RS availability indication by paging PDCCH and PEI

Methods, computer programs products, and apparatuses for RS availability indication are provided. An example method at a UE may include receiving, from a base station, a PEI comprising a first availability indication for a first set of RS resources in one or more RS occasions. The example method may further include receiving, from the base station, a paging PDCCH comprising a second availability indication for a second set of RS resources in the one or more RS occasions. The example method may further include receiving, from the base station, at least one of the first set of RS resources or the second set of RS resources.

TECHNICAL FIELD

The present disclosure relates generally to communication systems, and more particularly, to wireless communication systems with paging early indication (PEI), physical downlink control channel (PDCCH), and reference signal (RS).

INTRODUCTION

BRIEF SUMMARY

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus at a user equipment (UE) are provided. The apparatus may include a memory and at least one processor coupled to the memory. The memory and the at least one processor coupled to the memory may be configured to receive, from a base station, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. The memory and the at least one processor coupled to the memory may be further configured to receive, from the base station, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. The memory and the at least one processor coupled to the memory may be further configured to receive, from the base station, at least one of the first set of RS resources or the second set of RS resources.

In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus at a base station are provided. The apparatus may include a memory and at least one processor coupled to the memory. The memory and the at least one processor coupled to the memory may be configured to transmit, to a UE, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. The memory and the at least one processor coupled to the memory may be further configured to transmit, to the UE, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. The memory and the at least one processor coupled to the memory may be further configured to transmit, to the UE, at least one of the first set of RS resources or the second set of RS resources.

DETAILED DESCRIPTION

Referring again toFIG.1, in some aspects, the UE104may include a RS component198. In some aspects, the RS component198may be configured to receive, from a base station, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. In some aspects, the RS component198may be further configured to receive, from the base station, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. In some aspects, the RS component198may be further configured to receive, from the base station, at least one of the first set of RS resources or the second set of RS resources.

In certain aspects, the base station180may include an availability component199. In some aspects, the availability component199may be configured to transmit, to a UE, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. In some aspects, the availability component199may be further configured to transmit, to the UE, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. In some aspects, the availability component199may be further configured to transmit, to the UE, at least one of the first set of RS resources or the second set of RS resources.

At least one of the TX processor368, the RX processor356, and the controller/processor359may be configured to perform aspects in connection with the RS component198ofFIG.1.

A UE in a communication system may enter an idle state or an inactive state to preserve battery power if the UE does not have an ongoing data transmission. In the idle state, the UE may monitor for a paging message at a set of defined times. The UE is able to preserve power because the UE may turn off a receiver at the UE when the UE is not monitoring for the paging message. For example, DRX and other similar techniques may be employed by the UE to preserve battery power. When a network receives new data for the UE or determines to transmit new data to the UE for a variety of reasons such as PWS or other emergency, the network may transmit a paging message to probe the idle UE so that the UE may receive the new data. The base station may send the page for any of a number of reasons, e.g., to trigger a radio resource control set up with the UE, to provide a system information modification to the UE, or to provide a public warning system notification to the UE.

To save power, TRS or CSI-RS for idle/inactive mode UEs and PEI may be provided for a UE. A TRS may be sparse reference signals intended to assist the UE in time and frequency tracking. The idle/inactive mode UEs may be configured to receive the TRS for performing tracking loop updates, for example. A TRS may have been configured for one or more connected mode UEs and there may be no dedicated idle/inactive TRS. An idle/inactive UE may benefit from an increased density of RS opportunities for tracking loop updates including both SSB and TRS/CSI-RS, which may allow the idle/inactive UE to have a longer duration in a low power mode. For example, the UE may employ a longer deep sleep time between reception of the TRS. For example, if a TRS with a 20 millisecond (ms) periodicity is configured, the joint SSB/TRS periodicity may be 10 ms on average.

A PEI may be used by a base station to indicate whether any UE is paged in a paging occasion (PO). A PEI may be transmitted before a PO. A PEI may be sequence based (e.g., secondary synchronization signal or CSI-RS/TRS based) or PDCCH based. The PEI may indicate the UE whether to decode paging PDCCH/PDSCH in the PO. The PEI may also be used in connection with UE subgrouping (splitting UEs in the same PO into smaller groups). If subgroups of UEs are configured, the PEI may indicate whether any subgroup is paged (e.g., one of the UEs in a particular subgroup). If a subgroup of UEs is not configured, the PEI may indicate whether any UEs (e.g., among all UEs) in the PO is paged. The power consumption for receiving the PEI may be potentially lower than decoding a paging PDCCH. The PEI may also facilitate power saving because paging PDSCH decoding may be reduced. In addition, with PEI, UE may skip extra SSBs used by tracking loop accuracy for paging PDSCH decoding, in order to achieve further power savings at the UE.

In some wireless communication systems, SIB signaling may provide a configuration of TRS/CSI-RS occasion(s), and periodic TRS may be supported while non-periodic TRS may not be supported. Layer 1 (L1) signaling may be used to indicate whether the TRS is transmitted in a particular configured occasion by paging PDCCH, PEI, or SIB. Before a UE receives the indication, the UE may assume that TRS is not transmitted and blind detection may not be used. A TRS may be quasi-colocated (QCL'd) (e.g., have a same quasi-colocation) with a transmitted SSB. If a first signal transmitted via a first antenna port and a second signal transmitted via a second antenna port have common defined radio channel properties when being processed at a receiver, the two signals and the two antenna ports are QCL'ed. The common defined radio channel properties may be different depending on the specific QCL type. As an example, there may be multiple QCL types, such as QCL Type A which includes Doppler shift, Doppler spread, average delay, and delay spread; QCL Type B which includes Doppler shift and Doppler spread; QCL Type C which includes average delay and Doppler shift; and QCL Type D which includes spatial receiving parameters. In such wireless communication systems, SCS of TRS may be the same as SCS of a defined control resource set (CORESET), such as CORESET #0. A UE may not be expected to receive the TRS outside the initial DL BWP and radio resource measurement (RRM) measurement with the TRS for serving cell may be up to UE implementation.

Some aspects provided herein may provide support for a paging PDCCH based availability indication of RS (such as TRS, CSI-RS, or the like) occasions for idle/inactive UEs and support for a PEI based availability indication of RS (such as TRS, CSI-RS, or the like) occasions for idle/inactive UEs.

FIG.4is a diagram400illustrating example RS availability indication, PEI and PDCCH. The RS illustrated inFIG.4may be CSI-RS, TRS, or the like. A network may configure (e.g., a base station in the network may transmit to a UE to configure) transmission occasions of N (e.g., N≥1) RS resources to the UE via SIB. PEI or paging PDCCH may indicate to the UE which RS (one or more) of the NRS resources are transmitted in their configured occasions. If an RS will be transmitted in an RS resource (e.g., would be transmitted), the RS resource may be referred to as “available” to the UE. For example, as illustrated inFIG.4, the configured RS occasions may include RS402A, RS402B, RS404A, and RS404B. The RS402A and RS402B may be unavailable (e.g., the RS would not be transmitted) and the RS404A and RS404B may be available (e.g., the RS would be transmitted). PEI406, paging PDCCH408, and paging PDSCH410may also be transmitted to the UE.

The base station may transmit the availability indication based on different granularity levels. The term granularity may be used to refer to a level of detail of representing resources in an indication. For example, a first indication with a first granularity may include one or more bits each representing a RS resource (may be referred to as “per RS resource granularity”). In another example, a second indication with a second granularity may include one or more bits each representing a set of RS resources (may be referred to as “per RS resource set granularity”). In another example, a third indication associated with a third granularity may include one or more bits representing a group of RS resource sets (may be referred to as “per group of RS resource sets granularity”). In another example, a fourth indication associated with a fourth granularity may include one or more bits representing whether any RS resources are transmitted in an upcoming PO (may be referred to as “all configured RS resources granularity”). The SIB may provide configuration for the RS resource, RS resource set, group of RS resource sets, or the like. A RS resource, a RS resource set, or a group of RS resource sets may be referred to as a “resource unit”.

In some aspects, an availability indication may be based on a bitmap where each bit indicates availability for each resource unit. In some aspects, an availability indication may be based on a codepoint indicating availability for a resource unit. In some aspects, paging PDCCH may be used to carry an indication of idle/inactive mode TRS so that support of PEI and idle/inactive RS features may be decoupled (e.g., independently support PEI and idle/inactive RS features may be possible).

FIG.5is a diagram illustrating an example communication flow500between a UE502and a base station504. As illustrated inFIG.5, the base station504may transmit a PEI506to a UE502. After transmitting the PEI506, the base station may transmit a paging PDCCH508to the UE502and RS510which may include one or more RS may be transmitted. The PEI506may correspond with the PEI406inFIG.4, the PEI606inFIG.6, the PEI706inFIG.7, the PEI806inFIG.8, the PEI906inFIG.9, or the PEI1006inFIG.1006. The paging PDCCH508may correspond with the paging PDCCH408inFIG.4, the paging PDCCH608inFIG.6, the paging PDCCH708inFIG.7, the paging PDCCH808inFIG.8, the paging PDCCH908inFIG.9, or the paging PDCCH1008inFIG.1008. The RS510may correspond with any RS inFIG.4andFIGS.5-10. In some aspects, both the PEI506and the paging PDCCH508carry availability indication for RS resources (e.g., RS510) in configured RS occasions. At512, the UE502may track, such as perform time or frequency tracking, based on a TRS in RS510or measure based on a CSI-RS in RS510.

FIG.6is a diagram600illustrating example RS availability indications in PEI and PDCCH. In some aspects, PEI and paging PDCCH may provide a same availability indication for a same set of RS resources with a same granularity. As illustrated inFIG.6, the PEI606may carry a RS availability indication616indicating availabilities of RS604A, RS604B, RS604C, and RS604D based on a granularity of per RS. The paging PDCCH608may also carry a RS availability indication618indicating RS availabilities of RS604A, RS604B, RS604C, and RS604D based on a granularity of per RS. Even though the RS availability indication618and the RS availability indication616indicate availability of same RSs with a same granularity, the RS availability indication618and the RS availability indication616may carry the same information or different information. For example, a network (e.g., the base station504) may change the transmission of a RS resource in a timeframe between the transmission of the PEI606and the paging PDCCH608. For example, the base station504may change the RS604B from available to unavailable; accordingly, the availability indication616may indicate that RS604B would be available and the availability indication618may indicate that RS604B would not be available. If there is no change, the UE502may obtain the same information about availability of configured RS resources from both the PEI606and the paging PDCCH608. In some aspects, the PEI606may be a PDCCH based PEI (e.g., that may carry more information bits than a sequence based PEI). In some aspects, the PEI606may not be a sequence based PEI.

As another example, if reserved bits (which may include 6 or 8 bits) of the paging PDCCH608are used to carry the availability indication information, the PEI606may also have the same amount of information bits for availability indication. For example, if RS resources 0, 1, 2, 3 corresponding to RS604A, RS604B, RS604C, and RS604D are configured, both PEI and paging PDCCH may have a 4-bit bitmap with per resource indication granularity and value “1100” indicating that RS resources 0 and 1 are transmitted but RS resources 2 and 3 are not transmitted.

As another example, RS resources 0, 1, 2, 3 may be configured and RS resources 0, 1 may be configured by network in RS resource set 0 and RS resources 2, 3 are configured in RS resource set 1, bitmap 10 with per resource set granularity may indicate that the two RS resources in resource set 0 are transmitted but the two RS resources in resource set 1 are not transmitted.

In some aspects, the PEI506and the paging PDCCH508may provide different availability indication. For example, the PEI506and the paging PDCCH508may provide availability indication for different RS, or for same RS with different granularity of indication, or provide availability indication for different RS with different granularity of indication.

In some aspects, the PEI506and the paging PDCCH508may jointly provide availability indication for configured RS resources.FIG.7is a diagram700illustrating example RS availability indications in PEI and PDCCH. As illustrated inFIG.7, the PEI706may carry a RS availability indication716indicating availabilities of a first set of RS including RS704A and RS704B and a second set of RS including RS704C and RS704D based on a granularity of per RS set. The paging PDCCH708may also carry a RS availability indication718indicating availabilities of RS704A, RS704B, RS704C, and RS704D based on a granularity of per RS. By way of example, the availability indication716may include a bitmap with value 11 representing that one or more RS in the first set of RSs including RS704A and704B is available and one or more RS in the second set of RSs including RS704C and704D is available. The availability indication718may include a bitmap with value “1010” representing RS704A and RS704C are available and RS704B and704D are not available. In another example, the availability indication716may indicate whether any RS among RS704A, RS704B, RS704C, or RS704D may be available.

In some aspects, the PEI506and the paging PDCCH508may independently provide availability indication for configured RS resources.FIG.8is a diagram800illustrating example RS availability indications in PEI and PDCCH. As illustrated inFIG.8, the PEI806may carry a RS availability indication816indicating an availabilities of RS804A and RS804B. The paging PDCCH808may carry a RS availability indication818indicating availabilities of RS804C, and RS804D. For example, in some aspects, the RS availability indication816may include a 2-bit bitmap indicating whether RS804A and RS804B would be available and the RS availability indication818may include another 2-bit bitmap indicating whether RS804C and RS804D would be available. In some aspects, the RS availability indicated by the RS availability indication816and the RS availability indication818may be partially common. For example, the RS availability indication818may additionally indicate whether RS804B would be available.

In some aspects, if availability is provided for a subset of all configured RS resources, a UE may assume that other RSs outside the subset may not be available.FIG.9is a diagram900illustrating example RS availability indications in PEI and PDCCH. As illustrated inFIG.9, the PEI906may carry a RS availability indication916indicating an availabilities of RS904A. The paging PDCCH908may carry a RS availability indication918indicating availabilities of RS904C, and RS904D. The UE502may assume that the RS904B may not be available because no availability information is provided.

In some aspects, if availability is provided for a subset of all configured RS resources, a UE may determine whether a RS outside the subset is available based on a previous availability indication, such as a lastly received availability indication. If this is the first time that the UE receives an availability indication of configured RS occasions, the UE may assume that the RS resource is not available (e.g., would not be transmitted).FIG.10is a diagram1000illustrating example RS availability indications in PEI and PDCCH. As illustrated inFIG.10, the PEI1006may carry a RS availability indication1016indicating an availability of RS1004A. The paging PDCCH1008may carry a RS availability indication1018indicating availability of RS1004C. Based on a previously received availability indication1038, the UE may determine that the second RS, RS1004B, may be available because a corresponding RS1014B is available in a previous PO.

FIG.11is a flowchart1100of a method of wireless communication. The method may be performed by a UE (e.g., the UE104, the UE502; the apparatus1302). The method may be used for improving operating efficiency of a UE capable of entering idle mode.

At1102, the UE may receive, from a base station, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. For example, the UE502may receive, from a base station504, a PEI506including a first availability indication for a first set of RS resources in one or more RS occasions. In some aspects,1102may be performed by PEI component1442inFIG.14.

At1104, the UE may receive, from the base station, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. For example, the UE502may receive, from the base station504, a paging PDCCH508including a second availability indication for a second set of RS resources in the one or more RS occasions. In some aspects,1104may be performed by PDCCH component1444inFIG.14.

At1106, the UE may receive, from the base station, at least one of the first set of RS resources or the second set of RS resources. For example, the UE502may receive, from the base station504, at least one of the first set of RS resources or the second set of RS resources in the RS510. In some aspects,1106may be performed by RS component1446inFIG.14.

FIG.12is a flowchart1200of a method of wireless communication. The method may be performed by a UE (e.g., the UE104, the UE502; the apparatus1302). The method may be used for improving operating efficiency of a UE capable of entering idle mode.

At1202, the UE may receive, from a base station, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. For example, the UE502may receive, from a base station504, a PEI506including a first availability indication for a first set of RS resources in one or more RS occasions. In some aspects,1202may be performed by PEI component1442inFIG.14. In some aspects, the RS may include one or more of a CSI-RS or a TRS. In some aspects, the first availability indication is based on one of: 1) a bitmap including one or more bits, each bit representing availability for a resource unit, or 2) a codepoint indicating availability for a resource unit. In some aspects, the one or more RS occasions are configured via a SIB.

At1204, the UE may receive, from the base station, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. For example, the UE502may receive, from the base station504, a paging PDCCH508including a second availability indication for a second set of RS resources in the one or more RS occasions. In some aspects,1204may be performed by PDCCH component1444inFIG.14. In some aspects, the second availability indication is based on one of: 1) a bitmap including one or more bits, each bit representing availability for a resource unit, or 2) a codepoint indicating availability for a resource unit.

In some aspects, the first set of RS resources is identical to the second set of RS resources. For example, as illustrated inFIG.6, the first set of RS resources indicated by the RS availability indication616is identical to the second set of RS resources indicated by the RS availability indication618. In some aspects, the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being equal to the second granularity. For example, as illustrated inFIG.6, the RS availability indication616indicates RSs based on a granularity of per RS and the RS availability indication618also indicates RSs based on a granularity of per RS.

In some aspects, the first availability indication includes different information than the second availability indication. For example, the RS availability indication616may indicate that RS604B would be available while the RS availability indication618may indicate that RS604B would not be available due to a change of circumstances.

In some aspects, the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being different from the second granularity. For example, as illustrated inFIG.7, the RS availability indication716may indicate RS based on a granularity of a group of RS and the RS availability indication718may indicate RSs based on a granularity of per RS. In some aspects, the first set of RS resources is different from the second set of RS resources. For example, as illustrated inFIG.8, the first set of RS resources may include RS804A and RS804B and the second set of RS resources may include RS804B, RS804C and RS804D.

In some aspects, at1208, the UE may jointly interpret the first availability indication and the second availability indication. In some aspects,1208may be performed by RS component1446inFIG.14. For example, as illustrated inFIG.7, the availability indication718may indicate that one or more RS in the group of RSs704A,704B one or more RS in the group of RSs704C and704D are available and the availability indication716may indicate which RS in the groups may be available.

In some aspects, the first availability indication is independent from the second availability indication. For example, as illustrated inFIG.8, the RS availability indication816and the RS availability indication818may be independent.

In some aspects, the one or more RS occasions is associated with a first subset of a set of configured RS occasions, and the UE may, at1210, skip a second subset of the set of configured RS occasions. For example, as illustrated inFIG.9, the UE may assume that a second subset (e.g., RS904B) of the set of configured RS occasions is not available. In some aspects, the one or more RS occasions is associated with a first subset of a set of configured RS occasions, and the UE may, at1210, determine that a second subset of the set of configured RS occasions will be transmitted based on a last availability indication. For example, as illustrated inFIG.10, the UE may determine that a second subset (e.g., RS1004) of the set of configured RS occasions will be transmitted based on a last availability indication (e.g., availability indication1038). In some aspects, at1210, if the last availability indication is not present, the UE may skip reception of the second subset of the set of configured RS occasions.

At1206, the UE may receive, from the base station, at least one of the first set of RS resources or the second set of RS resources. For example, the UE502may receive, from the base station504, at least one of the first set of RS resources or the second set of RS resources in the RS510. In some aspects,1206may be performed by RS component1446inFIG.14.

FIG.13is a flowchart1300of a method of wireless communication. The method may be performed by a base station (e.g., the base station102/180, the base station504; the apparatus1402). The method may be used for improving operating efficiency of a UE capable of entering idle mode.

At1302, the base station may transmit, to a UE, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. For example, the base station504may transmit, to a UE502, a PEI506including a first availability indication for a first set of RS resources in one or more RS occasions. In some aspects,1202may be performed by PEI component1542inFIG.15. In some aspects, the RS may include one or more of a CSI-RS or a TRS. In some aspects, the first availability indication is based on one of: 1) a bitmap including one or more bits, each bit representing availability for a resource unit, or 2) a codepoint indicating availability for a resource unit. In some aspects, the one or more RS occasions are configured via a SIB.

At1304, the base station may transmit, to the UE, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. For example, the base station504may transmit, to the UE502, a paging PDCCH508including a second availability indication for a second set of RS resources in the one or more RS occasions. In some aspects,1304may be performed by PDCCH component1544inFIG.15. In some aspects, the second availability indication is based on one of: 1) a bitmap including one or more bits, each bit representing availability for a resource unit, or 2) a codepoint indicating availability for a resource unit.

In some aspects, the first set of RS resources is identical to the second set of RS resources. For example, as illustrated inFIG.6, the first set of RS resources indicated by the RS availability indication616is identical to the second set of RS resources indicated by the RS availability indication618. In some aspects, the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being equal to the second granularity. For example, as illustrated inFIG.6, the RS availability indication616indicates RSs based on a granularity of per RS and the RS availability indication618also indicates RSs based on a granularity of per RS.

In some aspects, the first availability indication includes different information than the second availability indication. For example, the RS availability indication616may indicate that RS604B would be available while the RS availability indication618may indicate that RS604B would not be available due to a change of circumstances. In some aspects, the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being different from the second granularity. For example, as illustrated inFIG.7, the RS availability indication716may indicate RS based on a granularity of a group of RS and the RS availability indication718may indicate RSs based on a granularity of per RS. In some aspects, the first set of RS resources is different from the second set of RS resources. For example, as illustrated inFIG.8, the first set of RS resources may include RS804A and RS804B and the second set of RS resources may include RS804B, RS804C and RS804D.

At1306, the base station may transmit, to the UE, at least one of the first set of RS resources or the second set of RS resources. For example, the base station504may transmit, to the UE502, at least one of the first set of RS resources or the second set of RS resources in the RS510. In some aspects,1306may be performed by RS component1546inFIG.15.

FIG.14is a diagram1400illustrating an example of a hardware implementation for an apparatus1402. The apparatus1402may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus1402may include a cellular baseband processor1404(also referred to as a modem) coupled to a cellular RF transceiver1422. In some aspects, the apparatus1402may further include one or more subscriber identity modules (SIM) cards1420, an application processor1406coupled to a secure digital (SD) card1408and a screen1410, a Bluetooth module1412, a wireless local area network (WLAN) module1414, a Global Positioning System (GPS) module1416, or a power supply1418. The cellular baseband processor1404communicates through the cellular RF transceiver1422with the UE104and/or BS102/180. The cellular baseband processor1404may include a computer-readable medium/memory. The computer-readable medium/memory may be non-transitory. The cellular baseband processor1404is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the cellular baseband processor1404, causes the cellular baseband processor1404to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the cellular baseband processor1404when executing software. The cellular baseband processor1404further includes a reception component1430, a communication manager1432, and a transmission component1434. The communication manager1432includes the one or more illustrated components. The components within the communication manager1432may be stored in the computer-readable medium/memory and/or configured as hardware within the cellular baseband processor1404. The cellular baseband processor1404may be a component of the UE350and may include the memory360and/or at least one of the TX processor368, the RX processor356, and the controller/processor359. In one configuration, the apparatus1402may be a modem chip and include just the cellular baseband processor1404, and in another configuration, the apparatus1402may be the entire UE (e.g., see350ofFIG.3) and include the additional modules of the apparatus1402.

The communication manager1432may include a PEI component1442that is configured to receive, from a base station, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions, e.g., as described in connection with1102inFIGS.11and1202inFIG.12. The communication manager1432may further include a component1444that may be configured to receive, from the base station, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions, e.g., as described in connection with1104inFIGS.11and1204inFIG.12. The communication manager1432may further include a component1446that may be configured to receive, from the base station, at least one of the first set of RS resources or the second set of RS resources, e.g., as described in connection with1106inFIGS.11and1206-1210inFIG.12.

As shown, the apparatus1402may include a variety of components configured for various functions. In one configuration, the apparatus1402, and in particular the cellular baseband processor1404, may include means for receiving, from a base station, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. The cellular baseband processor1404may further include means for receiving, from the base station, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. The cellular baseband processor1404may further include means for receiving, from the base station, at least one of the first set of RS resources or the second set of RS resources. The means may be one or more of the components of the apparatus1402configured to perform the functions recited by the means. As described supra, the apparatus1402may include the TX Processor368, the RX Processor356, and the controller/processor359. As such, in one configuration, the means may be the TX Processor368, the RX Processor356, and the controller/processor359configured to perform the functions recited by the means.

FIG.15is a diagram1500illustrating an example of a hardware implementation for an apparatus1502. The apparatus1502may be a base station, a component of a base station, or may implement base station functionality. In some aspects, the apparatus1302may include a baseband unit1504. The baseband unit1504may communicate through a cellular RF transceiver1522with the UE104. The baseband unit1504may include a computer-readable medium/memory. The baseband unit1504is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the baseband unit1504, causes the baseband unit1504to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the baseband unit1504when executing software. The baseband unit1504further includes a reception component1530, a communication manager1532, and a transmission component1534. The communication manager1532includes the one or more illustrated components. The components within the communication manager1532may be stored in the computer-readable medium/memory and/or configured as hardware within the baseband unit1504. The baseband unit1504may be a component of the base station310and may include the memory376and/or at least one of the TX processor316, the RX processor370, and the controller/processor375.

The communication manager1532may include a PEI component1542that may transmit, to a UE, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions, e.g., as described in connection with1302inFIG.13. The communication manager1532further may include a PDCCH component1544that may transmit, to the UE, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions, e.g., as described in connection with1304inFIG.13. The communication manager1532further may include a RS component1546that may transmit, to the UE, at least one of the first set of RS resources or the second set of RS resources, e.g., as described in connection with1306inFIG.13.

As shown, the apparatus1502may include a variety of components configured for various functions. In one configuration, the apparatus1502, and in particular the baseband unit1504, may include means for transmitting, to a UE, a PEI including a first availability indication for a first set of RS resources in one or more RS occasions. The baseband unit1504may further include means for transmitting, to the UE, a paging PDCCH including a second availability indication for a second set of RS resources in the one or more RS occasions. The baseband unit1504may further include means for transmitting, to the UE, at least one of the first set of RS resources or the second set of RS resources. The means may be one or more of the components of the apparatus1502configured to perform the functions recited by the means. As described supra, the apparatus1502may include the TX Processor316, the RX Processor370, and the controller/processor375. As such, in one configuration, the means may be the TX Processor316, the RX Processor370, and the controller/processor375configured to perform the functions recited by the means.

Aspect 1 is an apparatus for wireless communication at a UE, comprising: a memory;

and at least one processor coupled to the memory and configured to: receive, from a base station, a PEI comprising a first availability indication for a first set of RS resources in one or more RS occasions; receive, from the base station, a paging PDCCH comprising a second availability indication for a second set of RS resources in the one or more RS occasions; and receive, from the base station, at least one of the first set of RS resources or the second set of RS resources.

Aspect 2 is the apparatus of aspect 1, wherein the first set of RS resources is identical to the second set of RS resources, and wherein the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being equal to the second granularity.

Aspect 3 is the apparatus of any of aspects 1-2, wherein the first availability indication comprises different information than the second availability indication.

Aspect 4 is the apparatus of any of aspects 1-3, wherein the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being different from the second granularity.

Aspect 5 is the apparatus of any of aspects 1-4, wherein the memory and the at least one processor are configured to jointly interpret the first availability indication and the second availability indication.

Aspect 6 is the apparatus of any of aspects 1-5, wherein the first set of RS resources is different from the second set of RS resources.

Aspect 7 is the apparatus of any of aspects 1-4 or 6, wherein the first availability indication is independent from the second availability indication.

Aspect 8 is the apparatus of any of aspects 1-7, wherein the one or more RS occasions is associated with a first subset of a set of configured RS occasions, and wherein the memory and the at least one processor are configured to skip a second subset of the set of configured RS occasions.

Aspect 9 is the apparatus of any of aspects 1-8, wherein the one or more RS occasions is associated with a first subset of a set of configured RS occasions, and wherein the memory and the at least one processor are configured to determine that a second subset of the set of configured RS occasions will be transmitted based on a last availability indication.

Aspect 10 is the apparatus of any of aspects 1-8, wherein the memory and the at least one processor are configured to skip reception of the second subset of the set of configured RS occasions if the last availability indication is not present.

Aspect 11 is the apparatus of any of aspects 1-10, wherein the first set of RS resources and the second set of RS resources are for a CSI-RS or a TRS.

Aspect 12 is the apparatus of any of aspects 1-11, wherein the one or more RS occasions are configured via a SIB.

Aspect 13 is the apparatus of any of aspects 1-12, wherein the first availability indication is based on one of: a bitmap comprising one or more bits, each bit representing an availability for a resource unit, or a codepoint indicating the availability for the resource unit.

Aspect 14 is the apparatus of any of aspects 1-13, wherein the second availability indication is based on one of: a bitmap comprising one or more bits, each bit representing availability for a resource unit, or a codepoint indicating the availability for the resource unit.

Aspect 15 is the apparatus of any of aspects 1-14, further comprising a transceiver coupled to the at least one processor.

Aspect 16 is an apparatus for wireless communication at a base station, comprising:

a memory; and at least one processor coupled to the memory and configured to: transmit, to a UE, a PEI comprising a first availability indication for a first set of RS resources in one or more RS occasions; transmit, to the UE, a paging PDCCH comprising a second availability indication for a second set of RS resources in the one or more RS occasions; and transmit, to the UE, at least one of the first set of RS resources or the second set of RS resources.

Aspect 17 is the apparatus of aspect 16, wherein the first set of RS resources is identical to the second set of RS resources, and wherein the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being equal to the second granularity.

Aspect 18 is the apparatus of any of aspects 16-17, wherein the first availability indication comprises different information than the second availability indication.

Aspect 19 is the apparatus of any of aspects 16-18, wherein the first availability indication is associated with a first granularity and the second availability indication is associated with a second granularity, the first granularity being different from the second granularity.

Aspect 20 is the apparatus of any of aspects 16-19, wherein the first availability indication and the second availability indication are configured to jointly indicate reference signal availability.

Aspect 21 is the apparatus of any of aspects 16-20, wherein the first set of RS resources is different from the second set of RS resources.

Aspect 22 is the apparatus of any of aspects 16-19 or 21, wherein the first availability indication is independent from the second availability indication.

Aspect 23 is the apparatus of any of aspects 16-22, wherein the first set of RS resources and the second set of RS resources are for a CSI-RS or a TRS.

Aspect 24 is the apparatus of any of aspects 16-23, wherein the one or more RS occasions are configured via SIB.

Aspect 25 is the apparatus of any of aspects 16-24, wherein the first availability indication is based on one of: a bitmap comprising one or more bits, each bit representing availability for a resource unit, or a codepoint indicating the availability for the resource unit.

Aspect 26 is the apparatus of any of aspects 16-25, wherein the second availability indication is based on one of: a bitmap comprising one or more bits, each bit representing an availability for a resource unit, or a codepoint indicating the availability for the resource unit.

Aspect 27 is the apparatus of any of aspects 16-26, further comprising a transceiver coupled to the at least one processor.