Patent Description:
The present disclosure relates generally to communication systems, and more particularly, to transmission configuration indication (TCI) state / beam determination for new radio (NR) Dual Active Protocol Stack (DAPS) handover (HO).

Due to the increasing demand for wireless communications, there is a desire to improve the efficiency of wireless communication network techniques. Relatedly, document <CIT> describes handover of a terminal using multi-connection in a cellular communication system. A terminal receives a beam of a BS at an area where beams of the first and a second BS overlap, and, if it determines that data transmission/ reception with said second BS is possible, it sends a RACH and sets a connection to the second BS while maintaining the connection to the first BS. When moving toward the second BS, the terminal may release the connection to the first BS and maintain only the connection to the second BS.

Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later, the scope of the disclosure being defined by the appended claims.

An example implementation includes a method of wireless communication, including connecting, by a user equipment (UE), to a source cell via a first beam. The method further includes connecting, by the UE, to a target cell via a second beam during a handover from the source cell to the target cell. The method may further include determining, by the UE, whether a first transmission using the first beam overlaps in time with a second transmission using the second beam. The method may further include performing, by the UE, beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam.

Another example implementation includes an apparatus for wireless communication, including a processor and a memory in communication with the processor. The memory storing instructions which, when executed by the processor, cause the processor to connect, by a user equipment (UE), to a source cell via a first beam. The instructions when executed by the processor further cause the processor to connect, by the UE, to a target cell via a second beam during a handover from the source cell to the target cell. Additionally, the instructions when executed by the processor further cause the processor to determine, by the UE, whether a first transmission using the first beam overlaps in time with a second transmission using the second beam. Additionally, the instructions when executed by the processor cause the processor to perform, by the UE, beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam.

Another example implementation includes an apparatus for wireless communication, including means for connecting, by a user equipment (UE), to a source cell via a first beam. The apparatus further includes means for connecting, by the UE, to a target cell via a second beam during a handover from the source cell to the target cell. Additionally, the apparatus includes means for determining, by the UE, whether a first transmission using the first beam overlaps in time with a second transmission using the second beam. Additionally, the apparatus includes means for performing, by the UE, beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam.

Another example implementation includes a non-statutory computer-readable medium storing instructions for wireless communication, executable by a processor to connect, by a user equipment (UE), to a source cell via a first beam. The instructions are further executable to connect, by the UE, to a target cell via a second beam during a handover from the source cell to the target cell. Additionally, the instructions are executable to determine, by the UE, whether a first transmission using the first beam overlaps in time with a second transmission using the second beam. Additionally, the instructions are executable to perform, by the UE, beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam.

One or more of the above examples may further include performing beam selection which comprises performing beam selection between the first beam and the second beam based on one or more parameters in response to the determination that the first transmission using the first beam and the second transmission using the second beam overlap.

One or more of the above examples may further include that the one or more parameters include at least one of a type of cell, a type of channel, and a quality of service (QoS).

One or more of the above examples may further include performing beam selection between the first beam and the second beam based at least in part on the one or more parameters in response to the determination that the first transmission using the first beam and the second transmission using the second beam overlap further comprises: establishing, by the UE, a time period for prioritizing the target cell over the source cell; performing, by the UE, beam selection with the target cell over the source cell for the time period; determining, by the UE, whether a prioritization timer corresponding to the time period has expired; and performing, by the UE, beam selection to switch from the target cell to the source cell based on the determination that the prioritization timer has expired.

One or more of the above examples may further include maintaining, by the UE, the beam selection with the target cell over the source cell based on the determination that the prioritization timer has not expired.

One or more of the above examples may further include performing beam selection between the first beam and the second beam based at least in part on the one or more parameters in response to the determination that the first transmission using the first beam overlaps the second transmission using the second beam further comprises: determining, by the UE, that a first Physical Downlink Control Channel (PDCCH) beam corresponding to one of the source cell or the target cell is received without interruption; performing, by the UE, beam selection for a reception of a Physical Downlink Shared Channel (PDSCH) beam associated with the PDCCH beam over a reception of a second PDCCH corresponding to the other one of the source cell or the target cell.

One or more of the above examples may further include performing beam selection for the reception of the PDSCH beam associated with the PDCCH beam over the reception of the second PDCCH corresponding to the other one of the source cell or the target cell further comprises performing beam selection for the reception of the PDSCH beam associated with the PDCCH beam over the reception of the second PDCCH corresponding to the other one of the source cell or the target cell based on a determination that a prioritization timer has not expired.

One or more of the above examples may further include performing beam selection between the first beam and the second beam based on the one or more parameters in response to the determination that the first transmission using the first beam overlaps the second transmission using the second beam further comprises: determining, by the UE, that the first beam and the second beam correspond to overlapping PDSCHs; determining, by the UE, a priority level of a first application associated with the first beam and a priority level of a second application associated with the second beam; performing, by the UE, beam selection with the target cell over the source cell based on the determination that the priority level of the first application associated with the first beam is prioritized than the priority level of the second application associated with the second beam; and performing, by the UE, beam selection with the source cell over the target cell based on the determination that the priority level of the first application associated with the first beam is higher than the priority level of the second application associated with the second beam.

One or more of the above examples may further include performing beam selection with the target cell over the source cell based on the determination that the priority level of the first application associated with the first beam is prioritized than the priority level of the second application associated with the second beam further comprises performing beam selection with the target cell over the source cell based on a determination that a prioritization timer has not expired.

One or more of the above examples may further include performing beam selection further comprises performing beam selection between the first beam and the second beam based at least in part on the determination that the first transmission using the first beam does not overlap with the second transmission using the second beam.

One or more of the above examples may further include performing beam selection between the first beam and the second beam based at least in part on the determination that the first transmission using the first beam does not overlap the second transmission using the second beam further comprises determining, by the UE, that a distance in time between physical channels of the source cell and the target cell fails to satisfy a beam switching threshold.

One or more of the above examples may further include identifying, by the UE, an earliest received physical channel from either the source cell or the target cell; and performing, by the UE, beam selection with either the source cell or the target cell associated with the earliest received physical channel.

One or more of the above examples may further include determining, by the UE, that a first Physical Downlink Control Channel (PDCCH), associated with the target cell having priority over the source cell, is received before a second PDCCH associated with the source cell; and performing, by the UE, beam selection for a Physical Downlink Shared Channel (PDSCH) associated with the target cell.

One or more of the above examples may further include performing beam selection between the first beam and the second beam in response to a determination that the first transmission using the first beam does not overlap with the second transmission using the second beam further comprises: determining, by the UE, that a distance in time between reception of a Physical Downlink Control Channel (PDCCH) associated with the source cell and a Physical Downlink Shared Channel (PDSCH) associated with the target fails to satisfy a beam switching threshold, wherein the target cell has priority over the source cell; utilizing, by the UE, a beam for a PDCCH associated with the target cell and a determined beam for the PDSCH associated with the target cell.

One or more of the above examples may further include determining whether the first transmission using the first beam overlaps in time with the second transmission using the second beam includes determining whether a physical downlink shared channel (PDSCH) with a TCI state explicitly indicated in a downlink control information (DCI) or indicated by a transmission configuration indication (TCI) state of a scheduling PDCCH overlaps with a PDSCH with a TCI state derived from a monitored search space with the lowest CORESET-ID in a latest slot, and wherein performing beam selection between the first beam and the second beam is based at least in part on a determination that the PDSCH with the TCI state explicitly indicated in the DCI or indicated by the TCI state of the scheduling PDCCH overlaps with the PDSCH with the TCI state derived from the monitored search space with the lowest CORESET-ID in the latest slot.

One or more of the above examples may further include performing the beam selection between the PDSCH with the TCI state explicitly indicated in the DCI or indicated by the TCI of the scheduling PDCCH and the PDSCH with the TCI state derived from the monitored search space with the lowest CORESET-ID in the latest slot is based on a reliability of the TCI states of the PDSCHs.

One or more of the above examples may further include performing the beam selection between the PDSCH with the TCI state explicitly indicated in the DCI or indicated by the TCI of the scheduling PDCCH and the PDSCH with the TCI state derived from the monitored search space with the lowest CORESET-ID in the latest slot includes selecting the PDSCH with TCI state explicitly indicated in the DCI or indicated by the TCI of the scheduling PDCCH.

One or more of the above examples may further include performing the beam selection between the PDSCH with the TCI state explicitly indicated in the DCI or indicated by the TCI of the scheduling PDCCH and the PDSCH with a TCI state derived from the monitored search space with the lowest CORESET-ID in the latest slot is further based on at least one of: a priority level of the source cell or the target cell, or a network configuration.

Software may be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

The described aspects relate to apparatus and methods for beam determination for NR Dual Active Protocol Stack (DAPS) handover (HO) in wireless communication systems. For example, in an aspect, during the DAPS HO, the UE is expected to maintain connectivity with the source cell and target cell. This simultaneous connectivity may require that certain beams/panels of the UE to be used for transmission and reception from the source cell and the target cell. As such, the present disclosure provides techniques for the UE to determine the beams for a variety of overlapping and non-overlapping scenarios.

<FIG> is a diagram illustrating an example of a wireless communications system and an access network <NUM> configured for beam determination for NR DAPS HO.

In certain aspects, the UE <NUM> may be configured to operate communication component <NUM> and/or configuration component <NUM> to connect to a source cell via a first beam, connect to a target cell via a second beam during a handover from the source cell to the target cell, determine whether a first transmission using the first beam overlaps in time with a second transmission using the second beam, and performing beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam.

Correspondingly, in certain aspects, the network entity <NUM> (e.g., base station) may be configured to operate communication component <NUM> and/or configuration component <NUM> to transmit one or more beams to UE <NUM>.

The base stations <NUM> configured for <NUM> LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC <NUM> through backhaul links <NUM> (e.g., S1 interface). The base stations <NUM> configured for <NUM> NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network <NUM> through backhaul links <NUM>. The base stations <NUM> may communicate directly or indirectly (e.g., through the EPC <NUM> or core network <NUM>) with each other over backhaul links <NUM> (e.g., X2 interface).

A BS <NUM>, whether a small cell <NUM>' or a large cell (e.g., macro base station), may include an eNB, gNodeB (gNB), or other type of base station. Some base stations, such as gNB <NUM> may operate in one or more frequency bands within the electromagnetic spectrum. The electromagnetic spectrum is often subdivided, based on frequency/wavelength, into various classes, bands, channels, etc. In <NUM> NR two initial operating bands have been identified as frequency range designations FR1 (<NUM> - <NUM>) and FR2 (<NUM> - <NUM>). Although a portion of FR1 is greater than <NUM>, FR1 is often referred to (interchangeably) as a "Sub-<NUM>" band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a "millimeter wave" (mmW) band in documents and articles, despite being different from the extremely high frequency (EHF) band (<NUM> - <NUM>) which is identified by the International Telecommunications Union (ITU) as a "millimeter wave" band.

Communications using the mmW radio frequency band have extremely high path loss and a short range. The mmW base station <NUM> may utilize beamforming <NUM> with the UE <NUM> to compensate for the path loss and short range.

The IP Services <NUM> may include the Intemet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services.

<FIG> include diagrams of example frame structures and resources that may be utilized in communications between the base stations <NUM>, the UEs <NUM>, and/or the secondary UEs (or sidelink UEs) <NUM> described in this disclosure.

<FIG> is a block diagram of a base station <NUM> in communication with a UE <NUM> in an access network, where the base station <NUM> may be an example implementation of base station <NUM> and where UE <NUM> may be an example implementation of UE <NUM>.

At least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM> may be configured to perform aspects in connection with communication component <NUM> of <FIG>.

Referring to <FIG>, the described features generally relate to beam determination for NR DAPS HO. For example, in Release <NUM>, a defined major goal for mobility enhancement is to accomplish zero (<NUM>) milliseconds (ms) interruption time during HO. During the DAPS HO, the UE is expected to maintain connectivity with the source cell and the target cell. This simultaneous connectivity may require that certain beams/panels are used for transmission and reception from the source cell and the target cell.

Since the UE may simultaneously be connected to two cells, and is communicating via time-division-multiplexing (TDM), the UE needs to determine how to select which beam to use for the reception of PDSCH. As such, the present disclosure provides techniques for the UE to determine the beams for a variety of overlapping and non-overlapping scenarios.

For example, in an aspect, the present disclosure includes a method, apparatus, and non-statutory computer readable medium for wireless communications for connecting, by a user equipment (UE), to a source cell via a first beam. The aspect further includes connecting, by the UE, to a target cell via a second beam during a handover from the source cell to the target cell. Additionally, the aspect further includes determining, by the UE, whether a first transmission using the first beam overlaps in time with a second transmission using the second beam. Additionally, the aspect further includes performing, by the UE, beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam.

<FIG> is a diagram <NUM> illustrating an example of call flow for DAPS HO intra-gNB dual Tx/Rx between a UE and at least a source cell (e.g., source gNB) and target cell (e.g., target gNB). For example, the UE may be similar to or the same as UE <NUM> of <FIG>, and the gNBs may be similar to or the same as base stations <NUM>.

In an aspect, at step <NUM>, an event trigger may occur at the UE causing the UE to communicate a measurement report with the gNB-CU. For example, the measurement report may indicate to the gNB-CU that the UE initiated a DAPS HO. Accordingly, gNB-CU may make a DAPS HO decision in response to receiving the measurement report.

In an aspect, at step <NUM>, gNB-CU and target gNB-DU may generate a UE context setup request/response. At step <NUM>, the gNB-CU may transmit an RRC Reconfiguration to the UE. For example, the RRC Reconfiguration message may include CellGroupConfig (Reconfigwithsync) information along with an indication for the UE to initiate an DAPS HO procedure. Upon reception of the RRC Reconfiguration message, UE may maintain connections with both the source cell and target cell until the handover is complete.

In an aspect, at step 4a, the UE may continue data transmission and reception on the source gNB-DU. At step 4b, the UE may connect to target gNB-DU including synchronization and RACH on the target cell. Upon connection with the target gNB-DU, at step <NUM>, the UE may transmit an RRC Connection Reconfiguration Complete message to the gNB-CU. Upon reception of the RRC Connection Reconfiguration Complete message, the gNB-CU may determine a release decision.

In an aspect, at step <NUM>, source gNB-DU, target gNB-DU, and gNB-CU may determine a UE Context Modification Request/Response with the source gNB-DU. At step <NUM>, the gNB-CU may transmit RRC Reconfiguration message that releases the source gNB-DU cell group. Upon reception of the RRC Reconfiguration message, the UE may release connection to the source gNB.

In an aspect, at step <NUM>, the UE may transmit a RRC Reconfiguration Complete message to gNB-CU. At step <NUM>, gNB-CU and target gNB-DU determine a UE Context Release with the source gNB-DU.

<FIG> is a diagram <NUM> illustrating an example of an overlapping scenario and a non-overlapping scenario for beam detection during DAPS HO. For example, the UE may be similar to or the same as UE <NUM> of <FIG>, and the source cell and target cell may be similar to or the same as base stations <NUM>.

In an aspect, overlapping scenario <NUM> illustrates a scenario in which the PDSCH/PDCCH <NUM> for cell <NUM> (e.g., a target cell) overlaps (wherein at least a portion of the beam may overlap in time with another beam) PDSCH/PDCCH <NUM> for cell <NUM> (e.g., a source cell). For example, the beams for each cell may be selected as described herein. In this example, beams used for the transmission of the PDCCH and/or the PDSCH may be derived from measurement made from SS-block/CSI-RS.

For PDCCH, the MAC indicated TCI state for a CORESET associated with the PDCCH indicates the associated spatial filter (hence, beam) used for PDCCH transmission. Accordingly, CORESET <NUM> typically follows the beam identified during the initial access procedure.

For PDSCH, one of a number of schemes may be used depending on the configured CORESET(s) and/or whether or not a non fallback DCI includes a configured transmission configuration indication (TCI).

For example, referring to <FIG>, a conceptual diagram of a number of beam determination schemes <NUM> includes a first scheme <NUM> associated with a single CORESET, and a second scheme <NUM> and a third scheme <NUM> each associated with whether or not a non fallback DCI exists. Specifically, in the first scheme <NUM>, , which may correspond to when only one CORESET is configured, e.g., scheduling PDCCH configured with only CORESET <NUM>, the PDSCH transmission configuration indication (TCI) may follow CORESET <NUM>. For example, for all K0s, PDSCH TCI may follow TCI state of CORESET <NUM>, which may correspond to the scenario for when more than one CORESET is configured. In the second scheme <NUM>, for CORESET i with non-fallback DCI and with a configured TCI, scheduling PDCCH may be configured with CORESET i, where i is greater than <NUM>. In one aspect, when K0 is greater than a threshold, PDSCH TCI may follow the TCI indicated by a non-fallback DCI. However, if K0 is less than or equal to the threshold, PDSCH TCI may follow a TCI state of a lowest CORESET identifier of a search space in a latest monitored slot by the UE. In an implementation of the second scheme <NUM>, when PDCCH used for the scheduling carries a non fall back DCI, the associated TCI states for the PDSCH may be indicated by a <NUM>-bit indicator. In the third scheme <NUM>, for CORESET i with non-fallback DCI and with no configured TCI, e.g., if the PDSCH TCI is not indicated in the PDCCH (in other words, no non fall back DCI), when K0 is greater than a threshold, PDSCH TCI may follow the TCI of a scheduling PDCCH with non-fallback DCI with no configured TCI. However, if K0 is less than or equal to the threshold, PDSCH TCI may follow a TCI state of a lowest CORESET identifier of a search space in a latest monitored slot by the UE.

As shown in <FIG>, the TCI states of the PDSCH is either indicated in the DCI of the scheduling PDCCH, follows the TCI state of the scheduling PDCCH or the TCI state of the of the monitored search space with the lowest CORESET-ID in the latest slot. When the PDSCH TCI state is derived from the monitored search space with the lowest CORESET-ID in the latest slot, the state is called the Default PDSCH TCI state.

In an aspect, for overlapping scenario <NUM>, selection between beams associated with both cells may be determined based on priority. For example, if the priority is based on a cell, the target cell contents may be prioritized over the source cell. In this example, the priority may be established for a certain period of time and based on a timer expiry the priority may be switched to another cell. For example, if the priority is based on a channel, and if PDCCH has already been received by the UE without interruption, the priority may be set to the beam to receive the PDSCH while dropping the PDCCH from the other cell. For example, if the priority is based on quality of service (QoS), and assuming that the overlap channels are both PDSCHs but associated with different applications (e.g., EMBB and URLLC), the QoS of the applications may be determined and a higher priority may be given to applications with higher QoS, e.g. URLLC.

Referring back to <FIG>, in an aspect, for the non-overlapping scenario <NUM>, if the distance (represented by arrows) between the physical channels from both cells is large enough for beam switching (i.e., a configured threshold), then the beam selection will be performed as described above. However, in an example where the distance between the physical channels from both cells is not large enough for beam switching, the UE may make certain determinations. For example, the earliest physical channel may be received and the UE may start on this beam to receive the second physical channel. In another example, due to earlier received PDCCH on a priority cell, the UE may choose to use the beam for the PDSCH of the priority cell because the UE has already knows the PDSCH from the source cell but no the PDSCH from the target cell.

<FIG> is a diagram <NUM> illustrating another example of a non-overlapping scenario for beam detection during DAPS HO between a UE and a source cell and a target cell. For example, the UE may be similar to or the same as UE <NUM> of <FIG>, and the source cell and the target cell may be similar to or the same as base stations <NUM>.

In an aspect, in non-overlapping scenario <NUM>, the distance D, which may be defined by a time duration or an amount of time, between the PDCCH <NUM> of cell <NUM> and PDSCH <NUM> of cell <NUM> is not large enough for beam switching to occur. In this example, cell <NUM> is the priority cell (e.g., the target cell). Accordingly, the UE may determine to use the beam for PDCCH <NUM> of cell <NUM> and the determined beam for PDSCH <NUM> for cell <NUM>.

<FIG> is a conceptual diagram <NUM> of overlapping PDSCHs with different TCI states. Specifically, when a default PDSCH TCI state overlaps with a PDSCH with a TCI state derived from the DCI, as indicated by <NUM>, the UE may perform at least one of two actions. In one example, the UE may select the TCI state <NUM> of the target cell <NUM>, since the target cell <NUM> is a priority during DAPS handover. In another example, the UE may select a TCI state <NUM> from the DCI of a PDCCH of the source cell <NUM>, as this may be a more reliable TCI state.

In some aspects, the PDSCH with an reliable TCI state may be explicitly indicated in the DCI or indicated by the TCI of the scheduling PDCCH. In some aspects, the PDSCH with an unreliable state may indicate that the PDSCH TCI state may be derived from the monitored search space with the lowest CORESET identifier (CORESET-ID) in the latest slot. Further, the selection may be based on at least one of a reliability corresponding to the PDSCH with explicitly signaling TCI states, a type of cell (e.g., which implies given priority to a type - source or target cell), or a network configuration (e.g., network can send a UE a pattern of which TCI to select).

<FIG> is a flowchart <NUM> of a method of wireless communication. The method may be performed by a UE (e.g., the UE <NUM>; the apparatus <NUM>; the controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM> and which may be the entire UE <NUM> or a component of the UE <NUM>, such as the TX processor <NUM>, the RX processor <NUM>, and/or the transceiver <NUM>).

At <NUM>, method <NUM> includes connecting, by a user equipment (UE), to a source cell via a first beam. In an aspect, the UE <NUM> and/or the communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, TX processor <NUM>, and transceiver <NUM> may connect to a source cell via a first beam. As such, the UE <NUM> and/or the communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, TX processor <NUM>, and transceiver <NUM> may define a means for connecting, by a user equipment (UE), to a source cell via a first beam.

At <NUM>, method <NUM> includes connecting, by the UE, to a target cell via a second beam during a handover from the source cell to the target cell. In an aspect, the UE <NUM> and/or the communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, RX processor <NUM>, and transceiver <NUM> may connect to a target cell via a second beam during a handover from the source cell to the target cell. As such, communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, RX processor <NUM>, and transceiver <NUM> may define a means for connecting, by the UE, to a target cell via a second beam during a handover from the source cell to the target cell.

At <NUM>, method <NUM> includes determining, by the UE, whether a first transmission using the first beam overlaps in time with a second transmission using the second beam. In an aspect, the UE <NUM> and/or the communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, RX processor <NUM>, and transceiver <NUM> may determine whether a first transmission using the first beam overlaps in time with a second transmission using the second beam. As such, communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, RX processor <NUM>, and transceiver <NUM> may define a means for determining, by the UE, whether a first transmission using the first beam overlaps in time with a second transmission using the second beam.

At <NUM>, method <NUM> includes performing, by the UE, beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam. In an aspect, the UE <NUM> and/or the communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, RX processor <NUM>, and transceiver <NUM> may perform beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam. As such, communication component <NUM>/configuration component <NUM>, e.g., in conjunction with controller/processor <NUM>, which may include the memory <NUM>, processor(s) <NUM>, which may include the memory <NUM>, modem <NUM>, RX processor <NUM>, and transceiver <NUM> may define a means for performing, by the UE, beam selection between the first beam and the second beam based at least in part on the determination of whether the first transmission using the first beam overlaps with the second transmission using the second beam.

In an example of method <NUM>, performing beam selection further comprises performing beam selection between the first beam and the second beam based on one or more parameters in response to the determination that the first transmission using the first beam and the second transmission using the second beam overlap.

In an example, method <NUM> includes the one or more parameters includes at least one of a type of cell, a type of channel, and a quality of service (QoS).

In an example of method <NUM>, performing beam selection between the first beam and the second beam is based at least in part on the one or more parameters in response to the determination that the first transmission using the first beam and the second transmission using the second beam overlap. The beam selection may further comprises: establishing, by the UE, a time period for prioritizing the target cell over the source cell; performing, by the UE, beam selection with the target cell over the source cell for the time period; determining, by the UE, whether a prioritization timer corresponding to the time period has expired; and performing, by the UE, beam selection to switch from the target cell to the source cell based on the determination that the prioritization timer has expired.

In an example, method <NUM> includes maintaining, by the UE, the beam selection with the target cell over the source cell based on the determination that the prioritization timer has not expired.

In an example of method <NUM>, performing beam selection between the first beam and the second beam based at least in part on the one or more parameters in response to the determination that the first transmission using the first beam overlaps the second transmission using the second beam further comprises: determining, by the UE, that a first Physical Downlink Control Channel (PDCCH) beam corresponding to one of the source cell or the target cell is received without interruption; performing, by the UE, beam selection for a reception of a Physical Downlink Shared Channel (PDSCH) beam associated with the PDCCH beam over a reception of a second PDCCH corresponding to the other one of the source cell or the target cell.

In an example of method <NUM>, performing beam selection for the reception of the PDSCH beam associated with the PDCCH beam over the reception of the second PDCCH corresponding to the other one of the source cell or the target cell further comprises performing beam selection for the reception of the PDSCH beam associated with the PDCCH beam over the reception of the second PDCCH corresponding to the other one of the source cell or the target cell based on a determination that a prioritization timer has not expired.

In an example of method <NUM>, performing beam selection between the first beam and the second beam based on the one or more parameters in response to the determination that the first transmission using the first beam overlaps the second transmission using the second beam further comprises: determining, by the UE, that the first beam and the second beam correspond to overlapping PDSCHs; determining, by the UE, a priority level of a first application associated with the first beam and a priority level of a second application associated with the second beam; performing, by the UE, beam selection with the target cell over the source cell based on the determination that the priority level of the first application associated with the first beam is prioritized than the priority level of the second application associated with the second beam; and performing, by the UE, beam selection with the source cell over the target cell based on the determination that the priority level of the first application associated with the first beam is higher than the priority level of the second application associated with the second beam.

In an example of method <NUM>, performing beam selection with the target cell over the source cell based on the determination that the priority level of the first application associated with the first beam is prioritized than the priority level of the second application associated with the second beam further comprises performing beam selection with the target cell over the source cell based on a determination that a prioritization timer has not expired.

In an example of method <NUM>, performing beam selection further comprises performing beam selection between the first beam and the second beam based at least in part on the determination that the first transmission using the first beam does not overlap with the second transmission using the second beam.

In an example of method <NUM>, performing beam selection between the first beam and the second beam based at least in part on the determination that the first transmission using the first beam does not overlap the second transmission using the second beam further comprises determining, by the UE, that a distance in time between one or more of the physical channels of the source cell and the target cell fails to satisfy a beam switching threshold.

In an example, method <NUM> includes identifying, by the UE, an earliest received physical channel from either the source cell or the target cell; and performing, by the UE, beam selection with either the source cell or the target cell associated with the earliest received physical channel.

In an example, method <NUM> includes determining, by the UE, that a first PDCCH, associated with the target cell having priority over the source cell, is received before a second PDCCH associated with the source cell; and performing, by the UE, beam selection for a PDSCH associated with the target cell.

In an example of method <NUM>, performing beam selection between the first beam and the second beam in response to a determination that the first transmission using the first beam does not overlap with the second transmission using the second beam further comprises: determining, by the UE, that a distance in time between reception of a PDCCH associated with the source cell and a PDSCH associated with the target fails to satisfy a beam switching threshold, wherein the target cell has priority over the source cell; utilizing, by the UE, a beam for a PDCCH associated with the target cell and a determined beam for the PDSCH associated with the target cell.

Referring to <FIG>, one example of an implementation of UE <NUM> may include a variety of components, some of which have already been described above and are described further herein, including components such as one or more processors <NUM> and memory <NUM> and transceiver <NUM> in communication via one or more buses <NUM>, which may operate in conjunction with modem <NUM> and/or CC/BWP group communication component <NUM> for beam determination for NR Dual Active Protocol Stack (DAPS) handover (HO).

In an aspect, the one or more processors <NUM> can include a modem <NUM> and/or can be part of the modem <NUM> that uses one or more modem processors. Thus, the various functions related to communication component <NUM> may be included in modem <NUM> and/or processors <NUM> and, in an aspect, can be executed by a single processor, while in other aspects, different ones of the functions may be executed by a combination of two or more different processors. For example, in an aspect, the one or more processors <NUM> may include any one or any combination of a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with transceiver <NUM>. In other aspects, some of the features of the one or more processors <NUM> and/or modem <NUM> associated with communication component <NUM> may be performed by transceiver <NUM>.

Also, memory <NUM> may be configured to store data used herein and/or local versions of applications <NUM> or communicating component <NUM> and/or one or more of its subcomponents being executed by at least one processor <NUM>. Memory <NUM> can include any type of computer-readable medium usable by a computer or at least one processor <NUM>, such as random access memory (RAM), read only memory (ROM), tapes, magnetic discs, optical discs, volatile memory, non-volatile memory, and any combination thereof. In an aspect, for example, memory <NUM> may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining communication component <NUM> and/or one or more of its subcomponents, and/or data associated therewith, when UE <NUM> is operating at least one processor <NUM> to execute communication component <NUM> and/or one or more of its subcomponents.

In an aspect, communicating component <NUM> can optionally include mode determining component <NUM>. For example, upon receiving an anchor signal in an initial bandwidth portion from a network entity <NUM>, the anchor signal triggering an initial access procedure for the UE <NUM>, mode determining component <NUM> may determine whether to operate in a wideband OFDM mode or a wideband SC-FDM mode in response to receiving the anchor signal. Communicating component <NUM> may then transmit a capability report message to the network entity <NUM> based on the determination by the mode determining component <NUM> of whether to operate in the wideband OFDM mode or the wideband SC-FDM mode.

Referring to <FIG>, one example of an implementation of base station <NUM> (e.g., a base station <NUM>, as described above) may include a variety of components, some of which have already been described above, but including components such as one or more processors <NUM> and memory <NUM> and transceiver <NUM> in communication via one or more buses <NUM>, which may operate in conjunction with modem <NUM> and communication component <NUM> for communicating reference signals.

Claim 1:
A method of wireless communication at a user equipment, UE (<NUM>), the method comprising:
connecting (<NUM>) to a source cell (<NUM>) via a first beam;
connecting (<NUM>) to a target cell (<NUM>) via a second beam during a Dual Active Protocol Stack handover from the source cell (<NUM>) to the target cell (<NUM>);
determining (<NUM>) that a first transmission using the first beam overlaps (<NUM>) in time with a second transmission using the second beam; and, in response to determining that the first transmission using the first beam and the second transmission using the second beam overlap (<NUM>) in time, performing (<NUM>) beam selection between the first beam and the second beam, wherein the performing (<NUM>) beam selection further comprises:
establishing a time period for prioritizing the target cell (<NUM>) over the source cell (<NUM>);
performing beam selection with the target cell (<NUM>) over the source cell (<NUM>) for the time period;
determining whether a prioritization timer corresponding to the time period has expired; and
performing beam selection to switch from the target cell (<NUM>) to the source cell (<NUM>) based on the determination that the prioritization timer has expired.