Wireless communication for dual SIM devices

Abstract

Aspects of the present disclosure provide a method for wireless communication by a user equipment (UE). The method generally includes: receiving a request for a wireless connection from an application associated with one or more user equipment (UE) routing selection policy (URSP) rules, attempting to establish a wireless connection for the application via a first subscriber identity module (SIM) according to one or more of the URSP rules associated with the application supported by a first SIM, and if the attempt to establish a wireless connection for the application via the first SIM fails, taking one or more actions to establish a wireless connection for the application via a second SIM.

Description

[0001] background

[0002] Public domain

[0003] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for increasing the likelihood of successfully establishing a PDU session in a dual subscriber identity module (dual SIM) scenario.

[0004] Related technical description

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using OFDMA with cyclic prefix (CP) on downlink (DL) and uplink (UL) to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies.

[0008] Overview

[0009] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the disclosure as expressed in the appended claims, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages including improved performance of UEs operating with one or more SIMs.

[0010] Certain aspects provide a method for wireless communication by a user equipment (UE). The method generally includes: receiving a request for a wireless connection from an application associated with one or more user equipment (UE) routing selection policy (URSP) rules; attempting to establish a wireless connection for the application via a first subscriber identity module (SIM) based on one or more of the URSP rules associated with the application that are supported by a first SIM; and if the attempt to establish a wireless connection for the application via the first SIM fails, taking one or more actions to establish a wireless connection for the application via a second SIM.

[0011] Certain aspects provide a user equipment (UE). The UE generally includes: means for receiving a request for a wireless connection from an application associated with one or more other user equipment (UE) routing selection policy (URSP) rules; means for attempting to establish a wireless connection for the application via a first subscriber identity module (SIM) based on one or more of the URSP rules associated with the application that are supported by a first SIM; and means for taking one or more actions to establish a wireless connection for the application via a second SIM if the attempt to establish a wireless connection for the application via the first SIM fails.

[0012] Certain aspects provide a user equipment (UE). The UE generally includes a receiver configured to: receive a request for a wireless connection from an application associated with one or more other user equipment (UE) routing selection policy (URSP) rules; and a processing system configured to: attempt to establish a wireless connection for the application via a first subscriber identity module (SIM) according to one or more of the URSP rules associated with the application supported by the first SIM; and if the attempt to establish a wireless connection for the application via the first SIM fails, take one or more actions to establish a wireless connection for the application via a second SIM.

[0013] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes an interface configured to obtain a request for a wireless connection from an application associated with one or more user equipment (UE) routing policy (URSP) rules; and a processing system configured to: attempt to establish a wireless connection for the application via a first subscriber identity module (SIM) according to one or more of the URSP rules associated with the application supported by the first SIM; and if the attempt to establish a wireless connection for the application via the first SIM fails, take one or more actions to establish a wireless connection for the application via a second SIM.

[0014] Certain aspects provide a computer-readable medium for wireless communication. The computer-readable medium generally includes instructions that can be executed to perform the following operations: obtain a request for a wireless connection from an application associated with one or more user equipment (UE) routing selection policy (URSP) rules; attempt to establish a wireless connection for the application via a first subscriber identity module (SIM) based on one or more of the URSP rules associated with the application supported by a first SIM; and if the attempt to establish a wireless connection for the application via the first SIM fails, take one or more actions to establish a wireless connection for the application via a second SIM.

[0015] Aspects of the present disclosure provide apparatuses, devices, processors, and computer-readable media for performing the methods described herein.

[0016] To achieve the foregoing and related ends, one or more aspects include features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are only indicative of several of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to understand in detail the manner in which the above-stated features of the present disclosure are used, a more particular description of the content briefly summarized above may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0019] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0020] Figure 2 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0021] Figure 3 An example multi-SIM deployment for a UE is illustrated in accordance with certain aspects of the present disclosure.

[0022] Figure 4 is a flow diagram illustrating example operations for wireless communications by a UE in accordance with certain aspects of the present disclosure.

[0023] Figure 5 is a flow diagram illustrating example operations for wireless communications by a UE in accordance with certain aspects of the present disclosure.

[0024] Figure 6 is another flow diagram illustrating example operations for wireless communications by a UE in accordance with certain aspects of the present disclosure.

[0025] Figure 7 is another flow diagram illustrating example operations for wireless communications by a UE in accordance with certain aspects of the present disclosure.

[0026] The attached appendix includes details of certain aspects of the disclosure.

[0027] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation.

[0028] Detailed Description

[0029] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for mechanisms that can help increase the likelihood of successfully establishing a PDU session in a dual subscriber identity module (dual SIM) scenario. In some cases, a dual SIM dual standby (DSDS) UE receives a request from an application associated with one or more UE routing specific protocol (URSP) rules. After an attempt to establish a connection with a first SIM as a default data subscriber (DDS) is rejected, the DSDS UE may check whether the second SIM supports one of these URSP rules. If supported, the DSDS UE may attempt to establish a connection via the second SIM.

[0030] The following description provides an example of prioritizing activities on the SIM(s) of a UE in a communication system, without limiting the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Moreover, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice a method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionalities, or structures and functionalities that are supplementary to or in addition to the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of the claims. The wording "exemplary" is used herein to mean "used as an example, instance, or explanation". Any aspect described as "exemplary" herein is not necessarily to be interpreted as being superior to or superior to other aspects.

[0031] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, subcarrier, frequency channel, frequency modulation, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, a 5G NR RAT network may be deployed.

[0032] Figure 1 An example wireless communication network 100 is illustrated in which aspects of the present disclosure may be performed. For example, a UE 120a may support (or operate with) multiple SIMs and may have a SIM controller 122a that is configured to perform (or assist the UE 120a in performing) Figure 5 Operation 500. As will be described in more detail below, operation 500 may help a DSDSUE establish a data connection to serve applications associated with one or more URSP rules.

[0033] like Figure 1As illustrated in , the wireless communication network 100 may include several base stations (BSs) 110a-z (each also individually referred to herein as BS 110 or collectively referred to as BS 110) and other network entities. BS 110 may provide communication coverage for a particular geographic area (sometimes referred to as a "cell"), which may be stationary or mobile depending on the location of mobile BS 110. In some examples, BS 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.) using any suitable transport network. Figure 1 In the example shown in , BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for a pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. The BS may support one or more cells. BS 110 communicates with user equipment (UE) 120a-y (each also individually referred to herein as UE 120 or collectively referred to as UE 120) in the wireless communication network 100. UE 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.

[0034] The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.) that receives transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends transmissions of the data and / or other information to a downstream station (e.g., UE 120 or BS 110), or the relay station relays transmissions between UEs 120 to facilitate communication between the devices.

[0035] A network controller 130 may couple to a set of BSs 110 and provide coordination and control for these BSs 110. The network controller 130 may communicate with the BSs 110 via a backhaul. The BSs 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0036] Figure 2 1 and 120a (eg, in the example embodiment of the present invention) that can be used to implement various aspects of the present disclosure. Figure 1 Example components of the wireless communication network 100).

[0037] At BS 110a, a transmit processor 220 may receive data from a data source 212 and control information from a controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. The processor 220 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to modulators (MODs) 232a-232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0038] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) 254a-254r in the transceiver, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all demodulators 254a-254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 260, and provide decoded control information to a controller / processor 280.

[0039] On the uplink, at the UE 120a, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for a reference signal (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by a demodulator 254a-254r in the transceiver (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At the BS 110a, the uplink signal from the UE 120a may be received by the antenna 234, processed by the modulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120a. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240 .

[0040] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0041] The controller / processor 280 and / or other processors and modules at the UE 120a may perform or direct the execution of processes for the techniques described herein. Figure 2 As shown, the controller / processor 280 of the UE 120a has a SIM controller 122a, which is configured to implement the Figure 5-7 One or more of the techniques described.

[0042] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., BS 110) allocates resources for communication between some or all devices and equipment within its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entity utilizes resources allocated by the scheduling entity. BS 110 is not the only entity that can act as a scheduling entity. In some examples, UE 120 may act as a scheduling entity, and may schedule resources for one or more subordinate entities (e.g., one or more other UEs 120), and other UEs 120 may utilize resources scheduled by the UE 120 for wireless communication. In some examples, UE 120 may act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UE 120 may communicate directly with each other in addition to communicating with the scheduling entity.

[0043] In some examples, the communication between UE 120 and BS 110 is referred to as an access link. The access link may be provided via a Uu interface. The communication between devices may be referred to as a side link.

[0044] In some examples, two or more subordinate entities (e.g., UE 120) may use sidelink signals to communicate with each other. Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh networks, and / or various other suitable applications. In general, a sidelink signal may refer to a signal that is communicated from one subordinate entity (e.g., UE 120a) to another subordinate entity (e.g., another UE 120) without relaying the communication through a scheduling entity (e.g., UE 120 or BS 110), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, sidelink signals may be communicated using licensed spectrum (unlike wireless local area networks, which typically use unlicensed spectrum). An example of sidelink communication is PC5, for example, as used in V2V, LTE, and / or NR.

[0045] Various sidelink channels may be used for sidelink communications, including a physical sidelink discovery channel (PSDCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), and a physical sidelink feedback channel (PSFCH). PSDCH may carry discovery expressions that enable neighboring devices to discover each other. PSCCH may carry control signaling (such as sidelink resource configuration, resource reservation, and other parameters for data transmission), while PSSCH may carry data transmission. PSFCH may carry feedback, such as CSI related to sidelink channel quality. In some systems (e.g., NR version 16), two-stage SCI may be supported. The two-stage SCI may include a first-stage SCI (SCI-1) and a second-stage SCI (e.g., SCI-2). SCI-1 may include resource reservation and allocation information, information that may be used to decode SCI-2, and the like. SCI-2 may include information that may be used to decode data and determine whether the UE is the intended recipient of the transmission. SCI-1 and / or SCI-2 may be transmitted on PSCCH.

[0046] NR concurrent radio access technology (RAT) operation generally refers to operating multiple simultaneously active connections and at least one connection on NR. For example, the two connections may involve LTE and NR connections or both may be NR connections. Multi-SIM devices are able to connect to multiple networks independently without network knowledge. Different UE behaviors may be based on different implementations such as dual SIM dual active (DSDA) or dual SIM dual standby (DSDS). DSDS generally refers to a dual SIM deployment in which the two SIM cards of the UE may not be able to generate traffic at the same time. On the other hand, DSDA refers to a dual SIM deployment in which the two SIM cards of the UE can be active at the same time. As used herein, SIM generally refers to both virtual and hardware implementations of SIM. In other words, each SIM can be implemented on a multi-SIM device using hardware (e.g., a physical SIM card) or virtually implemented using a remote database.

[0047] Dual SIM receivers allow different SIMs to support a variety of different combination options. For example, a dual SIM (DSIM) device can support the following:

[0048] SA-NR+SA-NR: These two SIMs can support Standalone (SR) NR (SA-NR);

[0049] NSA-NR+LTE: one SIM supports Non-Standalone (NSA) and the other SIM supports LTE;

[0050] LTE+LTE: Both SIMs support LTE;

[0051] LTE+W: one SIM supports LTE and the other supports Wideband CDMA; or any other combination (X RAT+X RAT, both SIMs have the same RAT or X RAT+Y RAT, these SIMs support different RATs).

[0052] In some cases, in a multi-SIM deployment, each SIM of a UE may belong to the same network operator. For example, two or more SIMs (also referred to herein as subscribers or SUBs) belonging to the same operator may be in the following modes:

[0053] Idle+Idle: Two or more idle SUBs occupy the same cell.

[0054] Connected + Idle: One idle SUB and one connected SUB occupy the same cell

[0055] Figure 3 An example multi-SIM deployment is illustrated in which multiple SIMs share a single radio resource. For example, sharing the same radio resource, one SIM / Subscriber Module (SUB) can be registered with the 5G / NR Radio Access Network (RAN) while another SIM / SUB can be registered with LTE.

[0056] In such a scenario, two subscriber modules (SUBs) share the radio in the time domain, with each SUB accessing the shared radio resource at different times. Sharing a single radio resource by multiple SUBs may cause problems.

[0057] For example, Figure 3 As illustrated, when one SUB, such as a data delivery SIM (DDS), is running a time-sensitive service, such as online gaming with high-definition (HD) video, another SUB, such as a non-DDS (nDDS), needs to access shared radio resources to monitor paging.

[0058] Example DDS switch when connection request is rejected and N-DDS matches URSP rule

[0059] In some cases, in a DSDS UE, an application may request a new data connection, but the request may be rejected by the network.

[0060] For example, Figure 4 As illustrated, a DSDS UE may have two SUBs (SUB1 and SUB2), both of which support NR and operate in standalone (SA) mode, with an application (APP_1) subscribing to enhanced (e.g., "VIP") services using SUB2. The example assumes that SUB1 is a DDS.

[0061] As illustrated, application APP_1 may request a connection that specifies a specific data network name (DNN) or application ID (or both) that may be listed in one or more UE routing specific protocol (URSP) rules. In this context, URSP generally refers to a set of rules that enables a UE to determine how a specific application should be handled in the context of an existing or new PDU session, e.g., specifying a routing descriptor (RSD).

[0062] In a normal scenario, the UE will search the DDS (SUB1 in this example) for a match with the URSP rules for the application making the request, and request a PDU Session if a match is found. If the network denies every request (for every matching URSP rule supported by the DDSSUB1), the UE will request a PDU Session with a default rule (e.g., specifying a match for all traffic descriptors).

[0063] In this case, even though the requesting application may have subscribed to a dedicated service with the non-DDS (SUB2 in this example), only a basic level of service may be provided. Therefore, despite the subscription, the user will not get the best service. This scenario may be more likely to occur when the two SUBs (SUB1 and SUB2) belong to the same operator.

[0064] However, aspects of the present disclosure may help resolve this issue by attempting to establish a connection on a non-DDS sub before attempting to connect with a default rule when the network rejects a connection request for all matching rules in a URSP on a DDS sub.

[0065] Figure 5 Illustrated are example operations 500 for wireless communications in accordance with certain aspects of the present disclosure. Operations 500 may be performed by a UE (eg, UE 120a in wireless communication network 100) that is equipped with multiple SIMs (eg, corresponding to SUB1 and SUB2).

[0066] At 502, operations 500 begin by receiving a request for a wireless connection from an application associated with one or more user equipment (UE) routing policy (URSP) rules. At 504, the UE attempts to establish a wireless connection for the application via a first subscriber identity module (SIM) based on one or more of the URSP rules associated with the application that are supported by the first SIM. At 506, if the attempt to establish a wireless connection for the application via the first SIM fails, the UE takes one or more actions to establish a wireless connection for the application via a second SIM.

[0067] You can refer to Figure 6 and 7 Operation 500 can be understood by referring to the call flow diagram shown in FIG. Figure 4Similar to the example in, Figure 6 and 7 The example shown in also assumes that SUB1 is initially DDS when APP_1 requests a network connection.

[0068] like Figure 6 As explained, when the network rejects all matching rules in the URSP on the DDS SUB, the UE can check whether another SUB (in this case nDDSSUB2) has a URSP rule match for APP_1 before connecting with the default rule (e.g., selecting the "match all" traffic descriptor). If a matching rule is found, the SUB2 modem can indicate to the user that the DDS should be switched (from SUB1 to SUB2) to obtain the best service for the application.

[0069] according to Figure 6 The example solution shown in , may prompt the user to switch DDS from SUB1 to SUB2. If the user requests DDS switching, the UE will switch DDS to SUB 2 and send a PDU SESSION ESTABLISHMENT REQUEST with parameters that best meet the application request (e.g., DNN, PDU session type, session and service continuity (SSC) mode, etc.). In this case, the user can receive the best service for the specific application.

[0070] On the other hand, if the user does not request DDS switching, the UE may select the default rule for the APP. In this case, the UE may send a PDU SESSION ESTABLISHMENT REQUEST with a default DNN and Figure 4 Similar to the case of , the UE will only receive basic level services. In some cases, the application can automatically select DDS switching (for example, if certain conditions are met and the network has rejected all PDU session establishment requests matching URSP rules with the current DDS).

[0071] according to Figure 7 Another example solution shown in , in some cases, if no matching rule is found when checking nDDS (SUB2), the UE may send a PDU SESSION ESTABLISHMENT REQUEST with a default rule (e.g., the "match all" traffic descriptor is selected) via SUB2.

[0072] As described herein, one potential benefit of the techniques described herein is that when a UE fails to establish a connection with a URSP rule match on DDS and the UE finds a URSP rule match with DDS, the user may be able to more frequently receive the best service for a particular application by attempting a network connection via nDDS.

[0073] The techniques described herein may be used for various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0074] The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G, 4G and / or 5G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations.

[0075] In 3GPP, the term "cell" may refer to the coverage area of ​​a B node (NB) and / or a NB subsystem serving the coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and BS, next-generation B node (gNB or g B node), access point (AP), distributed unit (DU), carrier, or transmission reception point (TRP) may be used interchangeably. The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several thousand meters) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a residence, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS.

[0076] UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device (such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), transportation component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired medium. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity for or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0077] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also often referred to as frequency modulation, frequency bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain for OFDM and in the time domain for SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the spacing of subcarriers can be 15kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth may also be divided into subbands. For example, a subband may cover 1.8 MHz (e.g., 6 RBs), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, respectively. In LTE, the basic transmission time interval (TTI) or packet duration is a 1 ms subframe.

[0078] NR can utilize OFDM with CP on the uplink and downlink and includes support for half-duplex operation using TDD. In NR, a subframe is still 1ms, but the basic TTI is called a time slot. A subframe contains a variable number of time slots (e.g., 1, 2, 4, 8, 16...time slots), depending on the subcarrier spacing. NR RB is 12 consecutive frequency subcarriers. NR can support a base subcarrier spacing of 15KHz, and other subcarrier spacings can be defined relative to the base subcarrier spacing, such as 30kHz, 60kHz, 120kHz, 240kHz, etc. The symbol and time slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing. Beamforming can be supported and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. In some examples, the MIMO configuration in the DL can support up to 8 transmit antennas (multi-layer DL transmission with up to 8 streams) and up to 2 streams per UE. In some examples, multi-layer transmission of up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells.

[0079] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., BS) allocates resources for communication between some or all devices and equipment within its service area or cell. A scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities utilize resources allocated by the scheduling entity. A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE may act as a scheduling entity, and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs may utilize resources scheduled by the UE for wireless communication. In some examples, a UE may act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

[0080] In some examples, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh networks, and / or various other suitable applications. Generally, a sidelink signal may refer to a signal that is communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, the sidelink signal may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum).

[0081] Each method disclosed herein includes one or more steps or actions for implementing the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be changed without departing from the scope of the claims.

[0082] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0083] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Also, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0084] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" (unless specifically stated) but "one or more". Unless otherwise specifically stated, the term "some / some" refers to one or more. The elements of the various aspects described throughout this disclosure are all structural and functional equivalents currently or hereafter known to ordinary technicians in the art and are explicitly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be donated to the public, regardless of whether such disclosure is explicitly recorded in the claims. Any element of the claim should not be interpreted under the provisions of 35 U.S.C. § 112 (f), unless the element is explicitly stated using the phrase "device for..." or in the case of a method claim, the element is stated using the phrase "step for...".

[0085] The various operations of the methods described above may be performed by any suitable device capable of performing the corresponding functions. These devices may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. Generally, where there are operations illustrated in the figures, these operations may have corresponding paired device-plus-function components with similar numbers. For example, Figure 2 The processors 258, 264, and 266 of the UE 120a and / or the controller / processor 280, and / or the processors 220, 230, 238, and / or the controller / processor 240 of the BS 110a shown in FIG. 1 may be configured to perform Figure 5 , 6 and / or 7 operations.

[0086] The means for receiving may include Figure 2 The transceiver, receiver or at least one antenna and at least one receiving processor described in the embodiment. The device for transmitting, the device for sending or the device for outputting may include Figure 2 The transceiver, transmitter or at least one antenna and at least one transmit processor illustrated in the embodiment. The means for attempting, the means for using, the means for taking one or more actions, the means for switching and the means for providing may include a processing system, which may include one or more processors, such as Figure 2 1 and 12. Processors 258, 264, and 266 of UE 120a and / or controller / processor 280 and / or processors 220, 230, 238 and / or controller / processor 240 of BS 110a are shown in FIG.

[0087] In some cases, a device may not actually transmit a frame, but may have an interface (means for outputting) for outputting a frame for transmission. For example, a processor may output a frame to a radio frequency (RF) front end via a bus interface for transmission. Similarly, a device may not actually receive a frame, but may have an interface (means for obtaining) for obtaining a frame received from another device. For example, a processor may obtain (or receive) a frame from an RF front end via a bus interface for reception.

[0088] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0089] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the user terminal 120 (see Figure 1), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art and will not be described further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Those skilled in the art will recognize how to best implement the functionality described with respect to the processing system, depending on the specific application and the overall design constraints imposed on the overall network or system.

[0090] If implemented in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, which include any media that facilitate the transfer of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. As an example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, a machine-readable medium or any part thereof may be integrated into a processor, such as a cache and / or a general register file, which may be the case. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be implemented in a computer program product.

[0091] A software module may include a single instruction, or many instructions, and may be distributed over several different code segments, between different programs, and across multiple storage media. A computer-readable medium may include multiple software modules. These software modules include instructions that cause a processing system to perform various functions when executed by an apparatus such as a processor. These software modules may include a transmission module and a reception module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded into a RAM from a hard drive. During the execution of a software module, a processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When describing the functionality of a software module as described below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0092] Likewise, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared (IR), radio, and microwave), then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (such as infrared, radio, and microwave) is included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Disks, where disks often reproduce data magnetically, and discs reproduce data optically with lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0093] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored (and / or encoded) thereon instructions that can be executed by one or more processors to perform the operations described herein, such as for performing the operations described herein and in Figure 5 , 6 and / or instructions for the operations explained in 7.

[0094] In addition, it should be appreciated that modules and / or other appropriate means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that once the storage device is coupled to or provided to a user terminal and / or base station, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device may be utilized.

[0095] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

[0096] appendix

[0097] A DSDS (Dual Subscription Dual Standby) UE application requested a new data connection but was rejected by the NW using PDU SESSION ESTABLISHMENT REJECT. The UE will request a PDN session using a "match all" traffic descriptor. Only basic level services can be provided. Although this application has subscribed to a dedicated service using a non-DDS (Default Data Sub) sub, the user will not get the best service. This problem is likely to occur when both subs belong to the same operator.

[0098] When all matching rules in the URSP (UE routing policy reference ETSI TS 123.503) on a DDS sub are rejected by the NW, the UE shall try the URSP of another sub before selecting the "match all" traffic descriptor.

[0099] a. If a matching rule is found, the modem will instruct the user to switch to DDS to obtain the best service for this application. Solution 1

[0100] a.1 If the user requests DDS switching, the UE will change the DDS sub and send a PDU session establishment request to best meet the application's request, for example, DNN, PDU session type, SSC mode.

[0101] a.2 If the user requests not to perform DDS switching, the UE shall select the default rule for this APP.

[0102] b. If no matching rule is found, the default rule of "match all" traffic descriptors should be selected.

[0103] Solution 2

[0104] 1. Users will get the best service for a specific application

[0105] Call Flow

[0106]

[0107] Sample Solution 1

[0108]

[0109] Sample Solution 2

[0110]

[0111] Detectability

[0112] 1. The UE is DSDS and both subsystems support NR and work in SA mode.

[0113] 2. APP1 subscribes to VIP service with sub 2

[0114] 3. DDS on sub 1

[0115] 1. Run APP1

[0116] 2. All PDU sessions requested by APP1 on DDS sub are rejected by NW

[0117] 3. If there is an indication to the AP / client that a DDS switch is required to obtain better service, the present invention can be used.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving a request for a wireless connection from an application associated with one or more other user equipment (UE) routing selection policy (URSP) rules; attempting to establish the wireless connection for the application via a first subscriber identity module (SIM) according to one or more of the URSP rules associated with the application that are supported by the first SIM; as well as If the attempt to establish the wireless connection for the application via the first SIM fails, one or more actions are taken to establish the wireless connection for the application via a second SIM, wherein the application involves a subscription service with the second SIM.

2. The method of claim 1, wherein the wireless connection comprises a protocol data unit (PDU) session.

3. The method of claim 1, wherein: The request for the wireless connection indicates at least one of a data network name (DNN) or an application ID; and The method further includes checking, using at least one of the DNN or the application ID, for a match between one or more URSP rules supported by the first SIM or the second SIM and one or more of the URSP rules associated with the application.

4. The method of claim 1, wherein the one or more actions include: checking to see if the second SIM supports one or more of the URSP rules associated with the application; as well as If the second SIM supports one or more of the URSP rules associated with the application, attempt to establish the wireless connection for the application via the second SIM according to one or more of the URSP rules associated with the application supported by the second SIM.

5. The method of claim 4, further comprising: If the second SIM supports one or more of the URSP rules associated with the application, switching from using the first SIM as a default data subscriber (DDS) to using the second SIM as a DDS.

6. The method of claim 5, further comprising: providing an indication to the user that the second SIM provides a better service for the application than the first SIM, wherein: If the user selects DDS switching, a switch occurs from using the first SIM as a DDS to using the second SIM as a DDS.

7. The method of claim 6, further comprising attempting to establish the wireless connection via the first SIM according to a default rule if the user does not select the DDS switching.

8. The method of claim 4, further comprising: If the second SIM does not support any of the URSP rules associated with the application, attempting to establish the wireless connection via the second SIM according to default rules.

9. A user equipment (UE), comprising: means for receiving a request for a wireless connection from an application associated with one or more other user equipment (UE) routing selection policy (URSP) rules; means for attempting to establish the wireless connection for the application via a first Subscriber Identity Module (SIM) in accordance with one or more of the URSP rules associated with the application that are supported by the first SIM; as well as Means for taking one or more actions to establish the wireless connection for the application via a second SIM if the attempt to establish the wireless connection for the application via the first SIM fails, wherein the application relates to a subscription service with the second SIM.

10. The UE of claim 9, wherein the wireless connection comprises a protocol data unit (PDU) session.

11. The UE of claim 9, wherein: The request for the wireless connection indicates at least one of a data network name (DNN) or an application ID; and The UE further includes means for checking a match between one or more URSP rules supported by the first SIM or the second SIM and one or more of the URSP rules associated with the application using at least one of the DNN or the application ID.

12. The UE of claim 9, wherein the one or more actions include: checking to see if the second SIM supports one or more of the URSP rules associated with the application; as well as If the second SIM supports one or more of the URSP rules associated with the application, attempt to establish the wireless connection for the application via the second SIM according to one or more of the URSP rules associated with the application supported by the second SIM.

13. The UE of claim 12, further comprising: means for switching from using the first SIM as a default data subscriber (DDS) to using the second SIM as a DDS if the second SIM supports one or more of the URSP rules associated with the application.

14. The UE of claim 13, further comprising: means for providing an indication to a user that the second SIM provides a better service for the application than the first SIM, wherein: If the user selects DDS switching, a switch occurs from using the first SIM as the DDS to using the second SIM as the DDS.

15. The UE of claim 14, further comprising means for attempting to establish the wireless connection via the first SIM according to a default rule if the user does not select the DDS switching.

16. The UE of claim 12, further comprising: If the second SIM does not support any of the URSP rules associated with the application, means for attempting to establish the wireless connection via the second SIM according to default rules.

17. A user equipment (UE), comprising: a receiver configured to receive a request for a wireless connection from an application associated with one or more other user equipment (UE) routing selection policy (URSP) rules; and A processing system, the processing system being configured to: attempting to establish the wireless connection for the application via a first subscriber identity module (SIM) according to one or more of the URSP rules associated with the application that are supported by the first SIM; as well as If the attempt to establish the wireless connection for the application via the first SIM fails, one or more actions are taken to establish the wireless connection for the application via a second SIM, wherein the application involves a subscription service with the second SIM.

18. The UE of claim 17, wherein the wireless connection comprises a protocol data unit (PDU) session.

19. The UE of claim 17, wherein: The request for the wireless connection indicates at least one of a data network name (DNN) or an application ID; and The processing system is further configured to use at least one of the DNN or the application ID to check for a match between one or more URSP rules supported by the first SIM or the second SIM and one or more of the URSP rules associated with the application.

20. The UE of claim 17, wherein the one or more actions include: checking to see if the second SIM supports one or more of the URSP rules associated with the application; as well as If the second SIM supports one or more of the URSP rules associated with the application, attempt to establish the wireless connection for the application via the second SIM according to one or more of the URSP rules associated with the application supported by the second SIM.

21. The UE of claim 20, wherein: If the second SIM supports one or more of the URSP rules associated with the application, the processing system is further configured to switch from using the first SIM as a default data subscriber (DDS) to using the second SIM as a DDS.

22. The UE of claim 21, wherein: The processing system is further configured to provide an indication to a user that the second SIM provides a better service for the application than the first SIM, wherein: If the user selects DDS switching, a switch occurs from using the first SIM as the DDS to using the second SIM as the DDS.

23. The UE of claim 22, wherein the processing system is further configured to attempt to establish the wireless connection via the first SIM according to a default rule if the user does not select the DDS switching.

24. The UE of claim 20, wherein: If the second SIM does not support any of the URSP rules associated with the application, the processing system is further configured to attempt to establish the wireless connection via the second SIM according to default rules.

25. An apparatus for wireless communication, comprising: an interface configured to obtain a request for a wireless connection from an application associated with one or more user equipment (UE) routing selection policy (URSP) rules; and A processing system, the processing system being configured to: attempting to establish the wireless connection for the application via a first subscriber identity module (SIM) according to one or more of the URSP rules associated with the application that are supported by the first SIM; as well as If the attempt to establish the wireless connection for the application via the first SIM fails, one or more actions are taken to establish the wireless connection for the application via a second SIM, wherein the application involves a subscription service with the second SIM.

26. A computer-readable medium for wireless communications, comprising instructions executable to: obtaining a request for a wireless connection from an application associated with one or more user equipment (UE) routing selection policy (URSP) rules; attempting to establish the wireless connection for the application via a first Subscriber Identity Module (SIM) based on one or more of the URSP rules associated with the application that are supported by the first SIM; and If the attempt to establish the wireless connection for the application via the first SIM fails, one or more actions are taken to establish the wireless connection for the application via a second SIM, wherein the application involves a subscription service with the second SIM.

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