WO2021169821A1 - Procédé de détection de canal de commande de liaison descendante et dispositif associé - Google Patents

Procédé de détection de canal de commande de liaison descendante et dispositif associé Download PDF

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Publication number
WO2021169821A1
WO2021169821A1 PCT/CN2021/076513 CN2021076513W WO2021169821A1 WO 2021169821 A1 WO2021169821 A1 WO 2021169821A1 CN 2021076513 W CN2021076513 W CN 2021076513W WO 2021169821 A1 WO2021169821 A1 WO 2021169821A1
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Prior art keywords
sss
group
bwp
terminal device
sss group
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PCT/CN2021/076513
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English (en)
Chinese (zh)
Inventor
吴作敏
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Oppo广东移动通信有限公司
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Priority to CN202180006910.9A priority Critical patent/CN114747278A/zh
Publication of WO2021169821A1 publication Critical patent/WO2021169821A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This application relates to the field of communication technologies, and in particular, to a detection method and related devices of a downlink control channel.
  • BWP downlink DL bandwidth part
  • the embodiment of the present application provides a detection method and related device for a downlink control channel, which can effectively specify the PDCCH detection behavior of a terminal device during a BWP handover process.
  • an embodiment of the present application provides a method for detecting a downlink control channel, including:
  • the terminal device determines that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second BWP;
  • the terminal device detects the physical downlink control channel PDCCH on the second BWP according to the first search space set SSS configured on the second BWP.
  • an embodiment of the present application provides a method for detecting a downlink control channel, including:
  • the network device configures the first search space set SSS on the second bandwidth part BWP to the terminal device, and the second BWP is the BWP to which the downlink activated BWP in the first cell determined by the terminal device is switched from the first BWP, so The first SSS is used by the terminal equipment to detect the physical downlink control channel PDCCH on the second BWP.
  • an embodiment of the present application provides an apparatus for detecting a downlink control channel, which is applied to a terminal device.
  • the apparatus includes a processing unit and a communication unit, and the processing unit is configured to determine the downlink active bandwidth part in the first cell
  • the BWP is switched from the first BWP to the second BWP; and the physical downlink control channel PDCCH on the second BWP is detected by the communication unit according to the first search space set SSS configured on the second BWP.
  • an embodiment of the present application provides an apparatus for detecting a downlink control channel, which is applied to a network device.
  • the apparatus includes a processing unit and a communication unit, and the processing unit is configured to: 2.
  • the first search space set SSS on the BWP of the bandwidth part, the second BWP is the BWP to which the downlink active BWP in the first cell determined by the terminal device is switched from the first BWP, and the first SSS is used for all
  • the terminal device detects the physical downlink control channel PDCCH on the second BWP.
  • embodiments of the present application provide a terminal device, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured by The processor executes, and the program includes instructions for executing the steps in any method in the first aspect of the embodiments of the present application.
  • an embodiment of the present application provides a network device, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and are configured by The processor executes, and the program includes instructions for executing the steps in any method in the second aspect of the embodiments of the present application.
  • an embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that the device installed with the chip executes the first aspect or the second aspect of the embodiment of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the For example, part or all of the steps described in any method of the first aspect or the second aspect.
  • an embodiment of the present application provides a computer program, wherein the computer program is operable to cause a computer to execute part or all of the steps described in any method of the first aspect or the second aspect of the embodiment of the present application .
  • the computer program may be a software installation package.
  • the terminal device first determines that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second BWP; secondly, according to the first search space set SSS configured on the second BWP The physical downlink control channel PDCCH on the second BWP is detected. It can be seen that the PDCCH detection behavior on the activated BWP is implemented by the SSS configured on the currently activated BWP, which can effectively standardize the PDCCH detection behavior of the terminal device during the BWP handover process.
  • FIG. 1A is a system architecture diagram of an exemplary communication system provided by an embodiment of the present application.
  • FIG. 1B is a schematic diagram of a terminal device continuing to perform PDCCH detection in group 0 according to an embodiment of the present application;
  • FIG. 1C is a schematic diagram of a terminal device switching to perform PDCCH detection in group 0 according to an embodiment of the present application;
  • FIG. 1D is a schematic diagram of a terminal device switching to perform PDCCH detection in SSS group 1 according to an embodiment of the present application
  • FIG. 1E is a schematic diagram of a terminal device continuing to perform PDCCH detection in SSS group 1 according to an embodiment of the present application;
  • FIG. 1F is a schematic diagram of performing PDCCH detection after the end position of the time slot when the timer expires according to an embodiment of the present application
  • FIG. 1G is a schematic diagram of performing PDCCH detection after the end position of the COT length provided by an embodiment of the present application
  • FIG. 1H is a schematic diagram of determining SSS group handover according to whether DCI is detected in SSS group 0 according to an embodiment of the present application;
  • FIG. 1I is a schematic diagram of performing PDCCH detection after the end position of the time slot after the timer expires according to an embodiment of the present application
  • FIG. 1J is a schematic diagram of performing PDCCH detection after the end position of the COT length provided by an embodiment of the present application.
  • 2A is a schematic flowchart of a method for detecting a downlink control channel according to an embodiment of the present application
  • 2B is a schematic flowchart of another downlink control channel detection method provided by an embodiment of the present application.
  • FIG. 3 is a block diagram of functional units of a device for detecting a downlink control channel provided by an embodiment of the present application
  • FIG. 4 is a block diagram of functional units of another device for detecting downlink control channels provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the example communication system 100 may be, for example, a global system of mobile communication (GSM) system, a code division multiple access (Code Division Multiple Access, CDMA) system, and a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • New Radio, NR New Radio
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • the communication system in the embodiments of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) deployment.
  • CA Carrier Aggregation
  • DC dual connectivity
  • SA standalone
  • the embodiment of the application does not limit the applied frequency spectrum.
  • the embodiments of this application can be applied to licensed spectrum or unlicensed spectrum.
  • the terminal device 110 in the embodiment of the present application may refer to user equipment, access terminal equipment, user unit, user station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, user terminal equipment, terminal equipment, wireless communication Equipment, user agent, or user device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, relay devices, in-vehicle devices, wearable devices, terminal devices in the future 5G network or the public land mobile network that will evolve in the future (public land mobile network, The terminal equipment in the PLMN) is not limited in the embodiment of the present application.
  • the network device 120 in the embodiment of the present application may be a device for communicating with terminal devices.
  • the network device may be an evolved NodeB (eNB or eNodeB) in an LTE system, or a cloud wireless access network ( The wireless controller in the cloud radio access network (CRAN) scenario, or the network device can be a relay device, an access point, an in-vehicle device, a wearable device, and a network device in the future 5G network or a network device in the future evolved PLMN network Network equipment, one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or, it can also be a network node that constitutes a gNB or transmission point, such as a baseband unit (BBU), or distributed A distributed unit (DU), etc., is not limited in the embodiment of the present application.
  • BBU baseband unit
  • DU distributed A distributed unit
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements some of the functions of the gNB, and the DU implements some of the functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implements radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer functions.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing the physical layer protocol and real-time services, and realizes the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • AAU realizes some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , Or, sent by DU+AAU.
  • the network device may be a device that includes one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.
  • the terminal device 110 or the network device 120 includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application.
  • the execution subject of the method provided in the embodiment of the present application may be a terminal device, or a functional module in the terminal device that can call and execute the program.
  • Unlicensed spectrum is a spectrum that can be used for radio equipment communications divided by countries and regions. This spectrum is usually considered to be a shared spectrum, that is, communication devices in different communication systems as long as they meet the regulatory requirements set by the country or region on the spectrum. To use this spectrum, there is no need to apply for a proprietary spectrum authorization from the government. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist friendly on the spectrum, some countries or regions have stipulated the legal requirements that must be met when using unlicensed spectrum. For example, in some areas, communication equipment follows the principle of "Listen-Before-Talk (LBT)", that is, the communication equipment needs to perform channel listening before sending signals on channels of unlicensed spectrum.
  • LBT Listen-Before-Talk
  • the communication device can only perform signal transmission when the channel detection result is that the channel is idle; if the channel detection result of the communication device on the channel of the unlicensed spectrum is that the channel is busy, the communication device cannot perform signal transmission.
  • the duration of signal transmission by a communication device using a channel of an unlicensed spectrum cannot exceed a maximum channel occupation time (Maximum Channel Occupation Time, MCOT).
  • a terminal device can be configured with up to two search space sets groups (search space sets group, SSS group) to detect PDCCH.
  • search space sets group search space sets group, SSS group
  • the terminal device only needs to detect the PDCCH in one SSS group within a period of time.
  • the terminal device supports switching from detecting PDCCH in group 0 (also referred to as the first group) to detecting PDCCH in group 1 (also referred to as second group), or switching from detecting PDCCH in group 1 to detecting PDCCH in group 0.
  • the terminal equipment is configured in DCI 2-0 to indicate the Flag of SSS group switching
  • the terminal device is configured in the DCI 2-0 with the detection group indication Flag used to indicate the SSS group switching.
  • the terminal device can be configured with a detection group indication Flag corresponding to the serving cell.
  • the terminal device switches the SSS group according to the indication of the detected Flag
  • the terminal device If the terminal device does not receive DCI 2-0, the terminal device performs PDCCH detection in SSS group 0.
  • the terminal device performs PDCCH detection in SSS group 0, which specifically includes:
  • the terminal device If the terminal device receives the Flag indication 1, the terminal device performs PDCCH detection in the SSS group 1, and the terminal device starts the timer.
  • the terminal device switches from performing PDCCH detection in SSS group 1 to performing PDCCH detection in SSS group 0:
  • PDCCH detection is performed after the end of the time slot when the timer expires
  • PDCCH detection is performed after receiving the indicated COT length end position.
  • the SSS group switching has a certain time delay, as shown by the P1 symbol in FIG. 1B to FIG. 1G.
  • the SSS group switching starts from the next time slot after the time delay is met.
  • the terminal equipment determines whether to switch to group 1 according to whether DCI is detected in SSS group 0.
  • the terminal equipment is not configured with DCI 2-0 or the terminal equipment is configured with DCI 2-0 that does not include the detection group indication Flag for indicating SSS group switching.
  • the terminal equipment determines the switching of the SSS group according to whether the DCI is detected in the SSS group 0, as shown in Figure 1H,
  • the terminal device If the terminal device detects DCI in SSS group 0, the terminal device switches to perform PDCCH detection in SSS group 1.
  • the terminal device If the terminal device detects DCI (not limited to SSS group 0), the terminal device starts a timer.
  • the terminal device performs PDCCH detection in SSS group 1, when one of the following conditions is met, the terminal device switches to perform PDCCH detection in SSS group 0.
  • PDCCH detection is performed after the end of the time slot when the timer expires
  • the SSS group switching has a certain time delay, as shown by the P2 symbol in FIG. 1H to FIG. 1J.
  • the SSS group switching starts from the next time slot after the time delay is met.
  • BWP is defined in NR, including downlink BWP and uplink BWP.
  • the UE can be configured with a maximum of 4 downlink BWPs and 4 uplink BWPs.
  • the SSS group can be configured on at least one downlink BWP among the 4 downlink BWPs.
  • the UE can only activate one downlink BWP and one uplink BWP at most.
  • the UE may switch the activated BWP based on a signaling indication or a predefined rule. There are several ways:
  • the UE can switch to a default or initial BWP when the timer expires
  • the currently activated uplink BWP does not have RACH resources, and when the UE triggers the RACH process, it can switch from the currently activated BWP to the initial BWP to perform the RACH process;
  • the UE can switch to any uplink BWP configured with RACH resources to initiate RACH.
  • the activated BWP is switched from the first BWP to the second BWP, how to specify the PDCCH detection behavior of the terminal device is still inconclusive.
  • the PDCCH detection behavior of the terminal device includes at least one of the following.
  • the terminal device performs PDCCH detection according to the configured SSS.
  • the terminal device performs PDCCH detection according to the configured SSS group.
  • the terminal device performs PDCCH detection according to the configured first SSS.
  • the first SSS includes SSSs that do not belong to the SSS group.
  • the PDCCH detection behavior of the terminal device includes one of the following:
  • the terminal device performs PDCCH detection according to the configured first SSS.
  • the first SSS includes SSSs that are configured to belong to SSS group 0 and SSS group 1 at the same time; and/or,
  • the first SSS includes SSSs that belong to neither group 0 nor group 1.
  • the terminal device performs PDCCH detection according to the preset SSS group.
  • the default SSS group is group 0
  • the terminal device If the terminal device receives the indication of the flag (for example, the first handover indication information) of the first cell, the terminal device performs PDCCH detection on the second BWP in mode 1 (the above-mentioned explicit handover mode) according to the Flag indication.
  • the indication of the flag for example, the first handover indication information
  • the terminal device performs PDCCH detection on the second BWP in mode 1 (the above-mentioned explicit handover mode) according to the Flag indication.
  • the terminal device performs PDCCH detection according to the preset SSS group, such as group 0.
  • the terminal device performs PDCCH detection on the second BWP according to the SSS group to be detected determined in the first cell group (for example, in case 1 above).
  • the first cell belongs to the first cell group, and the PDCCH detection behavior in the first cell group is determined according to the second cell, and the first cell and the second cell are different cells.
  • the PDCCH detection behavior in the first cell group is determined according to the third cell; or, the PDCCH detection behavior in the first cell group is determined according to the first cell in the second BWP The detection behavior on the PDCCH is determined.
  • the terminal device performs PDCCH detection according to SSS group 0 on the first BWP, then after switching to the second BWP, the terminal device continues to perform PDCCH detection according to SSS group 0.
  • the terminal device performs PDCCH detection according to SSS group 1 on the first BWP, then after switching to the second BWP, the terminal device continues to perform PDCCH detection according to SSS group 1.
  • the terminal device performs PDCCH detection according to SSS group 0 on the first BWP, then after switching to the second BWP, the terminal device continues to perform PDCCH detection according to SSS group 0
  • the terminal device performs PDCCH detection according to SSS group 1 on the first BWP, then after switching to the second BWP, after meeting the following conditions, the terminal device performs PDCCH detection according to SSS group 0
  • the time when the terminal device starts to detect on the second BWP is after the end of the COT length indicated.
  • the BWP handover time delay is included in this activated BWP handover scenario.
  • FIG. 2A is a schematic flowchart of a method for detecting a downlink control channel according to an embodiment of the present application. As shown in the figure, the method includes:
  • Step 2A01 The terminal device determines that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second BWP;
  • Step 2A02 The network device configures the terminal device with the first search space set SSS on the second bandwidth part BWP, where the second BWP is the downlink activated BWP in the first cell determined by the terminal device that is switched from the first BWP to BWP, the first SSS is used by the terminal device to detect the physical downlink control channel PDCCH on the second BWP.
  • Step 2A03 The terminal device detects the physical downlink control channel PDCCH on the second BWP according to the first search space set SSS configured on the second BWP.
  • a search space set SSS group is not configured on the second BWP, and the first SSS includes at least one SSS configured on the second BWP.
  • a single SSS group is configured on the second BWP, and the first SSS includes at least one SSS in the single SSS group.
  • a single SSS group is configured on the second BWP, the first SSS includes at least one SSS configured on the second BWP, and the first SSS does not include SSS in the SSS group.
  • the second BWP is configured with SSS group 0 and SSS group 1, and the first SSS includes at least one SSS in the second SSS, where:
  • the second SSS includes SSSs that belong to both the SSS group 0 and the SSS group 1, and the second SSS includes SSSs that belong to neither the SSS group 0 nor the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first SSS includes at least one SSS in the first SSS group
  • the first SSS group is preset Or configured by a network device
  • the first SSS group is the SSS group 0 or the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the terminal device is configured with first handover indication information of the first cell, where:
  • the first SSS includes at least one SSS in the SSS group 0; or,
  • the first SSS includes at least one SSS in the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first SSS includes at least one SSS in the first SSS group
  • the first SSS group is preset Or configured by a network device
  • the first SSS group is the SSS group 0 or the SSS group 1
  • the terminal device is not configured with the first handover indication information of the first cell, or the terminal device has not received the first handover indication information of the first cell.
  • the second BWP is configured with SSS group 0 and SSS group 1, the first cell belongs to the first cell group, and the first SSS includes at least one SSS in the first SSS group , wherein the first SSB group is determined according to the identification of the SSS group detected by the terminal equipment on the second cell in the first cell group.
  • the second BWP is configured with SSS group 0 and SSS group 1, and no SSS group is configured or a single SSB group is configured on the first BWP, and the first SSS includes the first SSS group At least one SSS in, wherein the first SSS group is preset or configured by a network device, and the first SSS group is the SSS group 0 or the SSS group 1.
  • the first SSS group is the SSS group 0.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first BWP is configured with SSS group 0 and SSB group 1, where,
  • the terminal device detects the PDCCH according to the SSS group 0 on the first BWP before the BWP handover, the first SSS after the BWP handover includes at least one SSS in the SSS group 0; or,
  • the terminal device detects the PDCCH according to the SSS group 1 on the first BWP before the BWP switch, the first SSS includes at least one SSS in the SSS group 1 after the BWP switch.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first BWP is configured with SSS group 0 and SSB group 1, where,
  • the terminal device detects the PDCCH according to SSS group 1 on the first BWP before the BWP handover, and the time when the terminal device starts detection on the second BWP is after the first duration, then the first SSS includes At least one SSS in the SSS group 0.
  • the first duration is determined according to the duration of detecting the PDCCH by the SSS group 1 on the first BWP by the terminal device.
  • the terminal device first determines that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second BWP; secondly, it detects according to the first search space set SSS configured on the second BWP The physical downlink control channel PDCCH on the second BWP. It can be seen that the PDCCH detection behavior on the activated BWP is implemented by the SSS configured on the currently activated BWP, which can effectively standardize the PDCCH detection behavior of the terminal device during the BWP handover process.
  • the terminal device may be configured with a group of serving cells or a cell group, such as a first cell group, the first cell group includes at least one cell, and the at least one cell includes the first cell.
  • the terminal device can be configured with two SSS groups at most.
  • one SSS can be configured to belong to SSS group 0 and SSS group 1 at the same time.
  • the terminal device always needs to perform PDCCH detection in the SSS.
  • the switching of the SSS group includes at least one of the following two situations, as shown below, where the terminal device can switch the SSS group according to Case 1 or Case 2 either by preset or network device configuration .
  • the terminal device may determine, according to the configuration signaling of the network device, that the SSS group should be switched according to Case 1 or Case 2.
  • at least one cell in the first cell group is configured to indicate the detection group indication Flag for SSS group handover. If the Flags corresponding to all the cells in the at least one cell indicate the same value, the terminal device performs the SSS group switch according to Case 1. Switch.
  • at least two cells in the first cell group are configured to indicate the detection group indication Flag for SSS group handover, and if the Flags corresponding to the at least two cells in the at least two cells indicate different values, then the terminal device In case 2, the SSS group is switched.
  • the network device instructs the terminal device to switch the SSS group according to Case 1 or Case 2 through configuration signaling.
  • the terminal device only supports the switching of the SSS group according to the case 1, or the terminal device only supports the switching of the SSS group according to the case 2.
  • the terminal device reports to the network device whether it supports switching of the SSS group according to Case 1 or Case 2.
  • an embodiment of the present application also provides a schematic flowchart of another method for detecting a downlink control channel. As shown in FIG. 2B, the method includes:
  • Step 2B01 The terminal device determines the first cell group to which the first cell belongs.
  • Step 2B02 The terminal device determines the PDCCH detection behavior on the activated BWP in the first cell group.
  • the method for determining the PDCCH detection behavior on the activated BWP in the first cell group includes at least one of the following:
  • the terminal device determines the PDCCH detection behavior on the activated BWP in the first cell group through the SSS group switching rule in the SSS group explicit switching mode (that is, the aforementioned explicit switching mode) according to the indication of the Flag.
  • the terminal device determines the PDCCH detection behavior on the activated BWP in the first cell group according to the indication of the Flag of the second cell of the at least two cells through the SSS group handover rule in mode 1.
  • the second cell is the Pcell; or, if the at least two cells include a primary and secondary cell PScell, the second cell Is the Pscell; or, if the at least two cells include a special cell sPCell, the second cell is the sPCell.
  • the second cell is the cell with the smallest cell index or the cell with the largest cell index, or a preset cell or a cell configured by a network device.
  • the terminal device passes the preset according to the second cell in the first cell group.
  • the SSS group switching rule in the implicit switching of the SSS group determines the PDCCH detection behavior on the activated BWP in the first cell group.
  • the second cell is the Pcell; or, if the at least two cells include a primary and secondary cell PScell, the second cell Is the Pscell; or, if the at least two cells include a special cell sPCell, the second cell is the sPCell.
  • the second cell is the cell with the smallest cell index or the cell with the largest cell index, or a preset cell or a cell configured by a network device.
  • the second cell is any cell in the first cell group.
  • the terminal equipment determines the PDCCH on the activated BWP in the first cell group according to the second cell in the first cell group through the SSS group handover rule in the SSS group explicit handover mode or the SSS group implicit handover mode. Detection behavior.
  • the second cell is the Pcell; or, if the at least two cells include a primary and secondary cell PScell, the second cell Is the Pscell; or, if the at least two cells include a special cell sPCell, the second cell is the sPCell.
  • the second cell is the cell with the smallest cell index or the cell with the largest cell index, or a preset cell or a cell configured by a network device.
  • the terminal device uses the SSS group handover in mode 1 according to the second cell in the first cell group
  • the rule determines the PDCCH detection behavior on the activated BWP in the first cell group
  • the terminal device passes the SSS group in mode 2 according to the second cell in the first cell group
  • the handover rule determines the PDCCH detection behavior on the activated BWP in the first cell group.
  • the first cell group includes the first cell, and the PDCCH detection behavior of the terminal device on the activated BWP in the first cell is the same as the PDCCH detection behavior on the activated BWP in the first cell group.
  • the terminal device can activate the PDCCH detection behavior on the BWP according to the cell group determination method, that is, the terminal device has the same PDCCH detection behavior on the activated BWP of all cells in a cell group, thereby effectively standardizing the RRC configuration PDCCH detection behavior of the terminal device after it takes effect or during the BWP handover process.
  • the terminal device and the network device include hardware structures and/or software modules corresponding to the respective functions.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application may divide the terminal device and the network device into functional units according to the foregoing method examples.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or in the form of software program modules. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 3 shows a block diagram of the functional unit composition of a detection device for a downlink control channel.
  • the device 300 for detecting a downlink control channel is applied to a terminal device, and specifically includes a processing unit 302 and a communication unit 303.
  • the processing unit 302 is used to control and manage the actions of the terminal device.
  • the processing unit 302 is used to support the terminal device to perform steps 202-204 in FIG. 2A and other processes used in the technology described herein.
  • the communication unit 303 is used to support communication between the terminal device and other devices.
  • the terminal device may also include a storage unit 301 for storing program codes and data of the terminal device.
  • the processing unit 302 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the communication unit 303 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 301 may be a memory.
  • the processing unit 302 is a processor
  • the communication unit 303 is a communication interface
  • the storage unit 301 is a memory
  • the terminal device involved in the embodiment of the present application may be the terminal device shown in FIG. 3.
  • the processing unit 302 is used to perform any step performed by the terminal device in the above method embodiment, and when performing data transmission such as sending, it can optionally call the communication unit 303 to complete the corresponding operation .
  • the processing unit 302 can optionally call the communication unit 303 to complete the corresponding operation .
  • the processing unit 302 is configured to: determine that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second BWP; and use the communication unit according to the first search space set configured on the second BWP
  • the SSS detects the physical downlink control channel PDCCH on the second BWP.
  • the terminal device first determines that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second BWP; secondly, it detects according to the first search space set SSS configured on the second BWP The physical downlink control channel PDCCH on the second BWP. It can be seen that the PDCCH detection behavior on the activated BWP is implemented by the SSS configured on the currently activated BWP, which can effectively standardize the PDCCH detection behavior of the terminal device during the BWP handover process.
  • a search space set SSS group is not configured on the second BWP, and the first SSS includes at least one SSS configured on the second BWP.
  • a single SSS group is configured on the second BWP, and the first SSS includes at least one SSS in the single SSS group.
  • a single SSS group is configured on the second BWP, the first SSS includes at least one SSS configured on the second BWP, and the first SSS does not include SSS in the SSS group.
  • the second BWP is configured with SSS group 0 and SSS group 1, and the first SSS includes at least one SSS in the second SSS, where:
  • the second SSS includes SSSs that belong to both the SSS group 0 and the SSS group 1, and the second SSS includes SSSs that belong to neither the SSS group 0 nor the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first SSS includes at least one SSS in the first SSS group
  • the first SSS group is preset Or configured by a network device
  • the first SSS group is the SSS group 0 or the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the terminal device is configured with first handover indication information of the first cell, where:
  • the first SSS includes at least one SSS in the SSS group 0; or,
  • the first SSS includes at least one SSS in the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first SSS includes at least one SSS in the first SSS group
  • the first SSS group is preset Or configured by a network device
  • the first SSS group is the SSS group 0 or the SSS group 1
  • the terminal device is not configured with the first handover indication information of the first cell, or the terminal device has not received the first handover indication information of the first cell.
  • the second BWP is configured with SSS group 0 and SSS group 1, the first cell belongs to the first cell group, and the first SSS includes at least one SSS in the first SSS group , wherein the first SSB group is determined according to the identification of the SSS group detected by the terminal equipment on the second cell in the first cell group.
  • the second BWP is configured with SSS group 0 and SSS group 1, and no SSS group is configured or a single SSB group is configured on the first BWP, and the first SSS includes the first SSS group At least one SSS in, wherein the first SSS group is preset or configured by a network device, and the first SSS group is the SSS group 0 or the SSS group 1.
  • the first SSS group is the SSS group 0.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first BWP is configured with SSS group 0 and SSB group 1, where,
  • the terminal device detects the PDCCH according to the SSS group 0 on the first BWP before the BWP handover, the first SSS after the BWP handover includes at least one SSS in the SSS group 0; or,
  • the terminal device detects the PDCCH according to the SSS group 1 on the first BWP before the BWP switch, the first SSS includes at least one SSS in the SSS group 1 after the BWP switch.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first BWP is configured with SSS group 0 and SSB group 1, where,
  • the terminal device detects the PDCCH according to SSS group 1 on the first BWP before the BWP handover, and the time when the terminal device starts detection on the second BWP is after the first duration, then the first SSS includes At least one SSS in the SSS group 0.
  • the first duration is determined according to the duration of detecting the PDCCH by the SSS group 1 on the first BWP by the terminal device.
  • FIG. 4 shows a block diagram of the functional unit composition of another downlink control channel detection device.
  • the device 400 for detecting a downlink control channel is applied to a network device, and the network device includes a processing unit 402 and a communication unit 403.
  • the processing unit 402 is used to control and manage the actions of the network device.
  • the processing unit 502 is used to support the network device to perform steps 201 and 205 in FIG. 2A and/or other processes used in the technology described herein.
  • the communication unit 403 is used to support communication between the network device and other devices.
  • the network device may also include a storage unit 401 for storing program codes and data of the terminal device.
  • the processing unit 402 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the communication unit 403 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 401 may be a memory.
  • the processing unit 402 is a processor
  • the communication unit 403 is a communication interface
  • the storage unit 401 is a memory
  • the terminal device involved in the embodiment of the present application may be the network device shown in FIG. 4.
  • the processing unit 402 is configured to configure the first search space set SSS on the second bandwidth part BWP to the terminal device through the communication unit, where the second BWP is the downlink activation in the first cell determined by the terminal device The BWP to which the BWP is switched from the first BWP, and the first SSS is used by the terminal device to detect the physical downlink control channel PDCCH on the second BWP.
  • the terminal device first determines that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second BWP; secondly, it detects according to the first search space set SSS configured on the second BWP The physical downlink control channel PDCCH on the second BWP. It can be seen that the PDCCH detection behavior on the activated BWP is implemented by the SSS configured on the currently activated BWP, which can effectively standardize the PDCCH detection behavior of the terminal device during the BWP handover process.
  • a search space set SSS group is not configured on the second BWP, and the first SSS includes at least one SSS configured on the second BWP.
  • a single SSS group is configured on the second BWP, and the first SSS includes at least one SSS in the single SSS group.
  • a single SSS group is configured on the second BWP, the first SSS includes at least one SSS configured on the second BWP, and the first SSS does not include SSS in the SSS group.
  • the second BWP is configured with SSS group 0 and SSS group 1, and the first SSS includes at least one SSS in the second SSS, where:
  • the second SSS includes SSSs that belong to both the SSS group 0 and the SSS group 1, and the second SSS includes SSSs that belong to neither the SSS group 0 nor the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first SSS includes at least one SSS in the first SSS group
  • the first SSS group is preset Or configured by a network device
  • the first SSS group is the SSS group 0 or the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1, and the network device configures the terminal device with the first handover indication information of the first cell, where:
  • the first SSS includes at least one SSS in the SSS group 0; or,
  • the first SSS includes at least one SSS in the SSS group 1.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first SSS includes at least one SSS in the first SSS group
  • the first SSS group is preset Or configured by a network device
  • the first SSS group is the SSS group 0 or the SSS group 1
  • the terminal device is not configured with the first handover indication information of the first cell, or the terminal device has not received the first handover indication information of the first cell.
  • the second BWP is configured with SSS group 0 and SSS group 1, the first cell belongs to the first cell group, and the first SSS includes at least one SSS in the first SSS group , wherein the first SSB group is determined according to the identification of the SSS group detected by the terminal equipment on the second cell in the first cell group.
  • the second BWP is configured with SSS group 0 and SSS group 1, and no SSS group is configured or a single SSB group is configured on the first BWP, and the first SSS includes the first SSS group At least one SSS in, wherein the first SSS group is preset or configured by a network device, and the first SSS group is the SSS group 0 or the SSS group 1.
  • the first SSS group is the SSS group 0.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first BWP is configured with SSS group 0 and SSB group 1, where,
  • the terminal device detects the PDCCH according to the SSS group 0 on the first BWP before the BWP handover, the first SSS after the BWP handover includes at least one SSS in the SSS group 0; or,
  • the terminal device detects the PDCCH according to the SSS group 1 on the first BWP before the BWP switch, the first SSS includes at least one SSS in the SSS group 1 after the BWP switch.
  • the second BWP is configured with SSS group 0 and SSS group 1
  • the first BWP is configured with SSS group 0 and SSB group 1, where,
  • the terminal device detects the PDCCH according to SSS group 1 on the first BWP before the BWP handover, and the time when the terminal device starts detection on the second BWP is after the first duration, then the first SSS includes At least one SSS in the SSS group 0.
  • the first duration is determined according to the duration of detecting the PDCCH by the SSS group 1 on the first BWP by the terminal device.
  • FIG. 5 is a schematic structural diagram of a terminal device 500 provided by an embodiment of the present application.
  • the terminal device 500 includes a processor 510, a memory 520, a communication interface 530, and at least one A communication bus connecting the processor 510, the memory 520, and the communication interface 530.
  • the memory 520 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or Portable read-only memory (compact disc read-only memory, CD-ROM), the memory 520 is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • CD-ROM Compact disc read-only memory
  • the communication interface 530 is used to receive and send data.
  • the processor 510 may be one or more central processing units (CPUs). When the processor 510 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.
  • the processor 510 in the terminal device 500 is configured to read one or more program codes 521 stored in the memory 520, and perform the following operations: determine that the downlink active bandwidth part BWP in the first cell is switched from the first BWP to the second Two BWP; and calling the communication interface 530 to detect the physical downlink control channel PDCCH on the second BWP according to the first search space set SSS configured on the second BWP. .
  • each operation may also correspond to the corresponding description of the method embodiment shown in FIG. 2A, and the terminal device 500 may be used to execute the method on the terminal device side of the foregoing method embodiment of the present application.
  • the PDCCH detection behavior on the activated BWP is implemented by the SSS configured on the currently activated BWP, which can effectively standardize the PDCCH detection behavior of the terminal device during the BWP handover process.
  • FIG. 6 is a schematic structural diagram of a network device 600 provided by an embodiment of the present application.
  • the network device 600 includes a processor 610, a memory 620, a communication interface 630, and at least one A communication bus connecting the processor 610, the memory 620, and the communication interface 630.
  • the memory 620 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or A portable read-only memory (compact disc read-only memory, CD-ROM), the memory 620 is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • the communication interface 630 is used to receive and send data.
  • the processor 610 may be one or more central processing units (CPUs). When the processor 610 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.
  • the processor 610 in the terminal device 600 is configured to read one or more program codes 621 stored in the memory 620, and perform the following operations: call the communication interface 630 to configure the second bandwidth part BWP on the terminal device A search space set SSS, the second BWP is the BWP to which the downlink activated BWP in the first cell determined by the terminal device is switched from the first BWP, and the first SSS is used by the terminal device to detect the second 2.
  • each operation may also correspond to the corresponding description of the method embodiment shown in FIG. 2A, and the network device 600 may be used to execute the method on the network device side of the foregoing method embodiment of the present application.
  • the PDCCH detection behavior on the activated BWP is implemented by the SSS configured on the currently activated BWP, which can effectively standardize the PDCCH detection behavior of the terminal device during the BWP handover process.
  • the embodiment of the present application also provides a chip, wherein the chip includes a processor, which is used to call and run a computer program from the memory, so that the device installed with the chip executes the method described in the terminal device in the above method embodiment. Part or all of the steps.
  • the embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the terminal in the above method embodiment Some or all of the steps described by the device.
  • the embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the network in the above-mentioned method embodiment. Part or all of the steps described by the side device.
  • the embodiments of the present application also provide a computer program product, wherein the computer program product includes a computer program, and the computer program is operable to make a computer execute part or all of the steps described in the terminal device in the above method embodiment.
  • the computer program product may be a software installation package.
  • the steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), and erasable programmable read-only memory ( Erasable Programmable ROM (EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in an access network device, a target network device, or a core network device.
  • the processor and the storage medium may also exist as discrete components in the access network device, the target network device, or the core network device.
  • the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a Digital Video Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)) )Wait.

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Abstract

Sont divulgués ici un procédé de détection d'un canal de commande de liaison descendante et un dispositif associé. Le procédé comprend les étapes suivantes : un dispositif terminal commute une partie de bande passante (BWP) active de liaison descendante dans une première cellule d'une première BWP à une seconde BWP ; et le dispositif terminal détermine, en fonction de la première cellule, un comportement de détection d'un canal physique de commande de liaison descendante (PDCCH) sur la seconde BWP. Les modes de réalisation de la présente demande peuvent fournir efficacement un comportement de détection de PDCCH d'un dispositif terminal pendant une commutation de BWP.
PCT/CN2021/076513 2020-02-24 2021-02-10 Procédé de détection de canal de commande de liaison descendante et dispositif associé WO2021169821A1 (fr)

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