Collision handling for semi-persistent scheduling signals

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may identify a collision between a first resource for a downlink semi-persistent scheduled communication and a second resource for another downlink signal; and perform an action to mitigate the collision based at least in part on identifying the collision. In some aspects, a user equipment (UE) may identify a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal; and determine an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision; and selectively receive the downlink SPS communication or the other downlink signal based at least in part on the determination. Numerous other aspects are provided.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication, and more particularly to techniques and apparatuses for collision handling for semi-persistent scheduling (SPS) signals.

BACKGROUND

SUMMARY

In some aspects, a method of wireless communication, performed by a user equipment (UE), may include identifying a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal; determining an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision; and selectively receiving the downlink SPS communication or the other downlink signal based at least in part on the determination.

In some aspects, a UE for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify a collision between a first resource for a downlink SPS communication and a second resource for another downlink signal; determine an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision; and selectively receive the downlink SPS communication or the other downlink signal based at least in part on the determination.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to identify a collision between a first resource for a downlink SPS communication and a second resource for another downlink signal; determine an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision; and selectively receive the downlink SPS communication or the other downlink signal based at least in part on the determination.

In some aspects, an apparatus for wireless communication may include means for identifying a collision between a first resource for a downlink SPS communication and a second resource for another downlink signal; means for determining an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision; and means for selectively receiving the downlink SPS communication or the other downlink signal based at least in part on the determination.

In some aspects, a method of wireless communication, performed by a base station, may include identifying a collision between a first resource for a downlink semi-persistent scheduled (SPS) communication and a second resource for another downlink signal; and performing an action to mitigate the collision based at least in part on identifying the collision.

In some aspects, a base station for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify a collision between a first resource for a downlink semi-persistent scheduled (SPS) communication and a second resource for another downlink signal; and perform an action to mitigate the collision based at least in part on identifying the collision.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to identify a collision between a first resource for a downlink semi-persistent scheduled (SPS) communication and a second resource for another downlink signal; and perform an action to mitigate the collision based at least in part on identifying the collision.

In some aspects, an apparatus for wireless communication may include means for identifying a collision between a first resource for a downlink semi-persistent scheduled (SPS) communication and a second resource for another downlink signal; and means for performing an action to mitigate the collision based at least in part on identifying the collision.

DETAILED DESCRIPTION

As indicated above,FIG. 1is provided merely as an example. Other examples may differ from what is described with regard toFIG. 1.

Controller/processor240of base station110, controller/processor280of UE120, and/or any other component(s) ofFIG. 2may perform one or more techniques associated with collision handling for SPS signals, as described in more detail elsewhere herein. For example, controller/processor240of base station110, controller/processor280of UE120, and/or any other component(s) ofFIG. 2may perform or direct operations of, for example, process600ofFIG. 6and/or other processes as described herein. Memories242and282may store data and program codes for base station110and UE120, respectively. A scheduler246may schedule UEs for data transmission on the downlink and/or uplink.

In some aspects, a UE (e.g., UE120) may include means for identifying a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal; means for determining an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision; means for selectively receiving the downlink SPS communication or the other downlink signal based at least in part on the determination; means for transmitting a negative acknowledgment for the downlink SPS communication; means for identifying the first resource as unavailable for a downlink data channel based at least in part on the collision; and/or the like. In some aspects, such means may include one or more components of UE120described in connection withFIG. 2.

In some aspects, a base station (e.g., BS110) may include means for identifying a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal; means for performing an action to mitigate the collision based at least in part on identifying the collision; means for canceling transmission of the downlink SPS communication or determining that the downlink SPS communication is not to be transmitted; means for canceling the transmission of the downlink SPS communication based at least in part on a configurable threshold associated with a ratio of overlapping resources or an effective rate of the downlink SPS communication; means for moving a demodulation reference signal of the downlink SPS communication to a third resource, wherein the third resource does not overlap the second resource; means for moving a demodulation reference signal of the downlink SPS communication to a third resource associated with a second pattern based at least in part on the third resource not overlapping the second resource; means for matching a data portion of the downlink SPS communication around an overlapping resource of the first resource and the second resource; means for puncturing the data portion of the downlink SPS communication on the overlapping resource; and/or the like. In some aspects, such means may include one or more components of BS110described in connection withFIG. 2.

As indicated above,FIG. 2is provided merely as an example. Other examples may differ from what is described with regard toFIG. 2.

Semi-persistent scheduling (SPS) is a mechanism for providing periodic resource allocations for a downlink transmission. For example, an SPS configuration may be associated with a fixed resource block allocation. An SPS communication may be associated with a payload (e.g., a downlink shared channel) and a reference signal, such as a demodulation reference signal. In some radio access technologies, such as 5G/NR, downlink SPS communications may be scheduled at a shorter periodicity than in some legacy implementations to support periodic low-latency traffic. For example, a downlink SPS communication may be scheduled every 2 symbols, every 7 symbols, every slot, or at a different periodicity.

In the case of downlink SPS communications, it may be difficult to avoid collisions between the downlink SPS communications and other downlink signals, channels, or transmissions, particularly for downlink SPS communications with a short periodicity. In such a case, it may not be particularly helpful to always drop the colliding SPS communication, since this may impact performance of the downlink SPS communication. The other (e.g., colliding) downlink signals may include, for example, a synchronization signal or physical broadcast channel block (referred to herein as a synchronization signal block or an SS/PBCH block), a reference signal (e.g., a channel state information reference signal or another reference signal), a control resource set (CORESET), a rate-matched resource set, and/or the like.

Some techniques and apparatuses described herein provide techniques for mitigating collisions between a downlink SPS communication resource and a resource for another downlink signal or communication. For example, some techniques and apparatuses described herein provide for a base station to determine a resource allocation that mitigates the collision, to determine an action to perform to mitigate the collision, to transmit the communications in a way that mitigates the collision, and/or the like. In some aspects, some techniques and apparatuses described herein provide for a wireless communication device (e.g., a UE) to determine an action that may be performed by another wireless communication device (e.g., a base station) to mitigate the collision, to determine a resource allocation to be used to mitigate the collision, and/or the like. In this way, collision between a downlink SPS communication and another signal or communication is mitigated, thereby improving performance of the downlink SPS communication and the other signal or communication, particularly in the case of short-periodicity SPS communications.

FIG. 3is a diagram illustrating an example300of collision handling for semi-persistently scheduled signals, in accordance with various aspects of the present disclosure.

As shown inFIG. 3, and by reference number310, a BS110may configure a downlink SPS communication for a UE120. In some aspects, the BS110may transmit configuration information, control information, scheduling information, and/or the like to configure the downlink SPS communication. In some aspects, the BS110may configure the downlink SPS communication for a first resource. For example, the first resource may repeat every N resources (e.g., symbols, slots, subframes, and/or the like), wherein N is an integer.

The downlink SPS communication may include or comprise a reference signal (e.g., a demodulation reference signal (DMRS) or another reference signal) and a data portion (e.g., a physical downlink shared channel (PDSCH) or another data channel). The UE120may be unable to decode the data portion if the reference signal is not successfully received. The first resource may include one or more resources (e.g., symbols, tones, and/or the like) to be used for the reference signal and the data portion.

As shown by reference number320, the BS110may identify a collision between a first resource for the downlink SPS communication and a second resource for another downlink signal. In some aspects, the collision may be associated with, for example, high-priority traffic (e.g., ultra-reliable low-latency traffic), and/or the like. For example, the BS110may determine that the first resource and the second resource at least partially overlap. In some aspects, the other downlink signal may include a synchronization signal block, a rate-matched resource, a resource element-level reserved resource (e.g., a cell-specific reference signal, a zero-power channel state information reference signal, and/or the like), a channel state information reference signal, and/or the like.

In some aspects, the BS110may determine which part of the first resource or the second resource is associated with the collision. For example, the BS110may determine whether a part of the first resource associated with a reference signal of the downlink SPS communication, or a part of the first resource associated with a data portion of the downlink SPS communication, is associated with the collision. The BS110may select an action to perform based at least in part on the part of the first resource or the second resource that is associated with the collision.

As shown by reference number330, the BS110may perform an action to mitigate the collision based at least in part on identifying the collision. In some aspects, the BS110may determine an action to perform, as described in more detail below. In some aspects, the BS110may perform scheduling of the downlink SPS communication and the other downlink signal based at least in part on the action to mitigate the collision. In some aspects, the action to mitigate the collision may be scheduling the downlink SPS communication and the other downlink signal to reduce or eliminate the collision. In this way, the BS110may reduce collisions between the downlink SPS communication and the other downlink signal.

In some aspects, the other downlink signal may include a synchronization signal block or a rate-matched resource set. For example, the other downlink signal may be associated with a resource block-level reserved resource. In some aspects, the BS110may cancel the downlink SPS communication. For example, the BS110may determine that the downlink SPS communication is not to be transmitted in the first resource. In some aspects, the BS110may move the downlink SPS communication to a third resource that does not overlap or collide with the second resource. For example, when the other downlink communication collides with a DMRS of the downlink SPS communication, the BS110may move the DMRS to the third resource, and/or may rate match a data portion of the downlink SPS communication. This is described in more detail in connection withFIG. 4, below.

In some aspects, the BS110may selectively cancel transmission of the downlink SPS communication (or may determine that the downlink SPS communication is not to be transmitted). For example, the BS110may selectively cancel the transmission of the downlink SPS communication based at least in part on a threshold or condition. As one example, the BS110may cancel the transmission based at least in part on determining that a ratio of overlapping data portion resources (e.g., of the first resource and the second resource) satisfies a threshold. The threshold may be configurable (e.g., using radio resource control messaging or another technique). As another example, the BS110may cancel the transmission when an effective rate of the data portion of the downlink SPS communication is greater than a scheduled rate of the data portion (e.g., signaled using a modulation and coding scheme value) by a threshold amount. As a third example, the BS110may cancel the transmission of the downlink SPS communication when no resource is available for the DMRS of the downlink SPS communication (e.g., when the other downlink signal occupies an entirety of the downlink SPS communication).

In some aspects, the other downlink signal may include a resource element-level reserved resource, such as a cell-specific reference signal or a zero power channel state information reference signal, a non-zero-power channel state information reference signal, and/or the like. In such a case, if a DMRS of the downlink SPS communication collides with a resource of the other downlink signal, then the BS110may move the DMRS to another resource. For example, if a first DMRS group of a symbol is used for the downlink SPS communication, and/or if resources for a second DMRS group of the symbol are available (e.g., if resources for a second DMRS group of the symbol are not allocated to another UE, or to another DMRS port of the same UE), and/or if the resources for the second DMRS group do not collide with the other downlink signal, then the BS110may move the DMRS to the resources of the second DMRS group. If the above conditions are not satisfied (e.g., if the resources of the second DMRS group are not available or collide with the other downlink signal), then the BS110may move the DMRS to another symbol that does not collide with the other downlink signal. In the above cases, the BS110may rate match a data portion of the downlink SPS communication around the occupied resources, or may puncture a data portion of the downlink SPS communication. For a more detailed description of collision mitigation in the resource element-level reserved resource case, refer to the description ofFIG. 5, below.

In some aspects, the first resource and the second resource may be associated with the same symbol (e.g., the same OFDM symbol). In such a case, the first resource need not overlap the second resource in the frequency domain for a collision to occur. For example, if the downlink SPS communication and the other downlink signal are associated with different spatial quasi-collocation (QCL) assumptions, then it may be impossible to transmit the downlink SPS communication and the other downlink signal using a single beam on overlapping OFDM symbols.

In some aspects, when the downlink SPS communication and the other downlink signal are scheduled for the same symbol with different QCL assumptions (e.g., QCL configurations), then the BS110may determine an action to perform based at least in part on a priority rule. For example, the BS110may selectively cancel the downlink SPS communication, or the other downlink signal, based at least in part on respective priority levels associated with the downlink SPS communication and the other signal. As another example, the BS110may cancel the downlink SPS communication when the downlink SPS communication and the other downlink signal are scheduled on overlapping OFDM symbols with different QCL assumptions, regardless of whether the frequency resources for the downlink SPS communication and the other downlink signal overlap or not.

In some aspects, when the downlink SPS communication and the other downlink signal are scheduled for the same symbol with different QCL assumptions, then the BS110may determine that the symbol is unavailable for the downlink SPS communication, and may move a DMRS of the downlink data channel to a non-colliding symbol. In such a case, the BS110may rate match the data channel accordingly (e.g., the BS110may rate match the data portion of the downlink SPS communication around the overlapping OFDM symbol, and around the DMRS of the downlink SPS communication).

In some aspects, the downlink SPS communication may be scheduled on OFDM symbols1,2, . . . , K, and the other signal may be scheduled on a subset (2,3, . . . , K-1). That is, there may be parts of the downlink SPS communication that are scheduled before the other signal and parts that are scheduled after the other signal. In this case, when the UE120and/or the network does not have contemporaneous multi-beam reception/transmission capability, then the downlink SPS communication may not be transmitted on the overlapping symbols. However, since the downlink SPS communication is divided into two non-contiguous parts, both parts may need to contain DMRS in order for the BS110to decode the data correctly. For example, since there is a beam direction transition between the two-part transmission, the BS110may not be able to maintain a phase coherence between the two parts. Hence, the channel estimated from the first part of the downlink SPS communication may be different from the channel estimated in the second part of the downlink SPS communication. Thus, channel estimation results cannot be shared across the two parts of the transmission. In this case, the BS110may perform one or more of the below actions.

In some aspects, the BS110may transmit the DMRS in both parts, and may rate-match data around the DMRS. For example, if the original downlink SPS communication contains 2 DMRS symbols, then by moving some DMRS symbols if necessary, the BS110may guarantee that both parts contain DMRS symbol.

In some aspects, the BS110may transmit only one part (e.g., the part that contains DMRS), and may cancel the part that does not contain DMRS. For example, this may occur when the original downlink SPS communication only contains 1 DMRS symbol or if one of the parts does not include enough resources to transmit both the DMRS and the corresponding data.

In some aspects, the BS110may cancel the transmission, for example, based at least in part on the BS110not being able to transmit DMRS in both parts or the downlink SPS communication being cut into two non-contiguous parts.

In some aspects, the UE120may be associated with a multi-panel reception capability, meaning that the UE120may be capable of contemporaneous reception of two or more downlink signals with different spatial QCL information. In that case, the UE120may signal a maximum number of contemporaneous receptions that the UE120is capable of receiving. The BS110may select a number of colliding downlink signals to be transmitted to the UE120based at least in part on respective priorities of the colliding downlink signals. In that case, the BS110may perform one or more additional actions described elsewhere herein to mitigate the collision of the colliding downlink signals when transmitting the colliding downlink signals.

In some aspects, the BS110may select the number of colliding downlink signals based at least in part on a capability of a network associated with the BS110and/or the UE120. For example, the BS110may select the number of colliding downlink signals based at least in part on a number of contemporaneous transmissions, to the UE120, that the network is capable of performing or configured to perform (e.g., based at least in part on a number of transmit-receive points (TRPs), antenna panels, and/or the like available to the network for transmitting to the UE120).

As shown by reference number340, in some aspects, the UE120may determine the action performed by the BS110to mitigate the collision. For example, the UE120may determine that the downlink SPS communication collides with (e.g., overlaps) the other downlink signal (e.g., based at least in part on scheduling information, a configuration of the UE120, and/or the like), and may determine the action to be performed by the BS110to mitigate the collision. In this way, the UE120may determine the action to be performed without explicit signaling of the action by the BS110, thereby reducing overhead associated with mitigating the collision.

In some aspects, if the downlink SPS communication is canceled, the UE120may send a NACK to the BS110for the canceled transmission or may not send any ACK/NACK for the canceled transmission. In the case when the downlink SPS communication is canceled, the UE120may still receive the other uncanceled signals. For example, if the downlink SPS communication collides with a downlink channel state information reference signal (CSI-RS), and the downlink SPS communication is canceled, the UE120may still receive the CSI-RS.

As indicated above,FIG. 3is provided as an example. Other examples may differ from what is described with respect toFIG. 3.

FIG. 4is a diagram illustrating an example400of collision handling for semi-persistent scheduling signals for a synchronization signal block or a rate-matched resource, in accordance with various aspects of the present disclosure.FIG. 4shows resource allocations for a synchronization signal block (shown as SSB) and a downlink SPS communication. A DMRS of the downlink SPS communication is shown by the squares with diagonal hatching, and a remainder of the downlink SPS communication is a data channel of the downlink SPS communication. The horizontal direction inFIG. 4represents time and the vertical direction inFIG. 4represents frequency. Here, the DMRS of the downlink SPS communication is provided in a single OFDM symbol.

Reference number410shows a collision between the synchronization signal block and the downlink SPS communication. As can be seen, the synchronization signal block collides with one or more DMRSs of the downlink SPS communication. This may impact reception of the downlink SPS communication, since demodulation of the downlink SPS communication may be difficult or impossible if the DMRS is interrupted, punctured, or blocked.

Reference number420shows an action to mitigate the collision. As can be seen, the DMRS may be moved to a resource (e.g., an OFDM symbol) that does not collide with the synchronization signal block. In some aspects, the resource may be a next available OFDM symbol (e.g., a next available OFDM symbol that does not overlap with the synchronization signal block). The data channel of the downlink SPS communication may be rate-matched accordingly. In this way, the collision between the downlink SPS communication and the other downlink symbol (e.g., the synchronization signal block) is mitigated. In some aspects, if there is no OFDM symbol available for the DMRS transmission (e.g., if all OFDM symbols of the downlink SPS communication overlap with the synchronization signal block), then the downlink SPS communication may be canceled (e.g., may not be transmitted from the BS110).

As indicated above,FIG. 4is provided as an example. Other examples may differ from what is described with respect toFIG. 4.

FIG. 5is a diagram illustrating an example500of collision handling for semi-persistent scheduling signals for a resource element-level reserved resource or a reference signal, in accordance with various aspects of the present disclosure.FIG. 5shows resource allocations for a resource element-level resource allocation and a downlink SPS communication. The horizontal direction inFIG. 5represents time and the vertical direction inFIG. 5represents frequency. Resources of a single OFDM symbol are shown before collision mitigation (on the left) and after collision mitigation (on the right). A DMRS of the downlink SPS communication is shown by the squares with diagonal hatching. The DMRS may be associated with a pattern, such as a first comb in a comb-2 structure. In the comb-2 structure shown inFIG. 5, the DMRS is transmitted on the first comb (e.g., using even-indexed resource elements starting from zero). A second pattern of resources is shown using a gray fill. For example, the second pattern may be a second comb pattern. The second comb pattern is the second comb in the comb-2 structure (e.g., odd-indexed resource elements). The first pattern may be for a DMRS for a first UE (e.g., UE120) and the second pattern may be for a DMRS for a second UE (e.g., UE120) or other signal. Here, the resources of the second pattern are available (e.g., not being used for the second UE). Here, the DMRS of the downlink SPS communication is provided in a single OFDM symbol. A UE (e.g., UE120) may determine whether the second comb (e.g., the grey resources in FIG.5, or the odd-indexed resource elements) is occupied by another UE based at least in part on the DMRS port indication received from a base station in an activation downlink control information (DCI).

As shown by reference number510, a collision may occur with regard to the DMRS and another downlink signal. As shown by reference number520, when the resources of the second pattern are available, the BS110may shift the DMRS to the resources of the second pattern. Thus, the other signal can be transmitted in the overlapping resource (shown using dotted fill) and the DMRS can be transmitted in the second pattern. If the second pattern were occupied, the BS110might cancel transmission of the DMRS (and therefore the downlink SPS communication), move the DMRS to a later available OFDM symbol, or may perform a different action.

As indicated above,FIG. 5is provided as an example. Other examples may differ from what is described with respect toFIG. 5.

FIG. 6is a diagram illustrating an example process600performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process600is an example where a UE (e.g., UE120, and/or the like) performs collision handling for an SPS signal.

As shown inFIG. 6, in some aspects, process600may include identifying a collision between a first resource for a downlink semi-persistently scheduled (SPS) communication and a second resource for another downlink signal (block610). For example, the base station (e.g., using controller/processor240, transmit processor220, TX MIMO processor230, MOD232, antenna234, and/or the like) may identify a collision. The collision may be between a first resource for a downlink SPS communication and a second resource for another downlink signal.

As shown inFIG. 6, in some aspects, process600may include determining an action, to be performed by a base station, to mitigate the collision based at least in part on identifying the collision (block620). For example, the UE (e.g., using antenna252, DEMOD254, MIMO detector256, receive processor258, controller/processor280, and/or the like) may determine an action, to be performed by a base station (e.g., BS110), to mitigate the collision based at least in part on identifying the collision. The action may include one or more of the actions described in connection withFIGS. 3-5, above.

As shown inFIG. 6, in some aspects, process600may include selectively receiving the downlink SPS communication and the other downlink signal based at least in part on the determination (block630). For example, the UE (e.g., using antenna252, DEMOD254, MIMO detector256, receive processor258, controller/processor280, and/or the like) may selectively receive the downlink SPS communication or the other downlink signal. The UE may selectively receive the downlink SPS communication and/or the other downlink signal based at least in part on the determination.

In a first aspect, the first resource is for a demodulation reference signal of the downlink SPS communication. In a second aspect, alone or in combination with the first aspect, the action may include canceling transmission of the downlink SPS communication. In a third aspect, alone or in combination with the first aspect and/or the second aspect, the wireless communication device may transmit a negative acknowledgment for the downlink SPS communication. In a fourth aspect, alone or in combination with any one or more of the first through third aspects, the wireless communication device may receive the other downlink signal based at least in part on the downlink SPS communication being canceled. In a fifth aspect, alone or in combination with any one or more of the first through fourth aspects, canceling the transmission includes canceling the transmission of the downlink SPS communication based at least in part on a configurable threshold associated with a ratio of overlapping resources or an effective rate of the downlink SPS communication. In a sixth aspect, alone or in combination with any one or more of the first through fifth aspects, canceling the transmission of the downlink SPS communication is based at least in part on there being no resource available or limited resource availability (e.g., no resource availability, resource availability that fails to satisfy a threshold, and/or the like) for a demodulation reference signal of the downlink SPS communication.

In a seventh aspect, alone or in combination with any one or more of the first through sixth aspects, the action may include determining that the downlink SPS communication is not to be transmitted. In an eighth aspect, alone or in combination with any one or more of the first through seventh aspects, the action may include may moving a demodulation reference signal of the downlink SPS communication to a third resource, wherein the third resource does not overlap the second resource. In some aspects, the third resource is a next sequential resource that does not overlap the second resource.

In a ninth aspect, alone or in combination with any one or more of the first through eighth aspects, the other downlink signal is associated with a synchronization signal block or a rate-matched resource set. In a tenth aspect, alone or in combination with any one or more of the first through ninth aspects, the other downlink signal is associated with a resource element-level reserved resource or a channel state information reference signal. In an eleventh aspect, alone or in combination with any one or more of the first through tenth aspects, the first resource is associated with a first pattern. The action may include moving a demodulation reference signal of the downlink SPS communication to a third resource associated with a second pattern based at least in part on the third resource not overlapping the second resource.

In a twelfth aspect, alone or in combination with any one or more of the first through eleventh aspects, the action may include rate matching a data portion of the downlink SPS communication around an overlapping resource of the first resource and the second resource. In a thirteenth aspect, alone or in combination with any one or more of the first through twelfth aspects, the action may include puncturing a data portion of the downlink SPS communication on an overlapping resource of the first resource and the second resource. In a fourteenth aspect, alone or in combination with any one or more of the first through thirteenth aspects, the first resource and the second resource are associated with a same symbol, and the downlink SPS communication and the other downlink signal are associated with a different spatial quasi-collocation configuration.

In a fifteenth aspect, alone or in combination with any one or more of the first through fourteenth aspects, the action may include identifying the first resource as unavailable for a downlink data channel based at least in part on the collision. In a sixteenth aspect, alone or in combination with any one or more of the first through fifteenth aspects, the action is based at least in part on a priority rule associated with the downlink SPS communication and the other downlink signal.

In a seventeenth aspect, alone or in combination with any one or more of the first through sixteenth aspects, the action is based at least in part on a capability of a recipient of the downlink SPS communication relating to contemporaneous reception of multiple spatial beams. In an eighteenth aspect, alone or in combination with any one or more of the first through seventeenth aspects, the collision is between the SPS signal and multiple other downlink signals including the other signal, and a subset of the SPS signal and the multiple other downlink signals is selected for transmission based at least in part on the capability.

In a nineteenth aspect, alone or in combination with any one or more of the first through eighteenth aspects, the action is based at least in part on whether a network associated with the wireless communication device is configured to perform contemporaneous transmission of multiple spatial beams for the downlink SPS communication and the other downlink signal.

AlthoughFIG. 6shows example blocks of process600, in some aspects, process600may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted inFIG. 6. Additionally, or alternatively, two or more of the blocks of process600may be performed in parallel.

FIG. 7is a diagram illustrating an example process700performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process700is an example where a base station (e.g., BS110, and/or the like) performs collision handling for an SPS signal.

As shown inFIG. 7, in some aspects, process700may include identifying a collision between a first resource for a downlink semi-persistent scheduled (SPS) communication and a second resource for another downlink signal (block710). For example, the base station (e.g., using controller/processor240, controller/processor280, and/or the like) may identify a collision. The collision may be between a first resource for a downlink SPS communication and a second resource for another downlink signal.

As shown inFIG. 7, in some aspects, process700may include performing an action to mitigate the collision based at least in part on identifying the collision (block720). For example, the base station (e.g., using controller/processor240, transmit processor220, TX MIMO processor230, MOD232, antenna234, controller/processor280, transmit processor264, TX MIMO processor266, MOD254, antenna252, and/or the like) may perform an action to mitigate the collision. The base station may perform the action based at least in part on identifying the collision. The action may include one or more of the actions described in connection withFIGS. 3-5, above.

In a first aspect, the first resource is for a demodulation reference signal of the downlink SPS communication. In a second aspect, alone or in combination with the first aspect, the base station may cancel transmission of the downlink SPS communication. In a third aspect, alone or in combination with the first aspect and/or the second aspect, the base station may cancel the transmission of the downlink SPS communication based at least in part on a configurable threshold associated with a ratio of overlapping resources or an effective rate of the downlink SPS communication. In a fourth aspect, alone or in combination with any one or more of the first through third aspects, canceling the transmission of the downlink SPS communication is based at least in part on there being no resource available for a demodulation reference signal of the downlink SPS communication.

In a fifth aspect, alone or in combination with any one or more of the first through fourth aspects, the base station may determine that the downlink SPS communication is not to be transmitted. In a sixth aspect, alone or in combination with any one or more of the first through fifth aspects, the base station may move a demodulation reference signal of the downlink SPS communication to a third resource, wherein the third resource does not overlap the second resource. In a seventh aspect, alone or in combination with any one or more of the first through sixth aspects, the third resource is a next sequential resource that does not overlap the second resource.

In an eighth aspect, alone or in combination with any one or more of the first through seventh aspects, the other downlink signal is associated with a synchronization signal block or a rate-matched resource set. In a ninth aspect, alone or in combination with any one or more of the first through eighth aspects, the other downlink signal is associated with a resource element-level reserved resource or a channel state information reference signal. In a tenth aspect, alone or in combination with any one or more of the first through ninth aspects, the first resource is associated with a first pattern. The base station may move a demodulation reference signal of the downlink SPS communication to a third resource associated with a second pattern based at least in part on the third resource not overlapping the second resource.

In an eleventh aspect, alone or in combination with any one or more of the first through tenth aspects, the base station may rate match a data portion of the downlink SPS communication around an overlapping resource of the first resource and the second resource. In a twelfth aspect, alone or in combination with any one or more of the first through third aspects, the base station may puncture a data portion of the downlink SPS communication on an overlapping resource of the first resource and the second resource. In a thirteenth aspect, alone or in combination with any one or more of the first through twelfth aspects, the first resource and the second resource are associated with a same symbol, and the downlink SPS communication and the other downlink signal are associated with a different spatial quasi-collocation configuration.

In a fourteenth aspect, alone or in combination with any one or more of the first through thirteenth aspects, the base station may identify the first resource as unavailable for a downlink data channel based at least in part on the collision. In a fifteenth aspect, alone or in combination with any one or more of the first through fourteenth aspects, the action is based at least in part on a priority rule associated with the downlink SPS communication and the other downlink signal.

In a sixteenth aspect, alone or in combination with any one or more of the first through third aspects, the action is based at least in part on a capability of a recipient of the downlink SPS communication relating to contemporaneous reception of multiple spatial beams. In a seventeenth aspect, alone or in combination with any one or more of the first through sixteenth aspects, the collision is between the SPS signal and multiple other downlink signals including the other signal, and a subset of the SPS signal and the multiple other downlink signals is selected for transmission based at least in part on the capability.

In an eighteenth aspect, alone or in combination with any one or more of the first through seventeenth aspects, the action is based at least in part on whether a network associated with the base station is configured to perform contemporaneous transmission of multiple spatial beams for the downlink SPS communication and the other downlink signal.

AlthoughFIG. 7shows example blocks of process700, in some aspects, process700may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted inFIG. 7. Additionally, or alternatively, two or more of the blocks of process700may be performed in parallel.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term component is intended to be broadly construed as hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, or a combination of hardware and software.