A method, apparatus, terminal, and network-side device for detecting a control channel

Abstract

The present invention provides a method, apparatus, terminal and network-side device for detecting a control channel. The method includes: a terminal receives a Synchronization Signal Block (SSB) sent by a network-side device; the terminal determines a detection method for a target Physical Downlink Control Channel (PDCCH) according to the SSB; the terminal detects the target PDCCH according to the detection method; wherein the detection method includes: a detection method based on an Extended Cyclic Prefix (ECP), or a detection method based on a Normal Cyclic Prefix (NCP). In an embodiment of the present application, the terminal determines a method for detecting a target PDCCH according to the SSB sent by the network-side device, including a detection method based on ECP or a detection method based on NCP. By flexibly configuring the detection method for the target PDCCH, the flexibility of the detection scheduling of the target PDCCH and the utilization rate of ECP subframes are improved, thereby enhancing the transmission efficiency of broadcast and multicast services.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a method, apparatus, terminal, and network-side device for detecting a control channel. Background Art

[0002] With the development of broadcast and multicast services, there is a need to support video streaming services with higher rates, such as high-definition television, augmented reality (AR) / virtual reality (VR) images. These services are characterized by the need for a relatively high data transmission rate. In future service deployments, high-definition television is transmitted in a broadcast mode, that is, relevant high-definition television services can be received without terminal feedback information.

[0003] In the prior art, in the initial access stage of the network, the terminal uses a normal cyclic prefix (NCP) to search for a synchronization signal block (SSB), and detects a physical downlink control channel (PDCCH) for scheduling access system messages, such as Type0-PDCCH, according to the configuration of the SSB. Summary of the Invention

[0004] The purpose of the present invention is to provide a method, apparatus, terminal, and network-side device for detecting a control channel, which solves the problem of poor flexibility in detecting the control channel in the current detection method.

[0005] An embodiment of the present invention provides a method for detecting a control channel, including:

[0006] The terminal receives a synchronization signal block (SSB) sent by the network-side device;

[0007] The terminal determines a detection method for a target physical downlink control channel (PDCCH) according to the SSB;

[0008] The terminal detects the target PDCCH according to the detection method;

[0009] Wherein, the detection method includes: a detection method based on an extended cyclic prefix (ECP), or a detection method based on a normal cyclic prefix (NCP).

[0010] Optionally, before determining a detection method for a target physical downlink control channel (PDCCH) according to the SSB, the method further includes:

[0011] The terminal determines, based on the SSB, that the cell indicated by the network - side device for transmitting multicast and broadcast services (MBS) is a dedicated cell.

[0012] Wherein, the dedicated cell is a cell that uses a single - frequency network (SFN) to transmit MBS services.

[0013] Optionally, determining the detection mode of the target physical downlink control channel (PDCCH) based on the SSB specifically includes:

[0014] If the cell indicated by the network - side device for transmitting MBS services is a dedicated cell, then determine the detection mode of the target PDCCH based on the SSB.

[0015] Optionally, determining that the cell indicated by the network - side device for transmitting multicast and broadcast MBS services is a dedicated cell based on the SSB includes:

[0016] Determine that the cell indicated by the network - side device for transmitting MBS services is a dedicated cell according to the indication status of the target field of the physical broadcast channel (PBCH) in the SSB;

[0017] Or,

[0018] Determine that the cell indicated by the network - side device for transmitting MBS services is a dedicated cell according to the bit positions carried by the PBCH in the SSB.

[0019] Optionally, determining that the cell indicated by the network - side device for transmitting MBS services is a dedicated cell according to the indication status of the target field of the PBCH in the SSB includes:

[0020] Determine that the cell indicated by the network - side device for transmitting MBS services is a dedicated cell according to the first status of the system information block (SIB) configuration information field in the PBCH;

[0021] Or,

[0022] Determine that the cell indicated by the network - side device for transmitting MBS services is a dedicated cell according to the second status of the sub - carrier offset field in the PBCH, where the sub - carrier offset is the sub - carrier offset between the physical resource block (PRB) of the synchronization signal block (SSB) and the PRB of the control resource set.

[0023] Optionally, determining that the cell for transmitting the MBS service indicated by the network side device is a dedicated cell according to the bit carried by the PBCH in the SSB includes:

[0024] Determining that the cell for transmitting the MBS service indicated by the network side device is a dedicated cell according to the first bit of the Master Information Block (MIB) field in the PBCH;

[0025] Or,

[0026] Determining that the cell for transmitting the MBS service indicated by the network side device is a dedicated cell according to the second bit carrying bit information in the PBCH.

[0027] Optionally, determining the detection method of the target physical downlink control channel PDCCH according to the SSB includes:

[0028] Determining the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH;

[0029] Or,

[0030] Determining the detection method of the target PDCCH according to the bit carried by the PBCH in the SSB.

[0031] Optionally, determining the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH includes:

[0032] If the first detection time slot of the target PDCCH is in the same time slot as the SSB, determining that the detection method in the first detection time slot is a detection method based on NCP;

[0033] If the first detection time slot of the target PDCCH is in a different time slot from the SSB, determining that the detection method in the first detection time slot is a detection method based on ECP.

[0034] Optionally, the positional relationship between the SSB and the target PDCCH is determined by the following method:

[0035] Determining the positional relationship between the SSB and the target PDCCH according to the detection occasion parameter of the target PDCCH.

[0036] An embodiment of the present invention provides a method for detecting a control channel, including:

[0037] The network side device sends an SSB to the terminal, and the SSB includes: first indication information for indicating the detection method of the target PDCCH;

[0038] Among them, the detection method includes: a detection method based on ECP, or a detection method based on NCP.

[0039] Optionally, the SSB further includes: second indication information for indicating whether the cell used by the network side device to send broadcast multicast MBS services is a dedicated cell;

[0040] Among them, the dedicated cell is a cell that uses a single-frequency network (SFN) to transmit MBS services.

[0041] Optionally, the detection method is: when the network side device uses the dedicated cell to send MBS services, the detection method of the terminal for the target PDCCH.

[0042] Optionally, the second indication information includes:

[0043] information about the indication status of the target field of the PBCH in the SSB;

[0044] Or,

[0045] information about the bit positions carried by the PBCH in the SSB.

[0046] Optionally, the target field includes:

[0047] the SIB configuration information field in the PBCH;

[0048] Or,

[0049] the subcarrier offset field in the PBCH, where the subcarrier offset is the subcarrier offset between the PRB of the SSB and the PRB of the control resource set.

[0050] Optionally, the bit positions include:

[0051] the first bit position of the MIB field in the PBCH;

[0052] Or,

[0053] the second bit position carrying bit information in the PBCH.

[0054] Optionally, the first indication information includes:

[0055] the detection timing parameter of the target PDCCH, where the detection timing parameter is used to determine the positional relationship between the SSB and the target PDCCH;

[0056] Or,

[0057] information about the bit positions carried by the PBCH in the SSB.

[0058] An embodiment of the present invention provides a terminal, including: a memory, a transceiver, and a processor:

[0059] The memory is used to store a computer program; the processor is used to read the computer program in the memory; the transceiver is used to send and receive data under the control of the processor and perform the following operations:

[0060] Receive a Synchronization Signal Block (SSB) sent by a network-side device;

[0061] The processor is used to read the computer program in the memory and perform the following operations:

[0062] Determine a detection method for a target Physical Downlink Control Channel (PDCCH) according to the SSB; detect the target PDCCH according to the detection method;

[0063] Wherein, the detection method includes: a detection method based on an Extended Cyclic Prefix (ECP), or a detection method based on a Normal Cyclic Prefix (NCP).

[0064] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0065] Determine that a cell for transmitting Multicast Broadcast Service (MBS) services indicated by the network-side device is a dedicated cell according to the SSB;

[0066] Wherein, the dedicated cell is a cell that transmits MBS services using a Single Frequency Network (SFN).

[0067] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0068] If the cell for transmitting MBS services indicated by the network-side device is a dedicated cell, determine a detection method for a target PDCCH according to the SSB.

[0069] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0070] Determine that a cell for transmitting MBS services indicated by the network-side device is a dedicated cell according to the indication status of a target field of a Physical Broadcast Channel (PBCH) in the SSB;

[0071] Or,

[0072] Determine that a cell for transmitting MBS services indicated by the network-side device is a dedicated cell according to the bits carried by the PBCH in the SSB.

[0073] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0074] Determine that the cell for transmitting the MBS service indicated by the network-side device is a dedicated cell according to the first state of the system information block SIB configuration information field in the PBCH;

[0075] Or,

[0076] Determine that the cell for transmitting the MBS service indicated by the network-side device is a dedicated cell according to the second state of the subcarrier offset field in the PBCH, where the subcarrier offset is the subcarrier offset between the physical resource block PRB of the synchronization signal block SSB and the PRB of the control resource set.

[0077] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0078] Determine that the cell for transmitting the MBS service indicated by the network-side device is a dedicated cell according to the first bit of the master information block MIB field in the PBCH;

[0079] Or,

[0080] Determine that the cell for transmitting the MBS service indicated by the network-side device is a dedicated cell according to the second bit carrying bit information in the PBCH.

[0081] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0082] Determine the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH;

[0083] Or,

[0084] Determine the detection method of the target PDCCH according to the bit carried by the PBCH in the SSB.

[0085] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0086] If the first detection time slot of the target PDCCH is in the same time slot as the SSB, determine that the detection method in the first detection time slot is the NCP-based detection method;

[0087] If the first detection time slot of the target PDCCH is in a different time slot from the SSB, determine that the detection method in the first detection time slot is the ECP-based detection method.

[0088] Optionally, the positional relationship between the SSB and the target PDCCH is determined in the following manner:

[0089] Determine the positional relationship between the SSB and the target PDCCH according to the detection timing parameter of the target PDCCH.

[0090] An embodiment of the present invention provides a network-side device, including: a memory, a transceiver, and a processor:

[0091] The memory is used for storing a computer program; the processor is used for reading the computer program in the memory; the transceiver is used for transmitting and receiving data under the control of the processor and performing the following operations:

[0092] Send an SSB to a terminal, where the SSB includes: first indication information for indicating a detection method of a target PDCCH;

[0093] Wherein, the detection method includes: a detection method based on ECP, or a detection method based on NCP.

[0094] Optionally, the SSB further includes: second indication information for indicating whether the cell used by the network-side device to send MBS services is a dedicated cell;

[0095] Wherein, the dedicated cell is a cell that uses a single-frequency network (SFN) to transmit MBS services.

[0096] Optionally, the detection method is: the detection method of the target PDCCH by the terminal when the network-side device uses the dedicated cell to send MBS services.

[0097] Optionally, the second indication information includes:

[0098] Information on the indication status of the target field of the PBCH in the SSB;

[0099] Or,

[0100] Information on the bit positions carried by the PBCH in the SSB.

[0101] Optionally, the target field includes:

[0102] The SIB configuration information field in the PBCH;

[0103] Or,

[0104] The subcarrier offset field in the PBCH, where the subcarrier offset is the subcarrier offset between the PRB of the SSB and the PRB of the control resource set.

[0105] Optionally, the bit positions include:

[0106] The first bit position of the MIB field in the PBCH;

[0107] Or

[0108] The second bit position carrying bit information in the PBCH.

[0109] Optionally, the first indication information includes:

[0110] The detection timing parameter of the target PDCCH, and the detection timing parameter is used to determine the positional relationship between the SSB and the target PDCCH;

[0111] Or

[0112] The information of the bit position carried by the PBCH in the SSB.

[0113] An embodiment of the present invention provides a device for detecting a control channel, including:

[0114] A first receiving unit, configured to receive a synchronization signal block SSB sent by a network-side device;

[0115] A first determining unit, configured to determine a detection method of a target physical downlink control channel PDCCH according to the SSB;

[0116] A detection unit, configured to detect the target PDCCH according to the detection method;

[0117] Wherein, the detection method includes: a detection method based on an extended cyclic prefix ECP, or a detection method based on a normal cyclic prefix NCP.

[0118] An embodiment of the present invention provides a device for detecting a control channel, including:

[0119] A first sending unit, configured to send an SSB to a terminal, where the SSB includes: first indication information for indicating a detection method of a target PDCCH;

[0120] Wherein, the detection method includes: a detection method based on ECP, or a detection method based on NCP.

[0121] An embodiment of the present invention provides a processor-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for detecting a control channel as described above are implemented.

[0122] The beneficial effects of the above technical solutions of the present invention are:

[0123] In an embodiment of the present application, the terminal determines a method for detecting a target PDCCH based on the SSB sent by the network-side device, including a detection method based on ECP or a detection method based on NCP. By flexibly configuring the detection method of the target PDCCH, the flexibility of the detection scheduling of the target PDCCH is achieved, and the utilization rate of ECP subframes is improved, thereby enhancing the transmission efficiency of broadcast and multicast services. Description of the Drawings

[0124] Figure 1 Schematic diagram showing the SSB structure of NR;

[0125] Figure 2 Schematic diagram showing one of the detection time slots of Type0-PDCCH;

[0126] Figure 3 Schematic diagram showing another detection time slot of Type0-PDCCH;

[0127] Figure 4 Schematic diagram showing the NCP time slot when the subcarrier spacing SCS is 15KHz;

[0128] Figure 5 Schematic diagram showing the ECP time slot when the subcarrier spacing SCS is 15KHz;

[0129] Figure 6 Schematic diagram showing one of the flowcharts of the method for detecting a control channel according to an embodiment of the present invention;

[0130] Figure 7 Schematic diagram showing the bit positions in the PBCH information according to an embodiment of the present invention;

[0131] Figure 8 Schematic diagram showing a third detection time slot of Type0-PDCCH according to an embodiment of the present invention;

[0132] Figure 9 Schematic diagram showing a fourth detection time slot of Type0-PDCCH according to an embodiment of the present invention;

[0133] Figure 10 Schematic diagram showing another flowchart of the method for detecting a control channel according to an embodiment of the present invention;

[0134] Figure 11 Schematic diagram showing one of the structures of the device for detecting a control channel according to an embodiment of the present invention;

[0135] Figure 12 Schematic diagram showing another structure of the device for detecting a control channel according to an embodiment of the present invention;

[0136] Figure 13 Schematic diagram showing the structure of the terminal according to an embodiment of the present invention;

[0137] Figure 14 A schematic structural diagram of the network-side device according to an embodiment of the present invention. Detailed implementation manners

[0138] To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present invention. Therefore, those skilled in the art should clearly understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. In addition, descriptions of known functions and configurations are omitted for clarity and conciseness.

[0139] It should be understood that the term "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0140] In various embodiments of the present invention, it should be understood that the magnitudes of the serial numbers of the following processes do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0141] The term "and / or" in the embodiments of the present invention describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0142] The term "plurality" in the embodiments of the present application means two or more, and other quantifiers are similar thereto.

[0143] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0144] When describing the embodiments of the present invention, some concepts used in the following description will be explained first.

[0145] One: SSB structure.

[0146] AsFigure 1 As shown, the SSB includes: Primary Synchronous Signal (PSS) / Secondary Synchronous Signal (SSS) / Physical Broadcast Channel (PBCH). Except that the symbol following the PSS and SSS is the PBCH, there is also PBCH data at both ends of the SSS. When the UE performs cell search, it conducts synchronous search based on the PSS / SSS. After completing the synchronous search, it receives the PBCH. In the prior art, the terminal has been using the NCP method to detect the SSB. At the same time, in order to reduce the complexity of the terminal, it can be considered that even in a dedicated carrier, the SSB is also transmitted in the NCP manner. For the SSB transmission in the low-frequency band, the number of SSBs transmitted by the base station can be 1 or 8, but at most no more than 8.

[0147] II: Detection of the Type0-PDCCH control channel.

[0148] For the existing 5G network, the terminal first detects the SSB (specifically: detects the synchronous signal and then parses the PBCH). Among them, the reception parameters of the Type0-PDCCH are indicated in the PBCH of the SSB. The terminal detects the PDCCH and the scheduled PDSCH data according to the reception parameters of the Type0-PDCCH, so as to obtain the system message in the 5G cell. Optionally, the Type0-PDCCH includes the following reception parameters:

[0149] (1) Reception parameter 1 of the Type0-PDCCH: Indication of the control resource set (CORSET#0) of the Type0-PDCCH.

[0150] The indication information includes the number of symbols occupied by CORSET#0 in the time domain (Number of Symbols), the number of resource blocks (Resource Block, RB) occupied in the frequency domain (Number of RBs), and the frequency domain offset (offset) between CORSET#0 and the SSB. The relevant configuration is fixed in the protocol in the form of a table. The base station determines the configuration information by indicating the row index in the PBCH, as shown in Table 1:

[0151] Table 1: Table of the control resource set (CORSET#0).

[0152]

[0153] (2) Reception parameter 2 of the Type0-PDCCH: Detection opportunity (Monitor Occasion, MO) of the Type0-PDCCH.

[0154] The receiving parameter 2 indicates the time-domain position for the terminal to detect the PDCCH, that is, in which time slots and on which symbols the Type0-PDCCH needs to be detected. This information appears in the protocol in the form of a configuration table (as shown in Table 2). What the base station indicates is the row index, and the terminal determines the configured content through the row index.

[0155] As shown in Table 2, where M is a parameter set for calculating the position of the Type0-PDCCH using a formula. O is a parameter for calculating the time slot of the Type0-PDCCH (which can be understood as the number of time slots relative to the 10 ms radio frame boundary), and i represents the row index number.

[0156] Table 2: PDCCH Detection Opportunity Configuration Table.

[0157]

[0158] Taking the index 0 in Table 1 (i.e., SSB 0) and the indices 0 (i.e., offset 0) and 2 (i.e., offset 2) in Table 2 as examples to illustrate the position and method of detecting the Type0-PDCCH.

[0159] As Figure 2 shown, taking the index 0 in Table 1 and the index 0 in Table 2, that is, there is only one SSB transmitted in this cell (SSB-0), and the offset for calculating the Type0-PDCCH time slot is 0. Assume that 2 Type0-PDCCHs in two consecutive time slots need to be detected:

[0160] On the base station side: One SSB is configured in one time slot, the index of the SSB is 0, and the first symbol of the Type0-PDCCH related to SSB 0 is on symbol 0 (i.e., #0 in Figure 2 ), #0 is located in slot 0. Since the offset between the first time slot and SSB 0 is 0, the time slots for two consecutive Type0-PDCCHs are slot0 and slot 1, that is, n0 = 0, n1 = 1.

[0161] On the terminal side: The terminal performs SSB search. After receiving the SSB, according to the indication parameter of the SSB, the first symbol of the Type0-PDCCH is on symbol 0, and the offset between the first time slot and SSB 0 is 0. After determining the value of n0, since 2 Type0-PDCCHs in two consecutive time slots need to be detected, it can be determined that the UE detects the Type0-PDCCH in time slots slot 0 and slot 1.

[0162] As Figure 3As shown in the figure, Index 0 in Table 1 and Index 2 in Table 2 are adopted. That is, there is only one SSB transmitted in this cell (SSB-0), and the offset when calculating the Type0-PDCCH time slot is 2. Suppose it is necessary to detect 2 Type0-PDCCHs in two consecutive time slots:

[0163] Base station side: One SSB is configured in one time slot. The index of the SSB is 0, and the first symbol of the Type0-PDCCH related to SSB 0 is on symbol 0 (i.e., #0 in Figure 2 ), and #0 is located in slot 0. Since the offset between the first time slot and SSB 0 is 2, the time slots of two consecutive Type0-PDCCHs should be located at the position offset by two time slots from slot 0, which are slot 2 and slot 3, that is, n0 = 2, n1 = 3.

[0164] Terminal side: The terminal conducts SSB search. After receiving the SSB, according to the indication parameters of the SSB, the first symbol of the Type0-PDCCH is on symbol 0, and the offset between the first time slot and SSB 0 is 2. After determining the value of n0, since it is necessary to detect 2 Type0-PDCCHs in two consecutive time slots, and the time slots of two consecutive Type0-PDCCHs should be located at the position offset by two time slots from slot 0, the UE detects the Type0-PDCCH on time slots slot 2 and slot 3.

[0165] Three: ECP and NCP.

[0166] The NR technology adopts Orthogonal Frequency Division Multiplexing (OFDM). In order to overcome the inter-symbol interference caused by multipath transmission, a Cyclic Prefix (CP) is inserted before the transmitted data symbol. The longer the CP in the time domain, the stronger the ability to resist multipath interference. The symbols / slots using the general length of CP are called NCP symbols / slots (general CP time slots); the symbols / slots using the longer length of CP are called ECP symbols / slots (extended CP time slots). The schematic diagrams of NCP and ECP with a subcarrier spacing of 15KHz are as shown in Figure 4 and Figure 5 shown.

[0167] Among them, when SCS = 15KHz, the length of one time slot is 1ms. When the symbols included in the time slot are NCP, one time slot includes 14 symbols. When the symbols included in the time slot are ECP, one time slot includes 12 symbols.

[0168] Four: Free to air (FTA) and dedicated cell.

[0169] FTA is a transmission mode for multi-cast broadcast service (MBS). Its main feature is that the terminal does not need to be authenticated and can directly receive. When deploying in the operator's network, it often adopts a separate deployment method, that is, the cell supporting FTA does not support the traditional unicast service, and only sends downlink MBS services. At the same time, in order to improve the transmission performance of MBS services, the SFN technology is used to transmit broadcast data.

[0170] There are two possible ways to transmit FTA services by implementing SFN:

[0171] (1): Adopt the hybrid cell method: That is, in a cell, it supports both unicast service data and broadcast service scheduling. Generally, unicast is transmitted in NCP time slots / symbols, and broadcast services are transmitted in ECP time slots / symbols. The advantage of this method is that terminals that need to receive both unicast and broadcast only need to camp on one cell. The resources of unicast and broadcast can be dynamically shared. The disadvantages are: the base station operation is complex, and when upgrading to an SFN network, it has an impact on the existing network and existing terminals, that is, there are compatibility problems.

[0172] (2): Dedicated cell method: That is, the base station sets up a dedicated cell specifically for the FTA broadcast service using the SFN transmission method, and only transmits broadcast services without transmitting unicast services. The advantage of this method is that the base station upgrade is simple and has no impact on the existing network and terminals, that is, there are no compatibility problems. The disadvantage is that UEs that need to receive this broadcast service need to camp on the dedicated cell of the SFN separately.

[0173] It should be noted that:

[0174] A: In the above method (2), the resources of the dedicated cell can be semi-statically shared with the unicast cell. For example, on a 20MHz carrier, the dedicated cell and the unicast cell are time-division multiplexed, and this time-division relationship is configured semi-statically (this configuration has been supported in R15);

[0175] B: In order to improve the spectrum resource utilization rate of the dedicated cell, it is necessary to configure as many ECP time slots as possible to transmit more broadcast service data.

[0176] In order to solve the problem that when the terminal detects the Type0-PDCCH in the prior art, the detection is performed according to the symbols of the NCP, resulting in a decrease in the transmission efficiency of broadcast and multicast services, and the flexibility of detecting and scheduling the Type0-PDCCH and the utilization rate of the ECP subframe cannot be effectively balanced, the embodiments of the present invention provide a method for detecting a control channel.

[0177] It should be noted that in the embodiments of the present application, the subcarrier SCS of Type0-PDCCH is taken as an example of 15 KHz, and other subcarrier spacing parameters can also be applied, such as SCS = 30 KHz, SCS = 60 KHz, SCS = 120 KHz, SCS = 240 KHz, SCS = 480 KHz, SCS = 960 KHz.

[0178] As Figure 6 shown, the method for detecting a control channel provided by the embodiments of the present invention specifically includes the following steps:

[0179] Step 61: The terminal receives a synchronization signal block SSB sent by the network side device.

[0180] Step 62: The terminal determines a detection method for a target physical downlink control channel PDCCH according to the SSB. Among them, the detection method includes: a detection method based on an extended cyclic prefix ECP, or a detection method based on a normal cyclic prefix NCP.

[0181] Step 63: The terminal detects the target PDCCH according to the detection method.

[0182] In this embodiment, the target PDCCH may be a Type0-PDCCH. The SSB may include relevant information for indicating the detection method of the target PDCCH. The detection method based on ECP refers to: a detection method that detects according to the symbol structure of ECP; the detection method based on NCP refers to: a detection method that detects according to the symbol structure of NCP. The symbol structures of ECP and NCP are as Figure 4 and Figure 5 shown.

[0183] The target PDCCH may be transmitted on an ECP symbol or an NCP symbol. The network side device flexibly indicates the CP type of the symbol where the target PDCCH is located by configuring a detection method corresponding to the transmission method of the target PDCCH. After the terminal determines the detection method of the target PDCCH according to the SSB, the detection opportunity of the target PDCCH can be obtained, which not only solves the problem of flexible deployment of the detection opportunity of the target PDCCH, but also can increase the utilization rate of ECP time slots, thereby improving the time slot utilization rate of a dedicated cell.

[0184] In the embodiments of the present application, the terminal determines the method for detecting the target PDCCH according to the SSB sent by the network side device, including a detection method based on ECP or a detection method based on NCP, realizing the flexibility of the detection scheduling of the target PDCCH and the maximization of the utilization rate of ECP subframes, thereby improving the transmission efficiency of broadcast multicast services.

[0185] As an optional embodiment, before determining the detection method of the target physical downlink control channel (PDCCH) according to the SSB, the method further includes:

[0186] The terminal determines, according to the SSB, that the cell indicated by the network side device for transmitting the multicast broadcast service (MBS) is a dedicated cell; wherein, the dedicated cell is a cell that uses a single-frequency network (SFN) to transmit the MBS service. In the embodiments of the present application, the MBS service may include one of a broadcast service, a multicast service, a broadcast service, and a multicast service.

[0187] Optionally, determining the detection method of the target physical downlink control channel (PDCCH) according to the SSB specifically includes: if the cell indicated by the network side device for transmitting the MBS service is a dedicated cell, determining the detection method of the target PDCCH according to the SSB.

[0188] In this embodiment, the SSB may further include indication information for indicating whether the cell used by the network side device to transmit the MBS service is a dedicated cell. After receiving the SSB, the terminal determines, according to the SSB, whether the cell indicated by the network side device for transmitting the MBS service is a dedicated cell, that is, determines whether the network side device uses an SFN dedicated cell to transmit the MBS service.

[0189] When the terminal determines that the network side device uses a dedicated cell to transmit the MBS service, determine that the detection method of the target PDCCH is a detection method based on ECP or a detection method based on NCP.

[0190] In this embodiment, when the network side device uses a dedicated cell to transmit the MBS service, the target PDCCH (such as Type0-PDCCH) may be transmitted on an ECP symbol or an NCP symbol. The network side device indicates the detection method of the target PDCCH through the SSB, and the terminal detects the target PDCCH according to the indicated detection method, which can realize the flexibility of the detection scheduling of the target PDCCH. When using a dedicated cell to transmit the MBS service, in order to improve the spectrum utilization rate, as many ECP subframes / slots as possible should be used for service transmission. The network side device can configure the subframes / slots using the SFN dedicated cell to transmit the MBS service and indicate the detection method for the terminal to perform the target PDCCH detection, so as to improve the utilization rate of the ECP subframes, thereby improving the spectrum resource utilization rate of the dedicated cell and enhancing the transmission efficiency of the multicast broadcast service.

[0191] Optionally, determining that the cell indicated by the network side device for transmitting the MBS service is a dedicated cell according to the SSB includes:

[0192] Method 1: Determine that the cell for transmitting MBS services indicated by the network - side device is a dedicated cell according to the indication status of the target field of the Physical Broadcast Channel (PBCH) in the SSB. The target field can be an existing field of the PBCH. For example, the reserved field with a row index of 15 shown in Table 1 indicates that the cell used by the network - side device to transmit broadcast and multicast services is a dedicated cell. The indication status of the target field may refer to the bit - combination status used to indicate the target field.

[0193] Or,

[0194] Method 2: Determine that the cell for transmitting MBS services indicated by the network - side device is a dedicated cell according to the bits carried by the PBCH in the SSB. For example, use the reserved bits in the PBCH to indicate that the cell used by the network - side device to transmit broadcast and multicast services is a dedicated cell.

[0195] It should be noted that in the embodiments of this application, for Method 1, the network - side device sets the reserved status of the existing target field (such as the index 15 in Table 1) to indicate whether the cell for transmitting MBS services is a dedicated cell. The target field in the PBCH may include multiple bits, and these multiple bits can be combined to indicate different configurations of the target PDCCH. When indicating the configuration of the target PDCCH, there may be some bit - combinations without corresponding indication information content (that is, the bit position has been used, but one or more of the bit - combinations do not indicate information content). For example, the pdcch - ConfigSIB field includes four indication statuses of bit - combinations: "00", "01", "10", "11". Among them, "00", "01", and "10" all indicate the corresponding information, and the combination status "11" does not indicate information content. Then, this "11" status can be used to indicate whether the cell is a dedicated cell. For example, when the terminal detects the "11" status of the target field, it is considered that the row index of Coreset#0 indicated by the PBCH is 15 by default, and at this time, the cell is a dedicated cell.

[0196] For Method 2, the PBCH includes multiple bits. Some of these bits are used to indicate existing fields (such as the MIB field), and there may be some bits that do not indicate fields (these bits are not used, that is, reserved bits). Then, by configuring these reserved bits, they can be used to indicate whether the cell for transmitting MBS services is a dedicated cell. The following is illustrated by specific embodiments.

[0197] Optionally, for the above-mentioned Method 1, the cell used for transmitting MBS services can be indicated as a dedicated cell by the reserved status of the existing fields of the PBCH. The reserved status of the existing fields refers to using one or more bit combinations (such as "00", "01", "10", "11") in the existing protocol to indicate an information configuration index or value (for example, N bits can represent 2 N states, but only some states are defined by the protocol, and the other states are reserved. For the reserved states, traditional UEs consider them illegal or assume that the base station will not configure the reserved states.

[0198] For the above-mentioned Method 1, determining that the cell indicated by the network-side device for transmitting MBS services is a dedicated cell according to the indication status of the target field of the PBCH in the SSB may include:

[0199] 1) Determine that the cell indicated by the network-side device for transmitting MBS services is a dedicated cell according to the first status of the system information block SIB configuration information field in the PBCH. The first status may be one of the multiple bit combination states used to indicate the SIB configuration information field. The SIB configuration information field may be the pdcch-ConfigSIB field, that is, the configuration for the terminal to receive the target PDCCH is indicated by pdcch-ConfigSIB. Assume that the bit combinations indicating the pdcch-ConfigSIB field include four states: "00", "01", "10", "11", and there is no corresponding indication information content for the state "11", then the state "11" can be used to indicate whether the cell is a dedicated cell.

[0200] Or,

[0201] 2) Determine that the cell indicated by the network-side device for transmitting MBS services is a dedicated cell according to the second status of the subcarrier offset (K SSB ) field in the PBCH. The subcarrier offset is the subcarrier offset between the physical resource block PRB of the synchronization signal block SSB and the PRB of the control resource set. The second status may be one of the multiple bit combination states used to indicate the subcarrier offset field. Assume that the bit combinations indicating the K SSB field include four states: "00", "01", "10", "11", and there is no corresponding indication information content for the state "00", then the state "00" can be used to indicate whether the cell is a dedicated cell.

[0202] The following uses a specific embodiment to illustrate the implementation process of the method for determining that the cell indicated by the network-side device for transmitting broadcast / multicast services is a dedicated cell according to the indication status of the target field of the PBCH in the above-mentioned Method 1.

[0203] Example 1: Take the case where the network side device sends the cell used for MBS services according to the first status of the pdcch-ConfigSIB field in the MIB as a dedicated cell.

[0204] pdcch-ConfigSIB can be used to indicate the configuration for the terminal to receive Type0-PDCCH, which occupies a total of 8 bits. Among them, 4 bits are used to indicate the configuration information of CORESET#0 (as shown in Table 1), and the other 4 bits are used to indicate the detection opportunity of Type0-PDCCH (as shown in Table 2). Among the 16 row indexes in Table 1, only 15 rows are valid. The 16th row (index 15) is a reserved bit, that is, the bit combination corresponding to the 16th row does not indicate information content. The content in the index of the 16th row can be defined, as shown in Table 3:

[0205] Table 3: CORESET#0 Table (configuring reserved bits).

[0206]

[0207]

[0208] As shown in Table 3, assuming that the 4 bits used to indicate CORESET#0 are "0, 1, 2, 3", the 4 bits can be combined in pairs to obtain 16 combined bit states (corresponding to indexes 0 to 15 respectively). When the terminal detects the PBCH, if it detects that the bit combination state indicating the control resource set (CORESET#0) is "11", it can be defaulted that the row index indicates 15, and the terminal can understand that the cell used for sending MBS services at this time is a dedicated cell. It should be noted that the number of RBs, the number of symbols, and the offset in Table 3 can also be configured as other parameters, which are not limited here.

[0209] Example 2: Take the case where the network side device sends the cell used for MBS services as a dedicated cell according to the second status of the K SSB field in the PBCH.

[0210] Among them, K SSB represents the subcarrier offset between the PRB of the SSB and the PRB of CORESET#0, which is represented by 5 bits (which can represent 32 combined bit states). Each combined bit state is represented by an index number, and a total of indexes 0 to 31 are included. Among them, from 0 to 23, the subcarrier offset is calculated according to the numerical value; when the value is greater than 23, it means that the Type0-PDCCH is not associated with this SSB. Further, the protocol also stipulates that when K SSB is from 24 to 29, it indicates the SSB frequency domain position related to the associated Type0-PDCCH. K SSBWhen it is 30 (i.e., the 31st row), it is in a reserved state. Therefore, the content in the indexes of the 31st row and the 32nd row (i.e., the values of K are 30 and 31) can be defined as shown in Table 4: SSB When the value of K is 30 and 31, the content in the indexes of the 31st row and the 32nd row (i.e., the values of K are 30 and 31) can be defined as shown in Table 4:

[0211] Table 4: K SSB Numerical meaning.

[0212]

[0213] As shown in Table 4, when the terminal detects the PBCH, if the result of the calculation of K SSB is 30 or 31, the terminal can understand that the cell is a dedicated cell. And according to the preset K SSB calculate the starting resource element (RE) position of the PRB of CORESET#0. The calculation method is the same as the existing technology and will not be elaborated here.

[0214] The following uses a specific embodiment to illustrate the implementation process of the method for determining that the cell indicating the transmission of the MBS service by the network side device is a dedicated cell according to the bit positions carried by the PBCH in the above-mentioned manner 2.

[0215] For the above-mentioned manner 2, determining that the cell indicating the transmission of the MBS service by the network side device is a dedicated cell according to the bit positions carried by the PBCH in the SSB includes:

[0216] 1) Determine that the cell indicating the transmission of the MBS service by the network side device is a dedicated cell according to the first bit position of the master information block MIB field in the PBCH; the first bit position can be: set the reserved bit position of the existing MIB field to make it the bit position indicating that the cell transmitting the MBS service is a dedicated cell, and the reserved bit position is the bit position not used for indicating information.

[0217] Or,

[0218] 2) Determine that the cell indicating the transmission of the MBS service by the network side device is a dedicated cell according to the second bit position carrying bit information in the PBCH. The second bit position can be: set the reserved bit position included in the existing PBCH to make it the bit position indicating that the cell transmitting the MBS service is a dedicated cell, and the reserved bit position is the bit position not used for indicating information.

[0219] For operations in the low frequency band, the reserved bit positions may include the following:

[0220] a: The reserved information bit position of the MIB field in the PBCH;

[0221] b: The Reserved bit positions, where A is the total length of the MIB information (it can be: A = 24). By setting any one or two of the above-mentioned bits, it can be used to indicate whether the cell used by the network side device to send MBS services is a dedicated cell.

[0222] As Figure 7 shown, the total length of the PBCH information is 0 to A + 7, where A = 24. 0 to A represents the length of the MIB information. Among them, A - 1 is the reserved bit position of the MIB field, and A + 6 and A + 7 are the reserved bit positions for the PBCH to carry bit information. By setting one or two of A - 1, A + 6, and A + 7, it can be used to indicate whether the cell used by the network side device to send MBS services is a dedicated cell.

[0223] For example: When setting one or two of the reserved bit positions to indicate whether the cell used by the network side device to send MBS services is a dedicated cell, it can be clearly pointed out that when and / or when it means that the cell where the terminal is located is a dedicated cell, that is, the cell used by the network side device to send MBS services is a dedicated cell.

[0224] As an optional embodiment, the determining the detection method of the target physical downlink control channel PDCCH according to the SSB includes:

[0225] Method (1): Determine the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH;

[0226] Or,

[0227] Method (2): Determine the detection method of the target PDCCH according to the bit positions carried by the PBCH in the SSB.

[0228] Optionally, for the method (1), the determining the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH includes:

[0229] If the first detection time slot of the target PDCCH is in the same time slot as the SSB, determine that the detection method in the first detection time slot is the detection method based on NCP;

[0230] If the first detection time slot of the target PDCCH is in a different time slot from the SSB, determine that the detection method in the first detection time slot is the detection method based on ECP.

[0231] In this embodiment, the first detection time slot may be the first time slot when the terminal needs to detect two or more consecutive time slots. The positional relationship between the SSB and the target PDCCH may be determined according to the detection timing parameter (such as offset) of the target PDCCH. Optionally, the positional relationship between the SSB and the target PDCCH is determined in the following manner: According to the detection timing parameter of the target PDCCH, determine the positional relationship between the SSB and the target PDCCH.

[0232] Taking two target PDCCHs that the terminal needs to detect two consecutive time slots (n0 and n1) as an example, that is, n0 is the first detection time slot. When n0 and the SSB are in the same time slot and the offset shown in Table 2 is 0 or 5, the target PDCCH on n0 is detected using the NCP-based detection method; the target PDCCH on n1 is detected using the ECP-based detection method, that is, the target PDCCH is sent in the form of NCP symbols in the n0 time slot and in the form of ECP symbols in the n1 time slot.

[0233] When n0 and the SSB are not in the same time slot and the offset shown in Table 2 is 2 or 7, the target PDCCH on n0 is detected using the ECP-based detection method, and the target PDCCH on n1 may also be detected using the ECP-based detection method. That is, the target PDCCH is sent in the form of ECP symbols in both the n0 time slot and the n1 time slot.

[0234] This method can maximize the utilization rate of ECP subframes, improve the spectrum resource utilization rate of dedicated cells, and thus enhance the transmission efficiency of broadcast and multicast services.

[0235] For the method (2), determining the detection method of the target PDCCH according to the bit carried by the PBCH in the SSB may include:

[0236] Determine the detection method of the target PDCCH according to the third bit of the MIB field in the PBCH. The third bit may be: setting the reserved bit in the existing MIB field that does not indicate information to be a bit indicating the detection method of the target PDCCH; or, determining the detection method of the target PDCCH according to the fourth bit carrying bit information in the PBCH. The fourth bit may be: setting the reserved bit in the existing PBCH that does not indicate information to be a bit indicating the detection method of the target PDCCH. The reserved bits of the MIB field and the reserved bits carrying bit information in the PBCH are as Figure 6As shown, any one or two of A-1, A+6, and A+7 can be used to indicate the detection method of the target PDCCH, which will not be elaborated here.

[0237] The following uses specific embodiments to illustrate the implementation process of determining the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH in the above-mentioned method (1).

[0238] Optionally, if the terminal determines that the cell used by the network-side device to send MBS services is a general cell, the terminal can detect all target PDCCHs using NCP according to the existing method. If the terminal determines that the cell used by the network-side device to send MBS services is a dedicated cell, the following method can be used to determine the CP type of the target PDCCH, that is, to determine the detection method of the target PDCCH.

[0239] Taking the target PDCCH as Type0-PDCCH and the terminal needs to detect two Type0-PDCCHs in two consecutive time slots (n0 and n1) as an example, according to the detection timing parameters of Type0-PDCCH, the detection timing of the Type0-PDCCH of the detected SSB is determined, including the following two cases:

[0240] Case 1: When the offset configured in Table 2 is 0 or Offset = 5 (that is, the detection time slot n0 of the first Type0-PDCCH of the SSB is in the same time slot as the SSB), then:

[0241] The detection of the Type0-PDCCH on n0 (the first detection opportunity) is performed using the NCP-based detection method;

[0242] The detection of the Type0-PDCCH on n1 (the second detection opportunity) is performed using the ECP-based detection method.

[0243] Case 2: When the offset configured in Table 2 is 2 or offset = 7 (that is, the detection time slot n0 of the first Type0-PDCCH of the SSB is not in the same time slot as the SSB), then:

[0244] The detection of the Type0-PDCCH on n0 (the first detection opportunity) is performed using the ECP-based detection method;

[0245] The detection of the Type0-PDCCH on n1 (the second detection opportunity) is performed using the ECP-based detection method.

[0246] For the above Case 1, when offset = 0, the Type0-PDCCH detection time slot is as Figure 8As shown; for the above-mentioned case 2, when offset = 2, the Type0-PDCCH detection time slot is as Figure 9 shown. This method can maximize the utilization rate of ECP subframes, improve the spectrum resource utilization rate of dedicated cells, and thus enhance the transmission efficiency of broadcast and multicast services.

[0247] The following uses specific embodiments to illustrate the implementation process of determining the detection method of the target PDCCH according to the bit positions carried by the PBCH in the SSB in the above-mentioned method (2).

[0248] In this embodiment, one or two combinations of the reserved bit positions of the bit information carried by the PBCH can be set to indicate whether the cell used by the network-side device to send MBS services is a dedicated cell and to indicate the detection method of the target PDCCH.

[0249] Example 1: By indicating whether the cell is a dedicated cell, and by indicating the detection method of the target PDCCH, as shown in Table 5:

[0250] Table 5: Using to judge dedicated cells, to judge the detection method.

[0251]

[0252] For example: Suppose the terminal needs to detect two Type0-PDCCHs in two consecutive time slots. For Table 5, assume that by it is indicated that the cell is a dedicated cell, and by it is indicated the determination method of the Type0-PDCCH in two time slots (n0 and n1). Then:

[0253] If then for the Type0-PDCCH in time slot n0, it is detected using the NCP-based detection method, and for the Type0-PDCCH in time slot n1, it is detected using the ECP-based detection method;

[0254] If then for the Type0-PDCCH in time slot n0, it is detected using the ECP-based detection method, and for the Type0-PDCCH in time slot n1, it is detected using the ECP-based detection method.

[0255] Example 2: By indicating whether the cell is a dedicated cell, and by indicating the detection method of the target PDCCH, as shown in Table 6:

[0256] ​Table 6: Using to determine a dedicated cell, and to determine the detection method.

[0257]

[0258] For example: Assume that the terminal needs to detect two Type0-PDCCHs in two consecutive time slots. For Table 6, assume that indicates that this cell is a dedicated cell, and through indicates the determination method of the Type0-PDCCH in two time slots (n0 and n1). Then:

[0259] If then for the Type0-PDCCH in time slot n0, it is detected using the ECP-based detection method, and for the Type0-PDCCH in time slot n1, it is detected using the ECP-based detection method;

[0260] If then for the Type0-PDCCH in time slot n0, it is detected using the NCP-based detection method, and for the Type0-PDCCH in time slot n1, it is detected using the ECP-based detection method.

[0261] Example 3: Through the combination of and it is indicated whether this cell is a dedicated cell (if any bit is 1), and through it is indicated the detection method of the target PDCCH in time slot n0, and through it is indicated the detection method of the target PDCCH in time slot n1, as shown in Table 7:

[0262] Table 7: Using the combination of and to determine the dedicated cell and the detection method.

[0263]

[0264] For example: Assume that the terminal needs to detect two Type0-PDCCHs in two consecutive time slots. For Table 7, assume that the combination of and indicates that this cell is a dedicated cell (if any bit is 1, it means this cell is a dedicated cell), and through it is indicated the detection method of the Type0-PDCCH in the first time slot (n0), and it is indicated the detection method of the Type0-PDCCH in the second time slot (n1). Then:

[0265] If Then, for the Type0-PDCCH in the n0 time slot, detection is performed using the NCP-based detection method, and for the Type0-PDCCH in the n1 time slot, detection is performed using the ECP-based detection method;

[0266] If Then, for the Type0-PDCCH in the n0 time slot, detection is performed using the ECP-based detection method, and for the Type0-PDCCH in the n1 time slot, detection is performed using the NCP-based detection method;

[0267] If Then, for the Type0-PDCCH in the n0 time slot, detection is performed using the ECP-based detection method, and for the Type0-PDCCH in the n1 time slot, detection is performed using the ECP-based detection method.

[0268] In this embodiment, the terminal determines that the cell used by the network-side device to send broadcast and multicast services according to the SSB is a dedicated cell, and determines the detection method of the target PDCCH in different time slots according to the SSB. In the case of the deployment of the dedicated cell, the CP type of the symbol where the target PDCCH is located is flexibly indicated, realizing the maximum utilization rate of the ECP time slot, solving the problem of the flexible deployment of the detection opportunity of the target PDCCH, and at the same time increasing the proportion of the ECP time slot, thereby improving the time slot utilization rate of the dedicated cell and enhancing the transmission efficiency of the broadcast and multicast services.

[0269] Optionally, in the embodiment of the present application, in the case where the terminal determines that the cell indicated by the network-side device for sending broadcast and multicast services according to the SSB is a dedicated cell, it can be defaulted that the network-side device only configures 1 NCP time slot to transmit the target PDCCH (for example, time slot n0), and the NCP time slot and the SSB are in the same time slot (for example, the offset O is 0 or 5). In this way, by reducing the detection opportunity of the target PDCCH (that is, reducing from the original 2 time slots to 1 time slot), the purpose of increasing the configured ECP time slot is achieved, improving the time slot utilization rate of the dedicated cell and enhancing the transmission efficiency of the broadcast and multicast services.

[0270] In the embodiment of the present application, the terminal determines the method for detecting the target PDCCH according to the SSB sent by the network-side device, including the ECP-based detection method or the NCP-based detection method. By flexibly configuring the detection method of the target PDCCH, the flexibility of the detection scheduling of the target PDCCH and the utilization rate of the ECP subframe are improved, thereby enhancing the transmission efficiency of the broadcast and multicast services.

[0271] As Figure 10 shown, the embodiment of the present application also provides a method for detecting a control channel, including:

[0272] Step 101: The network device sends an SSB to the terminal. The SSB includes: first indication information for indicating the detection method of the target PDCCH.

[0273] Among them, the detection method includes: a detection method based on ECP, or a detection method based on NCP.

[0274] In this embodiment, the target PDCCH may be a Type0-PDCCH. The SSB may include relevant information for indicating the detection method of the target PDCCH. The detection method based on ECP refers to: a detection method of detecting according to the symbol structure of ECP; the detection method based on NCP refers to: a detection method of detecting according to the symbol structure of NCP. The symbol structures of ECP and NCP are as Figure 4 and Figure 5 shown.

[0275] The target PDCCH may be transmitted on an ECP symbol or an NCP symbol. The network device indicates to the terminal the detection method for the target PDCCH through the SSB, that is, if the target PDCCH is transmitted on an ECP symbol, the terminal is indicated to use the detection method based on ECP to detect the target PDCCH through the SSB; if the target PDCCH is transmitted on an NCP symbol, the terminal is indicated to use the detection method based on NCP to detect the target PDCCH through the SSB.

[0276] After the terminal determines the detection method of the target PDCCH according to the SSB, it can obtain the detection opportunity of the target PDCCH, which not only solves the problem of flexible deployment of the detection opportunity of the target PDCCH, but also can increase the utilization rate of ECP time slots, thereby improving the time slot utilization rate of the dedicated cell.

[0277] In the embodiment of the present application, the network device can configure for the terminal the detection method for the target PDCCH according to the transmission method of the target PDCCH, realize the flexibility of the detection scheduling of the target PDCCH and the maximization of the utilization rate of ECP subframes, thereby improving the transmission efficiency of broadcast multicast services.

[0278] As an optional embodiment, the SSB further includes: second indication information for indicating whether the cell used by the network device to send MBS services is a dedicated cell; among them, the dedicated cell is a cell that uses a single-frequency network (SFN) to transmit MBS services.

[0279] Optionally, the detection method is: the detection method of the terminal for the target PDCCH when the network device uses the dedicated cell to send MBS services.

[0280] In this embodiment, the network - side device may also indicate whether the cell used for transmitting MBS services is a dedicated cell through the SSB. After receiving the SSB, the terminal determines whether the cell indicated by the network - side device for transmitting MBS services is a dedicated cell according to the SSB, that is, determines whether the network - side device uses an SFN dedicated cell to transmit MBS services.

[0281] When the terminal determines that the network - side device uses a dedicated cell to transmit MBS services, it determines that the detection method of the target PDCCH is a detection method based on ECP or a detection method based on NCP. Among them, when the network - side device uses a dedicated cell to transmit MBS services, the target PDCCH can be transmitted on ECP symbols or NCP symbols. Then, the network - side device can indicate the detection method of the target PDCCH through the SSB, and the terminal detects the target PDCCH according to the indicated detection method, which can realize the flexibility of the detection scheduling of the target PDCCH. By configuring the detection method of the target PDCCH, the utilization rate of ECP sub - frames can be improved, thereby improving the utilization rate of spectrum resources of dedicated cells and enhancing the transmission efficiency of broadcast and multicast services.

[0282] Optionally, the second indication information includes: information on the indication status of the target field of the PBCH in the SSB; or, information on the bits carried by the PBCH in the SSB.

[0283] In this embodiment, the network - side device indicates whether the cell used for transmitting MBS services is a dedicated cell through the indication status of the target field of the PBCH in the SSB (for example: by setting the reserved field with a row index of 15 shown in Table 1 to indicate that the cell used by the network - side device to transmit MBS services is a dedicated cell) or the bits carried by the PBCH in the SSB (for example: using the reserved bits in the PBCH to indicate that the cell used by the network - side device to transmit MBS services is a dedicated cell).

[0284] Optionally, the target field includes: the SIB configuration information field in the PBCH (such as the pdcch - ConfigSIB field in the MIB); or, the sub - carrier offset field in the PBCH (such as the K SSB field), where the sub - carrier offset is the sub - carrier offset between the PRB of the SSB and the PRB of the control resource set.

[0285] In this embodiment, the terminal determines that the cell indicated by the network - side device for transmitting MBS services is a dedicated cell according to the first status of the system information block SIB configuration information field in the PBCH; or, the terminal determines according to the sub - carrier offset (K SSBThe second state of the field determines that the cell for transmitting the MBS service indicated by the network side device is a dedicated cell. The specific implementation process for the terminal to determine whether the cell used by the network side device to transmit the MBS service is a dedicated cell based on the target field will not be elaborated here.

[0286] Optionally, the bit positions include: the first bit position of the MIB field in the PBCH; or, the second bit position carrying bit information in the PBCH. The first bit position can be a bit position obtained by setting the reserved bit position of the MIB field to indicate whether the cell for transmitting the MBS service is a dedicated cell. The second bit position can be a bit position obtained by setting the reserved bit position in the PBCH to indicate whether the cell for transmitting the MBS service is a dedicated cell.

[0287] In this embodiment, the reserved bit positions may include the following:

[0288] a: The reserved bit position of the MIB field in the PBCH;

[0289] b: The reserved bit position for the PBCH to carry bit information, where A is the total length of the MIB information (it can be: A = 24). By setting any one or two of the above information, it can be made to indicate whether the cell used by the network side device to transmit the MBS service is a dedicated cell.

[0290] As Figure 7 shown, the total length of the PBCH information is 0 to A + 7, where A = 24, 0 to A represents the length of the MIB information, A - 1 of which is the reserved bit position of the MIB field, and A + 6 and A + 7 are the reserved bit positions for the PBCH to carry bit information. By setting one or two of A - 1, A + 6, and A + 7, it can be made to indicate whether the cell used by the network side device to transmit the MBS service is a dedicated cell.

[0291] For example: When setting one or two of the reserved bit positions to indicate whether the cell used by the network side device to transmit the MBS service is a dedicated cell, it can be clearly pointed out that when and / or when it indicates that the cell where the terminal is located is a dedicated cell, that is, the cell used by the network side device to transmit the MBS service is a dedicated cell.

[0292] Optionally, the first indication information includes:

[0293] The detection timing parameter of the target PDCCH, and the detection timing parameter is used to determine the positional relationship between the SSB and the target PDCCH;

[0294] Or,

[0295] The information of the bits carried by the PBCH in the SSB.

[0296] In this embodiment, after the terminal obtains the detection timing parameters of the target PDCCH, it can determine the positional relationship between the SSB and the target PDCCH according to the detection timing parameters of the target PDCCH, and determine the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH. Alternatively, the network device indicates the detection method of the target PDCCH through the bits carried by the PBCH in the SSB (such as the reserved bits of the MIB field, or the reserved bits carrying bit information in the PBCH).

[0297] When the terminal determines the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH, for example: if the first detection time slot of the target PDCCH and the SSB are in the same time slot, it is determined that the detection method in the first detection time slot is the NCP-based detection method; if the first detection time slot of the target PDCCH and the SSB are in different time slots, it is determined that the detection method in the first detection time slot is the ECP-based detection method.

[0298] Optionally, when the cell used by the network device to send MBS services is a dedicated cell, the network device can configure only 1 NCP time slot to transmit the target PDCCH (such as time slot n0), and the NCP time slot and the SSB are in the same time slot (such as the offset O is 0 or 5). In this way, by reducing the detection opportunities of the target PDCCH (that is, reducing from the original 2 time slots to 1 time slot), the purpose of increasing the configured ECP time slot is achieved, the time slot utilization rate of the dedicated cell is improved, and the transmission efficiency of the broadcast multicast service is enhanced.

[0299] In the embodiments of the present application, the network device can configure the detection method of the terminal for the target PDCCH for the transmission method of the target PDCCH, realizing the flexibility of the detection scheduling of the target PDCCH and the maximization of the ECP subframe utilization rate, thereby enhancing the transmission efficiency of the broadcast multicast service.

[0300] It should be noted that all the embodiments related to the network device in the above embodiments applied to the terminal are applicable to the embodiments applied to the network device, and can also achieve the same technical effects, which will not be elaborated here.

[0301] It should be noted that the method for detecting the control channel in the embodiments of the present application can be applicable to the protocol standards supporting dedicated cells and subsequent evolved terminals.

[0302] The above embodiments introduce the method for detecting a control channel of the present invention. Next, this embodiment will further describe the corresponding device with reference to the accompanying drawings.

[0303] Specifically, as Figure 11 shown, an embodiment of the present invention provides a device 1100 for detecting a control channel, including:

[0304] A first receiving unit 1110, configured to receive a synchronization signal block SSB sent by a network-side device;

[0305] A first determining unit 1120, configured to determine a detection method for a target physical downlink control channel PDCCH according to the SSB;

[0306] A detection unit 1130, configured to detect the target PDCCH according to the detection method;

[0307] Among them, the detection method includes: a detection method based on an extended cyclic prefix ECP, or a detection method based on a normal cyclic prefix NCP.

[0308] Optionally, the device further includes:

[0309] A second determining unit, configured to determine, according to the SSB, that the cell indicating the transmission of MBS services by the network-side device is a dedicated cell;

[0310] Among them, the dedicated cell is a cell that transmits MBS services using a single-frequency network SFN.

[0311] Optionally, the first determining unit is specifically configured to: if the cell indicating the transmission of MBS services by the network-side device is a dedicated cell, determine a detection method for the target PDCCH according to the SSB.

[0312] Optionally, the second determining unit includes:

[0313] A first determining subunit, configured to determine, according to the indication status of a target field of a physical broadcast channel PBCH in the SSB, that the cell indicating the transmission of MBS services by the network-side device is a dedicated cell;

[0314] Or,

[0315] A second determining subunit, configured to determine, according to the bits carried by the PBCH in the SSB, that the cell indicating the transmission of MBS services by the network-side device is a dedicated cell.

[0316] Optionally, the first determining subunit is specifically configured to:

[0317] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the first state of the system information block SIB configuration information field in the PBCH;

[0318] Or,

[0319] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the second state of the sub - carrier offset field in the PBCH, where the sub - carrier offset is the sub - carrier offset between the physical resource block PRB of the synchronization signal block SSB and the PRB of the control resource set.

[0320] Optionally, the second determination subunit is specifically configured to:

[0321] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the first bit of the master information block MIB field in the PBCH;

[0322] Or,

[0323] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the second bit carrying bit information in the PBCH.

[0324] Optionally, the first determination unit includes:

[0325] A third determination subunit, configured to determine the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH;

[0326] Or,

[0327] A fourth determination subunit, configured to determine the detection method of the target PDCCH according to the bit carried by the PBCH in the SSB.

[0328] Optionally, the third determination subunit is specifically configured to:

[0329] If the first detection time slot of the target PDCCH is in the same time slot as the SSB, determine that the detection method in the first detection time slot is the NCP - based detection method;

[0330] If the first detection time slot of the target PDCCH is in a different time slot from the SSB, determine that the detection method in the first detection time slot is the ECP - based detection method.

[0331] Optionally, the positional relationship between the SSB and the target PDCCH is determined by the following method:

[0332] Determine the positional relationship between the SSB and the target PDCCH according to the detection timing parameter of the target PDCCH.

[0333] In an embodiment of the present application, the terminal determines a method for detecting a target PDCCH based on the SSB sent by the network device, including a detection method based on ECP or a detection method based on NCP. By flexibly configuring the detection method of the target PDCCH, the flexibility of the detection scheduling of the target PDCCH and the utilization rate of the ECP subframe are realized, thereby improving the transmission efficiency of the broadcast multicast service.

[0334] It should be noted here that the above device provided in the embodiment of the present invention can implement all the method steps implemented in the above method embodiment applied to the terminal, and can achieve the same technical effect. The same parts and beneficial effects as those in the method embodiment will not be specifically described in this embodiment.

[0335] Specifically, as Figure 12 shown, an embodiment of the present invention provides a device 1200 for detecting a control channel, including:

[0336] A first sending unit 1210, configured to send an SSB to the terminal, where the SSB includes: first indication information for indicating a detection method of a target PDCCH;

[0337] Wherein, the detection method includes: a detection method based on ECP, or a detection method based on NCP.

[0338] Optionally, the SSB further includes: second indication information for indicating whether the cell used by the network device to send MBS services is a dedicated cell;

[0339] Wherein, the dedicated cell is a cell that uses a single frequency network SFN to transmit MBS services.

[0340] Optionally, the detection method is: when the network device uses the dedicated cell to send MBS services, the detection method of the target PDCCH by the terminal.

[0341] Optionally, the second indication information includes:

[0342] Information on the indication status of the target field of the PBCH in the SSB;

[0343] Or,

[0344] Information on the bit positions carried by the PBCH in the SSB.

[0345] Optionally, the target field includes:

[0346] The SIB configuration information field in the PBCH;

[0347] Or,

[0348] The subcarrier offset field in the PBCH, where the subcarrier offset is the subcarrier offset between the PRB of the SSB and the PRB of the control resource set.

[0349] Optionally, the bit positions include:

[0350] The first bit position of the MIB field in the PBCH;

[0351] Or,

[0352] The second bit position carrying bit information in the PBCH.

[0353] Optionally, the first indication information includes:

[0354] The detection timing parameter of the target PDCCH, where the detection timing parameter is used to determine the positional relationship between the SSB and the target PDCCH;

[0355] Or,

[0356] The information of the bit positions carried by the PBCH in the SSB.

[0357] In the embodiments of the present application, the network-side device can configure the detection method of the terminal for the target PDCCH for the transmission mode of the target PDCCH, realizing the flexibility of the detection scheduling of the target PDCCH and the maximization of the ECP subframe utilization rate, thereby improving the transmission efficiency of the broadcast multicast service.

[0358] It should be noted here that the above device provided by the embodiments of the present invention can implement all the method steps implemented by the above method embodiments applied to the network-side device, and can achieve the same technical effects. Here, the same parts and beneficial effects as those in the method embodiments will not be specifically described again.

[0359] It should be noted that the division of units in the embodiments of the present application is illustrative, only a logical function division. In actual implementation, there may be other division methods. In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0360] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0361] As Figure 13 shown, an embodiment of the present invention further provides a terminal, including: a memory 1320, a transceiver 1300, and a processor 1310;

[0362] The memory 1320 is used to store a computer program; the processor 1310 is used to read the computer program in the memory; the transceiver 1300 is used to transmit and receive data under the control of the processor and perform the following operations:

[0363] Receive a synchronization signal block SSB sent by a network-side device;

[0364] The processor 1310 is used to read the computer program in the memory and perform the following operations:

[0365] Determine a detection method for a target physical downlink control channel PDCCH according to the SSB; detect the target PDCCH according to the detection method;

[0366] Among them, the detection method includes: a detection method based on an extended cyclic prefix ECP, or a detection method based on a normal cyclic prefix NCP.

[0367] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0368] Determine that the cell for transmitting MBS services indicated by the network-side device according to the SSB is a dedicated cell;

[0369] Among them, the dedicated cell is a cell that uses a single-frequency network SFN to transmit MBS services.

[0370] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0371] If the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell, determine the detection method of the target PDCCH according to the SSB.

[0372] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0373] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the indication status of the target field of the physical broadcast channel PBCH in the SSB;

[0374] Or,

[0375] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the bit positions carried by the PBCH in the SSB.

[0376] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0377] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the first status of the system information block SIB configuration information field in the PBCH;

[0378] Or,

[0379] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the second status of the sub - carrier offset field in the PBCH, where the sub - carrier offset is the sub - carrier offset between the physical resource block PRB of the synchronization signal block SSB and the PRB of the control resource set.

[0380] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0381] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the first bit position of the master information block MIB field in the PBCH;

[0382] Or,

[0383] Determine that the cell for transmitting the MBS service indicated by the network - side device is a dedicated cell according to the second bit position carrying bit information in the PBCH.

[0384] Optionally, the processor is used to read the computer program in the memory and perform the following operations:

[0385] Determine the detection method of the target PDCCH according to the positional relationship between the SSB and the target PDCCH;

[0386] Alternatively,

[0387] Determine the detection method of the target PDCCH according to the bit carried by the PBCH in the SSB.

[0388] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0389] If the first detection time slot of the target PDCCH is in the same time slot as the SSB, determine that the detection method in the first detection time slot is the NCP-based detection method;

[0390] If the first detection time slot of the target PDCCH is in a different time slot from the SSB, determine that the detection method in the first detection time slot is the ECP-based detection method.

[0391] Optionally, the positional relationship between the SSB and the target PDCCH is determined by the following method:

[0392] Determine the positional relationship between the SSB and the target PDCCH according to the detection occasion parameter of the target PDCCH.

[0393] In the embodiments of the present application, the terminal determines the method for detecting the target PDCCH according to the SSB sent by the network-side device, including the ECP-based detection method or the NCP-based detection method. By flexibly configuring the detection method of the target PDCCH, the flexibility of the detection scheduling of the target PDCCH and the utilization rate of the ECP subframe are improved, thereby enhancing the transmission efficiency of the broadcast multicast service.

[0394] It should be noted that in Figure 13 The bus architecture may include any number of interconnected buses and bridges. Specifically, various circuits of one or more processors represented by the processor 1310 and the memory represented by the memory 1320 are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art. Therefore, they will not be further described herein. The bus interface provides an interface. The transceiver 1300 may be multiple elements, that is, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on the transmission medium. For different terminals, the user interface 1330 may also be an interface capable of externally or internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, etc. The processor 1310 is responsible for managing the bus architecture and general processing, and the memory 1320 may store the data used by the processor 1310 when performing operations.

[0395] Optionally, the processor 1310 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device). The processor may also adopt a multi-core architecture.

[0396] The processor is used to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions by invoking the computer program stored in the memory. The processor and the memory may also be physically separated.

[0397] It should be noted here that the above terminal provided in the embodiments of the present invention can implement all the method steps implemented in the method embodiments applied to the terminal, and can achieve the same technical effects. The same parts and beneficial effects as those in the method embodiments will not be specifically described in this embodiment.

[0398] As Figure 14 shown, the embodiments of the present invention also provide a network-side device, including: a memory 1420, a transceiver 1400, and a processor 1410;

[0399] The memory 1420 is used to store a computer program; the processor 1410 is used to read the computer program in the memory; the transceiver 1400 is used to transmit and receive data under the control of the processor and perform the following operations:

[0400] Send an SSB to the terminal, where the SSB includes: first indication information for indicating a detection method of a target PDCCH;

[0401] Wherein, the detection method includes: a detection method based on ECP, or a detection method based on NCP.

[0402] Optionally, the SSB further includes: second indication information for indicating whether the cell used by the network-side device to send MBS services is a dedicated cell;

[0403] Wherein, the dedicated cell is a cell that uses a single-frequency network (SFN) to transmit MBS services.

[0404] Optionally, the detection method is: when the network-side device uses the dedicated cell to send MBS services, the detection method of the target PDCCH by the terminal.

[0405] Optionally, the second indication information includes:

[0406] Information on the indication status of the target field of the PBCH in the SSB;

[0407] Or,

[0408] Information on the bits carried by the PBCH in the SSB.

[0409] Optionally, the target field includes:

[0410] The SIB configuration information field in the PBCH;

[0411] Or,

[0412] The subcarrier offset field in the PBCH, where the subcarrier offset is the subcarrier offset between the PRB of the SSB and the PRB of the control resource set.

[0413] Optionally, the bits include:

[0414] The first bit of the MIB field in the PBCH;

[0415] Or,

[0416] The second bit carrying bit information in the PBCH.

[0417] Optionally, the first indication information includes:

[0418] The detection timing parameter of the target PDCCH, where the detection timing parameter is used to determine the positional relationship between the SSB and the target PDCCH;

[0419] Or,

[0420] Information on the bits carried by the PBCH in the SSB.

[0421] In the embodiments of the present application, the network-side device can configure the detection method of the terminal for the target PDCCH for the transmission method of the target PDCCH, realizing the flexibility of the detection scheduling of the target PDCCH and the maximization of the ECP subframe utilization rate, thereby improving the transmission efficiency of the broadcast multicast service.

[0422] Among them, in Figure 14Among them, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1410 and memory represented by memory 1420. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and thus will not be further described herein. The bus interface provides an interface. The transceiver 1400 may be multiple components, that is, including a transmitter and a transceiver, providing a unit for communicating with various other devices on the transmission medium. The processor 1410 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1410 when performing operations.

[0423] The processor 1410 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0424] It should be noted here that the above network-side device provided by the embodiments of the present invention can implement all the method steps implemented by the above method embodiments applied to the network-side device, and can achieve the same technical effects. The same parts and beneficial effects as those in the method embodiments will not be specifically described in this embodiment.

[0425] In addition, a specific embodiment of the present invention further provides a processor-readable storage medium, on which a computer program is stored. When the program is executed by the processor, it implements the steps of the method for detecting a control channel as described above. And it can achieve the same technical effects. To avoid repetition, it will not be elaborated here. Among them, the readable storage medium may be any available medium or data storage device accessible by the processor, including but not limited to magnetic memories (such as floppy disks, hard disks, magnetic tapes, magneto-optical discs (MO), etc.), optical memories (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid state drives (SSD), etc.).

[0426] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories and optical memories, etc.) that contain computer-usable program code.

[0427] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0428] These processor-executable instructions can also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the processor-readable memory generate a manufactured article including an instruction device that implements the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0429] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0430] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A method for detecting a control channel, characterized in that, Including: The terminal receives a Synchronization Signal Block (SSB) sent by a network-side device; The terminal determines a detection mode for a target Physical Downlink Control Channel (PDCCH) based on the SSB; The terminal detects the target PDCCH according to the detection mode; Wherein, the detection mode includes: a detection mode based on an Extended Cyclic Prefix (ECP), or a detection mode based on a Normal Cyclic Prefix (NCP); Determining a detection mode for a target Physical Downlink Control Channel (PDCCH) based on the SSB includes: If a first detection time slot of the target PDCCH is in the same time slot as the SSB, determining that the detection mode in the first detection time slot is a detection mode based on NCP; If a first detection time slot of the target PDCCH is in a different time slot from the SSB, determining that the detection mode in the first detection time slot is a detection mode based on ECP.

2. The method according to claim 1, wherein Before determining a detection mode for a target Physical Downlink Control Channel (PDCCH) based on the SSB, the method further includes: The terminal determines, based on the SSB, that a cell indicated by the network-side device for transmitting Multimedia Broadcast Multicast Service (MBS) is a dedicated cell; Wherein, the dedicated cell is a cell that uses a Single Frequency Network (SFN) to transmit MBS services.

3. The method according to claim 2, wherein Specifically, determining a detection mode for a target Physical Downlink Control Channel (PDCCH) based on the SSB includes: If the cell indicated by the network-side device for transmitting MBS services is a dedicated cell, determining a detection mode for the target PDCCH based on the SSB.

4. The method according to claim 2, wherein Determining, based on the SSB, that a cell indicated by the network-side device for transmitting Multimedia Broadcast Multicast Service (MBS) is a dedicated cell includes: Determining, based on an indication status of a target field of a Physical Broadcast Channel (PBCH) in the SSB, that a cell indicated by the network-side device for transmitting MBS services is a dedicated cell; Or, Determining, based on bits carried by the PBCH in the SSB, that a cell indicated by the network-side device for transmitting MBS services is a dedicated cell.

5. The method according to claim 4, wherein Determining, based on an indication status of a target field of a PBCH in the SSB, that a cell indicated by the network-side device for transmitting MBS services is a dedicated cell includes: Determining, based on a first status of a System Information Block (SIB) configuration information field in the PBCH, that a cell indicated by the network-side device for transmitting MBS services is a dedicated cell; Or, Determining, based on a second status of a subcarrier offset field in the PBCH, that a cell indicated by the network-side device for transmitting MBS services is a dedicated cell, where the subcarrier offset is the subcarrier offset between a Physical Resource Block (PRB) of the Synchronization Signal Block (SSB) and a PRB of a control resource set.

6. The method according to claim 4, characterized in that, Determining, based on bits carried by the PBCH in the SSB, that a cell indicated by the network-side device for transmitting MBS services is a dedicated cell includes: Determining, based on a first bit of a Master Information Block (MIB) field in the PBCH, that a cell indicated by the network-side device for transmitting MBS services is a dedicated cell; Or, Determine that the cell for transmitting the MBS service indicated by the network-side device is a dedicated cell according to the second bit position carrying bit information in the PBCH.

7. The method according to claim 1, wherein The positional relationship between the SSB and the target PDCCH is determined in the following manner: Determine the positional relationship between the SSB and the target PDCCH according to the detection occasion parameter of the target PDCCH.

8. A method for detecting a control channel, characterized in that, including: The network-side device sends an SSB to the terminal, and the SSB includes: first indication information for indicating a detection manner of a target PDCCH; wherein, the detection manner includes: a detection manner based on ECP, or a detection manner based on NCP; wherein, the first indication information is used for the terminal to determine the positional relationship between the SSB and the target PDCCH. If the first detection time slot of the target PDCCH and the SSB are in the same time slot, determine that the detection manner in the first detection time slot is a detection manner based on NCP; if the first detection time slot of the target PDCCH and the SSB are in different time slots, determine that the detection manner in the first detection time slot is a detection manner based on ECP.

9. The method according to claim 8, wherein The SSB further includes: second indication information for indicating whether the cell used by the network-side device to transmit the MBS service is a dedicated cell; wherein, the dedicated cell is a cell that transmits the MBS service using a single-frequency network SFN.

10. The method according to claim 9, wherein The detection manner is: the detection manner of the terminal for the target PDCCH when the network-side device uses the dedicated cell to transmit the MBS service.

11. The method according to claim 9, wherein The second indication information includes: information on the indication status of the target field of the PBCH in the SSB; or, information on the bit positions carried by the PBCH in the SSB.

12. The method according to claim 11, wherein The target field includes: the SIB configuration information field in the PBCH; or, the subcarrier offset field in the PBCH, where the subcarrier offset is the subcarrier offset between the PRB of the SSB and the PRB of the control resource set.

13. The method according to claim 11, wherein The bit positions include: the first bit position of the MIB field in the PBCH; or, the second bit position carrying bit information in the PBCH.

14. The method according to claim 8, wherein The first indication information includes: the detection occasion parameter of the target PDCCH, and the detection occasion parameter is used to determine the positional relationship between the SSB and the target PDCCH.

15. A terminal, characterized in that, including: a memory, a transceiver, a processor: The memory is used to store a computer program; The processor is used to read the computer program in the memory; The transceiver is used to transmit and receive data under the control of the processor and perform the following operations: Receive a synchronization signal block SSB sent by the network-side device; The processor is used to read the computer program in the memory and perform the following operations: Determine the detection manner of a target physical downlink control channel PDCCH according to the SSB; Detect the target PDCCH according to the detection manner; wherein, the detection manner includes: a detection manner based on an extended cyclic prefix ECP, or a detection manner based on a normal cyclic prefix NCP; The processor is configured to read the computer program in the memory and perform the following operations: If the first detection time slot of the target PDCCH and the SSB are in the same time slot, determine that the detection method on the first detection time slot is the NCP-based detection method; If the first detection time slot of the target PDCCH and the SSB are in different time slots, determine that the detection method on the first detection time slot is the ECP-based detection method.

16. A network-side device, characterized in that, Comprising: A memory, a transceiver, a processor: The memory is used for storing a computer program; The processor is used for reading the computer program in the memory; The transceiver is used for transmitting and receiving data under the control of the processor and performing the following operations: Sending an SSB to a terminal, where the SSB includes: first indication information for indicating a detection method of a target PDCCH; Wherein, the detection method includes: an ECP-based detection method or an NCP-based detection method; Wherein, the first indication information is used for the terminal to determine the positional relationship between the SSB and the target PDCCH. If the first detection time slot of the target PDCCH and the SSB are in the same time slot, determine that the detection method on the first detection time slot is the NCP-based detection method; if the first detection time slot of the target PDCCH and the SSB are in different time slots, determine that the detection method on the first detection time slot is the ECP-based detection method.

17. A device for detecting a control channel, characterized in that, Comprising: A first receiving unit, configured to receive a synchronization signal block SSB sent by a network-side device; A first determining unit, configured to determine a detection method of a target physical downlink control channel PDCCH according to the SSB; A detection unit, configured to detect the target PDCCH according to the detection method; Wherein, the detection method includes: an ECP-based detection method or an NCP-based detection method; The first determining unit is specifically configured to: If the first detection time slot of the target PDCCH and the SSB are in the same time slot, determine that the detection method on the first detection time slot is the NCP-based detection method; If the first detection time slot of the target PDCCH and the SSB are in different time slots, determine that the detection method on the first detection time slot is the ECP-based detection method.

18. A device for detecting a control channel, characterized in that, Comprising: A first sending unit, configured to send an SSB to a terminal, where the SSB includes: first indication information for indicating a detection method of a target PDCCH; Wherein, the detection method includes: an ECP-based detection method or an NCP-based detection method; Wherein, the first indication information is used for the terminal to determine the positional relationship between the SSB and the target PDCCH. If the first detection time slot of the target PDCCH and the SSB are in the same time slot, determine that the detection method on the first detection time slot is the NCP-based detection method; if the first detection time slot of the target PDCCH and the SSB are in different time slots, determine that the detection method on the first detection time slot is the ECP-based detection method.

19. A processor-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method for detecting a control channel as described in any one of claims 1 to 7, or implements the steps of the method for detecting a control channel as described in any one of claims 8 to 14.

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