CN111970686A

CN111970686A - Data traffic aware system scanning for dual SIM dual standby system

Info

Publication number: CN111970686A
Application number: CN201910419028.1A
Authority: CN
Inventors: 荆翔鹏; K·安纳塔拉曼; 聂霄; 严耀琪; 宗瑞瑞
Original assignee: Apple Inc
Current assignee: Apple Inc
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-11-20
Anticipated expiration: 2039-05-20
Also published as: CN111970686B

Abstract

The present disclosure relates to data traffic aware system scanning for dual SIM dual standby systems. The present invention provides apparatus, systems, and methods for dual Subscriber Identity Module (SIM) dual standby (DSDS) User Equipment (UE) devices to perform data traffic aware system scanning. A DSDS UE transmits data with a network entity using a first SIM, wherein the transmitted data is associated with a first application running on the UE. The UE determines a priority associated with the transmitted data, wherein the priority associated with the transmitted data is determined based at least in part on an application type associated with the first application and whether the display is on. The UE modifies scanning behavior of the second SIM based at least in part on the priority associated with the transmitted data.

Description

Data traffic aware system scanning for dual SIM dual standby system

Technical Field

The present patent application relates to wireless devices including apparatus, systems, and methods for operating dual Subscriber Identity Module (SIM) dual standby (DSDS) wireless devices.

Background

The use of wireless communication systems is growing rapidly. In addition, wireless communication technologies have evolved from voice-only communications to transmissions that also include data, such as the internet and multimedia content. In some cases, a wireless device may include or be capable of utilizing multiple Subscriber Identity Modules (SIMs). Determining how to efficiently and effectively use multi-SIM capabilities to operate can be a challenging problem. Accordingly, improvements in the art are desired.

Disclosure of Invention

Embodiments of apparatus, systems, and methods for multi-subscriber identity module (multi-SIM) wireless devices, such as dual Subscriber Identity Module (SIM) dual standby (DSDS) _, using multiple SIMs to enable user equipment devices (UEs) to improve wireless communications are shown.

In some embodiments, a DSDS-enabled UE may establish a first connection with a network entity using a first SIM and may perform data communications using the first connection. The transmitted data may be associated with a first application running on the UE.

In some embodiments, the UE may determine a priority associated with the transmitted data, wherein the priority associated with the transmitted data is determined based at least in part on an application type associated with the first application and whether the display is on.

In some embodiments, the UE may modify the scanning behavior of the second SIM based at least in part on a priority associated with the transmitted data.

The techniques described herein may be implemented in and/or used with a plurality of different types of devices, including, but not limited to, cellular phones, tablets, wearable computing devices, portable media players, and any of a variety of other computing devices.

This summary is intended to provide a brief overview of some of the subject matter described in this document. Thus, it should be understood that the above-described features are merely examples and should not be construed to narrow the scope or spirit of the subject matter described herein in any way. Other features, aspects, and advantages of the subject matter described herein will become apparent from the following detailed description, the accompanying drawings, and the claims.

Drawings

A better understanding of the present subject matter can be obtained when the following detailed description of various embodiments is considered in conjunction with the following drawings, in which:

fig. 1 illustrates an example wireless communication system, in accordance with some embodiments;

fig. 2 illustrates a Base Station (BS) in communication with a User Equipment (UE) device, in accordance with some embodiments;

fig. 3 illustrates an example block diagram of a UE in accordance with some embodiments;

fig. 4 illustrates an example block diagram of a BS in accordance with some embodiments;

fig. 5 is a schematic diagram illustrating system scan scheduling modifications in a dual Subscriber Identity Module (SIM) dual standby (DSDS) UE, in accordance with some embodiments;

6A-6B are two tables indicating example traffic priority protocols and classifications, respectively, according to some embodiments;

fig. 7 is a flow diagram illustrating a method for directing system scanning behavior in a DSDS UE utilizing a data queue and a backoff counter, according to some embodiments;

fig. 8 is a schematic diagram illustrating a method for performing a discontinuous band scan according to some embodiments;

fig. 9 is a flow diagram illustrating a method for modifying system scanning behavior in a DSDS enabled UE, in accordance with some embodiments;

fig. 10 is a schematic diagram illustrating a method for modifying Public Land Mobile Network (PLMN) registration behavior in a DSDS UE, in accordance with some embodiments; and

fig. 11 is a flow diagram illustrating a method for modifying PLMN registration behavior in a DSDS UE, in accordance with some embodiments.

While features described herein are susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the drawings and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the subject matter as defined by the appended claims.

Detailed Description

Term(s) for

The following is a glossary of terms used in this disclosure:

memory medium — any of various types of non-transitory memory devices or storage devices. The term "storage medium" is intended to include mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-volatile memory such as flash memory, magnetic media, e.g., a hard disk drive or optical storage; registers or other similar types of memory elements, and the like. The memory medium may also include other types of non-transitory memory or combinations thereof. Further, the memory medium may be located in a first computer system executing the program, or may be located in a different second computer system connected to the first computer system through a network such as the internet. In the latter case, the second computer system may provide program instructions to the first computer for execution. The term "memory medium" may include two or more memory media that may reside at different locations in different computer systems, e.g., connected by a network. The memory medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.

Carrier medium-a memory medium as described above, and a physical transmission medium such as a bus, a network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.

Programmable hardware element — includes various hardware devices that include a plurality of programmable functional blocks connected via programmable interconnects. Examples include FPGAs (field programmable gate arrays), PLDs (programmable logic devices), FPOAs (field programmable object arrays), and CPLDs (complex PLDs). Programmable function blocks can range from fine grained (combinatorial logic units or look-up tables) to coarse grained (arithmetic logic units or processor cores). Programmable hardware elements may also be referred to as "configurable logic".

Computer system — any of various types of computing systems or processing systems, including Personal Computer Systems (PCs), mainframe computer systems, workstations, network appliances, internet appliances, Personal Digital Assistants (PDAs), television systems, grid computing systems, or other devices or combinations of devices. In general, the term "computer system" may be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a memory medium.

User Equipment (UE) (or "UE device") -any of various types of computer system devices that are mobile or portable and perform wireless communications. Examples of UE devices include mobile phones or smart phones (e.g., iphones)^TMBased on Android^TMTelephone), portable gaming devices (e.g., Nintendo DS)^TM、PlayStation Portable^TM、Gameboy Advance^TM、iPhone^TM) A laptop, a wearable device (e.g., a smart watch, smart glasses), a PDA, a portable internet appliance, a music player, a data storage device, or other handheld device, etc. In general, the term "UE" or "UE device" may be broadly defined to encompass any electronic, computing, and/or telecommunications device (or combination of devices) that is easily communicated by a user and capable of wireless communication.

Base station-the term "base station" has its full scope in its ordinary sense and includes at least a wireless communication station installed at a fixed location and used to communicate as part of a wireless telephone system or radio system.

Processing element-refers to various elements or combinations of elements. The processing elements include, for example, circuitry such as an ASIC (application specific integrated circuit), portions or circuits of various processor cores, an entire processor core, various processors, a programmable hardware device such as a Field Programmable Gate Array (FPGA), and/or a larger portion of a system including multiple processors.

Channel-the medium used to convey information from a sender (transmitter) to a receiver. It should be noted that the term "channel" as used herein may be considered to be used in a manner that conforms to a standard for the type of device to which the term is being referred, since the characteristics of the term "channel" may differ from one wireless protocol to another. In some standards, the channel width may be variable (e.g., depending on device capabilities, band conditions, etc.). For example, LTE may support a scalable channel bandwidth of 1.4MHz to 20 MHz. In contrast, a WLAN channel may be 22MHz wide, while a bluetooth channel may be 1MHz wide. Other protocols and standards may include different definitions for channels. Further, some standards may define and use multiple types of channels, e.g., different channels for uplink or downlink and/or different channels for different purposes such as data, control information, and so on.

Band-the term "band" has its ordinary meaning in its full scope and includes at least a segment of spectrum (e.g., the radio frequency spectrum) in which channels are used or set aside for the same purpose.

Auto-refers to an action or operation performed by a computer system (e.g., software executed by a computer system) or device (e.g., circuit, programmable hardware element, ASIC, etc.) without user input directly specifying or performing the action or operation. Thus, the term "automatically" is in contrast to a user manually performing or specifying an operation, wherein the user provides input to directly perform the operation. An automatic process may be initiated by input provided by a user, but subsequent actions performed "automatically" are not specified by the user, i.e., are not performed "manually," where the user specifies each action to be performed. For example, a user filling out an electronic form by selecting each field and providing input specifying information (e.g., by typing information, selecting a check box, radio selection, etc.) is manually filling out the form, even though the computer system must update the form in response to user action. The form may be automatically filled in by a computer system, wherein the computer system (e.g., software executing on the computer system) analyzes the fields of the form and fills in the form without any user entering answers specifying the fields. As indicated above, the user may invoke automatic filling of the form, but not participate in the actual filling of the form (e.g., the user does not manually specify answers for the fields but rather they are automatically completed). This specification provides various examples of operations that are automatically performed in response to actions that have been taken by a user.

Fig. 1 and 2-communication system

Fig. 1 illustrates a simplified example wireless communication system in accordance with some embodiments. It is noted that the system of fig. 1 is only one example of a possible system, and that the features of the present disclosure may be implemented in any of a variety of systems as desired.

As shown, the exemplary wireless communication system includes a base station 102A, the base station 102A communicating with one or more user devices 106A, 106B, etc. to a user device 106N over a transmission medium. Each of the user equipments may be referred to herein as a "user equipment" (UE). Thus, the user equipment 106 is referred to as a UE or UE device.

The Base Station (BS)102A may be a Base Transceiver Station (BTS) or a cell site (cellular base station) and may include hardware that enables wireless communication with the UEs 106A-106N.

The communication area (or coverage area) of a base station may be referred to as a "cell". The base station 102A and UE106 may be configured to communicate over a transmission medium using any of a variety of Radio Access Technologies (RATs), also referred to as wireless communication technologies or telecommunication standards, such as GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces), LTE-advanced (LTE-a), HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), 5G new radio (5G NR), and so on. Note that if base station 102A is implemented in the context of LTE, it may alternatively be referred to as an "eNodeB" or "eNB" while 5G NR base station 102A may be referred to as a "gnnodeb" or "gNB.

As shown, the base station 102A may also be equipped to communicate with a network 100 (e.g., a core network of a cellular service provider, a telecommunications network such as a Public Switched Telephone Network (PSTN) and/or the internet, among various possibilities). Thus, the base station 102A may facilitate communication between user equipment and/or between user equipment and the network 100. In particular, the cellular base station 102A may provide the UE106 with various communication capabilities, such as voice, SMS, and/or data services.

Base station 102A and other similar base stations (such as base stations 102b.. 102N) operating according to the same or different cellular communication standards may thus be provided as a network of cells that can provide continuous or nearly continuous overlapping service to UEs 106A-N and similar devices over a wide geographic area via one or more cellular communication standards.

Thus, although base station 102A may serve as a "serving cell" for UEs 106A-N as shown in fig. 1, each UE106 may also be capable of receiving signals (and possibly be within its communication range) from one or more other cells (which may be provided by base stations 102B-N and/or any other base stations), which may be referred to as "neighboring cells. Such cells may also be capable of facilitating communication between user equipment and/or between user equipment and network 100. Such cells may include "macro" cells, "micro" cells, "pico" cells, and/or cells providing any of a variety of other granularities of service area size. For example, the base stations 102A-B shown in fig. 1 may be macro cells, while the base station 102N may be a micro cell. Other configurations are also possible.

Note that the UE106 may be capable of communicating using multiple wireless communication standards. For example, in addition to at least one cellular communication protocol (e.g., GSM, UMTS (associated with, e.g., WCDMA or TD-SCDMA air interfaces), LTE-A, HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), 5G NR, etc.), UE106 may be configured to communicate using wireless networking (e.g., Wi-Fi) and/or peer-to-peer wireless communication protocols (e.g., bluetooth, Wi-Fi peer-to-peer, etc.). If desired, the UE106 may also or alternatively be configured to communicate using one or more global navigation satellite systems (GNSS, such as GPS or GLONASS), one or more mobile television broadcast standards (e.g., ATSC-M/H or DVB-H), and/or any other wireless communication protocol. Other combinations of wireless communication standards, including more than two wireless communication standards, are also possible.

Fig. 2 illustrates a user equipment 106 (e.g., one of devices 106A-106N) in communication with a base station 102, in accordance with some embodiments. The UE106 may be a device with cellular communication capabilities, such as a mobile phone, a handheld device, a wearable device, a computer or a tablet, or virtually any type of wireless device.

The UE106 may include a processor configured to execute program instructions stored in a memory. The UE106 may perform any of the method embodiments described herein by executing such stored instructions. Alternatively or additionally, the UE106 may include programmable hardware elements, such as an FPGA (field programmable gate array) configured to perform any of the method embodiments described herein or any portion of any of the method embodiments described herein.

The UE106 may include one or more antennas for communicating using one or more wireless communication protocols or technologies. In one embodiment, the UE106 may be configured to communicate using, for example, CDMA2000(1xRTT/1xEV-DO/HRPD/eHRPD), LTE, and/or a 5G NR using a single shared radio and/or GSM, LTE, and/or a 5G NR using a single shared radio. The shared radio may be coupled to a single antenna or may be coupled to multiple antennas (e.g., for MIMO) for performing wireless communications. In general, the radio components may include any combination of baseband processors, analog RF signal processing circuits (e.g., including filters, mixers, oscillators, amplifiers, etc.), or digital processing circuits (e.g., for digital modulation and other digital processing). Similarly, the radio may implement one or more receive chains and transmit chains using the aforementioned hardware. For example, the UE106 may share one or more portions of a receive chain and/or a transmit chain among multiple wireless communication technologies, such as those discussed above.

In some embodiments, the UE106 may include separate transmit and/or receive chains (e.g., including separate antennas and other radios) for each wireless communication protocol with which it is configured to communicate. As another possibility, the UE106 may include one or more radios shared between multiple wireless communication protocols, as well as one or more radios used exclusively by a single wireless communication protocol. For example, the UE106 may include a shared radio that uses either LTE or 1xRTT (or LTE or GSM) for communication, as well as a separate radio that uses each of Wi-Fi and bluetooth for communication. Other configurations are also possible.

FIG. 3-block diagram of a UE

Fig. 3 illustrates an exemplary block diagram of a UE106 according to some embodiments. As shown, the UE106 may include a System On Chip (SOC)300, which may include portions for various purposes. For example, as shown, SOC 300 may include one or more processors 302 that may execute program instructions for UE106, and display circuitry 304 that may perform graphics processing and provide display signals to display 360. The one or more processors 302 may also be coupled to a Memory Management Unit (MMU)340 (the Memory Management Unit (MMU)340 may be configured to receive addresses from the one or more processors 302 and translate those addresses to locations in memory (e.g., memory 306, Read Only Memory (ROM)350, NAND flash memory 310) and/or to other circuits or devices (such as display circuitry 304, wireless communication circuitry 330, connector I/F320, and/or display 360). the MMU340 may be configured to perform memory protection and page table translation or setup.

As shown, the SOC 300 may be coupled to various other circuits of the UE 106. For example, the UE106 may include various types of memory (e.g., including NAND flash memory 310), a connector interface 320 (e.g., for coupling to a computer system, docking station, charging station, etc.), a display 360, and wireless communication circuitry 330 (e.g., for LTE, LTE-A, CDMA2000, bluetooth, Wi-Fi, GPS, etc.).

As described above, the UE106 may be configured to wirelessly communicate using a plurality of wireless communication technologies. As further described above, in such cases, the wireless communication circuitry 330 may include a radio that is shared among multiple wireless communication technologies and/or a radio that is specifically configured for use in accordance with a single wireless communication technology. As shown, UE106 may include at least one antenna for performing wireless communication with cellular base stations and/or other devices (and in various possibilities, there may be multiple antennas, e.g., for MIMO and/or for implementing different wireless communication technologies). For example, the UE device 106 may perform wireless communication using the antenna 335.

The UE106 may also include and/or be configured for use with one or more user interface elements. The user interface elements may include various elements such as the display 360 (which may be a touch screen display), a keyboard (which may be a discrete keyboard or may be implemented as part of a touch screen display), a mouse, a microphone and/or a speaker, one or more cameras, one or more buttons, and/or any of a variety of other elements capable of providing information to a user and/or receiving or interpreting user inputs.

As shown, the UE106 may also include or be coupled to a SIM (subscriber identity module) 370. In some embodiments, the SIM 370 may be implemented as an application on a smart card. In some cases, the smart card itself may be referred to as a SIM card. As an example, the SIM 370 may be an application executing on a Universal Integrated Circuit Card (UICC). The smart card may also include (e.g., store and/or execute) one or more other applications, if desired. The smart card may be removable.

Alternatively, the SIM 370 may be implemented as an embedded SIM (esim). In this case, the SIM 370 may be implemented in device hardware and/or software. For example, in some embodiments, the UE106 may include an embedded uicc (euicc), e.g., a device that is built into the UE106 and is not removable. The eUICC can be programmable such that esims can be implemented on the eUICC. In other embodiments, the eSIM may be installed in the UE106 software, for example, as program instructions stored on a storage medium (such as the memory 306 or the NAND 310) executing on a processor (such as the processor 302) in the UE 106.

In some embodiments, the UE106 may be a multi-SIM device, or at least capable of supporting a multi-SIM card. Each SIM of such a UE106 may be implemented in any of a variety of ways, including as a removable SIM or an embedded SIM, among various possibilities. Dual SIM Dual Standby (DSDS) and dual SIM dual active (DSDS) are two examples of possible multi-SIM configurations that may be implemented by the UE106 according to various embodiments.

The user identity information may be used to identify the UE106 to the carrier cellular network of its user. In some cases, the user identification may also be used outside the "home desktop" area where the user's operator provides cellular services, for example, if the user's operator has arranged any roaming agreements with other network operators so that the visited network will recognize the user identity information and allow access to the network.

Note that the area in which the subscriber identity can be used to obtain cellular service over the bearer associated with the subscriber identity can be considered the "local service area" of the subscriber identity, where the location of the subscriber identity can be considered "local". In other words, as used herein, a UE106 may be considered to be able to obtain "local service" at a location that uses a user identity if the operator (e.g., that provides) associated with the user identity provides cellular service at that location.

Any area in which a user identity may be used to obtain cellular service via another operator associated with the user identity (e.g., via one or more roaming agreements) may be considered a "roaming service area" for the user identity. In other words, as used herein, if cellular service is provided at the location by a bearer that has negotiated a roaming agreement with a bearer associated with a subscriber identity, the UE106 may be considered to be able to obtain "roaming service" at the location using the subscriber identity.

Any area where a subscriber identity cannot be used to obtain cellular service via a bearer or any other user associated with the subscriber identity may be considered a "no service area" of the subscriber identity. In other words, as used herein, a UE106 may be considered to be able to obtain "no service" in one location using a subscriber identity if neither the bearer associated with the subscriber identity nor any other bearer that has negotiated a roaming agreement with the bearer associated with the subscriber identity provides cellular service for that location. Note that although no cellular service may be available at all in some (e.g., remote) locations, cellular service may still be available in locations where no service is available using a particular subscriber identity (e.g., using a different subscriber identity associated with a local carrier).

As described herein, the UE106 may include hardware and software components for implementing some or all of the methods described herein. The processor 302 of the UE device 106 may be configured to implement some or all of the methods described herein, for example, by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). In other embodiments, the processor 302 may be configured as a programmable hardware element such as an FPGA (field programmable gate array), or as an ASIC (application specific integrated circuit). Alternatively (or in addition), the processor 302 of the UE device 106, in conjunction with one or more of the

other components

300, 304, 306, 310, 320, 330, 335, 340, 350, 360, may be configured to implement some or all of the features described herein.

FIG. 4-block diagram of a base station

Fig. 4 illustrates an example block diagram of a base station 102 in accordance with some embodiments. It is noted that the base station of fig. 4 is only one example of possible base stations. As shown, base station 102 may include one or more processors 404 that may execute program instructions for base station 102. The one or more processors 404 may also be coupled to a Memory Management Unit (MMU)440 (which may be configured to receive addresses from the one or more processors 404 and translate the addresses to locations in memory (e.g., memory 460 and Read Only Memory (ROM) 450)) or other circuitry or device.

The base station 102 may include at least one network port 470. The network port 470 may be configured to couple to a telephone network and provide a plurality of devices, such as the UE device 106, with access to the telephone network as described above in fig. 1 and 2.

The network port 470 (or additional network ports) may also or alternatively be configured to couple to a cellular network, such as a core network of a cellular service provider. The core network may provide mobility-related services and/or other services to multiple devices, such as UE device 106. In some cases, the network port 470 may be coupled to a telephone network via a core network, and/or the core network may provide the telephone network (e.g., in other UE devices served by a cellular service provider).

The base station 102 may include at least one antenna 434 and possibly multiple antennas. The one or more antennas 434 may be configured for wireless transceiver operation and may also be configured for communication with the UE device 106 via the radio 430. One or more antennas 434 communicate with radio 430 via communication link 432. Communication chain 432 may be a receive chain, a transmit chain, or both. Radio 430 may be configured to communicate via various wireless communication standards including, but not limited to, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, 5G NR, and the like.

Base station 102 may be configured to communicate wirelessly using a plurality of wireless communication standards. In some cases, base station 102 may include multiple radios that may enable base station 102 to communicate in accordance with multiple wireless communication technologies. For example, as one possibility, base station 102 may include an LTE radio to perform communications according to LTE and a Wi-Fi radio to perform communications according to Wi-Fi. In such cases, base station 102 may be capable of operating as both an LTE base station and a Wi-Fi access point. As another possibility, the base station 102 may include a multi-mode radio capable of performing communications in accordance with any of a number of wireless communication technologies (e.g., LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, LTE and 5G NR, etc.).

As described further herein subsequently, BS 102 may include hardware and software components for implementing or supporting implementations of the features described herein. The processor 404 of the base station 102 may be configured to implement or support implementation of some or all of the methods described herein, for example, by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively, the processor 404 may be configured as a programmable hardware element such as an FPGA (field programmable gate array) or as an ASIC (application specific integrated circuit) or a combination thereof. Alternatively (or in addition), processor 404 of BS 102, in conjunction with one or more of the other components 430,432,434,440,450,460,470, may be configured to implement or support implementations of some or all of the features described herein.

Dual SIM Dual Standby (DSDS) supported UE

As previously described, in some cases, a wireless device may be able to utilize multiple Subscriber Identity Modules (SIMs). For example, dual SIM support may enable a device to register with two SIMs simultaneously, possibly on two different networks. Dual SIM support may include Dual SIM Dual Standby (DSDS) support, where a device may register with both SIMs at the same time, but may actively communicate with one network at a time (e.g., using a shared radio); or dual SIM Dual Standby (DSDA) support, where a device may register with both SIMs simultaneously and may actively communicate with both networks simultaneously in various dual SIM configurations.

Dual SIM support may be implemented in any of a variety of ways, as desired. For example, in various possibilities, the wireless device may provide dual SIM functionality only when the device is in a roaming state (e.g., with respect to a particular SIM, such as the primary SIM of the wireless device, or possibly with respect to all SIMs of the device), or only when the device is registered with a home network, or when the device is roaming and when the device is registered with a home network. As another example, when dual SIM functionality is implemented, different SIMs may have different availability in terms of voice and data communications. Thus, as a possibility, a primary SIM card (e.g., associated with a first user) may make them available for voice communications, while a secondary SIM card (e.g., associated with a second user) may be available for data communications. Alternative arrangements (e.g., primary SIM usable for data, secondary SIM usable for voice, both primary and secondary SIMs usable for voice and data, primary and secondary SIMs usable not only for voice or only for data, etc.) are possible. As yet another example, when dual SIM functionality is implemented, different SIMs may have different availability with respect to different Radio Access Technologies (RATs); for example, one or more available RATs available for one SIM may not be available for another SIM (and/or vice versa), and/or one or both SIMs may have different RAT availability, depending on whether the wireless device is operating in dual SIM mode or single SIM mode. As one possible configuration, when operating in a single SIM mode, the SIM may be configured for voice and/or data communications using any of GSM, WCDMA, LTE and/or 5G NR, and when operating in a dual SIM mode, the same functions or only a subset of these functions (e.g., voice only and GSM only, as a possibility) may be configured. Many other configurations are possible and should be considered within the scope of the present disclosure.

It is also noted that, in some cases, the particular configuration of a wireless device having dual SIM card functionality at a particular time may result from any combination of hardware and/or software features of the wireless device, user features of a SIM used with the wireless device, and/or user preferences, among various possible considerations and/or constraints.

In some cases, it may be that the SIM provides packet switched services in one mode of operation but not another. For example, as one possibility, a wireless device may be configured to use dual SIM mode when a primary SIM of the device is in a roaming state. To avoid data roaming charges for the primary SIM card (and/or for various other possible reasons), a secondary SIM with a local data plan may be used in dual SIM mode to provide packet switched (data) services, and the primary SIM may be used in dual SIM mode to provide circuit switched (voice) services. In this case, when in dual SIM card mode, packet switched services may not be available using the primary SIM card, and thus, the wireless device may not have access to the packet switched data network of the bearer (e.g., cellular service provider) associated with the primary SIM.

If a DSDS wireless device is in an environment where the network associated with its first SIM is experiencing good coverage (i.e., has a strong signal) and the network associated with the second SIM is experiencing poor or no coverage, the second SIM may attempt frequent system scans, potentially disrupting the functionality of the first SIM. Embodiments herein present devices and methods for performing data traffic aware system scanning for DSDS devices to mitigate these and other problems.

Radio sharing in DSDS UEs

In a DSDS device, when one of the SIMs (e.g., SIM1) is performing data communications with a network entity, the other SIM (e.g., SIM2) may be suspended and may be unable to conduct Transmit (TX) or Receive (RX) activities. Thus, two SIMs in a DSDS UE may alternate in turn between SIM1 or SIM2 having access to the UE's radio. Embodiments herein present methods and apparatus for improving performance and interworking of two SIMs in a DSDS UE.

In some embodiments, a DSDS UE device may have good coverage of a first bearer associated with SIM1 (e.g., the UE may be experiencing a strong enough signal to perform normal services on the first bearer), while the UE may be experiencing weak or no coverage of a second bearer associated with SIM 2. For example, the user may be in a roaming scenario, but the UE may not have a roaming plan for SIM2, and therefore may experience limited service. Alternatively, the user may have billing issues that result in a rejection from the home network via the SIM2, which may stay on limited service. Thus, the SIM2 may attempt to perform cell search, selection, and/or connection procedures more frequently to acquire and/or reacquire service on the same or a different network than if it experienced good coverage. As one example, the SIM2 may initially perform a search on a particular frequency or list of frequencies to find a base station for establishing a connection. If the initial frequency search (which may be referred to as a "short frequency scan" or "SLS") is unsuccessful, the SIM2 may continue to perform full band scanning (also referred to as a derived band search or "DBS") in an attempt to find a camped base station. As used herein, the term "system scan" is generally intended to refer to any of these or other types of scans and/or searches that may be performed in an attempt to identify a cell or base station in which the SIM will reside and establish service.

Because DSDS UE devices only have a single radio shared between SIM1 and SIM2, service recovery and/or search activities performed by SIM2 may periodically interrupt SIM1 data activities, resulting in a poor user experience. For example, if the UE is actively using video chat (e.g., FaceTime)^TMOr another video chat application) or real-time streaming on SIM1, the cell search, band scan, and/or selection process performed by SIM2 may negatively impact the sustained quality of service performed by SIM 1.

Full band searches performed by the SIM2 (such as DBS) may include continuous long scans that may leave SIM1 data services in a blank state for a longer period of time (e.g., 30 seconds, one minute, or other sufficiently long time to significantly interrupt SIM1 data activity). Still further, in mobile or roaming scenarios, the SIM2 may continue to attempt to register on the newly identified network and/or may reattempt to register on the network if it experiences a non-fatal rejection, which may further negatively impact continued SIM1 data and voice services.

To address these and other problems, embodiments herein present devices and methods for performing data traffic aware system scanning in DSDS enabled devices. In some embodiments, an Application Processor (AP) of a DSDS UE may share a data application type currently using data via SIM1 to a baseband processor (BB) of the UE, and the BB may schedule a SIM2 system scan search based on one or more of a priority of the SIM1 data type and/or a data queue occupancy state related to SIM1 data activity.

For example, in some embodiments, the UE may delay SIM2 system scans at variable durations based on data priority and queue status of SIM1 data activity. In some embodiments, if the BB receives information from the AP indicating that the SIM1 is engaged in high priority traffic (such as real-time video chat, video streaming, or another type of high priority data traffic), the SIM2 system scan may be delayed. Alternatively or in addition, if the screen of the UE is on, indicating that the user of the UE is actively using a data application on the SIM1, then SIM2 system scanning may be delayed.

In some embodiments, when SIM1 data traffic stops (e.g., if the data queue associated with SIM1 is empty), the UE may trigger an opportunistic scan on SIM 2. In some implementations, the UE may wait a predetermined period of time (e.g., one second or another duration) after SIM1 data traffic stops before triggering an opportunistic scan on the SIM 2. In some embodiments, the duration of each scan (e.g., the number of frequencies scanned) may be tuned based on the data priority of SIM1 data traffic.

Note that although for clarity the SIMs of the UE may be distinguished by using the terms "first" or "SIM 1" and "second" or "SIM 2", it should be noted that this is not meant to imply any sequential relationship between the SIMs, such as whether the SIM card is a primary or secondary SIM card, or to imply that there is a primary/secondary relationship between the SIM cards; the "first SIM" may be a primary or secondary SIM, while the "second SIM" may likewise be a primary or secondary SIM, or the SIMs may be considered peers in various possible embodiments.

Furthermore, while the embodiments herein describe scenarios in which SIM1 is experiencing good coverage and SIM2 is experiencing poor coverage, the opposite scenario is also considered to be within the scope of the present disclosure whereby SIM2 is experiencing good coverage and SIM1 is experiencing poor coverage, and in which the data traffic aware system scanning methods described herein may be performed for SIM1 rather than for SIM 2. For example, depending on the location and radio environment of the DSDS UE, the relative signal strength and/or roaming status experienced by each SIM may vary as the UE moves to different locations, and SIMs that are considered "poor coverage SIMs" may dynamically vary depending on the current radio environment.

FIG. 5 System Scan scheduling modification

Fig. 5 is a schematic diagram illustrating system scan scheduling modifications in a dual Subscriber Identity Module (SIM) dual standby (DSDS) UE, in accordance with some embodiments. As shown, the first SIM (i.e., SIM1) of the DSDS UE is performing active data communications with the first network entity, as indicated by the dashed box in fig. 5. SIM2 has no active connection and wishes to establish a connection with a second network entity. As shown, when the Public Land Mobile Network (PLMN) search timer (PST) expires, the SIM2 typically initiates a short frequency scan (SLS) to attempt to acquire service. However, as shown, the SIM2 defers SLS when the first PST expires because the SIM1 is actively transferring data. For example, the SIM2 may determine that the data queue associated with the SIM1 is not empty, and therefore determine that the SIM1 is actively transferring data. After the PST expires, the SIM2 may periodically check whether the data queue is empty before performing SLS. When the data queue is empty, the SIM2 may wait a predetermined time period "Th" (set to one second in fig. 5, but may be of other duration) before initiating SLS. If the SLS is unsuccessful and the SIM1 connection has been released, the SIM2 may perform a full band scan, such as a Derived Band Search (DBS).

FIG. 6A-6B-traffic priority

Fig. 6A-6B are two tables indicating example traffic priority protocols and classifications, respectively, according to some embodiments. Fig. 6A-6B are intended for exemplary purposes only and are not intended to limit the scope of the present disclosure. For example, fig. 6A-6B show a particular duration of the backoff counter duration and traffic priority classification, but other duration values and number of traffic priority classifications are possible, as desired. As shown, data traffic may be divided into three priority groups. The first highest priority (P1) may be reserved for real-time audio and/or video streaming applications for which the user may be particularly sensitive to service delays introduced by the radio performing a system scan or otherwise occupying the DSDS UE by the second SIM. The second medium priority traffic category (P2) may apply to any data traffic type that occurs when the display of the UE is on, as well as some other data application type that occurs when the display is off, such as music, mail, map/navigation applications, and/or Web browsing applications. Finally, the third lowest priority traffic class (P3) may be applicable to podcasting, news, weather, and stock ticker applications, as well as any other data traffic types that are not explicitly classified as P1 or P2 and are active when the display is off, among other possible types. Thus, the application type associated with the persistent data of the SIM1 and the status of the display of the UE may be considered in determining the priority of the data traffic. Fig. 6A shows an example maximum backoff counter duration for each of the three traffic priorities. The UE may measure the maximum backoff duration using a backoff counter that may be periodically incremented (after a threshold duration "Th" (which is one second in the example shown in fig. 6A). As shown, the highest priority traffic P1 has a longest backoff counter duration of 15 seconds. Thus, while data is being actively transferred on the SIM2, the SIM1 will wait up to 15 seconds to perform a system scan. For example, referring to fig. 5, if the SIM1 is transferring P1 class data for more than 15 seconds after the PST expires, the SIM2 may interrupt the SIM1 and perform SLS, even though the SIM1 is still transmitting data. For lower priority traffic such as P3, the SIM2 may interrupt the SIM1 after a short duration of 5 seconds to perform SLS.

FIG. 7-flow chart of system scanning behavior

Fig. 7 is a flow diagram illustrating a method for directing system scanning behavior in a DSDS UE utilizing a data queue and a backoff counter, according to some embodiments. As shown, at 804, the SIM2 may sleep until a sleep timer (e.g., PST, which may have a fixed duration of, for example, 10 seconds) expires at 806. When the sleep timer expires, the UE may determine at 808 whether the SIM1 data queue is empty.

If the data queue is not empty, the UE may determine a data priority for the data in the data queue (e.g., based on the application type associated with the data, and potentially also based on whether the display is on), and may determine a maximum backoff counter duration based on the priority classification at 818. The UE may then determine at 820 whether the maximum backoff counter duration has been reached. If so, the UE may reset the backoff counter, schedule a system scan, and after the system scan, the UE may calculate a scan sleep timer, restart the sleep timer, and put SIM2 into a sleep state. If the maximum backoff counter duration has not been reached, the UE may simply restart the sleep timer at 828 and put SIM2 into a sleep state at 804.

If the data queue is empty, the UE may determine if the queue is empty longer than a threshold duration ("Th," which may be one second or another duration) at 810. If the queue is empty longer than the threshold duration, the UE may increment the backoff counter at 812 and determine whether the maximum backoff counter has been reached at 814. If not, the UE may calculate a backoff counter at 816 and restart the sleep timer at 828 and put SIM2 into a sleep state at 804. If the backoff counter has been reached, the UE may reset the backoff counter at 822, schedule a system scan 824, and after the system scan, the UE may calculate a scan sleep timer at 826, restart the sleep timer at 828, and put the SIM2 into a sleep state at 804.

FIG. 8-discontinuous band scanning

Fig. 8 is a schematic diagram illustrating a method for performing discontinuous band scanning in a DSDS UE, according to some embodiments. In some embodiments, DSDS UEs may implement intermittent band scanning on SIM2 to reduce negative performance impacts on active data applications of SIM 1. For example, BB may break down a long duration frequency band scan into a greater number of micro-band scans alternating with sleep intervals so that data applications associated with SIM1 may have an opportunity to send data using the radio during the sleep intervals. In some embodiments, the duration of the micro-band scans and the sleep interval between micro-band scans may be dynamically adjusted based on the data application priority type and may be adjusted to balance between SIM1 data performance and service recovery on SIM 2. For example, high priority data traffic on the SIM1 (such as P1) may disable band scanning entirely on the SIM2 during high priority traffic. Alternatively, the UE may utilize shorter duration micro-band scanning and/or longer sleep intervals of the SIM2 when high priority traffic is ongoing on the SIM1 than when low priority traffic (such as P2 or P3) is ongoing on the SIM 1. The same approach may be used for medium priority traffic such as P2 as compared to low priority traffic such as P3. .

In some embodiments, flexible RAT configurations may be implemented for band scanning, whereby low priority RATs (e.g., GSM) may be scheduled less often than high priority RATs.

FIG. 9-flow diagram of network scan modification

Fig. 9 is a flow diagram illustrating a method for dynamically modifying system scanning behavior in a UE, in accordance with some embodiments. The method shown in fig. 9 may be used in conjunction with any of the computer systems or devices shown in the above figures, among other devices. The method may be implemented by a processor of the UE (such as processor 302 shown in fig. 3) that may execute program instructions to cause the UE to implement the described method steps. The UE may be configured for dual Subscriber Identity Module (SIM) dual standby (DSDS) operation, wherein the DSDS operation utilizes a first SIM and a second SIM over a single radio shared by the first SIM and the second SIM.

The method may be used in various types of cellular communication systems across any of various cellular technologies. In various embodiments, some of the components of the illustrated aspects may be performed concurrently in a different order than that shown, or may be omitted. Additional and/or alternative elements may also be implemented as desired. As shown, the method of fig. 9 may operate as follows.

In 902, the UE may use a first SIM for data communication with a network entity, wherein the transmitted data is associated with a first application running on the UE. The first SIM may connect with a network entity through a data subscription, and the transmitted data may include one or both of uplink data and/or downlink data. The connection of the first SIM with the network entity may be a Radio Resource Control (RRC) connection or another type of connection.

In 904, the UE may determine a priority associated with the transmitted data. A priority associated with the communicated data may be determined based at least in part on an application type associated with the first application and whether the display is on. In other words, as described in more detail above with reference to fig. 5, both the application type and the display status (e.g., on or off) of the first application may be used to determine the priority of the communicated data. Some types of high priority applications (such as real-time video and/or audio streaming applications) may be considered high priority regardless of the display state. Other types of lower priority application types may still cause the transmitted data to be determined to be high priority if the display is on. In some implementations, the priority may be determined as one of three different priorities (e.g., high, medium, or low priority).

In some embodiments, the UE may determine whether a data queue associated with the first SIM is empty. Determining a priority associated with the transmitted data may be performed based at least in part on determining that a data queue associated with the first SIM is not empty. In some embodiments, based at least in part on determining that the data queue associated with the first SIM is empty, the UE may determine whether the data queue associated with the first SIM is empty longer than a first predetermined threshold duration. The UE may perform a system scan of the second SIM if it is determined that the data queue associated with the first SIM is empty longer than a first predetermined threshold duration.

In 906, the UE may modify a scanning behavior of the second SIM based at least in part on a priority associated with the transmitted data. Modifying the scanning behavior of the second SIM may include modifying a maximum time period for delaying a system scan of the second SIM, wherein performing the system scan of the second SIM is delayed for the maximum time period if a data queue associated with the first SIM is not empty. For example, as described in more detail above with reference to fig. 7, if the data queue of a first SIM is occupied, the UE may delay performing a system scan of a second SIM. However, the UE may only delay performing the system scan of the second SIM for an amount of time corresponding to the maximum backoff counter duration. The maximum period of time to delay system scanning for the second SIM may be modified to be longer for higher priority data for the first SIM than for lower priority data for the first SIM.

In some embodiments, modifying the scanning behavior of the second SIM may include one or both of modifying a scan duration for performing a system scan of the second SIM and modifying a number of frequencies scanned while performing the system scan of the second SIM. For example, as one example, when higher priority data is conducted on the first SIM, the scan duration may be shorter and/or the number of frequencies scanned is less, such that the impact on higher priority traffic is reduced, as compared to when lower priority data is conducted on the first SIM. .

In some embodiments, the scanning behavior of the second SIM includes a full-band scan broken into a plurality of micro-band scans separated by sleep intervals. In these embodiments, modifying the scanning behavior of the second SIM includes modifying one or more of a duration of the micro-band scan and a duration of the sleep interval. For example, as described above with reference to fig. 8, the UE may perform a discontinuous band scan, in which the DBS is decomposed into a plurality of shorter partial band scans alternating with sleep periods, in which access to the UE's radio during sleep is returned to the first SIM. For example, the UE may implement a longer scan duration and/or a shorter sleep period for lower priority data than higher priority data.

In some embodiments, the UE may determine that a connection between a first SIM used to communicate data and a network entity has been terminated. In response, the UE may perform a derived band search of the second SIM. In other words, the UE may wait until the first SIM terminates its connection with the network entity before performing full band scanning (such as DBS).

FIG. 10 registration backoff for non-HPLMN

Fig. 10 is a schematic diagram illustrating a method for modifying Public Land Mobile Network (PLMN) registration behavior in a DSDS UE, according to some embodiments. In some embodiments, registration backoff of the non-HPLMN network of the SIM2 may be implemented during active high priority traffic on the SIM 1. For example, if the SIM2 finds a new network that is not the Home Plmn (HPLMN) and SIM1 high priority data traffic is ongoing, the SIM2 may delay registration attempts for non-HPLMNs until the end of the SIM1 high priority data. In a roaming scenario, the SIM2 may only attempt registration on networks in the OPLMN list, and may temporarily avoid re-attempting registration if the SIM2 receives a non-fatal network rejection.

PLMNs may be classified into a number of different types, such as HPLMN, registered PLMN (rplmn), equivalent PLMN (eplmn), equivalent home PLMN (ehplmn), operator controlled PLMN (oplmn), guest PLMN (vplmn), forbidden PLMN (fplmn), and challenge PLMN (iplmn), among other possibilities. Each different PLMN type is prioritized, and the UE attempts PLMN registration, typically according to the prioritization of the different available PLMN types. In some embodiments, when high priority data traffic using SIM1 is ongoing (e.g., P1 or P1 and P2 traffic), the UE may only attempt to register on PLMN types with sufficiently high priority (e.g., HPLMN, EPLMN, and highest priority OPLMN), and for lower priority PLMN types (e.g., lower ranked OPLMN, VPLMN, and FPLMN), registration may be delayed until the SIM1 data queue is empty.

FIG. 11-flow chart of PLMN registration timing modification

Fig. 11 is a flow diagram illustrating a method for dynamically modifying PLMN registration timing in a UE, in accordance with some embodiments. The method shown in FIG. 11 may be used in conjunction with any of the computer systems or devices shown in the above figures, among other apparatus. The method may be implemented by a processor of the UE (such as processor 302 shown in fig. 3) that may execute program instructions to cause the UE to implement the described method steps. The UE may be configured for dual Subscriber Identity Module (SIM) dual standby (DSDS) operation, wherein the DSDS operation utilizes a first SIM and a second SIM over a single radio shared by the first SIM and the second SIM.

The method may be used in various types of cellular communication systems across any of various cellular technologies. In various embodiments, some of the components of the illustrated aspects may be performed concurrently in a different order than that shown, or may be omitted. Additional and/or alternative elements may also be implemented as desired. As shown, the method of fig. 11 may operate as follows.

At 1102, the UE transmits data with a network entity using a first SIM, wherein the transmitted data is associated with a first application running on the UE. The first SIM may connect with a network entity through a data subscription, and the transmitted data may include one or both of uplink data and/or downlink data. The connection of the first SIM with the network entity may be a Radio Resource Control (RRC) connection or another type of connection.

At 1104, the UE determines a priority associated with the transmitted data, wherein the priority associated with the transmitted data is determined based at least in part on an application type associated with the first application. For example, video streaming applications, video chat applications, and voice over long term evolution (VoLTE) applications may be considered high priority data applications, while stock ticker updates, email, and weather applications may be considered low priority data applications when the screen is off, among other possibilities. A priority associated with the communicated data may be determined based at least in part on an application type associated with the first application and whether the display is on. In other words, as described in more detail above with reference to fig. 5, both the application type and the display status (e.g., on or off) of the first application may be used to determine the priority of the communicated data. Some types of high priority applications (such as real-time video and/or audio streaming applications) may be considered high priority regardless of the display state. Other types of lower priority application types may still cause the transmitted data to be determined to be high priority if the display is on. In some implementations, the priority may be determined as one of three different priorities (e.g., high, medium, or low priority).

At 1106, the UE discovers a Public Land Mobile Network (PLMN) through the second SIM. For example, the UE may perform an SLS or another type of scan, or may search for a list of known frequencies for a PLMN. Thus, the UE may know that a particular PLMN is available, but may not have registered with that PLMN.

At 1108, the UE determines a priority of the PLMN. For example, as described in more detail above with reference to fig. 10, the UE may determine the type of the PLMN (e.g., HPLMN, EPLMN, VPLMN, etc.) and may determine a priority of the PLMN type. For example, the HPLMN may have a higher priority than the VPLMN, etc.

At 1110, the UE modifies timing for attempting registration with the PLMN through the second SIM based at least in part on a priority associated with the transmitted data and a priority of the PLMN. In some embodiments, modifying the timing of attempting to register with the PLMN through the second SIM includes delaying attempting to register with the PLMN through the second SIM until the data queue associated with the first SIM is empty based on determining that the transferred data has a high priority and that the PLMN is lower in priority than the home PLMN. In other embodiments, the UE may identify whether the PLMN is of a type having a priority less than some other predetermined priority level, e.g., it may determine whether the priority of the PLMN is lower than the highest priority OPLMN. If it is of lower priority (e.g., if it is VPLMN) and the UE further determines that the first SIM data is high priority data or at least not low priority data, the UE may delay attempting registration on the PLMN until the data queue of the first SIM is empty. In other words, modifying the timing of the attempt to register with the PLMN through the second SIM may include delaying the attempt to register with the PLMN through the second SIM until the data queue associated with the first SIM is empty based at least in part on determining that the PLMN is low priority.

It is well known that the use of personally identifiable information should comply with privacy policies and practices that are recognized as meeting or exceeding industry or government requirements for maintaining user privacy. In particular, personally identifiable information data should be managed and processed to minimize the risk of inadvertent or unauthorized access or use, and the nature of authorized use should be specified to the user.

Embodiments of the present disclosure may be implemented in any of various forms. For example, some embodiments may be implemented as a computer-implemented method, a computer-readable memory medium, or a computer system. Other embodiments may be implemented using one or more custom designed hardware devices, such as ASICs. Other embodiments may be implemented using one or more programmable hardware elements, such as FPGAs.

In some embodiments, a non-transitory computer-readable memory medium may be configured such that it stores program instructions and/or data, wherein the program instructions, if executed by a computer system, cause the computer system to perform a method, e.g., any of the method embodiments described herein, or any combination of the method embodiments described herein, or any subset of any of the method embodiments described herein, or any combination of such subsets.

In some embodiments, a device (e.g., UE 106) may be configured to include a processor (or a set of processors) and a memory medium, wherein the memory medium stores program instructions, wherein the processor is configured to read and execute the program instructions from the memory medium, wherein the program instructions are executable to implement any of the various method embodiments described herein (or any combination of the method embodiments described herein, or any subset of any of the method embodiments described herein, or any combination of such subsets). The apparatus may be embodied in any of a variety of forms.

Although the above embodiments have been described in considerable detail, numerous variations and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated. It is intended that the following claims be interpreted to embrace all such variations and modifications.

Claims

1. A user equipment UE, comprising

A radio part;

a display; and

a processor operably coupled to the radio;

wherein the UE is configured for dual Subscriber Identity Module (SIM) dual standby (DSDS) operation, wherein the DSDS operation utilizes a first SIM and a second SIM, wherein the UE is configured to:

transmitting data with a network entity using the first SIM, wherein the transmitted data is associated with a first application running on the UE;

determining a priority associated with the transmitted data, wherein the priority associated with the transmitted data is determined based at least in part on an application type associated with the first application and whether the display is on; and

modifying scanning behavior of the second SIM based at least in part on the priority associated with the transferred data.

2. The UE of claim 1, wherein the UE is further configured to,

wherein modifying the scanning behavior of the second SIM comprises modifying a maximum time period for which system scanning of the second SIM is delayed,

wherein performing the system scan of the second SIM is delayed for the maximum time period if a data queue associated with the first SIM is not empty.

3. The UE of claim 2, wherein the maximum period of time to delay the system scan of the second SIM is modified to be longer for higher priorities than for lower priorities.

4. The UE of claim 1, wherein the UE is further configured to:

determining whether a data queue associated with the first SIM is empty,

wherein the determination of the priority associated with the transmitted data is performed based at least in part on determining that the data queue associated with the first SIM is not empty.

5. The UE of claim 4, wherein the UE is further configured to:

determining whether the data queue associated with the first SIM is empty longer than a first predetermined threshold duration based at least in part on determining that the data queue associated with the first SIM is empty; and

performing a system scan of the second SIM based on determining that the data queue associated with the first SIM is empty longer than the first predetermined threshold duration.

6. The UE of claim 1, wherein the UE is further configured to,

wherein modifying the scanning behavior of the second SIM comprises modifying a scan duration for performing a system scan of the second SIM.

7. The UE of claim 1, wherein the UE is further configured to,

wherein modifying the scanning behavior of the second SIM comprises modifying a number of frequencies scanned in performing a system scan of the second SIM.

8. The UE of claim 1, wherein the UE is further configured to:

determining that a connection between the first SIM for transferring data and the network entity has been terminated; and

performing a derived band search of the second SIM at least partially in response to determining that the connection of the first SIM with the network entity has been terminated.

9. The UE of claim 1, wherein the UE is further configured to,

wherein the scanning behavior of the second SIM comprises a full-band scan decomposed into a plurality of micro-band scans separated by sleep intervals, and

wherein modifying the scanning behavior of the second SIM comprises modifying one or more of:

a duration of the micro-band scan; and

a duration of the sleep interval.

10. A non-transitory computer accessible memory medium comprising program instructions for a user equipment device, UE, which when executed by a processor of the UE, cause the UE to:

transmitting data with a network entity using a first SIM of the UE, wherein the transmitted data is associated with a first application running on the UE;

determining a priority associated with the transmitted data, wherein the priority associated with the transmitted data is determined based at least in part on an application type associated with the first application and whether a display of the UE is on;

modifying a scanning behavior of a second SIM of the UE based at least in part on the priority associated with the transmitted data.

11. The non-transitory computer accessible memory medium of claim 10, wherein modifying the scanning behavior of the second SIM comprises modifying a maximum time period for which system scanning of the second SIM is delayed,

wherein if a data queue associated with the first SIM is not empty, performing the system scan of the second SIM is delayed for the maximum time period, and

wherein the maximum period of time to delay the system scan of the second SIM is modified to be longer for higher priority than for lower priority.

12. The non-transitory computer accessible memory medium of claim 10, wherein the program instructions are further executable to cause the UE to:

determining whether a data queue associated with the first SIM is empty,

13. The non-transitory computer accessible memory medium of claim 12, wherein the program instructions are further executable to cause the UE to:

14. The non-transitory computer accessible memory medium of claim 10, wherein modifying scanning behavior of the second SIM comprises modifying one or more of:

a scan duration for performing a system scan of the second SIM, an

A number of frequencies scanned in performing a system scan of the second SIM.

15. The non-transitory computer accessible memory medium of claim 10, wherein the program instructions are further executable to cause the UE to:

performing a derived band search of the second SIM at least partially in response to determining that the connection between the first SIM and the network entity has been terminated.

16. The non-transitory computer accessible memory medium of claim 10, wherein the scanning behavior of the second SIM includes a full band scan decomposed into a plurality of micro band scans separated by sleep intervals, and

a duration of the micro-band scan; and

a duration of the sleep interval.

17. A method, comprising:

by a wireless user equipment device (UE) configured for dual Subscriber Identity Module (SIM) dual standby (DSDS) operation, wherein the DSDS operation utilizes a first SIM and a second SIM, the method comprising:

determining a priority associated with the transmitted data, wherein the priority associated with the transmitted data is determined based at least in part on an application type associated with the first application;

discovering a Public Land Mobile Network (PLMN) through the second SIM;

determining a priority of the PLMN;

modifying timing for attempting registration with the PLMN through the second SIM based at least in part on a priority associated with the transmitted data and a priority of the PLMN.

18. The method of claim 17, wherein the first and second light sources are selected from the group consisting of,

wherein modifying the timing of attempting registration with the PLMN through the second SIM comprises: based on determining that the transmitted data has a high priority and that the PLMN has a lower priority than a home PLMN, delaying attempting to register with the PLMN through the second SIM until after a data queue associated with the first SIM is empty.

19. The method of claim 18, wherein the first and second portions are selected from the group consisting of,

wherein determining that the communicated data has the high priority comprises determining that the first application comprises one of:

a video streaming application;

a video chat application; or

A voice over long term evolution (VoLTE) application.

20. The method of claim 17, further comprising:

determining the PLMN is a Virtual PLMN (VPLMN), wherein determining the priority of the PLMN comprises determining the PLMN is a low priority based at least in part on determining the PLMN is a VPLMN,

wherein modifying the timing of attempting registration with the PLMN through the second SIM comprises: delaying attempting to register with the PLMN through the second SIM until after a data queue associated with the first SIM is empty based at least in part on determining that the PLMN is low priority.