Common cell-level information for multiple subscriptions
By sharing cell-level information across multiple subscriptions, the technique addresses inefficiencies in multi-subscription devices, reducing latency and improving power consumption and channel usage in wireless communications.
Patent Information
- Application Number
- PCT/CN2024/075425
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-08-07
AI Technical Summary
Multi-subscription wireless communications devices face challenges in efficiently communicating with the same cell due to separate handling of cell-level information for each subscription, leading to delays in radio link failure detection and redundant operations, which affect latency and power consumption.
The technique involves sharing cell-level information among multiple subscriptions of a wireless communications device, including parameters for connection control procedures such as radio link failure detection, cell selection, and de-prioritization, to optimize communication processes.
This approach reduces latency and improves channel usage and power consumption by minimizing redundant operations and enhancing the efficiency of radio connection controls across multiple subscriptions.
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Figure CN2024075425_07082025_PF_FP_ABST
Abstract
Description
COMMON CELL-LEVEL INFORMATION FOR MULTIPLE SUBSCRIPTIONS
[0001] INTRODUCTION
[0002] Field of the Disclosure
[0003] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for multi-subscription communications.
[0004] Description of Related Art
[0005] Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available wireless communications system resources with those users.
[0006] Although wireless communications systems have made great technological advancements over many years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Accordingly, there is a continuous desire to improve the technical performance of wireless communications systems, including, for example: improving speed and data carrying capacity of communications, improving efficiency of the use of shared communications mediums, reducing power used by transmitters and receivers while performing communications, improving reliability of wireless communications, avoiding redundant transmissions and / or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access wireless communications systems, increasing the ability for different types of devices to intercommunicate, increasing the number and type of wireless communications mediums available for use, and the like. Consequently, there exists a need for further improvements in wireless communications systems to overcome the aforementioned technical challenges and others.SUMMARY
[0007] One aspect provides a method for wireless communications by an apparatus. The method includes obtaining cell-level information associated with at least a first subscription, the cell-level information being specific to a cell; and communicating via a second subscription based at least in part on the cell-level information.
[0008] Other aspects provide: one or more apparatuses operable, configured, or otherwise adapted to perform any portion of any method described herein (e.g., such that performance may be by only one apparatus or in a distributed fashion across multiple apparatuses) ; one or more non-transitory, computer-readable media comprising instructions that, when executed by one or more processors of one or more apparatuses, cause the one or more apparatuses to perform any portion of any method described herein (e.g., such that instructions may be included in only one computer-readable medium or in a distributed fashion across multiple computer-readable media, such that instructions may be executed by only one processor or by multiple processors in a distributed fashion, such that each apparatus of the one or more apparatuses may include one processor or multiple processors, and / or such that performance may be by only one apparatus or in a distributed fashion across multiple apparatuses) ; one or more computer program products embodied on one or more computer-readable storage media comprising code for performing any portion of any method described herein (e.g., such that code may be stored in only one computer-readable medium or across computer-readable media in a distributed fashion) ; and / or one or more apparatuses comprising one or more means for performing any portion of any method described herein (e.g., such that performance would be by only one apparatus or by multiple apparatuses in a distributed fashion) . By way of example, an apparatus may comprise a processing system, a device with a processing system, or processing systems cooperating over one or more networks. An apparatus may comprise one or more memories; and one or more processors configured to cause the apparatus to perform any portion of any method described herein. In some examples, one or more of the processors may be preconfigured to perform various functions or operations described herein without requiring configuration by software.
[0009] The following description and the appended figures set forth certain features for purposes of illustration.BRIEF DESCRIPTION OF DRAWINGS
[0010] The appended figures depict certain features of the various aspects described herein and are not to be considered limiting of the scope of this disclosure.
[0011] FIG. 1 depicts an example wireless communications network.
[0012] FIG. 2 depicts an example disaggregated base station architecture.
[0013] FIG. 3 depicts aspects of an example base station and an example user equipment (UE) .
[0014] FIGS. 4A, 4B, 4C, and 4D depict various example aspects of data structures for a wireless communications network.
[0015] FIG. 5 illustrates an example wireless communications system where a UE has multiple subscriptions in communication with a network entity.
[0016] FIG. 6 illustrates an example architecture for sharing cell-level information among multiple subscriptions of a UE.
[0017] FIG. 7 depicts a process flow for performing cell selection at a UE having multiple subscriptions.
[0018] FIG. 8 depicts a process flow for performing radio link failure detection at a UE having multiple subscriptions.
[0019] FIG. 9 depicts a process flow for applying de-prioritization at a UE having multiple subscriptions.
[0020] FIG. 10 depicts a method for wireless communications.
[0021] FIG. 11 depicts aspects of an example communications device.DETAILED DESCRIPTION
[0022] Aspects of the present disclosure provide apparatuses, methods, processing systems, and computer-readable mediums for sharing cell-level information among multiple subscriptions of a wireless communications device.
[0023] In certain wireless communications systems (e.g., Evolved Universal Terrestrial Radio Access (E-UTRA) , 5G New Radio (NR) , and / or any future wireless communications system) , a user equipment (UE) may support multiple subscriptions (e.g., via multiple subscriber identity modules (SIMs) or universal SIMs (USIMs) ) to communicate with one or more wireless networks. A UE with multi-subscription capabilities (e.g., multiple SIMs) may be able to access various services or features associated with each of the subscriptions, such as different subscriber accounts (e.g., for personal or business communications) , different coverage areas, different radio access networks, and / or different radio access technologies (RATs) (e.g., E-UTRA and 5G NR) . As an example, a UE with multi-subscription capabilities may have a subscription for business communications and another subscription for personal communications. In some cases, a UE with multi-subscription capabilities may have a subscription that enables access to a network with a different coverage area than the coverage area associated with another subscription. In certain cases, a UE with multi-subscription capabilities may be configured to communicate via the multiple subscriptions concurrently, such as Dual SIM Dual Active (DSDA) . In some cases, a UE with multi-subscription capabilities may be configured to communicate via a single subscription at a time, such as Dual SIM Single Standby (DSSS) , Dual SIM Dual Standby (DSDS) , Triple SIM Triple Standby (TSTS) , etc.
[0024] Technical problems for multi-subscription communications include, for example, efficiently communicating with the same cell via multiple subscriptions. In some cases, a UE may communicate via multiple subscriptions on the same cell of a network entity, for example, in a DSDA mode or DSSS mode. As further described herein, a cell may correspond to a specific carrier frequency and / or coverage area of a network entity providing coverage to one or more UEs, such as a base station or component of a base station (e.g., transmission-reception point (TRP) ) providing coverage to one or more UEs. The network entity may configure the UE with certain cell-level information, such as timers and / or constants used for radio connection controls. As an example, the network entity may configure the UE with certain parameters (e.g., timers and / or thresholds) used for detecting radio link failure associated with a cell. The UE may handle the detection of radio link failure separately for each subscription despite a scenario where the UE is communicating with the same cell via the subscriptions. For example, even if the UE detects a radio link failure on a cell for a first subscription, the UE may perform the same radio link detection operations in order to declare radio link failure on the same cell for a second subscription. Such separate handling of cell-level information among subscriptions may cause delays in communications (e.g., a delay in radio link failure detection) .
[0025] Aspects described herein overcome the aforementioned technical problem (s) by sharing cell-level information among multiple subscriptions of a UE. In certain aspects, a UE may consider certain cell-level information associated with a first subscription while communicating via a second subscription, or vice versa. The cell-level information may include one or more parameters for performance of one or more connection control procedures, such as radio link failure detection, cell selection, and / or de-prioritization of a cell, frequency, and / or RAT. The cell-level information may include one or more thresholds, one or more counters, one or more timers, or one or more constants used in the connection control procedures. In certain aspects, the UE may consider the cell-level information associated with multiple subscriptions in order to trigger or perform cell (re) selection, for example, as described herein with respect to FIG. 7. In certain aspects, the UE may consider the cell-level information associated with multiple subscriptions in order to trigger or perform radio link failure detection, for example, as described herein with respect to FIG. 8. In certain aspects, the UE may consider the cell-level information associated with multiple subscriptions in order to perform or apply de-prioritization of a frequency and / or RAT, for example, as described herein with respect to FIG. 9.
[0026] The techniques for sharing cell-level information among multiple subscriptions described herein may provide various beneficial effects and / or advantages. The techniques for sharing cell-level information may enable improved wireless communication performance, such as reduced latency, improved channel usage, and / or improved power consumption for wireless communications. As an example, the shared cell-level information may reduce the latency in triggering cell (re) selection and / or applying certain offsets to cell selection criterion. The shared cell-level information may reduce the latency in detecting a radio link failure associated with a cell. The shared cell-level information may reduce the latency in identifying a network-triggered de-prioritization associated with a frequency and / or RAT. Such reductions in latencies may enable a UE to reduce the latency involved in communicating with a network entity. In certain aspects, the shared cell-level information may reduce the channel usage and / or power consumption at the UE. For example, the shared cell-level information may allow the UE to perform certain radio connection control operations without redundant operations performed for each subscription in terms of transmission (s) and / or evaluating certain radio connection controls (e.g., triggering cell selection, cell selection criterion, radio link failure detection, and / or de-prioritization) .
[0027] Introduction to Wireless Communications Networks
[0028] The techniques and methods described herein may be used for various wireless communications networks. While aspects may be described herein using terminology commonly associated with 3G, 4G, 5G, 6G, and / or other generations of wireless technologies, aspects of the present disclosure may likewise be applicable to other communications systems and standards not explicitly mentioned herein.
[0029] FIG. 1 depicts an example of a wireless communications network 100, in which aspects described herein may be implemented.
[0030] Generally, wireless communications network 100 includes various network entities (alternatively, network elements or network nodes) . A network entity is generally a communications device and / or a communications function performed by a communications device (e.g., a user equipment (UE) , a base station (BS) , a component of a BS, a server, etc. ) . As such communications devices are part of wireless communications network 100, and facilitate wireless communications, such communications devices may be referred to as wireless communications devices. For example, various functions of a network as well as various devices associated with and interacting with a network may be considered network entities. Further, wireless communications network 100 includes terrestrial aspects, such as ground-based network entities (e.g., BSs 102) , and non-terrestrial aspects (also referred to herein as non-terrestrial network entities) , such as satellite 140 and / or aerial or spaceborne platform (s) , which may include network entities on-board (e.g., one or more BSs) capable of communicating with other network elements (e.g., terrestrial BSs) and UEs.
[0031] In the depicted example, wireless communications network 100 includes B Ss 102, UEs 104, and one or more core networks, such as an Evolved Packet Core (EPC) 160 and 5G Core (5GC) network 190, which interoperate to provide communications services over various communications links, including wired and wireless links.
[0032] FIG. 1 depicts various example UEs 104, which may more generally include: a cellular phone, smart phone, session initiation protocol (SIP) phone, laptop, personal digital assistant (PDA) , satellite radio, global positioning system, multimedia device, video device, digital audio player, camera, game console, tablet, smart device, wearable device, vehicle, electric meter, gas pump, large or small kitchen appliance, healthcare device, implant, sensor / actuator, display, internet of things (IoT) devices, always on (AON) devices, edge processing devices, data centers, or other similar devices. UEs 104 may also be referred to more generally as a mobile device, a wireless device, a station, a mobile station, a subscriber station, a mobile subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a remote device, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, and others.
[0033] BSs 102 wirelessly communicate with (e.g., transmit signals to or receive signals from) UEs 104 via communications links 120. The communications links 120 between BSs 102 and UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a BS 102 and / or downlink (DL) (also referred to as forward link) transmissions from a BS 102 to a UE 104. The communications links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity in various aspects.
[0034] BSs 102 may generally include: a NodeB, enhanced NodeB (eNB) , next generation enhanced NodeB (ng-eNB) , next generation NodeB (gNB or gNodeB) , access point, base transceiver station, radio base station, radio transceiver, transceiver function, transmission reception point, and / or others. Each of BSs 102 may provide communications coverage for a respective coverage area 110, which may sometimes be referred to as a cell, and which may overlap in some cases (e.g., small cell 102’ may have a coverage area 110’ that overlaps the coverage area 110 ora macro cell) . A BS may, for example, provide communications coverage for a macro cell (covering relatively large geographic area) , a pico cell (covering relatively smaller geographic area, such as a sports stadium) , a femto cell (relatively smaller geographic area (e.g., a home) ) , and / or other types of cells.
[0035] Generally, a cell may refer to a portion, partition, or segment of wireless communication coverage served by a network entity within a wireless communication network. A cell may have geographic characteristics, such as a geographic coverage area, as well as radio frequency characteristics, such as time and / or frequency resources dedicated to the cell. For example, a specific geographic coverage area may be covered by multiple cells employing different frequency resources (e.g., bandwidth parts) and / or different time resources. As another example, a specific geographic coverage area may be covered by a single cell. In some contexts (e.g., a carrier aggregation scenario and / or multi-connectivity scenario) , the terms “cell” or “serving cell” may refer to or correspond to a specific carrier frequency (e.g., a component carrier) used for wireless communications, and a “cell group” may refer to or correspond to multiple carriers used for wireless communications. As examples, in a carrier aggregation scenario, a UE may communicate on multiple component carriers corresponding to multiple (serving) cells in the same cell group, and in a multi-connectivity (e.g., dual connectivity) scenario, a UE may communicate on multiple component carriers corresponding to multiple cell groups.
[0036] While BSs 102 are depicted in various aspects as unitary communications devices, BSs 102 may be implemented in various configurations. For example, one or more components of a base station may be disaggregated, including a central unit (CU) , one or more distributed units (DUs) , one or more radio units (RUs) , a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , or a Non-Real Time (Non-RT) RIC, to name a few examples. In another example, various aspects of a base station may be virtualized. More generally, a base station (e.g., BS 102) may include components that are located at a single physical location or components located at various physical locations. In examples in which a base station includes components that are located at various physical locations, the various components may each perform functions such that, collectively, the various components achieve functionality that is similar to a base station that is located at a single physical location. In some aspects, a base station including components that are located at various physical locations may be referred to as a disaggregated radio access network architecture, such as an Open RAN (O-RAN) or Virtualized RAN (VRAN) architecture. FIG. 2 depicts and describes an example disaggregated base station architecture.
[0037] Different BSs 102 within wireless communications network 100 may also be configured to support different radio access technologies, such as 3G, 4G, and / or 5G. For example, BSs 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) ) may interface with the EPC 160 through first backhaul links 132 (e.g., an S1 interface) . BSs 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN) ) may interface with 5GC 190 through second backhaul links 184. BSs 102 may communicate directly or indirectly (e.g., through the EPC 160 or 5GC 190) with each other over third backhaul links 134 (e.g., X2 interface) , which may be wired or wireless.
[0038] Wireless communications network 100 may subdivide the electromagnetic spectrum into various classes, bands, channels, or other features. In some aspects, the subdivision is provided based on wavelength and frequency, where frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, or a subband. For example, 3GPP currently defines Frequency Range 1 (FR1) as including 410 MHz -7125 MHz, which is often referred to (interchangeably) as “Sub-6 GHz” . Similarly, 3GPP currently defines Frequency Range 2 (FR2) as including 24,250 MHz -71,000 MHz, which is sometimes referred to (interchangeably) as a “millimeter wave” ( “mmW” or “mmWave” ) . In some cases, FR2 may be further defined in terms of sub-ranges, such as a first sub-range FR2-1 including 24,250 MHz -52,600 MHz and a second sub-range FR2-2 including 52,600 MHz -71,000 MHz. A base station configured to communicate using mmWave / near mmWave radio frequency bands (e.g., a mmWave base station such as BS 180) may utilize beamforming (e.g., 182) with a UE (e.g., 104) to improve path loss and range.
[0039] The communications links 120 between BSs 102 and, for example, UEs 104, may be through one or more carriers, which may have different bandwidths (e.g., 5, 10, 15, 20, 100, 400, and / or other MHz) , and which may be aggregated in various aspects. Carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) .
[0040] Communications using higher frequency bands may have higher path loss and a shorter range compared to lower frequency communications. Accordingly, certain base stations (e.g., 180 in FIG. 1) may utilize beamforming 182 with a UE 104 to improve path loss and range. For example, BS 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate the beamforming. In some cases, BS 180 may transmit a beamformed signal to UE 104 in one or more transmit directions 182’ . UE 104 may receive the beamformed signal from the BS 180 in one or more receive directions 182” . UE 104 may also transmit a beamformed signal to the BS 180 in one or more transmit directions 182” . BS 180 may also receive the beamformed signal from UE 104 in one or more receive directions 182’ . BS 180 and UE 104 may then perform beam training to determine the best receive and transmit directions for each of BS 180 and UE 104. Notably, the transmit and receive directions for BS 180 may or may not be the same. Similarly, the transmit and receive directions for UE 104 may or may not be the same.
[0041] Wireless communications network 100 further includes a Wi-Fi AP 150 in communication with Wi-Fi stations (STAs) 152 via communications links 154 in, for example, a 2.4 GHz and / or 5 GHz unlicensed frequency spectrum.
[0042] Certain UEs 104 may communicate with each other using device-to-device (D2D) communications link 158. D2D communications link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and / or a physical sidelink feedback channel (PSFCH) .
[0043] EPC 160 may include various functional components, including: a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and / or a Packet Data Network (PDN) Gateway 172, such as in the depicted example. MME 162 may be in communication with a Home Subscriber Server (HSS) 174. MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160. Generally, MME 162 provides bearer and connection management.
[0044] Generally, user Internet protocol (IP) packets are transferred through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation as well as other functions. PDN Gateway 172 and the BM-SC 170 are connected to IP Services 176, which may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a Packet Switched (PS) streaming service, and / or other IP services.
[0045] BM-SC 170 may provide functions for MBMS user service provisioning and delivery. BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and / or may be used to schedule MBMS transmissions. MBMS Gateway 168 may be used to distribute MBMS traffic to the BSs 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and / or may be responsible for session management (start / stop) and for collecting eMBMS related charging information.
[0046] 5GC 190 may include various functional components, including: an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. AMF 192 may be in communication with Unified Data Management (UDM) 196.
[0047] AMF 192 is a control node that processes signaling between UEs 104 and 5GC 190. AMF 192 provides, for example, quality of service (QoS) flow and session management.
[0048] Internet protocol (IP) packets are transferred through UPF 195, which is connected to the IP Services 197, and which provides UE IP address allocation as well as other functions for 5GC 190. IP Services 197 may include, for example, the Internet, an intranet, an IMS, a PS streaming service, and / or other IP services.
[0049] In various aspects, a network entity or network node can be implemented as an aggregated base station, as a disaggregated base station, a component ora base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, to name a few examples.
[0050] FIG. 2 depicts an example disaggregated base station 200 architecture. The disaggregated base station 200 architecture may include one or more central units (CUs) 210 that can communicate directly with a core network 220 via a backhaul link, or indirectly with the core network 220 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 225 via an E2 link, or a Non-Real Time (Non-RT) RIC 215 associated with a Service Management and Orchestration (SMO) Framework 205, or both) . A CU 210 may communicate with one or more distributed units (DUs) 230 via respective midhaul links, such as an Fl interface. The DUs 230 may communicate with one or more radio units (RUs) 240 via respective fronthaul links. The RUs 240 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, the UE 104 may be simultaneously served by multiple RUs 240.
[0051] Each of the units, e.g., the CUs 210, the DUs 230, the RUs 240, as well as the Near-RT RICs 225, the Non-RT RICs 215 and the SMO Framework 205, may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communications interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units. Additionally or alternatively, the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
[0052] In some aspects, the CU 210 may host one or more higher layer control functions. Such control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 210. The CU 210 may be configured to handle user plane functionality (e.g., Central Unit -User Plane (CU-UP) ) , control plane functionality (e.g., Central Unit -Control Plane (CU-CP) ) , or a combination thereof. In some implementations, the CU 210 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the El interface when implemented in an O-RAN configuration. The CU 210 can be implemented to communicate with the DU 230, as necessary, for network control and signaling.
[0053] The DU 230 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 240. In some aspects, the DU 230 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3rd Generation Partnership Project (3GPP) . In some aspects, the DU 230 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 230, or with the control functions hosted by the CU 210.
[0054] Lower-layer functionality can be implemented by one or more RUs 240. In some deployments, an RU 240, controlled by a DU 230, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU (s) 240 can be implemented to handle over the air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control and user plane communications with the RU (s) 240 can be controlled by the corresponding DU 230. In some scenarios, this configuration can enable the DU (s) 230 and the CU 210 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0055] The SMO Framework 205 may be configured to support RAN deployment and provisioning ofnon-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 205 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O 1 interface) . For virtualized network elements, the SMO Framework 205 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 290) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an 02 interface) . Such virtualized network elements can include, but are not limited to, CUs 210, DUs 230, RUs 240 and Near-RT RICs 225. In some implementations, the SMO Framework 205 can communicate with a hardware aspect ofa 4G RAN, such as an open eNB (O-eNB) 211, via an O1 interface. Additionally, in some implementations, the SMO Framework 205 can communicate directly with one or more DUs 230 and / or one or more RUs 240 via an O1 interface. The SMO Framework 205 also may include a Non-RT RIC 215 configured to support functionality of the SMO Framework 205.
[0056] The Non-RT RIC 215 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence / Machine Learning (AI / ML) workflows including model training and updates, or policy-based guidance of applications / features in the Near-RT RIC 225. The Non-RT RIC 215 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 225. The Near-RT RIC 225 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 210, one or more DUs 230, or both, as well as an O-eNB, with the Near-RT RIC 225.
[0057] In some implementations, to generate AI / ML models to be deployed in the Near-RT RIC 225, the Non-RT RIC 215 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 225 and may be received at the SMO Framework 205 or the Non-RT RIC 215 from non-network data sources or from network functions. In some examples, the Non-RT RIC 215 or the Near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 215 may monitor long-term trends and patterns for performance and employ AI / ML models to perform corrective actions through the SMO Framework 205 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
[0058] FIG. 3 depicts aspects of an example B S 102 and a UE 104.
[0059] Generally, BS 102 includes various processors (e.g., 318, 320, 330, 338, and 340) , antennas 334a-t (collectively 334) , transceivers 332a-t (collectively 332) , which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., data source 312) and wireless reception of data (e.g., data sink 314) . For example, BS 102 may send and receive data between BS 102 and UE 104. BS 102 includes controller / processor 340, which may be configured to implement various functions described herein related to wireless communications. Note that the BS 102 may have a disaggregated architecture as described herein with respect to FIG. 2.
[0060] Generally, UE 104 includes various processors (e.g., 358, 364, 366, 370, and 380) , antennas 352a-r (collectively 352) , transceivers 354a-r (collectively 354) , which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., retrieved from data source 362) and wireless reception of data (e.g., provided to data sink 360) . UE 104 includes controller / processor 380, which may be configured to implement various functions described herein related to wireless communications.
[0061] In regards to an example downlink transmission, BS 102 includes a transmit processor 320 that may receive data from a data source 312 and control information from a controller / processor 340. The control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , and / or others. The data may be for the physical downlink shared channel (PDSCH) , in some examples.
[0062] Transmit processor 320 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Transmit processor 320 may also generate reference symbols, such as for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , PBCH demodulation reference signal (DMRS) , and channel state information reference signal (CSI-RS) .
[0063] Transmit (TX) multiple-input multiple-output (MIMO) processor 330 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and / or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers 332a-332t. Each modulator in transceivers 332a-332t may process a respective output symbol stream to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from the modulators in transceivers 332a-332t may be transmitted via the antennas 334a-334t, respectively.
[0064] In order to receive the downlink transmission, UE 104 includes antennas 352a-352r that may receive the downlink signals from the BS 102 and may provide received signals to the demodulators (DEMODs) in transceivers 354a-354r, respectively. Each demodulator in transceivers 354a-354r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples to obtain received symbols.
[0065] RX MIMO detector 356 may obtain received symbols from all the demodulators in transceivers 354a-354r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. Receive processor 358 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 104 to a data sink 360, and provide decoded control information to a controller / processor 380.
[0066] In regards to an example uplink transmission, UE 104 further includes a transmit processor 364 that may receive and process data (e.g., for the PUSCH) from a data source 362 and control information (e.g., for the physical uplink control channel (PUCCH) ) from the controller / processor 380. Transmit processor 364 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) . The symbols from the transmit processor 364 may be precoded by a TX MIMO processor 366 if applicable, further processed by the modulators in transceivers 354a-354r (e.g., for SC-FDM) , and transmitted to BS 102.
[0067] At BS 102, the uplink signals from UE 104 may be received by antennas 334a-t, processed by the demodulators in transceivers 332a-332t, detected by a RX MIMO detector 336 if applicable, and further processed by a receive processor 338 to obtain decoded data and control information sent by UE 104. Receive processor 338 may provide the decoded data to a data sink 314 and the decoded control information to the controller / processor 340.
[0068] Memories 342 and 382 may store data and program codes for BS 102 and UE 104, respectively.
[0069] Scheduler 344 may schedule UEs for data transmission on the downlink and / or uplink.
[0070] In various aspects, BS 102 may be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, “transmitting” may refer to various mechanisms of outputting data, such as outputting data from data source 312, scheduler 344, memory 342, transmit processor 320, controller / processor 340, TX MIMO processor 330, transceivers 332a-t, antenna 334a-t, and / or other aspects described herein. Similarly, “receiving” may refer to various mechanisms of obtaining data, such as obtaining data from antennas 334a-t, transceivers 332a-t, RX MIMO detector 336, controller / processor 340, receive processor 338, scheduler 344, memory 342, and / or other aspects described herein.
[0071] In various aspects, UE 104 may likewise be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, “transmitting” may refer to various mechanisms of outputting data, such as outputting data from data source 362, memory 382, transmit processor 364, controller / processor 380, TX MIMO processor 366, transceivers 354a-t, antenna 352a-t, and / or other aspects described herein. Similarly, “receiving” may refer to various mechanisms of obtaining data, such as obtaining data from antennas 352a-t, transceivers 354a-t, RX MIMO detector 356, controller / processor 380, receive processor 358, memory 382, and / or other aspects described herein.
[0072] In some aspects, a processor may be configured to perform various operations, such as those associated with the methods described herein, and transmit (output) to or receive (obtain) data from another interface that is configured to transmit or receive, respectively, the data.
[0073] In various aspects, artificial intelligence (AI) processors 318 and 370 may perform AI processing for BS 102 and / or UE 104, respectively. The AI processor 318 may include AI accelerator hardware or circuitry such as one or more neural processing units (NPUs) , one or more neural network processors, one or more tensor processors, one or more deep learning processors, etc. The AI processor 370 may likewise include AI accelerator hardware or circuitry. As an example, the AI processor 370 may perform AI-based beam management, AI-based channel state feedback (CSF) , AI-based antenna tuning, and / or AI-based positioning (e.g., non-line of sight positioning prediction) . In some cases, the AI processor 318 may process feedback from the UE 104 (e.g., CSF) using hardware accelerated AI inferences and / or AI training. The AI processor 318 may decode compressed CSF from the UE 104, for example, using a hardware accelerated AI inference associated with the CSF. In certain cases, the AI processor 318 may perform certain RAN-based functions including, for example, network planning, network performance management, energy-efficient network operations, etc.
[0074] FIGS. 4A, 4B, 4C, and 4D depict aspects of data structures for a wireless communications network, such as wireless communications network 100 of FIG. 1.
[0075] In particular, FIG. 4A is a diagram 400 illustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure, FIG. 4B is a diagram 430 illustrating an example of DL channels within a 5G subframe, FIG. 4C is a diagram 450 illustrating an example of a second subframe within a 5G frame structure, and FIG. 4D is a diagram 480 illustrating an example of UL channels within a 5G subframe.
[0076] Wireless communications systems may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. Such systems may also support half-duplex operation using time division duplexing (TDD) . OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth (e.g., as depicted in FIGS. 4B and 4D) into multiple orthogonal subcarriers. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and / or in the time domain with SC-FDM.
[0077] A wireless communications frame structure may be frequency division duplex (FDD) , in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for either DL or UL. Wireless communications frame structures may also be time division duplex (TDD) , in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for both DL and UL.
[0078] In FIG. 4A and 4C, the wireless communications frame structure is TDD where D is DL, U is UL, and X is flexible for use between DL / UL. UEs may be configured with a slot format through a received slot format indicator (SFI) (dynamically through DL control information (DCI) , or semi-statically / statically through radio resource control (RRC) signaling) . In the depicted examples, a 10 ms frame is divided into 10 equally sized 1 ms subframes. Each subframe may include one or more time slots. In some examples, each slot may include 12 or 14 symbols, depending on the cyclic prefix (CP) type (e.g., 12 symbols per slot for an extended CP or 14 symbols per slot for a normal CP) . Subframes may also include mini-slots, which generally have fewer symbols than an entire slot. Other wireless communications technologies may have a different frame structure and / or different channels.
[0079] In certain aspects, the number of slots within a subframe (e.g., a slot duration in a subframe) is based on a numerology, which may define a frequency domain subcarrier spacing and symbol duration as further described herein. In certain aspects, given a numerology μ, there are 2μ slots per subframe. Thus, numerologies (μt) 0 to 6 may allow for 1, 2, 4, 8, 16, 32, and 64 slots, respectively, per subframe. In some cases, the extended CP (e.g., 12 symbols per slot) may be used with a specific numerology, e.g., numerology 2 allowing for 4 slots per subframe. The subcarrier spacing and symbol length / duration are a function of the numerology. The subcarrier spacing may be equal to 2μ × 15 kHz, where μ is the numerology 0 to 6. As an example, the numerology μt = 0 corresponds to a subcarrier spacing of 15 kHz, and the numerology g = 6 corresponds to a subcarrier spacing of 960 kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIGS. 4A, 4B, 4C, and 4D provide an example of a slot format having 14 symbols per slot (e.g., a normal CP) and a numerology μ = 2 with 4 slots per subframe. In such a case, the slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.
[0080] As depicted in FIGS. 4A, 4B, 4C, and 4D, a resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends, for example, 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme including, for example, quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM) .
[0081] As illustrated in FIG. 4A, some of the REs carry reference (pilot) signals (RS) for a UE (e.g., UE 104 of FIGS. 1 and 3) . The RS may include demodulation RS (DMRS) and / or channel state information reference signals (CSI-RS) for channel estimation at the UE.The RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and / or phase tracking RS (PT-RS) .
[0082] FIG. 4B illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) , each CCE including, for example, nine RE groups (REGs) , each REG including, for example, four consecutive REs in an OFDM symbol.
[0083] A primary synchronization signal (PSS) may be within symbol 2 of particular subframes ora frame. The PSS is used by a UE (e.g., 104 of FIGS. 1 and 3) to determine subframe / symbol timing and a physical layer identity.
[0084] A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.
[0085] Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DMRS. The physical broadcast channel (PBCH) , which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (SSB) , and in some cases, referred to as a synchronization signal block (SSB) . The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) . The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and / or paging messages.
[0086] As illustrated in FIG. 4C, some of the REs carry DMRS (indicated as R for one particular configuration, but other DMRS configurations are possible) for channel estimation at the base station. The UE may transmit DMRS for the PUCCH and DMRS for the PUSCH. The PUSCH DMRS may be transmitted, for example, in the first one or two symbols of the PUSCH. The PUCCH DMRS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. UE 104 may transmit sounding reference signals (SRS) . The SRS may be transmitted, for example, in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
[0087] FIG. 4D illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and HARQ ACK / NACK feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and / or UCI.
[0088] Aspects Related to Sharing Cell-level Information for Multiple Subscriptions
[0089] Aspects of the present disclosure provide techniques for sharing cell-level information among multiple subscriptions of a UE. In certain aspects, a UE may consider certain cell-level information associated with a first subscription while communicating via a second subscription, or vice versa. As examples, cell-level information may be shared for cell selection operations, radio link failure detection, and / or prioritization operations.
[0090] FIG. 5 illustrates an example wireless communications system 500 where a UE 504 has multiple subscriptions in communication with a network entity 502. In this example, the UE 504 is capable of communicating with the network entity 502 via a first subscription 506 and a second subscription 508, for example, in DSSS mode or DSDA mode. The UE 504 may be in communication with the network entity 502 via the same first cell 510a on the first subscription 506 and the second subscription 508. In certain aspects, the first cell 510a may correspond to a geographic coverage area and / or carrier frequency for wireless communications of the network entity 502. In certain aspects, a second cell 510b may be available for communications between the network entity 502 and the UE 504. In this example, the second cell 510b may correspond to a different carrier frequency and / or geographic coverage area of the network entity 502 with respect to the first cell 510a. Note that the second cell 51 0b may be served by a different network entity in some cases. Accordingly, the first subscription 506 and the second subscription 508 may encounter the same or similar channel conditions (e.g., interference, noise, fading, scattering, etc. ) , channel usage, network congestion, etc. in communicating with the network entity 502 via the first cell 510a and / or the second cell 510b.
[0091] FIG. 6 illustrates an example architecture 600 for sharing cell-level information among multiple subscriptions of a UE, for example, as described herein with respect to FIG. 5. In this example, a first subscription 602 and a second subscription 604 of a UE may have access to common cell-level information 606 stored at the UE. The UE holding the first subscription 602 and the second subscription 604 has access to the common cell-level information 606, and the UE may use the common cell-level information 606 while communicating via the first subscription 602 and / or the second subscription 604.
[0092] The common cell-level information 606 may include first information 608 and second information 610. The first information 608 may be representative of the cell-level information associated with the first subscription 602, and the second information may be representative of the cell-level information associated with the second subscription 604. The UE may share the common cell-level information 606 among the first subscription 602 and the second subscription 604 for certain radio connection control operations. The common cell-level information 606 may include threshold (s) , counter (s) , timer (s) , and / or constant (s) associated with radio connection control operations.
[0093] As an example, for cell selection, the common cell-level information 606 may include the total number of failed attempts to establish a connection via a cell among the first subscription 602 and the second subscription 604. For radio link failure detection, the common cell-level information 606 may include counters and constants N310 and N311 that represent the total number of consecutive out-of-sync indications and the total number of in-sync indications, respectively, among the first subscription 602 and the second subscription 604. For frequency and / or RAT de-prioritization, the common cell-level information 606 may include an indication that a frequency and / or RAT is de-prioritized for a certain duration of time.
[0094] Example Operations of Cell Selection with Shared Cell-level Information
[0095] FIG. 7 depicts a process flow 700 for cell selection in a system including a network entity 702 and a UE 704 having a first subscription 706a and a second subscription 706b. In some aspects, the network entity 702 may be an example of the BS 102 depicted and described with respect to FIG. 1 and 3 or a disaggregated base station depicted and described with respect to FIG. 2. Similarly, the UE 704 may be an example ofUE 104 depicted and described with respect to FIG. 1 and 3. However, in other aspects, UE 704 may be another type of wireless communications device and network entity 702 may be another type of network entity or network node, such as those described herein. Note that any operations or signaling illustrated with dashed lines indicates that that operation or signaling may be an optional or alternative example.
[0096] At 708, the UE 704 sends a request to establish a connection with the network entity 702 (e.g., an RRC connection setup request) via the first subscription 706a in a first cell (e.g., the first cell 510a) . For example, the RRC connection setup request (e.g., RRCSetupRequest) may include an indication of a UE identity that is unique to or corresponds to the first subscription 706a. When the UE 704 does not receive a response from the network entity 702 after a certain duration, the UE 704 may treat the transmission of the request as a connection attempt failure. For example, the UE 704 starts the timer T300 in response to sending the request to establish the connection. Upon expiration of the timer T300 without a response from the network entity, the UE 704 may increment a first counter for connection establishment failures associated with the first subscription 706a. The first counter may be included in common cell-level information (e.g., the common-level information 606) shared between the first subscription 706a and the second subscription 706b.
[0097] At 710, the UE 704 sends a request to establish a connection with the network entity 702 via the second subscription 706b in the first cell. Here too, the RRC connection setup request may include an indication of a UE identity that is unique to or corresponds to the second subscription 706b. The UE 704 starts the time T300 in response to sending the request to establish the connection. Upon expiration of the timer T300, the UE 704 may increment a counter for connection establishment failures associated with the second subscription 706b. The second counter may be included in common cell-level information (e.g., the connnon-level information 606) shared between the first subscription 706a and the second subscription 706b.
[0098] At 712, the UE 704 tracks connection establishment failures based on at least in part common-cell level information including the first counter and the second counter. For example, the UE 704 may treat the sum of the first counter and the second counter as the total number of connection establishment failures. The UE 704 may be configured with parameters for connection establishment failure control, for example, via RRC signaling. The connection establishment failure control parameters may include connEstFailCount, connEstFailOffset, and connEstFailOffsetValidity, connEstFailCount is the number of times that the UE detects T300 expiry on the same cell before applying connEstFailOffset, connEstFailOffset is the value for the parameter Qoffsettemp as further described below in the criterion for cell selection, connEstFailOffsetValidity is the amount of time that the UE applies connEstFailOffset before removing the offset from evaluation of the cell.
[0099] At 714, if the T300 has expired a consecutive connEstFailCount (which may be a threshold configured via system information) times on the same cell (e.g., the first cell) via the first subscription 706a and / or the second subscription 706b, the UE 704 uses connEstFailOffset for the parameter Qoffsettemp for the concerned cell when performing cell selection and reselection, for a period as indicated by connEstFailOffsetValidity. In some cases, the UE 704 may use connEstFailOffset when each of the first counter and the second counter meet a threshold (e.g., 0 or >=1) in addition to the total number of connection establishment failures meeting the connEstFailCount threshold. Effectively, Qoffsettemp may make the selection criterion more stringent for the cell in which Qoffsettemp is activated. In certain cases, Qoffsettemp may be set to infinity.
[0100] As an example, cell selection criterion S may be fulfilled when:
[0101] Srxlev > 0 AND Squal > 0
[0102] where: Srxlev = Qrxlevmeas - (Qrxlevmin + Qrxlevminoffset) -Pcompensation-Qoffsettemp Squal = Qqualmeas - (Qqualmin + Qqualminoffset) -Qoffsettemp
[0103] where Srxlev is the cell selection received signal level value (dB) corresponding to a given cell; Squal is the cell selection received signal quality value (dB) corresponding to the cell; Qoffsettemp is the offset temporarily applied to a cell, for example, as triggered by connEstFailCount; Qrxlevmeas is the measured cell received signal power value (RSRP) ; Qqualraeas is the measured cell signal quality value (RSRQ) ; Qrxlevmin is the minimum received signal level in the cell (dBm) ; Qqualmin is the minimum quality level in the cell (dB) ; Qrxlevminoffset is an offset to the signalled Qrxlevmin (for example, used to search for a PLMN when camped on a visited PLMN (VPLMN) ) ; and Qqualminoffset is an offset to the signalled Qqualmin (for example, used to search for a PLMN when camped on a VPLMN) .
[0104] At 716, the UE 704 sends, to the network entity 702, a request to establish a connection with the network entity 702 via the second subscription 706b in a second cell (e.g., the second cell 510b) . Due to the Qoffsettemp being applied, the cell selection criterion for the first cell may not be fulfilled; and the UE 704 may select the second cell to attempt connection establishment. Accordingly, the common-cell level information may reduce the latency in applying the Qoffsettemp across multiple subscriptions to a cell experiencing failed connection attempts, which may be encountered via one or more subscriptions.
[0105] Example Operations of Radio Link Failure Detection with Shared Cell-level Information
[0106] FIG. 8 depicts a process flow 800 for radio link failure detection in a system including a network entity 802 and a UE 804 having a first subscription 806a and a second subscription 806b. In some aspects, the network entity 802 may be an example of the BS 102 depicted and described with respect to FIG. 1 and 3 or a disaggregated base station depicted and described with respect to FIG. 2. Similarly, the UE 804 may be an example ofUE 104 depicted and described with respect to FIG. 1 and 3. However, in other aspects, UE 804 may be another type of wireless communications device and network entity 802 may be another type of network entity or network node, such as those described herein. Note that any operations or signaling illustrated with dashed lines indicates that that operation or signaling may be an optional or alternative example.
[0107] At 808, the UE 804 communicates with the network entity 802 via the first subscription 806a and / or the second subscription 806b in a first cell (e.g., the first cell 510a) . In certain aspects, the UE 804 tracks certain counters and / or thresholds for radio link failure monitoring / detection associated with the first subscription 806a and / or the second subscription 806b based at least in part on common cell-level information. For example, the common cell-level information may include a separate counter of out-of- sync indications for each of the first subscription 806a and the second subscription 806b. The common cell-level information may also include a separate counter of in-sync indications for each of the first subscription 806a and the second subscription 806b.
[0108] As an example, the UE 804 monitors the downlink radio link quality based on a reference signal (e.g., a radio link monitoring reference signal (RLM-RS) ) . On each RLM-RS resource, the UE 804 estimates the downlink radio link quality and compares it to the thresholds Qout (out-of-sync threshold) and Qin (in-sync threshold) for the purpose of monitoring downlink radio link quality of a cell. The threshold Qout may be defined as the level at which the downlink radio link cannot be reliably received and correspond to an out-of-sync block error rate (BLERout) . For example, BLERout may be 10 percent. When the downlink BLER is equal to or greater than Qout, the UE 804 may generate an out-of-sync indication. The threshold Qin may be defined as the level at which the downlink radio link quality can be received with significantly higher reliability than at Qout and correspond to an in-sync block error rate (BLERin) . For example, BLERin may be 2 percent. When the downlink BLER is less than or equal to Qin, the UE 804 may generate an in-sync indication.
[0109] At 810, upon receiving N310 (e.g., out-of-sync indication threshold, where N310 is a constant that defines the maximum number of consecutive out-of-sync indications for a particular cell) consecutive out-of-sync indications (from the physical layer of the UE 804) for communications via the first subscription 806a and / or the second subscription 806b on the first cell, the UE 804 starts timer T310 for the corresponding cell. The UE 804 may start the timer T310 based at least in part on the common cell-level information, which includes the subscription-specific counters for out-of-sync indications. The consecutive out-of-sync indications may be generated based on the downlink radio link quality monitored for the first subscription 806a and / or the second subscription 806b.
[0110] At 812, upon receiving N311 (e.g., in-sync indication threshold, where N311 is a constant that defines the maximum number of consecutive in-sync indications for a particular cell) consecutive in-sync indications (from the physical layer) for the first cell while T310 is running, the UE 804 stops timer T310 for the corresponding cell. The UE 804 may stop the timer T310 based at least in part on the common cell-level information, which includes the subscription-specific counters for in-sync indications. The consecutive in-sync indications may be generated based on the downlink radio link quality monitored for the first subscription 806a and / or the second subscription 806b.
[0111] At 814, the UE 804 detects radio link failure due to expiration of the timer T310.
[0112] At 816, in response to radio link failure being detected, the UE 804 performs cell reselection. In this example, the UE 804 sends a request to establish a connection with the network entity 802 via a second cell (e.g., the second cell 510b) on the second subscription 806b. Accordingly, the common cell-level information may enable the UE 804 to reduce the latency to detect radio link failure across the first subscription 806a and second subscription 806b and reestablish a wireless communication link with a network entity.
[0113] Example Operations of De-Prioritization with Shared Cell-level Information
[0114] FIG. 9 depicts a process flow 900 for de-prioritization in a system including a network entity 902 and a UE 904 having a first subscription 906a and a second subscription 906b. In some aspects, the network entity 902 may be an example of the BS 102 depicted and described with respect to FIG. 1 and 3 or a disaggregated base station depicted and described with respect to FIG. 2. Similarly, the UE 904 may be an example ofUE 104 depicted and described with respect to FIG. 1 and 3. However, in other aspects, UE 904 may be another type of wireless communications device and network entity 902 may be another type of network entity or network node, such as those described herein.
[0115] At 908, the UE 904 obtains, from the network entity 902 via the first subscription 906a, an indication that a carrier frequency and / or RAT is de-prioritized. A de-prioritized carrier frequency and / or RAT may indicate to the UE 904 to refrain from communicating via that carrier frequency and / or RAT for a certain duration. For example, the traffic on the carrier frequency and / or via the RAT may be at capacity or overloaded, and in order to reduce the traffic on the carrier frequency or RAT, the network entity 902 may send the de-prioritization indication. The indication may be received in an RRC connection release message. The indication may indicate whether the current carrier frequency or RAT is to be de-prioritized, for example, via a deprioritisationReq field. In certain aspects, the indication may indicate a duration of the de-prioritization (e.g., deprioritisationTimer) . The UE 904 may start or restart timer T325 with the timer value set to the deprioritisationTimer signaled at 908.
[0116] At 910, the UE 904 applies a common de-prioritization across the first subscription 906a and the second subscription 906b for the duration of the timer T325. For example, the de-prioritization indication obtained at 908 may be included in common cell-level information amongst the subscriptions 906a, 906b.
[0117] At 912, while the timer T325 is running, the UE 904 communicates with the network entity 902 via the second subscription 906b using another carrier frequency and / or RAT different from the carrier frequency and / or RAT that is de-prioritized. Accordingly, the common cell-level information may reduce the latency in applying a de-prioritization across multiple subscriptions of a UE. In such cases, the common de-prioritization shared among subscriptions may enable a subscription to avoid communications (or refrain from communicating) on a de-prioritized carrier frequency and / or RAT. Thus, the common de-prioritization may enable reduced latencies (in establishing communications) , reduced interference (on the de-prioritized carrier / RAT) , efficient channel usage (on the other carrier / RAT) , and / or efficient network loading (on the other carrier / RAT) .
[0118] Note that FIGS. 7-9 illustrate examples of sharing cell-level information among multiple subscriptions at a UE to facilitate understanding. Aspects of the present disclosure for sharing cell-level information among multiple subscriptions may be applied to other operations, such as various cell-level radio resource control operations.
[0119] Example Operations of Sharing Cell-Level Information
[0120] FIG. 10 shows a method 1000 for wireless communications by an apparatus, such as UE 104 of FIGS. 1 and 3.
[0121] Method 1000 begins at block 1005 with obtaining cell-level information (e.g., the cell-level information 606) associated with at least a first subscription (e.g., the first subscription 602) , the cell-level information being specific to a cell (e.g., the first cell 510a) . In certain aspects, the cell-level information comprises one or more parameters for performance of one or more connection control procedures. In certain aspects, the one or more parameters comprise one or more radio resource control parameters. In certain aspects, the one or more parameters comprise one or more of: one or more thresholds, one or more counters, one or more timers, or one or more constants.
[0122] Method 1000 then proceeds to block 1010 with communicating via a second subscription based at least in part on the cell-level information. For example, the apparatus may use the cell-level information for performing cell selection, applying certain cell-selection criterion, radio link failure detection, and / or de-prioritization operations.
[0123] In certain aspects, method 1000 further includes updating the cell-level information in response to occurrence of at least one or more events associated with the first subscription.
[0124] In certain aspects, method 1000 further includes communicating via the first subscription on one or more first resources via the cell, wherein block 1010 includes communicating via the second subscription on one or more second resources via the cell.
[0125] In certain aspects, block 1010 includes triggering a cell selection operation via the second subscription based at least in part on the cell-level information. In certain aspects, method 1000 further includes determining a first counter value based on a first number of failed connection attempts among the first subscription and the second subscription, the cell-level information comprising the first counter value. In certain aspects, method 1000 further includes applying an offset (e.g., Qoffsettemp) to a cell selection criterion associated with the cell for the cell selection operation in response to the first counter value satisfying a first threshold, the cell-level information comprising the first threshold. In certain aspects, the cell selection criterion is fulfilled when a signal strength associated with the cell satisfies a signal strength threshold and a signal quality associated with the cell satisfies a signal quality threshold; and the method 1000 further comprises determining the signal strength and the signal quality associated with the cell based at least in part on the offset.
[0126] In certain aspects, method 1000 further includes determining a second counter value based on a second number of failed connection attempts for the first subscription. In certain aspects, method 1000 further includes determining a third counter value based on a third number of failed connection attempts for the second subscription. In certain aspects, method 1000 further includes applying an offset to a cell selection criterion associated in response to: (i) the first counter value satisfying a first threshold, (ii) the second counter value satisfying a second threshold, and (iii) the third counter value satisfying a third threshold, the cell-level information comprising the first threshold, the second counter value, the third counter value, the second threshold, and the third threshold.
[0127] In certain aspects, block 1010 includes detecting a radio link failure associated with the cell based at least in part on the cell-level information. In certain aspects, block 1010 includes sending a connection request via the second subscription in response to the detected radio link failure. In certain aspects, method 1000 further includes determining a first counter value based on a number of out-of-sync indications associated with the cell among the first subscription and the second subscription. In certain aspects, method 1000 further includes determining a second counter value based on a number of in-sync indications associated with the cell among the first subscription and the second subscription, the cell-level information comprising the first counter value and the second counter value.
[0128] In certain aspects, method 1000 further includes generating an out-of-sync indication in response to a radio link quality associated with the cell being below an out-of-sync threshold. In certain aspects, method 1000 further includes generating an in-sync indication in response to the radio link quality associated with the cell being above an in-sync threshold. In certain aspects, method 1000 further includes starting a first timer in response to the first counter value satisfying a first threshold. In certain aspects, method 1000 further includes stopping the first timer in response to the second counter value satisfying a second threshold. In certain aspects, detecting the radio link failure comprises detecting the radio link failure in response to expiration of the first timer.
[0129] In certain aspects, block 1005 includes obtaining, via the first subscription, an indication that the cell and / or a RAT is de-prioritized, the cell-level information comprising the indication that the cell and / or the RAT is de-prioritized; and block 1010 includes communicating via the second subscription based on the indication that the cell and / or the RAT is de-prioritized.
[0130] In certain aspects, method 1000 further includes communicating via the first subscription and the second subscription while the first subscription and the second subscription are active, for example, in a DSDA mode.
[0131] In certain aspects, method 1000, or any aspect related to it, may be performed by an apparatus, such as communications device 1100 of FIG. 11, which includes various components operable, configured, or adapted to perform the method 1000. Communications device 1100 is described below in further detail.
[0132] Note that FIG. 10 is just one example of a method, and other methods including fewer, additional, or alternative operations are possible consistent with this disclosure.
[0133] Example Communications Device
[0134] FIG. 11 depicts aspects of an example communications device 1100. In some aspects, communications device 1100 is a user equipment, such as UE 104 described above with respect to FIGS. 1 and 3.
[0135] The communications device 1100 includes a processing system 1102 coupled to a transceiver 1142 (e.g., a transmitter and / or a receiver) . The transceiver 1142 is configured to transmit and receive signals for the communications device 1100 via an antenna 1144, such as the various signals as described herein. The processing system 1102 may be configured to perform processing functions for the communications device 1100, including processing signals received and / or to be transmitted by the communications device 1100.
[0136] The processing system 1102 includes one or more processors 1104. In various aspects, the one or more processors 1104 may be representative of one or more of receive processor 358, transmit processor 364, TX MIMO processor 366, and / or controller / processor 380, as described with respect to FIG. 3. The one or more processors 1104 are coupled to a computer-readable medium / memory 1122 via a bus 1140. In certain aspects, the computer-readable medium / memory 1122 is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors 1104, enable and cause the one or more processors 1104 to perform the method 1000 described with respect to FIG. 10, or any aspect related to it, including any operations described in relation to FIG. 10. Note that reference to a processor performing a function of communications device 1100 may include one or more processors performing that function of communications device 1100, such as in a distributed fashion.
[0137] In the depicted example, computer-readable medium / memory 1122 stores code for obtaining 1124, code for communicating 1126, code for updating 1128, code for determining 1130, code for applying 1132, code for generating 1134, code for starting 1136, and code for stopping 1138. Processing of the code 1124-1138 may enable and cause the communications device 1100 to perform the method 1000 described with respect to FIG. 10, or any aspect related to it.
[0138] The one or more processors 1104 include circuitry configured to implement (e.g., execute) the code stored in the computer-readable medium / memory 1122, including circuitry for obtaining 1106, circuitry for communicating 1108, circuitry for updating 1110, circuitry for determining 1112, circuitry for applying 1114, circuitry for generating 1116, circuitry for starting 1118, and circuitry for stopping 1120. Processing with circuitry 1106-1120 may enable and cause the communications device 1100 to perform the method 1000 described with respect to FIG. 10, or any aspect related to it.
[0139] More generally, means for communicating, transmitting, sending or outputting for transmission may include the transceivers 354, antenna (s) 352, transmit processor 364, TX MIMO processor 366, AI processor 370, and / or controller / processor 380 of the UE 104 illustrated in FIG. 3, transceiver 1142 and / or antenna 1144 of the communications device 1100 in FIG. 11, and / or one or more processors 1104 of the communications device 1100 in FIG. 11. Means for communicating, receiving or obtaining may include the transceivers 354, anteuna (s) 352, receive processor 358, AI processor 370, and / or controller / processor 380 of the UE 104 illustrated in FIG. 3, transceiver 1142 and / or antenna 1144 of the communications device 1100 in FIG. 11, and / or one or more processors 1104 of the communications device 1100 in FIG. 11. Means for updating, determining, applying, generating, starting, and stopping may include the controller / processor 380 of the UE 104 illustrated in FIG. 3, and / or one or more processors 1104 of the communications device 1100 in FIG. 11.
[0140] Example Clauses
[0141] Implementation examples are described in the following numbered clauses:
[0142] Clause 1: A method for wireless communications by an apparatus comprising: obtaining cell-level information associated with at least a first subscription, the cell-level information being specific to a cell; and communicating via a second subscription based at least in part on the cell-level information.
[0143] Clause 2: The method of Clause 1, further comprising updating the cell-level information in response to occurrence of at least one or more events associated with the first subscription.
[0144] Clause 3: The method of Clause 1 or 2, wherein the cell-level information comprises one or more parameters for performance of one or more connection control procedures.
[0145] Clause 4: The method of Clause 3, wherein the one or more parameters comprise one or more radio resource control parameters.
[0146] Clause 5: The method of Clause 3 or 4, wherein the one or more parameters comprise one or more of: one or more thresholds, one or more counters, one or more timers, or one or more constants.
[0147] Clause 6: The apparatus of any one of Clauses 1-5, further comprising: communicating via the first subscription on one or more first resources via the cell, wherein communicating via the second subscription comprises communicating via the second subscription on one or more second resources via the cell.
[0148] Clause 7: The method of any one of Clauses 1-6, wherein communicating via the second subscription comprises triggering a cell selection operation via the second subscription based at least in part on the cell-level information.
[0149] Clause 8: The method of Clause 7, further comprising determining a first counter value based on a first number of failed connection attempts among the first subscription and the second subscription, the cell-level information comprising the first counter value.
[0150] Clause 9: The method of Clause 8, further comprising applying an offset to a cell selection criterion associated with the cell for the cell selection operation in response to the first counter value satisfying a first threshold, the cell-level information comprising the first threshold.
[0151] Clause 10: The method of Clause 9, wherein: the cell selection criterion is fulfilled when a signal strength associated with the cell satisfies a signal strength threshold and a signal quality associated with the cell satisfies a signal quality threshold; and the method further comprises determining the signal strength and the signal quality associated with the cell based at least in part on the offset.
[0152] Clause 11: The apparatus of Clause 8 or 10, further comprising: determining a second counter value based on a second number of failed connection attempts for the first subscription; determining a third counter value based on a third number of failed connection attempts for the second subscription; and applying an offset to a cell selection criterion associated in response to: (i) the first counter value satisfying a first threshold, (ii) the second counter value satisfying a second threshold, and (iii) the third counter value satisfying a third threshold, the cell-level information comprising the first threshold, the second counter value, the third counter value, the second threshold, and the third threshold.
[0153] Clause 12: The method of any one of Clauses 1-11, wherein communicating via the second subscription comprises detecting a radio link failure associated with the cell based at least in part on the cell-level information and sending a connection request via the second subscription in response to the detected radio link failure.
[0154] Clause 13: The method of Clause 12, further comprising: determining a first counter value based on a number of out-of-sync indications associated with the cell among the first subscription and the second subscription; and determining a second counter value based on a number of in-sync indications associated with the cell among the first subscription and the second subscription, the cell-level information comprising the first counter value and the second counter value.
[0155] Clause 14: The method of Clause 13, further comprising: generating an out-of-sync indication in response to a radio link quality associated with the cell being below an out-of-sync threshold; and generating an in-sync indication in response to the radio link quality associated with the cell being above an in-sync threshold.
[0156] Clause 15: The apparatus of Clause 13 or 14, further comprising: starting a first timer in response to the first counter value satisfying a first threshold; and stopping the first timer in response to the second counter value satisfying a second threshold.
[0157] Clause 16: The method of Clause 15, wherein detecting the radio link failure comprises detecting the radio link failure in response to expiration of the first timer.
[0158] Clause 17: The method of any one of Clauses 1-16, wherein: obtaining the cell-level information comprises obtaining, via the first subscription, an indication that the cell is de-prioritized, the cell-level information comprising the indication that the cell is de-prioritized; and communicating via the second subscription comprises communicating via the second subscription based on the indication that the cell is de-prioritized.
[0159] Clause 18: The method of any one of Clauses 1-17, further comprising communicating via the first subscription and the second subscription while the first subscription and the second subscription are active.
[0160] Clause 19: One or more apparatuses, comprising: one or more memories comprising executable instructions; and one or more processors configured to execute the executable instructions and cause the one or more apparatuses to perform a method in accordance with any one of Clauses 1-18.
[0161] Clause 20: One or more apparatuses, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the one or more apparatuses to perform a method in accordance with any one of Clauses 1-18.
[0162] Clause 21: One or more apparatuses, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to perform a method in accordance with any one of Clauses 1-18.
[0163] Clause 22: One or more apparatuses, comprising means for performing a method in accordance with any one of Clauses 1-18.
[0164] Clause 23: One or more non-transitory computer-readable media comprising executable instructions that, when executed by one or more processors of one or more apparatuses, cause the one or more apparatuses to perform a method in accordance with any one of Clauses 1-18.
[0165] Clause 24: One or more computer program products embodied on one or more computer-readable storage media comprising code for performing a method in accordance with any one of Clauses 1-18.
[0166] Clause 25: A user equipment (UE) , comprising: a processing system that includes processor circuitry and memory circuitry that stores code and is coupled with the processor circuitry, the processing system configured to cause the UE to perform a method in accordance with any one of Clauses 1-18.
[0167] Additional Considerations
[0168] The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein are not limiting of the scope, applicability, or aspects set forth in the claims. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. For example, changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various actions may be added, omitted, or combined. Also, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method that is practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0169] The various illustrative logical blocks, modules and circuits described in connection with the present disclosure may be implemented or performed with a general purpose processor, an AI processor, a digital signal processor (DSP) , an ASIC, a field programmable gate array (FPGA) or other programmable logic device (PLD) , discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination ora DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, a system on a chip (SoC) , or any other such configuration.
[0170] As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
[0171] As used herein, the term “determining” encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
[0172] As used herein, “coupled to” and “coupled with” generally encompass direct coupling and indirect coupling (e.g., including intermediary coupled aspects) unless stated otherwise. For example, stating that a processor is coupled to a memory allows for a direct coupling or a coupling via an intermediary aspect, such as a bus.
[0173] The methods disclosed herein comprise one or more actions for achieving the methods. The method actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of actions is specified, the order and / or use of specific actions may be modified without departing from the scope of the claims. Further, the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions. The means may include various hardware and / or software component (s) and / or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
[0174] The following claims are not intended to be limited to the aspects shown herein, but are to be accorded the full scope consistent with the language of the claims. Reference to an element in the singular is not intended to mean only one unless specifically so stated, but rather “one or more. ” The subsequent use of a definite article (e.g., “the” or “said” ) with an element (e.g., “the processor” ) is not intended to invoke a singular meaning (e.g., “only one” ) on the element unless otherwise specifically stated. For example, reference to an element (e.g., “aprocessor, ” “acontroller, ” “amemory, ” “a transceiver, ” “an antenna, ” “the processor, ” “the controller, ” “the memory, ” “the transceiver, ” “the antenna, ” etc. ) , unless otherwise specifically stated, should be understood to refer to one or more elements (e.g., “one or more processors, ” “one or more controllers, ” “one or more memories, ” “one more transceivers, ” etc. ) . The terms “set” and “group” are intended to include one or more elements, and may be used interchangeably with “one or more. ” Where reference is made to one or more elements performing functions (e.g., steps of a method) , one element may perform all functions, or more than one element may collectively perform the functions. When more than one element collectively performs the functions, each function need not be performed by each of those elements (e.g., different functions may be performed by different elements) and / or each function need not be performed in whole by only one element (e.g., different elements may perform different sub-functions of a function) . Similarly, where reference is made to one or more elements configured to cause another element (e.g., an apparatus) to perform functions, one element may be configured to cause the other element to perform all functions, or more than one element may collectively be configured to cause the other element to perform the functions. Unless specifically stated otherwise, the term “some” refers to one or more. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims.
Claims
1.An apparatus configured for wireless communications, comprising:one or more memories; andone or more processors coupled to the one or more memories, the one or more processors being configured to cause the apparatus to:obtain cell-level information associated with at least a first subscription, the cell-level information being specific to a cell; andcommunicate via a second subscription based at least in part on the cell-level information.2.The apparatus of claim 1, wherein the one or more processors are configured to cause the apparatus to update the cell-level information in response to occurrence of at least one or more events associated with the first subscription.3.The apparatus of claim 1, wherein the cell-level information comprises one or more parameters for performance of one or more connection control procedures.4.The apparatus of claim 3, wherein the one or more parameters comprise one or more radio resource control parameters.5.The apparatus of claim 3, wherein the one or more parameters comprise one or more of: one or more thresholds, one or more counters, one or more timers, or one or more constants.6.The apparatus of claim 1, wherein:the one or more processors are configured to cause the apparatus to communicate via the first subscription on one or more first resources via the cell; andto communicate via the second subscription, the one or more processors are configured to cause the apparatus to communicate via the second subscription on one or more second resources via the cell.7.The apparatus of claim 1, wherein to communicate via the second subscription, the one or more processors are configured to cause the apparatus to trigger a cell selection operation via the second subscription based at least in part on the cell-level information.8.The apparatus of claim 7, wherein the one or more processors are configured to cause the apparatus to determine a first counter value based on a first number of failed connection attempts among the first subscription and the second subscription, the cell-level information comprising the first counter value.9.The apparatus of claim 8, wherein the one or more processors are configured to cause the apparatus to apply an offset to a cell selection criterion associated with the cell for the cell selection operation in response to the first counter value satisfying a first threshold, the cell-level information comprising the first threshold.10.The apparatus of claim 9, wherein:the cell selection criterion is fulfilled when a signal strength associated with the cell satisfies a signal strength threshold and a signal quality associated with the cell satisfies a signal quality threshold; andthe one or more processors are configured to cause the apparatus to determine the signal strength and the signal quality associated with the cell based at least in part on the offset.11.The apparatus of claim 8, wherein the one or more processors are configured to cause the apparatus to:determine a second counter value based on a second number of failed connection attempts for the first subscription;determine a third counter value based on a third number of failed connection attempts for the second subscription; andapply an offset to a cell selection criterion associated in response to: (i) the first counter value satisfying a first threshold, (ii) the second counter value satisfying a second threshold, and (iii) the third counter value satisfying a third threshold, the cell-level information comprising the first threshold, the second counter value, the third counter value, the second threshold, and the third threshold.12.The apparatus of claim 1, wherein to communicate via the second subscription, the one or more processors are configured to cause the apparatus to:detect a radio link failure associated with the cell based at least in part on the cell-level information; andsend a connection request via the second subscription in response to the detected radio link failure.13.The apparatus of claim 12, wherein the one or more processors are configured to cause the apparatus to:determine a first counter value based on a number of out-of-sync indications associated with the cell among the first subscription and the second subscription; anddetermine a second counter value based on a number of in-sync indications associated with the cell among the first subscription and the second subscription, the cell-level information comprising the first counter value and the second counter value.14.The apparatus of claim 13, wherein the one or more processors are configured to cause the apparatus to:generate an out-of-sync indication in response to a radio link quality associated with the cell being below an out-of-sync threshold; andgenerate an in-sync indication in response to the radio link quality associated with the cell being above an in-sync threshold.15.The apparatus of claim 13, wherein:the one or more processors are configured to cause the apparatus to start a first timer in response to the first counter value satisfying a first threshold; andthe one or more processors are configured to cause the apparatus to stop the first timer in response to the second counter value satisfying a second threshold.16.The apparatus of claim 15, wherein to detect the radio link failure, the one or more processors are configured to cause the apparatus to detect the radio link failure in response to expiration of the first timer.17.The apparatus of claim 1, wherein:to obtain the cell-level information, the one or more processors are configured to cause the apparatus to obtain, via the first subscription, an indication that the cell is de-prioritized, the cell-level information comprising the indication that the cell is de-prioritized; andto communicate via the second subscription, the one or more processors are configured to cause the apparatus to communicate via the second subscription based on the indication that the cell is de-prioritized.18.The apparatus of claim 1, wherein the one or more processors are configured to cause the apparatus to communicate via the first subscription and the second subscription while the first subscription and the second subscription are active.19.An apparatus configured for wireless communications, comprising:means for obtaining cell-level information associated with at least a first subscription, the cell-level information being specific to a cell; andmeans for communicating via a second subscription based at least in part on the cell-level information.20.A method for wireless communications by an apparatus comprising:obtaining cell-level information associated with at least a first subscription, the cell-level information being specific to a cell; andcommunicating via a second subscription based at least in part on the cell-level information.
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