSRQ metrics, SNR metrics, SINR metrics, or any combination thereof. In some aspects, UE 115-b may determine one or more link quality metrics at 325 based on establishing a communication service at 305, initiating / executing a first setup procedure at 310, determining an SIB read failure and / or RLF at 315, determining the type of communication service at 320, or any combination thereof.

[0109] At 330, UE 115-b may compare one or more link quality metrics associated with communication between UE 115-b and the first cell 205-c to determine whether the one or more link quality metrics meet one or more link quality thresholds. The one or more link quality thresholds may include, but are not limited to, RSRP threshold, RSRQ threshold, SNR threshold, SINR threshold, FTL error, TTL error, or any combination thereof. In some aspects, UE 115-b may perform the comparison at 330 based on establishing a communication service at 305, initiating / executing a first setup procedure at 310, determining an SIB read failure and / or RLF at 315, determining the type of communication service at 320, determining one or more link quality thresholds, or any combination thereof.

[0110] In some respects, if a link quality metric indicates that the link quality associated with the first cell 205-c is less than (e.g., worse than), or less than or equal to a corresponding link quality threshold, then UE 115-b can determine that the corresponding link quality metric “satisfies” the corresponding link quality threshold. For example, in the case of signal measurement (e.g., RSRP, RSRQ, SNR, or SINR) metrics, if the metric is less than or equal to a corresponding threshold, then UE 115-b can determine that the metric satisfies the corresponding threshold (e.g., if RSRP...). Cell ≤Thresh RSRP and / or RSRQ Cell ≤Thresh RSRQ SNR Cell ≤Thresh SNR and / or SINR Cell ≤Thresh SINR If the link quality metric indicates that the link quality associated with the first cell 205-c is greater than, or greater than or equal to, the corresponding link quality threshold, then UE 115-b may determine that the corresponding link quality metric “satisfies” the corresponding link quality threshold. For example, in the case of error metrics, if the error metric is greater than, or greater than or equal to, the corresponding threshold, then UE 115-b may determine that the error metric satisfies the corresponding threshold (e.g., if Error...). FTL ≥Thresh FTL Or Error TTL ≥Thresh TTL Then the error threshold is satisfied.

[0111] At 335, UE 115-b can select a cellular prohibition time. Specifically, UE 115-b can select a cellular prohibition time at 335 based on the type of communication service determined at 320, whether a link quality metric meets one or more link quality thresholds determined at 330, or both. Additionally or alternatively, UE 115-b can select a cellular prohibition time based on establishing a communication service at 305, initiating / executing a first setup procedure at 310, determining an SIB read failure and / or RLF at 315, or any combination thereof. In some aspects, UE 115-b can select a cellular prohibition time from a set of cellular prohibition times configured at UE 115-b. For example, UE 115-b can be configured to have a default cellular prohibition time and one or more additional cellular prohibition times (e.g., one or more shortened cellular prohibition times). In some aspects, the default cellular prohibition time may include 30 seconds, 300 seconds, or some other duration. In comparison, one or more additional / shortened cell blocking times may include 3 seconds, 7 seconds, or some other duration.

[0112] In some scenarios, UE 115-b can be based on communication services, including performance-critical communication services (e.g., VoLTE calls, VoNR calls, gaming communication services), or on one or more link quality metrics that meet one or more link quality thresholds (e.g., determining RSRP). Cell ≤Thresh RSRP ,RSRQ Cell ≤Thresh RSRQ SNR Cell ≤Thresh SNR SINR Cell ≤Thresh SINR Error FTL ≥Thresh FTL , or Error TTL ≥Thresh TTL UE 115-b can select a cell blocking time different from the default cell blocking time, or both. In additional or alternative scenarios, if the communication service includes performance-critical communication services, UE 115-b may select a cell blocking time different from the default cell blocking time (e.g., a shortened cell blocking time) even if the link quality thresholds are not met. In some scenarios, UE 115-b may select different cell blocking times for different communication services (e.g., different shortened cell blocking times). For example, different cell blocking times may be selected based on different categories (e.g., voice calls, game communication services). Conversely, in other scenarios, if the link quality thresholds are met, UE 115-b may select a cell blocking time different from the default cell blocking time (e.g., a shortened cell blocking time) even if the communication service does not include performance-critical communication services.

[0113] For example, UE 115-b may determine at 320 that the communication service does not include performance-critical communication services. In such a case, if the link quality metrics(s) at 330 meet the link quality threshold(s), then UE 115-b may select a cell blackout period (e.g., a shortened cell blackout period) (e.g., if RSRP...). Cell ≤Thresh RSRP ,RSRQ Cell ≤Thresh RSRQ If the link quality metrics at 330 fail to meet the link quality thresholds, then UE 115-b may select a second cell prohibition time (e.g., the default cell prohibition time) (e.g., if RSRP...). Cell Thresh RSRP ,RSRQCell Thresh RSRQQ If the link quality metrics at 330 points fail to meet the link quality thresholds, UE 115-b may choose a shortened cell blocking time if the communication service includes performance-critical communication services, and UE 115-a may choose a default cell blocking time if the communication service does not include performance-critical communication services.

[0114] In some scenarios, UE 115-b may compare (various) link quality metrics with multiple link quality thresholds at 330, and may select a cell prohibition time at 335 based on which link quality thresholds are met and / or the number of link quality thresholds met. For example, UE 115-b may be configured to have a first shortened cell prohibition time (e.g., a 7-second cell prohibition time) and a second shortened cell prohibition time (e.g., a 3-second cell prohibition time). In this example, UE 115-b may select a cell prohibition time at 330 from the first shortened cell prohibition time and the second shortened cell prohibition time depending on which link quality thresholds are met. For example, if the link quality metric meets the first link quality threshold but fails to meet the second link quality threshold, UE 115-b may select the first shortened cell prohibition time (e.g., if RSRP is met). Cell ≤Thresh RSRP 1 However, RSRP Cell ≤Thresh RSRP 2 If the link quality metric meets both the first and second link quality thresholds, then UE 115-b can select the second shortened cell prohibition time (e.g., if RSRP...). Cell ≤Thresh RSRP 1 And RSRP Cell ≤Thresh RSRP 2 Then select the second shortened cell prohibition time.

[0115] At point 340, UE 115-b may add first cell 205-c to the list of prohibited cells 205 (and / or remove first cell 205-c from the list of available cells 205). In some aspects, UE 115-b may add first cell 205-c to the list of prohibited cells 205 based on a selected cell prohibition time. Specifically, UE 115-b may add first cell 205-c to the list of prohibited cells 205 for up to 335 times the duration of the selected cell prohibition time. In this regard, UE 115-b can add the first cell 205-c to the list of prohibited cells for a longer duration (e.g., 30 seconds, 300 seconds) when UE 115-b selects a default cell prohibition time at 335, and can add the first cell 205-c to the list of prohibited cells for a shorter duration (e.g., 3 seconds, 7 seconds, 10 seconds) when UE 115-b selects a shortened cell prohibition time at 335.

[0116] At 345, UE 115-b may initiate a cell reselection procedure. By initiating a cell reselection procedure, UE 115-b may scan other cells 205 and attempt to attach (e.g., camp) on a cell 205 not included in the list of prohibited cells 205. In this regard, UE 115-b may initiate a cell reselection procedure at 345 based on selecting a cell prohibition time at 335, adding a first cell 205-c to the list of prohibited cells 205 at 340, or both. Additionally or alternatively, UE 115-b may initiate a cell reselection procedure based on establishing a communication service at 305, initiating / executing a first establishment procedure at 310, determining an SIB read failure and / or RLF at 315, determining the type of communication service at 320, determining one or more link quality metrics at 325, comparing the link quality metrics with a link quality threshold at 330, or any combination thereof.

[0117] At position 350, UE 115-b can scan other cells 205. Specifically, UE 115-b can scan cells 205 that are different from the first cell 205-c and are not included in the list of prohibited cells 205. For example, as Figure 3As shown, UE 115-b can scan a second cell 205-d that is different from the first cell 205-c. In some aspects, UE 115-b can scan other cells 205 based on selecting a cell blocking time at 335, adding the first cell 205-c to the list of blocked cells 205 at 340, or both. In some cases, UE 115-b can scan other cells 205 as part of a cell reselection procedure. Accordingly, in some cases, UE 115-b can scan cells 205 that are different from the first cell 205-c during the duration of the selected cell blocking time at 335. In some cases, UE 115-b can initiate a setup procedure with the second cell 205-d based on scanning the second cell 205-d at 350, establishing a connection with the second cell 205-b, or both. Conversely, if UE 115-b is unable to attach to / camp in another cell 205 (e.g., second cell 205-b), a "no service" indication may be sent to the NAS layer of UE 115-b.

[0118] At point 355, UE 115-b can determine the expiration of the selected cell prohibition period. In this regard, UE 115-b can determine the expiration of the selected cell prohibition period based on the duration of the selected cell prohibition period and the time when the selected cell prohibition period was selected and / or initiated. For example, in the case where UE 115-b selects a shortened cell prohibition period of 7 seconds, UE 115-b can determine the expiration of the shortened cell prohibition period 7 seconds after selecting the shortened cell prohibition period, 7 seconds after adding the first cell 205-c to the list of prohibited cells, or both.

[0119] At 360, UE 115-b may remove the first cell 205-c from the list of prohibited cells. In some aspects, UE 115-b may remove the first cell 205-c from the list of prohibited cells based on the expiration of the cell prohibition period determined at 355. For example, upon determining the expiration of the cell prohibition period, UE 115-b may remove the first cell 205-c from the list of prohibited cells, allowing UE 115-b to attempt to reattach to the first cell 205-c (e.g., camp on it).

[0120] At point 365, UE 115-b may execute (e.g., initiate) a second establishment procedure with the first cell 205-c. In some aspects, UE 115-b may initiate the second establishment procedure with the first cell 205-c based on removing the first cell 205-c from the list of prohibited cells 205 at point 360. In some aspects, UE 115-b may establish (re-establish) a radio connection with the first cell 205-c based on initiating the second establishment procedure with the first cell 205-c at point 365. In some cases, by adding the first cell 205-c to the list of prohibited cells for a shorter duration (e.g., for a shortened cell prohibition period), the techniques described herein can enable UE 115-b to attempt to re-establish a connection with the first cell more quickly in cases where it is unable to establish a connection with another cell 205 during the cell prohibition period, thereby reducing the duration of UE 115-b's no-service experience.

[0121] The techniques described herein provide improved wireless communication by reducing the duration of no-service for UE 115-b. Specifically, by selecting a shorter cell blocking time, the techniques described herein enable UE 115-b to scan for new cells 205 and retry communication with the blocked cell 205 (first cell 205-a) after a short duration. This reduces the no-service time for UE 115-b and prevents the failure of performance-critical communication services. By reducing the no-service time for UE 115-b, the techniques described herein reduce power consumption at UE 115-b, enabling more timely service recovery and improved user experience.

[0122] Figure 4 Figure 400 illustrates an apparatus 405 supporting techniques for cell prohibition time selection according to various aspects of this disclosure. Apparatus 405 may be an example of various aspects of UE 115 as described herein. Apparatus 405 may include a receiver 410, a transmitter 415, and a communications manager 420. Apparatus 405 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0123] Receiver 410 may provide means for receiving information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques for cell prohibition time selection). The information may be transmitted to other components of device 405. Receiver 410 may utilize a single antenna or multiple antennas.

[0124] Transmitter 415 may provide means for transmitting signals generated by other components of device 405. In some examples, transmitter 415 may coexist with receiver 410 in a transceiver module. Transmitter 415 may utilize a single antenna or multiple antennas.

[0125] The communication manager 420, receiver 410, transmitter 415, or various combinations thereof, or various components thereof, may be examples of apparatuses for performing various aspects of the techniques for cell prohibition time selection as described herein.

[0126] In some examples, the communication manager 420, receiver 410, transmitter 415, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuitry system). This circuitry system may include a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (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 this disclosure.

[0127] Additionally or alternatively, in some examples, the communication manager 420, receiver 410, transmitter 415, or various combinations or components thereof, may be implemented by code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functions of the communication manager 420, receiver 410, transmitter 415, or various combinations or components thereof may be performed by a general-purpose processor, DSP, central processing unit (CPU), ASIC, FPGA, or some other programmable logic device.

[0128] In some examples, the communication manager 420 may be configured to use or otherwise cooperate with the receiver 410, transmitter 415, or both to perform various operations (e.g., receiving, monitoring, transmitting).

[0129] According to the examples disclosed herein, the communication manager 420 may support wireless communication at a user equipment (UE). For example, the communication manager 420 may be configured to provide or support means for initiating a first establishment procedure with a first cell supported by a base station. The communication manager 420 may be configured to provide or support means for determining an SIB read failure, RLF, or both, at least in part, based on initiating the first establishment procedure. The communication manager 420 may be configured to provide or support means for identifying the type of communication service established via the base station. The communication manager 420 may be configured to provide or support means for determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The communication manager 420 may be configured to provide or support means for selecting a cell blocking time, at least in part, based on the type of communication service, whether the link quality metric meets a link quality threshold, or both. The communication manager 420 may be configured to provide or support means for initiating a cell reselection procedure, at least in part, based on the cell blocking time.

[0130] By including or configuring a communication manager 405 according to the example described herein, device 405 can support improved techniques for selecting cell blocking times. For example, by selecting a shorter cell blocking time, the techniques described herein enable UE 115 to scan for new cells and retry communication with blocked cells after a short duration, which reduces UE 115's service outage time and prevents failure of performance-critical communication services. By reducing UE 115's service outage time, the techniques described herein can reduce power consumption at UE 115, restore service more promptly, and improve user experience.

[0131] By adaptively selecting the cell blocking time, the processor of UE 115 (e.g., the processor of the control receiver 410, communication manager 420, transmitter 415, etc.) can reduce the processing resources used by the cell reselection procedure and / or cell attachment procedure. For example, by adaptively selecting the cell blocking time, the techniques described herein can reduce the duration of no-service experience for UE 115, which can reduce the power consumption and signaling associated with executing the cell attachment procedure and / or cell reselection procedure. By reducing power consumption, the battery life of UE 115 can be improved, and the signaling associated with the cell reselection procedure can be reduced, thereby correspondingly reducing the number of times the processor ramps up processing power and opens processing units to handle uplink transmissions and / or downlink receptions. Furthermore, by reducing the duration of no-service experience for UE 115, service can be quickly re-established at UE 115, thereby improving the user experience.

[0132] Figure 5Figure 500 illustrates an apparatus 505 supporting techniques for cell prohibition time selection according to various aspects of this disclosure. Apparatus 505 may be an example of aspects of apparatus 405 or UE 115 as described herein. Apparatus 505 may include a receiver 510, a transmitter 515, and a communications manager 520. Apparatus 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0133] Receiver 510 may provide means for receiving information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques for cell prohibition time selection). The information may be transmitted to other components of device 505. Receiver 510 may utilize a single antenna or multiple antennas.

[0134] Transmitter 515 may provide means for transmitting signals generated by other components of device 505. In some examples, transmitter 515 may coexist with receiver 510 in a transceiver module. Transmitter 515 may utilize a single antenna or multiple antennas.

[0135] Device 505 or its various components may be examples of means for performing various aspects of the techniques for cell prohibition time selection as described herein. For example, communication manager 520 may include setup procedure manager 525, RLF manager 530, communication service manager 535, link quality manager 540, cell prohibition time manager 545, reselection procedure manager 550, or any combination thereof. Communication manager 520 may be examples of various aspects of communication manager 420 as described herein. In some examples, communication manager 520 or its various components may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using receiver 510, transmitter 515, or both, or otherwise in cooperation with receiver 510, transmitter 515, or both.

[0136] According to the examples disclosed herein, the communication manager 520 can support wireless communication at the UE. The setup procedure manager 525 can be configured to provide or support means for initiating a first setup procedure with a first cell supported by a base station. The RLF manager 530 can be configured to provide or support means for determining SIB read failure, RLF, or both based on initiating the first setup procedure. The communication service manager 535 can be configured to provide or support means for identifying the type of communication service established via the base station. The link quality manager 540 can be configured to provide or support means for determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The cell prohibition time manager 420 can be configured to provide or support means for selecting a cell prohibition time based on the type of communication service, whether a link quality metric meets a link quality threshold, or both. The reselection procedure manager 550 can be configured to provide or support means for initiating a cell reselection procedure based on a cell prohibition time.

[0137] Figure 6 Figure 600 illustrates a communication manager 620 supporting techniques for cell prohibition time selection according to various aspects of this disclosure. The communication manager 620 may be an example of aspects of the communication manager 420, communication manager 520, or both described herein. The communication manager 620 or its various components may be examples of apparatuses for implementing various aspects of the techniques for cell prohibition time selection as described herein. For example, the communication manager 620 may include a setup procedure manager 625, an RLF manager 630, a communication service manager 635, a link quality manager 640, a cell prohibition time manager 645, a reselection procedure manager 650, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0138] According to the examples disclosed herein, the communication manager 620 can support wireless communication at the UE. The setup procedure manager 625 can be configured to provide or support means for initiating a first setup procedure with a first cell supported by a base station. The RLF manager 630 can be configured to provide or support means for determining SIB read failure, RLF, or both based on initiating the first setup procedure. The communication service manager 635 can be configured to provide or support means for identifying the type of communication service established via the base station. The link quality manager 640 can be configured to provide or support means for determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The cell prohibition time manager 645 can be configured to provide or support means for selecting a cell prohibition time based on the type of communication service, whether a link quality metric meets a link quality threshold, or both. The reselection procedure manager 650 can be configured to provide or support means for initiating a cell reselection procedure based on a cell prohibition time.

[0139] In some examples, to initiate a cell reselection procedure based on a cell prohibition time, the cell prohibition time manager 645 may be configured to provide or support means for adding a first cell to the list of prohibited cells based on the selected cell prohibition time. In some examples, to initiate a cell reselection procedure based on a cell prohibition time, the reselection procedure manager 650 may be configured to provide or support means for scanning cells different from the first cell based on adding the first cell to the list of prohibited cells.

[0140] In some examples, the Cell Prohibition Time Manager 645 may be configured to provide or support means for determining the expiration of a cell prohibition time. In some examples, the Cell Prohibition Time Manager 645 may be configured to provide or support means for removing a first cell from the list of prohibited cells based on the determination of the expiration of the cell prohibition time. In some examples, the Establishment Procedure Manager 625 may be configured to provide or support means for initiating a second establishment procedure with the first cell based on the removal of the first cell from the list of prohibited cells.

[0141] In some examples, the communication service manager 635 can be configured to provide or support means for determining whether the type of a communication service is one of a predefined set of performance-critical communication services.

[0142] In some examples, the selection of cell blocking time is based on determining the type of communication service, which is one of a predefined set of performance-critical communication services.

[0143] In some examples, the predefined set of communication services includes Long Term Evolution Voice (VoLTE) calls, New Radio Voice (VoNR) calls, gaming communication services, or any combination thereof.

[0144] In some examples, the Cell Blocking Time Manager 645 may be configured to provide or support means for selecting a second cell blocking time different from the cell blocking time if the link quality metric fails to meet the link quality threshold.

[0145] In some examples, the cell injunction duration is shorter than the second cell injunction duration.

[0146] In some examples, the Cell Prohibition Time Manager 645 may be configured to provide or support means for determining a set of cell prohibition times. In some examples, the Link Quality Manager 640 may be configured to provide or support means for determining if a link quality metric meets a link quality threshold. In some examples, the Link Quality Manager 640 may be configured to provide or support means for determining if a link quality metric fails to meet a second link quality threshold different from the first. In some examples, the Cell Prohibition Time Manager 645 may be configured to provide or support means for selecting cell prohibition times from the set of cell prohibition times based on determining that a link quality metric meets the first link quality threshold but fails to meet the second link quality threshold.

[0147] In some examples, the link quality manager 640 may be configured to provide or support means for determining an RSRP metric associated with a first cell, an RSRQ metric associated with a first cell, an SNR metric associated with a first cell, a SINR metric associated with a first cell, or any combination thereof, wherein the link quality metric includes an RSRP metric, an RSRQ metric, an SNR metric, a SINR metric, or any combination thereof.

[0148] In some examples, the communication service manager 635 may be configured to provide or support means for determining a bearer type associated with a communication service, a latency metric associated with a communication service, a quality of service metric associated with a communication service, a reliability metric associated with a communication service, or any combination thereof, wherein the determination of the type of communication service is based on the determined bearer type, the determined latency metric, the determined quality of service metric, the determined reliability metric, or any combination thereof.

[0149] In some examples, the communication service manager 635 may be configured to provide or support means for receiving an indication of the type of communication service from a higher layer of the UE, wherein the type of communication service is determined based on receiving the indication from the higher layer of the UE.

[0150] In some examples, the communication service manager 635 may be configured to provide or support means for establishing a communication service in connectivity operation mode before initiating the first establishment procedure, wherein determining SIB read failure, RLF, or both is based on establishing a communication service in connectivity operation mode.

[0151] Figure 7 A diagram of a system 700 including device 705 supporting technology for cell blackout time selection is shown according to various aspects of this disclosure. Device 705 may be an example of device 505 or UE 115 as described herein, or may include components thereof. Device 705 may wirelessly communicate with one or more base stations 105, UE 115, or any combination thereof. Device 705 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 710, I / O controller 715, transceiver 720, antenna 725, memory 730, code 735, and processor 740. These components may be in electronic communication or otherwise coupled (e.g., operational ground, communication ground, functional ground, electronic ground, electrical ground) via one or more buses (e.g., bus 745).

[0152] The I / O controller 715 manages the input and output signals of device 705. The I / O controller 715 can also manage peripheral devices not integrated into device 705. In some cases, the I / O controller 715 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 715 may utilize an operating system, such as... Or another known operating system. In other cases, the I / O controller 715 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 715 may be implemented as part of a processor. In some cases, a user may interact with the device 705 via the I / O controller 715 or via hardware components controlled by the I / O controller 715.

[0153] In some cases, device 705 may include a single antenna 725. However, in other cases, the device may have more than one antenna 725, which may be capable of transmitting or receiving multiple wireless transmissions concurrently. Transceiver 720 may communicate bidirectionally via one or more antennas 725, wired or wireless links, as described herein. For example, transceiver 720 may represent a wireless transceiver and be capable of bidirectional communication with another wireless transceiver. Transceiver 720 may also include a modem for modulating packets and providing modulated packets to one or more antennas 725 for transmission, and for demodulating packets received from one or more antennas 725. Transceiver 720, or transceiver 720 and one or more antennas 725, may be an example of transmitter 415, transmitter 515, receiver 410, receiver 510, or any combination thereof or components thereof as described herein.

[0154] Memory 730 may include random access memory (RAM) and read-only memory (ROM). Memory 730 may store computer-readable, computer-executable code 735, including instructions that, when executed by processor 740, cause device 705 to perform the various functions described herein. Code 735 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 735 may not be directly executed by processor 740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, memory 730 may, in particular, include a basic I / O system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0155] Processor 740 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, central processing units (CPUs), microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 740 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 740. Processor 740 may be configured to execute computer-readable instructions stored in memory (e.g., memory 730) to cause device 705 to perform various functions (e.g., functions or tasks supporting technologies for cell time-disabled selection).

[0156] According to the examples disclosed herein, the communication manager 710 may support wireless communication at the UE. For example, the communication manager 710 may be configured to provide or support means for initiating a first establishment procedure with a first cell supported by a base station. The communication manager 710 may be configured to provide or support means for determining SIB read failure, RLF, or both based on initiating the first establishment procedure. The communication manager 710 may be configured to provide or support means for identifying the type of communication service established via the base station. The communication manager 710 may be configured to provide or support means for determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The communication manager 710 may be configured to provide or support means for selecting a cell blocking time based on the type of communication service, whether the link quality metric meets a link quality threshold, or both. The communication manager 710 may be configured to provide or support means for initiating a cell reselection procedure based on a cell blocking time.

[0157] By including or configuring a communication manager 710 according to the example described herein, device 705 can support improved techniques for selecting cell blocking times. For example, by selecting a shorter cell blocking time, the techniques described herein enable UE 115 to scan for new cells and retry communication with blocked cells after a short duration, which reduces UE 115's service-free time and prevents failure of performance-critical communication services. By reducing UE 115's service-free time, the techniques described herein can reduce power consumption at UE 115, restore service more promptly, and improve user experience.

[0158] In some examples, the communication manager 710 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using transceiver 720, one or more antennas 725, or any combination thereof, or otherwise in cooperation with transceiver 1915, one or more antennas 1925, or any combination thereof. Although the communication manager 710 is described as a separate component, in some examples, one or more functions described with reference to the communication manager 710 may be supported or performed by processor 740, memory 730, code 735, or any combination thereof. For example, code 735 may include instructions executable by processor 740 to cause device 705 to perform various aspects of the techniques for cell prohibition time selection as described herein, or processor 740 and memory 730 may be otherwise configured to perform or support such operations.

[0159] Figure 8A flowchart illustrating a method 800 for selecting a cell prohibition time according to various aspects of this disclosure is shown. Operation of method 800 can be implemented by a UE or its components as described herein. For example, operation of method 800 can be implemented by, as referred to... Figures 1 to 7 The UE 115 described herein performs the function. In some examples, the UE can execute a set of instructions to control the functional elements of the device to perform the described function. Alternatively or alternatively, the UE may use dedicated hardware to perform aspects of the described function.

[0160] At point 805, the method may include initiating a first establishment procedure for a first cell supported by a base station. Operation of point 805 may be performed according to the method described herein. In some examples, aspects of operation of point 805 may be as described in reference... Figure 6 The described setup procedure manager 625 is used to execute this.

[0161] At 810, the method may include determining, at least in part, a SIB read failure, an RLF, or both, based on initiating a first setup procedure. The operation of 810 may be performed according to the methods described herein. In some examples, aspects of the operation of 810 may be determined by, as referenced... Figure 6 The described RLF Manager 630 is used for execution.

[0162] At 815, the method may include determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The operation of 815 may be performed according to the method described herein. In some examples, aspects of the operation of 815 may be determined by reference to... Figure 6 The described link quality manager 640 is used to perform this.

[0163] At 820, the method may include selecting a cell blocking time based at least in part on the type of communication service established via the base station, whether a link quality metric meets a link quality threshold, or both. Operation of 820 may be performed according to the method described herein. In some examples, aspects of operation of 820 may be derived from, as referenced... Figure 6 The described cell prohibits the execution of Time Manager 645.

[0164] At point 825, the method may include initiating a cell reselection procedure, at least in part, based on the cell prohibition time. The operation of point 825 may be performed according to the method described herein. In some examples, aspects of the operation of point 825 may be derived from, as referenced... Figure 6 The described reselection procedure manager 650 is used to execute this.

[0165] Figure 9A flowchart illustrating a method 900 for selecting a cell prohibition time according to various aspects of this disclosure is shown. Operation of method 900 can be implemented by a UE or its components as described herein. For example, operation of method 900 can be implemented by, as referred to... Figures 1 to 7 The UE 115 described herein performs the function. In some examples, the UE can execute a set of instructions to control the functional elements of the device to perform the described function. Alternatively or alternatively, the UE may use dedicated hardware to perform aspects of the described function.

[0166] At 905, the method may include initiating a first establishment procedure for a first cell supported by a base station. Operation at 905 may be performed according to the method described herein. In some examples, aspects of operation at 905 may be as described in reference... Figure 6 The described setup procedure manager 625 is used to execute this.

[0167] At 910, the method may include determining, at least in part, a SIB read failure, an RLF, or both, based on initiating a first setup procedure. The operation of 910 may be performed according to the method described herein. In some examples, aspects of the operation of 910 may be determined by, as referenced... Figure 6 The described RLF Manager 630 is used for execution.

[0168] At 915, the method may include determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The operation of 915 may be performed according to the method described herein. In some examples, aspects of the operation of 915 may be determined by reference to... Figure 6 The described link quality manager 640 is used to perform this.

[0169] At point 920, the method may include selecting a cell blocking time based at least in part on the type of communication service established via the base station, whether a link quality metric meets a link quality threshold, or both. Operation at point 920 may be performed according to the method described herein. In some examples, aspects of operation at point 920 may be derived from, as referenced... Figure 6 The described cell prohibits the execution of Time Manager 645.

[0170] At 925, the method may include adding a first cell to the list of prohibited cells, at least in part, based on the selected cell prohibition time. The operation at 925 may be performed according to the method described herein. In some examples, aspects of the operation at 925 may be derived from, as referenced... Figure 6 The described cell prohibits the execution of Time Manager 645.

[0171] At 930, the method may include initiating a cell reselection procedure, at least in part, based on the cell prohibition time. The operation at 930 may be performed according to the method described herein. In some examples, aspects of the operation at 930 may be derived from, as referenced... Figure 6 The described reselection procedure manager 650 is used to execute this.

[0172] At 935, the method may include scanning for cells different from the first cell, at least in part, based on adding the first cell to the list of prohibited cells. The operation of 935 may be performed according to the method described herein. In some examples, aspects of the operation of 935 may be derived from, as referenced... Figure 6 The described reselection procedure manager 650 is used to execute this.

[0173] At 940, the method may include determining the expiration of the cell prohibition period. The operation at 940 may be performed according to the method described herein. In some examples, aspects of the operation at 940 may be derived from, as referenced... Figure 6 The described cell prohibits the execution of Time Manager 645.

[0174] At 945, the method may include removing a first cell from the list of prohibited cells based at least in part on the expiration of a determined cell prohibition period. The operation at 945 may be performed according to the method described herein. In some examples, aspects of the operation at 945 may be derived from, as referenced... Figure 6 The described cell prohibits the execution of Time Manager 645.

[0175] At 950, the method includes initiating a second establishment procedure with the first cell, at least in part, based on removing the first cell from the list of prohibited cells. The operation of 950 can be performed according to the method described herein. In some examples, aspects of the operation of 950 can be derived from, as referenced... Figure 6 The described setup procedure manager 625 is used to execute this.

[0176] Figure 10 A flowchart illustrating a method 1000 for supporting techniques for cell prohibition time selection according to various aspects of this disclosure is shown. Operation of method 1000 can be implemented by a UE or its components as described herein. For example, operation of method 1000 can be performed by, as referred to... Figures 1 to 7 The UE 115 described herein performs the function. In some examples, the UE can execute a set of instructions to control the functional elements of the device to perform the described function. Alternatively or alternatively, the UE may use dedicated hardware to perform aspects of the described function.

[0177] At point 1005, the method may include initiating a first establishment procedure for a first cell supported by a base station. The operation of point 1005 may be performed according to the method described herein. In some examples, aspects of the operation of point 1005 may be as described in reference to... Figure 6 The described setup procedure manager 625 is used to execute this.

[0178] At 1010, the method may include determining, at least in part, a SIB read failure, an RLF, or both, based on initiating a first setup procedure. The operation of 1010 may be performed according to the method described herein. In some examples, aspects of the operation of 1010 may be determined by, as referenced... Figure 6 The described RLF Manager 630 is used for execution.

[0179] At point 1015, the method may include determining whether the type of communication service established via the base station is one of a predefined set of performance-critical communication services. The operation at point 1015 may be performed according to the method described herein. In some examples, aspects of the operation at point 1015 may be determined by reference to... Figure 6 The described communication service manager 635 is used to execute this.

[0180] At point 1020, the method may include determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold. The operation of point 1020 may be performed according to the method described herein. In some examples, aspects of the operation of point 1020 may be determined by reference to... Figure 6 The described link quality manager 640 is used to perform this.

[0181] At point 1025, the method may include selecting the cell blocking time based at least in part on the type of communication service, whether a link quality metric meets a link quality threshold, or both. The operation at point 1025 may be performed according to the method described herein. In some examples, aspects of the operation at point 1025 may be derived from, as referenced... Figure 6 The described cell prohibits the execution of Time Manager 645.

[0182] At 1030, the method may include initiating a cell reselection procedure, at least in part, based on the cell prohibition time. The operation of 1030 may be performed according to the method described herein. In some examples, aspects of the operation of 1030 may be derived from, as referenced... Figure 6 The described reselection procedure manager 650 is used to execute this.

[0183] The following provides an overview of the various aspects of this disclosure:

[0184] Aspect 1: A method for wireless communication at a UE, comprising: initiating a first setup procedure with a first cell supported by a base station; determining an SIB read failure, an RLF, or both based at least in part on initiating the first setup procedure; determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold; selecting a cell blocking time based at least in part on the type of communication service established via the base station, whether the link quality metric meets the link quality threshold, or both; and initiating a cell reselection procedure based at least in part on the cell blocking time.

[0185] Aspect 2: The method of Aspect 1, wherein initiating a cell reselection procedure based at least in part on a cell prohibition time includes: adding a first cell to a list of prohibited cells based at least in part on a cell prohibition time; and scanning cells different from the first cell based at least in part on adding the first cell to the list of prohibited cells.

[0186] Aspect 3: The method of aspect 2 further includes: determining the expiration of the cell prohibition period; removing the first cell from the list of prohibited cells at least in part based on determining the expiration of the cell prohibition period; and initiating a second establishment procedure with the first cell at least in part based on removing the first cell from the list of prohibited cells.

[0187] Aspect 4: The method of any one of Aspects 1 to 3 further includes: determining whether the type of the communication service is a communication service in a predefined set of performance-critical communication services.

[0188] Aspect 5: The method of aspect 4, wherein the selection of the cell blocking time is at least in part based on determining that the type of communication service is one of a predefined set of performance-critical communication services.

[0189] Aspect 6: The method of aspect 5, wherein the predefined set of communication services includes VoLTE calls, VoNR calls, gaming communication services, or any combination thereof.

[0190] Aspect 7: The method of any one of Aspects 5 and 6, wherein the type of communication service is not one of the communication services in a predefined set of performance-critical communication services, the method further comprising: if the link quality metric fails to meet the link quality threshold, selecting a second cell prohibition time different from the cell prohibition time; and if the link quality metric meets the link quality threshold, selecting the cell prohibition time.

[0191] Aspect 8: The method of aspect 7, wherein the prohibition time of the cell is shorter than the prohibition time of the second cell.

[0192] Aspect 9: The method of any one of Aspects 1 to 8 further includes: determining a set of cell prohibition times; determining that a link quality metric satisfies a link quality threshold; determining that the link quality metric fails to satisfy a second link quality threshold different from the link quality threshold; and selecting cell prohibition times from the set of cell prohibition times based at least in part on determining that the link quality metric satisfies the link quality threshold and fails to satisfy the second link quality threshold.

[0193] Aspect 10: The method of any one of Aspects 1 to 9 further includes: determining an RSRP metric associated with the first cell, an RSRQ metric associated with the first cell, an SNR metric associated with the first cell, a SINR metric associated with the first cell, or any combination thereof, wherein the link quality metric includes an RSRP metric, an RSRQ metric, an SNR metric, a SINR metric, or any combination thereof.

[0194] Aspect 11: The method of any one of Aspects 1 to 10 further includes: determining a bearer type associated with a communication service, a latency metric associated with a communication service, a QoS metric associated with a communication service, a reliability metric associated with a communication service, or any combination thereof, wherein the determination of the type of communication service is based at least in part on the determined bearer type, the determined latency metric, the determined QoS metric, the determined reliability metric, or any combination thereof.

[0195] Aspect 12: The method of any one of Aspects 1 to 11 further includes: receiving an indication of the type of communication service from a higher layer of the UE, wherein the type of communication service is determined at least in part based on receiving the indication from the higher layer of the UE.

[0196] Aspect 13: The method of any one of Aspects 1 to 12 further includes: establishing a communication service in a connectivity operation mode before initiating a first establishment procedure, wherein determining that an SIB read failure, an RLF, or both is at least partially based on establishing a communication service in the connectivity operation mode.

[0197] Aspect 14: An apparatus for wireless communication at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as described in any one of Aspects 1 to 13.

[0198] Aspect 15: An apparatus for wireless communication at a UE, comprising at least one means for performing the method of any one of Aspects 1 to 13.

[0199] Aspect 16: A non-transient computer-readable medium storing code for wireless communication at a UE, the code including instructions executable by a processor to perform methods as described in any of Aspects 1 to 13.

[0200] It should be noted that the methods described in this paper describe possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are also possible. Furthermore, aspects from two or more methods can be combined.

[0201] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein can also be applied to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques can be applied to a variety of other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0202] The information and signals described herein can be represented using any of a wide variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof.

[0203] The various illustrative boxes and components described herein can be implemented or executed using a general-purpose processor, DSP, ASIC, CPU, 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. The general-purpose processor may be a microprocessor, but in alternatives, the processor may be any processor, controller, microcontroller, or state machine. The 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 working in conjunction with a DSP core, or any other such configuration).

[0204] 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 or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed such that different parts of the function are implemented at different physical locations.

[0205] Computer-readable media includes both non-transient computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Non-transient storage media can be any available medium accessible to a general-purpose or special-purpose computer. By way of example and not limitation, non-transient computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transient medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Similarly, any connection is also legitimately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then that coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable media. As used in this article, disk and disc include CDs, laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks often magnetically reproduce data while discs optically reproduce data using lasers. Combinations of these media are also included within the scope of computer-readable media.

[0206] 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 or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations fall within the scope and spirit of this disclosure and the appended claims. For example, due to the nature of software, the above-described functions may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed such that the parts of the functions are implemented at different physical locations. As used herein (including in the claims), the term “and / or” in a list of two or more items means that any one of the listed items may be employed individually, or any combination of two or more listed items may be employed. For example, if a composition is described as comprising components A, B, and / or C, then the composition may comprise only A; only B; only C; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C. Similarly, as used herein (including in the claims), the “or” used in an item enumeration (e.g., in an item enumeration followed by a phrase such as “at least one of” or “one or more of”) indicates a disjunctive enumeration such that an enumeration such as “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).

[0207] Additionally, as used herein, the phrase “based on” should not be interpreted as referencing a closed set of conditions. For example, an example step described as “based on condition A” may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase “based on” should be interpreted in the same way as the phrase “at least partially based on”.

[0208] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, components of the same type may be distinguished by a dash following the reference numeral and a second reference numeral used to differentiate between similar components. If only the first reference numeral is used in the description, the description may apply to any of the similar components having the same first reference numeral, regardless of the second reference numeral or other subsequent reference numerals.

[0209] This document, illustrated with reference to the accompanying drawings, describes exemplary configurations but does not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not imply "superior" or "outperforming" other examples. This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0210] The description provided herein is intended to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the universal principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for performing wireless communication at a user equipment (UE), comprising: Initiating and establishing the first cell setup procedure supported by the network access node; The system determines whether the failure is due to a system information block read failure, a radio link failure, or both, based at least in part on the initiation of the first establishment procedure. The type of communication service established via the network access node is identified by determining whether the communication service includes performance-critical communication services; Determine whether the link quality metric associated with the communication between the UE and the first cell meets the link quality threshold; Cellular blocking time is selected at least in part based on the type of communication service established via the network access node and whether the link quality metric meets the link quality threshold; as well as The cellular reselection procedure is initiated at least in part based on the cell prohibition time.

2. The method of claim 1, wherein initiating the cell reselection procedure based at least in part on the cell prohibition time comprises: The first cell is added to the list of prohibited cells, at least in part, based on the selection of the cell prohibition time. as well as The scanning of cells different from the first cell is based at least in part on adding the first cell to the list of prohibited cells.

3. The method of claim 2, further comprising: Determine the expiration of the prohibited time period for the aforementioned cell; The first cell is removed from the list of prohibited cells based at least in part on the expiration of the cell prohibition period. as well as The second establishment procedure with the first cell is initiated, at least in part, based on removing the first cell from the list of prohibited cells.

4. The method of claim 1, further comprising: Determine whether the type of the communication service is one of the communication services in a predefined set of performance-critical communication services.

5. The method of claim 4, wherein the selection of the cell blocking time is at least in part based on determining that the type of the communication service is one of the predefined performance-critical communication service sets.

6. The method of claim 5, wherein the predefined set of performance-critical communication services includes LTE Voice (VoLTE) calls, VoNR (VoNR) calls, gaming communication services, or any combination thereof.

7. The method of claim 5, wherein the type of the communication service is not one of the communication services in the predefined set of performance-critical communication services, the method further comprising: If the link quality metric fails to meet the link quality threshold, a second cell blocking time, different from the cell blocking time, is selected. as well as If the link quality metric meets the link quality threshold, then the cell prohibition time is selected.

8. The method of claim 7, wherein the cell blocking time is shorter than the second cell blocking time.

9. The method of claim 1, further comprising: Determine the set of prohibited times for cellular cells; Determine that the link quality metric meets the link quality threshold; It was determined that the link quality metric failed to meet a second link quality threshold that was different from the original link quality threshold; as well as The cell prohibition time is selected from the set of cell prohibition times based at least in part on determining that the link quality metric meets the link quality threshold and fails to meet the second link quality threshold.

10. The method of claim 1, further comprising: Determine a reference signal received power (RSRP) metric associated with the first cell, a reference signal received quality (RSRQ) metric associated with the first cell, a signal-to-noise ratio (SNR) metric associated with the first cell, a signal-to-interference-plus-noise ratio (SINR) metric associated with the first cell, or any combination thereof, wherein the link quality metric includes the RSRP metric, the RSRQ metric, the SNR metric, the SINR metric, or any combination thereof.

11. The method of claim 1, further comprising: Determine the bearer type associated with the communication service, the latency metric associated with the communication service, the quality of service metric associated with the communication service, the reliability metric associated with the communication service, or any combination thereof, wherein the determination of the type of the communication service is based at least in part on the determined bearer type, the determined latency metric, the determined quality of service metric, the determined reliability metric, or any combination thereof.

12. The method of claim 1, further comprising: The type of the communication service is received from a higher layer of the UE, wherein the type of the communication service is determined at least in part based on the indication received from the higher layer of the UE.

13. The method of claim 1, further comprising: The communication service is established in connectivity operation mode before initiating the first establishment procedure, wherein it is determined that the system information block read failure, the radio link failure, or both are at least partially based on establishing the communication service in connectivity operation mode.

14. An apparatus for performing wireless communication at a user equipment (UE), comprising: processor; Memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor to cause the device to perform the following operations: Initiating and establishing the first cell setup procedure supported by the network access node; The determination of system information block read failure, radio link failure, or both is based at least in part on the initiation of the first establishment procedure; The type of communication service established via the network access node is identified by determining whether the communication service includes performance-critical communication services; Determine whether the link quality metric associated with the communication between the UE and the first cell meets the link quality threshold; Cell blocking time is selected at least in part based on the type of communication service established via the network access node and whether the link quality metric meets the link quality threshold; as well as The cellular reselection procedure is initiated at least in part based on the cell prohibition time.

15. The apparatus of claim 14, wherein the instructions for initiating the cell reselection procedure based at least in part on the cell prohibition time are executable by the processor to cause the apparatus to: The first cell is added to the list of prohibited cells, at least in part based on the selected cell prohibition time; and The scanning of cells different from the first cell is based at least in part on adding the first cell to the list of prohibited cells.

16. The apparatus of claim 15, wherein the instructions are further executable by the processor to cause the apparatus to: Determine the expiration of the prohibited time period for the aforementioned cell; The first cell is removed from the list of prohibited cells based at least in part on the expiration of the cell prohibition period. as well as The second establishment procedure with the first cell is initiated, at least in part, based on removing the first cell from the list of prohibited cells.

17. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: Determine whether the type of the communication service is one of the communication services in a predefined set of performance-critical communication services.

18. The apparatus of claim 17, wherein the selection of the cell blocking time is based at least in part on determining that the type of the communication service is one of the predefined performance-critical communication service sets.

19. The apparatus of claim 18, wherein the predefined set of performance-critical communication services includes Long Term Evolution (LTE) Voice over LTE (VoLTE) calls, New Radio Voice (VoNR) calls, gaming communication services, or any combination thereof.

20. The apparatus of claim 18, wherein the type of the communication service is not one of the predefined performance-critical communication service sets, and the instructions are further executable by the processor to cause the apparatus to: if the link quality metric fails to meet the link quality threshold, select a second cell blocking time different from the cell blocking time; and If the link quality metric meets the link quality threshold, then the cell prohibition time is selected.

21. The apparatus of claim 20, wherein the cell blocking time is shorter than the second cell blocking time.

22. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: Determine the set of prohibited times for cellular cells; Determine that the link quality metric meets the link quality threshold; It was determined that the link quality metric failed to meet a second link quality threshold that was different from the original link quality threshold; as well as The cell prohibition time is selected from the set of cell prohibition times based at least in part on determining that the link quality metric meets the link quality threshold and fails to meet the second link quality threshold.

23. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: Determine a reference signal received power (RSRP) metric associated with the first cell, a reference signal received quality (RSRQ) metric associated with the first cell, a signal-to-noise ratio (SNR) metric associated with the first cell, a signal-to-interference-plus-noise ratio (SINR) metric associated with the first cell, or any combination thereof, wherein the link quality metric includes the RSRP metric, the RSRQ metric, the SNR metric, the SINR metric, or any combination thereof.

24. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: Determine the bearer type associated with the communication service, the latency metric associated with the communication service, the quality of service metric associated with the communication service, the reliability metric associated with the communication service, or any combination thereof, wherein the determination of the type of the communication service is based at least in part on the determined bearer type, the determined latency metric, the determined quality of service metric, the determined reliability metric, or any combination thereof.

25. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: The type of the communication service is received from a higher layer of the UE, wherein the type of the communication service is determined at least in part based on the indication received from the higher layer of the UE.

26. The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: The communication service is established in connectivity operation mode before initiating the first establishment procedure, wherein it is determined that the system information block read failure, the radio link failure, or both are at least partially based on establishing the communication service in connectivity operation mode.

27. An apparatus for performing wireless communication at a user equipment (UE), comprising: A means for initiating a first establishment procedure for a first cell supported by a network access node; A means for determining, at least in part, a system information block read failure, a radio link failure, or both, based on initiating the first establishment procedure; A means for identifying the type of communication service established via the network access node by determining whether the communication service includes performance-critical communication services; A means for determining whether a link quality metric associated with communication between the UE and the first cell meets a link quality threshold; A means for selecting a cell blocking time based at least in part on the type of communication service established via the network access node and whether the link quality metric meets the link quality threshold; as well as A means for initiating a cell reselection procedure based at least in part on the cell prohibition time.

28. A non-transient computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor for the following operations: Initiating and establishing the first cell setup procedure supported by the network access node; The determination of system information block read failure, radio link failure, or both is based at least in part on the initiation of the first establishment procedure; The type of communication service established via the network access node is identified by determining whether the communication service includes performance-critical communication services; Determine whether the link quality metric associated with the communication between the UE and the first cell meets the link quality threshold; Cell blocking time is selected at least in part based on the type of communication service established via the network access node and whether the link quality metric meets the link quality threshold; as well as The cellular reselection procedure is initiated at least in part based on the cell prohibition time.

29. The non-transient computer-readable medium of claim 28, wherein the instructions for initiating the cell reselection procedure based at least in part on the cell prohibition time are executable by the processor to: The first cell is added to the list of prohibited cells, at least in part based on the selected cell prohibition time; and The scanning of cells different from the first cell is based at least in part on adding the first cell to the list of prohibited cells.

30. The non-transient computer-readable medium of claim 29, wherein the instructions are further executable by the processor to: Determine the expiration of the prohibited time period for the aforementioned cell; The first cell is removed from the list of prohibited cells based at least in part on the expiration of the cell prohibition period. as well as The second establishment procedure with the first cell is initiated, at least in part, based on removing the first cell from the list of prohibited cells.

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