Control signal monitoring
Patent Information
- Application Number
- PCT/CN2025/133534
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-08-27
Smart Images

Figure CN2025133534_27082026_PF_FP_ABST
Abstract
Description
CONTROL SIGNAL MONITORINGTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to control signal monitoring.BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations (BSs) , which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .
[0003] With the development of the communication, regarding the physical layer control and data scheduling, especially downlink control signal and channel enhancement (e.g., physical downlink control channel) , there are still some issues to be addressed.SUMMARY
[0004] The present disclosure relates to methods, apparatuses, and systems that support control signal monitoring in accordance with aspects of the present disclosure.
[0005] Some implementations of the method and apparatuses described herein include, receiving a configuration of a search space, wherein the search space is associated with multiple control resource sets (CORESETs) , and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; and monitoring a control signal based on the search space, wherein the control signal comprises one or more control channel elements (CCEs) , and a CCE of the one or more CCEs comprises multiple resource element groups (REGs) based on mapping between REGs and the CCE.
[0006] Some implementations of the method and apparatuses described herein may further include monitoring the control signal by: monitoring the control signal based on an index or indexes of the CCE, wherein the index or indexes of the CCE are associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the CCE.
[0007] Some implementations of the method and apparatuses described herein may further include monitoring the control signal by: monitoring the control signal based on an index of a REG among the multiple REGs, wherein the index of the REG is associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the REG.
[0008] Some implementations of the method and apparatuses described herein may further include determining the sub-band by dividing the CORESET in frequency based on the configuration.
[0009] In some implementations of the method and apparatuses described herein, the order for indexing the CCE may be predefined or preconfigured in a configuration or indicated in the control signal.
[0010] In some implementations of the method and apparatuses described herein, the order for indexing the REG may be predefined or preconfigured in a configuration or indicated in the control signal.
[0011] In some implementations of the method and apparatuses described herein, the search space is associated with the multiple CORESETs, and the mapping between REGs and the CCE for the control signal may be associated with one of the following: a predefined value of a REG bundle size for the mapping between REGs and the CCE among the multiple CORESETs; a least common multiple (LCM) value of a REG bundle size among the multiple CORESETs; or a predefined mapping comprising non-interleaving mapping.
[0012] In some implementations of the method and apparatuses described herein, the search space is associated with the one CORESET, and some implementations of the method and apparatuses described herein may further include receiving, from a base station, a bitmap indication indicating frequency domain resource of the one CORESET, wherein at least one of length, or granularity of the bitmap indication is associated with a number of the multiple frequency bands or the multiple frequency carriers.
[0013] In some implementations of the method and apparatuses described herein, the search space is associated with one CORESET, and the mapping between REGs and the CCE may be associated with one of the following: full interleaving among the multiple frequency bands or among the multiple frequency carriers; partial interleaving within a sub-band of the multiple frequency bands or the multiple frequency carriers; or non-interleaving among the multiple frequency bands or the multiple frequency carriers.
[0014] Some implementations of the method and apparatuses described herein include, transmitting a configuration of a search space, wherein the search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; and transmitting, to a user equipment (UE) , a control signal based on the search space, wherein the control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE.
[0015] Some implementations of the method and apparatuses described herein may further include determining an index or indexes of the CCE based on at least one of the following: the one or more frequency bands; indexes of the multiple CORESETs; indexes of the one or more frequency bands; indexes of the one or more frequency carriers; or an order for indexing the CCE.
[0016] Some implementations of the method and apparatuses described herein may further include determining an index of a REG among the multiple REGs based on at least one of the following: the one or more frequency bands; indexes of the multiple CORESETs; indexes of the one or more frequency bands; indexes of the one or more frequency carriers; or an order for indexing the c multiple REG.
[0017] Some implementations of the method and apparatuses described herein may further include determining the sub-band by dividing the CORESET in frequency based on the configuration.
[0018] In some implementations of the method and apparatuses described herein, the order for indexing the CCE may be predefined or preconfigured in a configuration or indicated in the control signal.
[0019] In some implementations of the method and apparatuses described herein, the order for indexing the REG may be predefined or preconfigured in a configuration or indicated in the control signal.
[0020] In some implementations of the method and apparatuses described herein, the search space is associated with the multiple CORESETs, and some implementations of the method and apparatuses described herein may further include determining the mapping between REGs and the CCE for the control signal based on one of the following: a predefined value of a REG bundle size for the mapping between REGs and the CCE among the multiple CORESETs; a LCM value of a REG bundle size among the multiple CORESETs; or a predefined mapping comprising non-interleaving mapping.
[0021] In some implementations of the method and apparatuses described herein, the search space is associated with the one CORESET, and some implementations of the method and apparatuses described herein may further include transmitting, to the UE, a bitmap indication indicating frequency domain resource of the one CORESET, wherein at least one of length, or granularity of the bitmap indication is associated with a number of the multiple frequency bands or the multiple frequency carriers.
[0022] In some implementations of the method and apparatuses described herein, the search space is associated with one CORESET, and some implementations of the method and apparatuses described herein may further include determining the mapping between REGs and the CCE by one of the following: performing full interleaving among the multiple frequency bands or among the multiple frequency carriers; performing partial interleaving within a sub-band of the multiple frequency bands or the multiple frequency carriers; or performing non-interleaving among the multiple frequency bands or the multiple frequency carriers.BRIEF DESCRIPTION OF THE DRAWINGS
[0023] FIG. 1A illustrates an example of a wireless communications system that supports control signal monitoring in accordance with aspects of the present disclosure.
[0024] FIG. 1B illustrates examples of the CORESET in the Long Term Evolution (LTE) and the new radio (NR) .
[0025] FIG. 1C illustrates an example of the REG and the CORESET associated with aspects of the present disclosure.
[0026] FIG. 1D illustrates an example of the interleaving mapping between the REG and the CCE.
[0027] FIG. 1E illustrates an example of the non-interleaving mapping between the REG and the CCE.
[0028] FIG. 1F illustrates an example process of the mapping between the REG and the CCE.
[0029] FIG. 1G illustrates an example of 5G NR CA structure associated with aspects of the present disclosure.
[0030] FIG. 1H illustrates an example of potential 6G CA structure associated with aspects of the present disclosure.
[0031] FIG. 2 illustrates an example signaling chart illustrating an example process that supports control signal monitoring in accordance with aspects of the present disclosure.
[0032] FIG. 3 illustrates an example of a COREST combination in accordance with aspects of the present disclosure.
[0033] FIG. 4 illustrates an example of REG numbering in accordance with aspects of the present disclosure.
[0034] FIG. 5A illustrates an example of numbering the CCE indexes in accordance with aspects of the present disclosure.
[0035] FIG. 5B illustrates another example of numbering the CCE indexes in accordance with aspects of the present disclosure.
[0036] FIG. 6 illustrates examples of PDCCH candidates in accordance with aspects of the present disclosure.
[0037] FIG. 7 illustrates an example of CORESET combination in accordance with aspects of the present disclosure.
[0038] FIG. 8 illustrates an example of full interleaving in accordance with aspects of the present disclosure.
[0039] FIG. 9 illustrates an example of partial interleaving in accordance with aspects of the present disclosure.
[0040] FIG. 10 illustrate illustrates an example of a device that supports control signal monitoring in accordance with aspects of the present disclosure.
[0041] FIG. 11 illustrate illustrates an example of a processor that supports control signal monitoring in accordance with aspects of the present disclosure.
[0042] FIG. 12 illustrates a flowchart of a method that supports control signal monitoring in accordance with aspects of the present disclosure.
[0043] FIG. 13 illustrates a flowchart of a method that supports control signal monitoring in accordance with aspects of the present disclosure.
[0044] Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTION
[0045] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.
[0046] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0047] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0048] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0049] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0050] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as, 5G new radio (NR) , Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) , and so on. Further, the communications between a user equipment and a network device in the communication network may be performed according to any suitable generation communication protocols, including but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.
[0051] As used herein, the term “network device” generally refers to a node in a communication network via which a user equipment can access the communication network and receive services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , an infrastructure device for a V2X (vehicle-to-everything) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto a base station (BS) , a pico BS, and so forth, depending on the applied terminology and technology. The network device may further refer to a network function (NF) in the core network, for example, a SMF, an AMF, a PCF, a UPF or devices with same function in future network architectures, and so forth.
[0052] As used herein, the term “UE” generally refers to any end device that may be capable of wireless communications. By way of example rather than a limitation, a user equipment may also be referred to as a communication device, a terminal device, an end user device, a subscriber station (SS) , an unmanned aerial vehicle (UAV) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) . The user equipment may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet, a wearable user equipment, a personal digital assistant (PDA) , a portable computer, a desktop computer, an image capture user equipment such as a digital camera, a gaming user equipment, a music storage and playback appliance, a vehicle-mounted wireless user equipment, a wireless endpoint, a mobile station, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , a USB dongle, a smart device, wireless customer-premises equipment (CPE) , an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device (for example, a remote surgery device) , an industrial device (for example, a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. In the following description, the terms: “user equipment, ” “communication device, ” “terminal, ” “user equipment” and “UE, ” may be used interchangeably.
[0053] FIG. 1A illustrates an example of a wireless communications system 100A that supports control signal monitoring in accordance with aspects of the present disclosure. The wireless communications system 100A may include one or more network entities 102 (also referred to as network equipment) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100A may support various radio access technologies. In some implementations, the wireless communications system 100A may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100A may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100A may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100A may support radio access technologies beyond 5G. Additionally, the wireless communications system 100A may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0054] The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100A. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
[0055] A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0056] The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100A. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100A. In some other implementations, a UE 104 may be mobile in the wireless communications system 100A.
[0057] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1A. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1A. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100A.
[0058] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0059] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N6, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .
[0060] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.
[0061] An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0062] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.
[0063] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0064] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0065] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.
[0066] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .
[0067] In the wireless communications system 100A, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100A (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0068] One or more numerologies may be supported in the wireless communications system 100A, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0069] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0070] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100A. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0071] In the wireless communications system 100A, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100A may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0072] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0073] A new study item is approved for 6G. Regarding physical layer structure for 6G radio access technology (6GR) , 5G new radio (NR) waveforms and modulation are to be considered for the 6GR and is also the benchmark for other potential proposals. The 6G frame structure is designed to be compatibility with 5G NR, enabling efficient 5G-6G multi-RAT spectrum sharing (MRSS) . Channel coding, using low density parity check (LDPC) and Polar code as baseline, considers applicable extensions to satisfy 6G requirements and characteristics with acceptable performance / complexity trade-off. Channel bandwidth (at least minimum and maximum) , numerology, avoids multiple numerologies for the same band / sub-range (e.g., enabling synergies among frequency bands in the ~7GHz range) . The new study item further involves physical layer control, data scheduling and a hybrid automatic repeat request (HARQ) operation and a multiple-input multiple output (MIMO) operation.
[0074] In NR, the CORESET is a set of physical resources (i.e., a specific area on NR downlink resource grid) and a set of parameters that is used to carry physical downlink control channel (PDCCH) / downlink control information (DCI) . Table 1 illustrates the set of some parameters. Table 1 A set of parameters of CORESET
[0075] A CORESET is made up of multiples resource blocks (i.e., multiples of 12 resource elements (REs) ) in the frequency domain and 1 or 2 or 3 OFDM symbol (s) in the time domain.
[0076] The definition of RE in current NR PDCCH is same as the LTE. It is the smallest unit of the resource grid made up of one subcarrier in frequency domain and one OFDM symbol in time domain.
[0077] In current NR PDCCH, one REG is made up of one resource block (e.g., 12 resource elements in the frequency domain) and one OFDM symbol in time domain. For example, a control-channel element consists of 6 resource-element groups (REGs) where a resource-element group equals one resource block during one OFDM symbol.
[0078] One REG bundle is made up of multiple REGs. The bundle size is specified by the parameter “L” as shown in TABLE 1. The “L” is determined by the RRC parameter reg-bundle-size.
[0079] A CCE is made up multiple REGs. The number of REG bundles within a CCE varies. REGs within a CORESET are numbered in increasing order in a time-first manner, starting with 0 for the first OFDM symbol and the lowest-numbered resource block in the CORESET.
[0080] The aggregation level indicates how many CCEs are allocated for a PDCCH. The aggregation level and the number of allocated CCEs is defined in the table 2. Table 2: Supported PDCCH aggregation levels
[0081] REGs are bundled in groups of L (typically, L=6) by numbering the resource elements in the CORESET in increasing order of first time and then frequency and grouping according to this order. For example, the CORESET in FIG. 1C has 3 symbols, this means that each REG bundle of L=6 REGs is formed by 2 resource blocks in frequency domain times 3 symbols in time domain.
[0082] The NR supports distributed and localized mapping for a DCI in a CORESET. This is done by configuring interleaved or non-interleaved CCE-to-REG mapping for each CORESET.
[0083] For interleaved CCE-to-REG mapping, REG bundles constituting the CCEs for a PDCCH are distributed in the frequency domain in units of REG bundles. A REG bundle is a set of indivisible resources consisting of neighboring REGs. A REG bundle spans across all OFDM symbols for the given CORESET.
[0084] The interleaved CCE-to-REG mapping may enable both a time domain processing gain and frequency domain diversity. The interleaved CCE-to-REG mapping may be visualized as a process for which REG bundle indices are continuously filled in an array row-wise first and then read out column-wise. This process is often called block interleaving. By this means, adjacent CCEs for a PDCCH are broken down into scattered REG bundles in the frequency domain as shown in FIG. 1D.
[0085] For non-interleaved CCE-to-RE mapping, all CCEs for a DCI with AL L are mapped in consecutive REG bundles of the CORESET as shown in FIG. 1E.
[0086] A UE can be configured with multiple control-resource sets. Each control-resource set is associated with one CCE-to-REG mapping. The CCE-to-REG mapping for a control-resource set can be interleaved or non-interleaved and is described by REG bundles.
[0087] FIG. 1F illustrates an example process of the mapping between the REG and the CCE. As shown in FIG. 1F, REG bundle i is defined as REGs {iL, iL+1, ..., iL+L-1} , where L is the REG bundle size, and is the number of REGs in the CORESET.
[0088] CCE j consists of REG bundles {f (6j / L) , f (6j / L+1) , ..., f (6j / L+6 / L-1) } where f (·) is an interleaver.
[0089] For non-interleaved CCE-to-REG mapping, L=6 and f (x) =x.
[0090] For interleaved CCE-to-REG mapping, L∈ {2, 6} for and for The interleaver is defined by: x=cR+r r=0, 1, …, R-1 c=0, 1, …, C-1 R∈{2, 3, 6} where nshift is configured by higher layer parameters, e.g., nshift=1.
[0091] In current NR networks, the CA is the primary technology for expanding bandwidth by aggregating multiple contiguous or non-contiguous carriers (e.g., component carriers, CCs) to achieve higher data rates.
[0092] Each CC operates as an independent cell with its own per-cell configurations, including frame structure, reference signals, and control channels, thereby incurring a certain level of configuration overhead.
[0093] Due to the limited bandwidth of operators’s pectrums and spectrum re-farming, more and more fragmented spectrum resources with narrow bandwidth will be allocated to 6G system in the future.
[0094] To use these fragmented spectrum with narrow bandwidth more efficiently, single cell over multiple carrier (SCMC) can be studied in 6G, where non-contiguous spectrum can be aggregated together and regarded as one serving cell for transmission and reception.
[0095] FIG. 1G illustrates an example of 5G NR CA structure associated with aspects of the present disclosure. The UE1 may monitor CORESET1, and the UE2 may monitor CORESET2. CORESET1 is associated with BWP 3 and Carrier 2, and CORESET2 is associated with BWP 4 and Carrier 3.
[0096] FIG. 1H illustrates an example of potential 6G CA structure associated with aspects of the present disclosure. UE1 may monitor CORESET X, the UE2 may monitor CORESET Y, and the UE3 may monitor CORESET I. CORESET X is associated with BWP 5 and Carrier 4, and CORESET Y is associated with BWP 5 and Carrier 5. CORESET I is associated with BWPs 5 and 6 and Carriers 4 and 5. Frequency bands corresponding to CORESET I are discrete. Optionally, the UE may be only configured with carriers or BWPs or other terms indicating a frequency band (range) , and it may not be associated with the concept of BWP and carrier simultaneously. So, CORESET X is associated with Carrier 4, and CORESET Y is associated with Carrier 5. CORESET I is associated with Carriers 4 and 5.
[0097] The PDCCH in CA may be assumed as PDCCH in bandwidth extension in 6G with the concept of SCMC. The intra-band spectrum aggregation can be as a starting point. One transport block (TB) (PDSCH) across multiple scattered spectrums and whether to support different symbols numbers among carriers and new designed mapping schemes may be considered. BWP-based operation is also considered to support different UE bandwidth capabilities. In addition, in control signal design in 6G (especially in the concept of SCMC) , the CORESET across multiple scattered spectrums and different CORESET symbols numbers among carriers may be considered.
[0098] For the PDCCH in the CA, the fragmented spectrum comprises of small number of physical resource blocks (PRBs) so that a CORESET spanning multiple carriers or even multiple bands can be studied to enhance PDCCH reliability and resource efficiency.
[0099] High blind decode (BD) complexity for CA operation with SC-DCI leads to increased UE complexity and power consumption, making stringent HRT (high reliability target) requirements more challenging to meet for larger CA configurations. It is easier for a UE to share BD / CCE budget if multiple carriers are aggregated as a single serving cell.
[0100] The PDCCH may be configured in the 1-2 OFDM symbols for each CORESET with wider frequency bandwidth (e.g., frequency diversity) among multiple carriers, which is more efficient for URLLC cases (e.g., urgent PDSCH / PUSCH scheduling) .
[0101] Some UE configured with single BWP / Carrier, some UE configured with multiple BWP / Carriers. In order to compatible with new CORESET with multiple carrier / BWP and legacy COSESET with single carrier / BWP, how to multiplex the UEs is to be considered.
[0102] In view of the above discussions, some embodiments of the present disclosure provide a solution for control signal monitoring. In one aspect of the solution of the present disclosure, a UE receives a configuration of a search space from a base station. The search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers, or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers. The UE monitors a control signal based on the search space. The control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE.
[0103] In this way, the UE may perform control signal monitoring with multiple frequency bands or multiple frequency carriers. Thus the efficiency for the communications is improved. Principles and implementations of embodiments of the present disclosure will be described in detail below with reference to FIGS. 2-13.
[0104] FIG. 2 illustrates an example signaling chart illustrating an example process that supports control signal monitoring in accordance with aspects of the present disclosure. The process 200 may involve the UE 201 and the BS 202. It would be appreciated that although the process 200 is applied in the communication environment 100A of FIG. 1A, this process may be likewise applied to other communication scenarios with similar issues.
[0105] In the process 200, the BS 202 transmits 210, to the UE 201, a configuration of a search space 215. Correspondingly, the UE 201 receives 220 the configuration of the search space 215.
[0106] The search space may be associated with multiple CORESETs, for example, a CORESET combination as shown in FIG. 3. One of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers. For example, each CORESET may be associated with one or more BWPs or carriers.
[0107] The search space may also be associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers. For example, each CORESET may be associated with frequency bands from multiple BWPs or carriers.
[0108] In other words, the UE 201 may be configured with a search space, and the search space may be associated with a CORESET as legacy or multiple CORESETs.
[0109] Continue to refer to FIG. 2, the BS 202 transmits 225 a control signal 230 based on the search space to the UE 201. The control signal 230 comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE.
[0110] If the search space is associated with multiple CORESETs, the definitions of the REGs, CCE and the mapping between REGs and the CCE in each CORESET may follow as legacy. Each CORESET consists of multiple resource blocks (PRBs) in the frequency domain and one or more symbols in the time domain. Each CORESET is associated with one CCE-to-REG mapping (i.e., the mapping between REGs and the CCE) , for example, interleaving mapping, non-interleaving mapping.
[0111] In addition, a CCE may consist of 6 REGs where a REG equals one resource block during one OFDM symbol.
[0112] As shown in FIG. 4, REGs (e.g., REG i) within each CORESET are numbered in increasing order in a time-first manner, starting with 0 for the first OFDM symbol and the lowest-numbered resource block in the CORESET.
[0113] REG bundle i is defined as REGs {iL, iL+1, ..., iL+L-1} , where L is the REG bundle size. CCE j consists of REG bundles {f (6j / L) , f (6j / L+1) , ..., f (6j / L+6 / L-1) } , where f (·) is an inter-leaver.
[0114] For non-interleaved CCE-to-REG mapping, L=6 and f (x) =x.
[0115] The scheme is designed to be compatible with the legacy UE with single CORESET configuration / monitoring for each BWP.
[0116] In some embodiments, the BS 202 may further determine an index or indexes of the CCE based on the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, an order for indexing the CCE, or any combination of two or more of above mention items.
[0117] In addition, the order for indexing the CCE may be predefined or preconfigured in a configuration or indicated in the control signal 230.
[0118] For instance, the index of the CCE may be renumbered among the multiple CORESETs based on the frequency band, the index of the CORESET, the index of the BWP / carrier, or based on the predefined order configured by the higher layer.
[0119] In an example, there are CCEs with indexes 0, 1, 2, 3 in CORESET 1 (carrier 1, CCEs with indexes 0, 1, 2, 3, 4, 5, 6, 7 in CORESET A (carrier 2) . The indexes of CCEs in the CORESET 1 and CORESET A may be renumbered as indexes 0, 1, 2, 3 (CORESET 1) , 4, 5, 6, 7, 8, 9, 10, 11 (CORESET A) based on the indexes of carrier 1 and carrier 2.
[0120] As shown in FIG. 5A, the CORESET combination comprises CORESET 1 and CORESET 2 from BWP1 / carrier1 and BWP2 / carrier 2 respectively. A CCE consists of 6 REGs where a REG equals one resource block during one OFDM symbol. The CCE concatenation is based on the indexes of the carriers. The indexes of CCEs in the CORESET 1 and CORESET 2 may be renumbered as indexes 0, 1, 2, 3 (CORESET 1) , 4, 5, 6, 7 (CORESET 2) based on the indexes of BWP1 / carrier1 and BWP2 / carrier 2. The definition of the REG and the CCE and the mapping between REGs and the CCE in each CORESET follow as legacy.
[0121] In another example, in order to evenly distribute the UE PDCCH monitoring (with different starting CCE indexes among UEs) , the UE 201 may be configured with the CORESET catenation among CORESETs based the ascending order of the carriers.
[0122] As shown in FIG. 5B, the CORESET combination comprises CORESET 1 and CORESET 2 from BWP1 / carrier1 and BWP2 / carrier 2 respectively. For example, for some UE, the CCE concatenation may be based on the ascending order of the indexes of the carriers. The indexes of CCEs in the CORESET 1 and CORESET 2 may be renumbered as indexes 0, 1, 2, 3 (CORESET 1) , 4, 5, 6, 7 (CORESET 2) based on the indexes of BWP1 / carrier1 and BWP2 / carrier 2 ascending order. However, for some other UE, the CCE concatenation may be based on the descending order of the indexes of the carriers. The indexes of CCEs in the CORESET 1 and CORESET 2 may be renumbered as indexes 0, 1, 2, 3 (CORESET 2) , 4, 5, 6, 7 (CORESET 1) , based on the indexes of BWP1 / carrier1 and BWP2 / carrier 2 descending order.
[0123] In some embodiments, the BS 202 may further determine an index of a REG among the multiple REGs based on the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, an order for indexing the multiple REG, or any combination of two or more of above mention items.
[0124] In addition, the order for indexing the REG may be predefined or preconfigured in a configuration or indicated in the control signal.
[0125] In other words, the REG numbering enhancement follows the CCE definition and the mapping between REGs and the CCE in each CORESET. The index of the REG may be further numbered among the multiple CORESETs based on the frequency band, the index of the CORESET, the index of the BWP / carrier, or based on the predefined order configured by the higher layer.
[0126] The REGs (e.g., REG i) within each CORESET are numbered in increasing order in a time-first manner, starting with 0 for the first OFDM symbol and the lowest-numbered resource block in the CORESET.
[0127] REG bundle i is defined as REGs {iL, iL+1, ..., iL+L-1} , where L is the REG bundle size. CCE j consists of REG bundles {f (6j / L) , f (6j / L+1) , ..., f (6j / L+6 / L-1) } where f (·) is an inter-leaver.
[0128] For non-interleaved CCE-to-REG mapping, L=6 and f (x) =x.
[0129] The scheme can’ t be compatible with legacy systems or be multiplexed with UE with single CORESET monitoring, but the scheme has full frequency interleaving gain.
[0130] Continue to refer to FIG. 2, the UE 201 monitors 235 the control signal 230 based on the search space. For example, the UE 201 may monitor the PDCCH based on the search space.
[0131] In some embodiments, in order to monitor the control signal 230, the UE 201 may monitor the control signal 230 based on an index or indexes of the CCE. The index or indexes of the CCE may be associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the CCE.
[0132] In an example, the UE 201 may monitor the PDCCH candidates based on the renumbered CCE index among the CORESET combination (e.g., CORESET 1 and CORESET A) .
[0133] As shown in the FIG. 6, the CCEs among multiple CORESETs may be renumbered with indexes 0-15. The UE 201 may monitor PDCCH candidate 0= {0, 1, 2, 3, 4, 5, 6, 7} when AL is 8. The UE 201 may monitor PDCCH candidate 0= {0, 1, 2, 3} and candidate 1= {8, 9, 10, 11} when AL is 4. The UE 201 may monitor PDCCH candidate 0= {0, 1} , candidate 1= {4, 5} and candidate 2= {8, 9} when AL is 2.
[0134] Alternatively or additionally, in order to monitor the control signal 230, the UE 201 may monitor the control signal 230 based on an index of a REG among the multiple REGs. The index of the REG may be associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the REG.
[0135] In some embodiments, if the search space is associated with the multiple CORESETs, the BS 202 may further determine the mapping between REGs and the CCE for the control signal based on a predefined value of a REG bundle size for the mapping between REGs and the CCE among the multiple CORESETs.
[0136] For instance, the mapping between REGs and the CCE may follow a default or preconfigured configuration, e.g., default configuration, following configuration of the lowest CORESET index. In addition, the REG bundle size and the interleaving size may follow a default value.
[0137] Alternatively or additionally, the BS 202 may determine the mapping between REGs and the CCE for the control signal based on an LCM value of a REG bundle size among the multiple CORESETs.
[0138] For example, the REG bundle size and the interleaving size may equal to the LCM among the multiple CORESETs.
[0139] As shown in FIG. 7, the UE 201 may be configured with the CORESET combination comprising CORESET 1 and CORESET 2 from BWP1 / carrier1 and BWP2 / carrier 2 respectively. The REG bundle size equals to the LCM among the CORESET 1 and CORESET 2, where the LCM equals to 6.
[0140] In addition, the BS 202 may determine the mapping between REGs and the CCE for the control signal based on a predefined mapping comprising non-interleaving mapping. In other words, the mapping between REGs and the CCE may be the non-interleaving mapping by default.
[0141] In order to align the information element (IE) size (i.e., 45bits) with legacy, the frequency domain resource may be configured by a bitmap indication. In some embodiments, if the search space is associated with one CORESET, the BS 202 may further transmit, to the UE 201, a bitmap indication indicating frequency domain resource of the one CORESET. At least one of length, or granularity of the bitmap indication may be associated with the number of the multiple frequency bands or the multiple frequency carriers.
[0142] Due to the bitmap length is fixed as 45 bits, the granularity or length is scaled by the number of carriers or BWPs. The bitmap may also be adopted to all BWP / carrier number. For example, if the UE is configured with a CORESET associated with two carriers, the bitmap length is also fixed as 45 bits, each bit is associated with 12 PRBs instead of legacy NR 6 PRBs.
[0143] The bitmap indication may be defined as follows:
[0144] The CORESET contains a symbol number calculated as 6 multiplied by n, where n represents the number of the BWPs / carriers. The symbol number of each BWP / carrier is consistent across all BWPs / carriers in the CORESET.
[0145] The mapping between REGs and the CCE may include the full interleaving, partial interleaving and non-interleaving. The full interleaving, partial interleaving or non-interleaving may be configured by the CORESET configuration, or configured in the CORESET.
[0146] In some embodiments, if the search space is associated with one CORESET, the BS 202 may determine the mapping between REGs and the CCE by performing full interleaving among the multiple frequency bands or among the multiple frequency carriers.
[0147] For the full interleaving, the mapping between REGs and the CCE may be performed by interleaving among all concatenated REG bundles from all frequency bands / carriers.
[0148] As shown in FIG. 8, the UE 201 is configured with a search space, and the search space is associated with a CORESETs 1 and 2, and the CORESETs 1 and 2 are associated with 2 non-continuous frequency bands from BWP1 / carrier1 and BWP2 / carrier2 respectively. The full interleaving is performed among all concatenated REG bundles from the BWP1 / carrier1 and BWP2 / carrier2.
[0149] In some alternative embodiments, if the search space is associated with one CORESET, the BS 202 may determine the mapping between REGs and the CCE by performing partial interleaving within a sub-band of the multiple frequency bands or the multiple frequency carriers. Sub-band definition is associated with the carrier or BWP configuration. As shown in FIG. 9, the UE 201 is configured with a search space, and the search space is associated with a CORESETs 1 and 2, and the CORESET 1 and 2 are associated with 2 non-continuous frequency bands from BWP1 / carrier1 and BWP2 / carrier2 respectively. REGs 0-23 are associated with carrier 1 and make up REG bundles 1-3. REGs 24-47 are associate with carrier 2 and make up REG bundles 4-7. The partial interleaving is performed separately within REG bundles 1-3 and REG bundles 4-7.
[0150] In some alternative embodiments, if the search space is associated with one CORESET, the BS 202 may determine the mapping between REGs and the CCE by performing non-interleaving among the multiple frequency bands or the multiple frequency carriers.
[0151] For example, the CORESET may be divided into several sub-bands in frequency, the mapping between REGs and the CCE with interleaving or non-interleaving is adopted within each sub band.
[0152]
[0153] In addition, the BS 202 may further determine the sub-band by dividing the CORESET in frequency based on the configuration 215
[0154] Additionally, the UE 201 may further determine the sub-band by dividing the CORESET in frequency based on the configuration 215.
[0155] FIG. 10 illustrates an example of a device 1000 that supports control signal monitoring in accordance with aspects of the present disclosure. The device 1000 may be an example of a network entity 102 or a UE 104 as described herein. The device 1000 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 1000 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 1002, a memory 1004, a transceiver 1006, and, optionally, an I / O controller 1008. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0156] The processor 1002, the memory 1004, the transceiver 1006, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 1002, the memory 1004, the transceiver 1006, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0157] In some implementations, the processor 1002, the memory 1004, the transceiver 1006, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 1002 and the memory 1004 coupled with the processor 1002 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 1002, instructions stored in the memory 1004) .
[0158] For example, the processor 1002 may support wireless communication at the device 1000 in accordance with examples as disclosed herein. The processor 1002 may be configured to operable to support a means for receiving, via the transceiver from a base station, a configuration of a search space, wherein the search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; and means for monitoring a control signal based on the search space, wherein the control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE. The processor 1002 may be configured to operable to support other means for other implementations of method 1200.
[0159] For example, the processor 1002 may support wireless communication at the device 1000 in accordance with examples as disclosed herein. The processor 1002 may be configured to operable to support a means for transmitting, via the transceiver to a user equipment (UE) , a configuration of a search space, wherein the search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; and means for transmitting a control signal based on the search space, wherein the control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE. The processor 1002 may be configured to operable to support other means for other implementations of method 1300.
[0160] The processor 1002 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 1002 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 1002. The processor 1002 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1004) to cause the device 1000 to perform various functions of the present disclosure.
[0161] The memory 1004 may include random access memory (RAM) and read-only memory (ROM) . The memory 1004 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1002 cause the device 1000 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 1002 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 1004 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0162] The I / O controller 1008 may manage input and output signals for the device 1000. The I / O controller 1008 may also manage peripherals not integrated into the device M02. In some implementations, the I / O controller 1008 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 1008 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 1008 may be implemented as part of a processor, such as the processor 1006. In some implementations, a user may interact with the device 1000 via the I / O controller 1008 or via hardware components controlled by the I / O controller 1008.
[0163] In some implementations, the device 1000 may include a single antenna 1010. However, in some other implementations, the device 1000 may have more than one antenna 1010 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1006 may communicate bi-directionally, via the one or more antennas 1010, wired, or wireless links as described herein. For example, the transceiver 1006 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1006 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1010 for transmission, and to demodulate packets received from the one or more antennas 1010. The transceiver 1006 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0164] A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 1010 for transmitting the amplified signal into the air or wireless medium.
[0165] A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 1010 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0166] FIG. 11 illustrates an example of a processor 1100 that supports control signal monitoring in accordance with aspects of the present disclosure. The processor 1100 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 1100 may include a controller 1102 configured to perform various operations in accordance with examples as described herein. The processor 1100 may optionally include at least one memory 1104. Additionally, or alternatively, the processor 1100 may optionally include one or more arithmetic-logic units (ALUs) 1100. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0167] The processor 1100 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 1100) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0168] The controller 1102 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 1100 to cause the processor 1100 to support various operations in accordance with examples as described herein. For example, the controller 1102 may operate as a control unit of the processor 1100, generating control signals that manage the operation of various components of the processor 1100. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0169] The controller 1102 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 1104 and determine subsequent instruction (s) to be executed to cause the processor 1100 to support various operations in accordance with examples as described herein. The controller 1102 may be configured to track memory address of instructions associated with the memory 1104. The controller 1102 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 1102 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 1100 to cause the processor 1100 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 1102 may be configured to manage flow of data within the processor 1100. The controller 1102 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 1100.
[0170] The memory 1104 may include one or more caches (e.g., memory local to or included in the processor 1100 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 1104 may reside within or on a processor chipset (e.g., local to the processor 1100) . In some other implementations, the memory 1104 may reside external to the processor chipset (e.g., remote to the processor 1100) .
[0171] The memory 1104 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1100, cause the processor 1100 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 1102 and / or the processor 1100 may be configured to execute computer-readable instructions stored in the memory 1104 to cause the processor 1100 to perform various functions (e.g., functions or tasks supporting transmit power prioritization ) . For example, the processor 1100 and / or the controller 1102 may be coupled with or to the memory 1104, the processor 1100, the controller 1102, and the memory 1104 may be configured to perform various functions described herein. In some examples, the processor 1100 may include multiple processors and the memory 1104 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0172] The one or more ALUs 1100 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 1100 may reside within or on a processor chipset (e.g., the processor 1100) . In some other implementations, the one or more ALUs 1100 may reside external to the processor chipset (e.g., the processor 1100) . One or more ALUs 1100 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 1100 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 1100 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 1100 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 1100 to handle conditional operations, comparisons, and bitwise operations.
[0173] The processor 1100 may support wireless communication in accordance with examples as disclosed herein. The processor 1102 may be configured to or operable to support a means for receiving, from a base station, a configuration of a search space, wherein the search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; and means for monitoring a control signal based on the search space, wherein the control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE. . The processor 1100 may be configured to or operable to support other means for other implementations of method 1200.
[0174] The processor 1100 may support wireless communication in accordance with examples as disclosed herein. The processor 1102 may be configured to or operable to support a means for transmitting, to a user equipment (UE) , a configuration of a search space, wherein the search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; and means for transmitting a control signal based on the search space, wherein the control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE. . The processor 1100 may be configured to or operable to support other means for other implementations of method 1300.
[0175] FIG. 12 illustrates a flowchart of a method 1200 that supports control signal monitoring in accordance with aspects of the present disclosure. The operations of the method 1200 may be implemented by a device or its components as described herein. For example, the operations of the method 1200 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0176] At 1205, the method may include receiving, from a base station, a configuration of a search space, wherein the search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers. The operations of 1205 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1205 may be performed by a device as described with reference to FIG. 1A.
[0177] At 1210, the method may include monitoring a control signal based on the search space, wherein the control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE. The operations of 1210 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1210 may be performed by a device as described with reference to FIG. 1A.
[0178] In some embodiments, the method may further include monitoring the control signal by: monitoring the control signal based on an index or indexes of the CCE, wherein the index or indexes of the CCE are associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the CCE.
[0179] In some embodiments, the order for indexing the CCE may be predefined or preconfigured in a configuration or indicated in the control signal.
[0180] In some embodiments, the method may further include monitoring the control signal by: monitoring the control signal based on an index of a REG among the multiple REGs, wherein the index of the REG is associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the REG.
[0181] In some embodiments, the order for indexing the REG may be predefined or preconfigured in a configuration or indicated in the control signal.
[0182] In some embodiments, the search space is associated with the multiple CORESETs, and the mapping between REGs and the CCE for the control signal may be associated with one of the following: a predefined value of a REG bundle size for the mapping between REGs and the CCE among the multiple CORESETs; an LCM value of a REG bundle size among the multiple CORESETs; or a predefined mapping comprising non-interleave mapping.
[0183] In some embodiments, the search space is associated with the one CORESET, and the method may further include receiving, from a base station, a bitmap indication indicating frequency domain resource of the one CORESET, wherein at least one of length, or granularity of the bitmap indication is associated with a number of the multiple frequency bands or the multiple frequency carriers.
[0184] In some embodiments, the search space is associated with one CORESET, and the mapping between REGs and the CCE may be associated with one of the following: full interleaving among the multiple frequency bands or among the multiple frequency carriers; partial interleaving within a sub-band of the multiple frequency bands or the multiple frequency carriers; or non-interleaving among the multiple frequency bands or the multiple frequency carriers.
[0185] In some embodiments, the method may further include determining the sub-band by dividing the CORESET in frequency based on the configuration.
[0186] FIG. 13 illustrates a flowchart of a method 1300 that supports control signal monitoring in accordance with aspects of the present disclosure. The operations of the method 1300 may be implemented by a device or its components as described herein. For example, the operations of the method 1300 may be performed by a network entity 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0187] At 1305, the method may include transmitting, to a user equipment (UE) , a configuration of a search space, wherein the search space is associated with multiple CORESETs, and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; or the search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers. The operations of 1305 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1305 may be performed by a device as described with reference to FIG. 1A.
[0188] At 1310, the method may include transmitting, to the UE, a control signal based on the search space, wherein the control signal comprises one or more CCEs, and a CCE of the one or more CCEs comprises multiple REGs based on mapping between REGs and the CCE. The operations of 1310 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1310 may be performed by a device as described with reference to FIG. 1A.
[0189] In some embodiments, the method may further include determining an index or indexes of the CCE based on at least one of the following: the one or more frequency bands; indexes of the multiple CORESETs; indexes of the one or more frequency bands; indexes of the one or more frequency carriers; or an order for indexing the CCE.
[0190] In some embodiments, the order for indexing the CCE may be predefined or preconfigured in a configuration or indicated in the control signal.
[0191] In some embodiments, the method may further include determining an index of a REG among the multiple REGs based on at least one of the following: the one or more frequency bands; indexes of the multiple CORESETs; indexes of the one or more frequency bands; indexes of the one or more frequency carriers; or an order for indexing the c multiple REG.
[0192] In some embodiments, the order for indexing the REG may be predefined or preconfigured in a configuration or indicated in the control signal.
[0193] In some embodiments, the search space is associated with the multiple CORESETs, and the method may further include determining the mapping between REGs and the CCE for the control signal based on one of the following: a predefined value of a REG bundle size for the mapping between REGs and the CCE among the multiple CORESETs; an LCM value of a REG bundle size among the multiple CORESETs; or a predefined mapping comprising non-interleave mapping.
[0194] In some embodiments, the search space is associated with the one CORESET, and the method may further include transmitting, to the UE, a bitmap indication indicating frequency domain resource of the one CORESET, wherein at least one of length, or granularity of the bitmap indication is associated with a number of the multiple frequency bands or the multiple frequency carriers.
[0195] In some embodiments, the search space is associated with one CORESET, and the method may further include determining the mapping between REGs and the CCE by one of the following: performing full interleaving among the multiple frequency bands or among the multiple frequency carriers; performing partial interleaving within a sub-band of the multiple frequency bands or the multiple frequency carriers; or performing non-interleaving among the multiple frequency bands or the multiple frequency carriers.
[0196] In some embodiments, the method may further include determining the sub-band by dividing the CORESET in frequency based on the configuration.
[0197] It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0198] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0199] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0200] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
[0201] As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0202] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, via the transceiver from a base station, a configuration of a search space, whereinthe search space is associated with multiple control resource sets (CORESETs) , and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; orthe search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; andmonitor a control signal based on the search space, wherein the control signal comprises one or more control channel elements (CCEs) , and a CCE of the one or more CCEs comprises multiple resource element groups (REGs) based on mapping between REGs and the CCE.2.The UE of claim 1, wherein the processor is configured to monitor the control signal by:monitoring the control signal based on an index or indexes of the CCE, wherein the index or indexes of the CCE are associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the CCE.3.The UE of claim 2, wherein the order for indexing the CCE is predefined or preconfigured in a configuration or indicated in the control signal.4.The UE of claim 1, wherein the processor is configured to monitor the control signal by:monitoring the control signal based on an index of a REG among the multiple REGs, wherein the index of the REG is associated with at least one of the one or more frequency bands, indexes of the multiple CORESETs, indexes of the one or more frequency bands, indexes of the one or more frequency carriers, or an order for indexing the REG.5.The UE of claim 4, wherein the order for indexing the REG is predefined or preconfigured in a configuration or indicated in the control signal.6.The UE of claim 1, wherein the search space is associated with the multiple CORESETs, and the mapping between REGs and the CCE for the control signal is associated with one of the following:a predefined value of a REG bundle size for the mapping between REGs and the CCE among the multiple CORESETs;at least common multiple (LCM) value of a REG bundle size among the multiple CORESETs; ora predefined mapping comprising non-interleave mapping.7.The UE of claim 1, wherein the search space is associated with the one CORESET, and the processor is further configured to:receive, via the transceiver from a base station, a bitmap indication indicating frequency domain resource of the one CORESET, wherein at least one of length, or granularity of the bitmap indication is associated with a number of the multiple frequency bands or the multiple frequency carriers.8.The UE of claim 1, wherein the search space is associated with one CORESET, and the mapping between REGs and the CCE is associated with one of the following:full interleaving among the multiple frequency bands or among the multiple frequency carriers;partial interleaving within a sub-band of the multiple frequency bands or the multiple frequency carriers; ornon-interleaving among the multiple frequency bands or the multiple frequency carriers.9.The UE of claim 8, wherein the processor is further configured todetermine the sub-band by dividing the CORESET in frequency based on the configuration.10.A base station comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:transmit, via the transceiver to a user equipment (UE) , a configuration of a search space, whereinthe search space is associated with multiple control resource sets (CORESETs) , and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; orthe search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; andtransmit, to the UE, a control signal based on the search space, wherein the control signal comprises one or more control channel elements (CCEs) , and a CCE of the one or more CCEs comprises multiple resource element groups (REGs) based on mapping between REGs and the CCE.11.The base station of claim 10, wherein the processor is further configured to:determine an index or indexes of the CCE based on at least one of the following:the one or more frequency bands;indexes of the multiple CORESETs;indexes of the one or more frequency bands;indexes of the one or more frequency carriers; oran order for indexing the CCE.12.The base station of claim 11, wherein the order for indexing the CCE is predefined or preconfigured in a configuration or indicated in the control signal.13.The base station of claim 10, wherein the processor is further configured to:determine an index of a REG among the multiple REGs based on at least one of the following:the one or more frequency bands;indexes of the multiple CORESETs;indexes of the one or more frequency bands;indexes of the one or more frequency carriers; oran order for indexing the c multiple REG.14.The base station of claim 13, wherein the order for indexing the REG is predefined or preconfigured in a configuration or indicated in the control signal.15.The base station of claim 10, wherein the search space is associated with the multiple CORESETs, and the processor is further configured to:determine the mapping between REGs and the CCE for the control signal based on one of the following:a predefined value of a REG bundle size for the mapping between REGs and the CCE among the multiple CORESETs;a least common multiple (LCM) value of a REG bundle size among the multiple CORESETs; ora predefined mapping comprising non-interleave mapping.16.The base station of claim 10, wherein the search space is associated with the one CORESET, and the processor is further configured to:transmit, via the transceiver to the UE, a bitmap indication indicating frequency domain resource of the one CORESET, wherein at least one of length, or granularity of the bitmap indication is associated with a number of the multiple frequency bands or the multiple frequency carriers.17.The base station of claim 10, wherein the search space is associated with one CORESET, and the processor is further configured to:determine the mapping between REGs and the CCE by one of the following :performing full interleaving among the multiple frequency bands or among the multiple frequency carriers;performing partial interleaving within a sub-band of the multiple frequency bands or the multiple frequency carriers; orperforming non-interleaving among the multiple frequency bands or the multiple frequency carriers.18.The base station of claim 17, wherein the processor is further configured to:determine the sub-band by dividing the CORESET in frequency based on the configuration.19.A method performed by a user equipment (UE) , the method comprising:receiving, from a base station, a configuration of a search space, whereinthe search space is associated with multiple control resource sets (CORESETs) , and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; orthe search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; andmonitoring a control signal based on the search space, wherein the control signal comprises one or more control channel elements (CCEs) , and a CCE of the one or more CCEs comprises multiple resource element groups (REGs) based on mapping between REGs and the CCE.20.A method performed by a base station, the method comprising:transmitting, to a user equipment (UE) , a configuration of a search space, whereinthe search space is associated with multiple control resource sets (CORESETs) , and one of the multiple CORESETs is associated with one or more frequency bands or one or more frequency carriers; orthe search space is associated with one CORESET, and the one CORESET is associated with multiple frequency bands or multiple frequency carriers; andtransmitting, to the UE, a control signal based on the search space, wherein the control signal comprises one or more control channel elements (CCEs) , and a CCE of the one or more CCEs comprises multiple resource element groups (REGs) based on mapping between REGs and the CCE.