Search space coreset selection for low power wide area network

Abstract

Systems, methods, apparatuses, and computer program products methods for configuring UE search space with multiple CORESETs. One method may include receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

Description

SEARCH SPACE CORESET SELECTION FOR LOW POWER WIDE AREANETWORKTECHNICAL FIELD

[0001] Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as 3rdGeneration Partnership Project (3GPP) Long Term Evolution (LTE), 5thgeneration (5G) radio access technology (RAT), new radio (NR) access technology, 6thgeneration (6G) RAT, and / or other communications systems. For example, certain example embodiments may relate to systems and / or methods for configuring UE search space with multiple CORESETs.BACKGROUND

[0002] Examples of mobile or wireless telecommunication systems may include radio frequency (RF) 5G RAT, the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), LTE Evolved UTRAN (E-UTRAN), LTE- Advanced (LTE- A), LTE- A Pro, NR access technology, and / or MulteFire Alliance, or any future RAT (e.g., 6G). 5G wireless systems refer to the next generation (NG) of radio systems and network architecture. A 5G system is typically built on a 5G NR, but a 5G (or NG) network may also be built on E-UTRA radio. It is expected that NR can support service categories such as enhanced mobile broadband (eMBB), ultra-reliable low-latency-communication (URLLC), and massive machine-type communication (mMTC). NR is expected to deliver extreme broadband, ultra-robust, low-latency connectivity, and massive networking to support the Internet of Things (loT). The next generation radio access network (NG-RAN) represents the radio access network (RAN) for 5G, which may provide radio access for NR, LTE, and LTE- A. It is noted that the nodes in 5G providing radio access functionality to a user equipment (e.g. , similar to the Node B in UTRAN or the Evolved Node B (eNB) in LTE) may be referred to as next-generation Node B (gNB) when built on NR radio, and may be referred to as nextgeneration eNB (NG-eNB) when built on E-UTRA radio.SUMMARY

[0003] In accordance with some example embodiments, a method may include receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. Themethod may further include monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0004] In accordance with certain example embodiments, an apparatus may include means for receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The apparatus may further include means for monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0005] In accordance with various example embodiments, a non-transitory computer readable medium may include program instructions that, when executed by an apparatus, cause the apparatus to perform at least a method. The method may include receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The method may further include monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0006] In accordance with some example embodiments, a computer program product may perform a method. The method may include receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The method may further include monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0007] In accordance with certain example embodiments, an apparatus may include at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to receive, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configurationassociated with the plurality of CORESETs. The at least one memory and instructions, when executed by the at least one processor, may further cause the apparatus at least to monitor for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0008] In accordance with various example embodiments, an apparatus may include receiving circuitry configured to perform receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The apparatus may further include monitoring circuitry configured to perform monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0009] In accordance with some example embodiments, a method may include determining a plurality of control resource sets, CORESETs, for a search space. The method may further include transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The method may further include transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0010] In accordance with certain example embodiments, an apparatus may include means for determining a plurality of control resource sets, CORESETs, for a search space. The apparatus may further include means for transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The apparatus may further include means for transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0011] In accordance with various example embodiments, a non-transitory computer readable medium may include program instructions that, when executed by an apparatus, cause the apparatus to perform at least a method. The method may include determining a plurality of control resource sets, CORESETs, for a search space. The method may further includetransmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The method may further include transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0012] In accordance with some example embodiments, a computer program product may perform a method. The method may include determining a plurality of control resource sets, CORESETs, for a search space. The method may further include transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The method may further include transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0013] In accordance with certain example embodiments, an apparatus may include at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to determine a plurality of control resource sets, CORESETs, for a search space. The at least one memory and instructions, when executed by the at least one processor, may further cause the apparatus at least to transmit, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The at least one memory and instructions, when executed by the at least one processor, may further cause the apparatus at least to transmit, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0014] In accordance with various example embodiments, an apparatus may include determining circuitry configured to perform determining a plurality of control resource sets, CORESETs, for a search space. The apparatus may further include transmitting circuitry configured to perform transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs. The apparatus may further include transmitting circuitry configured to performtransmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0015] In accordance with some example embodiments, a method may include receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs. The method may further include determining, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor. The method may further include monitoring physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0016] In accordance with certain example embodiments, an apparatus may include means for receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs. The apparatus may further include means for determining, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor. The apparatus may further include means for monitoring physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0017] In accordance with various example embodiments, a non-transitory computer readable medium may include program instructions that, when executed by an apparatus, cause the apparatus to perform at least a method. The method may include receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs. The method may further include determining, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor. The method may further include monitoring physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0018] In accordance with some example embodiments, a computer program product may perform a method. The method may include receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs. The method may further include determining, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor. The method may further include monitoring physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0019] In accordance with certain example embodiments, an apparatus may include at least one processor and at least one memory storing instructions that, when executed by the at leastone processor, cause the apparatus at least to receive, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs. The at least one memory and instructions, when executed by the at least one processor, may further cause the apparatus at least to determine, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor. The at least one memory and instructions, when executed by the at least one processor, may further cause the apparatus at least to monitor physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0020] In accordance with various example embodiments, an apparatus may include receiving circuitry configured to perform receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs. The apparatus may further include determining circuitry configured to perform determining, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor. The apparatus may further include monitoring circuitry configured to perform monitoring physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0021] In accordance with some example embodiments, a method may include determining a plurality of control resource sets, CORESETs, to be configured for a search space. The method may further include transmitting, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.

[0022] In accordance with certain example embodiments, an apparatus may include means for determining a plurality of control resource sets, CORESETs, to be configured for a search space. The apparatus may further include means for transmitting, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.

[0023] In accordance with various example embodiments, a non-transitory computer readable medium may include program instructions that, when executed by an apparatus, cause the apparatus to perform at least a method. The method may include determining a plurality of control resource sets, CORESETs, to be configured for a search space. The method may further include transmitting, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.

[0024] In accordance with some example embodiments, a computer program product may perform a method. The method may include determining a plurality of control resource sets,CORESETs, to be configured for a search space. The method may further include transmitting, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.

[0025] In accordance with certain example embodiments, an apparatus may include at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to determine a plurality of control resource sets, CORESETs, to be configured for a search space. The at least one memory and instructions, when executed by the at least one processor, may further cause the apparatus at least to transmit, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.

[0026] In accordance with various example embodiments, an apparatus may include determining circuitry configured to perform determining a plurality of control resource sets, CORESETs, to be configured for a search space. The apparatus may further include transmitting circuitry configured to perform transmitting, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.BRIEF DESCRIPTION OF THE DRAWINGS

[0027] For a proper understanding of example embodiments, reference should be made to the accompanying drawings, wherein:

[0028] FIG. 1 illustrates PDCCH repetition across configured CORESETs;

[0029] FIG. 2 illustrates an example of a WUS instructing a UE of which CORESET to monitor in a next search space occasion according to certain example embodiments;

[0030] FIG. 3 illustrates a UE switching CORESETs to monitor at the start of each search space occasion according to some example embodiments;

[0031] FIG. 4 illustrates an example of a signaling diagram according to various example embodiments;

[0032] FIG. 5 illustrates an example of another signaling diagram according to certain example embodiments;

[0033] FIG. 6 illustrates an example of a flow diagram of a method according to certain example embodiments;

[0034] FIG. 7 illustrates an example of a flow diagram of a method according to some example embodiments;

[0035] FIG. 8 illustrates an example of a flow diagram of a method according to various example embodiments;

[0036] FIG. 9 illustrates an example of a flow diagram of a method according to certain example embodiments;

[0037] FIG. 10 illustrates an example of various network devices according to some example embodiments; and

[0038] FIG. 11 illustrates an example of a 5G network and system architecture according to certain example embodiments.DETAILED DESCRIPTION

[0039] It will be readily understood that the components of certain example embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of some example embodiments of systems, methods, apparatuses, and computer program products for configuring UE search space with multiple CORESETs is not intended to limit the scope of certain example embodiments, but is instead representative of selected example embodiments.

[0040] Low Power Wide Area (LPWA) networks may experience challenges with PDCCH blocking. This may occur when PDCCH repetition is used to support coverage enhancement in LPWA networks, therefore consuming all CORESET resources, and preventing the network from scheduling other UEs.

[0041] LPWA networks may support loT devices. Such LPWA networks may have low device complexity / costs; low device power consumption, thereby enabling long battery life of greater than 10 years; enhanced coverage compared to broadband services (e.g., up to 20- 25 dB enhanced coverage); support for massive number of devices; delay tolerant data transmission e.g., up to 10 seconds to transmit a data packet); and / or infrequent data transmissions.

[0042] LPWA networks based on NB-IoT and LTE-M technologies were introduced in 4G LTE. 3GPP 5G did not specify new LPWA technologies since NB-IoT and LTE-M continue to be supported for massive loT use cases. 6G may introduce a new lightweight radio protocol for LPWA. Such 6G LPWA may include a sunset of 4G LTE, and replacement technology once 4G LTE carriers are no longer supported. 6G LPWA may also improve on4G LTE solutions by introducing a simple lightweight radio protocol with essential features all in the same release. A single solution may also address massive loT use cases.

[0043] LPWA networks may be designed to support enhanced coverage compared to broadband services. For example, NB-IoT and LTE-M may support up to 20 dB enhanced coverage, and 6G LPWA may have similar targets. The table below provides an example of the maximum coupling loss (MCL) for a rural cell (e.g., 700MHz FDD NLOS 021 scenario). As an example, when using MCL of 134 dB for PUSCH VoIP as the limiting factor in the link budget, 20 dB coverage enhancement may require support of 154 dB MCL for all channels. For the PDCCH, the MCL shown in Table 1 is 146 dB for an eMBB UE with 2 Rx antennas. For LPWA UE with 1 Rx antenna, the MCL may be degraded by at least 3 dB. Thus, to reach 154 dB MCL, coverage enhancement of at least 11 dB may be required (z.e., 154 - (146 - 3) = 11 dB). Different types of PDCCH coverage enhancements may be needed for other deployment types and scenarios.

[0044] In 3GPP NR, the UE may monitor the PDCCH on a search space configured by the network. The search space may be common or UE specific. An example RRC search space configuration is shown below:SearchSpace ::= SEQUENCE {searchSpaceld SearchSpaceld, controlResourceSetld ControlResourceSetld monitoringSlotPeriodicityAndOffset CHOICE { sll NULL, s!2 INTEGER (0..1), s!4 INTEGER (0..3),} duration INTEGER (2..2559) monitoringSymbolsWithinSlot BIT STRING (SIZE (14)) nrofCandidates SEQUENCE {}}

[0045] The parameter controlResourceSetld indicates the associated CORESET ID to be used for this search space, where the CORESET is configured separately by RRC. The parameter monitoringSlotPeriodicityAndOffset denotes the slots for PDCCH monitoring configured as periodicity and offset. The parameter duration denotes the number of consecutive slots that a search space lasts in every occasion.

[0046] Repetition may be used to enhance PDCCH coverage. FIG. 1 illustrates an example where the PDCCH is transmitted four times, denoted as repetition factor of 4. The PDCCH may be repeated in subsequent CORESET occasions, rather than continuously, to allow for PDSCH transmission in the remaining symbols of the slot. Four repetitions may provide a coverage enhancement of 6 dB, although the actual amount may be less due to non-ideal channel estimation. FIG. 1 shows that each PDCCH transmission can take up the entire timefrequency resources of the CORESET (i.e., all the control channel elements (CCEs) in the CORESET are used for PDCCH transmission to one UE, which may correspond to the highest aggregation level that is supported). As a result, the network may be blocked from scheduling downlink and uplink transmissions (i.e., PDSCH / PUSCH) to other UEs. This blocking issue may be significant since a large number of PDCCH repetitions may be needed. For instance, if a PDCCH repetition factor of 64 is needed to reach the worst-case UE, this would block the network from scheduling other UEs for 64 slots. Multiple orthogonal search spaces / CORESETs may be configured for the UE to simultaneously monitor; however, this may increase UE complexity and power consumption, which should be avoided for LPWA UE.

[0047] Certain example embodiments described herein may have various benefits and / or advantages to overcome the disadvantages described above. For example, certain example embodiments may avoid PDCCH blocking, and minimize UE complexity and power consumption. Various example embodiments may also provide alternative CORESET(s) that may be used to schedule UEs when a CORESET in a search space is occupied due to PDCCH repetition. Some example embodiments may also expand the use cases for 6G LPWA, improving its adaptability. Thus, certain example embodiments discussed below are directed to improvements in computer-related technology.

[0048] Certain example embodiments are directed to configuring the search space of the UE with more than one CORESET. At each search space monitoring occasion, the UE may only monitor one CORESET in the search space, thereby minimizing PDCCH blocking, UE complexity, and power consumption.

[0049] In some example embodiments, the search space of the UE for monitoring the PDCCH may be configured with more than one CORESET. The number of CORESETs configured (e.g., up to a specified maximum) may be based on the search space type e.g., only UE-specific search space). Alternatively, the number of CORESETs configured may be based on the supported DCI formats for the search space (z.e., multiple CORESETs may only be allowed for certain DCI formats). The DCI formats for which multiple CORESETs are allowed may be defined in the specification, or be indicated in the search space.

[0050] In various example embodiments, the UE may only monitor only one CORESET at each search space monitoring occasion. In order for the UE to determine which CORESET to monitor, the network may instruct the UE to monitor a particular CORESET for the upcoming search space occasion via an indication signal (e.g. , using Wake-Up Signal (WUS) or Low-Power Wake-Up Signal (LP-WUS)). As another example embodiment, the network may instruct the UE when the UE should use a CORESET e.g., by configuring a monitoringSlotPeriodicityAndOffset for each configured CORESET). Furthermore, a predefined rule may be specified (e.g., UE cycles through all configured CORESETs sequentially, or UE monitors a CORESET based on, for example, search space occasion, SFN, C-RNTI, maximum number of repetitions, CORESET monitoring pattern, timer, etc.).

[0051] FIG. 4 illustrates an example of a signaling diagram 400 for configuring UE search space with multiple CORESETs. Specifically, a network configures multiple CORESETs for a search space, and uses an indication signal (e.g., WUS or broadcast signal with toggle bit)to indicate to the UE which CORESET to monitor on an upcoming search space. If there is no indication, the UE does not monitor the search space. UE 420 and NE 430 may be similar to UE 1020 and NE 1010, respectively, as illustrated in FIG. 10, according to certain example embodiments.

[0052] At operation 401, NE 430 may transmit to UE 420 a synchronization signal block (SSB).

[0053] At operation 402, NE 430 may transmit to UE 420 a system information block (SIB)l message.

[0054] At operation 403, UE 420 may transmit to NE 430 a message (Msg)l. In addition, NE 430 may transmit Msg2 (z.e., random access response) to UE 420, and UE 420 may transmit to Msg3 to NE 430.

[0055] At operation 404, NE 430 may transmit to UE 420 Msg4.

[0056] At operation 405, NE 430 may determine that multiple CORESETs should be configured for a search space.

[0057] In certain example embodiments, NE 430 may determine whether multiple CORESETs should be configured based on at least one PDCCH performance metric (e.g., PDCCH load, blocking issues, PDCCH aggregation level distribution), network load, supported CE levels, etc. For example, NE 430 may configure overlapping CORESETs e.g., overlapping in timefrequency) or for one CORESET to be contained within another CORESET. This may allow the network to minimize the reserved CORESET resources, while minimizing or avoiding PDCCH blocking by CCE and aggregation level (AL) selection.

[0058] At operation 406, NE 430 may transmit to UE 420 at least one search space configuration.In certain example embodiments, the search space of UE 420 for monitoring the PDCCH may be configured with more than one CORESET. For example, using the NR RRC search space configuration as a baseline, two CORESETs may be configured for a particular search space ID, such as:SearchSpace ::= SEQUENCE { searchSpaceld SearchSpaceld, controlResourceSetldl ControlResourceSetld controlResourceSetId2 ControlResourceSetld monitoringSlotPeriodicityAndOffset CHOICE {} duration INTEGER (2..2559) monitoringSymbolsWithinSlot BIT STRING (SIZE (14)) nrofCandidates SEQUENCE {}}

[0059] Instead of separately defining controlResourceSetldl and controlResourceSetId2 , a list of CORESET IDs (z.e., a sequence or list of controlResourceSetld parameters) may be given (e.g., controlResourceSetldl , controlResourceSetld ) for example, as below: controlResourceSetldList SEQUENCE (SIZE( 1..maxNrofControlResourceSets))OF ControlResourceSetld

[0060] In various example embodiments, the number of CORESETs configured by NE 430 may be based on the search space type (e.g., a maximum number of CORESETs may be specified for only UE-specific search space).

[0061] In certain example embodiments, the number of CORESETs configured by NE 430 may be based on the supported DCI formats and / or types for the search space (e.g., multiple CORESETs are only allowed for certain DCI formats (e.g., only for those DCI formats with CRC scrambled by a certain RNTI such as C-RNTI)). For example, one of the configured CORESETs (e.g., the first CORESET) may be designated as a default CORESET. Moreover, the DCI formats for which multiple CORESETs are allowed may be pre-defined (e.g., in 3GPP specifications). The configured DCI formats for which only a single CORESET is allowed may only apply to only the default CORESET ; each of the configured DCI formats may apply to all the configured CORESETs.

[0062] Alternatively, the DCI formats for which multiple CORESETs are allowed may be indicated in the search space. For each configured DCI format, an optional bit may indicate whether multiple CORESETs are allowed for that DCI format; if this optional bit indication is absent for a DCI format, only a single CORESET (e.g., the default CORESET) may be allowed for that DCI format.

[0063] Since the CORESETs may share some of the same configuration parameters, configurations of controlResourceSet!d2, controlResourceSetldl . etc. may only need to provide differentials to controlResourceSetldl (e.g., different ID number, time-frequencyresources, etc.). Parameters not explicitly provided in those CORESET configurations may be the same as configured for controlResourceSetldl .

[0064] In certain example embodiments, NE 430 may configure UE 420 on when aCORESET is to be used by UE 420 e.g., by configuring a monitoringSlotPeriodicityAndOffset parameter in the search space information element for each configured CORESET), such as follows:SearchSpace ::= SEQUENCE { searchSpaceld SearchSpaceld, controlResourceSetldl ControlResourceSetld controlResourceSet!d2 ControlResourceSetld monitoringSlotPeriodicityAndOffsetl CHOICE { sll NULL, sl2 INTEGER (0..1), sl4 INTEGER (0..3), monitoringSlotPeriodicityAndOffset2 CHOICE { sll NULL, sl2 INTEGER (0..1), sl4 INTEGER (0..3),} duration INTEGER (2..2559) monitoringSymbolsWithinSlot BIT STRING (SIZE (14)) nrofCandidates SEQUENCE {}}

[0065] In some example embodiments, NE 430 may configure UE 420 to only monitor one CORESET when multiple CORESETs are configured for the search space (e.g. , an override). Based on a variety of factors (e.g., UE energy level, channel quality report, RSRP, buffer status report, coverage enhancement level, etc.), NE 430 may determine that UE 420 can be switched from one CORESET to the other via DO, MAC CE, or RRC message (e.g., RRC reconfiguration message). NE 430 may configure a timing pattern or timing mask to denote the CORESET that UE 420 should monitor on each search space occasion.

[0066] At operation 407, UE 420 may monitor for an indication signal, for example, WUS.

[0067] For example, UE 420 may be configured with different sequences or signals (e.g., WUS) to determine which CORESET it should monitor, either in the next search space occasion or all subsequent search space occasions. When UE 420 detects one of thesequences it is configured with, UE 420 may monitor all the DO formats that are applicable in the corresponding CORESET. Alternately, UE 420 may be configured with more than one groups where a group can be associated with a CORESET. However, when there is no indication, UE 420 may not monitor any CORESET for PDCCH.

[0068] Alternatively or additionally, a broadcast or groupcast signal may include a toggle bit associated with each CORESET, and the bit may be revised whenever there is a new PDCCH repeated in the associated CORESET. The signal may be based on a sequence (e.g. , on-off Keying (OOK), demodulation reference signal (DMRS)) or field in a channel (e.g., in physical broadcast channel (PBCH)) which may improve detection compared to the PDCCH. While monitoring the signal, UE 420 may skip monitoring a CORESET until the associated bit is toggled (e.g., when UE 420 has already detected a DCI not addressed to it in the CORESET, or if UE 420 has not detected any PDCCH transmissions in the CORESET (e.g., based on DMRS RSRP)).

[0069] At operation 408, NE 430 may transmit to UE 420 a CORESET indication signal. For example, as shown in FIG. 2, NE 430 may direct UE 420 at operation 408 via an indication signal (e.g., using Wake-Up Signal (WUS) or Low-Power Wake-Up Signal (LP-WUS)) to monitor a particular CORESET for the upcoming search space occasion.

[0070] At operation 409, UE 420 may monitor PDCCH on an indicated CORESET set. UE 420 may monitor only one CORESET at each search space monitoring occasion. For example, UE 420 may monitor in the configured default CORESET, and switch to the next CORESET in a configured pattern based on a timer or number of monitoring occasions. UE 420 may be configured with a timer or a counter which can be reset when UE 420 detects a DCI addressed to it; if UE 420 has not detected a DCI for it in a CORESET until the timer expires or until counter reaches a number of monitored occasions, UE 420 may switch to another CORESET.

[0071] In some example embodiments, UE 420 may monitor in the configured default CORESET, and switch to the next CORESET in a configured pattern based on a number of DCI repetitions not addressed to UE 420. For example, if UE 420 detects there is a DCI which is not addressed to it in a CORESET and determines that the DCI may repeat for a number of occasions (e.g. , by detecting a signal activating the CORESET directed to another UE, or by early decoding a repetition of the DCI), UE 420 may switch to another CORESET.

[0072] In various example embodiments, UE may be configured with more than one search space (z.e., instead of more than one CORESETs in a search space) at operation 406. If so, UE 420 may monitor only one search space at a time, and UE 420 may determine which search space the UE shall monitor based upon any of the techniques described above. This may minimize specification requirements, but may increase RRC overhead since additional search spaces may be defined.

[0073] At operation 410, UE 420 and NE 430 may exchange at least one UL / DL transmission (e.g., based on the DCI).

[0074] FIG. 5 illustrates an example of a signaling diagram 500 for configuring UE search space with multiple CORESETs. Specifically, the network configures multiple CORESETs for a search space. UE uses a predefined rule (e.g., predefined in specification) to determine which CORESET to monitor on an upcoming search space. UE 510 and NE 520 may be similar to UE 1020 and NE 1010, respectively, as illustrated in FIG. 10, according to certain example embodiments.

[0075] Operations 501-505 and 509 may be similar to operations 401-405 and 410, as discussed above.

[0076] At operation 506, NE 520 may configure UE 510 to only monitor one CORESET when multiple CORESETs are configured for the search space (e.g., an override). Based on a variety of factors (e.g., UE energy level, channel quality report, RSRP, buffer status report, coverage enhancement level, etc.), NE 430 may determine that UE 420 can be switched from one CORESET to the other via DCI, MAC CE, or RRC message (e.g., RRC reconfiguration message). NE 430 may configure a timing pattern or timing mask to denote the CORESET that UE 420 should monitor on each search space occasion.

[0077] At operation 507, based on at least one defined rule or network configuration, UE 510 may determine and select at least one CORESET from the plurality of control resource sets (CORESETs) on the search space to monitor. For example, UE 510 may select at least one predefined rule to determine which CORESET to monitor (e.g., based on SFN and / or RNTI). The predefined rules may be specified (e.g., UE cycles through all configured CORESETs, or UE selects a CORESET based on e.g., search space, SFN, RNTI, maximum number of repetitions, etc.). For example, as shown in FIG. 3, UE 510 may switch from one CORESET to another CORESET at the start of each search space. PDCCH and associated repetitions may be transmitted in the same CORESET within each search space period.

[0078] In various example embodiments, initial (or first) transmission may be transmitted on one CORESET (e.g., CORESET# 1 or the configured default CORESET), but repetitions may be transmitted on one or more of the other configured CORESETs (e.g., CORESET#2). If repetitions are transmitted in more than one other CORESET, UE 510 may follow a specified or configured switching pattern.

[0079] In certain example embodiments, UE 510 may select the CORESET based on its RNTI value and the SFN. For example, if UE 510 has an odd RNTI value, UE 510 may select the first CORESET in every odd system frame number, and the second CORESET in every even system frame number; if UE 510 has an even RNTI value, UE 510 may select the first CORESET in every even system frame number, and the second CORESET in every odd system frame number.

[0080] As an example, NE 520 may assign UEs with the same or similar scheduling pattern (e.g., sensors in the same area performing the same measurement functionality) with different CORESET, such as with an implicit RNTI indication. For example, NE 520 may assign two UEs having the same scheduling pattern with distinct parity RNTI values, thereby corresponding to different a CORESET per frame number.

[0081] NE 520 may assign the CORESET using the RNTI parity in the random access procedure using a Msg3 / Msg4 indication. Specifically, UE 510 may indicate in Msg3 to NE 520 its expected data type (e.g. , as part of an RRC Request message), and NE 520 may use this information to assign a deliberately chosen C-RNTI parity value in Msg4. As another example, where more than two CORESETs are configured, the value of RNTI may implicitly indicate the CORESET. The mapping between RNTI and CORESET may be signaled to UE 510 as part of Msg4. In another example, this mapping may be indicated in a broadcast message.

[0082] At operation 508, UE 510 may monitor PDCCH on the CORESET set determined at operation 507.

[0083] FIG. 6 illustrates an example of a flow diagram of a method 600 that may be performed by a UE, such as UE 1020 illustrated in FIG. 10, according to various example embodiments.

[0084] At step 601, the method may include receiving, from a network entity, such as NE 1010 illustrated in FIG. 10, at least one search space configuration associated with a plurality of CORESETs. The at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs.

[0085] At step 602, the method may further include monitoring for at least one CORESET indication signal from the network entity. The at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0086] In certain example embodiments, the method may further include receiving, from the network entity, the at least one CORESET indication signal associated with the at least one indication signal configuration.

[0087] In some example embodiments, the method may further include monitoring, based on the at least one CORESET indication signal, at least one physical downlink control channel, PDCCH, on the indicated one of the plurality of CORESETs associated with a search space.

[0088] In various example embodiments, a number of the plurality of CORESETs is associated with a search space type.

[0089] In certain example embodiments, a number of the plurality of CORESETs is associated with at least one downlink control information format configured for a search space of the at least one search space configuration.

[0090] In some example embodiments, the method may further include monitoring one CORESET of the plurality of CORESETs at each search space monitoring occasion.

[0091] In various example embodiments, the method may further include receiving the at least one CORESET indication signal to monitor a particular CORESET for an upcoming search space occasion.

[0092] In certain example embodiments, the at least one CORESET indication signal may include a wake-up signal or low-power wake-up signal.

[0093] In some example embodiments, the at least one search space configuration may indicate when a CORESET is to be monitored by the UE.

[0094] FIG. 7 illustrates an example of a flow diagram of a method 700 that may be performed by a NE, such as NE 1010 illustrated in FIG. 10, according to various example embodiments.

[0095] At step 701, the method may include determining a plurality of control resource sets, CORESETs, for a search space.

[0096] At step 702, the method may further include transmitting, to a user equipment such as UE 1020 illustrated in FIG. 10, at least one search space configuration associated with theplurality of CORESETs. The at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs.

[0097] At step 703, the method may further include transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0098] In certain example embodiments, the method may further include determining a number of the plurality of CORESETs to be configured based on at least one physical downlink control channel, PDCCH, performance metric.

[0099] In some example embodiments, the at least one PDCCH performance metric may include at least one of PDCCH load; blocking issues; PDCCH aggregation level distribution; network load; or supported coverage enhancement levels.

[0100] In various example embodiments, two or more of the plurality of CORESETs overlap in at least one of time domain or frequency domain; or at least one CORESET of the plurality of CORESETs is contained within another CORESET.

[0101] FIG. 8 illustrates an example of a flow diagram of a method 800 that may be performed by a UE, such as UE 1020 illustrated in FIG. 10, according to various example embodiments.

[0102] At step 801, the method may include receiving, from a network entity, such as NE 1010 illustrated in FIG. 10, at least one search space configuration associated with a plurality of CORESETs.

[0103] At step 802, the method may further include determining, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor.

[0104] At step 803, the method may further include monitoring PDCCH on the determined at least one CORESET.

[0105] In certain example embodiments, the network configuration includes a pattern based on a timer or number of monitoring occasions.

[0106] In some example embodiments, the method further includes monitoring at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0107] In various example embodiments, the method further includes monitoring, based on the at least one CORESET indication signal, the PDCCH on the indicated one of the plurality of CORESETs on the search space.

[0108] In certain example embodiments, a number of the plurality of CORESETs is associated with a search space type.

[0109] In some example embodiments, a number of the plurality of CORESETs is associated with at least one downlink control information format configured for a search space of the at least one search space configuration.

[0110] In various example embodiments, the method further includes monitoring one CORESET of the plurality of CORESETs at each search space monitoring occasion.

[0111] In certain example embodiments, the method may further include receiving the at least one CORESET indication signal to monitor a particular CORESET for an upcoming search space occasion.

[0112] In some example embodiments, the at least one CORESET indication signal may include a wake-up signal or low-power wake-up signal.

[0113] In various example embodiments, the at least one search space configuration may indicate when a CORESET is to be monitored by the apparatus.

[0114] FIG. 9 illustrates an example of a flow diagram of a method 900 that may be performed by a NE, such as NE 1010 illustrated in FIG. 10, according to various example embodiments.

[0115] At step 901, the method may include determining a plurality of control resource sets, CORESETs, to be configured for a search space.

[0116] At step 902, the method may further include transmitting, to a user equipment such as UE 1020 illustrated in FIG. 10, at least one search space configuration associated with the plurality of determined CORESETs.

[0117] In certain example embodiments, the at least one search space configuration ma include at least one defined rule comprising at least one of cycling through the plurality of CORESETs based on a search space occasion; system frame number; cell radio network temporary identifier; a maximum number of repetitions; a CORESET monitoring pattern; or a timer.

[0118] In some example embodiments, the method may further include determining a number of the plurality of CORESETs to be configured based on at least one physical downlink control channel, PDCCH, performance metric.

[0119] In various example embodiments, the at least one PDCCH performance metric may include at least one of PDCCH load; blocking issues; PDCCH aggregation level distribution; network load; or supported CE levels.

[0120] In certain example embodiments, two or more of the plurality of CORESETs overlap in at least one of time domain or frequency domain; or at least one CORESET of the plurality of CORESETs is contained within another CORESET.

[0121] FIG. 10 illustrates an example of a system according to certain example embodiments. In one example embodiment, a system may include multiple devices, such as, for example, NE1010 and / or UE 1020.

[0122] NE 1010 may be one or more of a base station (e.g., 3G UMTS NodeB, 4G LTE Evolved NodeB, 5G NR Next Generation NodeB, 6G NodeB), a serving gateway, a server, and / or any other access node or combination thereof.

[0123] NE 1010 may further include at least one gNB -centralized unit (CU), which may be associated with at least one gNB -distributed unit (DU). The at least one gNB-CU and the at least one gNB -DU may be in communication via at least one Fl interface, at least one Xn-C interface, and / or at least one NG interface via a 5thgeneration core (5GC) or 6thgeneration core (6GC).

[0124] UE 1020 may include one or more of a mobile device, such as a mobile phone, smart phone, personal digital assistant (PDA), tablet, or portable media player, digital camera, pocket video camera, video game console, navigation unit, such as a global positioning system (GPS) device, desktop or laptop computer, single-location device, such as a sensor or smart meter, or any combination thereof. Furthermore, NE 1010 and / or UE 1020 may be one or more of a citizens broadband radio service device (CBSD).

[0125] NE 1010 and / or UE 1020 may include at least one processor, respectively indicated as1011 and 1021. Processors 1011 and 1021 may be embodied by any computational or data processing device, such as a central processing unit (CPU), application specific integrated circuit (ASIC), or comparable device. The processors may be implemented as a single controller, or a plurality of controllers or processors.

[0126] At least one memory may be provided in one or more of the devices, as indicated at1012 and 1022. The memory may be fixed or removable. The memory may include computer program instructions or computer code contained therein. Memories 1012 and 1022 may independently be any suitable storage device, such as a non-transitory computer-readablemedium. The term “non-transitory,” as used herein, may correspond to a limitation of the medium itself (z.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., random access memory (RAM) vs. read-only memory (ROM)). A hard disk drive (HDD), random access memory (RAM), flash memory, or other suitable memory may be used. The memories may be combined on a single integrated circuit as the processor, or may be separate from the one or more processors. Furthermore, the computer program instructions stored in the memory, and which may be processed by the processors, may be any suitable form of computer program code, for example, a compiled or interpreted computer program written in any suitable programming language.

[0127] Processors 1011 and 1021, memories 1012 and 1022, and any subset thereof, may be configured to provide means corresponding to the various blocks of FIGs. 2-9. Although not shown, the devices may also include positioning hardware, such as GPS or micro electrical mechanical system (MEMS) hardware, which may be used to determine a location of the device. Other sensors are also permitted, and may be configured to determine location, elevation, velocity, orientation, and so forth, such as barometers, compasses, and the like.

[0128] As shown in FIG. 10, transceivers 1013 and 1023 may be provided, and one or more devices may also include at least one antenna, respectively illustrated as 1014 and 1024. The device may have many antennas, such as an array of antennas configured for multiple input multiple output (MIMO) communications, or multiple antennas for multiple RATs. Other configurations of these devices, for example, may be provided. Transceivers 1013 and 1023 may be a transmitter, a receiver, both a transmitter and a receiver, or a unit or device that may be configured both for transmission and reception.

[0129] The memory and the computer program instructions may be configured, with the processor for the particular device, to cause a hardware apparatus, such as UE, to perform any of the processes described above (z.e., FIGs. 2-9). Therefore, in certain example embodiments, a non-transitory computer-readable medium may be encoded with computer instructions that, when executed in hardware, perform a process such as one of the processes described herein. Alternatively, certain example embodiments may be performed entirely in hardware.

[0130] In certain example embodiments, an apparatus may include circuitry configured to perform any of the processes or functions illustrated in FIGs. 2-9. As used in this application, the term “circuitry” may refer to one or more or all of the following: (a) hardware-only circuitimplementations (such as implementations in only analog and / or digital circuitry), (b) combinations of hardware circuits and software, such as (as applicable): (i) a combination of analog and / or digital hardware circuit(s) with software / firmware and (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions), and (c) hardware circuit(s) and or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (e.g. , firmware) for operation, but the software may not be present when it is not needed for operation. This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.

[0131] FIG. 11 illustrates an example of a 5G network and system architecture according to certain example embodiments. Shown are multiple network functions that may be implemented as software operating as part of a network device or dedicated hardware, as a network device itself or dedicated hardware, or as a virtual function operating as a network device or dedicated hardware. The NE and UE illustrated in FIG. 11 may be similar to NE 1110 and UE 1120, respectively. The user plane function (UPF) may provide services such as intra-RAT and inter- RAT mobility, routing and forwarding of data packets, inspection of packets, user plane quality of service (QoS) processing, buffering of downlink packets, and / or triggering of downlink data notifications. The application function (AF) may primarily interface with the core network to facilitate application usage of traffic routing and interact with the policy framework.

[0132] According to certain example embodiments, processors 1011 and 1021, and memories 1012 and 1022, may be included in or may form a part of processing circuitry or control circuitry. In addition, in some example embodiments, transceivers 1013 and 1023 may be included in or may form a part of transceiving circuitry.

[0133] In some example embodiments, an apparatus e.g., NE 1010 and / or UE 1020) may include means for performing a method, a process, or any of the variants discussed herein. Examples of the means may include one or more processors, memory, controllers,transmitters, receivers, and / or computer program code for causing the performance of the operations.

[0134] In various example embodiments, apparatus 1020 may be controlled by memory 1022 and processor 1021 to receive, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and monitor for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0135] Certain example embodiments may be directed to an apparatus that includes means for performing any of the methods described herein including, for example, means for receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and means for monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

[0136] In various example embodiments, apparatus 1010 may be controlled by memory 1012 and processor 1011 to determine a plurality of control resource sets, CORESETs, for a search space; transmit, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and transmit, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0137] Certain example embodiments may be directed to an apparatus that includes means for performing any of the methods described herein including, for example, means for determining a plurality of control resource sets, CORESETs, for a search space; means for transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and means for transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

[0138] In various example embodiments, apparatus 1020 may be controlled by memory 1022 and processor 1021 to receive, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs; determine, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor; and monitor physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0139] Certain example embodiments may be directed to an apparatus that includes means for performing any of the methods described herein including, for example, means for receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs; determining, based on at least one defined rule or network configuration, at least one CORESET from the plurality of CORESETs on a search space to monitor; and monitoring physical downlink control channel, PDCCH, on the determined at least one CORESET.

[0140] In various example embodiments, apparatus 1010 may be controlled by memory 1012 and processor 1011 to determine a plurality of control resource sets, CORESETs, to be configured for a search space; and transmit, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.

[0141] Certain example embodiments may be directed to an apparatus that includes means for performing any of the methods described herein including, for example, means for determining a plurality of control resource sets, CORESETs, to be configured for a search space; and transmitting, to a user equipment, at least one search space configuration associated with the plurality of determined CORESETs.

[0142] The features, structures, or characteristics of example embodiments described throughout this specification may be combined in any suitable manner in one or more example embodiments. For example, the usage of the phrases “various embodiments,” “certain embodiments,” “some embodiments,” or other similar language throughout this specification refers to the fact that a particular feature, structure, or characteristic described in connection with an example embodiment may be included in at least one example embodiment. Thus, appearances of the phrases “in various embodiments,” “in certain embodiments,” “in some embodiments,” or other similar language throughout this specification does not necessarily all refer to the same group of example embodiments, and the described features, structures, or characteristics may be combined in any suitable manner in one or more example embodiments.

[0143] As used herein, “at least one of the following: ” and “at least one of ” and similar wording, where the list of two or more elements are joined by “and” or “or,” mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.

[0144] Additionally, if desired, the different functions or procedures discussed above may be performed in a different order and / or concurrently with each other. Furthermore, if desired, one or more of the described functions or procedures may be optional or may be combined. As such, the description above should be considered as illustrative of the principles and teachings of certain example embodiments, and not in limitation thereof.

[0145] One having ordinary skill in the art will readily understand that the example embodiments discussed above may be practiced with procedures in a different order, and / or with hardware elements in configurations which are different than those which are disclosed. Therefore, although some embodiments have been described based upon these example embodiments, it would be apparent to those of skill in the art that certain modifications, variations, and alternative constructions would be apparent, while remaining within the spirit and scope of the example embodiments.

[0146] Partial Glossary

[0147] 3GPP 3rdGeneration Partnership Project

[0148] 5G 5thGeneration

[0149] 5GC 5thGeneration Core

[0150] 6G 6thGeneration

[0151] AF Application Function

[0152] ASIC Application Specific Integrated Circuit

[0153] BWP Bandwidth Part

[0154] CBSD Citizens Broadband Radio Service Device

[0155] CE Control Elements

[0156] CORESET Control Resource Set

[0157] CPU Central Processing Unit

[0158] CU Centralized Unit

[0159] DL Downlink

[0160] DMRS Demodulation Reference Signal

[0161] DU Distributed Unit

[0162] eMBB Enhanced Mobile Broadband

[0163] eNB Evolved Node B

[0164] FR Frequency Range

[0165] gNB Next Generation Node B

[0166] GPS Global Positioning System

[0167] HDD Hard Disk Drive

[0168] loT Internet of Things

[0169] LPWA Low Power Wide Area

[0170] LP-WUS Low Power Wake Up Signal

[0171] LTE Long-Term Evolution

[0172] LTE-A Long-Term Evolution Advanced

[0173] MAC Medium Access Control

[0174] MCS Modulation and Coding Scheme

[0175] MEMS Micro Electrical Mechanical System

[0176] MIMO Multiple Input Multiple Output

[0177] mMTC Massive Machine Type Communication

[0178] NE Network Entity

[0179] NG Next Generation

[0180] NG-eNB Next Generation Evolved Node B

[0181] NG-RAN Next Generation Radio Access Network

[0182] NR New Radio

[0183] NW Network

[0184] PBCH Physical Broadcast Channel

[0185] PDA Personal Digital Assistance

[0186] PDCCH Physical Downlink Control Channel

[0187] PDSCH Physical Downlink Shared Channel

[0188] PH Power Headroom

[0189] QoS Quality of Service

[0190] RACH Radom Access Channel

[0191] RAM Random Access Memory

[0192] RAN Radio Access Network

[0193] RAR Radon Access Response

[0194] RAT Radio Access Technology

[0195] RE Resource Element

[0196] RF Radio Frequency

[0197] RO Random Access Channel Occasion

[0198] ROM Read-Only Memory

[0199] RSRP Reference Signal Received Power

[0200] RSRP Reference Signal Received Quality

[0201] RSSI Received Signal Strength Indicator

[0202] SDT Small Data Transmission

[0203] SFN System Frame Number

[0204] SIB System Information Block

[0205] SRS Sounding Reference Signal

[0206] SSB Synchronization Signal Block

[0207] TBS Transport Block Size

[0208] UE User Equipment

[0209] UL Uplink

[0210] UMTS Universal Mobile Telecommunications System

[0211] UPF User Plane Function

[0212] URLLC Ultra-Reliable and Low-Latency Communication

[0213] UTRAN Universal Mobile Telecommunications System Terrestrial RadioAccess Network

[0214] WLAN Wireless Local Area Network

[0215] WUS Wake-Up Signal

Claims

WE CLAIM:

1. An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: receive, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and monitor for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

2. The apparatus of claim 1, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus at least to: receive, from the network entity, the at least one CORESET indication signal associated with the at least one indication signal configuration.

3. The apparatus of claim 1 or 2, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus at least to: monitor, based on the at least one CORESET indication signal, at least one physical downlink control channel, PDCCH, on the indicated one of the plurality of CORESETs associated with a search space.

4. The apparatus of any one of claims 1-3, wherein a number of the plurality of CORESETs is associated with a search space type.

5. The apparatus of any one of claims 1-4, wherein a number of the plurality of CORESETs is associated with at least one downlink control information format configured for a search space of the at least one search space configuration.

6. The apparatus of any one of claims 1-5, wherein the at least one memory andthe instructions, when executed by the at least one processor, further cause the apparatus at least to: monitor one CORESET of the plurality of CORESETs at each search space monitoring occasion.

7. The apparatus of claim 6, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus at least to: receive the at least one CORESET indication signal to monitor a particular CORESET for an upcoming search space occasion.

8. The apparatus of claim 7, wherein the at least one CORESET indication signal comprises a wake-up signal or low-power wake-up signal.

9. The apparatus of any one of claims 1-8, wherein the at least one search space configuration indicates when a CORESET is to be monitored by the apparatus.

10. An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine a plurality of control resource sets, CORESETs, for a search space; transmit, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and transmit, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

11. The apparatus of claim 10, wherein determining the plurality of CORESETs comprises the at least one memory and the instructions, when executed by the at least one processor, further causing the apparatus at least to: determine a number of the plurality of CORESETs to be configured based on at least one physical downlink control channel, PDCCH, performance metric.

12. The apparatus of claim 11 , wherein the at least one PDCCH performance metric comprises at least one of:PDCCH load; blocking issues;PDCCH aggregation level distribution; network load; or supported coverage enhancement levels.

13. The apparatus of any one of claims 10-12, wherein at least one of: two or more of the plurality of CORESETs overlap in at least one of time domain or frequency domain; or at least one CORESET of the plurality of CORESETs is contained within another CORESET.

14. A method comprising: receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

15. A method comprising : determining a plurality of control resource sets, CORESETs, for a search space; transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

16. An apparatus comprising: means for receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and means for monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

17. An apparatus comprising: means for determining a plurality of control resource sets, CORESETs, for a search space; means for transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and means for transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

18. A computer program comprising instructions, which, when executed by an apparatus, cause the apparatus to perform: receiving, from a network entity, at least one search space configuration associated with a plurality of control resource sets, CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and monitoring for at least one CORESET indication signal from the network entity, wherein the at least one CORESET indication signal indicates one of the plurality of CORESETs for the apparatus to monitor.

19. A computer program comprising instructions, which, when executed by an apparatus, cause the apparatus to perform: determining a plurality of control resource sets, CORESETs, for a search space;transmitting, to a user equipment, at least one search space configuration associated with the plurality of CORESETs, wherein the at least one search space configuration comprises at least one indication signal configuration associated with the plurality of CORESETs; and transmitting, to the user equipment, at least one CORESET indication signal associated with the at least one indication signal configuration.

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