Method and apparatus for control signaling for improved resource utilization

Abstract

Methods and apparatuses for PDCCH reception and transmission. A method for PDCCH reception includes transmitting the ability to receive PDCCH on a downlink (DL) cell. When any two PDCCH receptions are respectively: within Y1 or Y2 symbols or having a first symbol separated by at least X1 or X2 symbols, the PDCCH reception on the DL cell is according to (X1, Y1) or (X2, Y2). The method further includes: determining whether the PDCCH reception is according to (X2, Y2); and, when the PDCCH reception is not according to (X2, Y2), receiving the maximum number of PDCCH within Y1 symbols on the DL cell, and when the PDCCH reception is according to (X2, Y2), receiving the maximum number of PDCCH within Y2 symbols on the DL cell.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly to enhancing resource efficiency of communications between a base station and a user equipment (UE). Background Art

[0002] In order to meet the demand for wireless data services that has increased since the deployment of 4G (fourth generation) communication systems, efforts have been made to develop improved 5G (fifth generation) or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "beyond 4G networks" or "post-LTE systems."

[0003] 5G communication systems are considered to be implemented in higher frequency (mmWave) bands, such as the 60 GHz band, in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G communication systems.

[0004] In addition, in the 5G communication system, development is underway for system network improvements based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), and receiving-end interference cancellation.

[0005] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies.

[0006] The fifth generation (5G) or new radio (NR) mobile communications, which are expected to be commercialized for the first time around 2020, have recently gained increasing momentum with all the global technical activities from industry and academia on various candidate technologies. Candidate enablers of 5G / NR mobile communications include: massive antenna technology from traditional cellular bands up to high frequencies to provide beamforming gain and support increased capacity, new waveforms (e.g., new radio access technologies (RATs)) to flexibly accommodate various services / applications with different requirements, new multiple access schemes to support massive connectivity, etc. Summary of the invention

[0007]

Technical issues

[0008] Various embodiments of the present disclosure provide control signaling designs for improved resource utilization control.

[0009] [Solution to the problem]

[0010] In one embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to send a signal for receiving a signal according to a first pair (X 1 ,Y 1 ) symbol and the second pair (X 2 ,Y 2 ) symbol on the downlink (DL) cell to receive the physical downlink control channel (PDCCH). When any two PDCCHs are received: 1 or Y 2 symbols or have at least X 1 or X 2 When the first symbol is separated by 100 symbols, the PDCCH reception on the DL cell is based on (X 1 ,Y 1 ) or (X 2 ,Y 2 )of. Y 1 ≤X 1 , Y 2 ≤X 2 , and X 1 <X 2 According to (X 1 ,Y 1 ) in Y 1 The first maximum number of PDCCH receptions within symbols Less than (X 2 ,Y 2 ) in Y 2 The second maximum number of PDCCH receptions within symbols The UE further comprises a processor operatively connected to the transceiver, the processor being configured to determine whether PDCCH reception is in accordance with (X 2 ,Y 2 The transceiver is further configured to: when the PDCCH reception is not based on (X 2 ,Y 2 ), the DL cell receives the signal at Y 1 Maximum number of symbols PDCCH, and when PDCCH reception is based on (X 2 ,Y 2 ), the DL cell receives the signal at Y 2 Maximum number of symbols PDCCH.

[0011] In another embodiment, a base station is provided. The base station includes a transceiver, the transceiver being configured to: receive from a user equipment (UE) a signal for receiving a signal according to a first pair (X 1 ,Y 1 ) symbol and the second pair (X 2 ,Y 2 ) symbol on the downlink (DL) cell to transmit the physical downlink control channel (PDCCH). When any two PDCCHs are transmitted: 1 or Y 2 symbols or have at least X 1 or X 2 When the first symbol is separated by 100 symbols, the PDCCH transmission on the DL cell is based on (X 1 ,Y 1 ) or (X 2 ,Y 2 )of. Y 1 ≤X 1 , Y 2 ≤X 2 , and X 1 <X 2 According to (X 1 ,Y 1 ) in Y 1 The first maximum number of PDCCH transmissions within a symbol Less than (X 2 ,Y 2 ) in Y 2 The second maximum number of PDCCH transmissions within a symbol The base station further comprises a processor operatively connected to the transceiver. The processor is configured to determine whether the PDCCH transmission is in accordance with (X 2 ,Y 2 The transceiver is further configured to: when the PDCCH reception is not based on (X 2 ,Y 2 ), in the DL cell, sends to the UE a signal at Y 1 Maximum number of symbols PDCCH, and when PDCCH reception is based on (X 2 ,Y 2 ), in the DL cell, sends to the UE a signal at Y 2 Maximum number of symbols PDCCH.

[0012] In yet another embodiment, a method for receiving a PDCCH is provided. The method includes sending a signal for receiving a PDCCH according to a first pair (X 1 ,Y1 ) The ability to receive a Physical Downlink Control Channel (PDCCH) on a downlink (DL) cell for a first pair of (X 2 , Y 2 ) symbols and a second pair of (X 1 or Y 2 ) symbols. When any two PDCCH receptions are respectively: within Y 1 or Y 2 symbols or have a first symbol separated by at least X 1 or X 1 symbols, the PDCCH reception on the DL cell is in accordance with (X 2 , Y 2 ) or (X 1 , Y 1 ), where Y 2 ≤ X 2 , Y 1 < X 2 . The first maximum number of PDCCH receptions within Y 1 , Y 1 symbols in accordance with (X 1 ) is less than the second maximum number of PDCCH receptions within Y symbols in accordance with (X 2 , Y 2 ). The method further includes determining whether the PDCCH reception is in accordance with (X 2 , Y 2 ); and: when the PDCCH reception is not in accordance with (X 2 , Y 2 ), receiving the maximum number of PDCCHs within Y 2 symbols on the DL cell, and when the PDCCH reception is in accordance with (X 1 , Y 2 ), receiving the maximum number of PDCCHs within Y 2 symbols on the DL cell.

[0013] In another embodiment, a method for transmitting a PDCCH is provided. The method includes: receiving from a User Equipment (UE) the ability to transmit a Physical Downlink Control Channel (PDCCH) on a downlink (DL) cell for a first pair of (X 2 , Y 1 ) symbols and a second pair of (X 1 , Y 2 ) symbols. When any two PDCCH transmissions are respectively: within Y 2 or Y 1 symbols or have a first symbol separated by at least X 2 or X2 within a symbol or having a first symbol separated by at least X 1 or X 2 symbols, PDCCH transmission on the DL cell is according to (X 1 , Y 1 ). Or (X 2 , Y 2 ). Y 1 ≤ X 1 , Y 2 ≤ X 2 , and X 1 < X 2 . The first maximum number of PDCCH receptions within Y 1 , Y 1 symbols according to (X 1 is less than the second maximum number of PDCCH receptions within Y symbols according to (X 2 , Y 2 ). The method further includes determining whether PDCCH transmission is according to (X 2 , Y 2 ); and: when PDCCH reception is not according to (X 2 , Y 2 ), in the DL cell, sending to the UE the maximum number of PDCCHs within Y 2 symbols, and when PDCCH reception is according to (X 1 , Y 2 ), in the DL cell, sending to the UE the maximum number of PDCCHs within Y 2 symbols. 2 The maximum number of PDCCHs within Y

[0014] According to the following drawings, description and claims, other technical features may be obvious to those skilled in the art.

[0015] Before proceeding to the following "Specific embodiments", it may be advantageous to set forth the definitions of certain words and phrases used throughout this patent document. The term "coupling" and its derivatives refer to any direct element or indirect communication between two or more elements, regardless of whether those elements are in physical contact with each other. The terms "send", "receive" and "communication" and their derivatives include both direct and indirect communication. The terms "include" and "comprise" and their derivatives mean including but not limited to. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives mean: including, included in, interconnected with, including, included in, connected to or connected with, coupled to or coupled with, communicate with, cooperate with, interlace, juxtapose, approach, bound to, or bound with, have, have the nature of, be related to, or have a connection with. The term "controller" refers to any device, system, or part thereof that controls at least one operation. Such a controller can be implemented in hardware, or can be implemented in a combination of hardware and software and / or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and only one item in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0016] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or a part thereof that are suitable for being implemented in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD) or any other type of memory, etc. "Non-transitory" computer-readable medium does not include wired, wireless, optical or other communication links that convey temporary electrical signals or other signals. Non-transitory computer-readable media include media that can permanently store data and media that can store and later overwrite write data, such as rewritable optical discs or erasable memory devices.

[0017] Definitions for certain other words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, but not most instances, such definitions apply to prior and future uses of such defined words and phrases. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0019] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0020] Figure 2 An example gNB according to an embodiment of the present disclosure is shown;

[0021] Figure 3 An example UE according to an embodiment of the present disclosure is shown;

[0022] Figure 4a shows an example DL slot structure according to an embodiment of the present disclosure;

[0023] Figure 4b shows an example DL slot structure according to an embodiment of the present disclosure;

[0024] Figure 5a An example transmitter structure using OFDM according to an embodiment of the present disclosure is shown;

[0025] Figure 5b An example receiver structure using OFDM according to an embodiment of the present disclosure is shown;

[0026] Figure 6 A flow chart showing a UE process for a search space set according to an embodiment of the present disclosure is shown;

[0027] Figure 7 A flowchart of a UE process for determining a cell for PUCCH transmission according to an embodiment of the present disclosure is shown;

[0028] Figure 8a A flowchart of a UE process for determining PDCCH candidates according to an embodiment of the present disclosure is shown;

[0029] Figure 8b An example for determining PDCCH candidates according to an embodiment of the present disclosure is shown; and,

[0030] Fig. 9 A flow chart of a UE process for determining a value of a parameter set according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0031] In order to facilitate those skilled in the art to better understand the technical solution of the embodiment, the technical solution of the embodiment will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment.

[0032] Some processes described in the specification, claims, and drawings may include multiple operations described in a certain order. However, it should be understood that these operations may be run in an order other than the order in which they are described herein; or run in parallel. Reference numerals such as 101 and 102 indicating operations are used only to distinguish different operations, and the reference numerals themselves do not indicate any order of operation. In addition, these processes may include more or fewer operations, and these operations may be run sequentially or in parallel. It should be noted that words such as "first" and "second" are used to distinguish different messages, devices, modules, etc., which neither indicate any order nor define different types.

[0033] The technical solutions of the embodiments will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described here are only some embodiments of the present disclosure, rather than all embodiments of the present disclosure. Any other embodiments obtained by those skilled in the art without any creative work will fall within the protection scope of the present disclosure.

[0034] Each block of the flowchart diagram and the combination of blocks in the flowchart diagram can be implemented by computer program instructions. The computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device implement the functions specified in one or more flowchart blocks. These computer program instructions can also be stored in a computer-usable memory or a computer-readable memory, which can guide the computer or other programmable data processing device to act in a specific manner, so that the instructions stored in the computer-usable or computer-readable memory produce an article of manufacture including instructions for implementing the functions specified in one or more flowchart blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions running on the computer or other programmable device provide steps for implementing the functions specified in one or more flowchart blocks.

[0035] Each block of the flowchart diagram may represent a module, code segment or code portion of a code, and the code includes one or more executable instructions for implementing the specified logical function. In some alternative embodiments, the functions indicated in the block may occur in different orders. For example, depending on the functionality involved, two blocks shown in succession may actually run substantially simultaneously, or the blocks may sometimes run in reverse order.

[0036] Here, the term "unit" may indicate a software or hardware component, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), and the "unit" performs any function. However, a "unit" or "module" is not limited to software or hardware. A "unit" or "module" may be constructed to be stored in an addressable storage medium or to run one or more processors. Therefore, a "unit" or "module" may include, for example, software elements, object-oriented software elements, class elements or task elements, processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays, and parameters. The elements and functions provided by a "unit" or "module" may be combined into a smaller number of elements, "units" or "modules" or divided into a larger number of elements, "units" or "modules". These elements, "units" and / or "modules" may be implemented to reproduce one or more central processing units (CPUs) in a device or a secure multimedia card.

[0037] Although the embodiments of the present disclosure are described below with reference to a 3GPP-based wireless communication system, the present disclosure is also applicable to other communication systems and services having similar technical backgrounds.

[0038] Discussed below Figures 1 to 9 The various embodiments used to describe the principles of the present disclosure in this patent document are only for illustration and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged system or device.

[0039] The following documents are hereby incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 38.211 v15.6.0, "NR; Physical Channels and Modulation"; 3GPP TS 38.212 v15.6.0, "NR; Multiplexing and Channel Coding"; 3GPP TS 38.213 v15.6.0, "NR; Physical Layer Procedures for Control"; 3GPP TS 38.214 v15.6.0, "NR; Physical Layer Procedures for Data"; 3GPP TS 38.321 v15.6.0, "NR; Medium Access Control (MAC) Protocol Standard"; and 3GPP TS 38.331 v15.6.0, "NR; Radio Resource Control (RRC) Protocol Standard".

[0040] The following Figure 1-3 Various embodiments are described that are implemented in a wireless communication system and utilizing Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figure 1-3 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the disclosure may be implemented in any suitably arranged communications system.

[0041] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network shown is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0042] like Figure 1 As shown, the wireless network includes gNB 101 (e.g., base station BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0043] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs include: UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); and UE 116, which may be a mobile device (M), such as a cell phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G / NR, LTE, LTE-A, WiMAX, WiFi, or other wireless communication technologies.

[0044] Depending on the network type, the term "base station" or "BS" can refer to any component (or set of components) configured to provide wireless access to the network, such as a transmission point (TP), a transmission reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a WiFi access point (AP), or other wireless-enabled devices. The base station can provide wireless access in accordance with one or more wireless communication protocols such as 5G / NR 3GPP new radio interface / access (NR), long term evolution (LTE), advanced LTE (LTE-A), high speed packet access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, the term "user equipment" or "UE" can refer to any component such as "mobile station", "user station", "remote terminal", "wireless terminal", "reception point", or "user equipment". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a BS, regardless of whether the UE is a mobile device (such as a mobile phone or smart phone) or is generally considered to be a fixed device (such as a desktop computer or a vending machine).

[0045] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0046] As described in more detail below, one or more of UEs 111-116 include circuitry, programming, or a combination thereof designed for efficient control signaling for improved resource utilization. In certain embodiments, one or more of gNBs 101-103 include circuitry, programming, or a combination thereof designed for efficient control signaling for improved resource utilization.

[0047] although Figure 1 An example of a wireless network is shown, but Figure 1 Various changes may be made. For example, the wireless network can include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 can communicate directly with network 130 and provide the UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 can provide access to other or additional external networks, such as an external telephone network or other types of data networks.

[0048] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The illustrated embodiment of the gNB 102 is for illustration only, and Figure 1 gNB 101 and gNB 103 can have the same or similar configuration. However, gNBs have a variety of configurations, and Figure 2 The scope of this disclosure is not limited to any particular implementation of gNB.

[0049] like Figure 2 As shown, gNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220. gNB 102 also includes a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0050] The RF transceivers 210a-210n receive incoming RF signals from the antennas 205a-205n, such as signals sent by UEs in the network 100. The RF transceivers 210a-210n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuit 220, which generates processed baseband signals by filtering, decoding and / or digitizing the baseband or IF signals. The RX processing circuit 220 sends the processed baseband signals to the controller / processor 225 for further processing.

[0051] The TX processing circuit 215 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from the controller / processor 225. The TX processing circuit 215 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The RF transceivers 210a-210n receive the outgoing processed baseband or IF signals from the TX processing circuit 215 and up-convert these baseband or IF signals to RF signals that are transmitted via the antennas 205a-205n.

[0052] The controller / processor 225 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles. The controller / processor 225 can also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 can support beamforming or directional routing operations, in which outgoing signals from / incoming signals to multiple antennas 205a-205n are weighted differently to effectively direct the outgoing signals in a desired direction. Any of a variety of other functions can be supported by the controller / processor 225 in the gNB 102.

[0053] The controller / processor 225 is also capable of running programs and other processes, such as an OS, that reside in the memory 230. The controller / processor 225 is capable of moving data into or out of the memory 230 as required by the running processes.

[0054] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 235 can support communication via any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), the interface 235 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 can allow the gNB 102 to communicate via a wired or wireless local area network or via a wired or wireless connection to a larger network (such as the Internet). The interface 235 includes any suitable structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver. The memory 230 is coupled to the controller / processor 225. A portion of the memory 230 can include RAM, and another portion of the memory 230 can include flash memory or other ROM.

[0055] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 Make various changes. For example, gNB 102 can include Figure 2 As a specific example, the access point can include multiple interfaces 235, and the controller / processor 225 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of TX processing circuitry 215 and a single instance of RX processing circuitry 220, the gNB 102 can include multiple instances of each (such as one per RF transceiver). Additionally, the components can be combined, further subdivided, or omitted. Figure 2 The various components in the system can be configured and additional components can be added according to specific needs.

[0056] Figure 3 An example UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The illustrated embodiment of UE 116 is for illustration only, and Figure 1 UEs 111-115 can have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of a UE.

[0057] like Figure 3As shown, UE 116 includes antenna 305, radio frequency (RF) transceiver 310, TX processing circuit 315, microphone 320 and receive (RX) processing circuit 325. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface (IF) 345, touch screen 350, display 355 and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0058] RF transceiver 310 receives incoming RF signals from antenna 305 transmitted by a gNB of network 100. RF transceiver 310 downconverts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 325 sends the processed baseband signal to speaker 330 (such as a speaker for voice data) or to processor 340 for further processing (such as for web browsing data).

[0059] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as web data, email, or interactive video game data) from the processor 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The RF transceiver 310 receives the outgoing processed baseband or IF signals from the TX processing circuit 315 and up-converts these baseband or IF signals to RF signals that are transmitted via the antenna 305.

[0060] The processor 340 can include one or more processors or other processing devices and runs an OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceiver 310, the RX processing circuit 325, and the TX processing circuit 315 in accordance with well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0061] The processor 340 is also capable of running other processes and programs resident in the memory 360, such as processes for beam management. The processor 340 is capable of moving data into or out of the memory 360 as required by the running processes. In some embodiments, the processor 340 is configured to run applications 362 based on the OS 361 or in response to signals received from the gNB or operator. The processor 340 is also coupled to an I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0062] Processor 340 is also coupled to touch screen 350 and display 355. An operator of UE 116 can use touch screen 350 to enter data into UE 116. Display 355 may be a liquid crystal display, light emitting diode display, or other display capable of rendering text and / or at least limited graphics, such as from a website.

[0063] Memory 360 is coupled to processor 340. A portion of memory 360 can include random access memory (RAM), and another portion of memory 360 can include flash memory or other read-only memory (ROM).

[0064] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, you can combine, further subdivide or omit Figure 3 , and additional components can be added according to specific needs. As a specific example, processor 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In addition, although Figure 3 The UE 116 is shown configured as a mobile phone or smart phone, but the UE can be configured to operate as other types of mobile or stationary devices.

[0065] In order to meet the demand for wireless data services that have increased since the deployment of 4G communication systems, efforts have been made to develop improved 5G / NR or pre-5G / NR communication systems. Therefore, 5G / NR or pre-5G / NR communication systems are also referred to as "super 4G networks" or "post-LTE systems". 5G / NR communication systems are considered to be implemented in higher frequency (mmWave) bands (e.g., 28 GHz or 60 GHz bands or generally above 6 GHz) to achieve higher data rates, or implemented in lower frequency bands such as below 6 GHz to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G / NR communication systems. In addition, in the 5G / NR communication system, development is underway for system network improvements based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), and receiving-end interference cancellation.

[0066] The communication system includes: DL referring to transmission from a base station or one or more transmission points to a UE; and uplink (UL) referring to transmission from a UE to a base station or to one or more reception points.

[0067] The unit for DL ​​signaling or for UL signaling on a cell is called a time slot; and can include one or more symbols. Symbols can also be used as additional time units. Frequency (or bandwidth (BW)) units are called resource blocks (RBs). One RB includes multiple subcarriers (SCs). For example, a time slot can have a duration of 0.5 milliseconds or 1 millisecond, including 14 symbols, and one RB can include 12 SCs, where the inter-SC spacing (SCS) is 30kHz or 15kHz, respectively. The unit of one RB in frequency and one symbol in time is called a physical RB (PRB).

[0068] DL signals include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS) also referred to as pilot signals. The gNB transmits data information or DCI through a corresponding physical DL shared channel (PDSCH) or physical DL control channel (PDCCH). PDSCH or PDCCH can be transmitted on a variable number of slot symbols including one slot symbol. For simplicity, the DCI format that schedules PDSCH reception by the UE is referred to as the DL DCI format; and the DCI format that schedules PUSCH transmission from the UE is referred to as the UL DCI format.

[0069] The gNB transmits one or more of multiple types of RS including Channel State Information RS (CSI-RS) and Demodulation RS (DM-RS). CSI-RS is mainly meant for UE to perform measurement and provide Channel State Information (CSI) to the gNB. For channel measurement, non-zero power CSI-RS (NZP CSI-RS) resources are used. For Interference Measurement Report (IMR), CSI Interference Measurement (CSI-IM) resources are used. The CSI process consists of NZP CSI-RS and CSI-IM resource processes.

[0070] The UE can determine the CSI-RS transmission parameters through DL control signaling or higher layer signaling (such as radio resource control (RRC) signaling) from the gNB. The transmission instance of CSI-RS can be indicated by DL control signaling; or can be configured by higher layer signaling. DM-RS is usually transmitted only within the BW of the corresponding PDCCH or PDSCH, and the UE can use DM-RS to demodulate data or control information.

[0071] Figure 4a An example DL slot structure 400 is shown according to an embodiment of the present disclosure. Figure 4a The illustrated embodiment of the DL slot structure 400 is for illustration only and can have the same or similar configuration. Figure 4 does not limit the scope of the present disclosure to any particular implementation.

[0072] like Figure 4a As shown, DL time slot 405 includes symbols 410 in which the gNB can send, for example, data information, DCI, or DM-RS. The DL system BW includes RBs. Each RB includes SC. For a total of SC 415, assigns M for PDSCH transmission BW to the UE. PDSCH RBs. The PDCCH conveying the DCI is sent through control channel elements (CCEs) that are generally spread across the DL system BW. The first slot symbol 420 can be used by the gNB to send the PDCCH. The second slot symbol 425 can be used by the gNB to send the PDCCH or PDSCH. The remaining slot symbols 430 can be used by the gNB to send the PDSCH and CSI-RS. In some slots, the gNB can also send synchronization signals and channels that convey system information such as synchronization signals and primary broadcast channel (SS / PBCH) blocks.

[0073] The UL signal also includes a data signal conveying information content, a control signal conveying UL control information (UCI), a DM-RS associated with data or UCI demodulation, a sounding reference signal (SRS) enabling the gNB to perform UL channel measurement, and a random access (RA) preamble enabling the UE to perform random access. The UE transmits data information or UCI through a corresponding physical UL shared channel (PUSCH) or a physical UL control channel (PUCCH). The PUSCH or PUCCH can be transmitted by a variable number of symbols in a time slot including one symbol. When the UE transmits data information and UCI simultaneously, the UE can multiplex both the data information and the UCI in the PUSCH.

[0074] The UCI includes Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information indicating correct or incorrect detection of a data transmission block (TB) or code block group (CBG) in the PDSCH, a Scheduling Request (SR) indicating whether the UE has data in the UE's buffer, and a CSI report that enables the gNB to select appropriate parameters for PDSCH or PDCCH transmission to the UE.

[0075] The CSI report from the UE can include a channel quality indicator (CQI) that notifies the gNB of the maximum modulation and coding scheme (MCS) for UE detection of TBs at a predetermined block error rate (BLER) (such as 10% BLER, etc.), a precoding matrix indicator (PMI) that notifies the gNB how to combine signals from multiple transmitter antennas according to the multiple-input multiple-output (MIMO) transmission principle, a CSI-RS resource indicator (CRI) indicating the CSI-RS resource associated with the CSI report, and a rank indicator (RI) indicating the transmission rank for the PDSCH.

[0076] UL RS includes DM-RS and SRS. DM-RS is usually transmitted only within the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use DM-RS to demodulate the information in the corresponding PUSCH or PUCCH. SRS is sent by the UE to provide UL CSI to the gNB, and for TDD systems, SRS transmission can also provide PMI for DL ​​transmission. Additionally, in order to establish synchronization or initial higher layer connection with the gNB, the UE can send a physical random access channel (PRACH).

[0077] Figure 4b An example UL slot structure 450 for PUSCH transmission or PUCCH transmission according to an embodiment of the present disclosure is shown. Figure 4b The illustrated embodiment of the UL timeslot structure 450 is for illustration only and can have the same or similar configuration. Figure 4b The scope of the present disclosure is not limited to any particular implementation.

[0078] like Figure 4b As shown, time slot 455 includes symbols 460 in which the UE sends (for example) data information, UCI or DM-RS. The UL system BW includes RBs. Each RB includes SC. For a total of SC 465, which assigns the UE M for PUSCH transmission BW ("X"="S") or M for PUCCH transmission BW ("X"="C"). PUXCH The last one or more symbols of a slot can be used, for example, to multiplex an SRS transmission 470 or a short PUCCH transmission from one or more UEs.

[0079] Figure 5a An example transmitter structure 501 using OFDM according to an embodiment of the present disclosure is shown. Figure 5a The illustrated embodiment of the transmitter structure 501 is for illustration only and can have the same or similar configuration. Figure 5a The scope of the present disclosure is not limited to any particular implementation.

[0080] like Figure 5a As shown, information bits such as DCI bits or data information bits 502 are encoded by encoder 504, rate matched with assigned time / frequency resources by rate matcher 506, and modulated by modulator 508. Subsequently, modulation coded symbols and DM-RS or CSI-RS 510 are mapped to SC by SC mapping unit 512, inverse fast Fourier transform (IFFT) is performed by filter 516, cyclic prefix (CP) is added by CP, and the resulting signal is filtered by filter 518 and transmitted by radio frequency (RF) unit 520.

[0081] Figure 5b An example receiver structure 531 using OFDM is shown according to an embodiment of the present disclosure. Figure 5b The illustrated embodiment of the receiver structure 531 is for illustration only and can have the same or similar configuration. Figure 5b The scope of the present disclosure is not limited to any particular implementation.

[0082] like Figure 5bAs shown, the received signal 532 is filtered by filter 534, CP 536 is removed by a CP removal unit, a fast Fourier transform (FFT) is applied by filter 538, the SC selected by the BW selector unit 542 is demapped by an SC demapping unit 540, the received symbols are demodulated by a channel estimator and demodulator unit 544, rate matching is restored by a rate dematcher 546, and the resulting bits are decoded by a decoder 548 to provide data information bits 550.

[0083] DL transmissions and UL transmissions can be based on an Orthogonal Frequency Division Multiplexing (OFDM) waveform, including a variant using DFT precoding known as DFT-spread-OFDM.

[0084] If the UE indicates a capability of carrier aggregation of more than 4 serving cells, the UE also indicates the maximum number of PDCCH candidates that the UE can monitor per time slot when the UE is configured for carrier aggregation operation on more than 4 cells. When the UE is not configured for dual connectivity operation, the UE determines the capability to monitor the total maximum number of PDCCH candidates per time slot, which corresponds to the total maximum number of PDCCH candidates that can be monitored per time slot. The maximum number of PDCCH candidates for downlink cells is Either the number of configured downlink cells or indicated by the UE.

[0085] For each DL bandwidth part (BWP) configured to the UE in the serving cell, the UE can be provided with P≤3 control resource sets (CORESETs) through higher layer signaling. For each CORESET, the UE is provided with a CORESET index p (0≤p<12), a DM-RS scrambling sequence initialization value, a precoder granularity of multiple resource element groups (REGs) in the frequency domain that the UE can assume uses the same DM-RS precoder, the number of consecutive symbols, a set of resource blocks (RBs), CCE to REG mapping parameters, an indication from an antenna port quasi-co-location set, an antenna port quasi-co-location information of the DM-RS antenna ports for PDCCH reception in the corresponding CORESET, and an indication of the presence or absence of a transmission configuration indication (TCI) field in the DCI format 1_1 transmitted by the PDCCH.

[0086] For each DL BWP configured for the UE in the serving cell, the UE is provided with S≤10 search space sets by higher layers. For each search space set from the s search space sets, the UE is provided with: a search space set index s (0≤s<40), an association between the search space set S and CORESETμ, k s The PDCCH monitoring periodicity of each time slot and o sThe PDCCH monitoring offset of each time slot, the PDCCH monitoring mode in the time slot (indicating the first symbol of the CORESET used for PDCCH monitoring in the time slot), T indicating the number of time slots in which the search space set s exists, s <k s The duration of each time slot, the number of PDCCH candidates per CCE aggregation level L And an indication of whether the search space set s is a common search space (CSS) set or a UE-specific (USS) set.

[0087] When the search space set s is a CSS set, a corresponding indication is provided to the UE as to whether to monitor PDCCH candidates for a DCI format from a predetermined DCI format set that schedules PDSCH reception or PUSCH transmission or provides control information. When the search space set s is a USS set, a corresponding indication is provided to the UE as to whether to monitor PDCCH candidates for a DCI format associated with scheduling PDSCH reception or PUSCH transmission.

[0088] The UE determines the PDCCH monitoring timing on the active DL BWP based on the PDCCH monitoring periodicity, PDCCH monitoring offset and PDCCH monitoring mode in the time slot. For the search space set S, if The UE determines that the f The frame has a number There is a PDCCH monitoring opportunity in the time slot of Starting T s PDCCH candidates are monitored for the search space set s in k consecutive time slots, and in the next k s -T s PDCCH candidates are not monitored for the search space set s in consecutive time slots.

[0089] The USSs at CCE aggregation level L∈{1,2,4,8,16} are defined by the PDCCH candidate set for CCE aggregation level L. For a search space set s associated with CORESET p, the search space set s associated with the carrier indicator field value n is CI The time slot of the corresponding serving cell's active DL BWP PDCCH candidates in the search space set The corresponding CCE index for aggregation level L is given by: For any CSS, For USS, Y p，-1 =n RNTI ≠0, for p mod 3 = 0, A p =39827, for p mod 3 = 1, A p=39829, for p mod 3 = 2, A p =39839, and D = 65537, i = 0, ..., L-1; N CCE,p is from 0 to N in CORESET p CCE,p -1 is the number of CCEs numbered; if the UE is configured with the carrier indicator field of the serving cell for monitoring the PDCCH on the serving cell, then n CI is the Carrier Indicator field value; otherwise, including for any CSS, n CI =0, in The UE is configured for use with n CI The number of PDCCH candidates monitored by the aggregation level L of the search space set s of the corresponding serving cell, for any CSS, For USS, is the n of all configurations of CCE aggregation level L for search space set s CI Above value The maximum value of and for n RNTI The radio network temporary identifier (RNTI) value is the cell-RNTI (C-RNTI).

[0090] The UE is expected to monitor PDCCH candidates for up to 4 sizes of DCI formats, including up to 3 sizes of DCI formats with C-RNTI scrambled by CRC for each serving cell. The UE counts the number of sizes of DCI formats per serving cell based on the number of PDCCH candidates configured in the corresponding search space set for the corresponding active DL BWP.

[0091] If the UE is configured with an active DL BWP or a reference DL BWP for monitoring PDCCH with SCS (subcarrier spacing) configuration μ downlink cells, of which The UE does not need to monitor more than 100 ms per time slot for each scheduled cell on the active DL BWP of the scheduling cell. PDCCH candidates or more non-overlapping CCEs.

[0092] If the UE is configured with a DL BWP for monitoring PDCCH with SCS configuration μ downlink cells, of which The DL BWP of the activated cell is the active DL BWP of the activated cell, and the DL BWP of the deactivated cell is the DL BWP with an index indicated by a higher layer for the deactivated cell (such as the first active DL BWP, etc.), then the UE does not need to The DL BWP of the scheduling cell of the downlink cell monitors more than PDCCH candidates or more non-overlapping CCEs.

[0093] For each scheduled cell, the UE is not required to monitor more than 100 ms per timeslot on the active DL BWP with SCS configuration μ of the scheduling cell. PDCCH candidates or more non-overlapping CCEs.

[0094] The UE is not expected to be configured with a CSS set that results in the number of monitored PDCCH candidates and non-overlapping CCEs for each time slot for the total scheduled cells or for each scheduled cell exceeding the corresponding maximum number per time slot. For same-cell scheduling or for cross-carrier scheduling where the scheduling cell and the scheduled cell have a DL BWP with the same SCS configuration μ, the UE is not expected to have the number of PDCCH candidates and the corresponding number of non-overlapping CCEs per time slot on the secondary cell greater than the corresponding number that the UE can monitor on the secondary cell per time slot. For cross-carrier scheduling, the number of PDCCH candidates for monitoring per time slot is counted separately for each scheduled cell.

[0095] For all search space sets in time slot n, by S CSS Indicates the cardinality is I CSS A set of CSS sets, and through S USS Indicates the cardinality is J USS A set of USS sets. j (0≤j <J USS ) in S USS The positions in are in ascending order according to the search space set index. (0≤i CSS ) indicates that for CSS set S CSS (i) counting the number of PDCCH candidates to monitor; and by (0≤j <J USS ) indicates that for USS set S USS (j) The number of PDCCH candidates counted.

[0096] For CSS sets, UE monitors PDCCH candidates, thus requiring a total of​ non-overlapping CCEs.

[0097] According to the following pseudo code as shown in Table 1, the UE allocates PDCCH candidates for monitoring to the USS set for the primary cell with an active DLBWP with SCS configuration μ in slot n. CCE (S uss (j)) represents the search space set S uss (j) non-overlapping CCE sets, and through C(V CCE (S uss (j))) indicates V CCE (S uss (j)) cardinality, where the search space set S uss The non-overlapping CCEs of (j) are considered for the PDCCH candidates allocated for monitoring for the CSS set and for all search space sets S uss (k)(0≤k≤j) is determined by the PDCCH candidates allocated for monitoring.

[0098]

Table 1

[0099]

[0100] The time span used for PDCCH monitoring is defined in symbols by a pair of (X, Y) values. For any two PDCCH monitoring occasions of the same search space set or different search space sets, there is a minimum time separation of X symbols (including across slot boundaries) between the beginning (i.e., the first symbol) of two consecutive spans (span gaps). The length of each span is at most Y consecutive symbols, starting at the first symbol at the start of the PDCCH monitoring occasion and ending at the last symbol at the end of the PDCCH monitoring occasion. For example, Y can be the maximum CORESET length of the search space set for which the UE monitors PDCCH within X consecutive symbols.

[0101] The UE can perform additional PDCCH monitoring within a time slot when the additional PDCCH monitoring starts at least after X symbols from the start of the previous symbol. The first search space set can be associated with a smaller PDCCH monitoring time span or at least with a smaller span gap value X than the second search space set, because, for example, the first search space set can be associated with a scheduling application requiring a shorter latency requirement than the second search space set. Therefore, it is necessary to determine the total number of PDCCH candidates and the total number of non-overlapping CCEs of the search space sets with different PDCCH monitoring span gaps X configured by the UE.

[0102] PDCCH transmissions can represent a material overhead of DL resources, or for flexible duplex systems, of total resources. For example, when the UE density per cell is large, such as for machine type communications, also often referred to as Internet of Things (IoT) communications, multiple PDCCH transmissions from the gNB per timeslot on the cell can potentially consume a large proportion of the frequency resources on the cell. Furthermore, the bandwidth of a cell may be shared for transmissions employing different radio access technologies, such as Long Term Evolution (LTE) and New Radio (NR), and resources for PDCCH transmissions may not always be available.

[0103] Although PDCCH transmission can be avoided when PDSCH reception or PUSCH or PUCCH transmission by the UE is configured by higher layers, such as by radio resource control (RRC) signaling, this results in inflexible network operation with no possibility of fast link adaptation and any changes in the communication setup require reconfiguration through higher layer signaling.

[0104] For example, several attributes related to reception by or transmission from a UE on a cell, such as time-frequency resources (mode) for rate matching reception or transmission, are provided / configured to the UE by higher layers through common system information or through UE-specific information. Reconfiguration of such attributes requires the UE to be paged and then scheduled PDSCH reception through DCI format in PDCCH so that the system information provides the reconfiguration or so that each UE is individually provided with the reconfiguration in scheduled PDSCH reception through DCI format in PDCCH. Mechanisms that update communication parameter configuration based on paging and subsequent system information updates or based on UE-specific higher layer signaling for each UE are difficult for the network to support and limit the ability of the network to flexibly adapt to changes in traffic or channel medium characteristics. Similarly, for the configuration of parameter values ​​such as the Modulation and Coding Scheme (MCS) table, or for the Time Domain Resource Allocation (TDRA) table through UE-specific RRC signaling, or for the Transmit Configuration Indication (TCI) state of the CORESET, the delay in reconfiguring the parameter values ​​through RRC signaling may be too large in some cases, and this also limits the ability of the network to adapt to changing traffic or channel conditions or UE mobility.

[0105] Therefore, there is a need to enable the network to utilize available control signaling resources and distribute control signaling across cells or BWPs based on instantaneous traffic demand.

[0106] There is also a need to enable the UE to receive or send control signaling in a portion of a bandwidth that is larger than the bandwidth in which the UE receives or sends data signaling.

[0107] There is also a need to determine the total number of PDCCH candidates and the total number of non-overlapping CCEs that a UE configured with different PDCCH monitoring span gaps can be expected to monitor at a given time.

[0108] Finally, there is a further need to enable the network to provide updates to the configuration of communication parameters without the use of higher layer signaling.

[0109] The present disclosure relates to providing a quasi-fifth generation (pre-5G) or 5G communication system for supporting higher data rates beyond fourth generation (4G) communication systems such as long term evolution (LTE). The present disclosure relates to enabling a network to utilize available control signaling resources based on instantaneous business needs and distribute control signaling across cells or BWPs. The present disclosure also relates to enabling a UE to receive or send control signaling in a portion of a bandwidth larger than the bandwidth over which the UE receives or sends data signaling. The present disclosure additionally relates to determining the total number of PDCCH candidates and the total number of non-overlapping CCEs that a UE configured with different PDCCH monitoring span gaps can be expected to monitor at a given time. The present disclosure also relates to enabling a network to provide an update to the configuration of communication parameters without using higher layer signaling.

[0110] In one embodiment, a configuration for a UE is considered so that the UE receives PDCCH candidates on multiple cells, or on multiple BWPs of a cell, or on a BWP including a BWP for PDSCH reception, wherein the PDCCH reception provides a DCI format that schedules PDSCH reception or PUSCH transmission on the BWP of the cell. In such embodiments, a configuration for the UE to send PUCCH on multiple cells or on multiple BWPs of a cell is also considered, wherein the UE sends PUCCH on cells from multiple cells or on BWPs of multiple BWPs from a cell.

[0111] The UE can be configured to monitor the search space set of PDCCH candidates for the DCI format of PDSCH reception or PUSCH transmission scheduled on the cell on different cells. For example, in order to schedule PUSCH transmission from the UE on the first cell, the UE can be configured to: monitor the first search space set of PDCCH candidates on the first cell (or on the third cell) for the DCI format of PUSCH transmission scheduled on the first cell; and monitor the second search space set of PDCCH candidates on the second cell for the DCI format of PUSCH transmission scheduled on the first cell.

[0112] In one example, it may be beneficial for the gNB to use the second search space set for PDCCH transmissions to the UE, e.g., when a PDCCH transmission from the first search space set would be blocked by another PDCCH transmission or by other signaling, or when the CORESET for the first search space set would be underutilized by having only one PDCCH transmission, or when a PDCCH transmission from the first search space set would be impossible due to blocked channel access, e.g., for operation on unlicensed spectrum.

[0113] The UE can thus be configured simultaneously to use a first search space set for PDCCH reception on the first cell for self-carrier (self-cell) scheduling on the first cell, and to use a second search space set for PDCCH reception on the second cell for cross-carrier (cross-cell) scheduling on the first cell. For the first search space set for scheduling PDSCH reception or PUSCH transmission on the first cell, the carrier indicator field value is n CI = 0. For the second search space set, the carrier indicator field value is different from 0 (such as n CI =1, etc.), and can be provided by the gNB to the UE through higher layer signaling, or the carrier indicator field value can be determined according to the cell index or according to the number of cells used for cross-carrier scheduling on the cell.

[0114] When the UE is in SCS configuration μ 1 The UE monitors the PDCCH in the BWP of the first cell and the UE is in the SCS configuration μ 2 When the UE monitors the PDCCH in the BWP of the first cell in order to schedule PDSCH reception or PUSCH transmission on the BWP of the first cell, the UE is used to 1 The total number of PDCCH candidates and non-overlapping CCEs monitoring the PDCCH on the DL BWP of the cell of the UE counts the PDCCH candidates and non-overlapping CCEs of the first search space set; and the UE uses the number of PDCCH candidates and non-overlapping CCEs for the UE with SCS configuration μ 2 The total number of PDCCH candidates and non-overlapping CCEs monitoring the PDCCH on the DL BWP of the cell counts the PDCCH candidates and non-overlapping CCEs of the second search space set.

[0115] Figure 6 600 is a flowchart of a UE process for searching a space set according to an embodiment of the present disclosure. For example, Figure 6 Configuration of a first search space set on a first cell and a second search space set on a second cell for scheduling PDSCH reception to the UE or PUSCH transmission for the UE is shown. Figure 6The embodiment of the UE process 600 shown is for illustration only. It can be implemented in dedicated circuits configured to perform the indicated functions. Figure 6 One or more components are illustrated, or can be implemented by one or more processors executing instructions to perform the indicated functions. Other embodiments may be used without departing from the scope of the present disclosure.

[0116] like Figure 6 As illustrated, in step 610, the UE is configured with a first search space set associated with a CORESET on a first cell and a second search space set associated with a CORESET on a second cell for scheduling PDSCH reception to the UE or PUSCH transmission from the UE on the first cell. In step 620, the UE detects a DCI format in a PDCCH reception from the first search space set or in a PDCCH reception from the second search space set, wherein the DCI format schedules PDSCH reception or PUSCH transmission during a certain time period on the first cell. The UE can expect to detect only one DCI format that schedules PDSCH reception or PUSCH transmission in non-overlapping time resources or in non-overlapping frequency resources on the first cell. In step 630, the UE receives PDSCH or transmits PUSCH during the time period on the first cell.

[0117] The configuration of the first search space set and the second search space set can be unrestricted and allow for: time-overlapping PDCCH monitoring opportunities (such as PDCCH monitoring opportunities within the same time slot or within the same span gap X, etc.), or can be restricted to only allow: non-overlapping PDCCH monitoring opportunities (such as the PDCCH monitoring opportunity according to the first search space set is not within the same time slot or span gap X as the PDCCH monitoring opportunity according to the second search space set, etc.).

[0118] Instead of enabling configuration for self-carrier scheduling and cross-carrier scheduling on an active DL BWP or UL BWP through corresponding configuration of a search space set, it is also possible that self-carrier scheduling or cross-carrier scheduling is a BWP specific configuration parameter. For example, when the UE has a first DL BWP as an active BWP on a cell, self-carrier scheduling is used to schedule PDSCH reception to the UE on the first DL BWP of the cell, whereas when the UE has a second DL BWP as an active BWP on the cell, cross-carrier scheduling is used to schedule PDSCH reception to the UE on the second DL BWP of the cell.

[0119] This can be beneficial, for example, when the UE experiences different interference conditions in different BWPs. In this case, cross-carrier scheduling can be used when the UE experiences greater interference in a BWP, since PDCCH reception does not benefit from HARQ retransmissions. This can be beneficial, for example, when the gNB prefers to use the BWP for PDSCH (and CSI-RS) transmission without the control signaling overhead for PDCCH transmission. Then, with the active BWP change indication in DCI format in PDCCH reception, the latency for the UE to switch between self-carrier scheduling and cross-carrier scheduling for the scheduled cell is minimized.

[0120] The UE can be configured with a first BWP for PDCCH reception and a second BWP for PDSCH reception. The second BWP can be included in the first BWP. The second BWP may also not be directly defined as a separate BWP; instead, the UE can be configured for PDSCH reception in a portion of the first BWP. The frequency domain resource allocation field in the DCI format that schedules PDSCH reception can address only the second BWP. This can enable the UE to receive PDCCH on a wider BWP in order to provide more PDCCH resources and avoid blocking of PDCCH transmissions, particularly when multiple UEs can be scheduled at the same PDCCH monitoring opportunity. The frequency domain resource allocation for PDSCH reception can be restricted to a smaller bandwidth, for example for applications associated with the reception of small transport blocks, and the corresponding field in the DCI format that schedules PDSCH reception can be determined based on the smaller bandwidth.

[0121] A UE can be configured with PUCCH resources in different BWPs of a cell or in different cells. This may be beneficial for the gNB to dynamically balance PUCCH resource overhead between different BWPs or cells, adapt to the channel medium and interference conditions experienced by the UE in different BWPs or cells, account for cell availability such as when a first cell operates on an unlicensed spectrum and a second cell operates on a licensed spectrum, etc. For example, a PUCCH resource set can include PUCCH resources in different BWPs of a cell or in different cells. A BWP index or a cell index can be included in a parameter identifying a PUCCH resource, such as an associated PUCCH format, etc. The PUCCH resource indicator field in the DCI format can indicate the PUCCH resources used for PUCCH transmission, which also includes a BWP index or a cell index.

[0122] For example, when the BWP index or cell index is not part of the PUCCH resources, a separate field can be included in the DCI format that triggers the PUCCH transmission from the UE to indicate the BWP index or cell index used for the PUCCH transmission. Depending on the cell used for the PUCCH transmission, the UE can be configured to apply a separate accumulation of TPC commands to determine the PUCCH transmission power according to the corresponding cell index.

[0123] Figure 7 A flow chart of a UE process 700 for determining a cell for PUCCH transmission according to an embodiment of the present disclosure is shown. Figure 7 The embodiment of the UE process 700 shown is for illustration only. It can be implemented in dedicated circuits configured to perform the indicated functions. Figure 7 One or more components are illustrated, or can be implemented by one or more processors executing instructions to perform the indicated functions. Other embodiments may be used without departing from the scope of the present disclosure.

[0124] like Figure 7 As illustrated, the UE is configured with a PUCCH resource set. In step 710, the PUCCH resource includes a cell index. In step 720, the UE detects a DCI format indicating a PUCCH resource for PUCCH transmission. For example, the DCI format may be the last DCI format from a set of DCI formats indicating PUCCH transmissions within the same time interval (such as a time slot, etc.). In step 730, the UE determines a cell index included in a parameter set associated with the PUCCH resource. In step 740, the UE transmits the PUCCH on the cell having the index associated with the PUCCH resource.

[0125] In one embodiment, consideration is given to determining the total number of PDCCH candidates and the total number of non-overlapping CCEs that the UE is expected to monitor for search space sets with different PDCCH monitoring span gaps.

[0126] When the UE is configured to monitor PDCCH candidates over different time spans (X, Y) of the same cell, the UE determines the total number of PDCCH candidates and the total number of non-overlapping CCEs that the UE can monitor in the active DL BWP of the cell within the minimum gap of the time span according to the corresponding UE capability.

[0127] For example, when the UE indicates that it wants to 1 ,Y 1 ) symbols in a time span of M 1 PDCCH candidates and C 1 non-overlapping CCEs and (X 2 ,Y 2 ) symbols in a time span of M2 PDCCH candidates and C 2 non-overlapping CCE capability (where X 2 <X 1 And Y 2 ≤Y 1 ), and the UE is configured for a periodicity of X 1 The first search space set of symbols and the periodicity is X 2 When monitoring the PDCCH with a second search space set of symbols, it is possible to 2 ,Y 2 ) symbols, and the number of non-overlapping CCEs that the UE is expected to monitor.

[0128] For example, when X 1 =7,X 2 =2, and Y 1 =Y 2 =2, UE based on M 2 and C 2 The number of PDCCH candidates to be monitored and the number of overlapping CCEs to be monitored are determined. and Can be used and Replace, where and is the maximum number of PDCCH candidates and non-overlapping CCEs that a UE can monitor within a PDCCH monitoring span with a minimum gap value of X. Similarly, and Can be used and Replace. Equivalently, if the UE can press (X 1 ,Y 1 ) symbols and press (X 2 ,Y 2 ) symbols to monitor the PDCCH, where X 2 <X 1 And Y 2 ≤Y 1 , and the UE is configured to be at least X 1 The UE monitors the PDCCH at consecutive times separated by symbols, and the UE 1 ,Y 1 ) symbols to monitor the PDCCH.

[0129] Figure 8a A flow chart of a UE process 800 for determining PDCCH candidates according to an embodiment of the present disclosure is shown. Figure 8aThe embodiment of the UE process 800 shown is for illustration only. It can be implemented in dedicated circuits configured to perform the indicated functions. Figure 8a One or more components are illustrated, or can be implemented by one or more processors executing instructions to perform the indicated functions. Other embodiments may be used without departing from the scope of the present disclosure.

[0130] Figure 8b An example for determining PDCCH candidates 840 according to an embodiment of the present disclosure is shown. Figure 8b The illustrated embodiment of the PDCCH candidate 840 is for illustration only. It can be implemented in a dedicated circuit configured to perform the indicated functions. Figure 8b One or more components are illustrated, or can be implemented by one or more processors executing instructions to perform the indicated functions. Other embodiments may be used without departing from the scope of the present disclosure.

[0131] Figure 8a and Figure 8b Determination of the maximum number of PDCCH candidates and the maximum number of non-overlapping CCEs by a UE according to the present disclosure is shown.

[0132] like Figure 8a As shown, in step 810, the UE is configured with (X 1 ,Y 1 ) symbols and (X 2 ,Y 2 ) symbols in a time span. Figure 8b In the example shown, reference numeral 842 corresponds to X 1 =7, reference numeral 844 corresponds to Y 1 =3, reference numeral 852 corresponds to X 2 =4 and reference numeral 854 corresponds to Y 2 =2. The search space set can be located on the active BWP of the same cell or a different cell with the same SCS configuration μ. In step 820, the UE determines X 2 <X 1 In step 830, the UE then performs a 2 ,Y 2 ) determines the maximum number of PDCCH candidates to be monitored in any span based on the maximum number of PDCCH candidates and the maximum number of non-overlapping CCEs. The determination can be as previously described for and And for and Just as described.

[0133] To illustrate the ability of a UE to monitor a larger number of PDCCH candidates or a larger number of non-overlapping CCEs as the value of X increases, for example, 1 >X 2 For M 1 >M 2 or C 1 >C 2 , by scaling by the ratio between the number of search space sets with a span gap of X symbols and the number of all search space sets on the active BWP of the cell with SCS configuration μ, the UE is able to determine the total number of PDCCH candidates and the total number of non-overlapping CCEs for each PDCCH monitoring span gap for each value of X associated with the search space set on the active BWP of the cell with SCS configuration μ.

[0134] When the UE is configured with a DL BWP for monitoring PDCCH with SCS configuration μ downlink cells and a search space set with a PDCCH monitoring span interval of at least X symbols, where When the DL BWP of the activated cell is the active DL BWP of the activated cell and the DL BWP of the deactivated cell is the DL BWP with an index indicated by a higher layer for the deactivated cell, the UE is not required to The DLBWP of the scheduling cell of the downlink cell monitors more than a total of PDCCH candidates or more than the total non-overlapping CCEs, where and are the maximum number of PDCCH candidates that the UE can monitor within a span of X symbols for the SCS configuration μ and the maximum number of non-overlapping CCEs, respectively. is the total number of search space sets over all DL BWPs of cells with SCS configuration μ, and is the sum of all search space sets over the active BWP of cells with SCS configuration μ.

[0135] Considering the aforementioned method for enabling a UE to be configured to monitor PDCCH for multiple time spans (X, Y) on an active DL BWP of a cell to determine the total number of PDCCH candidates or the total number of non-overlapping CCEs for PDCCH monitoring on a DL BWP of the cell according to a minimum gap X of the time span, and by express The number of downlink cells in In a downlink cell, the UE monitors the PDCCH with a span interval of X symbols (the minimum for the DL BWP of the cell). and Then, there is no need for UE to The cells monitor more than a total of PDCCH candidates or more than the total non-overlapping CCEs.

[0136] The number of cells that a UE can configure for more than μ for all SCS configurations The number of large cells Declare PDCCH monitoring capability. In that case, for any PDCCH monitoring span gap X, as an alternative to assigning PDCCH candidates and non-overlapping CCEs to scheduled cells that fully utilize the PDCCH monitoring capability of the UE, when the UE does not declare PDCCH monitoring capability for the number of cells or when the number of cells configured for all SCS configurations μ Greater than or equal to When the UE is expected to monitor a maximum number of PDCCH candidates greater than or the maximum number of non-overlapping CCEs The maximum number of PDCCH candidates or the maximum number of non-overlapping CCEs.

[0137] For example, it can be expected that the UE monitors The maximum number of PDCCH candidates and is determined as The maximum number of non-overlapping CCEs, or The cell was identified as or

[0138] The UE can be configured with more than The total number of cells with large UE capabilities Regardless of the PDCCH monitoring span interval and for the sake of simplicity in considering the PDCCH monitoring capability per time slot, the total number of PDCCH candidates and the total number of non-overlapping CCEs Can be less than or Then, the UE and the serving gNB need to configure μ for each SCS. Among them PDCCH candidates and The partitioning of non-overlapping CCEs has common understanding.

[0139] In one embodiment, when the active BWP on the primary cell has SCS configuration μ, the UE PDCCH candidates and non-overlapping CCEs are allocated to the primary cell PDCCH candidates and non-overlapping CCEs, and distribute the remaining CCEs to the secondary cells with SCS configuration μ PDCCH candidates and the remaining non-overlapping CCEs (if any).

[0140] In one example, the UE allocates PDCCH candidates and For example, the maximum number of PDCCH candidates and non-overlapping CCEs per cell is limited to and And it is limited that the number of PDCCH candidates and non-overlapping CCEs across all secondary cells does not exceed and The UE allocates PDCCH candidates and non-overlapping CCEs to each secondary cell according to the corresponding configuration of the search space set. When the active BWP on the primary cell does not have the SCS configuration μ, the UE allocates PDCCH candidates and non-overlapping CCEs to the secondary cell with the SCS configuration μ. PDCCH candidates and non-overlapping CCEs (if any).

[0141] In another example, no allocation is specified for the number of PDCCH candidates or the number of non-overlapping CCEs for the secondary cells, and for all CSS sets and USS sets associated with all secondary cells, the UE expects the total number of PDCCH candidates to not exceed And the total number of non-overlapping CCEs does not exceed The maximum number of PDCCH candidates per time slot is And the maximum number of non-overlapping CCEs per time slot is

[0142] In one embodiment, regardless of whether the cell is a primary cell or a secondary cell, the UE allocates the cell with the SCS configuration μ to the cell. PDCCH candidates and non-overlapping CCEs (if any), and it is up to the gNB scheduler to ensure that the total number of PDCCH candidates and non-overlapping CCEs across all scheduled cells with SCS configuration μ does not exceed and In another example, the UE directly calculates the number of PDCCH candidates and the number of non-overlapping CCEs for each cell with SCS configuration μ as and

[0143] The aforementioned embodiments and / or examples are also directly applicable to any PDCCH monitoring span gap X according to any previous method regarding PDCCH monitoring as a function of the PDCCH monitoring span gap.

[0144] In one embodiment, the use of a DCI format in the PDCCH is considered to indicate the configuration of parameters related to UE-specific information or to system information provided by the gNB for a cell or for a BWP of a cell.

[0145] The UE can be provided with an RNTI, such as a config-RNTI, for scrambling the CRC of the DCI format. For simplicity, the DCI format may be referred to as DCI format S. The UE can determine the CCE for receiving the PDCCH providing the DCI format through the corresponding common search space (CSS). The DCI format S can have the same size as another DCI format that the UE is configured to monitor in the same CORESET according to the CSS or according to the UE-specific search space (USS).

[0146] In addition, instead of providing a separate RNTI, a bit field or combination of bit field values ​​is provided in the DCI format in which the UE is also configured to monitor the PDCCH so that it can be used to indicate the functionality of the DCI format. For example, a 1-bit field can be included in the DCI format to indicate whether the DCI format schedules PDSCH with system information or with paging information, or whether the DCI format provides TPC commands, etc., or whether the DCI format indicates the value of a parameter also provided by (UE-common or UE-specific) system information.

[0147] A set of values ​​for each parameter from the parameter set can be provided to the UE from the gNB by higher layers. For example, the parameter may be ControlResourceSetZero and the value controlResourceSetZero can be provided to the UE, the index of a CORESET with index 0 provided from a set of CORESETs. For example, the parameter may be CommonControlResourceSet and the value CommonControlResourceSet for a common control resource set with an index other than 0, which can be associated with a CSS or a USS, can be provided to the UE. For example, the parameter may be SearchSpaceZero; and, in a BWP other than an initial BWP, the value SearchSpaceZero for a common search space with index 0 can be provided to the UE.

[0148] For example, the value may be a search space index such as searchSpaceSIB1 or pagingSearchSpace or ra-SearchSpace for the UE to monitor PDCCH for a DCI format such as scheduling SIB 1, paging message or random access response, respectively, in a BWP other than the initial BWP.

[0149] For example, the value may be ssb-PositionsInBurst indicating the time domain position of the transmitted SS / BPCH block in the half-frame, where the first / leftmost bit corresponds to SS / PBCH block index 0, the second bit corresponds to SS / PBCH block index 1, and so on. A value of 0 or 1 in the bitmap indicates that the corresponding SS / PBCH block is not transmitted or is transmitted, respectively.

[0150] For example, the value may be ssb-PeriodicityServingCell indicating a periodicity at which SS / PBCH blocks are sent for UEs having reception in an associated BWP to rate match the reception with respect to SS / PBCH block resources.

[0151] For example, the value may be ss-PBCH-BlockPower indicating the average energy per resource element (EPRE) in dBm of the resource elements used by the gNB to send the secondary synchronization signal in the SS / PBCH block.

[0152] For example, the value may be tdd-UL-DL-ConfigurationCommon indicating a UL / DL configuration for flexible duplex (TDD) operation, such as, for example, for a period greater than 10 milliseconds.

[0153] For example, the value may be rateMatchPatternToAddModList indicating a rate-matched resource pattern for PDSCH reception for the same SCS configuration.For example, the value may be the number of PDCCH candidates per CCE aggregation level for a search space set of a DCI format associated with a common search space such as searchSpaceSIB1, pagingSearchSpace, or ra-SearchSpace.

[0154] For example, for a DCI format of associated PDCCH candidates with CCE positions determined by a common search space (such as a DCI format for providing TPC commands to a group of UEs, etc.), or for a DCI format indicating resources whose transmissions have been interrupted to a group of UEs, a value can be used to enable or disable PDCCH monitoring in one or more search space sets.

[0155] The UE can be configured with a parameter set having a value provided by the DCI format S; or the parameter set can be predetermined in system operation. The UE can also be configured with a starting position and size of a bit field in the DCI format S; wherein the value of the parameter is provided, or the position or size of the bit field in the DCI format S can be predetermined in system operation. The UE can also be provided with a search space set for monitoring PDCCH candidates providing the DCI format S, or the DCI format S can be associated with a search space set having a predetermined index such as 0, and the UE can monitor the PDCCH in a corresponding CORESET (such as a CORESET having an index of 0, etc.) to obtain the associated PDCCH candidates.

[0156] The UE can also be configured with a BWP set to which the value of the parameter can be applied; or the BWP set can be predetermined in system operation and (for example) only includes the BWP that provides PDCCH reception of DCI format S.

[0157] Fig. 9 A flow chart of a UE process 900 of determining values ​​of parameter sets according to an embodiment of the present disclosure is shown. Fig. 9 The embodiment of the UE process 900 shown is for illustration only. It can be implemented in dedicated circuits configured to perform the indicated functions. Fig. 9 One or more components are illustrated, or can be implemented by one or more processors executing instructions to perform the indicated functions. Other embodiments may be used without departing from the scope of the present disclosure.

[0158] like Fig. 9As illustrated, in step 910, the UE is configured to monitor the PDCCH for a DCI format S including a field providing a value for a parameter set. The DCI format S does not schedule PDSCH reception or PUSCH transmission. For example, the parameter set can include one or more of ControlResourceSetZero, commonControlResourceSet, searchSpaceZero, searchSpaceSIB1, pagingSearchSpace, ra-SearchSpace, ssb-PositionsInBurst, ssb-PeriodicityServingCell, ss-PBCH-BlockPower, tdd-UL-DL-ConfigurationCommon, rateMatchPatternToAddModList, or the number of PDCCH candidates per CCE aggregation level for a search space set of some or all DCI formats associated with a common search space such as for searchSpaceSIB1, pagingSearchSpace, or ra-SearchSpace. In step 920, the UE detects format S. In step 930, the UE updates the value of the parameter set with the value provided by the DCI format S. In step 940, the UE receives signaling according to the value of the updated parameter set.

[0159] In order to provide updates to parameters associated with system information, the DCI format S may be a UE-specific DCI format (such as a DCI format with a CRC scrambled by a C-RNTI, etc.), and provide updates to the values ​​of parameters used by the UE to receive PDSCH or transmit PUSCH. For example, the DCI format may be a DCI format that the UE monitors based on a USS set used to schedule PDSCH reception or PUSCH transmission. Several methods can be applied to distinguish the content of a DCI format between: scheduling PDSCH reception or scheduling PUSCH transmission, and indicating updated values ​​of parameters associated with PDSCH reception or PUSCH transmission, including using (a) different RNTIs, (b) a flag field indicating an interpretation of the remaining fields of the DCI format, (c) a predetermined combination of values ​​of predetermined fields of the DCI format so that the remaining fields of the DCI format can be interpreted as indicating a reconfiguration of the values ​​of the parameters used for PDSCH reception or PUSCH transmission, and the like.

[0160] For example, when the UE experiences degraded channel conditions, reconfiguration of parameter values ​​for the UE to receive PDSCH or transmit PUSCH can include: an indication of an MCS table or CQI table with a lower spectral efficiency value, an indication of a (more) repeated time domain resource allocation (TDRA) table for PDSCH reception or PUSCH transmission, an indication of a different group of search space sets including a larger number of PDCCH candidates for a larger CCE aggregation level, and the like. The opposite can be applied when the UE experiences improved channel conditions. Each parameter value to be indicated can come from a predetermined set of values ​​for a parameter in system operation; or from a set of values ​​for a parameter provided by a higher layer. For example, a set of 3 or 4 MCS tables or a set of 3 or 4 CQI tables or the number of RB groups indicated by the frequency domain resource allocation (FDRA) field can be predetermined in system operation; and can be indicated by the DCI format. For example, a set of search space set groups (such as a set of two set groups, etc.), or a set of CORESET groups (such as a set of two CORESET groups, etc.), or a set of TDRA tables (such as a set of 4 TDRA tables, etc.), etc. can be provided by a higher layer, and an element of the set can be indicated by a DCI format. For example, the TCI state of a CORESET can be indicated from a TCI state set previously provided by a higher layer, and for example, a PDCCH transmission providing a DCI format can be in a different CORESET (such as a CORESET with index 0 that may not be compatible with the TCI state, etc.). This adaptation of parameter values ​​results in less latency than reconfiguration of parameter values ​​by higher layer signaling and more robust system operation. Even if the DCI format does not schedule reception of TBs in the PDSCH or transmission of TBs in the PUSCH, the UE can provide HARQ-ACK information in response to detection of the DCI format.

[0161] Although the present disclosure has been described with exemplary embodiments, various changes and modifications may be suggested to those skilled in the art. The present disclosure is intended to include such changes and modifications as fall within the scope of the appended claims. The descriptions in this application should not be read as implying that any particular element, step or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A user equipment UE, the UE comprising: A transceiver, the transceiver being configured to: The capability information for receiving a physical downlink control channel (PDCCH) on a downlink cell according to at least two (X, Y) combinations is transmitted, wherein: The PDCCH reception is performed in any symbol of a span, the length of the span is at most Y symbols in a time slot, and the number of symbols between the first symbols of two consecutive spans is X; and receiving configuration information of one or more search space sets for PDCCH reception on the DL cell; and a processor operably connected to the transceiver and configured to: If the UE indicates a capability to monitor at least one PDCCH according to the at least two combinations, and the UE is configured with one or more search space sets having first symbols of consecutive spans separated by at least X values ​​of one or more of the at least two combinations, determining to monitor at least one PDCCH according to a combination having a maximum X value among the one or more combinations, Among them, a larger maximum number of PDCCH candidates is associated with a larger value of X. The transceiver is further configured to receive at least one PDCCH on the DL cell based on the configuration information.

2. The UE according to claim 1, wherein: If the UE indicates a capability to monitor the at least one PDCCH according to the two combinations and the UE is configured with the one or more search space sets having first symbols of consecutive spans separated by at least the larger X value of the two combinations, The processor is then configured to determine to monitor the at least one PDCCH according to a first combination having a larger X value among the two combinations.

3. The UE according to claim 1, wherein: The processor is further configured to: Determining to monitor at least one PDCCH according to the combination related to a larger maximum number of PDCCH candidates and a larger maximum number of non-overlapping CCEs per span.

4. The UE according to claim 1, wherein: The transceiver is further configured to receive configuration of a DL cell, wherein in the The scheduling on the DL cell is achieved by kHz subcarrier spacing SCS value corresponding to the PDCCH reception, j = 0, ..., J, where J is a predetermined number of SCS values, and, The processor is further configured to determine the maximum number of PDCCH candidates and the maximum number of non-overlapping CCEs as and , in: is the number of DL cells configured for the UE or indicated by the UE, and The UE is capable of monitoring the SCS configuration. The span interval is the maximum number of PDCCH candidates and the maximum number of non-overlapping CCEs of X symbols. is The number of cells in which the UE in the downlink cells monitors the PDCCH according to a span interval of X symbols, and The 'floor' function rounds a number to the next lower integer.

5. The UE according to claim 1, wherein: The transceiver is further configured to receive: A PDCCH on the DL cell according to the search space set, configuration of a second search space set for PDCCH reception on a second DL cell, a PDCCH on the second DL cell according to the second search space set, and A first physical downlink shared channel PDSCH and a second PDSCH on the DL cell, the first PDSCH and the second PDSCH providing a first transport block TB and a second transport block TB respectively, wherein: The first PDSCH is scheduled by a first downlink control information DCI format provided by PDCCH reception on the DL cell, and, The second PDSCH is scheduled by a second DCI format provided by PDCCH reception on the second DL cell, and, in: The first DCI format includes a carrier indicator field CIF whose value is 0, and The second DCI format includes a CIF whose value is not 0, Wherein, the transceiver is further configured as: sending a physical uplink control channel PUCCH having hybrid automatic repeat request acknowledgement HARQ-ACK information for the first TB on the first cell, and sending a PUCCH with HARQ-ACK information for the second TB on the second cell, and, The first DCI format and the second DCI format include a field indicating a cell used for PUCCH transmission.

6. A base station, comprising: A transceiver, the transceiver being configured to: Receiving capability information for physical downlink control channel (PDCCH) reception on a downlink (DL) cell according to at least two (X, Y) combinations from a user equipment (UE), wherein: The PDCCH reception is performed in any symbol of a span, the length of the span is at most Y symbols in a time slot, and the number of symbols between the first symbols of two consecutive spans is X; and Sending configuration information of one or more search space sets for PDCCH reception on the DL cell; and a processor operably connected to the transceiver and configured to determine to send at least one PDCCH to the UE, wherein, if the UE indicates a capability to monitor at least one PDCCH according to the at least two combinations, and the UE is configured with one or more search space sets having first symbols of consecutive spans separated by at least X values ​​of one or more of the at least two combinations, then the combination for PDCCH monitoring is determined to be the combination having the largest X value among the one or more combinations, and Among them, a larger maximum number of PDCCH candidates is associated with a larger value of X. The transceiver is further configured to send at least one PDCCH to the UE on the DL cell based on the configuration information.

7. The base station according to claim 6, wherein: If the UE indicates a capability to monitor the at least one PDCCH according to the two combinations, and the UE is configured with one or more search space sets having first symbols of consecutive spans separated by at least larger X values ​​of the two combinations, then the combination for PDCCH monitoring is determined to be a first combination having a larger X value among the two combinations.

8. A method for receiving a physical downlink control channel (PDCCH) by a user equipment (UE), the method comprising: Sending capability information for performing physical downlink control channel PDCCH reception on a downlink DL cell according to at least two (X, Y) combinations, wherein the PDCCH reception is performed in any symbol of a span, the length of the span is at most Y symbols in a time slot, and the number of symbols between the first symbols of two consecutive spans is X; receiving configuration information of one or more search space sets for PDCCH reception on the DL cell; and If the UE indicates a capability to monitor at least one PDCCH according to the at least two (X, Y) combinations, and the UE is configured with one or more search space sets having first symbols of consecutive spans separated by at least X values ​​of one or more of the at least two (X, Y) combinations, determining to monitor at least one PDCCH according to a combination having a maximum X value among the one or more combinations, wherein a larger maximum number of PDCCH candidates is associated with a larger X value; and At least one PDCCH is received on the DL cell based on the configuration information.

9. The method of claim 8, wherein: Make sure to include: If the UE indicates a capability to monitor the at least one PDCCH according to the two combinations, and the UE is configured with one or more search space sets having first symbols of consecutive spans separated by at least larger X values ​​of the two combinations, then determining to monitor the at least one PDCCH according to a first combination having a larger X value among the two combinations.

10. A method for sending a physical downlink control channel (PDCCH) by a base station, the method comprising: Receiving capability information for physical downlink control channel (PDCCH) reception on a downlink (DL) cell from a user equipment (UE) according to at least two (X, Y) combinations, wherein the PDCCH reception is performed in any symbol of a span, the length of the span is at most Y symbols in a time slot, and the number of symbols between the first symbols of two consecutive spans is X; Sending configuration information of one or more search space sets for PDCCH reception on the DL cell; and Based on the configuration information, at least one PDCCH is sent to the UE on the DL cell, Wherein, if the UE indicates a capability of monitoring at least one PDCCH according to the at least two combinations, and the UE is configured with one or more search space sets having first symbols of consecutive spans separated by at least X values ​​of one or more of the at least two combinations, then the combination for PDCCH monitoring is determined to be a combination having a maximum X value among the one or more combinations, wherein a larger maximum number of PDCCH candidates is associated with a larger X value.

11. The method according to claim 10, wherein: If the UE indicates a capability to monitor the at least one PDCCH according to the two combinations, and the UE is configured with one or more search space sets having first symbols of consecutive spans separated by at least larger X values ​​of the two combinations, then the combination for PDCCH monitoring is determined to be a first combination having a larger X value among the two combinations.

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