Patent Description:
Document <NPL> discusses enhancements on SRS flexibility, coverage and capacity. Document <NPL>, as well as patent documents <CIT> and <CIT> are also referenced.

A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, an/or a CQI parameter, among other examples.

The transceiver may be used by a processor (e.g., controller/processor <NUM>) and memory <NUM> to perform aspects of any of the methods described herein.

The transceiver may be used by a processor (e.g., controller/processor <NUM>) and memory <NUM> to perform aspects of any of the methods described herein.

Controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform one or more techniques associated with reordering an antenna order to avoid transmit blanking, as described in more detail elsewhere herein. For example, controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform or direct operations of, for example, process <NUM> of <FIG> and/or other processes as described herein. Memories <NUM> and <NUM> may store data and program codes for base station <NUM> and UE <NUM>, respectively. In some aspects, memory <NUM> and/or memory <NUM> may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base station <NUM> and/or the UE <NUM>, may cause the one or more processors, the UE <NUM>, and/or the base station <NUM> to perform or direct operations of, for example, process <NUM> of <FIG> and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions.

In some aspects, the UE includes means for identifying at least one collision between a periodic reporting of channel state information associated with a first RAT and a periodic reference signal transmission associated with a second RAT, wherein each reference signal transmission of the periodic reference signal transmission is sequentially transmitted via a plurality of antennas based at least in part on a first antenna order; and/or means for determining a second antenna order for the periodic reference signal transmission that resolves the at least one collision; and/or means for transmitting the periodic reference signal transmission using the second antenna order. The means for the UE to perform operations described herein may include, for example, antenna <NUM>, demodulator <NUM>, MIMO detector <NUM>, receive processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, modulator <NUM>, controller/processor <NUM>, and/or memory <NUM>.

In some aspects, the UE includes means for determining that the at least one collision can be resolved by modifying the first antenna order, wherein the determination of the second antenna order is based at least in part on the determination that the at least one collision can be resolved by modifying the first antenna order.

In some aspects, the UE includes means for determining that blanking of the periodic reporting associated with the first RAT is to be performed if the second antenna order is not used, wherein the determination of the second antenna order is based at least in part on the determination that blanking of the periodic reporting associated with the first RAT is to be performed if the second antenna order is not used.

<FIG> is a diagram illustrating an example <NUM> of dual connectivity, in accordance with the present disclosure. The example shown in <FIG> is for an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA)-NR dual connectivity (ENDC) mode. In the ENDC mode, a UE <NUM> communicates using an LTE RAT on a master cell group (MCG), and the UE <NUM> communicates using an NR RAT on a secondary cell group (SCG). However, aspects described herein may apply to an ENDC mode (e.g., where the MCG is associated with an LTE RAT, and the SCG is associated with an NR RAT), an NR-E-UTRA dual connectivity (NEDC) mode (e.g., where the MCG is associated with an NR RAT, and the SCG is associated with an LTE RAT), an NR dual connectivity (NRDC) mode (e.g., where the MCG is associated with an NR RAT, and the SCG is also associated with the NR RAT), or another dual connectivity mode (e.g., where the MCG is associated with a first RAT, and the SCG is associated with one of the first RAT or a second RAT). The ENDC mode is sometimes referred to as an NR or <NUM> non-standalone (NSA) mode. Thus, as used herein, a dual connectivity mode may refer to an ENDC mode, a NEDC mode, an NRDC mode, and/or another type of dual connectivity mode.

As shown in <FIG>, a UE <NUM> may communicate with both an eNB (e.g., a <NUM> base station <NUM>) and a gNB (e.g., a <NUM> base station <NUM>), and the eNB and the gNB may communicate (e.g., directly or indirectly) with a <NUM>/LTE core network, shown as an evolved packet core (EPC) that includes a mobility management entity (MME), a packet data network gateway (PGW), a serving gateway (SGW), and/or the like. In <FIG>, the PGW and the SGW are shown collectively as P/SGW. In some aspects, the eNB and the gNB may be co-located at the same base station <NUM>. In some aspects, the eNB and the gNB may be included in different base stations <NUM> (i.e., may not be co-located).

As further shown in <FIG>, in some aspects, a wireless network that permits operation in a <NUM> NSA mode may permit such operations using an MCG for a first RAT (e.g., an LTE RAT, a <NUM> RAT, and/or the like) and an SCG for a second RAT (e.g., an NR RAT, a <NUM> RAT, and/or the like). In this case, the UE <NUM> may communicate with the eNB via the MCG and may communicate with the gNB via the SCG. In some aspects, the MCG may anchor a network connection between the UE <NUM> and the <NUM>/LTE core network (e.g., for mobility, coverage, control plane information, and/or the like), and the SCG may be added as additional carriers to increase throughput (e.g., for data traffic, user plane information, and/or the like). In some aspects, the gNB and the eNB may not transfer user plane information between one another. In some aspects, a UE <NUM> operating in a dual connectivity mode may be concurrently connected with an LTE base station <NUM> (e.g., an eNB) and an NR base station <NUM> (e.g., a gNB) (e.g., in the case of ENDC or NEDC). Alternatively, in some aspects, a UE <NUM> may be concurrently connected with one or more base stations <NUM> that use the same RAT (e.g., in the case of NRDC). In some aspects, the MCG may be associated with a first frequency band (e.g., a sub-<NUM> band and/or an FR1 band), and the SCG may be associated with a second frequency band (e.g., a millimeter wave band and/or an FR2 band).

The UE <NUM> may communicate via the MCG and the SCG using one or more radio bearers (e.g., data radio bearers (DRBs), signaling radio bearers (SRBs), and/or the like). For example, the UE <NUM> may transmit or receive data via the MCG and/or the SCG using one or more DRBs. Similarly, the UE <NUM> may transmit or receive control information (e.g., radio resource control (RRC) information, measurement reports, and/or the like) using one or more SRBs. In some aspects, a radio bearer may be dedicated to a specific cell group (e.g., a radio bearer may be an MCG bearer, an SCG bearer, and/or the like). In some aspects, a radio bearer may be an SRB. An SRB may be split in the uplink and/or in the downlink. For example, a DRB may be split on the downlink (e.g., the UE <NUM> may receive downlink information for the MCG or the SCG in the DRB) but not on the uplink (e.g., the uplink may be non-split with a primary path to the MCG or the SCG, such that the UE <NUM> transmits in the uplink only on the primary path). In some aspects, a DRB may be split on the uplink with a primary path to the MCG or the SCG. A DRB that is split in the uplink may transmit data using the primary path until a size of an uplink transmit buffer satisfies an uplink data split threshold. If the uplink transmit buffer satisfies the uplink data split threshold, the UE <NUM> may transmit data to the MCG or the SCG using the DRB.

<FIG> is a diagram illustrating an example <NUM> of a set of radio frequency (RF) chains of a UE, in accordance with the present disclosure. <FIG> shows a transceiver <NUM>, a set of cross-switches <NUM>-<NUM> and <NUM>-<NUM>, and a set of antennas <NUM>-<NUM> through <NUM>-<NUM>. The set of antennas <NUM> are grouped into an upper antenna set, which may be situated in an upper region of the UE, and a lower antenna set, which may be situated in a lower region of the UE. Thus, antenna diversity is achieved in situations where one of the upper region or the lower region of the UE may be impeded, for example, by a user's hand or other blockage.

A cross-switch <NUM> may provide for an input signal to be switched from one antenna <NUM> to another antenna <NUM>, or for a signal received from an antenna <NUM> to be switched from one receive path to another receive path. A cross-switch <NUM> may be a hardware component (e.g., a physical switch) or may be implemented in the baseband via precoding and/or the like. A cross-switch configuration may indicate how signals are mapped to antennas by a cross-switch <NUM>. In some aspects, a cross-switch <NUM> may implement an antenna switching configuration, such as an antenna switching diversity configuration, which may improve antenna diversity of transmissions of the UE.

An antenna <NUM> may be antenna <NUM> and/or the like. An antenna <NUM> can perform reception, transmission, or a combination thereof. For example, a RAT may be associated with one or more receive antennas and one or more transmit antennas. In example <NUM>, there are two RATs: an LTE RAT associated with band B3, and an NR RAT associated with band N41. For example, the UE of example <NUM> may be associated with an ENDC configuration, wherein the LTE RAT is associated with a primary cell (PCell) and the NR RAT is associated with a primary secondary cell (PSCell). The NR RAT and the LTE RAT may both be associated with <NUM> receive antennas and <NUM> transmit antenna, which is denoted by 1T4R. Furthermore, each of the NR RAT and the LTE RAT may be associated with a primary receive (PRX) antenna.

Some transmissions may be performed using an antenna order. An antenna order may define an order in which antennas <NUM> are to be sequentially used to perform a transmission. As an example, a sounding reference signal (SRS) may be transmitted using an antenna order in order to improve transmit diversity. An SRS is a signal used to sound parts of the spectrum that are not in use by an allocated resource block, in order for a base station to estimate channel quality. In the course of transmitting the SRS using the antenna order, the UE may switch an antenna used for a current physical uplink shared channel (PUSCH) to a different antenna used for reception in a current operating frequency channel (e.g., associated with an absolute radiofrequency channel number (ARFCN)). The base station may use the SRS for improve downlink precoding, thereby improving downlink MIMO performance. As an example of an antenna order, the SRS may be transmitted on antennas <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, and <NUM>-<NUM> in order, which may be represented by (<NUM>,<NUM>,<NUM>,<NUM>). In <FIG>, the SRS antenna order is represented by the numbers in brackets (for example, the [<NUM>] shown by reference number <NUM> indicates that antenna <NUM>-<NUM> is a fourth antenna in the antenna order). The SRS transmission may be performed periodically (e.g., in accordance with a periodicity).

The UE of example <NUM> may share RF front end (RFFE) resources (e.g., cross-switch <NUM>, antenna <NUM>, and/or the like) between the LTE RAT and the NR RAT. In some circumstances, a communication associated with a first RAT (e.g., the NR RAT) may utilize RFFE resources that would otherwise be used for a concurrent communication associated with a second RAT (e.g., the LTE RAT). This is referred to as a collision of the communication associated with the first RAT and the communication associated with the second RAT. In example <NUM>, the transmission of the SRS on antenna <NUM> may collide with an LTE transmission on antenna <NUM>, as shown by reference number <NUM>. For example, the cross-switch <NUM>-<NUM> may route the B3 Tx (labeled as B3 TX/RX0 (PRX)) to the antenna <NUM>-<NUM>, which is concurrently used for SRS transmission. Furthermore, in some scenarios, an uplink transmission on the second RAT (e.g., a CQI, a rank indicator (RI), and/or the like) may be periodic and may repeatedly collide with an uplink transmission on the first RAT. For example, if the uplink transmission on the first RAT is an SRS associated with an antenna order, the uplink transmission on the second RAT may repeatedly collide with the SRS transmission on a particular antenna based at least in part on the antenna order. Persistent collisions may impact throughput and radio link quality on the second RAT.

In such a scenario, the UE may drop the communication associated with the second RAT (which is referred to herein as blanking a communication associated with the second RAT). However, blanking the communication associated with the second RAT negatively impacts block error rate (BLER) on the connection associated with the second RAT, which could lead to diminished throughput and radio link failure (RLF). RLF of an LTE connection for an ENDC UE may be particularly problematic since the LTE connection is associated with the PCell.

Some techniques and apparatuses described herein provide for an antenna order of a periodic reference signal transmission to be modified based at least in part on identifying one or more collisions between the periodic reference signal transmission and a periodic transmission (e.g., a control channel transmission, a periodic reporting of channel state information, an idle mode reception operation, and/or the like). For example, the UE may identify at least one collision between the periodic reference signal transmission and the periodic transmission and may modify the antenna order of the periodic reference signal transmission based at least in part on the at least one collision. The modified antenna order may be configured such that the at least one collision is eliminated, or so that a frequency of collisions between the periodic reference signal transmission and the periodic transmission is reduced. For example, for an antenna order of [<NUM><NUM><NUM><NUM>] for transmission of an SRS, where a collision occurs on antenna <NUM>, the antenna order may be modified to (for example) [<NUM><NUM><NUM><NUM>], so that the SRS transmission on antenna <NUM> is transmitted at a different time than the colliding collision.

In this way, an impact of collisions between periodic communications, such as collisions between NR SRS transmissions and LTE channel state information (CSI) transmissions or idle mode reception operations, is reduced. Thus, throughput is improved and impact on the communication link is mitigated.

<FIG> is a diagram illustrating an example <NUM> of identifying and mitigating a collision based at least in part on an antenna order for a reference signal transmission, in accordance with the present disclosure. The operations described with regard to <FIG> may be performed by a UE (e.g., UE <NUM>, the UE of example <NUM>). For example, as shown by block <NUM>, the UE may be in an ENDC mode, wherein an LTE connection and an NR connection share cross-switches, as described in more detail in connection with <FIG>.

As shown by block <NUM>, the UE may determine whether any NR SRS path shares an antenna with an LTE transmission. The LTE transmission may be referred to herein as a periodic reporting of CSI, a CSI transmission, or a CQI/RI transmission, among other examples. For example, the UE may determine whether any antenna of the UE is shared between an NR connection and an LTE connection. As an example, antenna <NUM>-<NUM> of <FIG> is shared between the LTE transmission and the NR SRS transmission. An NR SRS path refers to a transmit path used for an NR SRS. For example, an SRS transmitted using the antenna order [<NUM><NUM><NUM><NUM>] of <FIG> may be associated with NR SRS paths on each of antennas <NUM>-<NUM> through <NUM>-<NUM>. In some aspects, the UE may determine whether any NR SRS path collides with an LTE Tx antenna at every LTE/NR configuration or reconfiguration, or at every LTE/NR antenna switching configuration. If no NR SRS path shares an antenna with an LTE transmission (block <NUM> - No), the UE may return to a start of example <NUM>, at block <NUM>.

If an NR SRS path shares an antenna with an LTE transmission (block <NUM> - Yes), the UE may determine whether the LTE transmission is associated with a persistent collision with the NR SRS (block <NUM>). For example, the UE may identify one or more collisions between the LTE transmission and the NR SRS. In some aspects, the UE may determine whether an LTE CQI or RI transmit antenna is associated with a persistent collision with an NR SRS path at every LTE/NR configuration or reconfiguration or LTE/NR antenna switching configuration.

In some aspects, the UE may determine if a periodicity of an LTE transmission (e.g., a CQI/RI transmission) modulo a periodicity of an NR transmission (e.g., an SRS transmission) is zero with regard to a common time reference. For example, the UE may determine if the periodicity of the periodic reference signal transmission and the periodicity of the periodic reporting are aligned with each other. For example, if the LTE transmission's periodicity is <NUM> and the NR transmission's periodicity is <NUM>, only the SRS transmission on the SRS path that is colliding with the LTE transmission's Tx antenna needs to be suspended, whereby the periodicity to suspend corresponds to the LTE transmission's periodicity (e.g., <NUM>). If the LTE transmission's periodicity is smaller than the NR transmission's periodicity, then from LTE transmission's perspective, the SRS cannot collide persistently.

In some aspects, the UE may account for pre-subframe or post-subframe procedures associated with the LTE transmission. For example, the UE, when identifying the at least one collision, may use an LTE subframe plus some amount of time before and/or after the subframe, to account for pre-subframe or post-subframe activities. In some aspects, the UE may determine a length of the NR transmission in terms of symbols (e.g., <NUM> symbol, <NUM> symbols, <NUM> symbols, and/or the like).

In some aspects, different LTE transmissions may have different periodicities. For example, a CQI may be associated with a different periodicity than an RI. In this case, if either periodicity has a persistent collision, the UE may identify at least one collision (e.g., may determine that a criterion for identifying a persistent collision associated with an LTE transmit antenna is satisfied).

In some aspects, the UE may determine whether at least one collision is detected based at least in part on information received from an LTE protocol stack and an NR protocol stack of the UE. For example, the UE may acquire, from the LTE protocol stack and/or the NR protocol stack, information indicating a configuration for an LTE transmission (e.g., a CSI configuration) and an NR transmission (e.g., an SRS configuration).

In some aspects, the UE may determine whether blanking of the LTE transmission or the NR SRS transmission is to be performed. For example, a UE may be associated with a sufficient number of antennas to perform both the LTE transmission and the NR SRS transmission (e.g., <NUM> antennas, <NUM> antennas, and/or the like). In such a case, if the UE is associated with a sufficient number of antennas to perform both the LTE transmission and the NR SRS transmission, the UE may determine that the LTE transmission needs not be blanked and the SRS transmission's antenna order needs not be modified, thereby conserving resources that would otherwise be used to modify the antenna order of the NR SRS transmission or blank at least one of the NR SRS transmission or the LTE transmission.

If the LTE transmission is not associated with a persistent collision with the NR SRS (block <NUM> - No) then the UE may return to block <NUM>. If the LTE transmission is associated with a persistent collision with the NR SRS (block <NUM> - Yes), then the UE may determine whether modifying an antenna order of the NR SRS resolves the at least one collision. For example, the UE may determine whether swapping an order of the NR SRS transmission on the SRS path resolves the persistent collision with the LTE transmission (e.g., the LTE CSI transmission). If modifying the antenna order of the NR SRS does not resolve the at least one collision (block <NUM> - No), then the UE may blank the NR SRS transmission (block <NUM>). For example, the UE may blank the NR SRS transmission on a time occasion in which the NR SRS transmission collides with the LTE transmission. In some aspects, the UE may blank one or more SRS transmission instances that overlap with any portion of the LTE transmission.

If modifying the antenna order of the NR SRS resolves the at least one collision (block <NUM> - Yes), then the UE may modify the antenna order of the NR SRS (block <NUM>), and may return to block <NUM>. For example, the UE may determine a second antenna order that is different than a first antenna order for the NR SRS transmission. The second antenna order may be configured such that the NR SRS does not collide with the LTE transmission. In this way, an impact of periodic SRS transmission on LTE transmissions is reduced, thereby improving throughput and BLER of the LTE connection and reducing BLER on the LTE connection.

The below pseudocode illustrates an example process relating to example <NUM>. In the below pseudocode, /* and */ delimit code comments. For example, /* ABC */ is a code comment of "ABC. " Lines of pseudocode are numbered sequentially.

In the above pseudocode, the UE determines a default SRS transmission antenna order of (<NUM>,<NUM>,<NUM>,<NUM>). The UE also generates non-default SRS transmission antenna orders of (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), and (<NUM>,<NUM>,<NUM>,<NUM>). If the UE identifies a colliding antenna, for item-X, is antenna <NUM> (i.e., the last antenna of the default SRS transmission order), then the UE may select, from the non-default SRS transmission antenna orders, a set of antenna orders in which antenna <NUM> is in a different position in the default SRS antenna order. In this example, the UE may select one of (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), and (<NUM>,<NUM>,<NUM>,<NUM>). The UE may set the SRS transmission's antenna order to the selected non-default SRS antenna order.

In the above pseudocode, the determination of whether to suspend SRS antenna switching for a corresponding colliding time occurrence is based at least in part on a duty cycle associated with a configurable value Y. Example values of <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> are provided for Y. Example actions corresponding to the values of Y are provided below:.

Thus, the NR SRS is blanked every Y colliding instances. In some aspects, an antenna order of the UE indicate the colliding instances that are to be blanked. In some aspects, the UE may determine the colliding instances to be blanked independently of the antenna order.

In some aspects, the UE may receive configuration information (e.g., RRC reconfiguration information for the LTE RAT or the NR RAT) that modifies the periodicity of the SRS transmission or the LTE transmission. The UE may start from block <NUM> based at least in part on receiving such information. For example, the UE (e.g., a software module of the UE) may be notified if there is an LTE or NR reconfiguration that impacts the LTE connection's CQI/RI periodicity or the NR connection's SRS periodicity.

<FIG> is a diagram illustrating a process <NUM> performed by a UE, in accordance with the claimed invention. Process <NUM> is an example where the UE (e.g., UE <NUM>) performs operations associated with reordering an antenna order to avoid transmit blanking.

As shown in <FIG>, and according to the claimed invention, process <NUM> includes identifying at least one collision between a periodic reporting of channel state information associated with a first RAT and a periodic reference signal transmission associated with a second RAT, wherein each reference signal transmission of the periodic reference signal transmission is sequentially transmitted via a plurality of antennas based at least in part on a first antenna order (block <NUM>). For example, the UE (e.g., using identification component <NUM>, depicted in <FIG>) may identify at least one collision between a periodic reporting of channel state information associated with a first RAT and a periodic reference signal transmission associated with a second RAT, wherein each reference signal transmission of the periodic reference signal transmission is sequentially transmitted via a plurality of antennas based at least in part on a first antenna order, as described above.

As further shown in <FIG>, and according to the claimed invention, process <NUM> includes determining a second antenna order for the periodic reference signal transmission that resolves the at least one collision (block <NUM>). For example, the UE (e.g., using determination component <NUM>, depicted in <FIG>) may determine a second antenna order for the periodic reference signal transmission that resolves the at least one collision, as described above. In some aspects, "resolving the at least one collision" may include partially resolving the at least one collision. For example, the second antenna order may minimize the number of remaining collisions relative to one or more other potential antenna orders. As another example, the second antenna order may resolve the at least one collision, though other collisions may remain. As used herein, "resolving a collision" refers to eliminating the need to drop one of the periodic reference signal transmission or the periodic reporting at a time associated with the at least one collision. In some aspects, the at least one collision is a persistent collision, where a persistent collision is based at least in part on respective periodicities of the periodic reference signal transmission and the periodic reporting causing the two communications to overlap on a repeated basis.

As further shown in <FIG>, and according to the claimed invention, process <NUM> includes transmitting the periodic reference signal transmission using the second antenna order (block <NUM>). For example, the UE (e.g., using transmission component <NUM>, depicted in <FIG>) may transmit the periodic reference signal transmission using the second antenna order, as described above.

In a first aspect, the first antenna order uses a first order of the plurality of antennas and the second antenna order uses a second order of the plurality of antennas.

In a second aspect, alone or in combination with the first aspect, the periodic reporting is associated with a channel quality indicator or a rank indicator, and wherein the periodic reference signal transmission is associated with a sounding reference signal.

In a third aspect, alone or in combination with one or more of the first and second aspects, process <NUM> includes determining that the at least one collision can be resolved by modifying the first antenna order, wherein the determination of the second antenna order is based at least in part on the determination that the at least one collision can be resolved by modifying the first antenna order.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, process <NUM> includes determining that blanking of the periodic reporting associated with the first RAT is to be performed if the second antenna order is not used, wherein the determination of the second antenna order is based at least in part on the determination that blanking of the periodic reporting associated with the first RAT is to be performed if the second antenna order is not used.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the identification of the at least one collision is based at least in part on a periodicity of the periodic reference signal transmission and a periodicity of the periodic reporting being aligned with each other.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the identification of the at least one collision is based at least in part on a transmission of the periodic reference signal transmission on a particular antenna and a transmission of the periodic reporting on the particular antenna overlapping with each other.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the second antenna order is selected from a plurality of antenna orders based at least in part on the particular antenna.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, at least one of the identification of the at least one collision or the determination of the second antenna order is based at least in part on receiving configuration information relating to the periodic reporting or the periodic reference signal transmission.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the second antenna order is based at least in part on a cross-switch configuration of a radio frequency chain of the UE.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the second antenna order includes one or more occasions in which the periodic reference signal transmission is blanked based at least in part on a duty cycle.

<FIG> is a block diagram of an example apparatus <NUM> for wireless communication, in accordance with the present disclosure. The apparatus <NUM> may be a UE, or a UE may include the apparatus <NUM>. In some aspects, the apparatus <NUM> includes a reception component <NUM> and a transmission component <NUM>, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatus <NUM> may communicate with another apparatus <NUM> (such as a UE, a base station, or another wireless communication device) using the reception component <NUM> and the transmission component <NUM>. As further shown, the apparatus <NUM> may include one or more of an identification component <NUM>, a determination component <NUM>, among other examples.

In some aspects, the apparatus <NUM> may be configured to perform one or more operations described herein in connection with <FIG>. Additionally or alternatively, the apparatus <NUM> may be configured to perform one or more processes described herein, such as process <NUM> of <FIG>. In some aspects, the apparatus <NUM> and/or one or more components shown in <FIG> may include one or more components of the UE described above in connection with <FIG>. Additionally, or alternatively, one or more components shown in <FIG> may be implemented within one or more components described above in connection with <FIG>. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

In some aspects, the transmission component <NUM> may be collocated with the reception component <NUM> in a transceiver.

The identification component <NUM> may identify at least one collision between a periodic reporting of channel state information associated with a first RAT and a periodic reference signal transmission associated with a second RAT, wherein each reference signal transmission of the periodic reference signal transmission is sequentially transmitted via a plurality of antennas based at least in part on a first antenna order. In some aspects, the identification component <NUM> may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with <FIG>. The determination component <NUM> may determine a second antenna order for the periodic reference signal transmission that resolves the at least one collision. In some aspects, the determination component <NUM> may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with <FIG>. The transmission component <NUM> may transmit the periodic reference signal transmission using the second antenna order.

The determination component <NUM> may determine that the at least one collision can be resolved by modifying the first antenna order, wherein the determination of the second antenna order is based at least in part on the determination that the at least one collision can be resolved by modifying the first antenna order.

The determination component <NUM> may determine that blanking of the periodic reporting associated with the first RAT is to be performed if the second antenna order is not used, wherein the determination of the second antenna order is based at least in part on the determination that blanking of the periodic reporting associated with the first RAT is to be performed if the second antenna order is not used. In some aspects, the determination component <NUM> may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with <FIG>.

<FIG> is a diagram illustrating an example <NUM> of a multi-subscriber identity module (SIM) UE, in accordance with the present disclosure. As shown in <FIG>, a UE <NUM> may be a multiple SIM (multi-SIM) UE that includes multiple SIMs (two or more SIMs), shown as a first SIM 805a and a second SIM 805b. The first SIM 805a may be associated with a first subscription (shown as SUB <NUM>, and also referred to as a first subscription), and the second SIM 805b may be associated with a second subscription (shown as SUB <NUM>, and also referred to as a second subscription). A subscription may be a subscription with a network operator (for example, a mobile network operator (MNO)) that enables the UE <NUM> to access a wireless network (for example, a radio access network (RAN)) associated with the network operator.

A SIM <NUM> may be a removable SIM (for example, a SIM card) or an embedded SIM. A SIM <NUM> may include an integrated circuit that securely stores an international mobile subscriber identity (IMSI) and a security key, which are used to identify and authenticate a corresponding subscription associated with the SIM <NUM>. In some cases, a SIM <NUM> may store a list of services that the UE <NUM> has permission to access using a subscription associated with the SIM <NUM>, such as a data service or a voice service, among other examples.

As further shown in <FIG>, the UE <NUM> may communicate (for example, in a connected mode, an idle mode, or an inactive mode) with a first base station 810a via a first cell 815a (shown as Cell <NUM>) using the first SIM 805a. In this case, a first subscription (SUB <NUM>) of the UE <NUM> may be used to access the first cell 815a (for example, using a first IMSI for UE identification, using a first security key for UE authentication, using a first list of services that the UE <NUM> is permitted to access using the first subscription, or by counting data or voice usage on the first cell against the first subscription, among other examples). Similarly, the UE <NUM> may communicate (for example, in a connected mode, an idle mode, or an inactive mode) with a second base station 810b via a second cell 815b (shown as Cell <NUM>) using the second SIM 805b. In this case, a second subscription (SUB <NUM>) of the UE <NUM> may be used to access the second cell 815b (for example, using a second IMSI for UE identification, using a second security key for UE authentication, using a second list of services that the UE <NUM> is permitted to access using the second subscription, or by counting data or voice usage on the second cell against the second subscription, among other examples).

The first base station 810a and/or the second base station 810b may include one or more of the base stations <NUM> described above in connection with <FIG>. Although the first cell 815a and the second cell 815b are shown as being provided by different base stations, in some aspects, the first cell <NUM> and the second cell 815b may be provided by the same base station. Thus, in some aspects, the first base station 810a and the second base station 810b may be integrated into a single base station.

In some cases, the UE <NUM> may be capable of operating in a multi-SIM multiple standby (MSMS) mode, such as a dual SIM dual standby (DSDS) mode (e.g., when the UE <NUM> is associated with two subscriptions). Additionally, or alternatively, the UE <NUM> may be capable of operating in a multi-SIM multiple active (SR-MSMA) mode, such as a dual SIM dual active (DSDA) mode (e.g., when the UE <NUM> is associated with two subscriptions).

In a DSDA mode, the UE <NUM> is capable of concurrent active communication using both SIMs of the UE <NUM>. Thus, a UE <NUM> in the DSDA mode is capable of communicating using the first SIM 305a (and the first subscription) at the same time as communicating using the second SIM 305b (and the second subscription). For example, when the UE <NUM> is in an active session (e.g., a voice call or another latency sensitive service, such as online gaming, stock trading, or an over-the-top (OTT) service) using the first SIM 305a, the UE <NUM> is capable of receiving a notification of a voice call using the second SIM 305b without interrupting communications that use the first SIM 305a, and without tuning or switching away from the first cell 315a to tune to the second cell 315b.

In a DSDS mode, the UE <NUM> is not capable of concurrent active communication using both SIMs of the UE <NUM>. Thus, a UE <NUM> in the DSDS mode is not capable of communicating using the first SIM 305a (and the first subscription) at the same time as communicating using the second SIM 305b (and the second subscription). However, a UE <NUM> in the DSDS mode may be capable of switching between two separate mobile network services, may include hardware for maintaining multiple connections (for example, one connection per SIM) in a standby state, or may include hardware (for example, multiple transceivers) for maintaining multiple network connections at the same time, among other examples. However, a UE <NUM> in the DSDS mode may be capable of receiving data on only one connection at a time because radio frequency resources are shared between the multiple subscriptions. For example, a UE <NUM> in the DSDS mode may be associated with multiple subscriptions but may include only a single transceiver shared by the multiple subscriptions, a single transmit chain shared by the multiple subscriptions, or a single receive chain shared by the multiple subscriptions, among other examples.

In some aspects, a UE <NUM> may be capable of using a dual-receive DSDS (DR-DSDS) mode. In the DR-DSDS mode, the UE <NUM> can receive communications simultaneously for two subscribers. The first subscription may be a designated data subscriber (DDS) and may be in a connected mode. The second subscription may not be a DDS (referred to herein as an nDDS), and may be in an idle mode. The UE <NUM> (e.g., the first subscription) may transmit reference signaling on a first RAT associated with an antenna order (as described in connection with <FIG>). For example, the first subscription may perform 1T4R antenna switching, as described elsewhere herein. The second subscription, which may be in an idle mode, may perform periodic operations such as monitoring paging, measurement, receiving system information, or the like. Situations may arise where, due to RFFE hardware cross-switch sharing, the first subscription's transmission of reference signaling using antenna switching can negatively impact (e.g., collide with) the periodic operations of the second subscription. Techniques described herein provide resolution of such a negative impact, as described in more detail below.

In some examples, a UE <NUM> may be capable of operating in a DSDA mode for a first combination of RATs, and may not be capable of operating in a DSDA mode for a second combination of RATs. For example, the UE <NUM> may be capable of operating in a DSDA mode for NR+NR, where the first cell 315a (as well as the first SIM 305a and the first subscription) uses an NR RAT and the second cell 315b (as well as the second SIM 305b and the second subscription) also uses the NR RAT. However, the UE <NUM> may not be capable of operating in a DSDA mode for NR+LTE, where one of the first cell 315a (as well as the first SIM 305a and the first subscription) uses an NR RAT and the second cell 315b (as well as the second SIM 305b and the second subscription) uses an LTE RAT (or vice versa). In some aspects, the UE <NUM> may not be capable of operating in the DSDA mode for the second combination of RATs (e.g., NR+LTE), but be capable of operating in a DSDS mode for the second combination of RATs. This UE design reduces design costs as compared to enabling the UE <NUM> to operate using the DSDA mode for the second combination of RATs.

<FIG> is a diagram illustrating an example <NUM> of a set of RF chains of a UE, in accordance with the present disclosure. <FIG> shows a transceiver <NUM> (e.g., transceiver <NUM>), a set of cross-switches <NUM>-<NUM> and <NUM>-<NUM> (e.g., cross-switches <NUM>-<NUM> and <NUM>-<NUM>), and a set of antennas <NUM>-<NUM> through <NUM>-<NUM> (e.g., antennas <NUM>-<NUM> through <NUM>-<NUM>).

An antenna <NUM> may be antenna <NUM> and/or the like. An antenna <NUM> can perform reception, transmission, or a combination thereof. For example, a RAT may be associated with one or more receive antennas and one or more transmit antennas. In example <NUM>, there are two RATs: an LTE RAT associated with band B3, and an NR RAT associated with band N41. For example, the UE of example <NUM> may be associated with a multiple subscriber (such as multiple subscriber identity module (SIM) (MSIM)) configuration, where the NR RAT is associated with a first subscription (Sub1) and the LTE RAT is associated with a second subscription (Sub2). Furthermore, a designated data subscriber (DDS) may be associated with the NR RAT, and a non-DDS (nDDS) may be associated with the LTE RAT. As further shown, the NR RAT (e.g., Sub1) is associated with three receive antennas and one transmit/receive antenna, and the LTE RAT (e.g., Sub2) is associated with two receive antennas.

Some transmissions may be performed using an antenna order. An antenna order may define an order in which antennas <NUM> are to be sequentially used to perform a transmission. As an example, an SRS may be transmitted using an antenna order in order to improve transmit diversity. In the course of transmitting the SRS using the antenna order, the UE may switch an antenna used for a current physical uplink shared channel (PUSCH) to a different antenna used for reception in a current operating frequency channel (e.g., associated with an absolute radiofrequency channel number (ARFCN)). The base station may use the SRS for improve downlink precoding, thereby improving downlink MIMO performance. The SRS transmission may be performed periodically (e.g., in accordance with a periodicity).

The UE of example <NUM> may share RFFE resources (e.g., cross-switch <NUM>, antenna <NUM>, and/or the like) between the LTE RAT and the NR RAT. In some circumstances, a communication associated with a first RAT (e.g., the NR RAT) may utilize RFFE resources that would otherwise be used for a concurrent communication associated with a second RAT (e.g., the LTE RAT). This is referred to as a collision of the communication associated with the first RAT and the communication associated with the second RAT. In example <NUM>, the transmission of the SRS on antenna <NUM> may collide with an idle mode reception operation on antenna <NUM>. As another example, the transmission of the SRS on antenna <NUM> may collide with an idle mode reception operation (e.g., the same one as on antenna <NUM> or a different one than on antenna <NUM>) of the second subscription. Furthermore, in some scenarios, an idle mode reception operation (such as paging reception may be periodic and may repeatedly collide with an uplink transmission on the first RAT. For example, if the uplink transmission on the first RAT is an SRS associated with an antenna order, the idle mode reception operation on the second RAT may repeatedly collide with the SRS transmission on one or more antennas based at least in part on the antenna order. Persistent collisions may impact throughput and radio link quality on the second RAT.

In such a scenario, the UE may drop the communication associated with the second RAT (which is referred to herein as blanking a communication associated with the second RAT). However, blanking the communication associated with the second RAT negatively impacts BLER on the connection associated with the second RAT, which could lead to diminished throughput and RLF.

Some techniques and apparatuses described herein provide for an antenna order of a periodic reference signal transmission to be modified based at least in part on identifying one or more collisions between the periodic reference signal transmission and another communication, such as an idle mode reception operation associated with a different subscriber than the periodic reference signal transmission. For example, the UE may identify at least one collision between the periodic reference signal transmission and the other communication and may modify the antenna order of the periodic reference signal transmission based at least in part on the at least one collision. The modified antenna order may be configured such that the at least one collision is eliminated, or so that a frequency of collisions between the periodic reference signal transmission and the other communication is reduced. For example, for an antenna order of [<NUM><NUM><NUM><NUM>] for transmission of an SRS, where a collision occurs on antenna <NUM>, the antenna order may be modified to (for example) [<NUM><NUM><NUM><NUM>], so that the SRS transmission on antenna <NUM> is transmitted at a different time than the colliding collision.

In this way, an impact of collisions between periodic communications, such as collisions between NR SRS transmissions and idle mode reception operations, is reduced. Thus, throughput is improved and impact on the communication link is mitigated.

<FIG> is a diagram illustrating an example <NUM> of identifying and mitigating a collision based at least in part on an antenna order for a reference signal transmission, in accordance with the present disclosure. The operations described with regard to <FIG> may be performed by a UE (e.g., UE <NUM>, the UE of example <NUM>, the UE <NUM> of <FIG>, the UE of <FIG>). For example, as shown by block <NUM>, the UE may be in an MSIM DR-DSDS mode, wherein an idle mode nDDS subscription (referred to as a second SUB) and a connected mode DDS subscription (e.g., using an NR RAT, and referred to as a first SUB) share cross-switches, as described in more detail in connection with <FIG>. As used herein, "idle mode" and "connected mode" may refer to RRC idle mode and RRC connected mode.

As shown by block <NUM>, the UE may determine whether any NR SRS path shares an antenna with a reception of the second SUB (e.g., an idle mode reception). The reception of the second SUB may be referred to herein as an idle mode reception operation, and may include paging monitoring, system information reception, or measurement, among other examples. For example, the UE may perform paging monitoring activities after each idle mode DRX cycle (e.g., if a DRX cycle length is <NUM>, the idle mode nDDS sub may awaken from a sleep state every <NUM> and monitor a paging channel). Paging monitoring may typically be performed in a single slot or a single subframe, though the techniques and apparatuses described herein provide for collision detection using a longer time window, as described below. As another example, the UE may perform idle mode measurement activities, such as measurements of a serving cell (such as for intra-band idle-mode mobility or maintaining frequency and time tracking loops) or measurements of a neighbor cell (such as intra-band or inter-band measurements for mobility). As yet another example, the UE may perform system information monitoring (such as system information block (SIB) <NUM> (SIB-<NUM>) and SIB <NUM> RRC messages for idle mode).

In some aspects, the UE may determine whether any antenna of the UE is shared between an NR connection and an LTE connection. As an example, antenna <NUM>-<NUM> of <FIG> is shared between the reception of the second SUB and the SRS transmission of the first SUB. "NR SRS path" refers to a transmit path used for an NR SRS. For example, an SRS transmitted using an antenna order [<NUM><NUM><NUM><NUM>], as illustrated in <FIG>, may be associated with NR SRS paths on each of antennas <NUM>-<NUM> through <NUM>-<NUM>. In some aspects, the UE may determine whether any NR SRS path collides with an idle-mode receive antenna at every LTE/NR configuration or reconfiguration, or at every LTE/NR antenna switching configuration. Additionally, or alternatively, the UE may determine whether any NR SRS path collides with an idle-mode receive antenna upon idle-mode nDDS SUB (e.g., second SUB) or connected-mode SUB (e.g., DDS SUB) configuration or reconfiguration if the configuration or reconfiguration impacts the second SUB's reception periodicity or the first SUB's SRS periodicity. Furthermore, the UE may determine whether any NR SRS path collides with an idle-mode receive antenna upon receiving a configuration indicating an RF band change. If no NR SRS path shares an antenna with a reception on the second SUB (block <NUM> - No), the UE may return to a start of example <NUM>, at block <NUM>.

If an NR SRS path shares an antenna with a reception on the second SUB (block <NUM> - Yes), the UE may determine whether the reception on the second SUB is associated with a persistent collision with the NR SRS (block <NUM>). For example, the UE may identify one or more collisions between the reception on the second SUB and the NR SRS. In some aspects, the UE may determine whether a receive antenna of the second SUB is associated with a persistent collision with an NR SRS path at every LTE/NR configuration or reconfiguration or LTE/NR antenna switching configuration.

In some aspects, the UE may determine if a periodicity of a reception on the second SUB modulo a periodicity of an NR transmission (e.g., an SRS transmission) is zero with regard to a common time reference. For example, the UE may determine if the periodicity of the periodic reference signal transmission and the periodicity of the reception on the second SUB are aligned with each other. For example, in some examples, the second SUB's periodicity for paging is every <NUM> (e.g., due to an idle-mode paging DRX cycle having a length of <NUM>). If the second SUB's paging periodicity is <NUM> and the first SUB's SRS periodicity is <NUM>, only the SRS transmission(s) on the NR SRS path that is colliding with the second SUB's antenna(s) (where idle-mode reception may use one or two antennas) needs to be suspended. In this example, the periodicity to suspend may correspond to the second SUB's paging periodicity, which in this example is <NUM>. If the second SUB's paging periodicity is shorter than the first SUB's SRS periodicity, then from the second SUB's perspective, the paging and the SRS transmission cannot collide persistently (e.g. if the second SUB's paging periodicity is <NUM> and the SRS periodicity is <NUM>).

In some aspects, the UE may account for pre-subframe or post-subframe procedures associated with the second SUB. For example, the UE, when identifying the at least one collision, may account for the second SUB's duration to receive the reception (e.g., an NR slot or an LTE subframe plus a margin). The margin may account for pre-slot or subframe, and post-slot or subframe) procedures that may need to be protected from interruption due to the transmission of the SRS. In this case, a total duration in which to protect the second SUB's reception may include one or more of an RF tuning duration to activate or tune one or more RF chains or devices before the reception, a paging RF sample capture duration, and an RF tuning duration to deactivate or tune one or more RF chains or devices after the reception. In some aspects, the UE may account for a duration of the SRS transmission on the first SUB. For example, the UE may account for the duration of the SRS transmission in terms of a number of symbols (e.g., <NUM>, <NUM>, or <NUM> symbols) used to transmit the SRS transmission. The determination of whether there is a collision and/or a persistent collision between the SRS transmission of the first SUB and the reception of the second SUB may be based at least in part on the duration of the SRS transmission.

In some aspects, different receptions on the second RAT may have different periodicities. For example, paging may be associated with a different periodicity than measurement. As another example, paging and/or measurement may be associated with a different periodicity than system information monitoring. As yet another example, idle mode paging may be performed every discontinuous reception (DRX) cycle, idle mode measurement may be performed every <NUM> DRX cycles, and idle mode system information monitoring may be performed every <NUM> DRX cycles. In this case, if any of these periodicities has a persistent collision, the UE may identify at least one collision (e.g., may determine that a criterion for identifying a persistent collision associated with the second SUB is satisfied).

In some aspects, the UE may determine whether at least one collision is detected based at least in part on information received from an LTE protocol stack and an NR protocol stack of the UE. For example, the UE may acquire, from the LTE protocol stack and/or the NR protocol stack, information indicating a configuration for an idle mode reception (e.g., paging, measurement, system information monitoring) and an NR transmission (e.g., an SRS configuration). The UE <NUM> may identify the at least one collision using this information.

In some aspects, the UE may determine whether blanking of the reception of the second SUB or the NR SRS transmission of the first SUB is to be performed. For example, in some implementations, a UE may be associated with a sufficient number of antennas to perform both the reception on the second SUB and the SRS transmission on the first SUB (e.g., <NUM> antennas, <NUM> antennas, and/or the like). In such a case, if the UE is associated with a sufficient number of antennas to perform both the reception and the NR SRS transmission, the UE may determine that the reception needs not be blanked and the SRS transmission's antenna order needs not be modified, thereby conserving resources that would otherwise be used to modify the antenna order of the NR SRS transmission or blank at least one of the NR SRS transmission or the reception.

If the reception is not associated with a persistent collision with the NR SRS (block <NUM> - No) then the UE may return to block <NUM>. If the reception is associated with a persistent collision with the NR SRS (block <NUM> - Yes), then the UE may determine whether modifying an antenna order of the NR SRS (e.g., the transmission of the first SUB) resolves the at least one collision. For example, the UE may determine whether swapping an order of the NR SRS transmission on the SRS path resolves the persistent collision with the reception on the second SUB. If modifying the antenna order of the NR SRS does not resolve the at least one collision (block <NUM> - No), then the UE may blank the NR SRS transmission (block <NUM>). For example, the UE may blank the NR SRS transmission on a time occasion in which the NR SRS transmission collides with the reception on the LTE SUB. In some aspects, the UE may blank one or more SRS transmission instances that overlap with any portion of the LTE transmission.

If modifying the antenna order of the NR SRS resolves the at least one collision (block <NUM> - Yes), then the UE may modify the antenna order of the NR SRS (block <NUM>), and may return to block <NUM>. For example, the UE may determine a second antenna order that is different than a first antenna order for the NR SRS transmission. The second antenna order may be configured such that the NR SRS does not collide with the reception. In this way, an impact of periodic SRS transmission on reception of an idle mode SUB is reduced, thereby improving idle mode functionality of the second SUB.

The below pseudocode illustrates an example process relating to example <NUM>. In the below pseudocode, /* and */ delimit code comments. For example, "/* ABC */" is a code comment of "ABC. " Lines of pseudocode are numbered sequentially.

In the above pseudocode, the UE determines a default SRS transmission antenna order of (<NUM>,<NUM>,<NUM>,<NUM>). The UE also generates non-default SRS transmission antenna orders of (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), and (<NUM>,<NUM>,<NUM>,<NUM>). If the UE identifies a colliding antenna, for item-X, is antenna <NUM> (i.e., the last antenna of the default SRS transmission order), then the UE may select, from the non-default SRS transmission antenna orders, a set of antenna orders in which antenna <NUM> is in a different position in the default SRS antenna order. In this example, the UE may select one of (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), (<NUM>,<NUM>,<NUM>,<NUM>), and (<NUM>,<NUM>,<NUM>,<NUM>). For example, the UE <NUM> select an antenna order associated with a lowest number of blanked antennas for the reception of the second SUB. The UE may set the SRS transmission's antenna order to the selected non-default SRS antenna order.

In some aspects, the UE may receive configuration information (e.g., RRC reconfiguration information for the first SUB or the second SUB) that modifies the periodicity of the SRS transmission or the reception. The UE may start from block <NUM> based at least in part on receiving such information. For example, the UE (e.g., a software module of the UE) may be notified if there is an LTE or NR reconfiguration that impacts the second SUB's reception periodicity or the first SUB's SRS periodicity.

<FIG> is a diagram illustrating a process <NUM> performed by a UE, in accordance with the claimed invention. Process <NUM> is an example where the UE (e.g., UE <NUM>, the UE <NUM> of <FIG>, the UE of <FIG>, the UE <NUM> of <FIG>, or the UE of <FIG>) performs operations associated with reordering an antenna order to avoid transmit blanking.

As shown in <FIG>, and according to the claimed invention, process <NUM> includes identifying at least one collision between an idle mode reception associated with a first subscription and a periodic reference signal transmission associated with a second subscription, wherein each reference signal transmission of the periodic reference signal transmission is sequentially transmitted via a plurality of antennas based at least in part on a first antenna order (block <NUM>). For example, the UE (e.g., using communication manager <NUM> and/or identification component <NUM>, depicted in <FIG>) may identify at least one collision between an idle mode reception associated with a first subscription and a periodic reference signal transmission associated with a second subscription, wherein each reference signal transmission of the periodic reference signal transmission is sequentially transmitted via a plurality of antennas based at least in part on a first antenna order, as described above.

As further shown in <FIG>, and according to the claimed invention, process <NUM> includes determining a second antenna order for the periodic reference signal transmission that resolves the at least one collision (block <NUM>). For example, the UE (e.g., using communication manager <NUM> and/or determination component <NUM>, depicted in <FIG>) may determine a second antenna order for the periodic reference signal transmission that resolves the at least one collision, as described above. In some aspects, "resolving the at least one collision" may include partially resolving the at least one collision. For example, the second antenna order may minimize the number of remaining collisions, relative to one or more other potential antenna orders. As another example, the second antenna order may resolve the at least one collision, though other collisions may remain. As used herein, "resolving a collision" refers to eliminating the need to drop one of the periodic reference signal transmission or the reception at a time associated with the at least one collision. In some aspects, the at least one collision is a persistent collision, where a persistent collision is based at least in part on respective periodicities of the periodic reference signal transmission and the reception causing the two communications to overlap on a repeated basis.

As further shown in <FIG>, and according to the claimed invention, process <NUM> includes transmitting the periodic reference signal transmission using the second antenna order (block <NUM>). For example, the UE (e.g., using communication manager <NUM> and/or transmission component <NUM>, depicted in <FIG>) may transmit the periodic reference signal transmission using the second antenna order, as described above.

In a second aspect, alone or in combination with the first aspect, the idle mode reception is associated with at least one of paging, measurement, or system information monitoring, and wherein the periodic reference signal transmission is associated with a sounding reference signal.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, process <NUM> includes determining that blanking of the idle mode reception is to be performed if the second antenna order is not used, wherein the determination of the second antenna order is based at least in part on the determination that blanking of the idle mode reception is to be performed if the second antenna order is not used.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the identification of the at least one collision is based at least in part on a periodicity of the idle mode reception and a periodicity of the periodic reporting being aligned with each other.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the identification of the at least one collision is based at least in part on a transmission of the periodic reference signal transmission on a particular antenna and the idle mode reception on the particular antenna overlapping with each other.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, at least one of the identification of the at least one collision or the determination of the second antenna order is based at least in part on receiving configuration information relating to the idle mode reception or the periodic reference signal transmission.

Claim 1:
A method of wireless communication performed by a user equipment, UE, comprising:
identifying (<NUM>) at least one collision between a periodic reporting of channel state information associated with a first radio access technology, RAT, and a periodic reference signal transmission associated with a second RAT, wherein each reference signal transmission of the periodic reference signal transmission is sequentially transmitted via a plurality of antennas based at least in part on a first antenna order; and
determining (<NUM>) a second antenna order for the periodic reference signal transmission that resolves the at least one collision; and
transmitting (<NUM>) the periodic reference signal transmission using the second antenna order.