WO2025201401A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication

Info

Publication number
WO2025201401A1
WO2025201401A1 PCT/CN2025/085016 CN2025085016W WO2025201401A1 WO 2025201401 A1 WO2025201401 A1 WO 2025201401A1 CN 2025085016 W CN2025085016 W CN 2025085016W WO 2025201401 A1 WO2025201401 A1 WO 2025201401A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
time
frequency
frequency resource
resource set
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/085016
Other languages
English (en)
Chinese (zh)
Inventor
樊波
邓雪菲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2025201401A1 publication Critical patent/WO2025201401A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to the field of communication technology, and in particular to a communication method and a communication device.
  • terminal devices need to perform blind detection of the physical downlink control channel (PDCCH) to obtain downlink control information (DCI). Locations where DCI transmissions may occur are called PDCCH candidates, and the process by which a terminal device decodes a PDCCH candidate is called PDCCH blind detection. Within the range where PDCCHs may be carried, the terminal device uses different parameter configurations (including control channel element (CCE) index, aggregation level, scrambling information, etc.) to perform a cyclic redundancy check (CRC). If the CRC check succeeds, the terminal device can obtain the corresponding DCI content. If not, the terminal device continues to blindly detect the PDCCH until it successfully detects the PDCCH or the maximum number of blind detections is reached.
  • CCE control channel element
  • CRC cyclic redundancy check
  • the terminal device performs blind detection on each PDCCH candidate, and each blind detection will go through processes such as descrambling, rate matching, decoding, and CRC checking, resulting in high blind detection complexity.
  • an embodiment of the present application provides a communication method, which can be applied to a terminal side, such as a terminal device or a communication module in a terminal device, or a circuit or chip in the terminal device responsible for a communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP chip) containing a modem core).
  • a terminal side such as a terminal device or a communication module in a terminal device, or a circuit or chip in the terminal device responsible for a communication function (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP chip) containing a modem core).
  • SoC system on chip
  • SIP chip system in package
  • the above method also includes: receiving configuration information, where the configuration information is used to configure the type of the first signal, and the type of the first signal corresponds to the time-frequency resource range of the first time-frequency resource set.
  • the first time-frequency resource set includes any one of the following items: a control resource set, a search space, a listening opportunity, and a PDCCH candidate.
  • the present application provides a communication device, which has the function of implementing the above-mentioned first aspect.
  • the communication device includes a module or unit or means corresponding to the operation involved in the above-mentioned first aspect.
  • the module or unit or means can be implemented by software, or by hardware, or by a combination of software and hardware.
  • the present application provides a communication device, which has the function of implementing the above-mentioned second aspect.
  • the communication device includes a module or unit or means corresponding to the operation involved in the above-mentioned second aspect.
  • the module or unit or means can be implemented by software, or by hardware, or by a combination of software and hardware.
  • the present application provides a communication device comprising a memory and one or more processors.
  • the memory is used to store part or all of the necessary computer programs or instructions for implementing the functions of the first aspect.
  • the one or more processors can execute the computer programs or instructions.
  • the communication device implements the method in any possible implementation of the first aspect.
  • the communication device may further include an interface circuit, wherein the processor is configured to communicate with other devices or components through the interface circuit.
  • the communication device may further include the memory.
  • the communication device may be a terminal device, or a communication module in the terminal device, or a chip in the terminal device responsible for communication functions such as a modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module.
  • a modem chip also known as a baseband chip
  • SoC SoC
  • SIP Session Initiation Protocol
  • the present application provides a communication device, comprising a memory and one or more processors.
  • the memory is used to store part or all of the necessary computer programs or instructions for implementing the functions of the second aspect.
  • the one or more processors can execute the computer programs or instructions.
  • the communication device implements the method in any possible implementation of the second aspect.
  • FIG1C is a schematic structural diagram of an O-RAN system provided in an embodiment of the present application.
  • FIG1D is a schematic structural diagram of an O-RAN device provided in an embodiment of the present application.
  • FIG2 is an example of a PDCCH configuration provided by an embodiment of the present application.
  • FIG3 is a flow chart of a communication method provided in an embodiment of the present application.
  • FIG4A is an example of time-frequency resources occupied by a first signal provided in an embodiment of the present application.
  • FIG5 is a flow chart of another communication method provided in an embodiment of the present application.
  • FIG6 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of a chip system provided in an embodiment of the present application.
  • references to "embodiments” herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application.
  • the appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It will be understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
  • At least one (item) refers to one or more
  • “more than one” refers to two or more
  • “at least two (items)” refers to two or three and more than three
  • "and/or” is used to describe the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural.
  • the character “/” generally indicates that the previous and next associated objects are in an “or” relationship.
  • “At least one of the following items” or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • At least one of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c", where a, b, c can be single or multiple.
  • PDCCH Physical downlink control channel
  • PDCCH can be used to transmit downlink control information (DCI), which is used to indicate: (1) downlink scheduling information, which is used for terminal devices to receive the physical downlink sharing channel (PDSCH); (2) uplink scheduling information (or uplink grants), which is used for terminal devices to send the physical uplink sharing channel (PUSCH); (3) other physical layer control information, such as slot format indicator (SFI), pre-emption indicator (PI), power control commands and other control signals, to assist terminal devices in receiving and sending data.
  • DCI downlink control information
  • a network device can schedule multiple terminal devices simultaneously in both uplink and downlink. This means that a network device can send multiple scheduling messages in each time slot. Each scheduling message is transmitted on a separate PDCCH. This means that a network device can send multiple PDCCHs simultaneously in a time slot.
  • CORESET is used to configure parameters related to the physical downlink control channel (PDCCH).
  • the terminal device determines the PDCCH-related parameters based on the parameters configured in the CORESET.
  • the PDCCH-related parameters can also be configured by the search space (SS).
  • CORESET can include the frequency domain resource information (such as occupied RBs) and time domain resource information (number of occupied symbols) of the PDCCH.
  • the network device can configure one or more CORESETs for the terminal device, and the one or more CORESETs can be used for different purposes.
  • a CORESET can be associated with one or more search spaces.
  • the search space includes the time domain parameters of the PDCCH, such as the occupied time domain symbols and time domain period. Combining the CORESET and its associated search space, the time-frequency resource position of the PDCCH can be determined, and the terminal device can perform blind detection of the PDCCH at the time-frequency resource position of the PDCCH.
  • the search space includes parameters related to PDCCH blind detection, such as the blind detection period (i.e., how many time slots the search space appears once), the monitoring occasion (MO) within a time slot (indicating which symbols within a time slot the PDCCH is located on), the PDCCH aggregation level (indicating how many frequency domain resources are used to carry the PDCCH), and the number of potential PDCCHs (or PDCCH candidates) for each aggregation level.
  • a search space can include one or more monitoring opportunities, specifically indicated by the monitoringSymbolsWithinSlot parameter.
  • the monitoringSymbolsWithinSlot parameter is a 14-bit bitmap, with each bit corresponding to an orthogonal frequency-division multiplexing (OFDM) symbol.
  • a bit value of 1 indicates that the OFDM symbol corresponding to the bit is the first OFDM symbol of a monitoring opportunity, that is, the number of consecutive OFDM symbols starting from the first OFDM symbol corresponds to one monitoring opportunity.
  • X is indicated by the duration parameter in the CORESET, which indicates the number of time-domain symbols occupied by the PDCCH. For example, if the monitoringSymbolsWithinSlot parameter value is 10000100000000, and the duration value in the associated CORESET is 3, then the search space has two listening opportunities: the first one is located in OFDM symbols 1 to 3, and the second one is located in OFDM symbols 6 to 8.
  • a PDCCH candidate is a potential PDCCH that the terminal device attempts to detect. PDCCH candidates are configured based on the aggregation level.
  • a network device can configure two PDCCH candidates with aggregation level 4 and four PDCCH candidates with aggregation level 8 for a terminal device. The terminal device then performs blind detection on the two PDCCH candidates with aggregation level 4 and the four PDCCH candidates with aggregation level 8.
  • Network devices configure PDCCH candidates to control the number of blind detections for each aggregation level, thereby limiting the complexity of PDCCH blind detection.
  • the time-frequency position of the PDCCH candidate for each specific aggregation level is calculated according to a specific formula. Terminal devices can determine the time-frequency position of the PDCCH candidate for each specific aggregation level and receive the PDCCH at that time-frequency position.
  • control resource set can refer to the configuration parameters of the PDCCH frequency domain information, and can be replaced by any other term that characterizes the PDCCH frequency domain information.
  • search space can refer to the configuration parameters of the PDCCH time domain information or the PDCCH blind detection information, and can be replaced by any other term that characterizes the PDCCH time domain information or the PDCCH blind detection information.
  • the listening opportunity can refer to the configuration parameters of the time domain position of the PDCCH in a time slot, and can be replaced by any other term that characterizes the time domain position of the PDCCH in a time slot (such as "monitoring opportunity”, “listening opportunity”, “monitoring opportunity”, etc.).
  • the alternative PDCCH can refer to the configuration parameters of the time-frequency resource position where the PDCCH may exist, and can be replaced by any other term that characterizes the time-frequency resource position where the PDCCH may exist (such as "PDCCH alternative", "PDCCH candidate position").
  • the communication system provided in an embodiment of the present application may include at least one network device and at least one terminal device.
  • the network device may be a device or module located on the network side of the aforementioned communication system and having corresponding communication functions.
  • the network device typically includes a communication module, circuit, or chip that performs the corresponding communication functions.
  • the network device may also include program instructions configured to perform the corresponding communication functions and corresponding program instructions.
  • the network device in the embodiments of the present application may be a radio access network (RAN) device or network element deployed in the RAN.
  • the network device may be a RAN device or a device capable of supporting the RAN device to implement the function, such as a chip system or a combination device or component capable of implementing the functions of the access network device, which may be installed in the RAN device.
  • a network device can be an access point (AP) in a Wi-Fi system, such as a home gateway, router, server, switch, bridge, etc.; a base station, a base station controller (BSC), a base transceiver station (BTS), a home base station, a baseband unit (BBU), a wireless relay node, a wireless backhaul node; it can also be an evolved node B (eNB) in a 4G system, or the next-generation eNB (ng-eNB) during the transition from 4G to 5G systems, or the next-generation base station (gNB) in a 5G system, or a RAN node that implements (part of) the functions of a gNB.
  • AP access point
  • a Wi-Fi system such as a home gateway, router, server, switch, bridge, etc.
  • BSC base station controller
  • BTS base transceiver station
  • BBU baseband unit
  • a wireless relay node a wireless backhaul node
  • a RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc.
  • the CU and DU can be separate units or included in the same network element, such as a baseband unit (BBU).
  • BBU baseband unit
  • the RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).
  • the network device can be a satellite or various future base stations.
  • the network device can be a macro base station, a micro base station, an indoor station, a relay node, or a donor node.
  • the network equipment may also utilize an open radio access network (O-RAN) architecture.
  • O-RAN open radio access network
  • FIG1C shows an example diagram of an O-RAN system.
  • the O-RAN system may include components other than those shown in FIG1C .
  • network equipment also known as access network equipment (RAN, for example, eNB, gNB, or next-generation access network equipment), communicates with the core network (CN) via a backhaul link and with user equipment (UE) via an air interface.
  • RAN access network equipment
  • UE user equipment
  • the baseband unit (BBU) in the access network equipment communicates with the CN via a backhaul link
  • the radio unit (RU) in the access network equipment communicates with at least one UE via an air interface.
  • the BBU communicates with at least one RU via a fronthaul link; the BBU and RU may or may not be co-located.
  • the BBU includes at least one control unit (CU) and at least one distributed unit (DU), which can communicate through at least one midhaul link.
  • CU control unit
  • DU distributed unit
  • Figure 1D illustrates the functional division and protocol layer structure of network elements in an O-RAN device.
  • the CU is a logical node that carries the Radio Resource Control (RRC), Service Data Adaptation Protocol (SDAP), Packet Data Convergence Protocol (PDCP), and other control functions of the access network device.
  • RRC Radio Resource Control
  • SDAP Service Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol
  • the CU connects to network nodes such as the core network through interfaces, such as the E2 interface.
  • the CU may have some core network functionality.
  • the CU e.g., the PDCP layer and higher layers
  • connects to the DU e.g., the Radio Link Control (RLC) layer and lower layers
  • RLC Radio Link Control
  • these interfaces may provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.).
  • F1AP is an application protocol for the F1 interface, which defines the F1 signaling process in some examples.
  • the F1 interface supports the control plane F1-C and the user plane F1-U.
  • the CU can be split into the CU-CP (Control Unit-Control Plane) and the CU-UP (Control Unit-User Plane).
  • the CU-CP is a logical node that carries the RRC layer and the PDCP-C (Control plane part of PDCP) layer and is used to implement the control plane functions of the CU.
  • the CU-CP can interact with network elements in the core network that implement control plane functions.
  • the network elements in the core network that implement control plane functions can be access and mobility function network elements, such as the Access and Mobility Management Function (AMF) in the 5G system.
  • the AMF network element is responsible for mobility management in the mobile network, such as location updates of terminal devices, registration of terminal devices with the network, and handover of terminal devices.
  • AMF Access and Mobility Management Function
  • the CU-UP is a logical node that carries the SDAP layer and the PDCP-U (User plane part of PDCP) layer and is used to implement the user plane functions of the CU.
  • the CU-UP can interact with network elements in the core network that implement user plane functions.
  • the network elements used to implement user plane functions in the core network for example, the user plane function (UPF) in the 5G system, are responsible for forwarding and receiving data in the terminal equipment.
  • UPF user plane function
  • the above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed.
  • the CU or DU can be configured to have functions of more protocol layers, or the CU or DU can be configured to have partial processing functions of the protocol layer.
  • the functions of the CU or DU can be divided according to the service type or other system requirements, such as division by delay, and the functions whose processing time needs to meet the smaller delay requirement are set in the DU, and the functions that do not need to meet the delay requirement are set in the CU.
  • a DU is a logical node that carries the Radio Link Control (RLC) layer, the Medium Access Control (MAC) layer, the Higher Physical (Higher PHY) layer, and other functions.
  • a DU can control at least one RU.
  • the DU connects to the RU via interfaces, which may be fronthaul interfaces.
  • the Higher PHY layer includes portions of the PHY layer processing, such as Forward Error Correction (FEC) encoding and decoding, scrambling, modulation, and demodulation.
  • FEC Forward Error Correction
  • the RU is a logical node that carries the Lower Physical Layer (Lower PHY) and Radio Frequency (RF) processing.
  • the RU can be a 3GPP Transmission Reception Point (TRP) or Remote Radio Head (RRH), or other similar functional entity.
  • the Low-PHY includes portions of the PHY processing, such as fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), digital beamforming, and filtering.
  • FFT fast Fourier transform
  • IFFT inverse fast Fourier transform
  • the RU communicates with one or more UEs over a wireless link.
  • the DU and RU may or may not be co-located.
  • the DU and RU exchange control plane information and user plane information via the Lower-Layer Split CUS-Plane (LLS-CUS) interface over the fronthaul link.
  • the LLS-CUS may include an LLS-C interface and an LLS-U interface that provide the control plane (C-Plane) and user plane (U-Plane), respectively.
  • the control plane (C-Plane) refers to the real-time control between the DU and RU.
  • the DU and RU exchange management information via the LLS-M interface of the fronthaul link, and the management plane (M-Plane) refers to the non-real-time management operations between the DU and RU.
  • the DU and RU can work together to implement the functions of the PHY layer.
  • a DU can be connected to one or more RUs.
  • the functions of the DU and RU can be configured in various ways according to the design.
  • the DU is configured to implement the baseband function
  • the RU is configured to implement the mid-RF function.
  • the DU is configured to implement the high-layer functions in the PHY layer
  • the RU is configured to implement the low-layer functions in the PHY layer or to implement the low-layer functions and the RF functions.
  • the high-layer functions in the physical layer may include a part of the functions of the physical layer, which is closer to the MAC layer
  • the low-layer functions in the physical layer may include another part of the functions of the physical layer, which is closer to the mid-RF side.
  • CU or CU-CP and CU-UP
  • DU or RU
  • RU may also be called O-RU.
  • O-CU Open CU
  • DU may also be called O-DU
  • CU-CP may also be called O-CU-CP
  • CU-UP may also be called O-CU-UP
  • RU may also be called O-RU.
  • this application uses CU, CU-CP, CU-UP, DU, and RU as examples for description.
  • a terminal device may be a device or module that accesses the above-mentioned communication system and has corresponding communication functions.
  • a terminal device may also be referred to as user equipment (UE), terminal, user device, access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, terminal unit, terminal station, terminal device, wireless communication device, user agent, or user device.
  • the terminal device is typically provided with a communication module, circuit, or chip that performs the corresponding communication function.
  • the terminal device is also configured with program instructions for performing the corresponding communication function.
  • the terminal device in the embodiment of the present application can be a mobile phone, a personal digital assistant (PDA), a laptop computer, a tablet computer, a drone, a computer with wireless transceiver function, a machine type communication (MTC) terminal, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an Internet of Things (IoT) terminal, an industrial control (industrial control) terminal, or a similar terminal.
  • PDA personal digital assistant
  • laptop computer a laptop computer
  • a tablet computer a drone
  • a computer with wireless transceiver function a machine type communication (MTC) terminal
  • MTC machine type communication
  • VR virtual reality
  • AR augmented reality
  • IoT Internet of Things
  • industrial control industrial control
  • Wireless terminals in industrial control wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home (such as game consoles, smart TVs, smart speakers, smart refrigerators and fitness equipment, etc.), transportation vehicles with wireless communication functions, communication modules, and road side units (RSU) with terminal functions.
  • RSU road side units
  • the communication system shown in Figure 1A includes a network device and multiple terminal devices (e.g., UE1 and UE2).
  • the network device can send downlink signals such as configuration information or downlink control information (DCI) to UE1 and UE2, and UE1 and UE2 can send uplink signals such as sounding reference signals (SRS) or physical uplink shared channels (PUSCH) to the network device.
  • DCI downlink control information
  • SRS sounding reference signals
  • PUSCH physical uplink shared channels
  • the communication system shown in Figure 1B includes a terminal device and multiple network devices (such as base station 1, base station 2 and base station 3 in Figure 1B).
  • base station 1, base station 2 and base station 3 can simultaneously transmit data and control signaling for the UE.
  • Each of the aforementioned communication devices may be configured with multiple antennas. These multiple antennas may include at least one transmit antenna for sending signals and at least one receive antenna for receiving signals.
  • the embodiments of this application do not limit the specific structure of each communication device.
  • the communication system may also include other network entities such as a network controller and a mobility management entity, but the embodiments of this application are not limited thereto.
  • FIGS 1A and 1B are simplified schematic diagrams for ease of understanding.
  • the communication system may also include other possible devices, such as wireless relay devices and wireless backhaul devices. Each device may also include different functional units, which are not shown in Figures 1A and 1B.
  • the communication between different devices involved in the embodiments of the present application may refer to direct communication between different devices (i.e., without the need for other devices to transfer or forward), or it may refer to communication between different devices through other devices (i.e., requiring other devices to transfer or forward), or it may refer to a functional unit within a device communicating with another device through another functional unit.
  • sending information to... (terminal) can be understood as the destination of the information being the terminal.
  • It can include sending information directly or indirectly to the terminal.
  • "Receiving information from... (terminal)” can be understood as the source of the information being the terminal, and can include receiving information directly or indirectly from the terminal.
  • the information may undergo necessary processing between the source and destination of the information transmission, such as format change, digital-to-analog conversion, amplification, filtering, etc., but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated here.
  • the terminal device needs to perform PDCCH blind detection to obtain DCI.
  • the location where DCI transmission may occur is called a PDCCH candidate, and the process by which the terminal device decodes the PDCCH candidate is called PDCCH blind detection.
  • the terminal device To decode the PDCCH, the terminal device must know the control channel element (CCE) index, aggregation level, and scrambling information of the PDCCH. However, this information is not communicated to the terminal device in advance.
  • the terminal device can only perform a cyclic redundancy check (CRC) within the range where the PDCCH may be carried, using different parameter configurations, including CCE index, aggregation level, and scrambling information. If the CRC check succeeds, the terminal device can obtain the corresponding DCI content. If not, the terminal device continues to blindly detect the PDCCH until it successfully detects the PDCCH or the maximum number of blind checks is reached.
  • CCE control channel element
  • a CORESET may correspond to multiple search spaces (such as SS1 and SS2), and a search space can have multiple listening opportunities in a time slot (such as MO1, MO2, and MO3 in SS1). There may be multiple PDCCH candidates in each listening opportunity ( Figure 2 uses two PDCCH candidates per listening opportunity as an example).
  • the terminal device performs blind detection at each location where a PDCCH candidate may exist. Each blind detection will go through processes such as descrambling, rate matching, decoding, and CRC checking, resulting in high blind detection complexity.
  • embodiments of the present application provide a communication method and a communication device that can reduce blind detection complexity and improve blind detection efficiency.
  • the method provided in embodiments of the present application can be applied to the communication system shown in FIG1A or FIG1B .
  • the interaction diagrams in this application use network devices and terminal devices as examples of the execution entities of the interaction diagrams to illustrate the method, but this application does not limit the execution entities of the interaction diagrams.
  • the network device in the interaction diagram can also be a chip, chip system, or processor that supports the network device to implement the method, or a logical node, logic module, or software that can implement all or part of the network device functions;
  • the terminal device in the interaction diagram can also be a chip, chip system, or processor that supports the terminal to implement the method.
  • Figure 3 is a flow chart of a communication method provided in an embodiment of the present application. As shown in Figure 3, the method includes but is not limited to the following steps.
  • a network device sends a first signal, and correspondingly, a terminal device detects the first signal.
  • the network device when the network device is implemented through multiple RAN nodes, for example, when the network device is a network device in the ORAN system, the network device sends a first signal, specifically, one of the O-CU, O-DU and O-RU sends the first signal, or multiple of the O-CU, O-DU and O-RU jointly send the first signal.
  • the time-frequency resources occupied by the first signal are associated with the first time-frequency resource set, and the first signal is used to determine (or indicate) that a PDCCH is sent on the first time-frequency resource set, or the first signal is used by the terminal device to determine (or judge) that the network device has sent a PDCCH to the terminal device on the first time-frequency resource set, or the first signal is used to indicate whether the terminal device needs to perform PDCCH detection on the first time-frequency resource set, or the first signal is used to indicate that the terminal device needs to perform PDCCH detection on the first time-frequency resource set, or the first signal is used by the terminal device to discover the PDCCH sent to the terminal device, and so on.
  • the network device sends the first signal when it determines that a PDCCH is actually transmitted.
  • the terminal device can detect the first signal, and thereby determine that a PDCCH is actually transmitted based on the first signal.
  • the terminal device determines to perform PDCCH detection on the first time-frequency resource set based on the first signal.
  • time-frequency resource set is for convenience of description and is not limited to the literal meaning.
  • the time-frequency resource set can be used to generally refer to the time-frequency resources associated with the time-frequency resources occupied by the first signal, and can be replaced by any other term representing the time-frequency resources.
  • the time-frequency resource set can also be replaced by descriptions such as "time-frequency resource location" and "time-frequency resource range.”
  • the name of the first signal may be a control discovery signal (CDS), indicating that it can be used by a terminal device to discover a PDCCH.
  • the name of the first signal may be a control detection signal (CDS), indicating that it can be used by a terminal device to detect a PDCCH.
  • CDS control discovery signal
  • the control discovery signal (CDS) indicates that for ease of description, this application does not limit the specific name of the first signal, and CDS may also be replaced by any other term representing a similar function.
  • the first signal may be a reference signal sent on the PDCCH, such as a demodulation reference signal (DMRS).
  • DMRS demodulation reference signal
  • the first signal may be a user-level (or terminal device-level) signal.
  • the first signal may be a sequence (e.g., a CDS sequence).
  • One user may correspond to one sequence or multiple different sequences.
  • different users may correspond to different sequences.
  • different users may also correspond to the same sequence, for example, multiple terminal devices may belong to the same user group, and all users in the user group may correspond to the same sequence.
  • the sequence may be generated in the same manner as a primary synchronization signal (PSS).
  • PSS primary synchronization signal
  • the terminal device may save the first signal of the user corresponding to the terminal device.
  • the terminal device detects the first signal within a first time-frequency resource range, where the first time-frequency resource range is determined by a second time-frequency resource range, where the second time-frequency resource range is a time-frequency resource range for PDCCH blind detection configured by the network device for the terminal device, or in other words, the second time-frequency resource range is a time-frequency resource range in which PDCCH transmission may exist.
  • the second time-frequency resource range includes one or more CORESETs and/or one or more search spaces configured by the network device for the terminal device.
  • the time domain resources included in the first time-frequency resource range and the time domain resources included in the second time-frequency resource range are the same.
  • the number of RBs (resource blocks) between the starting RB of the frequency domain resources included in the first time-frequency resource range and the ending RB of the frequency domain resources included in the second time-frequency resource range is less than or equal to a first threshold.
  • the number of RBs (resource blocks) between the ending RB of the frequency domain resources included in the first time-frequency resource range and the starting RB of the frequency domain resources included in the second time-frequency resource range is less than or equal to the first threshold.
  • the first threshold may be predefined by a protocol or configured by a network device.
  • the first time domain resource range includes multiple time-frequency resource positions where the first signal may exist
  • the second time-frequency resource range includes multiple time-frequency resource sets
  • the multiple time-frequency resource positions correspond one-to-one to the multiple time-frequency resource sets.
  • the terminal device detects the first signal at the multiple time-frequency resource positions; if the first signal is detected at any time-frequency resource position, the first signal and the first signal corresponding to the terminal device (such as the first signal stored by the terminal device) are subjected to correlation matching (or correlation detection); based on the correlation matching result, it is determined whether the received first signal is the first signal corresponding to the terminal device.
  • the correlation matching is successful, such as the correlation value exceeds the threshold, it means that the received first signal corresponds to the terminal device and the terminal device has successfully received the first signal; if the correlation matching fails, such as the correlation value does not exceed the threshold, it means that the received first signal does not correspond to the terminal device and the terminal device has failed to receive the first signal.
  • the network device sends a PDCCH based on a first time-frequency resource set.
  • the terminal device detects a first signal, it detects the PDCCH on the first time-frequency resource set.
  • the time-frequency resources occupied by the first signal are associated with the first time-frequency resource set.
  • the first time-frequency resource set is included in the second time-frequency resource range.
  • the second time-frequency resource range includes one or more time-frequency resource sets, and the one or more time-frequency resource sets include the first time-frequency resource set.
  • the terminal device can determine the first time-frequency resource set from the second time-frequency resource range based on the time-frequency resources of the first signal.
  • each of the one or more time-frequency resource sets can be associated with a first signal, and the terminal device detects the first signal associated with each time-frequency resource set.
  • the terminal device detects the first signal corresponding to the first time-frequency resource set, it determines that the network device has transmitted the PDCCH on the first time-frequency resource set, and performs a PDCCH blind detection on the first time-frequency resource set.
  • the terminal device does not detect the first signal corresponding to the first time-frequency resource set, it determines that the network device has not transmitted the PDCCH on the first time-frequency resource set, and there is no need to perform a PDCCH blind detection on the first time-frequency resource set, or the terminal device skips the first time-frequency resource set when performing the PDCCH blind detection.
  • the first time-frequency resource set may be any one of a CORESET, a search space, a listening opportunity, and a PDCCH candidate.
  • the first time-frequency resource set may include one or more PDCCH candidates, and the terminal device performs a CRC check on the one or more PDCCH candidates. If the CRC check succeeds, it is determined that the PDCCH is detected.
  • the time-frequency resources occupied by the first signal include first time domain resources, the first time-frequency resource set includes second time domain resources, the first time domain resources are the same as the second time domain resources, or the first time domain resources are partially the same as the second time domain resources.
  • the starting position of the first time domain resource is the same as the starting position of the second time domain resource.
  • the first time domain resource is the same as the second time domain resource, that is, the starting position of the first time domain resource is the same as the starting position of the second time domain resource, the ending position of the first time domain resource is the same as the ending position of the second time domain resource, or the time domain symbols included in the first time domain resource are the same as the time domain symbols included in the second time domain resource, or the time domain position of the first time domain resource is aligned with the time domain position of the second time domain resource.
  • the first time-frequency resource set is SS
  • the first time-frequency resource is aligned with the time domain position of the SS.
  • the first time domain resource is partially identical to the second time domain resource, or the first time domain resource is included in the second time domain resource, or the first time domain resource is aligned with part of the time domain resources in the second time domain resource.
  • the second time domain resource includes multiple MOs
  • the first time domain resource includes part of the MOs among the multiple MOs.
  • the first time domain resource includes the first MO among the multiple MOs.
  • the first time-frequency resource set is SS
  • the SS may include three MOs (namely MO1, MO2, and MO3), and the first time-frequency resource is aligned with the time domain position of the first MO (i.e., MO1) in SS1.
  • the number of frequency domain units between the frequency domain resources in the time-frequency resources occupied by the first signal and the frequency domain resources in the first time-frequency resource set is less than or equal to a first threshold.
  • the frequency domain resources in the time-frequency resources occupied by the first signal may be referred to as first frequency domain resources, and the frequency domain resources in the first time-frequency resource set may be referred to as second frequency domain resources.
  • the frequency domain unit can be an RB or a physical resource block (PRB), and the number of RBs between the starting RB of the first frequency domain resource and the ending RB of the second frequency domain resource is less than or equal to the first threshold, or the number of RBs between the ending RB of the first frequency domain resource and the starting RB of the second frequency domain resource is less than or equal to the first threshold.
  • PRB physical resource block
  • the starting RB of the first frequency domain resource is adjacent to the ending RB of the second frequency domain resource, that is, the number of RBs between the starting RB of the first frequency domain resource and the ending RB of the second frequency domain resource is 0.
  • the starting RB of the first frequency domain resource can be expressed as N Last +1, where N Last is the last RB (that is, the ending RB) of the second frequency domain resource, that is, the first frequency domain resource is located entirely behind the second frequency domain resource in the frequency domain.
  • the ending RB of the first frequency domain resource is adjacent to the starting RB of the second frequency domain resource, that is, the number of RBs between the ending RB of the first frequency domain resource and the starting RB of the second frequency domain resource is 0.
  • the starting RB of the first frequency domain resource can be expressed as N first -N RB , where N first is the first RB of the second frequency domain resource, and N RB is the number of RBs included in the first frequency domain resource, that is, the first frequency domain resource is entirely located in front of the second frequency domain resource in the frequency domain.
  • the number of frequency domain units included in the first frequency domain resource is related to the length of the first signal.
  • the number of frequency domain units contained in the first frequency domain resource is related to the length of the first signal and the number of time domain units contained in the first time domain resource.
  • the time domain unit may also be a time domain symbol or an OFDM symbol. The more time domain units the first time domain resource contains, the fewer resources the first signal occupies in the frequency domain, and the fewer frequency domain units the first frequency domain resource contains. That is, the number of frequency domain units contained in the first frequency domain resource is negatively correlated with the number of time domain units contained in the first time domain resource.
  • N RB N/(12*N OS )
  • N RB represents the number of frequency domain units included in the first frequency domain resource
  • N represents the length of the first signal
  • N OS represents the number of time domain units included in the first time domain resource.
  • the frequency domain resources occupied by the first signal can be flexibly adjusted according to the length of the first signal and the number of time domain units occupied by the first signal, thereby avoiding waste of resources.
  • the time-frequency resources of the first signal are associated with the first time-frequency resource set, and the first signal is used to indicate that there is actual transmission of PDCCH on the first time-frequency resource set.
  • the terminal device detects the first signal, it detects PDCCH on the first time-frequency resource set.
  • the terminal device does not detect the first signal, it does not detect PDCCH on the first time-frequency resource set.
  • Figure 5 is a flow chart of another communication method provided in an embodiment of the present application. As shown in Figure 5, the method includes but is not limited to the following steps.
  • the network device sends configuration information, and correspondingly, the terminal device receives the configuration information.
  • the configuration information is used to configure (or indicate) the type of the first signal, and the type of the first signal corresponds to the time-frequency resource range of the first time-frequency resource set.
  • the network device when the network device is implemented through multiple RAN nodes, for example, when the network device is a network device in the ORAN system, the network device sends configuration information, specifically, one of the O-CU, O-DU and O-RU sends the configuration information, or multiple of the O-CU, O-DU and O-RU jointly send the configuration information.
  • the type of the first signal is different, and the time-frequency resource range of the first time-frequency resource set is different.
  • the first time-frequency resource set includes a control resource set, and the time-frequency resource range of the first time-frequency resource set includes the time-frequency resource range of the control resource set, that is, the first signal of the first type is associated with the control resource set.
  • the first time-frequency resource set includes a search space, and the time-frequency resource range of the first time-frequency resource set includes the time-frequency resource range of the search space, that is, the first signal of the second type is associated with the search space.
  • the first time-frequency resource set when the type of the first signal is the third type, the first time-frequency resource set includes a listening opportunity, and the time-frequency resource range of the first time-frequency resource set includes the time-frequency resource range of the listening opportunity, that is, the first signal of the third type is associated with the listening opportunity.
  • the first time-frequency resource set when the type of the first signal is the fourth type, the first time-frequency resource set includes a PDCCH candidate, and the time-frequency resource range of the first time-frequency resource set includes the time-frequency resource range of the PDCCH candidate, that is, the first signal of the fourth type is associated with the PDCCH candidate. It can be seen from this that the type of the first signal is different, and the type of the first time-frequency resource set is also different.
  • the above-mentioned configuration information is used to configure the type of the first signal, and can also be replaced by the description: the configuration information is used to configure (or indicate) the type of the first time-frequency resource set associated with the first signal, or the configuration information is used to configure (or indicate) the type of the first time-frequency resource set.
  • the network device may configure (or indicate) the type of the first signal through the configuration information. For example, when a standard, protocol, system, or network specifies multiple types of first signals, or when a terminal device supports multiple types of first signals, the network device may configure one of the multiple types for the terminal device through the configuration information.
  • the network device carries a bitmap in the configuration information, where each bit of the bitmap corresponds to a type of the first signal, and the value of each bit is used to indicate whether the type of the first signal corresponding to the bit is adopted.
  • the bitmap includes a total of 4 bits, with bits 1 to 4 corresponding to the first type, the second type, the third type, and the fourth type, respectively.
  • a bit value of 1 indicates adoption and a value of 0 indicates non-adoption.
  • a bitmap of "1100" indicates that the types of the first signal adopted are the first type and the second type.
  • the terminal device can report the type of first signal supported by the terminal device to the network device, and the network device sends the configuration information based on the type of first signal supported by the terminal device.
  • the configuration information is used to instruct the terminal device to adopt or not adopt this type of first signal.
  • the configuration information configures (or indicates) that the first frequency domain resource is located in front of the second frequency domain resource in the frequency domain, or, the configuration information configures (or indicates) that the first frequency domain resource is located behind the second frequency domain resource in the frequency domain.
  • Example 2 The terminal device supports the first signal of the second type, and the type of the first signal configured by the network device is the second type.
  • the first signal of the second type is associated with a search space, and the time domain position of the first signal is the same as the time domain position of the first MO in the search space, or the time domain position of the first signal is the same as the time domain position of all MOs in the search space.
  • the starting RB of the frequency domain resources occupied by the first signal satisfies N Last + 1, where N Last is the last RB in the search space, i.e., the first signal is located entirely after the search space in the frequency domain.
  • N Last is the last RB in the search space
  • the starting RB of the frequency domain resources occupied by the first signal satisfies N first - N RB , where N first is the first RB in the search space, and N RB is the number of RBs occupied by the first signal , i.e., the first signal is located entirely after the search space in the frequency domain.
  • Example 4 The terminal device supports the fourth type of first signal, and the network device configures the first signal to be of type 4.
  • the fourth type of first signal is associated with a PDCCH candidate, and the time domain position of the first signal is the same as the time domain position of the PDCCH candidate.
  • the starting RB of the frequency domain resources occupied by the first signal satisfies N Last + 1, where N Last is the last RB of the PDCCH candidate, i.e., the first signal is located entirely after the PDCCH candidate in the frequency domain.
  • N Last is the last RB of the PDCCH candidate
  • the starting RB of the frequency domain resources occupied by the first signal satisfies N first - N RB , where N first is the first RB of the PDCCH candidate and N RB is the number of RBs occupied by the first signal, i.e., the first signal is located entirely after the PDCCH candidate in the frequency domain.
  • step 502 and step 503 can also refer to the specific implementation of step 301 and step 302 in Figure 3, which will not be described in detail here.
  • the communication device 600 may be a terminal-side device in the above embodiments, for example, a terminal device or a communication module in a terminal device, or a circuit or chip in the terminal device responsible for the communication function.
  • the communication unit 603 is used to receive configuration information.
  • the functions of the processing unit 602 may be implemented by one or more processors.
  • the processor may include a modem chip, or a system-on-chip (SoC) chip or SIP chip containing a modem core.
  • SoC system-on-chip
  • the functions of the communication unit 603 may be implemented by a transceiver circuit.
  • the communication device 600 may be the network device in the above embodiments, for example, a network device or a communication module in the network device, or a circuit or chip responsible for communication functions in the network device.
  • the communication unit 603 is configured to send a first signal; and the processing unit 602 is configured to send a PDCCH through the communication unit 603 based on a first set of time-frequency resources.
  • the communication unit 603 is also used to send configuration information.
  • each function may correspond to a functional unit, or two or more functions may be integrated into one functional unit.
  • all or part of the units may be integrated into one physical entity, or distributed across different physical entities.
  • the above-mentioned functional units may be implemented in the form of hardware, software, or a combination of hardware and software. Whether a function is executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
  • the functional unit in any of the above devices can be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASICs), or, one or more central processing units (CPUs), one or more microprocessors (MCUs), one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.
  • ASICs application specific integrated circuits
  • CPUs central processing units
  • MCUs microprocessors
  • DSPs digital signal processors
  • FPGAs field programmable gate arrays
  • the storage unit 601 may include a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory and/or a register.
  • the processing unit 602 may be one or more processors
  • the communication unit 603 may be a transceiver
  • the communication unit 603 may also be referred to as a transceiver unit, and may include a transmitting unit and/or a receiving unit
  • the transmitting unit may be a transmitter
  • the receiving unit may be a receiver
  • the transmitting unit and the receiving unit may be integrated into a single device, such as a transceiver.
  • the processor and the transceiver may be coupled, etc., and the embodiment of the present application does not limit the connection method between the processor and the transceiver.
  • the process of sending information in the above method can be understood as the process of the processor outputting the above information.
  • the processor When outputting the above information, the processor outputs the above information to the transceiver so that the transceiver can transmit it. After being output by the processor, the above information may also need to undergo other processing before reaching the transceiver.
  • the process of receiving information in the above method can be understood as the process of the processor receiving the input information.
  • the processor receives the input information
  • the transceiver receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to be processed further before being received by the processor.
  • the communication device 700 may further include one or more memories 730 for storing program instructions and/or data, etc.
  • the memory 730 is coupled to the processor 720.
  • the coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 720 may operate in conjunction with the memory 730.
  • the processor 720 may execute program instructions stored in the memory 730.
  • at least one of the one or more memories may be included in the processor.
  • the memory may include, but is not limited to, non-volatile memories such as hard disk drives (HDD) or solid-state drives (SSD), random access memories (RAM), erasable programmable read-only memories (EPROM), read-only memories (ROM), or portable read-only memories (CD-ROM).
  • the memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures and can be read and/or written by a computer (such as the communication device shown in this application), but is not limited to this.
  • the memory in the embodiments of the present application can also be a circuit or any other device that can realize a storage function, used to store program instructions and/or data.
  • the processor 720 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process software program data.
  • the memory 730 is primarily used to store software programs and data.
  • the transceiver 710 may include a control circuit and an antenna.
  • the control circuit is primarily used to convert baseband signals into radio frequency signals and process radio frequency signals.
  • the antenna is primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves.
  • Input/output devices such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user.
  • the processor 720 can read the software program in the memory 730, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 720 performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 720.
  • the processor 720 converts the baseband signal into data and processes the data.
  • the RF circuit and antenna may be provided independently of the processor performing baseband processing.
  • the RF circuit and antenna may be remotely arranged independent of the communication device.
  • the communication device shown in the embodiment of the present application may also have more components than those in FIG7 , and the embodiment of the present application is not limited thereto.
  • the method performed by the processor and transceiver shown above is only an example, and the specific steps performed by the processor and transceiver can refer to the method described above.
  • the chip system 800 is used to implement the operations performed by a communication device (such as a terminal device or a network device) in the above various method embodiments.
  • a communication device such as a terminal device or a network device
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de communication et un appareil de communication, qui sont appliqués au domaine technique des communications. Le procédé comprend les étapes suivantes : un dispositif de réseau envoie un premier signal et, sur la base d'un premier ensemble de ressources temps-fréquence, envoie un PDCCH ; et de manière correspondante, un dispositif terminal surveille le premier signal, et, lors de la détection du premier signal, détecte le PDCCH sur le premier ensemble de ressources temps-fréquence. Une ressource temps-fréquence occupée par le premier signal est associée au premier ensemble de ressources temps-fréquence. Au moyen des modes de réalisation de la présente demande, la complexité de la détection de PDCCH peut être réduite.
PCT/CN2025/085016 2024-03-29 2025-03-26 Procédé de communication et appareil de communication Pending WO2025201401A1 (fr)

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Citations (3)

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CN113676990A (zh) * 2020-05-15 2021-11-19 维沃移动通信有限公司 信息检测、发送方法、终端及网络侧设备
CN114270977A (zh) * 2019-08-15 2022-04-01 日本电气株式会社 下行链路控制信息的发送和接收
US20220322349A1 (en) * 2019-05-02 2022-10-06 Lg Electronics Inc. Method for transmitting or receiving signal in wireless communication system and apparatus for supporting same

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Publication number Priority date Publication date Assignee Title
US20220322349A1 (en) * 2019-05-02 2022-10-06 Lg Electronics Inc. Method for transmitting or receiving signal in wireless communication system and apparatus for supporting same
CN114270977A (zh) * 2019-08-15 2022-04-01 日本电气株式会社 下行链路控制信息的发送和接收
CN113676990A (zh) * 2020-05-15 2021-11-19 维沃移动通信有限公司 信息检测、发送方法、终端及网络侧设备

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