Patent Description:
New radio (e.g., 5GNR) is an example of an emerging telecommunication standard.

Preferably, these P+S Ref. No.: 201195PC02 improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.

<CIT> discloses a method and apparatus for reporting power headroom to a base station in a user equipment having two subscriber identity modules (SIMs). In a user equipment with a dual connectivity SIM, the power headroom report (PHR) to a first base station includes a second power headroom value of the dual connectivity connection reduced by the power headroom value of the second SIM. The PHR to the second base station includes the first power headroom value reduced by the power headroom value of the second SIM. In a single connectivity, dual SIM user equipment, the PHR includes an average power headroom value of the other SIM.

Certain aspects provide a method, performed by a user equipment (UE), for wireless communication. The method generally includes establishing a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; establishing a second access link, associated with the first SIM of the UE, for communicating with a second base station; establishing a third access link associated with a second SIM of the UE; identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to use the third access link; and tuning to the third access link for communicating using the second SIM during at least one time period of the set of time periods indicated in the TDM pattern.

Certain aspects provide an apparatus for wireless communications by a user equipment. The apparatus generally includes at least one processor configured to establish a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; establish a second access link, associated with the first SIM of the UE, for communicating with a second base station; establish a third access link associated with a second SIM of the UE; identify at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to use the third access link; and tune to the third access link for communicating using the second SIM during at least one time period of the set of time periods indicated in the TDM P+S Ref. No.: 201195PC02 pattern. The apparatus also generally includes a memory coupled with the at least one processor.

Certain aspects provide an apparatus for wireless communications by a user equipment in a network. The apparatus generally includes means for establishing a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; means for establishing a second access link, associated with the first SIM of the UE, for communicating with a second base station; means for establishing a third access link associated with a second SIM of the UE; means for identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to use the third access link; and means for tuning to the third access link for communicating using the second SIM during at least one time period of the set of time periods indicated in the TDM pattern.

Certain aspects provide a non-transitory computer-readable medium for wireless communications by a user equipment in a network. The non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, cause the at least one processor to establish a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; establish a second access link, associated with the first SIM of the UE, for communicating with a second base station; establish a third access link associated with a second SIM of the UE; identify at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to use the third access link; and tune to the third access link for communicating using the second SIM during at least one time period of the set of time periods indicated in the TDM pattern.

Certain aspects provide a method for wireless communications by a base station (BS). The method generally includes establishing a first access link for communicating with a user equipment; identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods for the UE to use to tune to a second access link for communicating with a second base station; and one of reducing or stopping transmissions to the UE on the first access link during at least one time period of the set of time periods.

Certain aspects provide an apparatus for wireless communications by a base station (BS). The apparatus generally includes at least one processor configured to establishing a firs access link for communicating with a user equipment; identify at least one time division multiplexing (TDM) pattern indicating a set of time periods for the UE to use to tune to a second access link for communicating with a second base station; and one of reduce or stop transmissions to the UE on the first access link during at least one time period of the set of time periods. The apparatus also generally includes a memory coupled with the at least one processor.

Certain aspects provide an apparatus for wireless communications by a base station (BS). The apparatus generally includes means for establishing a first access link for communicating with a user equipment; means for identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods for the UE to use to tune to a second access link for communicating with a second base station; and one of means for reducing or means for stopping transmissions to the UE on the first access link during at least one time period of the set of time periods.

Certain aspects provide a non-transitory computer-readable medium for wireless communications by a base station (BS). The non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, cause the at least one processor to establishing a firs access link for communicating with a user equipment; identify at least one time division multiplexing (TDM) pattern indicating a set of time periods for the UE to use to tune to a second access link for communicating with a second base station; and one of reduce or stop transmissions to the UE on the first access link during at least one time period of the set of time periods.

Certain aspects provide a method, performed by a user equipment (UE), for wireless communication according to claim <NUM>. The method generally includes establishing a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; establishing a second access link, associated with the first SIM of the UE, for communicating with a second base station; establishing a third access link associated with a second SIM of the UE; determining a need for reduced capability on the second access link to communicate on the third access link; transmitting an indication of the need for the reduced capability to the second base station; and communicating on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM, wherein communicating on the second access link is at the reduced capability.

Certain aspects provide an apparatus for wireless communications by a user equipment according to claim <NUM>. The apparatus generally includes at least one processor configured to establish a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; establish a second access link, associated with the first SIM of the UE, for communicating with a second base station; establish a third access link associated with a second SIM of the UE; determine a need for reduced capability on the second access link to communicate on the third access link; transmit an indication of the need for the reduced capability to the second base station; and communicate on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM, wherein communicating on the second access link is at the reduced capability. The apparatus also generally includes a memory coupled with the at least one processor.

Certain aspects provide an apparatus for wireless communications by a user equipment in a network. The apparatus generally includes means for establishing a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; means for establishing a second access link, associated with the first SIM of the UE, for communicating with a second base station; means for establishing a third access link associated with a second SIM of the UE; means for determining a need for reduced capability on the second access link to communicate on the third access link; means for transmitting an indication of the need for the reduced capability to the second base station; and means for communicating on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM, wherein communicating on the second access link is at the reduced capability.

Certain aspects provide a non-transitory computer-readable medium for wireless communications by a user equipment in a network. The non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, cause the at least one processor to establish a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station; establish a second access link, associated with the first SIM of the UE, for communicating with a second base station; establish a third access link associated with a second SIM of the UE; determine a need for reduced capability on the second access link to communicate on the third access link; transmit an indication of the need for the reduced capability to the second base station; and communicate on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM, wherein communicating on the second access link is at the reduced capability.

Certain aspects provide a method for wireless communications by a base station (BS) according to claim <NUM>. The method generally includes establishing a first access link for communicating with a user equipment; receiving, from the UE, an indication of a need for reduced capability on the first access link; and reducing a number of transmissions to the UE on the first access link in response to the indication of the need for the reduced capability.

Certain aspects provide an apparatus for wireless communications by a base station (BS) according to claim <NUM>. The apparatus generally includes at least one processor configured to establishing a firs access link for communicating with a user equipment; receive, from the UE, an indication of a need for reduced capability on the first access link; and reduce a number of transmissions to the UE on the first access link in response to the indication of the need for the reduced capability. The apparatus also generally includes a memory coupled with the at least one processor.

Certain aspects provide an apparatus for wireless communications by a base station (BS). The apparatus generally includes means for establishing a first access link for communicating with a user equipment; means for receiving, from the UE, an indication of a need for reduced capability on the first access link; and means for reducing a number of transmissions to the UE on the first access link in response to the indication of the need for the reduced capability.

Certain aspects provide a non-transitory computer-readable medium for wireless communications by a base station (BS). The non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, cause the at least one processor to establishing a firs access link for communicating with a user equipment; receive, from the UE, an indication of a need for reduced capability on the first access link; and reduce a number of transmissions to the UE on the first access link in response to the indication of the need for the reduced capability.

Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for multi-universal subscriber identification module (USIM) and dual connectivity operation. For example, in some cases, a UE may have a first access link established with a first base station, a second access link established with a second base station, and a third access link established with a third base station. Accordingly, techniques presented herein involve tuning away from the second access link to the third access link according to a TDM pattern that indicates a set of time periods during which to use the third access link. According to aspects, these techniques may be transparent to the first base station on the first access link.

The claimed invention corresponds to <FIG>, <FIG> and to the related text in the description, the other figures and the remaining text of the description are only intended to better explain the claimed invention.

According to certain aspects, the BSs <NUM> and UEs <NUM> may be configured for multi-universal subscriber identification module (USIM) and dual connectivity operation, as described herein. As shown in <FIG>, the BS 110a includes a dual connectivity module <NUM>. The dual connectivity module <NUM> may be configured to perform the operations illustrated in one or more of <FIG>, <FIG>, and <FIG>, as well as other operations disclosed herein for multi-USIM and dual connectivity operation, in accordance with aspects of the present disclosure. Additionally, as shown in <FIG>, the UE 120a includes a dual connectivity module <NUM>. The dual connectivity module <NUM> may be configured to perform the operations illustrated in one or more of <FIG>, <FIG>, and <FIG>, as well as other operations disclosed herein for multi-USIM and dual connectivity operation, in accordance with aspects of the present disclosure.

Wireless communication network <NUM> may also include relay stations (e.g., relay station <NUM>10r), also referred to as relays or the like, that receive a transmission of data and/or other information from an upstream station (e.g., a BS 110a or a UE 120r) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE <NUM> or a BS <NUM>), or that relays transmissions between UEs <NUM>, to facilitate communication between devices.

At the BS 110a, a transmit processor <NUM> may receive data from a data source <NUM> and control information from a controller/processor <NUM>. The transmit processor <NUM> may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), and cell-specific reference signal (CRS). A transmit (TX) multiple-input multiple-output (MIMO) processor <NUM> may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers 232a-232t. Each modulator in transceivers 232a-232t may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Downlink signals from the modulators in transceivers 232a-232t may be transmitted via the antennas 234a-234t, respectively.

At the UE 120a, the antennas 252a-252r may receive the downlink signals from the BS 110a and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator in transceivers 254a-254r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. A MIMO detector <NUM> may obtain received symbols from all the demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor <NUM> may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink <NUM>, and provide decoded control information to a controller/processor <NUM>.

On the uplink, at UE 120a, a transmit processor <NUM> may receive and process data (e.g., for the physical uplink shared channel (PUSCH)) from a data source <NUM> and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor <NUM>. The symbols from the transmit processor <NUM> may be precoded by a TX MIMO processor <NUM> if applicable, further processed by the demodulators in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At the BS 110a, the uplink signals from the UE 120a may be received by the antennas <NUM>, processed by the modulators in transceivers 232a-232t, detected by a MIMO detector <NUM> if applicable, and further processed by a receive processor <NUM> to obtain decoded data and control information sent by the UE 120a.

The controller/processor <NUM> and/or other processors and modules at the BS <NUM> and/or UE 120a may perform or direct the execution of processes for the techniques described herein. For example, as shown in <FIG>, the controller/processor <NUM> of the BS 110a includes a dual connectivity module <NUM> that may be configured to perform the operations illustrated in one or more of <FIG>, <FIG>, and <FIG>, as well as other operations disclosed herein for multi-USIM and dual connectivity operation, according to aspects described herein. As shown in <FIG>, the controller/processor <NUM> of the UE 120a includes dual connectivity module <NUM> that may be configured to perform the operations illustrated in one or more of <FIG>, <FIG>, and <FIG>, as well as other operations disclosed herein for multi-USIM and dual connectivity operation, according to aspects described herein. Although shown at the Controller/Processor, other components of the UE 120a and BS 110a may be used performing the operations described herein.

In certain cases, two different subscriptions may be supported on a same device, such as a user equipment (UE), and may be based on two separate subscriber identification module (SIMs), known as multi-SIM (MSIM). These subscriptions may be on the same radio network or different radio networks and could have different subscription profiles and quality of service (QOS) requirements. Further, different subscriptions may provide services on the same or different radio access technologies (RATs). Generally, MSIM solutions use less resources, while performing operations on two different RATs, than that needed by two independent solutions with the goal of optimizing resource (RF, MIPs, etc.) usage as well as providing an enhanced user experience.

In some cases, different classes of radio frequency (RF) solutions exist for MSIM devices. For example, in some cases, the MSIM device may include a dual transceiver that may provide dual receive and dual access (DSDA). For example, in this case, each subscription of the MSIM device may correspond to its own transceiver. In other cases, the MSIM device may include a single transceiver where two subscriptions share the same radio resources/receive chain. Due to RF complexity, cost, and power consumption considerations, the majority of legacy dual subscription devices and solutions share a single transceiver and the same receive chain.

With <NUM> New Radio (NR) deployments aggressively moving ahead globally, MSIM solutions now comprise of a combination of <NUM> + <NUM>/<NUM>/<NUM> RATs. There are two <NUM> solutions defined by Re115 3GPP standards: non-standalone (NSA) and standalone <NUM> (SA). In the standalone <NUM> NR architecture, both signaling network and radio may be handled by a <NUM> core network. In contrast, in <NUM> NSA networks, a long term evolution (LTE) core network and LTE radio access may be used as an anchor for all signaling and mobility management while adding a new <NUM> carrier. The NSA architecture is attractive for early deployments of <NUM> NR access systems as networks may reuse the legacy operational LTE eNodeB (eNB) and evolved packet core (EPC). Non-standalone solutions are also attractive as they facilitate a seamless migration from <NUM> to <NUM> for networks leveraging existing LTE core network.

Dual Connectivity (DC) has been introduced to allow a UE to simultaneously connect to two different network points for achieving higher throughput, reliability and mobility robustness. Evolved Universal Mobile Telecommunications Service Terrestrial Radio Access Network (EUTRAN)-NR Dual Connectivity (ENDC) is one form of dual connectivity using LTE and NR. In ENDC mode and for a non-standalone implementation, the UE may be connected to an LTE eNB on a first access link and to an NR gNB on a second access link. In certain cases, the LTE eNB may act as a master node (MeNB) while the gNB may act as a secondary node (SgNB). Both nodes may interface with the Evolved packet core (EPC) in the user plane but the master node may have direct connection to EPC.

As noted, in some cases, the UE may communicate on a plurality of access links. For example, in some cases, the UE may communicate on a first access link with a first base station (e.g., an LTE base station) and may communicate on a second access link with a second base station (e.g., a <NUM> base station). In some cases, the first access link and the second access link may be associated with a first SIM. Additionally, in some cases, the UE may communicate on a third access link associated with a second SIM.

However, in some cases, the UE may not be capable of receiving data and/or signaling simultaneously on the plurality of access links using both SIMs. For example, in dual connectivity (e.g., EN-DC), a processing capability of the UE (e.g., due to the single receive chain) may prevent the UE from receiving using a first SIM on a first access link while concurrently receiving using the first SIM on the second access link or the second SIM on the third access link. Similarly, receive and/or transmitting, concurrently, on a plurality of access links and using a plurality of SIMs may result in interference.

Accordingly, to address these issues, aspects of the present disclosure provide techniques for enabling configuration of one or more time division multiplexing (TDM) patterns indicating a set of time periods during which to use one or more of a plurality of access links. For example, the UE may identify a TDM pattern for tuning from a second access link associated with a first SIM and to a third access link associated with a second SIM, and may tune to the third access link to, for example, receive signaling and/or data on the third access link. In some cases, the techniques presented herein may be transparent to the first base station associated with the first access link (e.g., LTE) so as not to disrupt its operation. Further, by introducing a TDM pattern for communicating on the third access link, the UE may reduce a likelihood of dropped communications resulting from attempting to concurrently transmit and/or receive a plurality of data transmissions or control signals on a plurality of access links using a plurality of SIMs.

<FIG> is a flow diagram illustrating example operations <NUM> for wireless communication, in accordance with certain aspects of the present disclosure. The operations <NUM> may be performed, for example, by UE (e.g., such as a UE 120a in the wireless communication network <NUM>) for multi-universal subscriber identification module (USIM) and dual connectivity operation, as described herein. More specifically, operations <NUM> may be performed by the UE for communicating with a BS according to a TDM pattern, as described herein.

Operations <NUM> may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor <NUM> of <FIG>). Further, the transmission and reception of signals by the UE in operations <NUM> may be enabled, for example, by one or more antennas (e.g., antennas <NUM> of <FIG>). In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor <NUM>) obtaining and/or outputting signals.

The operations <NUM> begin, at <NUM>, by establishing a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station.

At <NUM>, the UE establishes a second access link, associated with the first SIM of the UE, for communicating with a second base station.

At <NUM>, the UE establishes a third access link associated with a second SIM of the UE.

At <NUM>, the UE identifies at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to use the third access link.

At <NUM>, the UE tunes to the third access link for communicating using the second SIM during at least one time period of the set of time periods indicated in the TDM pattern.

<FIG> is a flow diagram illustrating example operations <NUM> for wireless communication, in accordance with certain aspects of the present disclosure. The operations <NUM> may be performed, for example, by base station (e.g., such as a BS <NUM> in the wireless communication network <NUM>) for multi-USIM and dual connectivity operation, as described herein. More specifically, operations <NUM> may be performed by the BS for communicating with a UE according to a TDM pattern, as described herein.

In some cases, the base station may comprise the second base station of operations <NUM>. Operations <NUM> may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor <NUM> of <FIG>). Further, the transmission and reception of signals by the BS in operations <NUM> may be enabled, for example, by one or more antennas (e.g., antennas <NUM> of <FIG>). In certain aspects, the transmission and/or reception of signals by the BS may be implemented via a bus interface of one or more processors (e.g., controller/processor <NUM>) obtaining and/or outputting signals.

The operations <NUM> begin, at <NUM>, by establishing a first access link for communicating with a user equipment. In some cases, the first access link may correspond to the second access link established between the UE and second base station in operations <NUM>.

At <NUM>, the BS identifies at least one time division multiplexing (TDM) pattern indicating a set of time periods for the UE to use to tune to a second access link for communicating with a second base station. In some cases, the second access link may correspond to the third access link established by the UE in operations <NUM>.

At <NUM>, the BS one of reduces or stops transmissions to the UE on the first access link during at least one time period of the set of time periods.

As noted above, aspects of the present disclosure provide techniques for enabling configuration of one or more time division multiplexing (TDM) patterns indicating a set of time periods during which a UE may use one or more of a plurality of access links. For example, in some cases, a UE may establish a first access link with a first base station and a second access link with a second base station. In some cases, the UE may use a first SIM for communicating on the first access link and the second access link. In some cases, however, the UE may also establish a third access link, associated with a second SIM of the UE, for communicating with a third base station. In some cases the third base station may comprise one of the first base station, the second base station, or a completely different base station. Additionally, in some cases, the first base station may comprise a master node (e.g., LTE) and the second base station may comprise a secondary node (e.g., <NUM>).

Accordingly, when operating in dual connectivity mode, the UE may communicate with the first base station on the first access link and the second base station on the second access link. Additionally, in certain cases, the UE may also desire to communicate with the third base station on the third access link. However, when the UE is not capable of using both the second access link and the third access link simultaneously (e.g., due to only one transceiver and one Rx chain), a "gap" may be created on at least one of the links (e.g., the second access link) during which the UE can access the other link (e.g., the third access link). Accordingly, a TDM pattern may be identified and used by the UE for communicating on the third access link using a second SIM. For example, the TDM pattern may indicate a set of time periods during which to communicate on the third access link using the second SIM. The set of time periods indicated in the TDM pattern may correspond to periods of time when the second base station reduces or stops transmission on the second access link, allowing the UE to tune to the third access link to receive signaling and/or data.

In some cases, when the UE is capable of using both the second access link and the third access link simultaneously (e.g., the UE has at least two Rx chains) but with reduced capability, the UE may inform at least one of the second base station or third base station for such reduction (e.g., to transmit less on a respective access link). According to aspects, the reduced UE capability may also be applicable to the TDM pattern if the UE cannot fully use its capability due to frequent switching.

According to aspects, in either case, the TDM pattern may be negotiated between the UE and the second base station and may be transparent to the first base station, for example, so as to not disrupt operation of the first base station.

<FIG> illustrates an example call-flow for configuring and communicating using a TDM pattern, according to certain aspects presented herein. It should be understood that the order of steps shown in <FIG> is merely exemplary and that the steps may not necessarily occur in the exact order as shown. For example, in some cases, steps <NUM>-<NUM>, described below, may occur in an order different from that shown in <FIG>.

As illustrated in <FIG>, at step <NUM>, the UE <NUM> establishes a first access link, associated with a first SIM of the UE <NUM>, for communicating with a first base station <NUM>. In some cases, the first base station <NUM> may comprise a master node (MN) and may be associated with a first radio access technology (RAT), such as an LTE. At step <NUM>, the UE <NUM> establishes a second access link, associated with the first SIM of the UE <NUM>, for communicating with a second base station <NUM>. In some cases, the second base station <NUM> may comprise a secondary node (SN) and may be associated with a second RAT, such as a <NUM>.

In the invention, the UE <NUM> is capable of communicating on both the first access link and the second access link, known as dual connectivity. Additionally, in the invention, the UE <NUM> includes a second SIM and establishes a third access link associated with the second SIM of the UE <NUM>, as shown at step <NUM> in <FIG>. In some cases, the UE <NUM> may use the third access link for communicating with a third base station <NUM> (or wireless node (WN)), which may be associated with a third RAT. In some cases, the UE <NUM> may establish the third access link with a same base station as the first access link or the second access link but using a second SIM.

At step <NUM> in <FIG>, the UE <NUM> determines a need for gaps on the first SIM (e.g., USIM A) to communicate on the third access link using the second SIM (e.g., USIM B). Accordingly, in response to the determination of the need for the gaps on the first SIM to communicate on the third access link using the second SIM, the UE <NUM> may identify at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to communicate on the third access link using the second SIM. In some cases, the at least one TDM pattern may apply to downlink transmissions only, uplink transmissions only, or both uplink and downlink transmissions.

In some cases, identifying the at least one TDM pattern may include requesting a TDM pattern from the second base station <NUM>. For example, as shown at step 5A in <FIG>, the UE <NUM> may transmit signaling to the second base station <NUM> requesting a TDM pattern. In some cases, requesting the TDM pattern may comprise transmitting an indication to the second base station <NUM> indicating a need for reduced capability on the second access link. In the invention, the indication of the need for the reduced capability on the second access link may request the second base station <NUM> to reduce transmission on the second access link during transmissions on the third access link. In such cases, the second access link operates according to the reduced capability during at least one time period of the set of time periods, the indication may be in the TDM pattern. That is, the second base station <NUM> may reduce transmissions on the second access link during the at least one time period of the set of time periods indicated in the TDM patter to facilitate communication by the UE <NUM> on the third access link.

Additionally, in some cases, as illustrated at step 5A in <FIG>, transmitting the signaling to the second base station <NUM> requesting a TDM pattern may include transmitting the signaling to the first base station <NUM> in a transparent container that may be forwarded by the first base station <NUM> to the second base station <NUM>. In other cases, for example, transmitting the signaling requesting the TDM pattern to the second base station <NUM> may comprise transmitting the signaling requesting the TDM pattern directly to the second base station <NUM> using a radio bearer established directly between the UE <NUM> and the second base station <NUM> (e.g., SRB3), as illustrated at step 5B in <FIG>. In some cases, as shown in steps 5A and 5B, the signaling requesting a TDM pattern may comprise radio resource control (RRC) signaling. That is, the UE <NUM> may transmit the signaling requesting a TDM pattern in an RRC message.

In either case, as shown at step <NUM> <FIG>, the UE <NUM> may receive an indication of the at least one TDM pattern from the second base station <NUM> configuring the UE <NUM> to use the TDM pattern. Accordingly, in some cases, identifying the at least one TDM pattern may include identifying the at least one TDM pattern based on the indication of the at least one TDM pattern from the second base station <NUM>. According to aspects, the indication of the at least one TDM pattern from the second base station <NUM> may be transmitted in RRC signaling directly to the UE <NUM> (e.g., using the SRB3 bearer) or indirectly to the UE <NUM> (e.g., via the first base station <NUM> in a transparent container).

In some cases, the indication of the at least one TDM pattern from the second base station <NUM> may comprise an index value associated with the at least one TDM pattern and identifying the at least one TDM pattern by the UE <NUM> is based on the index value. For example, in some cases, the UE <NUM> may be configured with a plurality of TDM patterns, each associated with a different index value. The UE <NUM> may use the index value received from the second base station <NUM> to determine the TDM pattern corresponding to the received index value.

In some cases, identifying the at least one TDM pattern may include determining the TDM pattern at the UE <NUM> and transmitting an indication of the at least one TDM pattern to the second base station <NUM>. That is, the signaling requesting the TDM pattern transmitted at step 5A and/or 5B of <FIG> may include the indication of the at least one TDM pattern determined by the UE <NUM>. In some cases, the indication of the at least one TDM pattern determined by the UE <NUM> may include an index value associated with the at least one TDM pattern. The index value may be used by the second base station <NUM> to determine the at least one TDM pattern. For example, as noted above, in some cases, a plurality of TDM patterns may be configured, each associated with a different index value. The second base station <NUM> may use the index value received from the second base station <NUM> to determine the TDM pattern corresponding to the received index value. In some cases, the UE <NUM> may transmit the indication of the at least one TDM pattern to the second base station <NUM> in RRC signaling directly to the UE <NUM> (e.g., using the SRB3 bearer) or indirectly to the UE <NUM> (e.g., via the first base station <NUM> in a transparent container).

According to aspects, in the case that the UE <NUM> determines and transmits the indication of the at least one TDM pattern to the second base station <NUM> at step 5A and/or step 5B in <FIG>, the UE <NUM> may receive a confirmation from the second base station <NUM> confirming the at least one TDM pattern. That is, as shown at step <NUM> in <FIG> upon receiving the indication of the at least one TDM pattern from the UE <NUM>, the second base station <NUM> may transmit a confirmation message to the UE <NUM>, confirming and configuring the UE <NUM> with the at least one TDM pattern. At noted above, the confirmation message may be received by the UE <NUM> directly from the second base station <NUM> (e.g., using the SRB3 bearer) or indirectly from the first base station <NUM> (e.g., in a transparent container). In some cases, the confirmation message may indicate an index value associated with the at least one TDM pattern.

According to aspects, at step <NUM> of <FIG>, the UE <NUM> may receive signaling from the second base station <NUM> activating the at least one TDM pattern. According to aspects, in some cases, the signaling from the second base station <NUM> activating the at least one TDM pattern may indicate to the UE <NUM> to start using the at least one TDM pattern when communicating on the second access link and third access link. In some cases, the signaling activating the at least one TDM pattern (e.g., indicating to the UE <NUM> to start using the at least one TDM pattern) may be received in at least one of media access control (MAC) layer signaling or physical (PHY) layer signaling. In some cases, the MAC signaling comprises a MAC control element (MAC-CE) and the PHY layer signaling comprises downlink control information (DCI). In some cases, the MAC layer signaling or the PHY layer signaling may include an index value associated with the at least one TDM pattern. Additionally, in some cases, the UE <NUM> may start using the at least one TDM pattern immediately after receiving the signaling indicating to start/activate the at least one TDM pattern. In other cases, the UE <NUM> may start using the at least one TDM pattern immediately after the UE <NUM> processes the RRC signaling at step <NUM> in <FIG> configuring/confirming the UE <NUM> with the at least one TDM pattern.

According to aspects, in some cases, the signaling from the second base station <NUM> received at step <NUM> in <FIG> may include an indication to change the at least one TDM pattern (e.g., already configured in the UE). For example, in this case, the indication to change the at least one TDM pattern may include an indication of a new TDM pattern to use.

According to aspects, at step <NUM> of <FIG>, the UE <NUM> may tune to the third access link and communicate on the third access link with the third base station <NUM> using the second SIM (e.g., USIM B), for example, during at least one time period of the set of time periods indicated in the TDM pattern. For example, in some cases, during at least one time period of the set of time periods indicated in the TDM pattern the UE <NUM> may transmit or receive signaling and/or data on the third access link. According to aspects, while the UE <NUM> is communicating on the third access link during at least one time period of the set of time periods indicated in the TDM pattern, the second base station <NUM> may reduce or stop transmissions to the UE <NUM> on the second access link. In some cases, during the set of time periods indicated in the TDM pattern the UE <NUM> may use the first access link for uplink transmissions to the first base station <NUM>. Thereafter, outside of the set of time periods indicated in the TDM pattern, the UE <NUM> may autonomously switch to normal operation, such as receiving downlink transmission or transmitting uplink transmissions to the first base station on the first access link.

In some cases, the UE <NUM> may transmit uplink signaling and data on only the first access link during the at least one time period of the set of time periods indicated in the TDM pattern. According to aspects, this may be the case when for when the UE <NUM> is not able to use both links for an uplink split bearer during the at least one time period of the set of time periods indicated in the TDM pattern. In some cases, this may require a specification change to allow this "autonomous" UE <NUM> behavior as the first base station may not be aware of the at least one TDM pattern.

According to aspects, as noted above, the third base station <NUM> may comprise the first base station <NUM>, the second base station <NUM>, or a WN/base station different from the first base station <NUM> and the second base station <NUM>. Accordingly, in some cases, tuning to the third access link for communicating using the second SIM during the at least one time period of the set of time periods indicated in the at least one TDM pattern may comprise one of: communicating with the first base station <NUM> on the third access link using the second SIM, communicating with the second base station <NUM> on the third access link using the second SIM, or communicating with a third base station <NUM> on the third access link using the second SIM that is different from the first base station <NUM> and the second base station <NUM>.

At step <NUM> of <FIG>, the UE <NUM> may transmit a request to the second base station <NUM> to stop using the at least one TDM pattern based on one or more criteria. For example, in some cases, in some cases, the one or more criteria may comprise the commencement of a voice call at the UE <NUM>. In some cases, the request to stop the at least one TDM pattern may be transmitted directly to the second bases station (e.g., using the SRB3 bearer) or indirectly to the second base station <NUM> (e.g., via the first base station <NUM> in a transparent container). In some cases, the UE <NUM> may transmit the request to stop the at least one TDM pattern in a MAC-CE.

In some cases, the request transmitted at step <NUM> of <FIG> may comprise a request to change the at least one TDM pattern. In this case, transmitting the request to change the at least one TDM pattern by the UE <NUM> may comprise transmitting an explicit indication to request the change in the at least one TDM pattern in radio resource control (RRC) signaling. Additionally, in other cases, transmitting the request to change the at least one TDM pattern by the UE <NUM> comprises transmitting an implicit indication to request the change in the at least one TDM pattern in media access control (MAC) signaling. In some cases, the implicit indication may include an index value associated with the at least one TDM pattern.

At step <NUM> of <FIG>, the UE <NUM> may receive an indication from the second base station <NUM> to stop using the at least one TDM pattern. In some cases, the indication from the second base station <NUM> may comprise a confirmation in response to the request to stop using the at least one TDM pattern transmitted by the UE <NUM> in step <NUM> of <FIG>. In other cases, the indication from the second base station <NUM> to stop using the at least one TDM pattern may be transmitted by the second base station <NUM> autonomously, for example, without a request from the UE <NUM>. In some cases, indication from the second base station <NUM> to stop using the at least one TDM pattern may be based on the one or more criteria, such as the second base station <NUM> detecting a commencement of a voice call at the UE <NUM>. According to aspects, in some cases, the indication to stop using the at least one TDM pattern may be received from the second base station <NUM> in at least one of in media access control (MAC) layer signaling or physical (PHY) layer signaling and may comprises an index value associated with the at least one TDM pattern. In some cases, the indication from the second base station <NUM> to stop using the at least one TDM pattern may be received from the first base station <NUM> in a transparent container (e.g., forwarded from the second base station <NUM>) or may be received directly from the second base station <NUM> (e.g., via SRB3).

At step <NUM> of <FIG>, after receiving the indication to stop using the at least one TDM pattern, the UE <NUM> may return to communicating only using the first SIM and may cease communicating on the third access link with the third base station <NUM> (e.g., using the second SIM).

In some cases, the at least one TDM pattern may be periodic, aperiodic, or semi-persistent. For example, when the at least one TDM pattern is periodic, the UE <NUM> may receiving paging or system information on the third access link periodically during the set of time periods indicated in the at least one TDM pattern. In other words, the set of time periods indicated in the at least one TDM pattern may occur periodically. Additionally, in some cases, when the at least one TDM pattern is periodic, the UE <NUM> may transmit a tracking area update (TAU) or a radio access network notification area update (RNAU) periodically during the set of time periods indicated in the at least one TDM pattern.

According to certain aspects, when the at least one TDM pattern is aperiodic, the UE <NUM> may only be configured to communicate during the set of time periods indicated in the at least one TDM pattern once and may not repeat the at least one TDM pattern after the at least one TDM pattern is complete. According to aspects, when the at least one TDM pattern is aperiodic, the UE <NUM> may transmit at least one of a tracking area update (TAU) or a radio access network notification area update (RNAU) during the set of time periods indicated in the at least one TDM pattern due to a mobility decision at the UE <NUM> (e.g., handover and the like).

According to certain aspects, when the at least one TDM pattern is semi-persistently configured, the UE <NUM> may be configured with an indication of when and for how long to use the at least one TDM pattern for communicating on the third access link with the third base station <NUM> using the second SIM.

In some cases, a change in the second base station <NUM> may occur in which the UE <NUM> may be handed over (or may autonomously select) a different second base station <NUM> for communication on the second link using the first SIM. In such a case, if a TDM pattern is configured at the second base station <NUM> and UE <NUM>, the TDM pattern may be released or maintained during the change of second base stations <NUM>. For example, when the UE <NUM> changes second base stations <NUM>, in some cases, the old second base station may inform the new second base station of the TDM pattern configured at the UE <NUM>. In some cases, the old second base station may transmit an indication of the TDM pattern to the new second base station via the first base station <NUM> in a transparent container of an RRC message (e.g., the first base station <NUM> forwards the indication of the TDM pattern to the new second base station). According to aspects, upon receiving the indication of the TDM pattern, the new second base station may decide to release, change, or maintain the TDM pattern with the UE <NUM>.

As noted above, in some cases, when the UE <NUM> is capable of communicating simultaneously on the second access link using the first SIM and the third access link using the second SIM, the UE <NUM> may determine a need for a reduced capability on the second access link. In some cases, the determination may be based on a capability of the UE <NUM> to support communication on the second access link and the third access link simultaneously. Thereafter, the UE <NUM> may transmit an indication of the need for the reduced capability on the second access link to the second base station <NUM>. For example, the indication of the need for the reduced capability on the second access link may indicate to the second base station <NUM> to reduce an amount of transmissions by the second base station <NUM> to the UE <NUM> on the second access link. By reducing the amount of transmission by the second base station <NUM> to the UE <NUM> on the second access link, the UE <NUM> may have enough resources to simultaneously receive transmissions on the third access link (e.g., using the second SIM). Accordingly, after transmitting the indication of the need for the reduced capability on the second access link, the UE <NUM> may communicate on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM. As noted, communicating on the second access link may be performed according to, or at, the reduced capability.

In some cases, transmitting the indication of the need for the reduced capability to the second base station <NUM> may include transmitting the indication directly to the second base station <NUM>. For example, in some cases, the UE <NUM> may transmit the indication using a signaling radio bearer established directly between the UE <NUM> and the second base station <NUM>. In some cases, the signaling bearer may comprise a SRB3 bearer.

In other cases, transmitting the indication of the need for the reduced capability to the second base station <NUM> may comprise transmitting the indication indirectly to the second base station <NUM> via the first base station <NUM>. For example, in this case, the UE <NUM> may transmit the indication to the first base station <NUM> in a transparent container to be forwarded to the second base station <NUM>.

<FIG> is a flow diagram illustrating example operations <NUM> for wireless communication, in accordance with certain aspects of the present disclosure. The operations <NUM> are performed, for example, by UE (e.g., such as a UE 120a in the wireless communication network <NUM>) for multi-universal subscriber identification module (USIM) and dual connectivity operation, as described herein. More specifically, operations <NUM> are performed by the UE for communicating with a BS at a reduced capability, as described herein.

At <NUM>, the UE determines a need for reduced capability on the second access link to communicate on the third access link.

At <NUM>, the UE transmits an indication of the need for the reduced capability to the second base station.

At <NUM>, the UE communicates on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM, wherein communicating on the second access link is at the reduced capability.

<FIG> is a flow diagram illustrating example operations <NUM> for wireless communication, in accordance with certain aspects of the present disclosure. The operations <NUM> may be performed, for example, by base station (e.g., such as a BS <NUM> in the wireless communication network <NUM>) for multi-USIM and dual connectivity operation, as described herein. More specifically, operations <NUM> may be performed by the BS for communicating with a UE at a reduced capability, as described herein.

At <NUM>, the BS receives, from the UE, an indication of a need for reduced capability on the first access link.

At <NUM>, the BS reduces a number of transmissions to the UE on the first access link in response to the indication of the need for the reduced capability.

<FIG> illustrates a communications device <NUM> that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in <FIG>, <FIG>, and <FIG> as well as other operations disclosed herein for multi-USIM and dual connectivity operation.

The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium/memory <NUM> via a bus <NUM>. In certain aspects, the computer-readable medium/memory <NUM> is configured to store instructions (e.g., computer-executable code) that when executed by the processor <NUM>, cause the processor <NUM> to perform the operations illustrated in <FIG>, <FIG>, and <FIG>, or other operations for performing the various techniques discussed herein for multi-USIM and dual connectivity operation. In certain aspects, computer-readable medium/memory <NUM> stores code for performing the operations illustrated in one or more of <FIG>, <FIG>, and <FIG> as well as other operations disclosed herein for multi-USIM and dual connectivity operation. For example, computer-readable medium/memory <NUM> stores code for establishing <NUM>, code for identifying <NUM>, code for tuning <NUM>, code for transmitting <NUM>, code for determining <NUM>, code for communicating <NUM>, and code for receiving <NUM>.

In some cases, the code for establishing <NUM> may include code for establishing a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station.

Additionally, in some cases, the code for establishing <NUM> may include code for establishing a second access link, associated with the first SIM of the UE, for communicating with a second base station.

Additionally, in some cases, the code for establishing <NUM> may include code for establishing a third access link associated with a second SIM of the UE.

In some cases, the code for identifying <NUM> may include code for identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to use the third access link.

In some cases, the code for tuning <NUM> may include code for tuning to the third access link for communicating using the second SIM during at least one time period of the set of time periods indicated in the TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting an indication of the at least one TDM pattern to the second base station. In some cases, the code for transmitting <NUM> may include code for transmitting the indication of the at least one TDM pattern directly to the second base station. In some cases, the code for transmitting <NUM> may include code for transmitting the indication of the at least one TDM pattern to the second base station via the first base station. In some cases, the code for transmitting <NUM> may include code for transmitting the indication of the at least one TDM pattern to the first base station using a transparent container.

In some cases, the code for receiving <NUM> may include code for receiving a confirmation from the second base station confirming the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting an index value associated with the at least one TDM pattern.

In some cases, the code for receiving <NUM> may include code for receiving an indication of the at least one TDM pattern from the second base station.

In some cases, the code for identifying <NUM> may include code for identifying the at least one TDM pattern is based on the index value.

In some cases, the code for receiving <NUM> may include code for receiving signaling indicating to start the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting, based on one or more criteria, a request to the second base station to stop the at least one TDM pattern.

In some cases, the code for receiving <NUM> may include code for receiving an indication from the second base station to stop the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting, to the second base station, a request to change the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting an explicit indication to request the change in the at least one TDM pattern in radio resource control (RRC) signaling.

In some cases, the code for transmitting <NUM> may include code for transmitting an implicit indication to request the change in the at least one TDM pattern in media access control (MAC) signaling.

In some cases, the code for receiving <NUM> may include code for receiving paging or system information on the third access link periodically during the set of time periods indicated in the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting a tracking area update (TAU) or a radio access network notification area update (RNAU) periodically during the set of time periods indicated in the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting at least one of a tracking area update (TAU) or a radio access network notification area update (RNAU) during the set of time periods indicated in the at least one TDM pattern due to a mobility decision.

In some cases, the code for transmitting <NUM> may include code for transmitting an uplink transmission using the first access link during at least one time period of the set of time periods indicated in the at least one TDM pattern.

In some cases, the code for communicating <NUM> may include code for communicating with the first base station on the third access link using the second SIM.

In some cases, the code for communicating <NUM> may include code for communicating with the second base station on the third access link using the second SIM.

In some cases, the code for communicating <NUM> may include code for communicating with a third base station on the third access link using the second SIM.

In some cases, the code for transmitting <NUM> may include code for transmitting an indication to the second base station indicating a reduced capability for the second access link.

In some cases, the code for transmitting <NUM> may include code for transmitting uplink signaling and data on only the first access link during the at least one time period of the set of time periods indicated in the TDM pattern.

In some cases, the code for determining <NUM> may include code for determining a need for reduced capability on the second access link to communicate on the third access link.

In some cases, the code for transmitting <NUM> may include code for transmitting an indication of the need for the reduced capability to the second base station.

In some cases, the code for communicating <NUM> may include code for communicating on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM.

In some cases, the code for transmitting <NUM> may include code for transmitting the indication of the need for the reduced capability directly to the second base station.

In some cases, the code for transmitting <NUM> may include code for transmitting the indication of the need for the reduced capability using a signaling radio bearer established directly between the UE and the second base station.

In some cases, the code for transmitting <NUM> may include code for transmitting the indication of the need for the reduced capability indirectly to the second base station via the first base station.

In some cases, the code for transmitting <NUM> may include code for transmitting the indication of the need for the reduced capability to the first base station in a transparent container to be forwarded to the second base station.

In certain aspects, the processor <NUM> may include circuitry configured to implement the code stored in the computer-readable medium/memory <NUM>, such as for performing the operations illustrated in <FIG>, <FIG>, and <FIG> as well as other operations disclosed herein for multi-USIM and dual connectivity operation. For example, the processor <NUM> includes circuitry for establishing <NUM>, circuitry for identifying <NUM>, circuitry for tuning <NUM>, circuitry for transmitting <NUM>, circuitry for determining <NUM>, circuitry for communicating <NUM>, and circuitry for receiving <NUM>.

In some cases, the circuitry for establishing <NUM> may include circuitry for establishing a first access link, associated with a first subscriber identification module (SIM) of the UE, for communicating with a first base station.

Additionally, in some cases, the circuitry for establishing <NUM> may include circuitry for establishing a second access link, associated with the first SIM of the UE, for communicating with a second base station.

Additionally, in some cases, the circuitry for establishing <NUM> may include circuitry for establishing a third access link associated with a second SIM of the UE.

In some cases, the circuitry for identifying <NUM> may include circuitry for identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods during which to use the third access link.

In some cases, the circuitry for tuning <NUM> may include circuitry for tuning to the third access link for communicating using the second SIM during at least one time period of the set of time periods indicated in the TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an indication of the at least one TDM pattern to the second base station. In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting the indication of the at least one TDM pattern directly to the second base station. In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting the indication of the at least one TDM pattern to the second base station via the first base station. In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting the indication of the at least one TDM pattern to the first base station using a transparent container.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving a confirmation from the second base station confirming the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an index value associated with the at least one TDM pattern.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving an indication of the at least one TDM pattern from the second base station.

In some cases, the circuitry for identifying <NUM> may include circuitry for identifying the at least one TDM pattern is based on the index value.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving signaling indicating to start the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting, based on one or more criteria, a request to the second base station to stop the at least one TDM pattern.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving an indication from the second base station to stop the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting, to the second base station, a request to change the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an explicit indication to request the change in the at least one TDM pattern in radio resource control (RRC) signaling.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an implicit indication to request the change in the at least one TDM pattern in media access control (MAC) signaling.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving paging or system information on the third access link periodically during the set of time periods indicated in the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting a tracking area update (TAU) or a radio access network notification area update (RNAU) periodically during the set of time periods indicated in the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting at least one of a tracking area update (TAU) or a radio access network notification area update (RNAU) during the set of time periods indicated in the at least one TDM pattern due to a mobility decision.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an uplink transmission using the first access link during at least one time period of the set of time periods indicated in the at least one TDM pattern.

In some cases, the circuitry for communicating <NUM> may include circuitry for communicating with the first base station on the third access link using the second SIM.

In some cases, the circuitry for communicating <NUM> may include circuitry for communicating with the second base station on the third access link using the second SIM.

In some cases, the circuitry for communicating <NUM> may include circuitry for communicating with a third base station on the third access link using the second SIM.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an indication to the second base station indicating a reduced capability for the second access link.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting uplink signaling and data on only the first access link during the at least one time period of the set of time periods indicated in the TDM pattern.

In some cases, the circuitry for determining <NUM> may include circuitry for determining a need for reduced capability on the second access link to communicate on the third access link.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an indication of the need for the reduced capability to the second base station.

In some cases, the circuitry for communicating <NUM> may include circuitry for communicating on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting the indication of the need for the reduced capability directly to the second base station.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting the indication of the need for the reduced capability using a signaling radio bearer established directly between the UE and the second base station.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting the indication of the need for the reduced capability indirectly to the second base station via the first base station.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting the indication of the need for the reduced capability to the first base station in a transparent container to be forwarded to the second base station.

The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium/memory <NUM> via a bus <NUM>. In certain aspects, the computer-readable medium/memory <NUM> is configured to store instructions (e.g., computer-executable code) that when executed by the processor <NUM>, cause the processor <NUM> to perform the operations illustrated in <FIG>, <FIG>, and <FIG>, or other operations for performing the various techniques discussed herein for multi-USIM and dual connectivity operation. In certain aspects, computer-readable medium/memory <NUM> stores code for performing the operations illustrated in one or more of <FIG>, <FIG>, and <FIG> as well as other operations disclosed herein for multi-USIM and dual connectivity operation. For example, computer-readable medium/memory <NUM> stores code for establishing <NUM>, code for identifying <NUM>, code for reducing or stopping <NUM>, code for receiving <NUM>, and code for transmitting <NUM>.

In some cases, the code for establishing <NUM> may include code for establishing a first access link for communicating with a user equipment.

In some cases, the code for identifying <NUM> may include code for identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods for the UE to use to tune to a second access link for communicating with a second base station.

In some cases, the code for reducing or stopping <NUM> may include code for reducing or stopping transmissions to the UE on the first access link during at least one time period of the set of time periods.

In some cases, the code for receiving <NUM> may include code for receiving an indication of the at least one TDM pattern to the second base station, wherein identifying the at least one TDM pattern is based on the received indication of the at least one TDM pattern.

In some cases, the code for receiving <NUM> may include code for receiving the indication of the at least one TDM pattern indirectly from the UE via a third base station.

In some cases, the code for receiving <NUM> may include code for receiving the indication of the TDM pattern from the third base station in a transparent container.

In some cases, the code for transmitting <NUM> may include code for transmitting a confirmation to the UE confirming the at least one TDM pattern.

In some cases, the code for receiving <NUM> may include code for receiving the indication of the at least one TDM pattern from the UE comprises receiving an index value associated with the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting an indication of the at least one TDM pattern to the UE.

In some cases, the code for transmitting <NUM> may include code for transmitting signaling indicating to start the at least one TDM pattern, wherein the signaling comprise at least one of media access control (MAC) layer signaling or physical (PHY) layer signaling.

In some cases, the code for receiving <NUM> may include code for receiving, based on one or more criteria, a request to the second base station to stop the at least one TDM pattern.

In some cases, the code for transmitting <NUM> may include code for transmitting an indication to stop the at least one TDM pattern to the UE.

In some cases, the code for receiving <NUM> may include code for receiving, from the UE, a request to change the at least one TDM pattern.

In some cases, the code for receiving <NUM> may include code for receiving an explicit indication to request the change in the at least one TDM pattern in radio resource control (RRC) signaling.

In some cases, the code for receiving <NUM> may include code for receiving an implicit indication to request the change in the at least one TDM pattern in media access control (MAC) signaling.

In some cases, the code for receiving <NUM> may include code for receiving an indication from the UE indicating a reduced capability for the first access link.

In some cases, the code for receiving <NUM> may include code for receiving, from the UE, an indication of a need for reduced capability on the first access link.

In some cases, the code for reducing or stopping <NUM> may include code for reducing a number of transmissions to the UE on the first access link in response to the indication of the need for the reduced capability.

In some cases, the code for receiving <NUM> may include code for receiving the indication of the need for the reduced capability directly from the UE.

In some cases, the code for receiving <NUM> may include code for receiving the indication using a signaling radio bearer established directly between the UE and the first base station.

In some cases, the code for receiving <NUM> may include code for receiving the indication indirectly from the UE via a second base station.

In certain aspects, the processor <NUM> may include circuitry configured to implement the code stored in the computer-readable medium/memory <NUM>, such as for performing the operations illustrated in <FIG>, <FIG>, and <FIG> as well as other operations disclosed herein for multi-USIM and dual connectivity operation. For example, the processor <NUM> includes circuitry for establishing <NUM>, circuitry for identifying <NUM>, circuitry for reducing or stopping <NUM>, circuitry for receiving <NUM>, and circuitry for transmitting <NUM>.

In some cases, the circuitry for establishing <NUM> may include circuitry for establishing a first access link for communicating with a user equipment.

In some cases, the circuitry for identifying <NUM> may include circuitry for identifying at least one time division multiplexing (TDM) pattern indicating a set of time periods for the UE to use to tune to a second access link for communicating with a second base station.

In some cases, the circuitry for reducing or stopping <NUM> may include circuitry for reducing or stopping transmissions to the UE on the first access link during at least one time period of the set of time periods.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving an indication of the at least one TDM pattern to the second base station, wherein identifying the at least one TDM pattern is based on the received indication of the at least one TDM pattern.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving the indication of the at least one TDM pattern indirectly from the UE via a third base station.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving the indication of the TDM pattern from the third base station in a transparent container.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting a confirmation to the UE confirming the at least one TDM pattern.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving the indication of the at least one TDM pattern from the UE comprises receiving an index value associated with the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an indication of the at least one TDM pattern to the UE.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting signaling indicating to start the at least one TDM pattern, wherein the signaling comprise at least one of media access control (MAC) layer signaling or physical (PHY) layer signaling.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving, based on one or more criteria, a request to the second base station to stop the at least one TDM pattern.

In some cases, the circuitry for transmitting <NUM> may include circuitry for transmitting an indication to stop the at least one TDM pattern to the UE.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving, from the UE, a request to change the at least one TDM pattern.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving an explicit indication to request the change in the at least one TDM pattern in radio resource control (RRC) signaling.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving an implicit indication to request the change in the at least one TDM pattern in media access control (MAC) signaling.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving an indication from the UE indicating a reduced capability for the first access link.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving, from the UE, an indication of a need for reduced capability on the first access link.

In some cases, the circuitry for reducing or stopping <NUM> may include circuitry for reducing a number of transmissions to the UE on the first access link in response to the indication of the need for the reduced capability.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving the indication of the need for the reduced capability directly from the UE.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving the indication using a signaling radio bearer established directly between the UE and the first base station.

In some cases, the circuitry for receiving <NUM> may include circuitry for receiving the indication indirectly from the UE via a second base station.

Reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more.

In the case of a user equipment <NUM> (see <FIG>), a user interface (e.g., keypad, display, mouse, joystick, etc.) may also be connected to the bus.

For example, such a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein, for example, instructions for performing the operations described herein and illustrated in <FIG> and other operations for performing the various techniques discussed herein for multi-universal subscriber identification module (USIM) and dual connectivity operation.

Claim 1:
A method performed by a user equipment, UE (<NUM>) for wireless communication, comprising:
establishing (<NUM>) a first access link, associated with a first subscriber identification module, SIM, of the UE, for communicating with a first base station;
establishing (<NUM>) a second access link, associated with the first SIM of the UE, for communicating with a second base station;
establishing (<NUM>) a third access link associated with a second SIM of the UE;
determining (<NUM>) a need for reduced capability on the second access link to communicate on the third access link;
transmitting (<NUM>) an indication of the need for the reduced capability to the second base station; and
communicating (<NUM>) on the third access link using the second SIM simultaneously with communicating on the second access link using the first SIM, wherein communicating on the second access link is at the reduced capability.