Patent Publication Number: US-2022217683-A1

Title: Blind detection and cce allocation for carrier aggregation

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation of U.S. patent application Ser. No. 16/916,270, entitled “BLIND DETECTION AND CCE ALLOCATION FOR CARRIER AGGREGATION” and filed on Jun. 30, 2020, which claims the benefits of U.S. Provisional Application Ser. No. 62/880,132, entitled “METHOD SUPPORTING MULTIPLE TRP TRANSMISSION AND CARRIER AGGREGATION” and filed on Jul. 30, 2019; U.S. Provisional Application Ser. No. 62/888,062, entitled “ENHANCEMENTS ON MULTI-TRP/PANEL TRANSMISSION” and filed on Aug. 16, 2019; and U.S. Provisional Application Ser. No. 62/893,231, entitled “ENHANCEMENTS ON MULTI-TRP/PANEL TRANSMISSION” and filed on Aug. 29, 2019; all of which are expressly incorporated by reference herein in their entirety. 
    
    
     BACKGROUND 
     Field 
     The present disclosure relates generally to communication systems, and more particularly, to techniques of allocating blind detections/CCEs on certain component carriers at a UE for monitoring a single physical down link control channel (PDCCH) from a TRP and on other component carriers for monitoring multiple PDCCHs from multiple transmission and reception points (TRPs). 
     Background 
     The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. 
     Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems. 
     These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. 
     SUMMARY 
     The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. 
     In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE determines N1 component carriers on each of which the UE is configured to detect a respective one physical down link control channel (PDCCH) in a slot. N1 is a positive integer. The UE determines N2 component carriers on each of which the UE is configured to detect respective at least two PDCCHs in the slot. N2 is a positive integer. The UE determines a total Q blind detections of PDCCH that the UE is capable of performing. Q is a positive integer. The UE determines a first predetermined scaling factor X. X is a positive number. The UE allocates M1 blind detections of the Q blind detections to be available on each of the N1 component carriers and M2 blind detections of the Q blind detections to be available on each of the N2 component carriers such that (N1*M1+N2*M2) is a largest integer no greater than Q. M1 is a positive integer. M2 is a positive integer and equal to X*M1. The UE performs blind detections in accordance with the allocations. 
     To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram illustrating an example of a wireless communications system and an access network. 
         FIG. 2  is a diagram illustrating a base station in communication with a UE in an access network. 
         FIG. 3  illustrates an example logical architecture of a distributed access network. 
         FIG. 4  illustrates an example physical architecture of a distributed access network. 
         FIG. 5  is a diagram showing an example of a DL-centric subframe. 
         FIG. 6  is a diagram showing an example of an UL-centric subframe. 
         FIG. 7  is a diagram illustrating communication between a UE and multiple TRPs. 
         FIG. 8  is a diagram illustrating monitoring PDCCHs by a UE. 
         FIG. 9  is a flow chart a method (process) for performing PDCCH monitoring. 
         FIG. 10  is a conceptual data flow diagram illustrating the data flow between different components/means in an exemplary apparatus. 
         FIG. 11  is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system. 
     
    
    
     DETAILED DESCRIPTION 
     The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts. 
     Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements”). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. 
     By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoC), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. 
     Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer. 
       FIG. 1  is a diagram illustrating an example of a wireless communications system and an access network  100 . The wireless communications system (also referred to as a wireless wide area network (WWAN)) includes base stations  102 , UEs  104 , and a core network  160 . The base stations  102  may include macro cells (high power cellular base station) and/or small cells (low power cellular base station). The macro cells include base stations. The small cells include femtocells, picocells, and microcells. 
     The base stations  102  (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) interface with the core network  160  through backhaul links  132  (e.g., S1 interface). In addition to other functions, the base stations  102  may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations  102  may communicate directly or indirectly (e.g., through the core network  160 ) with each other over backhaul links  134  (e.g., X2 interface). The backhaul links  134  may be wired or wireless. 
     The base stations  102  may wirelessly communicate with the UEs  104 . Each of the base stations  102  may provide communication coverage for a respective geographic coverage area  110 . There may be overlapping geographic coverage areas  1   10 . For example, the small cell  102 ′ may have a coverage area  110 ′ that overlaps the coverage area  1   10  of one or more macro base stations  102 . A network that includes both small cell and macro cells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG). The communication links  120  between the base stations  102  and the UEs  104  may include uplink (UL) (also referred to as reverse link) transmissions from a UE  104  to a base station  102  and/or downlink (DL) (also referred to as forward link) transmissions from a base station  102  to a UE  104 . The communication links  120  may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity. The communication links may be through one or more carriers. The base stations  102 /UEs  104  may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100 MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or less carriers may be allocated for DL than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell). 
     The wireless communications system may further include a Wi-Fi access point (AP)  150  in communication with Wi-Fi stations (STAs)  152  via communication links  154  in a 5 GHz unlicensed frequency spectrum. When communicating in an unlicensed frequency spectrum, the STAs  152 /AP  150  may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available. 
     The small cell  102 ′ may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell  102 ′ may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP  150 . The small cell  102 ′, employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network. 
     The gNodeB (gNB)  180  may operate in millimeter wave (mmW) frequencies and/or near mmW frequencies in communication with the UE  104 . When the gNB  180  operates in mmW or near mmW frequencies, the gNB  180  may be referred to as an mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW/near mmW radio frequency band has extremely high path loss and a short range. The mmW base station gNB  180  may utilize beamforming  184  with the UE  104  to compensate for the extremely high path loss and short range. 
     The core network  160  may include a Mobility Management Entity (MME)  162 , other MMEs  164 , a Serving Gateway  166 , a Multimedia Broadcast Multicast Service (MBMS) Gateway  168 , a Broadcast Multicast Service Center (BM-SC)  170 , and a Packet Data Network (PDN) Gateway  172 . The MME  162  may be in communication with a Home Subscriber Server (HSS)  174 . The MME  162  is the control node that processes the signaling between the UEs  104  and the core network  160 . Generally, the MME  162  provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway  166 , which itself is connected to the PDN Gateway  172 . The PDN Gateway  172  provides UE IP address allocation as well as other functions. The PDN Gateway  172  and the BM-SC  170  are connected to PDNs  176 . The PDNs  176  may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service (PSS), and/or other IP services. The BM-SC  170  may provide functions for MBMS user service provisioning and delivery. The BM-SC  170  may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway  168  may be used to distribute MBMS traffic to the base stations  102  belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information. 
     The base station may also be referred to as a gNB, Node B, evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), or some other suitable terminology. The base station  102  provides an access point to the core network  160  for a UE  104 . Examples of UEs  104  include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a toaster, or any other similar functioning device. Some of the UEs  104  may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, etc.). The UE  104  may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. 
       FIG. 2  is a block diagram of a base station  210  in communication with a UE  250  in an access network. In the DL, IP packets from the core network  160  may be provided to a controller/processor  275 . The controller/processor  275  implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller/processor  275  provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression/decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization. 
     The transmit (TX) processor  216  and the receive (RX) processor  270  implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing. The TX processor  216  handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator  274  may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE  250 . Each spatial stream may then be provided to a different antenna  220  via a separate transmitter  218 TX. Each transmitter  218 TX may modulate an RF carrier with a respective spatial stream for transmission. 
     At the UE  250 , each receiver  254 RX receives a signal through its respective antenna  252 . Each receiver  254 RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor  256 . The TX processor  268  and the RX processor  256  implement layer 1 functionality associated with various signal processing functions. The RX processor  256  may perform spatial processing on the information to recover any spatial streams destined for the UE  250 . If multiple spatial streams are destined for the UE  250 , they may be combined by the RX processor  256  into a single OFDM symbol stream. The RX processor  256  then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT). The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station  210 . These soft decisions may be based on channel estimates computed by the channel estimator  258 . The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station  210  on the physical channel. The data and control signals are then provided to the controller/processor  259 , which implements layer 3 and layer 2 functionality. 
     The controller/processor  259  can be associated with a memory  260  that stores program codes and data. The memory  260  may be referred to as a computer-readable medium. In the UL, the controller/processor  259  provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the core network  160 . The controller/processor  259  is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations. 
     Similar to the functionality described in connection with the DL transmission by the base station  210 , the controller/processor  259  provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression/decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization. 
     Channel estimates derived by a channel estimator  258  from a reference signal or feedback transmitted by the base station  210  may be used by the TX processor  268  to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor  268  may be provided to different antenna  252  via separate transmitters  254 TX. Each transmitter  254 TX may modulate an RF carrier with a respective spatial stream for transmission. The UL transmission is processed at the base station  210  in a manner similar to that described in connection with the receiver function at the UE  250 . Each receiver  218 RX receives a signal through its respective antenna  220 . Each receiver  218 RX recovers information modulated onto an RF carrier and provides the information to a RX processor  270 . 
     The controller/processor  275  can be associated with a memory  276  that stores program codes and data. The memory  276  may be referred to as a computer-readable medium. In the UL, the controller/processor  275  provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE  250 . IP packets from the controller/processor  275  may be provided to the core network  160 . The controller/processor  275  is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations. 
     New radio (NR) may refer to radios configured to operate according to a new air interface (e.g., other than Orthogonal Frequency Divisional Multiple Access (OFDMA)-based air interfaces) or fixed transport layer (e.g., other than Internet Protocol (IP)). NR may utilize OFDM with a cyclic prefix (CP) on the uplink and downlink and may include support for half-duplex operation using time division duplexing (TDD). NR may include Enhanced Mobile Broadband (eMBB) service targeting wide bandwidth (e.g. 80 MHz beyond), millimeter wave (mmW) targeting high carrier frequency (e.g. 60 GHz), massive MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low latency communications (URLLC) service. 
     A single component carrier bandwidth of 100 MHZ may be supported. In one example, NR resource blocks (RBs) may span 12 sub-carriers with a sub-carrier bandwidth of 60 kHz over a 0.125 ms duration or a bandwidth of 15 kHz over a 0.5 ms duration. Each radio frame may consist of 20 or 80 subframes (or NR slots) with a length of 10 ms. Each subframe may indicate a link direction (i.e., DL or UL) for data transmission and the link direction for each subframe may be dynamically switched. Each subframe may include DL/UL data as well as DL/UL control data. UL and DL subframes for NR may be as described in more detail below with respect to  FIGS. 5 and 6 . 
     The NR RAN may include a central unit (CU) and distributed units (DUs). A NR BS (e.g., gNB, 5G Node B, Node B, transmission reception point (TRP), access point (AP)) may correspond to one or multiple BSs. NR cells can be configured as access cells (ACells) or data only cells (DCells). For example, the RAN (e.g., a central unit or distributed unit) can configure the cells. DCells may be cells used for carrier aggregation or dual connectivity and may not be used for initial access, cell selection/reselection, or handover. In some cases DCells may not transmit synchronization signals (SS) in some cases DCells may transmit SS. NR BSs may transmit downlink signals to UEs indicating the cell type. Based on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine NR BSs to consider for cell selection, access, handover, and/or measurement based on the indicated cell type. 
       FIG. 3  illustrates an example logical architecture of a distributed RAN  300 , according to aspects of the present disclosure. A 5G access node  306  may include an access node controller (ANC)  302 . The ANC may be a central unit (CU) of the distributed RAN. The backhaul interface to the next generation core network (NG-CN)  304  may terminate at the ANC. The backhaul interface to neighboring next generation access nodes (NG-ANs)  310  may terminate at the ANC. The ANC may include one or more TRPs  308  (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, or some other term). As described above, a TRP may be used interchangeably with “cell.” 
     The TRPs  308  may be a distributed unit (DU). The TRPs may be connected to one ANC (ANC  302 ) or more than one ANC (not illustrated). For example, for RAN sharing, radio as a service (RaaS), and service specific ANC deployments, the TRP may be connected to more than one ANC. A TRP may include one or more antenna ports. The TRPs may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE. 
     The local architecture of the distributed RAN  300  may be used to illustrate fronthaul definition. The architecture may be defined that support fronthauling solutions across different deployment types. For example, the architecture may be based on transmit network capabilities (e.g., bandwidth, latency, and/or jitter). The architecture may share features and/or components with LTE. According to aspects, the next generation AN (NG-AN)  310  may support dual connectivity with NR. The NG-AN may share a common fronthaul for LTE and NR. 
     The architecture may enable cooperation between and among TRPs  308 . For example, cooperation may be preset within a TRP and/or across TRPs via the ANC  302 . According to aspects, no inter-TRP interface may be needed/present. 
     According to aspects, a dynamic configuration of split logical functions may be present within the architecture of the distributed RAN  300 . The PDCP, RLC, MAC protocol may be adaptably placed at the ANC or TRP. 
       FIG. 4  illustrates an example physical architecture of a distributed RAN  400 , according to aspects of the present disclosure. A centralized core network unit (C-CU)  402  may host core network functions. The C-CU may be centrally deployed. C-CU functionality may be offloaded (e.g., to advanced wireless services (AWS)), in an effort to handle peak capacity. A centralized RAN unit (C-RU)  404  may host one or more ANC functions. Optionally, the C-RU may host core network functions locally. The C-RU may have distributed deployment. The C-RU may be closer to the network edge. A distributed unit (DU)  406  may host one or more TRPs. The DU may be located at edges of the network with radio frequency (RF) functionality. 
       FIG. 5  is a diagram  500  showing an example of a DL-centric subframe. The DL-centric subframe may include a control portion  502 . The control portion  502  may exist in the initial or beginning portion of the DL-centric subframe. The control portion  502  may include various scheduling information and/or control information corresponding to various portions of the DL-centric subframe. In some configurations, the control portion  502  may be a physical DL control channel (PDCCH), as indicated in  FIG. 5 . The DL-centric subframe may also include a DL data portion  504 . The DL data portion  504  may sometimes be referred to as the payload of the DL-centric subframe. The DL data portion  504  may include the communication resources utilized to communicate DL data from the scheduling entity (e.g., UE or BS) to the subordinate entity (e.g., UE). In some configurations, the DL data portion  504  may be a physical DL shared channel (PDSCH). 
     The DL-centric subframe may also include a common UL portion  506 . The common UL portion  506  may sometimes be referred to as an UL burst, a common UL burst, and/or various other suitable terms. The common UL portion  506  may include feedback information corresponding to various other portions of the DL-centric subframe. For example, the common UL portion  506  may include feedback information corresponding to the control portion  502 . Non-limiting examples of feedback information may include an ACK signal, a NACK signal, a HARQ indicator, and/or various other suitable types of information. The common UL portion  506  may include additional or alternative information, such as information pertaining to random access channel (RACH) procedures, scheduling requests (SRs), and various other suitable types of information. 
     As illustrated in  FIG. 5 , the end of the DL data portion  504  may be separated in time from the beginning of the common UL portion  506 . This time separation may sometimes be referred to as a gap, a guard period, a guard interval, and/or various other suitable terms. This separation provides time for the switch-over from DL communication (e.g., reception operation by the subordinate entity (e.g., UE)) to UL communication (e.g., transmission by the subordinate entity (e.g., UE)). One of ordinary skill in the art will understand that the foregoing is merely one example of a DL-centric subframe and alternative structures having similar features may exist without necessarily deviating from the aspects described herein. 
       FIG. 6  is a diagram  600  showing an example of an UL-centric subframe. The UL-centric subframe may include a control portion  602 . The control portion  602  may exist in the initial or beginning portion of the UL-centric subframe. The control portion  602  in  FIG. 6  may be similar to the control portion  502  described above with reference to  FIG. 5 . The UL-centric subframe may also include an UL data portion  604 . The UL data portion  604  may sometimes be referred to as the pay load of the UL-centric subframe. The UL portion may refer to the communication resources utilized to communicate UL data from the subordinate entity (e.g., UE) to the scheduling entity (e.g., UE or BS). In some configurations, the control portion  602  may be a physical DL control channel (PDCCH). 
     As illustrated in  FIG. 6 , the end of the control portion  602  may be separated in time from the beginning of the UL data portion  604 . This time separation may sometimes be referred to as a gap, guard period, guard interval, and/or various other suitable terms. This separation provides time for the switch-over from DL communication (e.g., reception operation by the scheduling entity) to UL communication (e.g., transmission by the scheduling entity). The UL-centric subframe may also include a common UL portion  606 . The common UL portion  606  in  FIG. 6  may be similar to the common UL portion  506  described above with reference to  FIG. 5 . The common UL portion  606  may additionally or alternatively include information pertaining to channel quality indicator (CQI), sounding reference signals (SRSs), and various other suitable types of information. One of ordinary skill in the art will understand that the foregoing is merely one example of an UL-centric subframe and alternative structures having similar features may exist without necessarily deviating from the aspects described herein. 
     In some circumstances, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications. Generally, a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS), even though the scheduling entity may be utilized for scheduling and/or control purposes. In some examples, the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum). 
     In the present disclosure, one or more terms or features are defined or described in “3GPP TS 38.213 V15.6.0 (2019-06) Technical Specification; 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control; (Release 15)” (3GPP TS 38.213), which is expressly incorporated by reference herein in its entirety. Those terms and features are known by a person having ordinary skill in the art. 
       FIG. 7  is a diagram  700  illustrating communication between a UE  704  and multiple TRPs. The UE  704  is configured to communicate signaling and data with multiple transmission and reception points (TRPs), concurrently. In particular, the UE  704  can receive respective PDCCHs from the multiple TRPs, concurrently. In this example, only a TRP-A  702  and a TRP-B  703  are shown in  FIG. 7 , and the other TRPs are not shown. 
     In this example, the UE  704  supports multiple-PDCCH based multiple-TRP/panel transmission. The TRP-A  702  may transmit, on a carrier  707 , DCI  722  (e.g., in a PDCCH) and data  732  (e.g., in a PDSCH), and the TRP-B  703  may transmit, on a carrier  709 , DCI  724  (e.g., in a PDCCH) and data  734  (e.g., in a PDSCH), simultaneously to the UE  704 . The UE  704  and the TRP-A  702  also established uplink channel(s)  772  on the carrier  707 ; the UE  704  and the TRP-B  703  also established uplink channel(s)  774  on the carrier  709 . 
     The carrier  707  and the carrier  709  may overlap in time and frequency domains. The TRP-A  702  and the TRP-B  703  may communicate control and data signals with the UE  704  on the same resource grid. The TRP-A  702  and the TRP-B  703  each may be located at a different base station. 
     In this example, the UE  704  may be configured to monitor PDCCHs from only the TRP-A  702  (or the TRP-B  703 ) on a number of component carriers and to monitor PDCCHs from both the TRP-A  702  and the TRP-B  703  on a number of other component carriers shared by the TRP-A  702  and the TRP-B  703 . 
     The UE has limited capability to perform blind detections to obtain PDCCHs carried on the component carriers. The UE  704  may send a capability indication  752  to the TRP-A  702  on the uplink channel(s)  772  and/or to the TRP-B  703  on the uplink channel(s)  774 . The capability indication  752  indicates the capability of the UE  704  for performing blind detections and the number of Control-Channel Elements (CCEs), on the component carriers, at which the blind detections are performed. 
     From the perspective of the UE  704 , it is not preferred to significantly increase the number of blind detections and the number of CCEs to be monitored for multi-PDCCH based multi-TRP transmission. 
     In one technique, processing-power allocated for another component carrier may be moved to handle multi-PDCCH processing of a given component carrier, under the constraint that the total number of blind detections/CCEs that a UE can use is fixed and independent of M-TRP operation. For example, a UE capable of supporting single-TRP for two component carriers may be also capable of supporting multi-TRPs for only one component carrier. In this regard, RRC configurations per component carrier may be introduced to indicate support for single-DCI based or multi-DCI multi-TRP transmissions. Rules for determining the maximum number of blind detections/CCEs can be used in each component carrier with or without supporting multi-TRP transmissions. 
     For example, based on the capability indication  752  received from the UE  704 , the network can configure the maximum number of blind detections/CCEs for the UE  704 . The TRP-A  702  may send configurations  712  and/or the TRP-B  703  may send configurations  714  to the UE  704  to indicate the maximum blind detections/CCEs configured for the UE  704 . 
     The UE  704  may distribute the available maximum blind detections/CCEs across component carrier and TRP domains. In one possible approach, the maximum number of monitored PDCCH candidates per slot for a downlink bandwidth part supporting two-DCI based PDSCH transmission can be set to be about twice the maximum number for a downlink bandwidth part supporting only single-DCI based PDSCH transmission. For example, when SCS is 15 KHz, a predefined maximum number of blind detections (BDs) per CC may be 44. This maximum number may be increased by a scaling factor of two to 88 for the M-DCI case. The predefined maximum number is applicable for a UE that can provide sufficient processing power for PDCCH monitoring and decoding. The scaling factor used to increase the maximum number of BDs or CCEs for monitoring can be set via RRC configuration. Whether the maximum number of monitored PDCCH candidates per slot for an M-DCI based component carrier (CC) should be doubled can be changed or configured. The total maximum number of blind detections/CCEs across component carriers can be derived by legacy capability signaling mechanism (e.g., by the IE pdcch-BlindDetectionCA if UE supports carrier aggregation with more than 4 downlink component carriers, or by the maximum number of blind detections/CCEs per CC multiplied by the number of supported component carriers for a UE that supports no more than 4 downlink component carriers). If a UE cannot meet the requirement of PDCCH processing power corresponding to the predefined maximum number of BD/CCEs for PDCCH monitoring and decoding, the UE may distribute the available maximum blind detections/CCEs across component carrier and TRP domains. 
     Accordingly, the UE  704  may be configured for operation of two-DCI reception per component carrier. The UE  704  may be configured for operation of single-DCI reception with PDCCH supporting indication of more than one TCI-states per component carrier. The UE  704  may be configured with a capability of a maximum number of component carriers supporting two-DCI reception. 
     From network&#39;s perspective, after obtaining the capability reporting from the UE  704  (e.g., through the capability indication  752 ), the network can configure multiple component carriers, on which multi-TRP transmission may or may not be supported. The network can learn all combinations of (number of single-DCI component carriers, number of multi-DCI component carriers) that can be configured for the UE. The network can configure UE to enable single-DCI operation a candidate component carrier based on UE&#39;s capability reporting on the maximum number of component carriers supporting single-DCI reception with PDCCH supporting indication of more than one TCI-states. Similarly, the network can configure UE to enable multi-DCI operation for a candidate component carrier based on UE&#39;s capability reporting on the maximum number of component carriers supporting multi-DCI reception. According to the UE&#39;s capability for PDCCH BD/CCE numbers and the number of CCs configured for S-DCI and M-DCI operations, if the capability for PDCCH BD/CCE numbers are not sufficient to allow applying the predefined maximum number of monitored PDCCH candidates per slot in each CC (e.g., the numbers  44  and  88  in previous example for cases with the SCS is 15 KHz), then the UE&#39;s capability for PDCCH BD/CCE numbers can be distributed in both component carrier and TRP domain. 
     In this technique, the number of component carriers on which the UE  704  is configured to monitor a single PDCCH with subcarrier spacing (SCS) μ is N cells   DL,1-DCI,μ ; the number of component carriers on which the UE  704  is configured to monitor a single PDCCH with subcarrier spacing (SCS) μ is N cells   DL,2-DCI,μ . 
     The UE  704  may report, e.g., through RRC signaling, a parameter pdcch-BlindDetectionCA in the capability indication  752 . The pdcch-BlindDetectionCA has a value of N cells   cap , which implies the total number of blind detections/CCEs that can be handled by the UE  704  for situations when the total number of configured downlink component carriers is more than 4. 
     The capability indication  752  may also include a N cells   DL,cap,2-DCI  indicating the maximum number of component carriers supporting 2-DCI. N cells   DL,cap,2-DCI  is greater than N cells   DL,2-DCI,μ . As described infra, the number of blind detections/CCEs allocated to a component carrier CC with 2-DCI-enabled is increased by a scaling factor, compared with the number of blind detections/CCEs allocated to a component carrier CC with 1-DCI-enabled. 
     More specifically, the max number of blind detections for a component carrier with m-DCI-enabled is scaled by f(m). The max number of CCEs for a component carrier with m-DCI-enabled is scaled by g(m). The maximum total number of BD and non-overlapped CCE for all configured CCs with m-DCI (m=1 or 2) are given by 
     
       
         
           
             
               
                 
                   f 
                   ⁡ 
                   
                     ( 
                     m 
                     ) 
                   
                 
                 · 
                 
                   N 
                   cells 
                   cap 
                 
                 · 
                 
                   N 
                   cells 
                   
                     DL 
                     , 
                     
                       m 
                       ⁢ 
                       
                         - 
                       
                       ⁢ 
                       DCI 
                     
                     , 
                     μ 
                   
                 
                 · 
                 
                   M 
                   PDCCH 
                   
                     max 
                     , 
                     slot 
                     , 
                     μ 
                   
                 
               
               
                 ( 
                 
                   
                     
                       f 
                       ⁡ 
                       
                         ( 
                         1 
                         ) 
                       
                     
                     ⁢ 
                     
                       Σ 
                       μ 
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           1 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                   + 
                   
                     
                       
                         f 
                         ⁡ 
                         
                           ( 
                           2 
                           ) 
                         
                       
                       · 
                       
                         Σ 
                         μ 
                       
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           2 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                 
                 ) 
               
             
             ⁢ 
             
                 
             
             ⁢ 
             and 
             ⁢ 
             
                 
             
             ⁢ 
             
               
                 
                   
                     g 
                     ⁡ 
                     
                       ( 
                       m 
                       ) 
                     
                   
                   · 
                   
                     N 
                     cells 
                     cap 
                   
                   · 
                   
                     N 
                     cells 
                     
                       DL 
                       , 
                       
                         m 
                         ⁢ 
                         
                           - 
                         
                         ⁢ 
                         DCI 
                       
                       , 
                       μ 
                     
                   
                   · 
                   
                     C 
                     PDCCH 
                     
                       max 
                       , 
                       slot 
                       , 
                       μ 
                     
                   
                 
                 
                   ( 
                   
                     
                       
                         g 
                         ⁡ 
                         
                           ( 
                           1 
                           ) 
                         
                       
                       ⁢ 
                       
                         Σ 
                         μ 
                       
                       ⁢ 
                       
                         N 
                         cells 
                         
                           DL 
                           , 
                           
                             1 
                             ⁢ 
                             
                               - 
                             
                             ⁢ 
                             DCI 
                           
                           , 
                           μ 
                         
                       
                     
                     + 
                     
                       
                         
                           g 
                           ⁡ 
                           
                             ( 
                             2 
                             ) 
                           
                         
                         · 
                         
                           Σ 
                           μ 
                         
                       
                       ⁢ 
                       
                         N 
                         cells 
                         
                           DL 
                           , 
                           
                             2 
                             ⁢ 
                             
                               - 
                             
                             ⁢ 
                             DCI 
                           
                           , 
                           μ 
                         
                       
                     
                   
                   ) 
                 
               
               . 
             
           
         
       
     
     m PDCCH   max,slot,μ  is the maximum number of monitored PDCCH candidates per slot with SCS configuration μ∈{0, 1, 2, 3} (e.g., M PDCCH   max,slot,μ =44 for the case with μ=0, which corresponds to that SCS is 15 KHz); C PDCCH   max,slot,μ  is the maximum number of non-overlapped CCEs per slot with SCS configuration μ∈{0, 1, 2, 3}. μ∈{0, 1, 2, 3} is defined in 3GPP TS 38.213. As described supra, f(1), f(2), g(1), and g(2) are predefined or configurable scaling factors. 
       FIG. 8  is a diagram  800  illustrating monitoring PDCCHs by a UE  704 . In this example, the UE  704  supports carrier aggregation (CA) and is configured to operate on component carriers  810 - 1  to  810 - 8 . Further, the UE  704  is configured to monitor one PDCCHs from the TRP-A  702  on each of the component carriers  810 - 1  to  810 - 4  in a slot  816  and to monitor one PDCCH from the TRP-A  702  and one PDCCH from the TRP-B  703  on each of the component carriers  810 - 5  to  810 - 8  in the slot  816 . The UE  704  may receive, from the TRP-A  702  and/or the TRP-B  703 , one or more non-physical layer configurations that configure the component carriers  810 - 1  to  810 - 8 . In one configuration, the UE  704  receives a respective signaling including a non-physical layer configuration for configuring each of the component carriers  810 - 1  to  810 - 8 . The non-physical layer configurations may be transmitted through one or more RRC messages. 
     In another example, the UE  704  may switch from a first bandwidth part to a second bandwidth part within each of the component carriers  810 - 1  to  810 - 8 . The UE  704  may receive a non-physical layer configuration associated with the second bandwidth part indicating either single-DCCH or multi-DCCH reception is expected on each of the component carriers  810 - 1  to  810 - 8 . 
     Further, in this example. The SCS is 120 kHz. The pdcch-BlindDetectionCA is 4. The UE  704  sends, e.g., through an RRC message, the pdcch-BlindDetectionCA to the TRP-A  702  and/or the TRP-B  703 . The UE  704  may report the maximum number of component carriers supporting receiving more than one PDCCHs within a slot. The UE  704  may also report the maximum number of active BWPs across the component carriers  810 - 1  to  810 - 8  supporting receiving more than one PDCCH within a slot. 
     Further, in this example, (1) is 1,1(2) is 2, g(1) is 1, and g(2) is 2. That is, the number of blind detections/CCEs for a component carrier with 2-DCI-enabled is doubled comparing to the number for a component carrier with 1-DCI-enabled. 
     The UE  704  employs the techniques described supra to determine blind detection allocated on the component carriers  810 - 1  to  810 - 8  in a slot  816 . More specifically, for m=1 (i.e., 1-DCI-enabled), the total number of blind detections allocated to be performed on the component carriers  810 - 1  to  810 - 4  is: 
     
       
         
           
             
               
                 
                   f 
                   ⁡ 
                   
                     ( 
                     m 
                     ) 
                   
                 
                 · 
                 
                   N 
                   cells 
                   cap 
                 
                 · 
                 
                   N 
                   cells 
                   
                     DL 
                     , 
                     
                       m 
                       ⁢ 
                       
                         - 
                       
                       ⁢ 
                       DCI 
                     
                     , 
                     μ 
                   
                 
                 · 
                 
                   M 
                   PDCCH 
                   
                     max 
                     , 
                     slot 
                     , 
                     μ 
                   
                 
               
               
                 ( 
                 
                   
                     
                       f 
                       ⁡ 
                       
                         ( 
                         1 
                         ) 
                       
                     
                     ⁢ 
                     
                       Σ 
                       μ 
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           1 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                   + 
                   
                     
                       
                         f 
                         ⁡ 
                         
                           ( 
                           2 
                           ) 
                         
                       
                       · 
                       
                         Σ 
                         μ 
                       
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           2 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                 
                 ) 
               
             
             = 
             
               
                 
                   4 
                   · 
                   
                     ( 
                     
                       
                         N 
                         cells 
                         
                           DL 
                           , 
                           
                             1 
                             ⁢ 
                             
                               - 
                             
                             ⁢ 
                             DCI 
                           
                           , 
                           μ 
                         
                       
                       = 
                       4 
                     
                     ) 
                   
                   · 
                   
                     M 
                     PDCCH 
                     
                       max 
                       , 
                       slot 
                       , 
                       μ 
                     
                   
                 
                 
                   
                     ( 
                     
                       
                         
                           Σ 
                           μ 
                         
                         ⁢ 
                         
                           N 
                           cells 
                           
                             DL 
                             , 
                             
                               1 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               DCI 
                             
                             , 
                             μ 
                           
                         
                       
                       = 
                       4 
                     
                     ) 
                   
                   + 
                   
                     2 
                     · 
                     
                       ( 
                       
                         
                           
                             Σ 
                             μ 
                           
                           ⁢ 
                           
                             N 
                             cells 
                             
                               DL 
                               , 
                               
                                 2 
                                 ⁢ 
                                 
                                   - 
                                 
                                 ⁢ 
                                 DCI 
                               
                               , 
                               μ 
                             
                           
                         
                         = 
                         4 
                       
                       ) 
                     
                   
                 
               
               = 
               
                 
                   
                     4 
                     × 
                     4 
                     × 
                     
                       M 
                       PDCCH 
                       
                         max 
                         , 
                         slot 
                         , 
                         μ 
                       
                     
                   
                   12 
                 
                 = 
                 
                   
                     1 
                     3 
                   
                   ⁢ 
                   
                     
                       ( 
                       
                         4 
                         × 
                         
                           M 
                           PDCCH 
                           
                             max 
                             , 
                             slot 
                             , 
                             μ 
                           
                         
                       
                       ) 
                     
                     . 
                   
                 
               
             
           
         
       
     
     The total number of blind detections allocated to be performed on the component carriers  810 - 5  to  810 - 8  is: 
     
       
         
           
             
               
                 
                   f 
                   ⁡ 
                   
                     ( 
                     m 
                     ) 
                   
                 
                 · 
                 
                   N 
                   cells 
                   cap 
                 
                 · 
                 
                   N 
                   cells 
                   
                     DL 
                     , 
                     
                       m 
                       ⁢ 
                       
                         - 
                       
                       ⁢ 
                       DCI 
                     
                     , 
                     μ 
                   
                 
                 · 
                 
                   M 
                   PDCCH 
                   
                     max 
                     , 
                     slot 
                     , 
                     μ 
                   
                 
               
               
                 ( 
                 
                   
                     
                       f 
                       ⁡ 
                       
                         ( 
                         1 
                         ) 
                       
                     
                     ⁢ 
                     
                       Σ 
                       μ 
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           1 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                   + 
                   
                     
                       
                         f 
                         ⁡ 
                         
                           ( 
                           2 
                           ) 
                         
                       
                       · 
                       
                         Σ 
                         μ 
                       
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           2 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                 
                 ) 
               
             
             = 
             
               
                 
                   2 
                   × 
                   
                     4 
                     · 
                     
                       ( 
                       
                         
                           N 
                           cells 
                           
                             DL 
                             , 
                             
                               1 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               DCI 
                             
                             , 
                             μ 
                           
                         
                         = 
                         4 
                       
                       ) 
                     
                     · 
                     
                       M 
                       PDCCH 
                       
                         max 
                         , 
                         slot 
                         , 
                         μ 
                       
                     
                   
                 
                 
                   
                     ( 
                     
                       
                         
                           Σ 
                           μ 
                         
                         ⁢ 
                         
                           N 
                           cells 
                           
                             DL 
                             , 
                             
                               1 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               DCI 
                             
                             , 
                             μ 
                           
                         
                       
                       = 
                       4 
                     
                     ) 
                   
                   + 
                   
                     2 
                     · 
                     
                       ( 
                       
                         
                           
                             Σ 
                             μ 
                           
                           ⁢ 
                           
                             N 
                             cells 
                             
                               DL 
                               , 
                               
                                 2 
                                 ⁢ 
                                 
                                   - 
                                 
                                 ⁢ 
                                 DCI 
                               
                               , 
                               μ 
                             
                           
                         
                         = 
                         4 
                       
                       ) 
                     
                   
                 
               
               = 
               
                 
                   
                     2 
                     × 
                     4 
                     × 
                     4 
                     × 
                     
                       M 
                       PDCCH 
                       
                         max 
                         , 
                         slot 
                         , 
                         μ 
                       
                     
                   
                   12 
                 
                 = 
                 
                   
                     2 
                     3 
                   
                   ⁢ 
                   
                     
                       ( 
                       
                         4 
                         × 
                         
                           M 
                           PDCCH 
                           
                             max 
                             , 
                             slot 
                             , 
                             μ 
                           
                         
                       
                       ) 
                     
                     . 
                   
                 
               
             
           
         
       
     
     Further, the UE  704  determines CCEs  820 - 1  to  820 - 8  allocated to the component carriers  810 - 1  to  810 - 8  in the slot  816 . More specifically, for m=1 (i.e., 1-DCI-enabled), the total number of CCEs allocated on the component carriers  810 - 1  to  810 - 4  is: 
     
       
         
           
             
               
                 
                   g 
                   ⁡ 
                   
                     ( 
                     m 
                     ) 
                   
                 
                 · 
                 
                   N 
                   cells 
                   cap 
                 
                 · 
                 
                   N 
                   cells 
                   
                     DL 
                     , 
                     
                       m 
                       ⁢ 
                       
                         - 
                       
                       ⁢ 
                       DCI 
                     
                     , 
                     μ 
                   
                 
                 · 
                 
                   M 
                   PDCCH 
                   
                     max 
                     , 
                     slot 
                     , 
                     μ 
                   
                 
               
               
                 ( 
                 
                   
                     
                       g 
                       ⁡ 
                       
                         ( 
                         1 
                         ) 
                       
                     
                     ⁢ 
                     
                       Σ 
                       μ 
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           1 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                   + 
                   
                     
                       
                         g 
                         ⁡ 
                         
                           ( 
                           2 
                           ) 
                         
                       
                       · 
                       
                         Σ 
                         μ 
                       
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           2 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                 
                 ) 
               
             
             = 
             
               
                 
                   4 
                   · 
                   
                     ( 
                     
                       
                         N 
                         cells 
                         
                           DL 
                           , 
                           
                             1 
                             ⁢ 
                             
                               - 
                             
                             ⁢ 
                             DCI 
                           
                           , 
                           μ 
                         
                       
                       = 
                       4 
                     
                     ) 
                   
                   · 
                   
                     C 
                     PDCCH 
                     
                       max 
                       , 
                       slot 
                       , 
                       μ 
                     
                   
                 
                 
                   
                     ( 
                     
                       
                         
                           Σ 
                           μ 
                         
                         ⁢ 
                         
                           N 
                           cells 
                           
                             DL 
                             , 
                             
                               1 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               DCI 
                             
                             , 
                             μ 
                           
                         
                       
                       = 
                       4 
                     
                     ) 
                   
                   + 
                   
                     2 
                     · 
                     
                       ( 
                       
                         
                           
                             Σ 
                             μ 
                           
                           ⁢ 
                           
                             N 
                             cells 
                             
                               DL 
                               , 
                               
                                 2 
                                 ⁢ 
                                 
                                   - 
                                 
                                 ⁢ 
                                 DCI 
                               
                               , 
                               μ 
                             
                           
                         
                         = 
                         4 
                       
                       ) 
                     
                   
                 
               
               = 
               
                 
                   
                     4 
                     × 
                     4 
                     × 
                     
                       C 
                       PDCCH 
                       
                         max 
                         , 
                         slot 
                         , 
                         μ 
                       
                     
                   
                   12 
                 
                 = 
                 
                   
                     1 
                     3 
                   
                   ⁢ 
                   
                     
                       ( 
                       
                         4 
                         × 
                         
                           C 
                           PDCCH 
                           
                             max 
                             , 
                             slot 
                             , 
                             μ 
                           
                         
                       
                       ) 
                     
                     . 
                   
                 
               
             
           
         
       
     
     The total number of CCEs allocated on the component carriers  810 - 5  to  810 - 8  is: 
     
       
         
           
             
               
                 
                   g 
                   ⁡ 
                   
                     ( 
                     m 
                     ) 
                   
                 
                 · 
                 
                   N 
                   cells 
                   cap 
                 
                 · 
                 
                   N 
                   cells 
                   
                     DL 
                     , 
                     
                       m 
                       ⁢ 
                       
                         - 
                       
                       ⁢ 
                       DCI 
                     
                     , 
                     μ 
                   
                 
                 · 
                 
                   M 
                   PDCCH 
                   
                     max 
                     , 
                     slot 
                     , 
                     μ 
                   
                 
               
               
                 ( 
                 
                   
                     
                       g 
                       ⁡ 
                       
                         ( 
                         1 
                         ) 
                       
                     
                     ⁢ 
                     
                       Σ 
                       μ 
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           1 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                   + 
                   
                     
                       
                         g 
                         ⁡ 
                         
                           ( 
                           2 
                           ) 
                         
                       
                       · 
                       
                         Σ 
                         μ 
                       
                     
                     ⁢ 
                     
                       N 
                       cells 
                       
                         DL 
                         , 
                         
                           2 
                           ⁢ 
                           
                             - 
                           
                           ⁢ 
                           DCI 
                         
                         , 
                         μ 
                       
                     
                   
                 
                 ) 
               
             
             = 
             
               
                 
                   2 
                   × 
                   
                     4 
                     · 
                     
                       ( 
                       
                         
                           N 
                           cells 
                           
                             DL 
                             , 
                             
                               1 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               DCI 
                             
                             , 
                             μ 
                           
                         
                         = 
                         4 
                       
                       ) 
                     
                     · 
                     
                       C 
                       PDCCH 
                       
                         max 
                         , 
                         slot 
                         , 
                         μ 
                       
                     
                   
                 
                 
                   
                     ( 
                     
                       
                         
                           Σ 
                           μ 
                         
                         ⁢ 
                         
                           N 
                           cells 
                           
                             DL 
                             , 
                             
                               1 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               DCI 
                             
                             , 
                             μ 
                           
                         
                       
                       = 
                       4 
                     
                     ) 
                   
                   + 
                   
                     2 
                     · 
                     
                       ( 
                       
                         
                           
                             Σ 
                             μ 
                           
                           ⁢ 
                           
                             N 
                             cells 
                             
                               DL 
                               , 
                               
                                 2 
                                 ⁢ 
                                 
                                   - 
                                 
                                 ⁢ 
                                 DCI 
                               
                               , 
                               μ 
                             
                           
                         
                         = 
                         4 
                       
                       ) 
                     
                   
                 
               
               = 
               
                 
                   
                     2 
                     × 
                     4 
                     × 
                     4 
                     × 
                     
                       C 
                       PDCCH 
                       
                         max 
                         , 
                         slot 
                         , 
                         μ 
                       
                     
                   
                   12 
                 
                 = 
                 
                   
                     2 
                     3 
                   
                   ⁢ 
                   
                     
                       ( 
                       
                         4 
                         × 
                         
                           C 
                           PDCCH 
                           
                             max 
                             , 
                             slot 
                             , 
                             μ 
                           
                         
                       
                       ) 
                     
                     . 
                   
                 
               
             
           
         
       
     
     In another example, f(1) is 1,1(2)=1, g((1)) is 1, and g((2)) is 1. In other words, the maximum numbers of blind detections/CCEs allocations for each CC are independent of single-DCI or two-DCI based multi-TRP transmission. Further, ceil, floor, or rounding function can be used if the scaled number for max number of blind detections/CCEs is not an integer. 
     As such, the UE  704  can determine blind detections and CCEs allocated to each of the component carriers  810 - 1  to  810 - 8 . Accordingly, the UE  704  performs blind detections according to the allocations. 
     In summary, the total limits for the numbers of blind detections/CCEs across configured component carriers may be calculated as defined in the 3GPP TS 38.213 based on N cells   cap , which is pdcch-BlindDetectionCA as reported by the UE. 
     In certain configurations, the maximum numbers of monitored PDCCH candidates and non-overlapped CCEs per slot for total limits, m PDCCH   total,slot,μ , C PDCCH   total,slot,μ  defined in 3GPP TS 38.213, for a serving cell configured with multi-DCI based multi-TRP transmission are increased as f(2)/f(1) and g(2)/g(1) times the numbers for a serving cell configured with single-DCI based transmission. 
     In certain configurations, the maximum numbers of blind detections/CCEs, M PDCCH   max,slot,μ  and C PDCCH   max,slot,μ , are increased as f(2)/f(1) and g(2)/g(1) times the values defined in Table 10.1-2 and Table 10.1-3 in 3GPP TS 38.213 for a serving cell configured with multi-DCI based multi-TRP. 
     In another technique, indication for the operation of S-DCI or M-DCI is at BWP level. A multi-TRP IE for the indication can be used for 1) enabling single-DCI based multi-TRP transmission; or 2) enabling two-DCI based multi-TRP transmission. In a first configuration, with serving cell based indications, the multi-TRP IE for the indication can be under PDSCH-ServingCellConfig: The IE PDSCH-ServingCellConfig is used to configure UE specific PDSCH parameters that are common across the UE&#39;s BWPs of one serving cell. 
     In a second configuration, with BWP based indications, the multi-TRP IE for the indication can be under BWP-DownlinkDedicated. The IE BWP-DownlinkDedicated is used to configure the dedicated (UE specific) parameters of a downlink BWP. Alternatively, the multi-TRP IE may be introduced under pdsch-Config of BWP-DownlinkDedicated. 
       FIG. 9  is a flow chart  900  of a method (process) for performing PDCCH monitoring. The method may be performed by a UE (e.g., the UE  704 , the apparatus  1002 , and the apparatus  1002 ′). At operation  902 , the UE may send an indication indicating a capability of the UE for performing the blind detections. At operation  904 , the UE may send an indication indicating a maximum number of component carriers configurable at the UE for supporting reception of at least two PDCCHs in a slot. 
     At operation  908 , the UE receives one or more configurations indicating that the UE is expected to receive one PDCCH on each of the N1 component carriers in a slot and to receive at least two PDCCHs on each of the N2 component carriers in a slot. At operation  910 , the UE receives a configuration indicating a first predetermined scaling factor X. 
     At operation  912 , the UE determines the N1 component carriers on each of which the UE is configured to detect a respective one PDCCH in a slot. N1 is a positive integer. At operation  914 , the UE determines the N2 component carriers on each of which the UE is configured to detect respective at least two PDCCHs in the slot. N2 is a positive integer. At operation  916 , the UE determines a total Q blind detections of PDCCH that the UE is capable of performing. Q is a positive integer. At operation  918 , the UE determines the first predetermined scaling factor X. X is a positive number. 
     At operation  920 , the UE allocates M1 blind detections of the Q blind detections to be available on each of the N1 component carriers and M2 blind detections of the Q blind detections to be available on each of the N2 component carriers such that (N1*M1+N2*M2) is a largest integer no greater than Q. M1 is a positive integer. M2 is a positive integer and equal to X*M1. 
     At operation  924 , the UE determines that the component carrier is belonging to the N1 component carriers when the first bandwidth part is activated or that the component carrier is belonging to the N2 component carriers when the second bandwidth part is activated. 
     At operation  926 , the UE receives a configuration indicating the second predetermined scaling factor. At operation  928 , the UE determines a total P Control-Channel Elements (CCEs) for PDCCH monitoring allocated on the N1 component carriers and the N2 component carriers. P is a positive integer. At operation  930 , the UE determines the second predetermined scaling factor Y. Y is a positive number. At operation  932 , the UE determines C1 CCEs allocated on each of the N1 component carriers and C2 CCEs allocated on each of the N2 component carriers such that (N1*C1+N2*M2) is a largest integer no greater than P. C1 is a positive integer. C2 is positive integer and equal to Y*C1. At operation  934 , the UE performs blind detections in accordance with the allocations. The PDCCH monitoring is performed on the respective C1 CCEs on each of the N1 component carriers and the respective C2 CCEs on each of the N2 component carriers. 
     In certain configurations, the respective one PDCCH on each of the N1 component carriers is to be received from a first TRP, wherein the respective at least two PDCCHs are to be received from the first TRP and a second TRP. In certain configurations, the one or more configurations includes a respective non-physical layer configuration for each of the N1 component carriers and the N2 component carriers. In certain configurations, the first predetermined scaling factor is 2. In certain configurations, the second predetermined scaling factor is 2. 
       FIG. 10  is a conceptual data flow diagram  1000  illustrating the data flow between different components/means in an exemplary apparatus  1002 . The apparatus  1002  may be a UE. The apparatus  1002  includes a reception component  1004 , an allocation component  1006 , a BD component  1008 , and a transmission component  1010 . 
     The allocation component  1006  may send an indication indicating a capability of the UE for performing the blind detections. The allocation component  1006  may send an indication indicating a maximum number of component carriers configurable at the UE for supporting reception of at least two PDCCHs in a slot. 
     The allocation component  1006  receives one or more configurations indicating that the UE is expected to receive one PDCCH on each of the N1 component carriers in a slot and to receive at least two PDCCHs on each of the N2 component carriers in a slot. The allocation component  1006  receives a configuration indicating a first predetermined scaling factor X. 
     The allocation component  1006  determines the N1 component carriers on each of which the UE is configured to detect a respective one PDCCH in a slot. N1 is a positive integer. The allocation component  1006  determines the N2 component carriers on each of which the UE is configured to detect respective at least two PDCCHs in the slot. N2 is a positive integer. The allocation component  1006  determines a total Q blind detections of PDCCH that the UE is capable of performing. Q is a positive integer. The allocation component  1006  determines the first predetermined scaling factor X. X is a positive number. 
     The allocation component  1006  allocates M1 blind detections of the Q blind detections to be available on each of the N1 component carriers and M2 blind detections of the Q blind detections to be available on each of the N2 component carriers such that (N1*M1+N2*M2) is a largest integer no greater than Q. M1 is a positive integer. M2 is a positive integer and equal to X*M1. 
     The allocation component  1006  determines that the component carrier is belonging to the N1 component carriers when the first bandwidth part is activated or that the component carrier is belonging to the N2 component carriers when the second bandwidth part is activated. 
     The allocation component  1006  receives a configuration indicating the second predetermined scaling factor. The allocation component  1006  determines a total P Control-Channel Elements (CCEs) for PDCCH monitoring allocated on the N1 component carriers and the N2 component carriers. P is a positive integer. The allocation component  1006  determines the second predetermined scaling factor Y. Y is a positive number. The allocation component  1006  determines C1 CCEs allocated on each of the N1 component carriers and C2 CCEs allocated on each of the N2 component carriers such that (N1*C1+N2*M2) is a largest integer no greater than P. C1 is a positive integer. C2 is positive integer and equal to Y*C1. 
     The BD component  1008  performs blind detections in accordance with the allocations. The PDCCH monitoring is performed on the respective C1 CCEs on each of the N1 component carriers and the respective C2 CCEs on each of the N2 component carriers. 
     In certain configurations, the respective one PDCCH on each of the N1 component carriers is to be received from a first TRP, wherein the respective at least two PDCCHs are to be received from the first TRP and a second TRP. In certain configurations, the one or more configurations includes a respective non-physical layer configuration for each of the N1 component carriers and the N2 component carriers. In certain configurations, the first predetermined scaling factor is 2. In certain configurations, the second predetermined scaling factor is 2. 
       FIG. 11  is a diagram  1100  illustrating an example of a hardware implementation for an apparatus  1002 ′ employing a processing system  1114 . The apparatus  1002 ′ may be a UE. The processing system  1114  may be implemented with a bus architecture, represented generally by a bus  1124 . The bus  1124  may include any number of interconnecting buses and bridges depending on the specific application of the processing system  1114  and the overall design constraints. The bus  1124  links together various circuits including one or more processors and/or hardware components, represented by one or more processors  1104 , the reception component  1004 , the allocation component  1006 , the BD component  1008 , the transmission component  1010 , and a computer-readable medium/memory  1106 . The bus  1124  may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, etc. 
     The processing system  1114  may be coupled to a transceiver  1110 , which may be one or more of the transceivers  254 . The transceiver  1110  is coupled to one or more antennas  1120 , which may be the communication antennas  252 . 
     The transceiver  1110  provides a means for communicating with various other apparatus over a transmission medium. The transceiver  1110  receives a signal from the one or more antennas  1120 , extracts information from the received signal, and provides the extracted information to the processing system  1114 , specifically the reception component  1004 . In addition, the transceiver  1110  receives information from the processing system  1114 , specifically the transmission component  1010 , and based on the received information, generates a signal to be applied to the one or more antennas  1120 . 
     The processing system  1114  includes one or more processors  1104  coupled to a computer-readable medium/memory  1106 . The one or more processors  1104  are responsible for general processing, including the execution of software stored on the computer-readable medium/memory  1106 . The software, when executed by the one or more processors  1104 , causes the processing system  1114  to perform the various functions described supra for any particular apparatus. The computer-readable medium/memory  1106  may also be used for storing data that is manipulated by the one or more processors  1104  when executing software. The processing system  1114  further includes at least one of the reception component  1004 , the allocation component  1006 , the BD component  1008 , and the transmission component  1010 . The components may be software components running in the one or more processors  1104 , resident/stored in the computer readable medium/memory  1106 , one or more hardware components coupled to the one or more processors  1104 , or some combination thereof. The processing system  1114  may be a component of the UE  250  and may include the memory  260  and/or at least one of the TX processor  268 , the RX processor  256 , and the communication processor  259 . 
     In one configuration, the apparatus  1002 /apparatus  1002 ′ for wireless communication includes means for performing each of the operations of  FIG. 9 . The aforementioned means may be one or more of the aforementioned components of the apparatus  1002  and/or the processing system  1114  of the apparatus  1002 ′ configured to perform the functions recited by the aforementioned means. 
     As described supra, the processing system  1114  may include the TX Processor  268 , the RX Processor  256 , and the communication processor  259 . As such, in one configuration, the aforementioned means may be the TX Processor  268 , the RX Processor  256 , and the communication processor  259  configured to perform the functions recited by the aforementioned means. 
     It is understood that the specific order or hierarchy of blocks in the processes/flowcharts disclosed is an illustration of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes/flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented. 
     The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module,” “mechanism,” “element,” “device,” and the like may not be a substitute for the word “means.” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for.”