Techniques for enhancing paging sharing for dual subscription devices using channel quality based merge conditions

Abstract

Methods, systems, and devices for wireless communication are described. In some systems, a user equipment (UE), such as a dual subscription UE, supports a first subscription and a second subscription. The first subscription may be in an active mode with a first cell and the second subscription may be in an idle mode with a second cell, and the UE may determine whether to exit or postpone into a merge state according to a channel quality-based merge condition, the UE may perform idle mode measurements for the second subscription using the first subscription and the first cell in the merged state. For example, the UE may measure a channel quality associated with a communication link between the UE and the first cell, and in an example in which the measured channel quality fails to meet a threshold channel quality, the UE may exit or postpone into a merge state.

Description

[0001] This application is a divisional application of the patent application filed on October 14, 2021, with international application number PCT / CN2021 / 123718 and Chinese national application date of October 14, 2021, application number 202180069130.9, entitled "Technique for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions".

[0002] Cross-referencing

[0003] This patent application claims priority to International Patent Application No. PCT / CN2020 / 120812, filed by Xie et al. on October 14, 2020, entitled “TECHNIQUES FORENHANCING PAGE SHARING USING A CHANNEL QUALITY-BASED MERGE CONDITION FORDUAL-SUBSCRIPTION DEVICES”, which is assigned to the assignee of this application. open field

[0004] For example, this disclosure relates to wireless communication systems, including techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions. Background Technology

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems, LTE-A Advanced (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems can employ various technologies, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication from multiple communication devices, which may also be referred to as User Equipment (UE).

[0006] In some wireless communication systems, a UE can support multiple subscriptions (e.g., by using multiple Subscriber Identity Module (SIM) cards), and can utilize multiple subscriptions to establish connections with the serving cell. In some cases, a UE can support two subscriptions belonging to the same operator or different operators but sharing the same Radio Access Network (RAN). In such cases, the UE can adopt an operating mode where it performs idle mode measurements for one subscription via another, which can result in lower power costs and increased throughput. However, such an operating mode may lead to poor performance under certain network conditions. Overview

[0007] The described technology relates to improved methods, systems, devices, and apparatuses for enhancing paging sharing in dual-subscription devices using channel quality-based merging conditions. For example, a user equipment (UE) may support a first subscription as a default data subscription (DDS) and a second subscription as a non-DDS (nDDS), and in an example where the first subscription is active and the second subscription is in an idle mode, the UE can employ paging sharing technology by using the first subscription to receive paging messages or performing various other idle mode measurements for the second subscription. The UE may employ such paging sharing technology in an example where the first and second subscriptions are merged, which may be referred to herein as a first operating mode.

[0008] In some implementations of this disclosure, the UE can adjust the continuation or entry into a merged state between a first subscription and a second subscription based on merging conditions based on channel quality. For example, the UE can exit a merged state or postpone entering a merged state based on the channel quality associated with the communication link between the UE and the serving cell, wherein the first subscription (e.g., a subscription in active mode) has established a connection with the serving cell. For example, in some examples, the UE can operate in a merged state (e.g., using the first subscription to receive paging messages and perform various other idle mode measurements for the second subscription); measure the channel quality associated with the communication link between the UE and the serving cell; and exit the merged state if the measured channel quality fails to meet a threshold channel quality (e.g., using the second subscription instead of the first subscription to receive paging messages and perform various other idle mode measurements for the second subscription). In some other examples, the UE can determine that criteria for entering a merged state are met (e.g., the UE's Radio Resource Control (RRC) protocol can trigger the initiation of a merged state); measure the channel quality associated with the communication link between the UE and the serving cell; and postpone initiating entry into a merged state if the measured channel quality fails to meet a threshold channel quality.

[0009] In an example where a UE exits or postpones the merge state between a first and second subscription due to failure to meet channel quality-based merging conditions, the UE can initiate a timer, and while the timer is running, the UE can suppress attempts to enter (or re-enter) the merge state. This allows the UE to avoid back-to-back merge-then-depart scenarios, where the UE can enter and exit the merge state within a relatively short timeframe, potentially leading to coverage disruptions and increased power consumption at the UE. However, if the first subscription establishes a connection with a new serving cell (e.g., a different serving cell than the one the first subscription initially connected to), the UE can terminate the timer and determine whether to enter (or re-enter) the merge state based on measurements of the channel quality associated with the communication link between the UE and the new serving cell.

[0010] A method for wireless communication at a UE is described. The method may include: identifying that a first subscription of the UE and a first cell are in an active mode; identifying that a second subscription of the UE and a second cell are in an idle mode; identifying a first operating mode of the UE, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; exiting the first operating mode based on the failure to meet the threshold channel quality; and performing the idle mode measurement for the second subscription using the second subscription based on the UE exiting the first operating mode.

[0011] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. These instructions are processor-executable to cause the apparatus to: identify a first subscription of the UE and a first cell as being in an active mode; identify a second subscription of the UE and a second cell as being in an idle mode; identify a first operating mode of the UE, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; exiting the first operating mode based on the failure to meet the threshold channel quality; and performing the idle mode measurement for the second subscription using the second subscription based on the UE exiting the first operating mode.

[0012] Another apparatus for wireless communication at a UE is described. The apparatus may include means for: identifying a first subscription of the UE and a first cell as being in an active mode; identifying a second subscription of the UE and a second cell as being in an idle mode; identifying a first operating mode of the UE, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; exiting the first operating mode based on the failure to meet the threshold channel quality; and performing the idle mode measurement for the second subscription using the second subscription based on the UE exiting the first operating mode.

[0013] A non-transient computer-readable medium is described, storing code for wireless communication at a UE. The code may include instructions executable by a processor to: identify that a first subscription of the UE and a first cell are in an active mode; identify that a second subscription of the UE and a second cell are in an idle mode; identify a first operating mode of the UE, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; exiting the first operating mode based on the failure to meet the threshold channel quality; and performing the idle mode measurement for the second subscription using the second subscription based on the UE exiting the first operating mode.

[0014] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for initiating a timer based on the UE exiting the first operating mode, wherein the idle mode measurement for the second subscription may be performed using the second subscription for at least the duration of the timer.

[0015] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means, or instructions for: determining, during the duration of the timer, that the UE uses the first subscription to establish a connection with the third cell; terminating the timer based on the establishment of the connection with the third cell using the first subscription; determining whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality; and determining whether to re-enter the first operating mode based on whether the second channel quality meets the threshold channel quality.

[0016] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: determining that the timer expires; determining whether the first channel quality associated with the first communication link between the UE and the first cell meets the threshold channel quality; and determining whether to re-enter the first operating mode based on whether the first channel quality meets the threshold channel quality.

[0017] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, exiting the first operating mode may include operations, features, means, or instructions for the following actions: triggering the exit from the first operating mode based on a Radio Resource Control (RRC) protocol, wherein the RRC protocol trigger may be activated based on failure to meet a threshold channel quality.

[0018] Examples of methods, apparatus (devices), and non-transient computer-readable media described herein may further include operations, features, means, or instructions for detecting a threshold number of consecutive cyclic redundancy check (CRC) failures associated with a data channel of the first communication link based on a paging radio network temporary identifier (P-RNTI), wherein failure to meet the threshold channel quality is based at least in part on the detection of the threshold number of consecutive CRC failures associated with the data channel.

[0019] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, failure to meet the threshold channel quality includes failure to meet the channel quality-based merging conditions associated with the first operating mode.

[0020] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, the first channel quality includes the reference signal received power (RSRP) or the signal-to-noise ratio (SNR).

[0021] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, the first subscription may be a default data subscription (DDS), while the second subscription may be a non-DDS (nDDS).

[0022] A method for wireless communication at a UE is described. The method may include: identifying that a first subscription of the UE and a first cell are in an active mode; identifying that a second subscription of the UE and a second cell are in an idle mode; determining that criteria for entering a first operating mode are met, in which the UE uses the first subscription to perform idle mode measurements for the second subscription; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; and delaying the initiation of the first operating mode based on the failure to meet the threshold channel quality.

[0023] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. These instructions are processor-executable to cause the apparatus to: identify that a first subscription of the UE and a first cell are in an active mode; identify that a second subscription of the UE and a second cell are in an idle mode; determine that criteria for entering a first operating mode are met, in which the UE uses the first subscription to perform idle mode measurements for the second subscription; determine that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; and postpone initiating the first operating mode based on the failure to meet the threshold channel quality.

[0024] Another device for wireless communication at a UE is described. The device may include means for: identifying a first subscription of the UE in an active mode with a first cell; identifying a second subscription of the UE in an idle mode with a second cell; determining that criteria for entering a first operating mode are met, in which the UE uses the first subscription to perform idle mode measurements for the second subscription; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; and delaying the initiation of the first operating mode based on the failure to meet the threshold channel quality.

[0025] A non-transient computer-readable medium is described, storing code for wireless communication at a UE. The code may include instructions executable by a processor to: identify that a first subscription of the UE and a first cell are in an active mode; identify that a second subscription of the UE and a second cell are in an idle mode; determine that criteria for entering a first operating mode are met, in which the UE uses the first subscription to perform idle mode measurements for the second subscription; determine that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; and postpone initiating the first operating mode based on the failure to meet the threshold channel quality.

[0026] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for initiating a timer based on the failure to meet the threshold channel quality, wherein the initiation of the first operating mode may be postponed for at least the duration of the timer.

[0027] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: identifying that the first subscription of the UE has switched to an idle mode with the first cell; and initiating cell reselection and measurement for the first subscription.

[0028] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means, or instructions for: determining, during the duration of the timer, that the UE uses the first subscription to establish a connection with the third cell; terminating the timer based on the establishment of the connection with the third cell using the first subscription; determining whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality; and determining whether to initiate the first operating mode based on whether the second channel quality meets the threshold channel quality.

[0029] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: determining that the timer expires; determining whether the first channel quality associated with the first communication link between the UE and the first cell meets the threshold channel quality; and determining whether to initiate the first operating mode based on whether the first channel quality meets the threshold channel quality.

[0030] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for determining that the second subscription is capable of using the first cell to perform the first operating mode with the first subscription, wherein the criterion for determining that entering the first operating mode can be satisfied may be based on determining that the second subscription is capable of using the first cell to perform the first operating mode with the first subscription.

[0031] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, determining that the criteria for entering the first operating mode may include operations, features, means, or instructions for determining that the initiation of the first operating mode may have been triggered by the UE's RRC protocol.

[0032] Some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein may further include operations, features, means or instructions for detecting a threshold number of consecutive CRC failures associated with a data channel of the first communication link based on P-RNTI, wherein failure to meet the threshold channel quality is based at least in part on the detection of the threshold number of consecutive CRC failures associated with the data channel.

[0033] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, failure to meet the threshold channel quality includes failure to meet the channel quality-based merging conditions associated with the first operating mode.

[0034] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, the first channel quality includes RSRP or SNR.

[0035] In some examples of the methods, apparatus (devices) and non-transient computer-readable media described herein, the first subscription may be a DDS and the second subscription may be an nDDS. Brief description of the attached diagram

[0036] Figure 1 and Figure 2 Examples of wireless communication systems supported by various aspects of this disclosure for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions are explained.

[0037] Figure 3 Examples of processing timelines supporting various aspects of this disclosure for using channel quality-based merging conditions to enhance paging sharing for dual-subscription devices are described.

[0038] Figure 4 Examples of processing timelines supporting various aspects of this disclosure for using channel quality-based merging conditions to enhance paging sharing for dual-subscription devices are described.

[0039] Figure 5 and Figure 6 A block diagram of an apparatus supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions is shown, according to various aspects of this disclosure.

[0040] Figure 7 A block diagram of a communication manager supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions is shown, according to various aspects of this disclosure.

[0041] Figure 8A diagram is shown of a system including a device for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions, according to various aspects of this disclosure.

[0042] Figures 9 to 12 A flowchart illustrating a method for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions is shown, according to various aspects of this disclosure. Detailed description

[0043] In some wireless communication systems, a user equipment (UE) can support more than one subscription. Such a UE can be called a dual-subscription device, a dual-subscriber identity module (SIM) device, or a multi-SIM device. A dual-subscription UE can designate one subscription, such as a first subscription, as the default data subscription (DDS), and another subscription, such as a second subscription, as a non-DDS (nDDS). It can operate the first subscription in active mode and the second subscription in idle mode. In some cases, the UE can initiate a merge state between the first and second subscriptions (e.g., to save power). In the merge state, the UE can use the first subscription, which can connect to a first cell, to perform idle mode measurements (such as receiving paging messages) for the second subscription, which can connect to a second cell.

[0044] In some scenarios, such as when channel quality deteriorates between the UE and the first cell, using the first subscription to perform idle mode measurements for the second subscription may become suboptimal. For example, in cases of deteriorated channel quality between the UE and the first cell, the UE may be unable to successfully receive paging messages for the second subscription using both the first subscription and the first cell. Although suboptimal idle mode measurements for the second subscription are more likely in such poor channel quality scenarios, the UE can maintain the first and second subscriptions in a combined state until a radio link failure (RLF) event triggers, separating the second subscription from the first subscription. However, the UE can suppress an RLF declaration until a threshold time duration during which the UE fails to receive a handover command from the base station, and thus, the second subscription can remain combined with the first subscription during the threshold time duration, during which channel quality may be relatively poor. Therefore, the first subscription can perform suboptimal idle mode measurements for the second subscription within the threshold time duration (until the UE declares an RLF).

[0045] In some implementations of this disclosure, the UE may support channel quality-based merging conditions to initiate the separation of the second subscription from the first subscription before the UE declares an RLF. For example, when the first and second subscriptions are in a merged state, the UE may perform one or more measurements of the channel quality of the communication link between the UE and the first cell (which the UE can use to communicate with the first subscription), and if the measured channel quality fails to meet a threshold channel quality, it may exit the merged state (e.g., separate the second subscription from the first subscription). Similarly, if the first and second subscriptions are to enter a merged state but have not yet done so, the UE may measure the channel quality of the communication link between the UE and the first cell, and if the measured channel quality fails to meet a threshold channel quality, it may postpone the first and second subscriptions from entering the merged state. In some examples, the UE may set a timer to delay any future attempts to enter the merged state based on determining that the measured channel quality fails to meet the threshold channel quality. However, in the example where the first subscription establishes a connection with a different cell (e.g., a third cell), the UE may terminate the timer and perform channel measurements for the different cell to determine whether to use that different cell to enter the merged state.

[0046] Implementations of the subject matter described in this disclosure are possible to achieve one or more of the following potential advantages. In some implementations, the described techniques can provide more optimized idle mode measurements, such as receiving paging messages, for a second subscription in a dual-subscription device supporting a merged state. For example, based on the implementation of the described techniques, the UE can exit or postpone a merged state between the first and second subscriptions based on channel quality-based merging conditions that may result in suboptimal idle mode measurements for the second subscription, and the UE can apply the channel quality-based merging conditions prior to the declaration of the RLF. Therefore, the UE can reduce the amount of time the second subscription may be affected by suboptimal idle mode measurements due to merging with the first subscription, or completely avoid such suboptimal idle mode measurements for the second subscription, which can result in more seamless coverage and communication for the second subscription. Furthermore, the UE can avoid back-to-back merge-then-separate scenarios where the first and second subscriptions can oscillate between merged and separated states by setting a timer for delaying future attempts to enter the merged state, which also provides more seamless coverage while potentially increasing power savings at the UE by reducing the number of processing operations associated with entering and exiting the merged state.

[0047] The aspects of this disclosure are initially described in the context of wireless communication systems. The aspects of this disclosure are additionally explained and described by reference to a processing timeline. The aspects of this disclosure are further explained and described by reference to apparatus diagrams, system diagrams, and flowcharts relating to techniques for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions.

[0048] Figure 1 Examples of a wireless communication system 100 supporting techniques for enhancing paging sharing between dual-subscription devices using channel quality-based combining conditions are described according to various aspects of this disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0049] Base station 105 can be distributed across a geographical area to form wireless communication system 100, and can be different types of devices or devices with different capabilities. Base station 105 and UE 115 can communicate wirelessly via one or more communication links 125. Each base station 105 can provide a coverage area 110, and UE 115 and base station 105 can establish one or more communication links 125 on the coverage area 110. Coverage area 110 can be an example of a geographical area over which base station 105 and UE 115 can support signal communication according to one or more radio access technologies.

[0050] Each UE 115 can be distributed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary and mobile at different times. Each UE 115 can be a different type of device or a device with different capabilities. Figure 1 The document describes some example UE 115s. The UE 115 described herein can communicate with various types of devices, such as other UE 115s, base station 105, or network equipment (e.g., core network nodes, relay equipment, integrated access and backhaul (IAB) nodes, or other network equipment). Figure 1 As shown in the image.

[0051] Each base station 105 may communicate with the core network 130, or with each other, or both. For example, base station 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base stations 105 may communicate with each other directly (e.g., directly between base stations 105), indirectly (e.g., via the core network 130), or directly and indirectly on backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, backhaul link 120 may be or include one or more radio links.

[0052] One or more of the base stations 105 described herein may include, or may be referred to by those skilled in the art as, base transceiver station, radio base station, access point, radio transceiver, B node, evolved B node (eNB), next-generation B node or gigabit B node (any of which may be referred to as gNB), home B node, home evolved B node, or other suitable terms.

[0053] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other suitable term, wherein "device" may also be referred to as a unit, station, terminal, or client, etc. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, which can be implemented in various objects such as appliances or vehicles, meters, etc.

[0054] The UE 115 described herein can communicate with various types of devices, such as other UEs 115 that sometimes act as relays, as well as base station 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 As shown in the image.

[0055] UE 115 and base station 105 can wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" can refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the radio spectrum band (e.g., a bandwidth portion (BWP)) operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling coordinating carrier operation, user data, or other signaling. Wireless communication system 100 may support communication with UE 115 using carrier aggregation or multi-carrier operation. UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation can be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0056] In some examples (e.g., in a carrier aggregation configuration), the carrier may also have acquisition signaling or control signaling to coordinate the operation of other carriers. The carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by UE 115. The carrier may operate in an autonomous mode in which initial acquisition and connection can be performed by UE 115 via that carrier, or in a non-autonomous mode in which the carrier may connect to carriers anchored using different carriers (e.g., different carriers of the same or different radio access technologies).

[0057] The communication link 125 shown in the wireless communication system 100 may include uplink transmission from UE 115 to base station 105, or downlink transmission from base station 105 to UE 115. The carrier may carry downlink or uplink communication (e.g., in FDD mode), or may be configured to carry both downlink and uplink communication (e.g., in TDD mode).

[0058] A carrier may be associated with a bandwidth of the radio frequency spectrum, and in some examples, this carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several defined bandwidths of the carrier of a radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication over the carrier bandwidth, or may be configurable to support communication over a single carrier bandwidth within a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over a portion (e.g., a subband, BWP) or all of the carrier bandwidth.

[0059] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate the UE 115 can achieve. Wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and using multiple spatial layers can further improve the data rate or data integrity of communication with the UE 115.

[0060] One or more parameter designs for a carrier can be supported, where the parameter design may include a subcarrier spacing (∆f) and a cyclic prefix. A carrier can be divided into one or more BWPs with the same or different parameter designs. In some examples, the UE 115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time, and communication for the UE 115 can be limited to one or more active BWPs.

[0061] The time interval of base station 105 or UE 115 can be expressed as a multiple of a basic time unit, such as the sampling period T. s =1⁄(∆f max ∙N f ) seconds, where ∆f max This can represent the maximum supported subcarrier spacing, while N fThis can represent the maximum supported Discrete Fourier Transform (DFT) size. The time interval of the communication resources can be organized according to radio frames, each with a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0062] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may (e.g., in the time domain) be divided into subframes, and each subframe may be further divided into several time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include several symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple mini-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N) symbols. f (Number) sampling periods. The duration of a symbol period can depend on the subcarrier spacing or the operating frequency band.

[0063] A subframe, time slot, mini-slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0064] Physical channels can be multiplexed on a carrier using various techniques. Physical control channels and physical data channels can be multiplexed on a downlink carrier, for example, using one or more of time-division multiplexing (TDM), frequency-division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for physical control channels can be defined by the number of symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESET) can be configured for a UE 115 set. For example, one or more UEs 115 can monitor or search control regions for control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for control channel candidates can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information in a control information format having a given payload size. The search space set may include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set, a paging search space, or any combination thereof configured to send control information to a specific UE 115.

[0065] Each base station 105 may provide communication coverage via one or more cells (e.g., macrocells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with base station 105 (e.g., on a carrier) and may be associated with an identifier used to distinguish adjacent cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area 110 or a portion of geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. The extent of such cells may vary from smaller areas (e.g., structures, subsets of structures) to larger areas depending on various factors (such as the capabilities of base station 105). For example, a cell may be or include buildings, subsets of buildings, or external space between or overlapping geographic coverage areas 110, among other examples.

[0066] Macrocells can cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access for UE 115 with a service subscription to a network provider supporting the macrocell. Small cells can be associated with a lower-power base station 105 (compared to macrocells) and can operate in the same or different (e.g., licensed or unlicensed) frequency bands as macrocells. Small cells can provide unrestricted access to UE 115 with a service subscription to a network provider, or can provide restricted access to UE 115 associated with a small cell (e.g., UE 115 in a Closed Subscriber Group (CSG), or UE 115 associated with a user in a home or office). Base station 105 can support one or more cells and can also support communication on one or more cells using one or more component carriers.

[0067] In some examples, a carrier can support multiple cells and can be configured with different cells based on different protocol types that can provide access for different types of devices (e.g., MTC, Narrowband IoT (NB-IoT), Enhanced Mobile Broadband (eMBB)).

[0068] In some examples, base station 105 may be mobile, and thus provide communication coverage to mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may include, for example, a heterogeneous network, in which different types of base stations 105 use the same or different radio access technologies to provide coverage to various geographic coverage areas 110.

[0069] The wireless communication system 100 can support synchronous or asynchronous operation. For synchronous operation, base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately time-aligned. For asynchronous operation, base stations 105 can have different frame timing, and transmissions from different base stations 105 may not be time-aligned in some examples. The techniques described herein can be used for both synchronous and asynchronous operation.

[0070] Some UE 115 devices (such as MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that have integrated sensors or meters to measure or capture information and relay such information to a central server or application that uses the information or presents it to people interacting with the application. Some UE 115 devices may be designed to collect information or automate the behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial toll collection.

[0071] Some UEs 115 can be configured to operate in reduced-power modes, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication can be performed at reduced peak rates. Other power-saving techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communication, operating on limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 can be configured to operate using a narrowband protocol type associated with a defined portion or range (e.g., a subcarrier or resource block (RB) set) within the carrier, within the carrier's guard band, or outside the carrier.

[0072] Wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication, or various combinations thereof. For example, wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency, or mission-critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private or group communication and may be supported by one or more mission-critical services, such as Mission-Critical Talk-to-Talk (MCPTT), Mission-Critical Video (MCVideo), or Mission-Critical Data (MCData). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low latency, mission-critical, and ultra-reliable low latency are used interchangeably herein.

[0073] In some examples, UE 115 may also be able to communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UE 115s utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105 or may be unable to receive transmissions from base station 105 for other reasons. In some examples, groups of UE 115s communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between the individual UE 115s without involving base station 105.

[0074] In some systems, the D2D communication link 135 may be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles may communicate using vehicle-to-vehicle (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles may signal information related to traffic conditions, signal control, weather, safety, emergencies, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate via vehicle-to-network (V2N) communication through one or more network nodes (e.g., base station 105) with roadside infrastructure (such as roadside units), or with the network, or with both.

[0075] Core network 130 provides user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 can be an evolved packet core (EPC) or a 5G core (5GC). The EPC or 5GC may include at least one control plane entity (e.g., a Mobility Management Entity (MME), Access and Mobility Management Function (AMF)) managing access and mobility, and at least one user plane entity (e.g., a Serving Gateway (S-GW), Packet Data Network (PDN) Gateway (P-GW), or User Plane Function (UPF)) routing packets or interconnecting to external networks. The control plane entity manages non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by base station 105 associated with core network 130. User IP packets can be delivered through the user plane entity, which provides IP address allocation and other functions. The user plane entity may be connected to one or more network operator IP services 150. The IP service 150 may include access to the Internet, intranet, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0076] Some network devices (such as base station 105) may include sub-components, such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as a radio headend, smart radio headend, or transmit / receive point (TRP). Each access network transport entity 145 may include one or more antenna panels. In some examples, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio headends and ANCs) or combined into a single network device (e.g., base station 105).

[0077] Wireless communication system 100 can operate using one or more frequency bands, sometimes in the range of 300 MHz to 300 GHz. In some cases, the 300 MHz to 3 GHz band is referred to as a UHF band or decimeter band because the wavelengths range from about 1 decimeter to 1 meter. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can penetrate various structures sufficiently for macrocells to provide service to UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0078] The wireless communication system 100 can also operate in the ultra-high frequency (SHF) zoning using a frequency band from 3 GHz to 30 GHz (also known as the centimeter band) or in the extremely high frequency (EHF) zoning using a spectrum (e.g., from 30 GHz to 300 GHz) (also known as the millimeter band). In some examples, the wireless communication system 100 can support millimeter-wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices can be smaller and more closely spaced than UHF antennas. In some examples, this can facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may suffer even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein can be employed across transmissions using one or more different frequency zonings, and the frequency band usage specified across these frequency zonings may vary by country or regulatory authority.

[0079] Wireless communication system 100 may utilize both licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands, such as the 5 GHz Industrial, Scientific, and Medical (ISM) band. When operating in unlicensed radio spectrum bands, devices (such as base station 105 and UE 115) may employ carrier sensing for collision detection and avoidance. In some examples, operation in unlicensed frequency bands may be based on carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in licensed frequency bands. Operation in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0080] Base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have an antenna array with several rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0081] Base station 105 or UE 115 can use MIMO communication to leverage multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. This technique is known as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0082] Beamforming (also known as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or guide an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array such that some signals propagating in an orientation relative to the antenna array experience constructive interference, while others experience destructive interference. Adjustments to the signals transmitted via the antenna elements may include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element may be defined by a beamforming weight set associated with the orientation (e.g., the antenna array relative to the transmitting or receiving device, or relative to some other orientation).

[0083] Base station 105 or UE 115 may use beamsweeping technology as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions. For example, base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by the transmitting device (such as base station 105) or the receiving device (such as UE 115)) to identify the beam direction that base station 105 will use for later transmission or reception.

[0084] Some signals (such as data signals associated with a receiving device) may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device, such as UE 115). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on the signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signals received by UE 115 with the highest signal quality or other acceptable signal quality.

[0085] In some examples, transmissions performed by a device (e.g., by base station 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate combined beams for transmission (e.g., from base station 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and this feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals that can be precoded or unprecoded (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)). UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify the beam direction used by UE 115 for subsequent transmission or reception) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0086] A receiver device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiver device may attempt multiple receive directions by: receiving via different antenna subarrays; processing received signals according to different antenna subarrays; receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets); or processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as "listening" according to different receive configurations or receive directions. In some examples, the receiver device may use a single receive configuration to receive along a single beam direction (e.g., when a data signal is received). The single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0087] Wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer performs packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer performs priority handling and multiplexing of logical channels into transport channels. The MAC layer can also use error detection, error correction, or both to support MAC layer retransmissions to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of RRC connections between UE 115 and base station 105 or core network 130 supporting user plane data radio bearers. At the physical layer, transport channels can be mapped to physical channels.

[0088] UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Repeat Request (HARQ) feedback is a technique used to increase the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve MAC layer throughput in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device may support simultaneous time-slot HARQ feedback, where the device can provide HARQ feedback in a specific time slot for data received in previous symbols within that time slot. In other cases, the device may provide HARQ feedback in subsequent time slots or according to some other time interval.

[0089] In some scenarios, UE 115 may be able to support multiple subscriptions with multiple SIM cards and therefore may be referred to as a multi-SIM device. For example, UE 115 may support a first subscription with a first SIM and a second subscription with a second SIM. In such examples, UE 115 may be referred to as a dual-subscription device or a dual-SIM device. In some aspects, the first subscription, which can be connected to a first cell, may be in active mode (or active state), and the second subscription, which can be connected to a second cell, may be in idle mode (or idle state). In some scenarios, UE 115 may achieve power savings and throughput gains by initiating a merged state, where UE 115 can use the first cell to perform idle mode measurements (such as receiving paging messages) for the second subscription using the first subscription. In some aspects, if the corresponding SIMs (first SIM and second SIM) belong to the same operator, UE 115 may initiate a merged state including both the first and second subscriptions. Alternatively, if the corresponding SIMs (first SIM and second SIM) belong to different operators but share a radio access network (RAN), UE 115 may initiate a merged state including both the first and second subscriptions. This combined state, including first and second subscriptions, enables greater power gain and increased throughput, allowing UE 115 to achieve multi-SIM throughput key performance indicators (KPIs).

[0090] In some implementations of this disclosure, UE 115 can adjust the continuation, initiation, or both of the merging state between the first subscription and the second subscription based on merging conditions based on channel quality. For example, UE 115 can adjust whether to continue or initiate the merging state between the first subscription and the second subscription based on whether the channel quality associated with the communication link 135 between UE 115 and the first cell (e.g., base station 105) meets a threshold channel quality. In an example where UE 115 determines that the channel quality associated with the communication link 135 fails to meet the threshold channel quality and the first subscription and the second subscription are in a merging state, UE 115 can exit the merging state (e.g., separate the second subscription from the first subscription) and begin using the second subscription and the second cell to perform idle mode measurements for the second subscription (as opposed to using the first subscription and the first cell). Alternatively, in an example where UE 115 determines that the channel quality associated with communication link 135 does not meet the threshold channel quality before initiating the merge state between the first subscription and the second subscription, UE 115 may postpone or otherwise delay the merge state and continue to use the second subscription and the second cell to perform idle mode measurements for the second subscription.

[0091] Figure 2Examples of a wireless communication system 200 supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions are described according to various aspects of this disclosure. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. The wireless communication system 200 may include a base station 105 that can communicate with a UE 115 within a geographic coverage area 110 associated with the base station 105. In some examples, the UE 115 may be a multi-SIM device, such as a dual-SIM device or a dual-subscription device, and may support multiple subscriptions. For example, the UE 115 may support subscription 215 (i.e., SUB 215 or a first subscription, which can be used as a DDS) and subscription 220 (i.e., SUB 220 or a second subscription, which can be used as an nDDS). In some implementations, the UE 115 may adjust the continuation or initiation of the merging state between subscription 215 and subscription 220 according to channel quality-based merging conditions.

[0092] In some aspects, base station 105 can support multiple serving cells. For example, base station 105 can support a first cell with which UE 115 can communicate using subscription 215, and a second cell with which UE 115 can communicate using subscription 220. Alternatively, base station 105 can support a single serving cell, such as either a first cell with which subscription 215 can establish a connection, or a second cell with which subscription 220 can establish a connection, while the other of the first or second cell may be supported by a different base station 105. In some examples, the first and second cells (whether both are supported by base station 105 or by base station 105 and different base stations 105) may belong to the same operator, or they may belong to different operators but have a shared RAN. In such examples, UE 115 can initiate a merge state between subscription 215 and subscription 220 (provided that subscription 215 and subscription 220 can camp on the same serving cell).

[0093] For example, UE 115's subscription 215 can be in an active mode (such as an RRC active state) with a first cell, and UE 115's subscription 220 can be in an idle mode (such as an RRC idle state) with a second cell. Based on entering a merged state including subscriptions 215 and 220, UE 115 can use subscription 215 and the first cell to perform idle mode measurements for subscription 220, such as receiving paging information. For example, if subscription 215 remains in an active mode (e.g., connected mode), UE 115 can use subscription 215 to receive and decode paging for subscription 220. In this merged state, subscriptions 215 and 220 can effectively camp on the same cell, allowing a single protocol stack (e.g., an LTE protocol stack) to be used for both subscriptions 215 and 220, which may occur in some network deployments (such as those of China Mobile (CMCC)). In such an example where UE 115 initiates a merged state between subscription 215 and subscription 220, UE 115 can achieve a power gain (e.g., lower power cost) or a throughput gain or both, enabling UE 115 to achieve a multi-SIM throughput KPI.

[0094] However, in some situations, such as when channel conditions deteriorate between UE 115 and base station 105, this merging state may lead to suboptimal execution of idle mode measurements for subscription 220. For example, the channel quality associated with the communication link 205 on which UE 115 and base station 105 (e.g., the first cell) can exchange signaling 210 may deteriorate (e.g., due to high interference or congestion, and other examples), which may result in a lower likelihood that UE 115 will use subscription 215 and the first cell to receive paging messages or perform various other idle mode measurements for subscription 220. In some respects, a lower likelihood that UE 115 will use subscription 215 to receive paging messages or perform various other idle mode measurements for subscription 220 may adversely affect one or more KPIs of subscription 220.

[0095] In cases of deteriorating channel conditions associated with communication link 205, UE 115 may transmit one or more measurement reports to base station 105. In scenarios with good network deployment, base station 105 may initiate a handover for UE 115 to a different serving cell to avoid RLF (Redirect Life Failure). However, in some scenarios, such as poor network deployment or planning, base station 105 may fail to respond to one or more measurement reports from UE 115 and transmit a handover command to UE 115. In such scenarios, if UE 115 fails to receive a handover command from base station 105 within a threshold time duration, UE 115 may declare an RLF for subscription 215 (e.g., an active or connected subscription).

[0096] When declaring the RLF for subscription 215, UE 115 using subscription 215 can attempt to camp on different cells (e.g., as in a single-SIM device) and can set hysterias timers to avoid immediate decoupling and back-to-back decoupling-and-merging. However, in poorly planned network scenarios, for example, UE 115 may be in a suboptimally planned China Telecom (CT) and China Unicom (CU) RAN shared area, causing subscription 220 to be trapped on a poorer CT cell where there are no other better CT cells nearby (e.g., no other better CT cells with coverage area 110 including UE 115). In some cases, such a suboptimally planned CT+CU RAN shared area can be associated with worse network conditions or connectivity than a RAN-shared CT+CU where no service outage (OOS) has been observed for either subscription 215 or subscription 220. Additionally or alternatively, at the time of declaring an RLF, subscription 215 may remain in active mode (e.g., connected mode) in a 4Rx configuration (e.g., 4×4 MIMO configuration), which may not be suitable for idle occupancy in a 2Rx configuration (e.g., 2×2 MIMO configuration). Thus, when subscription 215 changes from active mode to idle mode, OOS (e.g., could lead to) OOS can be observed.

[0097] Despite poor channel conditions on the communication link 205 between UE 115 and the first cell using subscription 215, subscription 220 can remain merged with subscription 215 until an RLF is declared. Thus, even if there are better cells that subscription 220 might have already connected to before the RLF is declared, subscription 220 may still end up in a poor connectivity scenario where there is a lack of readily available or nearby cells that could provide improved connectivity at the time the RLF for subscription 215 is declared. For example, if subscription 215 and subscription 220 share a RAN (in which case subscription 215 and subscription 220 may or may not belong to the same operator), subscription 220 may remain merged with subscription 215 (which could connect to relatively poor cells) before the RLF due to poor network planning by the operator of subscription 215, even if there are relatively better cells with which subscription 220 could establish a connection. Thus, if UE 115 exits the merged state between subscription 215 and subscription 220 before declaring the RLF of communication link 205 (through which UE 115 can communicate with base station 105 using subscription 215), UE 115 can provide subscription 220 with more seamless idle mode measurement.

[0098] Therefore, in some implementations of this disclosure, UE 115 can adopt a channel quality-based merging condition by measuring the channel quality of the communication link 205 through which UE 115 can communicate with base station 105 (e.g., a first cell) using subscription 215 and determining whether the measured channel quality meets a threshold link quality. In some examples, for instance, subscription 215 and subscription 220 can be in a merged state, where UE 115 can use subscription 215 and the first cell (to which subscription 215 is connected) to perform idle mode measurements for subscription 220, and in an example where UE 115 determines that the measured channel quality fails to meet the threshold channel quality, UE 115 can exit the merged state. Therefore, subscription 220 can be decoupled from subscription 215, and UE 115 can use subscription 220 to perform idle mode measurements for subscription 220. This document (including references) Figure 3 Additional details are described regarding exiting the merging state based on the determination that the channel quality associated with communication link 205 fails to meet the threshold channel quality.

[0099] Similarly, subscriptions 215 and 220 may initially be in a separate state (e.g., not in a merged state), and if UE 115 determines that the measured channel quality fails to meet a threshold channel quality, UE 115 may determine to postpone or otherwise delay initiating a merged state between subscriptions 215 and 220. This document (including references) Figure 4 Additional details are described regarding the postponement or delay of initiating a merge state between subscriptions 215 and 220 based on the determination that the channel quality associated with communication link 205 fails to meet a threshold channel quality.

[0100] Figure 3 Examples of processing timelines 300 supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions, according to various aspects of this disclosure, are described. In some examples, processing timelines 300 may be implemented by UE 115 to implement aspects of wireless communication system 100 or wireless communication system 200. For example, UE 115 may support subscription 305 (i.e., SUB 305 or first subscription, which can be used as a DDS) connected to a first cell in active or idle mode, and subscription 310 (i.e., SUB 310 or second subscription, which can be used as an nDDS) connected to a second cell in idle mode. Subscriptions 305 and 310 may be in a merged state, and, in some implementations, UE 115 may determine to exit the merged state (e.g., separate subscription 310 from subscription 305) based on a threshold channel quality associated with a communication link between UE 115 and the first cell that fails to meet the channel quality associated with channel quality-based merging conditions.

[0101] For example, subscriptions 305 and 310 may initially be in a merged state, where UE 115 can use subscription 305 and the first cell to perform idle mode measurements for subscription 310. In such examples, subscriptions 305 and 310 may be able to camp on the same cell. For example, subscriptions 305 and 310 may be able to communicate using the same RF band. In some implementations of this disclosure, UE 115 may initiate Layer 1 (L1) channel measurements of channel quality associated with the communication link between UE 115 and the first cell. UE 115 may initiate L1 channel quality measurements periodically or based on one or more triggering conditions. In some respects, UE 115 can measure the channel quality associated with the communication link between UE 115 and the first cell, and compare the measured channel quality with a threshold channel quality when subscription 305 is in active or idle mode (e.g., UE 115 can determine whether to continue the merged state or separate from the merged state in an example where both subscriptions are in idle mode or in an example where subscription 305 is in active mode and subscription 310 is in idle mode).

[0102] For example, in 315, UE 115 can measure the channel quality associated with the communication link between UE 115 and the first cell, and can determine that the channel quality fails to meet a channel quality threshold. In the example where UE 115 determines that the channel quality fails to meet the threshold channel quality, UE 115 can determine that it is unlikely that UE 115 will receive a handover command from the base station in response to one or more measurement reports transmitted from UE 115 using subscription 305 (e.g., an active or connected subscription), and accordingly, can determine that RLF is possible. Furthermore, although interpreted as occurring simultaneously with determining that the channel quality fails to meet the threshold channel quality, UE 115 can begin transmitting one or more measurement reports using subscription 305 before or after determining that the channel quality fails to meet the threshold channel quality.

[0103] In some examples, UE 115 may determine that channel quality fails to meet a threshold channel quality based on performing L1 channel measurements, such as measuring filtered reference received power (RSRP) or filtered signal-to-noise ratio (SNR) (e.g., frequency tracking loop (FTL) SNR) or both. In an example where UE 115 measures the filtered RSRP, UE 115 may determine that channel quality fails to meet a threshold channel quality based on determining that the filtered RSRP is below a threshold filtered RSRP value or metric (such as a Thresh_RSRP value) within a first time threshold (TTT) (which may be referred to as TTT1). For example, UE 115 may set TTT1 to equal 640 ms and Thresh_RSRP to equal -105 dBm, such that if UE 115 measures a filtered RSRP less than -105 dBm within 640 ms, UE 115 may determine that channel quality fails to meet a threshold channel quality.

[0104] Additionally or alternatively, UE 115 can measure the filtered SNR and can determine that the channel quality fails to meet the threshold channel quality based on determining that the filtered SNR is below a threshold filtered SNR value or metric (such as the Thresh_SNR value) within a second TTT (which may be referred to as TTT2). For example, UE 115 can set TTT2 to be equal to 640 ms and can set the Thresh_SNR value to be equal to -3 dB or 0 dB, such that if UE 115 measures a filtered SNR less than -3 dB or less than 0 dB within 640 ms, UE 115 can determine that the channel quality fails to meet the threshold channel quality. In some aspects, UE 115 can determine the filtered FTL SNR based on determining the maximum value of the FTL SNR on RX0 / 1 / 2 / 3, which can be represented by the mathematical expression FTL SNR = max{FTL SNR on RX0 / 1 / 2 / 3}.

[0105] Additionally or alternatively, UE 115 may determine that the channel quality fails to meet a threshold channel quality based on consecutive or persistent decoding failures. For example, UE 115 may attempt to decode and perform a CRC on a data channel such as the Physical Downlink Shared Channel (PDSCH), and if UE 115 fails the CRC on the data channel consecutively or persistently, UE 115 may determine that the channel quality fails to meet a threshold channel quality. Such consistent or persistent CRC failures may include or refer to CRC failures exceeding a threshold count or CRC failures occurring at a frequency greater than a threshold, or both. In some aspects, UE 115 may attempt to perform a CRC on the PDSCH using a Radio Network Temporary Identifier (RNTI) (such as a Paging RNTI (P-RNTI)). In such aspects, if UE 115 detects using the P-RNTI that the number of consecutive CRC failures on the PDSCH exceeds a threshold number, UE 115 may determine that the channel quality fails to meet a threshold channel quality. For example, if UE 115 detects N (or more) consecutive CRC failures for PDSCH using P-RNTI, UE 115 can determine that the channel quality fails to meet the threshold channel quality.

[0106] Thus, if UE 115 determines that RSRP or SNR has fallen below the corresponding threshold, or UE 115 has experienced a threshold number of consecutive P-RNTI PDSCH CRC failures, or any combination thereof, then UE 115 can determine that the channel quality has failed to meet the threshold channel quality. In the example where UE 115 determines that the channel quality has failed to meet the threshold channel quality, UE 115's L1 can indicate to UE 115's RRC protocol that the conditions for separation from the merging state (i.e., the merging conditions based on channel quality) have been met.

[0107] Therefore, at 320, UE 115 may exit the merged state based on failure to meet the threshold channel quality. In some examples, UE 115's RRC protocol may trigger exit from the merged state based on an indication received from UE 115's L1 that the conditions for separation from the merged state have been met. Furthermore, although shown as occurring at a separate instance on processing timeline 300, UE 115 may determine at 315 that the channel quality has failed to meet the threshold channel quality and separate subscription 310 from subscription 305 at approximately the same time. For example, UE 115's RRC protocol may trigger the separation shown at 320 immediately after determining at 315 that the channel quality has failed to meet the threshold channel quality.

[0108] In some examples, UE 115 may additionally initiate (i.e., start) timer 325 at 320 based on the UE exiting the merge state. In some aspects, UE 115 may initiate timer 325 (which may be referred to as a hysteresis timer, such as T_hyst_merge or T_hyst_split) to postpone or otherwise delay any future attempts to re-enter the merge state. In other words, UE 115 may suppress attempts to re-enter the merge state before timer 325 expires or terminates. In some aspects, timer 325 may be equal to 1 second.

[0109] At 330, in some implementations, UE 115 may determine that during this period, UE 115 transmitted one or more measurement reports to base station 105 using subscription 305, and a threshold time elapsed before a handover command was received from the base station in response to the one or more measurement reports. Therefore, UE 115 may declare an RLF for subscription 305. Subscription 305 may then terminate its connection with the first cell and attempt to reconnect to another serving cell. Although shown as potentially occurring before 335 (when UE 115 can determine whether to re-enter the merging state), UE 115 may alternatively declare an RLF after 335 or may suppress the declaration of an RLF (e.g., channel conditions may improve or UE 115 may have received a handover command before 330). Furthermore, based on the techniques described herein, UE 115 may declare an RLF for subscription 305 without adversely affecting subscription 310 (e.g., subscription 310 may have previously separated from subscription 305 according to channel quality-based merging conditions).

[0110] At 335, UE 115 can determine that timer 325 has expired or can terminate timer 325. In the example where UE 115 terminates timer 325, UE 115 can determine that UE 115 has established a connection with a third cell (e.g., a new cell) using subscription 305, and can terminate timer 325 based on the determination that UE 115 has established a connection with the third cell using subscription 305. In such an example, UE 115 can measure the channel quality associated with the communication link between UE 115 and the third cell. Alternatively, UE 115 can determine at 330 that timer 325 has expired. If UE 115 determines that timer 325 has expired, UE 115 can measure (e.g., remeasure) the channel quality associated with the communication link between UE 115 and the first cell. In either example (e.g., whether UE 115 terminates timer 325 or determines that timer 325 has expired), UE 115 can determine whether the measured (or remeasured) channel quality meets the threshold channel quality.

[0111] Similarly, UE 115 can determine whether to re-enter the merging state based on whether the measured channel quality meets a threshold channel quality. For example, in an example where UE 115 determines that the measured channel quality meets the threshold channel quality, UE 115 can determine to re-enter the merging state. Alternatively, in an example where UE 115 determines that the measured channel quality fails to meet the threshold channel quality, UE 115 can suppress re-entry into the merging state (e.g., subscriptions 305 and 310 may remain separate after 335). This document (including references) Figure 4 Additional details are described regarding how UE 115 adopts channel quality-based merging conditions after determining that the criteria for entering or re-entering the merging state are met (e.g., the termination or expiration of timer 325, RRC protocol triggering, etc.).

[0112] Figure 4 Examples of processing timelines 400 supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions, according to various aspects of this disclosure, are described. In some examples, processing timelines 400 may be implemented by UE 115 to implement aspects of wireless communication system 100 or wireless communication system 200. For example, UE 115 may support subscription 405 (i.e., SUB 405 or first subscription, which can be used as a DDS) connected to a first cell in active or idle mode, and subscription 410 (i.e., SUB 410 or second subscription, which can be used as an nDDS) connected to a second cell in idle mode. In some aspects, subscriptions 405 and 410 may be in a separate state (e.g., not in a merged state), UE 115 may determine that criteria for entering a merged state are met, and UE 115 may determine whether to enter a merged state or delay initiating a merged state based on whether the channel quality associated with the communication link between UE 115 and the first cell meets a threshold channel quality associated with channel quality-based merging conditions. In some respects, the threshold channel quality used to delay initiating the merging state can be the same as the threshold channel quality used to exit the merging state.

[0113] For example, subscriptions 405 and 410 can initially be in a separate state, where UE 115 can use subscription 410 and the second cell to perform idle mode measurements for subscription 410. In some cases, UE 115 can determine that criteria for entering a merged state are met, in which UE 115 can use subscription 405 and the first cell to perform idle mode measurements for subscription 410. Such criteria may include subscriptions 410 and 405 being able to camp on the first cell, RRC-triggered merging (e.g., RRC-triggered forced merging), or timer T_hyst_merge (such as timer 325, e.g., ...). Figure 3 The expiration or termination of the term (as shown). In some implementations of this disclosure, UE 115 may initiate an L1 channel measurement of the channel quality associated with the communication link between UE 115 and the first cell based on the satisfaction of the criteria for determining entry into the merging state. For example, UE 115's RRC protocol may call the L1 application programming interface (API) to check the channel quality of the currently serving cell.

[0114] For example, at 415, UE 115 can measure the channel quality associated with the communication link between UE 115 and the first cell, and in some cases can determine that the channel quality fails to meet a channel quality threshold. In some examples, UE 115 can determine that the channel quality fails to meet the threshold channel quality based on performing L1 channel measurements (such as measuring filtered RSRP or filtered SNR (e.g., FTL SNR) or both). In some aspects, UE 115 can measure the channel quality associated with the communication link between UE 115 and the first cell, and compare the measured channel quality with the threshold channel quality when subscription 405 is in active or idle mode (e.g., UE 115 can determine whether to enter a merging state or postpone entering a merging state in an example where both subscriptions are in idle mode or in an example where subscription 405 is in active mode and subscription 410 is in idle mode).

[0115] In the example of UE 115 measuring filtered RSRP, UE 115 can determine that the channel quality fails to meet the threshold channel quality based on determining that the filtered RSRP is below a threshold filtered RSRP value or metric (such as the Thresh_RSRP value) within a first TTT (which may be referred to as TTT1). For example, UE 115 can set TTT1 to equal 640 ms and the Thresh_RSRP value to equal -105 dBm, such that if UE 115 measures a filtered RSRP less than -105 dBm within 640 ms, UE 115 can determine that the channel quality fails to meet the threshold channel quality.

[0116] Additionally or alternatively, UE 115 can measure the filtered SNR and can determine that the channel quality fails to meet the threshold channel quality based on determining that the filtered SNR is below a threshold filtered SNR value or metric (such as the Thresh_SNR value) within a second TTT (which may be referred to as TTT2). For example, UE 115 can set TTT2 to equal 640 ms and Thresh_SNR to equal -3 dB, such that if UE 115 measures a filtered SNR less than -3 dB within 640 ms, UE 115 can determine that the channel quality fails to meet the threshold channel quality. In some aspects, UE 115 can determine the filtered FTL SNR based on determining the maximum value of the FTL SNR on RX0 / 1 / 2 / 3, which can be represented by the mathematical expression FTLSNR = max{FTL SNR on RX0 / 1 / 2 / 3}.

[0117] Additionally or alternatively, UE 115 may determine that the channel quality fails to meet a threshold channel quality based on consecutive or persistent decoding failures. For example, UE 115 may attempt to decode and perform CRC on a data channel such as PDSCH, and if UE 115 fails CRC on the data channel consecutively or persistently, UE 115 may determine that the channel quality fails to meet the threshold channel quality. Such consistent or persistent CRC failures may include or refer to CRC failures exceeding a threshold count or CRC failures occurring at a frequency greater than the threshold, or both. In some aspects, UE 115 may attempt to perform CRC on PDSCH using RNTI (such as P-RNTI). In such aspects, if UE 115 detects that the number of consecutive CRC failures on PDSCH using P-RNTI exceeds a threshold number, UE 115 may determine that the channel quality fails to meet the threshold channel quality. For example, if UE 115 detects N (or more) consecutive CRC failures on PDSCH using P-RNTI, UE 115 may determine that the channel quality fails to meet the threshold channel quality.

[0118] Thus, if UE 115 determines that RSRP or SNR has fallen below the corresponding threshold, or UE 115 has experienced a threshold number of consecutive P-RNTI PDSCH CRC failures, or any combination thereof, then UE 115 can determine that the channel quality has failed to meet the threshold channel quality. In an example where UE 115 determines that the channel quality has failed to meet the threshold channel quality, UE 115's L1 can indicate to UE 115's RRC protocol that the conditions for delaying the initiation of the merge state (i.e., the merge conditions based on channel quality) have been met. In some examples, the RRC protocol can initiate (i.e., start) timer 420 based on determining that the conditions for delaying the initiation of the merge state have been met. This timer can be referred to as a hysteresis timer, such as T_hyst_merge or T_hyst_split. In such examples, UE 115 can suppress attempts to re-enter the merge state before timer 420 expires or terminates. In some aspects, timer 420 can be equal to 1 second. In some respects, if the DDS (e.g., subscription 405) is in an idle state or mode while timer 420 is running (e.g., before a forced merging associated with the expiration of timer 420), UE 115 may trigger a DDS cell reselection search and measurement. In such respects, UE 115 may search for and measure (e.g., measure reference signals) associated with one or more other cells (e.g., neighboring cells), and in some cases, may attempt to establish a connection with the measured cell of the DDS (e.g., if the measured cell is associated with a threshold channel quality).

[0119] At 425, in some aspects, the channel quality associated with the communication link between UE 115 and the serving cell can be improved such that the channel quality meets a threshold channel quality during the operation of timer 420. For example, in some examples, UE 115 can maintain a connection with the first cell, and the channel quality associated with the communication link between UE 115 and the first cell can improve over time, such that at 425, the channel quality becomes sufficiently high to meet the threshold channel quality associated with the merging conditions based on channel quality. In some other examples, UE 115 can establish a connection with a third cell (e.g., a new cell) using subscription 405, and the channel quality of the communication link between UE 115 and the third cell can meet the threshold channel quality.

[0120] At 430, UE 115 can determine that timer 420 has expired or can terminate timer 420. For example, UE 115 can terminate timer 420 based on determining that UE 115 has established a connection with a third cell. In such an example, UE 115 can measure the channel quality associated with the communication link between UE 115 and the third cell. Alternatively, in the example where UE 115 maintains a connection with the first cell, UE 115 can determine that timer 420 has expired, and based on determining that timer 420 has expired, UE 115 can measure (e.g., remeasure) the channel quality associated with the communication link between UE 115 and the first cell upon the expiration of timer 420. In either example (e.g., whether UE 115 terminates timer 420 or determines that timer 420 has expired), UE 115 can determine whether the measured (or remeasured) channel quality meets a threshold channel quality (and may check the corresponding forced merging conditions).

[0121] Similarly, UE 115 can determine whether to enter a merging state based on whether the measured channel quality meets a threshold channel quality. For example, in an example where UE 115 determines that the measured channel quality fails to meet the threshold channel quality, UE 115 can suppress entry into the merging state at 430 (e.g., subscriptions 405 and 410 can remain separate after 430). Alternatively, in an example where UE 115 determines that the measured channel quality meets the threshold channel quality (e.g., determining that both RSRP and SNR measurements meet their respective threshold channel quality), such as... Figure 4 As shown, UE 115 can check the S-criteria of subscription 410 against subscription 405, and determine whether subscription 410 can camp on the serving cell to which UE 115 connects using subscription 405 (e.g., whether subscription 405 and subscription 410 can communicate on the same RF band or support the same RF band). If UE 115 determines that the S-criteria is passed and subscription 410 can camp on the serving cell, then UE 115's RRC protocol can trigger entry into a merging state (e.g., forced merging can be triggered).

[0122] Figure 5 A block diagram 500 of a device 505 supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions is shown according to various aspects of this disclosure. Device 505 may be an example of various aspects of UE 115 as described herein. Device 505 may include a receiver 510, a communications manager 515, and a transmitter 520. Device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0123] Receiver 510 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions). This information can be transmitted to other components of device 505. Receiver 510 can be a reference... Figure 8 Examples of various aspects of the transceiver 820 described. The receiver 510 may utilize a single antenna or a set of antennas.

[0124] In some implementations, the communication manager 515 may identify that the UE's first subscription and the first cell are in an active mode; identify that the UE's second subscription and the second cell are in an idle mode; identify the UE's first operating mode, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; exiting the first operating mode based on a failure to meet a threshold channel quality; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; and performing the idle mode measurement for the second subscription using the second subscription based on the UE exiting the first operating mode.

[0125] Additionally or alternatively, the communication manager 515 may identify that the UE's first subscription and the first cell are in an active mode; identify that the UE's second subscription and the second cell are in an idle mode; determine that criteria for entering a first operating mode are met, in which the UE uses the first subscription to perform idle mode measurements for the second subscription; postpone initiating the first operating mode based on failure to meet a threshold channel quality; and determine that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality. The communication manager 515 may be an example of aspects of the communication manager 810 described herein.

[0126] The communication manager 515 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functionality of the communication manager 515 or its sub-components may be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0127] The communication manager 515 or its subcomponents may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 515 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 515 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0128] Transmitter 520 can transmit signals generated by other components of device 505. In some examples, transmitter 520 may be co-located with receiver 510 in a transceiver assembly. For example, transmitter 520 may be a reference... Figure 8 Examples of various aspects of the transceiver 820 described. The transmitter 520 may utilize a single antenna or an antenna set.

[0129] In some examples, the communication manager 515 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 510 and transmitter 520 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled to the mobile device modem to enable wireless transmission and reception over one or more frequency bands.

[0130] The communication manager 515 can be implemented to achieve one or more potential advantages. In some implementations, the communication manager 515 can determine whether to exit or postpone initiating the merging state of the first and second subscriptions based on merging conditions based on channel quality. Thus, the communication manager 515 can avoid unnecessary long durations that might lead to suboptimal execution of idle mode measurements for the second subscription, or avoid trapping the second subscription in poor connectivity scenarios, as described in [reference 1]. Figure 2 A more detailed description follows. Therefore, the Communications Manager 515 can provide more seamless coverage for paging messages for second subscriptions and various other idle mode measurements.

[0131] Furthermore, by employing a timer to delay any attempt to enter (or re-enter) the merged state, the communication manager 515 can potentially increase the power savings and battery life of the device 505 by reducing the number of back-to-back merge-then-dissolve scenarios in which the first and second subscriptions of the communication manager 515 can oscillate and exit in the merged state.

[0132] Figure 6A block diagram 600 of device 605, according to various aspects of this disclosure, is shown, supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based merging conditions. Device 605 may be an example of aspects of device 505 or UE 115 as described herein. Device 605 may include a receiver 610, a communications manager 615, and a transmitter 640. Device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0133] Receiver 610 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions). The information can be transmitted to other components of device 605. Receiver 610 can be a reference... Figure 8 Examples of various aspects of the transceiver 820 described. The receiver 610 may utilize a single antenna or a set of antennas.

[0134] Communication manager 615 may be an example of aspects of communication manager 515 as described herein. Communication manager 615 may include subscription component 620, operation mode component 625, merge condition component 630, and idle mode measurement component 635. Communication manager 615 may be an example of aspects of communication manager 810 as described herein.

[0135] In some implementations, the communication manager 615 can operate to exit the merging state based on merging conditions based on channel quality. The subscription component 620 can identify that the UE's first subscription and the first cell are in active mode; and identify that the UE's second subscription and the second cell are in idle mode. The operating mode component 625 can identify the UE's first operating mode, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; and exiting the first operating mode based on failure to meet a threshold channel quality. The merging condition component 630 can determine that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality. The idle mode measurement component 635 can perform the idle mode measurement for the second subscription using the second subscription based on the UE exiting the first operating mode.

[0136] Additionally or alternatively, the communication manager 615 is operable to postpone the initiation of a merging state based on merging conditions based on channel quality. The subscription component 620 can identify that the UE's first subscription and the first cell are in active mode; and identify that the UE's second subscription and the second cell are in idle mode. The operation mode component 625 can determine that criteria for entering a first operation mode are met, in which the UE uses the first subscription to perform idle mode measurements for the second subscription; and postpone the initiation of the first operation mode based on the failure to meet the threshold channel quality. The merging condition component 630 can determine that the first channel quality associated with the first communication link between the UE and the first cell fails to meet the threshold channel quality.

[0137] Transmitter 640 can transmit signals generated by other components of device 605. In some examples, transmitter 640 may be co-located with receiver 610 in a transceiver assembly. For example, transmitter 640 may be a reference... Figure 8 Examples of various aspects of the transceiver 820 described. The transmitter 640 may utilize a single antenna or an antenna set.

[0138] Figure 7 A block diagram 700 of a communication manager 705, according to various aspects of this disclosure, is shown for a technique to enhance paging sharing of dual-subscription devices using channel quality-based merging conditions. The communication manager 705 may be an example of aspects of the communication manager 515, communication manager 615, or communication manager 810 described herein. The communication manager 705 may include a subscription component 710, an operation mode component 715, a merging condition component 720, an idle mode measurement component 725, a timer component 730, and a connection component 735. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0139] In some implementations, the communication manager 705 can be operated to exit the merging state based on merging conditions based on channel quality.

[0140] The subscription component 710 can identify that the UE's first subscription and the first cell are in active mode. In some examples, the subscription component 710 can identify that the UE's second subscription and the second cell are in idle mode. In some cases, the first subscription is the default data subscription, and the second subscription is a non-default data subscription.

[0141] The operation mode component 715 can identify a first operation mode of the UE, wherein the first operation mode includes performing idle mode measurements for the second subscription using the first subscription. In some examples, the operation mode component 715 can exit the first operation mode based on failure to meet a threshold channel quality. In some examples, the operation mode component 715 can determine whether to re-enter the first operation mode based on whether the second channel quality meets the threshold channel quality.

[0142] In some examples, the operation mode component 715 may determine whether to re-enter the first operation mode based on whether the first channel quality meets the threshold channel quality. In some examples, the operation mode component 715 may exit the first operation mode based on a radio resource control protocol trigger, wherein the radio resource control protocol trigger is activated based on the failure to meet the threshold channel quality. The merging condition component 720 may determine that the first channel quality associated with the first communication link between the UE and the first cell fails to meet the threshold channel quality.

[0143] In some examples, the merging condition component 720 may determine whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality. In some examples, the merging condition component 720 may determine whether the first channel quality associated with the first communication link between the UE and the first cell meets the threshold channel quality. In some cases, failure to meet the threshold channel quality includes failure to meet the channel quality-based merging condition associated with the first operating mode. In some cases, the first channel quality includes RSRP or SNR. In some examples, the merging condition component 720 may detect a threshold number of consecutive CRC failures associated with the data channel of the first communication link based on P-RNTI, wherein failure to meet the threshold channel quality is at least partially based on the detection of the threshold number of consecutive CRC failures associated with the data channel.

[0144] The idle mode measurement component 725 can perform the idle mode measurement for the second subscription based on the UE exiting the first operating mode.

[0145] The timer component 730 may initiate a timer based on the UE exiting the first operating mode, wherein the idle mode measurement for the second subscription is performed using the second subscription for at least the duration of the timer. In some examples, the timer component 730 may terminate the timer based on establishing a connection with the third cell using the first subscription. In some examples, the timer component 730 may determine that the timer has expired.

[0146] The connection component 735 can determine during the duration of the timer that the UE uses the first subscription to establish a connection with the third cell.

[0147] Additionally or alternatively, the communication manager 705 is operable to postpone the initiation of a merging state based on merging conditions based on channel quality.

[0148] In some examples, the subscription component 710 may identify that the UE's first subscription and the first cell are in an active mode. In some examples, the subscription component 710 may identify that the UE's second subscription and the second cell are in an idle mode. In some examples, the subscription component 710 may determine that the second subscription can use the first cell to operate in the first operating mode together with the first subscription, wherein determining that the criteria for entering the first operating mode are met is based on determining that the second subscription can use the first cell to operate in the first operating mode together with the first subscription. In some cases, the first subscription is a default data subscription, and the second subscription is a non-default data subscription.

[0149] In some examples, the operation mode component 715 may determine that criteria for entering a first operation mode are met, wherein the UE uses the first subscription to perform idle mode measurements for the second subscription. In some examples, the operation mode component 715 may postpone initiation of the first operation mode based on failure to meet a threshold channel quality. In some examples, the merging condition component 720 may determine that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality.

[0150] In some examples, the operation mode component 715 may determine that the initiation of the first operation mode has been triggered by the UE's radio resource control protocol. In some examples, the operation mode component 715 may determine whether to initiate the first operation mode based on whether the second channel quality meets the threshold channel quality. In some examples, the operation mode component 715 may determine whether to initiate the first operation mode based on whether the first channel quality meets the threshold channel quality.

[0151] In some examples, the merging condition component 720 may determine whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality. In some examples, the merging condition component 720 may determine whether the first channel quality associated with the first communication link between the UE and the first cell meets the threshold channel quality. In some cases, failure to meet the threshold channel quality includes failure to meet the channel quality-based merging condition associated with the first operating mode. In some cases, the first channel quality includes RSRP or SNR. In some examples, the merging condition component 720 may detect a threshold number of consecutive CRC failures associated with the data channel of the first communication link based on P-RNTI, wherein failure to meet the threshold channel quality is at least partially based on the detection of the threshold number of consecutive CRC failures associated with the data channel.

[0152] In some examples, timer component 730 may initiate a timer based on failure to meet the threshold channel quality, wherein the initiation of the first operating mode is postponed for at least the duration of the timer. In some examples, timer component 730 may terminate the timer based on establishing a connection with the third cell using the first subscription. In some examples, timer component 730 may determine that the timer has expired.

[0153] In some examples, the connectivity component 735 may determine during the duration of the timer that the UE is using the first subscription to establish a connection with a third cell. In some examples, the subscription component 710 may identify that the UE's first subscription has switched to an idle mode with the first cell. In some examples, the connectivity component 735 may initiate cell reselection and measurement for the first subscription.

[0154] Figure 8 A diagram of a system 800 including device 805 supporting techniques for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions is shown according to various aspects of this disclosure. Device 805 may be an example of device 505, device 605, or UE 115 as described herein, or a component including the aforementioned devices. Device 805 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 810, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may be in electronic communication via one or more buses (e.g., bus 845).

[0155] In some implementations, the communication manager 810 may identify that the UE's first subscription and the first cell are in an active mode; identify that the UE's second subscription and the second cell are in an idle mode; identify the UE's first operating mode, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; exiting the first operating mode based on failure to meet a threshold channel quality; determining that a first channel quality associated with a first communication link between the UE and the first cell fails to meet a threshold channel quality; and performing the idle mode measurement for the second subscription using the second subscription based on the UE exiting the first operating mode.

[0156] Additionally or alternatively, the communication manager 810 may identify that the UE's first subscription and the first cell are in an active mode; identify that the UE's second subscription and the second cell are in an idle mode; determine that the criteria for entering a first operating mode are met, wherein the UE uses the first subscription to perform an idle mode measurement for the second subscription; postpone the initiation of the first operating mode based on the failure to meet a threshold channel quality; and determine that the first channel quality associated with the first communication link between the UE and the first cell fails to meet the threshold channel quality.

[0157] I / O controller 815 manages the input and output signals of device 805. I / O controller 815 can also manage peripheral devices not integrated into device 805. In some cases, I / O controller 815 may represent a physical connection or port to an external peripheral device. In some cases, I / O controller 815 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX®, or another known operating system. In other cases, I / O controller 815 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, I / O controller 815 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I / O controller 815 or via hardware components controlled by I / O controller 815.

[0158] Transceiver 820 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, transceiver 820 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 820 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0159] In some cases, a wireless device may include a single antenna 825. However, in other cases, the device may have more than one antenna 825, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0160] Memory 830 may include random access memory (RAM) and read-only memory (ROM). Memory 830 may store computer-readable, computer-executable code 835, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 830 may particularly include a basic I / O system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0161] Processor 840 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, central processing units (CPUs), microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 840 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 840. Processor 840 may be configured to execute computer-readable instructions stored in memory (e.g., memory 830) to cause device 805 to perform various functions (e.g., supporting various functions or tasks for techniques to enhance paging sharing of dual-subscription devices using channel quality-based combining conditions).

[0162] Code 835 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 835 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 835 may not be directly executed by processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0163] Figure 9 A flowchart illustrating a method 900 for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions is shown, according to various aspects of this disclosure. Operation of method 900 may be implemented by a UE 115 or its components as described herein. For example, operation of method 900 may be implemented by, as referred to... Figures 5 to 8 The described communication manager is used to perform these functions. In some examples, the UE can execute a set of instructions to control the UE's functional elements to perform the functions described herein. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described herein.

[0164] At point 905, the UE can identify that its first subscription and first cell are in active mode. The operation of point 905 can be performed according to the methods described herein. In some examples, aspects of the operation of point 905 can be determined by referring to... Figures 5 to 8 The described subscription component is used to execute this.

[0165] At point 910, the UE can identify that its second subscription and second cell are in idle mode. The operation of point 910 can be performed according to the methods described herein. In some examples, aspects of the operation of point 910 can be determined by referring to... Figures 5 to 8 The described subscription component is used to execute this.

[0166] At 915, the UE may identify a first operating mode of the UE, wherein the first operating mode includes performing idle mode measurements for the second subscription using the first subscription. The operation of 915 may be performed according to the methods described herein. In some examples, aspects of the operation of 915 may be derived from, as referenced... Figures 5 to 8 The described operation mode components are used to execute.

[0167] At point 920, the UE may determine that the first channel quality associated with the first communication link between the UE and the first cell fails to meet a threshold channel quality. The operation at point 920 may be performed according to the method described herein. In some examples, aspects of the operation at point 920 may be determined by reference to... Figures 5 to 8 The described merging condition components are used for execution.

[0168] At point 925, the UE can exit the first operating mode based on failure to meet the threshold channel quality. The operation at point 925 can be performed according to the methods described herein. In some examples, aspects of the operation at point 925 can be determined by referring to... Figures 5 to 8 The described operation mode components are used to execute.

[0169] At 930, the UE can exit the first operating mode to perform the idle mode measurement for the second subscription. The operation at 930 can be performed according to the methods described herein. In some examples, aspects of the operation at 930 can be determined by referring to... Figures 5 to 8 The idle mode measurement component is described and executed.

[0170] Figure 10 A flowchart illustrating a method 1000 for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions is shown, according to various aspects of this disclosure. Operation of method 1000 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1000 may be implemented by, as referred to... Figures 5 to 8The described communication manager is used to perform these functions. In some examples, the UE can execute a set of instructions to control the UE's functional elements to perform the functions described herein. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described herein.

[0171] At point 1005, the UE can identify that its first subscription and first cell are in active mode. The operation at point 1005 can be performed according to the methods described herein. In some examples, aspects of the operation at point 1005 can be determined by referring to... Figures 5 to 8 The described subscription component is used to execute this.

[0172] At point 1010, the UE can identify that its second subscription and second cell are in idle mode. The operation of point 1010 can be performed according to the methods described herein. In some examples, aspects of the operation of point 1010 can be determined by referring to... Figures 5 to 8 The described subscription component is used to execute this.

[0173] At point 1015, the UE may identify a first operating mode of the UE, wherein the first operating mode includes performing idle mode measurements for the second subscription using the first subscription. The operation of point 1015 may be performed according to the methods described herein. In some examples, aspects of the operation of point 1015 may be derived from, as referenced... Figures 5 to 8 The described operation mode components are used to execute.

[0174] At point 1020, the UE may determine that the first channel quality associated with the first communication link between the UE and the first cell fails to meet a threshold channel quality. The operation of point 1020 may be performed according to the method described herein. In some examples, aspects of the operation of point 1020 may be determined by reference to... Figures 5 to 8 The described merging condition components are used for execution.

[0175] At point 1025, the UE can exit the first operating mode based on failure to meet the threshold channel quality. The operation at point 1025 can be performed according to the methods described herein. In some examples, aspects of the operation at point 1025 can be derived from, as referenced... Figures 5 to 8 The described operation mode components are used to execute.

[0176] At point 1030, the UE can initiate a timer based on the UE exiting the first operating mode. In some examples, the idle mode measurement for the second subscription is performed using the second subscription for at least the duration of the timer. The operation of point 1030 can be performed according to the methods described herein. In some examples, aspects of the operation of point 1030 can be determined by referring to... Figures 5 to 8 The timer component described is used to execute this.

[0177] At point 1035, the UE can exit the first operating mode to perform the idle mode measurement for the second subscription. The operation of point 1035 can be performed according to the methods described herein. In some examples, aspects of the operation of point 1035 can be derived from, as referenced... Figures 5 to 8 The idle mode measurement component is described and executed.

[0178] Figure 11 A flowchart illustrating a method 1100 for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions is shown, according to various aspects of this disclosure. Operation of method 1100 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1100 may be implemented by, as described in reference... Figures 5 to 8 The described communication manager is used to perform these functions. In some examples, the UE can execute a set of instructions to control the UE's functional elements to perform the functions described herein. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described herein.

[0179] At point 1105, the UE can identify that its first subscription and first cell are in active mode. The operation at point 1105 can be performed according to the methods described herein. In some examples, aspects of the operation at point 1105 can be determined by referring to... Figures 5 to 8 The described subscription component is used to execute this.

[0180] At 1110, the UE can identify that its second subscription and second cell are in idle mode. The operation of 1110 can be performed according to the methods described herein. In some examples, aspects of the operation of 1110 can be determined by referring to... Figures 5 to 8 The described subscription component is used to execute this.

[0181] At 1115, the UE can determine that the criteria for entering a first operating mode are met, wherein the UE uses the first subscription to perform idle mode measurements for the second subscription. The operation at 1115 can be performed according to the methods described herein. In some examples, aspects of the operation at 1115 can be determined by referring to... Figures 5 to 8 The described operation mode components are used to execute.

[0182] At 1120, the UE may determine that the first channel quality associated with the first communication link between the UE and the first cell fails to meet a threshold channel quality. The operation at 1120 may be performed according to the method described herein. In some examples, aspects of the operation at 1120 may be determined by reference to... Figures 5 to 8 The described merging condition components are used for execution.

[0183] At point 1125, the UE may postpone initiating the first operating mode based on the failure to meet the threshold channel quality. The operation at point 1125 can be performed according to the methods described herein. In some examples, aspects of the operation at point 1125 may be as described in reference... Figures 5 to 8 The described operation mode components are used to execute.

[0184] Figure 12 A flowchart illustrating a method 1200 for enhancing paging sharing of dual-subscription devices using channel quality-based combining conditions is shown, according to various aspects of this disclosure. Operation of method 1200 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1200 may be implemented by, as referred to... Figures 5 to 8 The described communication manager is used to perform these functions. In some examples, the UE can execute a set of instructions to control the UE's functional elements to perform the functions described herein. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described herein.

[0185] At point 1205, the UE can identify that its first subscription and first cell are in active mode. The operation at point 1205 can be performed according to the methods described herein. In some examples, aspects of the operation at point 1205 can be determined by referring to... Figures 5 to 8 The described subscription component is used to execute this.

[0186] At 1210, the UE can identify that its second subscription and second cell are in idle mode. The operation of 1210 can be performed according to the methods described herein. In some examples, aspects of the operation of 1210 can be derived from, as referenced... Figures 5 to 8 The described subscription component is used to execute this.

[0187] At 1215, the UE can determine that the criteria for entering a first operating mode are met, in which the UE uses the first subscription to perform idle mode measurements for the second subscription. The operation of 1215 can be performed according to the methods described herein. In some examples, aspects of the operation of 1215 can be derived from, as referenced... Figures 5 to 8 The described operation mode components are used to execute.

[0188] At 1220, the UE may determine that the first channel quality associated with the first communication link between the UE and the first cell fails to meet a threshold channel quality. The operation of 1220 may be performed according to the method described herein. In some examples, aspects of the operation of 1220 may be determined by reference to... Figures 5 to 8 The described merging condition components are used for execution.

[0189] At point 1225, the UE may postpone initiating the first operating mode based on the failure to meet the threshold channel quality. The operation at point 1225 can be performed according to the methods described herein. In some examples, aspects of the operation at point 1225 may be as described in reference... Figures 5 to 8 The described operation mode components are used to execute.

[0190] At 1230, the UE may initiate a timer based on the failure to meet the threshold channel quality. In some examples, the initiation of this first operating mode is delayed for at least the duration of the timer. The operation at 1230 can be performed according to the methods described herein. In some examples, aspects of the operation at 1230 may be determined by reference to... Figures 5 to 8 The timer component described is used to execute this.

[0191] It should be noted that the methods described in this paper describe possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are also possible. Furthermore, aspects from two or more methods can be combined.

[0192] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein can also be applied to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described can be applied to a variety of other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0193] The information and signals described herein can be represented using any of a wide variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof.

[0194] The various illustrative boxes and components described herein can be implemented or executed using a general-purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a DSP core, or any other such example).

[0195] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed such that different parts of the function are implemented at different physical locations.

[0196] Computer-readable media includes both non-transitory computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Non-transitory storage media can be any available medium accessible to a general-purpose or special-purpose computer. By way of example and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Similarly, any connection is also legitimately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then such coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable media. As used in this article, disk and disc include CDs, laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks often magnetically reproduce data while discs optically reproduce data using lasers. Combinations of these media are also included within the scope of computer-readable media.

[0197] As used herein (including in the claims), the word "or" in an enumeration of items (e.g., an enumeration of items accompanied by phrases such as "at least one of" or "one or more of") indicates an inclusive enumeration, such that an enumeration of at least one of, for example, A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0198] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, components of the same type may be distinguished by a dash following the reference numeral and a second reference numeral used to differentiate between similar components. If only the first reference numeral is used in the description, the description may apply to any of the similar components having the same first reference numeral, regardless of the second reference numeral or other subsequent reference numerals.

[0199] This description, illustrated in conjunction with the accompanying drawings, describes examples but does not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not mean "superior to" or "outperforming" other examples. This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0200] The description provided herein is intended to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the universal principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for performing wireless communication at a user equipment (UE), comprising: The UE's first subscription and the first cell are in active mode; The second subscription of the UE and the second cell are in idle mode; Identify a first operating mode of the UE, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; The first channel quality associated with the first communication link between the UE and the first cell was determined to have failed to meet the threshold channel quality. The first operating mode may be exited at least in part based on the failure to meet the threshold channel quality. as well as The idle mode measurement for the second subscription is performed using the second subscription, at least in part, based on the UE exiting the first operating mode.

2. The method of claim 1, further comprising: The timer is started at least in part based on the UE exiting the first operating mode, wherein the idle mode measurement for the second subscription is performed using the second subscription during at least the duration of the timer.

3. The method of claim 2, further comprising: During the duration of the timer, it is determined that the UE uses the first subscription to establish a connection with the third cell; The timer is terminated at least in part based on the connection established with the third cell using the first subscription; Determine whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality. as well as Whether to re-enter the first operating mode is determined at least in part based on whether the second channel quality meets the threshold channel quality.

4. The method of claim 2, further comprising: Determine that the timer has expired; Determine whether the first channel quality associated with the first communication link between the UE and the first cell meets the threshold channel quality; as well as Whether to re-enter the first operating mode is determined at least in part based on whether the first channel quality meets the threshold channel quality.

5. The method of claim 1, wherein exiting the first operation mode includes: The first operating mode is exited at least in part based on a Radio Resource Control Protocol (RRC) trigger, wherein the RRC trigger is activated at least in part based on a failure to meet the threshold channel quality.

6. The method of claim 1, further comprising: The threshold number of consecutive cyclic redundancy check (CRC) faults associated with the data channel of the first communication link is detected at least in part based on the paging radio network temporary identifier (P-RNTI), wherein the failure to meet the threshold channel quality is at least in part based on the threshold number of consecutive CRC faults detected associated with the data channel.

7. The method of claim 1, wherein failure to meet the threshold channel quality includes failure to meet the channel quality-based combining conditions associated with the first operating mode.

8. The method of claim 1, wherein the first channel quality includes the reference signal received power or the signal-to-noise ratio.

9. The method of claim 1, wherein the first subscription is a default data subscription and the second subscription is a non-default data subscription.

10. A method for performing wireless communication at a user equipment (UE), comprising: The UE's first subscription and the first cell are in active mode; The second subscription of the UE and the second cell are in idle mode; The criteria for entering the first operating mode are determined, wherein the UE performs an idle mode measurement for the second subscription using the first subscription; The first channel quality associated with the first communication link between the UE and the first cell was determined to have failed to meet the threshold channel quality. as well as The activation of the first operating mode is postponed, at least in part, based on the failure to meet the threshold channel quality.

11. The method of claim 10, further comprising: The timer is started at least in part based on the failure to meet the threshold channel quality, wherein the start of the first operating mode is delayed for at least the duration of the timer.

12. The method of claim 11, further comprising: The first subscription of the UE is switched to idle mode with the first cell; as well as Initiate cell reselection and measurement for the first subscription.

13. The method of claim 11, further comprising: During the duration of the timer, it is determined that the UE uses the first subscription to establish a connection with the third cell; The timer is terminated at least in part based on the connection established with the third cell using the first subscription; Determine whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality. as well as Whether to activate the first operating mode is determined at least in part based on whether the second channel quality meets the threshold channel quality.

14. The method of claim 11, further comprising: Determine that the timer has expired; Determine whether the first channel quality associated with the first communication link between the UE and the first cell meets the threshold channel quality; as well as Whether to activate the first operating mode is determined at least in part based on whether the first channel quality meets the threshold channel quality.

15. The method of claim 10, further comprising: It is determined that the second subscription is able to use the first cell to perform the first operating mode together with the first subscription, wherein the determination of the criteria for entering the first operating mode is based at least in part on the determination that the second subscription is able to use the first cell to perform the first operating mode together with the first subscription.

16. The method of claim 10, wherein determining the criteria for entering the first operating mode comprises: It is determined that the initiation of the first operating mode has been triggered by the radio resource control protocol of the UE.

17. The method of claim 10, further comprising: The threshold number of consecutive cyclic redundancy check (CRC) faults associated with the data channel of the first communication link is detected at least in part based on the paging radio network temporary identifier (P-RNTI), wherein the failure to meet the threshold channel quality is at least in part based on the threshold number of consecutive CRC faults detected associated with the data channel.

18. The method of claim 10, wherein failure to meet the threshold channel quality includes failure to meet channel quality-based combining conditions associated with the first operating mode.

19. The method of claim 10, wherein the first channel quality includes the reference signal received power or the signal-to-noise ratio.

20. The method of claim 10, wherein the first subscription is a default data subscription and the second subscription is a non-default data subscription.

21. An apparatus for performing wireless communication at a user equipment (UE), comprising: processor, Memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor to cause the device to perform the following operations: The UE's first subscription and the first cell are in active mode; The second subscription of the UE and the second cell are in idle mode; Identify a first operating mode of the UE, wherein the first operating mode includes performing an idle mode measurement for the second subscription using the first subscription; The first channel quality associated with the first communication link between the UE and the first cell was determined to have failed to meet the threshold channel quality. The first operating mode may be exited at least in part based on the failure to meet the threshold channel quality. as well as The idle mode measurement for the second subscription is performed using the second subscription, at least in part, based on the UE exiting the first operating mode.

22. The apparatus of claim 21, wherein the instructions are further executable by the processor to cause the apparatus to: The timer is started at least in part based on the UE exiting the first operating mode, wherein the idle mode measurement for the second subscription is performed using the second subscription during at least the duration of the timer.

23. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to: During the duration of the timer, it is determined that the UE uses the first subscription to establish a connection with the third cell; The timer is terminated at least in part based on the connection established with the third cell using the first subscription; Determine whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality. as well as Whether to re-enter the first operating mode is determined at least in part based on whether the second channel quality meets the threshold channel quality.

24. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to: Determine that the timer has expired; Determine whether the first channel quality associated with the first communication link between the UE and the first cell meets the threshold channel quality; as well as Whether to re-enter the first operating mode is determined at least in part based on whether the first channel quality meets the threshold channel quality.

25. The apparatus of claim 21, wherein the instruction for exiting the first operating mode is executable by the processor to cause the apparatus to: The first operating mode is exited at least in part based on a Radio Resource Control Protocol (RRC) trigger, wherein the RRC trigger is activated at least in part based on a failure to meet the threshold channel quality.

26. The apparatus of claim 21, wherein the instructions are further executable by the processor to cause the apparatus to: The threshold number of consecutive cyclic redundancy check (CRC) faults associated with the data channel of the first communication link is detected at least in part based on the paging radio network temporary identifier (P-RNTI), wherein the failure to meet the threshold channel quality is at least in part based on the threshold number of consecutive CRC faults detected associated with the data channel.

27. An apparatus for performing wireless communication at a user equipment (UE), comprising: processor, Memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor to cause the device to perform the following operations: The UE's first subscription and the first cell are in active mode; The second subscription of the UE and the second cell are in idle mode; The criteria for entering the first operating mode are determined, wherein the UE performs an idle mode measurement for the second subscription using the first subscription; The first channel quality associated with the first communication link between the UE and the first cell was determined to have failed to meet the threshold channel quality. as well as The activation of the first operating mode is postponed, at least in part, based on the failure to meet the threshold channel quality.

28. The apparatus of claim 27, wherein the instructions are further executable by the processor to cause the apparatus to: The timer is started at least in part based on the failure to meet the threshold channel quality, wherein the start of the first operating mode is delayed for at least the duration of the timer.

29. The apparatus of claim 28, wherein the instructions are further executable by the processor to cause the apparatus to: The first subscription of the UE is switched to idle mode with the first cell; and Initiate cell reselection and measurement for the first subscription.

30. The apparatus of claim 28, wherein the instructions are further executable by the processor to cause the apparatus to: During the duration of the timer, it is determined that the UE uses the first subscription to establish a connection with the third cell; The timer is terminated at least in part based on the connection established with the third cell using the first subscription; Determine whether the second channel quality associated with the second communication link between the UE and the third cell meets the threshold channel quality. as well as Whether to activate the first operating mode is determined at least in part based on whether the second channel quality meets the threshold channel quality.

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