Patent Description:
Wireless communication systems, as are for example described in <CIT>, are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.).

Certain aspects of the present disclosure provide a method for wireless communications by a user equipment (UE). The method generally includes detecting a synchronization signal block (SSB), determining a start time of a control resource set (CORESET) associated with the detected SSB, wherein the start time of the CORESET is aligned with a boundary of a symbol having a larger cyclic prefix (CP) than one or more other symbols in a same half-subframe, and monitoring the CORESET for a physical downlink control channel (PDCCH) transmission.

Certain aspects of the present disclosure are directed to an apparatus for wireless communication by a UE. The apparatus generally includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to detect a SSB; determine a start time of a CORESET associated with the detected SSB, wherein the start time of the CORESET is aligned with a boundary of a symbol having a larger CP than one or more other symbols in a same half-subframe; and monitor the CORESET for a PDCCH transmission.

Certain aspects of the present disclosure are directed to an apparatus for wireless communication by a UE. The apparatus generally includes means for detecting a SSB; means for determining a start time of a CORESET associated with the detected SSB, wherein the start time of the CORESET is aligned with a boundary of a symbol having a larger CP than one or more other symbols in a same half-subframe; and means for monitoring the CORESET for a PDCCH transmission.

Certain aspects of the present disclosure are directed to a computer readable medium having instructions stored thereon for detecting a SSB; determining a start time of a CORESET associated with the detected SSB, wherein the start time of the CORESET is aligned with a boundary of a symbol having a larger CP than one or more other symbols in a same half-subframe; and monitoring the CORESET for a PDCCH transmission.

Certain aspects of the present disclosure provide a method for wireless communications by a network entity. The method generally includes transmitting one or more SSBs, determining one or more start times for one or more CORESETs associated with the one or more SSBs, wherein the one or more start times of the one or more CORESETs are aligned with boundaries of orthogonal frequency division multiplexed (OFDM) symbols having larger CPs than one or more other OFDM symbols in a same half-subframe, and transmitting a PDCCH in one or more of the one or more CORESETs.

Certain aspects of the present disclosure are directed to an apparatus for wireless communication by a network entity. The apparatus generally includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to transmit one or more SSBs, determine one or more start times for one or more CORESETs associated with the one or more SSBs, wherein the one or more start times of the one or more CORESETs are aligned with boundaries of OFDM symbols having larger CPs than one or more other OFDM symbols in a same half-subframe, and transmit a PDCCH in one or more of the one or more CORESETs.

Certain aspects of the present disclosure are directed to an apparatus for wireless communication by a network entity. The apparatus generally includes means for transmitting one or more SSBs, means for determining one or more start times for one or more CORESETs associated with the one or more SSBs, wherein the one or more start times of the one or more CORESETs are aligned with boundaries of orthogonal frequency division multiplexed (OFDM) symbols having larger CPs than one or more other OFDM symbols in a same half-subframe, and means for transmitting a PDCCH in one or more of the one or more CORESETs.

Certain aspects of the present disclosure are directed to a computer readable medium having instructions stored thereon for transmitting one or more SSBs, determining one or more start times for one or more CORESETs associated with the one or more SSBs, wherein the one or more start times of the one or more CORESETs are aligned with boundaries of orthogonal frequency division multiplexed (OFDM) symbols having larger CPs than one or more other OFDM symbols in a same half-subframe, and transmitting a PDCCH in one or more of the one or more CORESETs.

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for mitigating timing resolution limitation due to synchronization signal blocks (SSB) with smaller subcarrier spacing (SCS).

As will be described in greater detail below, the techniques may help align CORESETs with symbols that have larger cyclic prefixes (CP) durations, allowing a UE to refine timing adjustment after detecting an SSB.

<FIG> illustrates an example wireless communication network <NUM> (e.g., an NR/<NUM> network), in which aspects of the present disclosure may be performed. For example, the wireless network <NUM> may include a user equipment (UE) <NUM> configured to perform operations <NUM> of <FIG> to determine a start time of CORESET <NUM> after detecting an SSB. Similarly, the wireless network <NUM> may include a base station <NUM> configured to perform operations <NUM> of <FIG> to transmit SSBs and PDCCHs within CORESETs to a UE performing operations <NUM> of <FIG>.

As illustrated in <FIG>, the wireless network <NUM> may include a number of base stations (BSs) <NUM> and other network entities. A BS may be a station that communicates with UEs. Each BS <NUM> may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a coverage area of a NodeB (NB) and/or a NodeB subsystem serving this coverage area, depending on the context in which the term is used. In new radio (NR) systems, the term "cell" and next generation NodeB (gNB), NR base station (NR BS), <NUM> NB, access point (AP), or transmission reception point (TRP) may be interchangeable. In some examples, the base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in wireless communication network <NUM> through various types of backhaul interfaces, such as a direct physical connection, a wireless connection, a virtual network, or the like using any suitable transport network.

A RAT may also be referred to as a radio technology, an air interface, etc. A frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs.

In the example shown in <FIG>, a relay station 110r may communicate with the BS 110a and a UE 120r to facilitate communication between the BS 110a and the UE 120r.

A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE), a cellular phone, a smart phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music device, a video device, a satellite radio, etc.), a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, gaming device, reality augmentation device (augmented reality (AR), extended reality (XR), or virtual reality (VR)), or any other suitable device that is configured to communicate via a wireless or wired medium.

In some scenarios, air interface access may be scheduled. For example, a scheduling entity (e.g., a base station (BS), Node B, eNB, gNB, or the like) can allocate resources for communication among some or all devices and equipment within its service area or cell. That is, for scheduled communication, subordinate entities can utilize resources allocated by one or more scheduling entities.

Turning back to <FIG>, this figure illustrates a variety of potential deployments for various deployment scenarios. For example, in <FIG>, a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink. Other lines show component to component (e.g., UE to UE) communication options.

At the BS 110a, a transmit processor <NUM> may receive data from a data source <NUM> and control information from a controller/processor <NUM>. The transmit processor <NUM> may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), and cell-specific reference signal (CRS). A transmit (TX) multiple-input multiple-output (MIMO) processor <NUM> may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 232a-232t. Downlink signals from modulators 232a-232t may be transmitted via the antennas 234a-234t, respectively.

At the UE 120a, the antennas 252a-252r may receive the downlink signals from the BS 110a and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively. A MIMO detector <NUM> may obtain received symbols from all the demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor <NUM> may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink <NUM>, and provide decoded control information to a controller/processor <NUM>.

On the uplink, at UE 120a, a transmit processor <NUM> may receive and process data (e.g., for the physical uplink shared channel (PUSCH)) from a data source <NUM> and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor <NUM>. The symbols from the transmit processor <NUM> may be precoded by a TX MIMO processor <NUM> if applicable, further processed by the demodulators in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At the BS 110a, the uplink signals from the UE 120a may be received by the antennas <NUM>, processed by the modulators <NUM>, detected by a MIMO detector <NUM> if applicable, and further processed by a receive processor <NUM> to obtain decoded data and control information sent by the UE 120a.

The controller/processor <NUM> and/or other processors and modules at the UE 120a may perform or direct the execution of processes for the techniques described herein. For example, controller/processor <NUM> and/or other processors and modules at the UE 120a may perform (or be used by UE 120a to perform) operations <NUM> of <FIG>. Similarly, the controller/processor <NUM> and/or other processors and modules at the BS 110a may perform or direct the execution of processes for the techniques described herein. For example, controller/processor <NUM> and/or other processors and modules at the BS 110a may perform (or be used by BS 110a to perform) operations <NUM> of <FIG>. Although shown at the controller/processor, other components of the UE 120a or BS 110a may be used to perform the operations described herein.

Embodiments discussed herein may include a variety of spacing and timing deployments. For example, in LTE, the basic transmission time interval (TTI) or packet duration is the <NUM> subframe. A subframe contains a variable number of slots (e.g., <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, slots) depending on the subcarrier spacing.

A mini-slot is a subslot structure (e.g., <NUM>, <NUM>, or <NUM> symbols).

In NR, a synchronization signal (SS) block (SSB) is transmitted. The SSB includes a PSS, a SSS, and a two symbol PBCH. The SSB can be transmitted in a fixed slot location, such as the symbols <NUM>-<NUM> as shown in <FIG>. The PSS may provide half-frame timing, and the SS may provide the CP length and frame timing. The physical broadcast channel (PBCH) carries some basic system information, such as downlink system bandwidth, timing information within radio frame, SS burst set periodicity, system frame number, etc..

As shown in <FIG>, the SS blocks may be organized into SS burst sets to support beam sweeping. As shown, each SSB within a burst set may be transmitted using a different beam, which may help a UE quickly acquire both transmit (Tx) and receive (Rx) beams (particular for mmW applications). A physical cell identity (PCI) may still decoded from the PSS and SSS of the SSB.

Certain deployment scenarios may include one or both NR deployment options. Some may be configured for non-standalone (NSA) and/or standalone (SA) option. A standalone cell may need to broadcast both SSB and remaining minimum system information (RMSI), for example, with SIB <NUM> and SIB2. A non-standalone cell may only need to broadcast SSB, without broadcasting RMSI. In a single carrier in NR, multiple SSBs may be sent in different frequencies, and may include the different types of SSB.

A control resource set (CORESET) for an orthogonal frequency division multiple access (OFDMA) system (e.g., a communications system transmitting physical downlink control channel (PDCCH) using OFDMA waveforms) may comprise one or more control resource (e.g., time and frequency resources) sets, configured for conveying PDCCH, within the system bandwidth. Within each CORESET, one or more search spaces (e.g., common search space (CSS), UE-specific search space (USS), etc.) may be defined for a given user equipment (UE). Search spaces are generally areas or portions where a communication device (e.g., a UE) may look for control information.

According to aspects of the present disclosure, a CORESET is a set of time and frequency domain resources, defined in units of resource element groups (REGs). Each REG may comprise a fixed number (e.g., twelve) tones in one symbol period (e.g., a symbol period of a slot), where one tone in one symbol period is referred to as a resource element (RE). A fixed number of REGs may be included in a control channel element (CCE). Sets of CCEs may be used to transmit new radio PDCCHs (NR-PDCCHs), with different numbers of CCEs in the sets used to transmit NR-PDCCHs using differing aggregation levels. Multiple sets of CCEs may be defined as search spaces for UEs, and thus a NodeB or other base station may transmit an NR-PDCCH to a UE by transmitting the NR-PDCCH in a set of CCEs that is defined as a decoding candidate within a search space for the UE, and the UE may receive the NR-PDCCH by searching in search spaces for the UE and decoding the NR-PDCCH transmitted by the NodeB.

Operating characteristics of a NodeB or other base station in an NR communications system may be dependent on a frequency range (FR) in which the system operates. A frequency range may comprise one or more operating bands (e.g., "n1" band, "n2" band, "n7" band, and "n41" band), and a communications system (e.g., one or more NodeBs and UEs) may operate in one or more operating bands. Frequency ranges and operating bands are described in more detail in "Base Station (BS) radio transmission and reception" TS38. <NUM> (Release <NUM>), which is available from the 3GPP website.

As described above, a CORESET is a set of time and frequency domain resources. The CORESET can be configured for conveying PDCCH within system bandwidth. A UE may determine a CORESET and monitors the CORESET for control channels. During initial access, a UE may identify an initial CORESET (CORESET #<NUM>) configuration from a field (e.g., pdcchConfigSIB1) in a maser information block (MIB). This initial CORESET may then be used to configure the UE (e.g., with other CORESETs and/or bandwidth parts via dedicated (e.g., UE-specific) signaling. When the UE detects a control channel in the CORESET, the UE attempts to decode the control channel and communicates with the transmitting BS (e.g., the transmitting cell) according to the control data provided in the control channel (e.g., transmitted via the CORESET).

According to aspects of the present disclosure, when a UE is connected to a cell (or BS), the UE may receive a master information block (MIB). The MIB can be in a synchronization signal and physical broadcast channel (SS/PBCH) block (e.g., in the PBCH of the SS/PBCH block) on a synchronization raster (sync raster). In some scenarios, the sync raster may correspond to an SSB. From the frequency of the sync raster, the UE may determine an operating band of the cell. Based on a cell's operation band, the UE may determine a minimum channel bandwidth and a subcarrier spacing (SCS) of the channel. The UE may then determine an index from the MIB (e.g., four bits in the MIB, conveying an index in a range <NUM>-<NUM>).

Given this index, the UE may look up or locate a CORESET configuration this initial CORESET configured via the MIB is generally referred to as CORESET #<NUM> or CORESET <NUM>). This may be accomplished from one or more tables of CORESET configurations. These configurations (including single table scenarios) may include various subsets of indices indicating valid CORESET configurations for various combinations of minimum channel bandwidth and SCS. In some arrangements, each combination of minimum channel bandwidth and SCS may be mapped to a subset of indices in the table.

Alternatively or additionally, the UE may select a search space CORESET configuration table from several tables of CORESET configurations. These configurations can be based on a minimum channel bandwidth and SCS. The UE may then look up a CORESET configuration (e.g., a Type0-PDCCH search space CORESET configuration) from the selected table, based on the index. After determining the CORESET configuration (e.g., from the single table or the selected table), the UE may then determine the CORESET to be monitored (as mentioned above) based on the location (in time and frequency) of the SS/PBCH block and the CORESET configuration.

<FIG> shows an exemplary transmission resource mapping <NUM>, according to aspects of the present disclosure. In the exemplary mapping, a BS (e.g., BS 110a, shown in <FIG>) transmits an SS/PBCH block <NUM>. The SS/PBCH block includes a MIB conveying an index to a table that relates the time and frequency resources of the CORESET <NUM> to the time and frequency resources of the SS/PBCH block.

The BS may also transmit control signaling. In some scenarios, the BS may also transmit a PDCCH to a UE (e.g., UE <NUM>, shown in <FIG>) in the (time/frequency resources of the) CORESET. The PDCCH may schedule a PDSCH <NUM>. The BS then transmits the PDSCH to the UE. The UE may receive the MIB in the SS/PBCH block, determine the index, look up a CORESET configuration based on the index, and determine the CORESET from the CORESET configuration and the SS/PBCH block. The UE may then monitor the CORESET, decode the PDCCH in the CORESET, and receive the PDSCH that was allocated by the PDCCH.

Different CORESET configurations may have different parameters that define a corresponding CORESET. For example, each configuration may indicate a number of resource blocks (e.g., <NUM>, <NUM>, or <NUM>), a number of symbols (e.g., <NUM>-<NUM>), as well as an offset (e.g., <NUM>-<NUM> RBs) that indicates a location in frequency.

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for mitigating timing resolution limitation due to synchronization signal blocks (SSB) with smaller subcarrier spacing (SCS). For example, the techniques may help align control resource sets (CORESETs) with symbols that have larger cyclic prefixes (CP) durations, allowing a UE to refine timing adjustment after detecting an SSB.

The techniques presented herein may be applied in various bands utilized for NR. For example, for the higher band referred to as FR4 (e.g., <NUM> - <NUM>), an OFDM waveform with very large subcarrier spacing (<NUM> - <NUM>) is required to combat severe phase noise. Due to the large subcarrier spacing, the slot length tends to be very short. In a lower band referred to as <CIT> GHz to <NUM>) with <NUM> SCS, the slot length is <NUM>, while in FR4 with <NUM>, the slot length is <NUM>. In some cases, a frequency band referred to as FR2x may be used.

In FR2x, it may be desirable to reuse the FR2 SSB (<NUM> SCS) design, as illustrated in <FIG>, which has better link budget and requires much lower searcher complexity. A larger SCS may be required to accommodate higher phase noise associated with FR2x frequency band. Other physical channels (other than SSB) may use larger SCS (<NUM>, <NUM>, <NUM>), as illustrated in <FIG>.

Unfortunately, the larger SCS impacts the timing resolution of SSB which, in some cases, may not be sufficient for CORESET <NUM> (initial CORESET #<NUM>) reception. Timing uncertainty may be comparable, and in some cases larger, than the timing uncertainty due to shorter CP length associated with larger SCS, which may make it difficult to determine the CORESET <NUM> symbol boundary.

Accordingly, certain aspects of the present disclosure provide techniques for mitigating the lower timing resolution associated with <NUM> SCS by taking advantage of the longer CP in certain symbols. If longer CP symbols are not available, the only solution may be to apply multiple timing hypotheses when determining symbol boundary.

For example, as illustrated in <FIG>, in the FR2x waveform design, the first few OFDM symbols of every <NUM> (half subframe) may have a significantly longer CP than the other OFDM symbols. The longer CP of these first few symbols at every half-SF may allow some extra margin for timing ambiguity in detecting symbol boundary. Further, if these first few symbols contain RS (reference symbols), they can be used to refine timing estimate for the signal with larger SCS.

<FIG> and <FIG> illustrate example operations that may be performed by a UE and network entity, respectively, for mitigating timing resolution limitations due to SSBs with low SCSs, in accordance with aspects of the present disclosure.

<FIG> illustrates example operations <NUM> for wireless communications by a UE, in accordance with certain aspects of the present disclosure. For example, operations <NUM> may be performed by a UE <NUM> of <FIG> to mitigate timing resolution limitations when detecting a CORESET (e.g., CORESET <NUM>) boundary.

Operations <NUM> begin, at <NUM>, by detecting a synchronization signal block (SSB). At <NUM>, the UE determines a start time of a CORESET associated with the detected SSB, where the start time of the CORESET is aligned with a boundary of a symbol having a larger CP than one or more other symbols in a same half-subframe. At <NUM>, the UE monitors the CORESET for a physical downlink control channel (PDCCH) transmission.

<FIG> illustrates example operations <NUM> for wireless communications by a network entity and may be considered complementary to operations <NUM> of <FIG>. For example, operations <NUM> may be performed by a gNB to send a PDCCH in a CORESET aligned with a symbol boundary, to a UE performing operations <NUM>.

Operations <NUM> begin, at <NUM>, by transmitting one or more synchronization signal blocks (SSBs). At <NUM>, the network entity determines one or more start times for one or more CORESETs associated with the one or more SSBs, wherein the one or more start times of the one or more CORESETs are aligned with boundaries of orthogonal frequency division multiplexed (OFDM) symbols having larger CPs than one or more other OFDM symbols in a same half-subframe. At <NUM>, the network entity transmits a PDCCH in one or more of the one or more CORESETs.

According to one approach, the start time of the CORESET (e.g., CORESET <NUM>) to be aligned with the beginning of a half-subframe (<NUM>) boundary. In this manner, CORESET <NUM> symbols may have a longer CP that can be used to handle the timing ambiguity due to limited SSB timing resolution. In some cases, the DMRS of a PDCCH (sent in CORESET <NUM>) can be used by the UE to refine symbol timing estimate.

There may still be some limitations to this approach. For example, due to this limitation, the periodicity of CORESET <NUM> may not be smaller than (<NUM> x N_beams). In case of a <NUM> beam configuration, this would mean the periodicity is at least <NUM>.

According to another approach, excess CP duration may be distributed among first few symbols of certain time windows occurring periodically. For example, as illustrated in <FIG>, for excess the excess CP duration may be spread among the first OFDM symbol of time windows occurring every <NUM>/<NUM>n ms.

This approach may help reduce the CORESET <NUM> periodicity, allowing the CORESET <NUM> periodicity to be (<NUM>/<NUM>nx Nbeams). As an example, when n=<NUM>, the periodicity can be reduced (from the <NUM> example above) to <NUM> (e.g., within a single radio frame). This may mean, however, that the symbol-level alignment between larger SCSs (e.g., <NUM> and above) for FR2x waveforms and smaller SCS (e.g., <NUM>) for FR2 waveforms may not be maintained. Nevertheless, the reduction in CORESET0 flexibility may be worth the tradeoff.

As proposed herein, aligning the start of a CORESET with symbols having a longer CP may help a UE handle the timing ambiguity that might be created due to limited SSB timing resolution.

The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium/memory <NUM> via a bus <NUM>. In certain aspects, the computer-readable medium/memory <NUM> is configured to store instructions (e.g., computer-executable code) that when executed by the processor <NUM>, cause the processor <NUM> to perform the operations illustrated in <FIG>, or other operations for performing the various techniques discussed herein. In certain aspects, computer-readable medium/memory <NUM> stores code <NUM> for detecting; code <NUM> for determining; code <NUM> for monitoring; and code <NUM> for refining.

In certain aspects, the code <NUM> for detecting includes code for detecting a synchronization signal block (SSB).

In certain aspects, the code <NUM> for determining includes code for determining a start time of a control resource set (CORESET) associated with the detected SSB, wherein the start time of the CORESET is aligned with a boundary of a symbol having a larger cyclic prefix (CP) than one or more other symbols in a same half-subframe.

In certain aspects, the code <NUM> for monitoring includes code for monitoring the CORESET for a physical downlink control channel (PDCCH) transmission.

In certain aspects, the code <NUM> for refining includes code for refining a symbol timing estimate based on a demodulation reference signal (DMRS) transmitted with the PDCCH.

In certain aspects, the processor <NUM> has circuitry configured to implement the code stored in the computer-readable medium/memory <NUM>. The processor <NUM> includes circuitry <NUM> for detecting; circuitry <NUM> for determining; circuitry <NUM> for monitoring; and circuitry <NUM> for refining.

In certain aspects, the circuitry <NUM> for detecting includes circuitry for detecting a SSB.

In certain aspects, the circuitry <NUM> for determining includes circuitry for determining a start time of a CORESET associated with the detected SSB, wherein the start time of the CORESET is aligned with a boundary of a symbol having a larger CP than one or more other symbols in a same half-subframe.

In certain aspects, the circuitry <NUM> for monitoring includes circuitry for monitoring the CORESET for a PDCCH transmission.

In certain aspects, the circuitry <NUM> for refining includes code for refining a symbol timing estimate based on a DMRS transmitted with the PDCCH.

The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium/memory <NUM> via a bus <NUM>. In certain aspects, the computer-readable medium/memory <NUM> is configured to store instructions (e.g., computer-executable code) that when executed by the processor <NUM>, cause the processor <NUM> to perform the operations illustrated in <FIG>, or other operations for performing the various techniques discussed herein. In certain aspects, computer-readable medium/memory <NUM> stores: code <NUM> for transmitting; and code <NUM> for determining.

In certain aspects, the code <NUM> for transmitting includes code for transmitting one or more SSBs; and code for transmitting a PDCCH in one or more of the one or more CORESETs.

In certain aspects, the code <NUM> for determining includes code for determining one or more start times for one or more CORESETs associated with the one or more SSBs, wherein the one or more start times of the one or more CORESETs are aligned with boundaries of orthogonal frequency division multiplexed (OFDM) symbols having larger CPs than one or more other OFDM symbols in a same half-subframe.

In certain aspects, the processor <NUM> has circuitry configured to implement the code stored in the computer-readable medium/memory <NUM>. The processor <NUM> includes circuitry <NUM> for transmitting; and circuitry <NUM> for determining.

In certain aspects, the circuitry <NUM> for transmitting includes circuitry for transmitting one or more SSBs; and code for transmitting a PDCCH in one or more of the one or more CORESETs.

In certain aspects, the circuitry <NUM> for determining includes circuitry for determining one or more start times for one or more CORESETs associated with the one or more SSBs, wherein the one or more start times of the one or more CORESETs are aligned with boundaries of OFDM symbols having larger CPs than one or more other OFDM symbols in a same half-subframe.

For example, processors controller/processor <NUM> of the UE <NUM><NUM> may be configured to perform operations <NUM> of <FIG>, while controller/processor <NUM> of the BS <NUM> shown in <FIG> may be configured to perform operations <NUM> of <FIG>.

Means for receiving may include a receiver (such as one or more antennas or receive processors) illustrated in <FIG>. Means for transmitting may include a transmitter (such as one or more antennas or transmit processors) illustrated in <FIG>. Means for determining, means for processing, means for treating, and means for applying may include a processing system, which may include one or more processors of the UE <NUM> and/or one or more processors of the BS <NUM> shown in <FIG>.

In some cases, rather than actually transmitting a frame a device may have an interface to output a frame for transmission (a means for outputting). For example, a processor may output a frame, via a bus interface, to a radio frequency (RF) front end for transmission. Similarly, rather than actually receiving a frame, a device may have an interface to obtain a frame received from another device (a means for obtaining). For example, a processor may obtain (or receive) a frame, via a bus interface, from an RF front end for reception.

In the case of a UE <NUM> (see <FIG>), a user interface (e.g., keypad, display, mouse, joystick, etc.) may also be connected to the bus.

Claim 1:
A method for wireless communication by a user-equipment, UE (<NUM>), comprising:
detecting (<NUM>) a synchronization signal block, SSB;
determining (<NUM>) a start time of a control resource set, CORESET (<NUM>),
associated with the detected SSB, wherein the start time of the CORESET (<NUM>) is aligned with a boundary of a symbol having a larger cyclic prefix, CP, than one or more other symbols in a same half-subframe; and
monitoring (<NUM>) the CORESET (<NUM>) for a physical downlink control channel, PDCCH, transmission.