Method and apparatus for indicating control information

Abstract

A method and apparatus for indicating control information are disclosed. The method for indicating control information comprises: receiving first information sent by a network device, the first information being used to indicate a number of symbols occupied by a control information resource set CORESET 0 in a time domain and a first offset in a frequency domain (101); determining a time-frequency resource location of the CORESET 0 according to the first information and a predetermined subcarrier spacing (102); and receiving downlink control information at the time-frequency resource location of the CORESET 0 (103); wherein the first offset is any one of X1, X2, X3 or X4, X1, X2, X3 and X4 are integers and are not equal. The method can improve the resource use efficiency of PBCH.

Description

Technical Field

[0001] This application relates to communication technology, and more particularly to a method and apparatus for indicating control information. Background Technology

[0002] The New Radio (NR) standard defines a synchronization burst set (SS burst set), primarily used by User Equipment (UE) for initial access, system message updates, or beam management. Each SS burst set lasts for 5 ms, with a period of 5, 10, 20, 40, 80, or 100 ms. An SS burst set consists of several synchronization signal blocks (SSBs). When the carrier frequency is less than 6 GHz, each SS burst set contains a maximum of 8 SSBs; when the carrier frequency is greater than 6 GHz, each SS burst set contains a maximum of 64 SSBs.

[0003] like Figure 1 As shown, each SSB lasts for 4 symbols, corresponding sequentially to the primary synchronization signal (PSS), physical broadcast channel (PBCH), secondary synchronization signal (SSS), and PBCH. Each SSB can correspond to a different beam direction to ensure cell coverage.

[0004] However, the configuration information of the physical downlink control channel transmitted via PBCH consumes a large amount of resources. Summary of the Invention

[0005] This application provides a method and apparatus for indicating control information to reduce the resource overhead of information in the PBCH used to indicate the time-domain resource location of CORESET 0.

[0006] In a first aspect, embodiments of this application provide a method for indicating control information. The method may include: receiving first information sent by a network device, the first information indicating the number of symbols occupied by a control information resource set CORESET 0 in the time domain and a first offset in the frequency domain; determining the time-frequency resource location of CORESET 0 based on the first information and a predetermined subcarrier spacing; and receiving downlink control information at the time-frequency resource location of CORESET 0. The first offset is any one of X1, X2, X3, or X4, where X1, X2, X3, and X4 are integers and are not equal.

[0007] In the scheme of this application, the first information sent by the network device has fewer bits compared to the information used in the prior art to indicate the time-domain resource location of CORESET 0, which can improve the resource utilization efficiency of PBCH. In addition, the first offset is any one of X1, X2, X3, or X4, so that the first offset can be indicated using four bits, thereby saving resource overhead.

[0008] In one possible design, when a time slot supports the transmission of one or more synchronization signal blocks SSB and CORESET 0, this first information is also used to indicate the number of CORESET 0s in each time slot.

[0009] In one possible design, the first offset is used to indicate the sequence number of the first resource block RB corresponding to CORESET 0, which is located in the portion of the bandwidth where the synchronization signal block corresponding to the first information is located.

[0010] In one possible design, when the predetermined subcarrier spacing is 15 kHz or 30 kHz, the first information is four bits.

[0011] In one possible design, the method may further include receiving second information sent by a network device, the second information indicating a second offset of CORESET 0 in the frequency domain, the second offset indicating the subcarrier number in the first RB corresponding to CORESET 0, wherein the second offset is any one of 0 to 11, and the time-frequency resource location of CORESET 0 is determined according to the first information and the second information.

[0012] In the scheme of this application, for the NR-U system, the value range of the second offset is 0-11, and only 4 bits are needed to indicate it in the main information block, which can save 1 bit of indication overhead compared to NR.

[0013] In one possible design, the bandwidth of the synchronization signal block corresponding to the first information is aligned with the frequency band of the wireless local area network, and the synchronization signal block is transmitted at a preset position in that bandwidth.

[0014] In one possible design, the method may further include receiving second information sent by a network device, the second information indicating at least one reference signal that is quasi-co-located with the synchronization signal block.

[0015] Secondly, embodiments of this application provide a method for indicating control information. This method may include: sending first information to a terminal device, the first information indicating the number of symbols occupied by control information resource set CORESET 0 in the time domain and a first offset in the frequency domain; and sending downlink control information at the time-frequency resource location of CORESET 0. The first offset is any one of X1, X2, X3, or X4, where X1, X2, X3, and X4 are integers and are not equal.

[0016] In one possible implementation, the method may further include sending second information to a terminal device, the second information indicating a second offset of CORESET 0 in the frequency domain, the second offset indicating the sequence number of the subcarrier interval in the first RB corresponding to CORESET 0, wherein the second offset is any one of 0 to 11.

[0017] In one possible design, the bandwidth of the synchronization signal block corresponding to the first information is aligned with the frequency band allocation of the wireless local area network, and the synchronization signal block is transmitted at a preset position in that bandwidth.

[0018] In one possible design, the method may further include: sending second information to a terminal device, the second information indicating at least one reference signal having a quasi-co-address relationship with the synchronization signal block.

[0019] Thirdly, embodiments of this application provide a communication device for executing the method for indicating control information in the first aspect or any possible design of the first aspect. Specifically, the communication device may include modules for executing the method for indicating control information in the first aspect or any possible design of the first aspect. For example, it may include a transceiver module and a processing module. The communication device may be a terminal device.

[0020] Fourthly, embodiments of this application provide a terminal device, which includes a memory and a processor. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory. Execution of the instructions stored in the memory causes the processor to perform the method in the first aspect or any possible design of the first aspect.

[0021] Fifthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method in the first aspect or any possible design of the first aspect.

[0022] Sixthly, embodiments of this application provide a communication device for executing the communication method in the second aspect or any possible design of the second aspect. Specifically, the communication device may include modules for executing the method for instructing control information in the second aspect or any possible design of the second aspect. For example, it may include a transceiver module and a processing module. The communication device may be a network device.

[0023] In a seventh aspect, embodiments of this application provide a network device including a memory and a processor. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory. Execution of the instructions stored in the memory causes the processor to perform the methods in the second aspect or any possible design of the second aspect.

[0024] The eighth aspect provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the methods of the second aspect or any possible design of the second aspect.

[0025] The method and apparatus for indicating control information disclosed in this application transmit a main information block to a terminal device via a network device. This main information block may include first information indicating the number of symbols occupied by CORESET 0 in the time domain and a first offset in the frequency domain. The terminal device determines the time-frequency resource location of CORESET 0 based on the first information and a predetermined subcarrier spacing. The network device then transmits downlink control information at the time-frequency resource location of CORESET 0. Compared to prior art information indicating the time-domain resource location of CORESET 0, the first information in this application has fewer bits, which can improve the resource utilization efficiency of the PBCH. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an SS burst set;

[0027] Figure 2 This is a schematic diagram illustrating another application scenario of an embodiment of this application;

[0028] Figure 3 This is a flowchart illustrating a method for indicating control information according to an embodiment of this application;

[0029] Figure 4AThis is a schematic diagram of an SSB and its corresponding CORESET 0 according to an embodiment of this application;

[0030] Figure 4B This is a schematic diagram of another SSB and the corresponding CORESET 0 according to an embodiment of this application;

[0031] Figure 4C This is a schematic diagram of another SSB and the corresponding CORESET 0 according to an embodiment of this application;

[0032] Figure 4D This is a schematic diagram of another SSB and the corresponding CORESET 0 according to an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of a communication device 5000 according to an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of another communication device 5100 according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of a communication device 5200 according to an embodiment of this application;

[0036] Figure 8 This is a schematic block diagram of another communication device 5300 according to an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the SSB and SSB candidate positions transmitted according to an embodiment of this application. Detailed Implementation

[0038] The terms "first," "second," etc., used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as including a series of steps or units. A method, system, product, or apparatus is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0039] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0040] The network equipment involved in this application refers to equipment capable of communicating with terminal equipment. Network equipment can be access network equipment, relay stations, or access points. For example, network equipment can be a base transceiver station (BTS) in a Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA) network, a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) network, or an evolved base station (eNB, eNodeB) in a Long Term Evolution (LTE) network. Network equipment can also be a radio controller in a cloud radio access network (CRAN) scenario. Network equipment can also be network equipment in a 5G network or in a future evolved Public Land Mobile Network (PLMN). Network equipment can also be wearable devices or vehicle-mounted devices, etc.

[0041] The terminal equipment involved in this application refers to a communication device with communication functions. For example, it can be a wireless communication device, an Internet of Things (IoT) device, a wearable device or in-vehicle device, a mobile terminal, a Customer Premise Equipment (CPE), etc. This mobile terminal can also be referred to as User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, user terminal, terminal, wireless communication device, user agent, or user device. This mobile terminal can be a smartphone, cellular phone, cordless phone, tablet computer, Personal Digital Assistant (PDA) device, IoT device with wireless communication functions, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, device in a vehicle-to-everything (V2X) scenario, terminal device in a 5G network, or terminal device in a future PLMN network, etc.

[0042] For example, one application scenario of this application embodiment may include a terminal device and a network device. The terminal device may be any of the aforementioned types, and correspondingly, the network device may be any of the aforementioned types. The terminal device can receive first information sent by the network device using the method for indicating control information according to this application. This first information indicates the number of symbols occupied by ControlResourceSet 0 (CORESET 0) in the time domain and a first offset in the frequency domain. Based on this first information and a predetermined subcarrier spacing, the location of the time-domain resources of CORESET 0 is determined. Downlink control information (DCI) sent by the network device is received at the time-domain resource location of CORESET 0, thereby obtaining resource configuration information for subsequent random access or performing RMSI updates. Compared to the information used in the prior art to indicate the time-domain resource location of CORESET 0, the first information of this application has fewer bits, which can improve the resource utilization efficiency of PBCH. For a detailed explanation, please refer to the explanation of the following embodiments.

[0043] The Control Resource Set 0 (CORESET 0) involved in this application can also be referred to as the Remaining System Information Control Resource Set (RMSICORESET). They have the same meaning: they are used to carry the Type-0 Physical Downlink Control Channel (type-0PDCCH).

[0044] For example, Figure 2 This is a schematic diagram illustrating another application scenario of an embodiment of this application, such as... Figure 2 As shown, this application scenario uses one base station (BS) and six user units (UEs) as an example. The six UEs are UE1, UE2, UE3, UE4, UE5, and UE6. For example, the base station can send the first information to UE1 through UE6. UE1 through UE6 can then perform random access or RMSI updates based on the first information. The base station can also receive uplink data sent by UE1 through UE6. Furthermore, UE4 through UE6 can also form a communication system. In this communication system, the BS can send downlink information to UE1, UE2, UE3, and UE5, and UE5 can also send downlink information to UE4 and UE6.

[0045] It should be noted that this embodiment uses a single BS and a single cell as an example for illustration, and this embodiment of the application is not intended to be limiting.

[0046] Figure 3 This is a flowchart illustrating a method for indicating control information according to an embodiment of this application. The method in this embodiment relates to a terminal device and a network device, such as... Figure 3 As shown, the method in this embodiment may include:

[0047] Step 101: The network device sends the first information to the terminal device.

[0048] The terminal device receives the first information sent by the network device. This first information may be carried in the master information block (MIB). This first information is used to indicate the number of symbols occupied by CORESET 0 in the time domain and the first offset in the frequency domain.

[0049] For example, during the initial access phase, the terminal device detects the synchronization signal block and obtains the PBCH within it. This PBCH can carry the MIB, and the terminal device obtains the first information by parsing the MIB. In other words, the MIB is carried within the PBCH. This first information can be used to indicate the number of symbols occupied by CORESET 0 in the time domain and its first offset in the frequency domain. The number of symbols occupied by CORESET 0 in the time domain can be, for example, 1 or 2. The first offset can be an offset at the resource block (RB) granularity. It can be the offset between the starting position of CORESET 0 in the frequency domain and the starting position of the synchronization signal block in the frequency domain, or the offset between the starting position of CORESET 0 in the frequency domain and the starting position of the bandwidth part (BWP) where the synchronization signal block is located in the frequency domain, or the offset between the ending position of CORESET 0 in the frequency domain and the ending position of the BWP where the synchronization signal block is located in the frequency domain. Specifically, the starting position of CORESET 0 in the frequency domain can be the position of the RB with the smallest RB index (or sequence number) among the RB resources occupied by CORESET 0 in the frequency domain. The starting position of the synchronization signal block in the frequency domain can be the position of the RB with the smallest RB index among the RB resources occupied by the synchronization signal block in the frequency domain. The ending position of CORESET 0 in the frequency domain can be the position of the RB with the largest RB index among the RB resources occupied by CORESET 0 in the frequency domain. The ending position of the BWP containing the synchronization signal block in the frequency domain can be the position of the RB with the largest RB index among the RB resources occupied by the BWP containing the synchronization signal block in the frequency domain.

[0050] For example, as described above Figure 2 The application scenario shown is illustrated by an example. The BS can send a synchronization signal block, and UE1, UE2 and UE3 respectively detect the synchronization signal block sent by the BS. The synchronization signal block carries the first information.

[0051] Step 102: The terminal device determines the location of CORESET 0 based on the first information and the predetermined subcarrier spacing. Specifically, the terminal device determines the time / frequency resource location of CORESET 0.

[0052] As an example, the predetermined subcarrier space (SCS) can be 15 kHz or 30 kHz.

[0053] In another example, the terminal device can determine the preset subcarrier spacing based on the subcarrier spacing of the detected synchronization signal block. For instance, if the terminal device detects a subcarrier spacing of 30kHz for the SSB, then the terminal device can determine that the preset subcarrier spacing is 30kHz. If the terminal device detects a subcarrier spacing of 15kHz for the SSB, then the terminal device can determine that the preset subcarrier spacing is 15kHz.

[0054] The terminal device can determine the number of symbols occupied by CORESET 0 in the time domain and the first offset in the frequency domain based on the first information and the predetermined subcarrier spacing. The first information may not indicate the number of redundancy blocks (RBs) of the frequency domain resources of CORESET 0. The terminal device can determine the number of RBs of the frequency domain resources of CORESET 0 based on the predetermined subcarrier spacing. In this embodiment, the SSB and the subcarrier spacing of CORESET 0 are the same. For example, when the predetermined subcarrier spacing is 30kHz, the number of RBs of the frequency domain resources of CORESET 0 is 48; when the predetermined subcarrier spacing is 15kHz, the number of RBs of the frequency domain resources of CORESET 0 is 96.

[0055] The method for indicating control information in this application can be applied to NR in Unlicensed Spectrum (NR-U). For NR-U, the multiplexing mode of its SSB and CORESET 0 is usually time-division multiplexing, so the first information may not indicate the multiplexing mode of SSB and CORESET 0.

[0056] For example, for NR-U, the starting position of the SSB in the time domain (e.g., the starting symbol in the time domain) is adjacent to or separated from the corresponding CORESET 0 by one symbol in the time domain. The starting symbol position of CORESET 0 within a slot is fixed, and the number of symbols occupied by CORESET 0 in the time domain is either 1 or 2. When the starting position of CORESET 0 is obtained, the terminal device can determine the time domain resource position of CORESET 0 based on the number of symbols occupied by CORESET 0 in the time domain. Taking a BWP of 20MHz where the SSB is located as an example, the terminal device can determine the frequency domain resource position of CORESET 0 based on the first offset of CORESET 0 in the frequency domain and the number of RBs in the frequency domain resource of CORESET 0. The terminal device can determine the time-frequency resource position of CORESET 0 based on the time domain resource position and the frequency domain resource position of CORESET 0.

[0057] The method provided in this application does not require information such as the subcarrier spacing of CORESET 0, the number of RBs of CORESET 0 in the frequency domain, and the multiplexing mode of SSB and CORESET 0. Therefore, compared with the information used to indicate the time domain resource location of CORESET 0 in the prior art, it has fewer bits, which can reduce the resource occupation of PBCH. The saved resources can be used to indicate other information, thereby improving the resource utilization efficiency of PBCH.

[0058] Step 103: The network device sends downlink control information at the time-frequency resource location of CORESET 0. In other words, the downlink control information is carried in CORESET 0.

[0059] The terminal device receives downlink control information at the time-frequency resource location of CORESET 0. The terminal device can use this downlink control information to obtain resource configuration information for subsequent random access, and then perform initial random access based on this configuration information. Alternatively, the terminal device can use this downlink control information to update the RMSI.

[0060] In this embodiment, a network device sends first information to a terminal device. This first information indicates the number of symbols occupied by CORESET0 in the time domain and a first offset in the frequency domain. The terminal device determines the time-frequency resource location of CORESET0 based on this first information and a predetermined subcarrier spacing. The network device sends downlink control information at the time-frequency resource location of CORESET0. The terminal device can obtain subsequent random access resource configuration information based on this downlink control information to perform initial random access or update the RMSI based on the downlink control information. Compared to the information used in the prior art to indicate the time-domain resource location of CORESET0, the first information in this application has fewer bits, which can improve the resource utilization efficiency of PBCH.

[0061] In some embodiments, when a time slot supports the transmission of one or more SSBs and CORESET 0s, the first information can also be used to indicate the number of CORESET 0s in each time slot, for example, the number of CORESET 0s in each time slot is 1 or 2.

[0062] For the SSB in NR-U, the time-domain resource location of its CORESET 0 can be as follows: Figures 4A to 4D In any of these cases, the SSB and its corresponding CORESET 0 are adjacent to or separated by one symbol, and the starting symbol position of CORESET 0 within the time slot is fixed. The number of consecutive symbols for CORESET 0 is either 1 or 2 symbols. For example, such as Figures 4A to 4CIn any of these cases, each SSB and its corresponding CORESET 0 occupy half a time slot, meaning there are two CORESET 0 instances within a single time slot. For example, Figure 4A As shown, the time slot is configured with two CORESET 0s, each corresponding to a different SSB. Each CORESET 0 occupies two symbols: the first CORESET 0 occupies symbols #0 and #1, and the second CORESET 0 occupies symbols #7 and #8. Figure 4B As shown, the time slot is configured with two CORESET 0s, each corresponding to a different SSB. Each CORESET 0 occupies two symbols: the first CORESET 0 occupies symbols #0 and #1, and the second CORESET 0 occupies symbols #6 and #7. Figure 4C As shown, the time slot is set with two CORESET 0s, each corresponding to a different SSB. The first CORESET 0 occupies symbols #0 and #1, while the second CORESET 0 occupies symbol #7. Figure 4D As shown, a CORESET 0 is set in a time slot, that is, there is 1 CORESET 0 in a time slot, and the symbol occupied by this CORESET 0 is symbol #1.

[0063] pass Figures 4A to 4D As can be seen, for NR-U, the starting position of SSB in the time domain is adjacent to or separated from the corresponding CORESET 0 by one symbol, and the starting symbol position of CORESET 0 is fixed within the time slot, and the number of continuous symbols is 1 or 2 symbols.

[0064] In some embodiments, the first offset is used to indicate the sequence number of the first resource block (RB) corresponding to CORESET 0. The first RB can be the RB with the smallest RB index (or sequence number) among the RB resources occupied by CORESET 0 in the frequency domain. The first RB is located in a portion of the bandwidth where the synchronization signal block corresponding to the first information (the main information block where the first information is located) is located. The first offset of the frequency domain resource can be any one of X1, X2, X3, or X4, where X1, X2, X3, and X4 are integers and are not equal. For example, X1 = 0, X2 = 1, X3 = 2, X = 4.

[0065] Since the initial access bandwidth of NR-U is 20MHz by default, the position of CORESET 0 in the frequency domain is relatively fixed. Taking a predetermined subcarrier spacing of 30kHz as an example, the initial access bandwidth (20MHz) occupies 51 RBs, and when the predetermined subcarrier spacing is 30kHz, the number of RBs in the frequency domain resources of CORESET 0 is 48. Taking the first offset as the offset value between the starting position of CORESET 0 in the frequency domain and the starting position of the BWP where the synchronization signal block is located in the frequency domain, the first offset can be 0, 1, 2, or 3. The terminal device can determine the frequency domain resource position of CORESET 0 based on the first offset. For example, if the 51 RBs occupied by the BWP where the synchronization signal block is located are numbered from 0 to 50, and assuming the first offset is 1, the terminal device can determine that the frequency domain resource position of CORESET 0 is RBs numbered from 1 to 48.

[0066] Taking the first offset as the offset between the starting position of CORESET 0 in the frequency domain and the starting position of the synchronization signal block in the frequency domain, the first offset can be -17, -18, -19, or -20. The terminal device can determine the frequency domain resource location of CORESET 0 based on this first offset. For example, if the 51 RBs occupied by the BWP where the synchronization signal block is located are numbered 0 to 50, and assuming the synchronization signal block is fixed to be transmitted on RBs numbered 20 to 49, and the first offset is -18, then the terminal device can determine that the frequency domain resource location of CORESET 0 is on RBs numbered 2 to 49.

[0067] In some embodiments, when the predetermined subcarrier interval is 30 kHz, the first information may be four bits.

[0068] One possible implementation is that the first information can correspond to an index, and different indices can correspond to different numbers of symbols occupied by CORESET 0 in the time domain and first offset in the frequency domain. For example, the correspondence between the index and parameters such as the number of symbols occupied by different CORESET 0 in the time domain and first offset in the frequency domain can be shown in Table 1 below.

[0069] Table 1 Preset Subcarrier Spacing = 30kHz CORESET 0 Configuration Parameter Table

[0070]

[0071]

[0072] As shown in Table 1, the first column is the index, the second column is the SSB and CORESET 0 multiplexing mode, the third column is the number of RBs of CORESET 0 in the frequency domain, the fourth column is the number of symbols of CORESET 0 in the time domain, the fifth column is the first offset of CORESET 0 in the frequency domain, and the sixth column is the number of CORESET 0 in each time slot. Each row is the configuration of the above parameters (SSB and CORESET 0 multiplexing mode, number of symbols of CORESET 0, etc.) corresponding to different indices.

[0073] For example, if the first information is 0001, then the index corresponding to the first information is 1. Thus, it can be determined that the multiplexing mode of SSB and CORESET 0 is mode 1, the number of RBs of CORESET 0 in the frequency domain is 48, the number of symbols of CORESET 0 in the time domain is 1, the first offset of CORESET 0 is X2, and the number of CORESET 0 in each time slot is 1. Thus, the time-frequency resource location of CORESET 0 is determined according to the configuration of each parameter.

[0074] It should be noted that Table 1 above is an exemplary illustration, and it may also be in other specific forms. For example, Table 1 may not include the second, third, or sixth column. Furthermore, the order of the rows in Table 1 may be other orders. This application embodiment is not limited to the specific form of Table 1.

[0075] Another possible implementation is that different bits of the first information correspond to different parameter configurations. For example, the first bit of the four bits of the first information is used to indicate the number of symbols occupied by CORESET 0 in the time domain, the second and third bits are used to indicate the first offset of CORESET 0 in the frequency domain, and the fourth bit is used to indicate the number of CORESET 0s in each time slot. For example, when the first bit is 0, it indicates that CORESET 0 occupies 1 symbol in the time domain; when the first bit is 1, it indicates that CORESET 0 occupies 2 symbols in the time domain; when the second and third bits are 00, it indicates that the first offset is X1; when the second and third bits are 01, it indicates that the first offset is X2; when the second and third bits are 10, it indicates that the first offset is X3; when the second and third bits are 11, it indicates that the first offset is X4; when the fourth bit is 0, it indicates that the number of CORESET 0s in each time slot is 1; when the fourth bit is 1, it indicates that the number of CORESET 0s in each time slot is 2. For instance, when the first information is 0001, it can be determined that CORESET 0 occupies 1 symbol in the time domain, the first offset is X1, and the number of CORESET 0s in each time slot is 1, thus determining the time-frequency resource location of CORESET 0 based on the above parameter configuration.

[0076] In this embodiment, a network device sends first information to a terminal device. This first information indicates the number of symbols occupied by CORESET0 in the time domain and a first offset in the frequency domain. This first information consists of four bits. The terminal device determines the time-frequency resource location of CORESET0 based on this first information and a predetermined subcarrier spacing. The network device then sends downlink control information at the time-frequency resource location of CORESET0. Compared to the information used in the prior art to indicate the time-domain resource location of CORESET0, the first information in this application has fewer bits, which can improve the resource utilization efficiency of PBCH.

[0077] In the prior art, the information used to indicate the time-domain resource location of CORESET 0 is typically eight bits. In the embodiments of this application, the first information can be four bits, thereby saving resource overhead.

[0078] In some embodiments, the first offset of the frequency domain resource is used to indicate the sequence number of the first RB corresponding to CORESET 0. The first RB is located in a portion of the bandwidth where the synchronization signal block corresponding to the first information (the main information block where the first information is located) is located. The first offset of the frequency domain resource is any one of Y1, Y2, Y3, Y4, Y5, or Y6, where Y1, Y2, Y3, Y4, Y5, and Y6 are integers and are not equal. For example, Y1=0, Y2=1, Y3=2, Y4=3, Y5=4, Y6=5.

[0079] Since the initial access bandwidth of NR-U is 20MHz by default, the position of CORESET 0 in the frequency domain is relatively fixed. Taking a predetermined subcarrier spacing of 15kHz as an example, the initial access bandwidth (20MHz) occupies 101 RBs, and when the predetermined subcarrier spacing is 15kHz, the number of RBs for CORESET 0 in the frequency domain is 96. Taking the first offset as the offset value between the starting position of CORESET 0 in the frequency domain and the starting position of the BWP where the synchronization signal block is located in the frequency domain, the first offset can be 0, 1, 2, 3, 4, or 5. The terminal device can determine the frequency domain resource position of CORESET 0 based on the first offset. For example, if the 101 RBs occupied by the BWP where the synchronization signal block is located are numbered from 0 to 100, and assuming the first offset is 1, the terminal device can determine that the frequency domain resource position of CORESET 0 is RBs numbered from 1 to 96.

[0080] In some embodiments, when the predetermined subcarrier interval is 15 kHz, the first information is five bits.

[0081] One possible implementation is that the first information can correspond to an index, and different indices can correspond to different numbers of symbols occupied by CORESET 0 in the time domain and first offset in the frequency domain. For example, the correspondence between the index and parameters such as the number of symbols occupied by different CORESET 0 in the time domain and first offset in the frequency domain can be shown in Table 2 below.

[0082] Table 2. Predetermined subcarrier spacing = 15kHz. CORESET 0 Configuration Parameter Table.

[0083]

[0084]

[0085] As shown in Table 2, the configurations of each column in Table 2 are the same as those in Table 1, and will not be repeated here. The difference between Table 2 and Table 1 is that the first offset can be one of six values, so there are 24 indexes in Table 2, each index corresponding to different configurations of various parameters (SSB and CORESET 0 multiplexing mode, number of symbols in CORESET 0, etc.).

[0086] For example, if the first information is 00001, then the index corresponding to the first information is 1. Thus, it can be determined that the multiplexing mode of SSB and CORESET 0 is mode 1, the number of RBs of CORESET 0 in the frequency domain is 96, the number of symbols of CORESET 0 in the time domain is 1, the first offset of the frequency domain resource of CORESET 0 is Y2, and the number of CORESET 0 in each time slot is 1. Thus, the time and frequency resource location of CORESET 0 is determined according to the configuration of each parameter.

[0087] It should be noted that Table 2 above is an exemplary illustration, and it may also be in other specific forms. For example, Table 2 may not include the second, third, or sixth column. Furthermore, the order of the rows in Table 2 may be other orders. This application embodiment is not limited to the specific form of Table 2.

[0088] When the predetermined subcarrier interval is 15kHz, the first information can also be four bits. For example, to reduce the resource overhead of the first information, the first offset can support any four of Y1, Y2, Y3, Y4, Y5, or Y6, thereby reducing the first information to four bits. When the first offset supports any four of Y1, Y2, Y3, Y4, Y5, or Y6, its parameter configuration table is similar to the table, except that the number of RBs in CORESET0 is 96, and the first offset is any four of Y1, Y2, Y3, Y4, Y5, or Y6. In some embodiments, the values ​​of any four of Y1, Y2, Y3, Y4, Y5, or Y6 can be equal to the values ​​of X1, X2, X3, and X4. For another example, when the number of CORESET 0s in each time slot is fixed at 2, the first information can also be four bits.

[0089] In this embodiment, a network device sends first information to a terminal device. This first information indicates the number of symbols occupied by CORESET0 in the time domain and a first offset in the frequency domain. This first information consists of four or five bits. The terminal device determines the time-frequency resource location of CORESET0 based on this first information and a predetermined subcarrier spacing. The network device then sends downlink control information at the time-frequency resource location of CORESET0. Compared to the information used in the prior art to indicate the time-domain resource location of CORESET0, the first information in this application has fewer bits, which can improve the resource utilization efficiency of the PBCH.

[0090] In the prior art, the information used to indicate the time-domain resource location of CORESET 0 is usually eight bits. The first information in the embodiments of this application can be four or five bits, thereby saving resource overhead.

[0091] In some embodiments, the terminal device of this application embodiment can also receive second information sent by the network device. In other words, the main information block can also include second information. The second information is used to indicate a second offset of CORESET 0 in the frequency domain, and the second offset is used to indicate the subcarrier sequence number in the first RB corresponding to CORESET 0. The subcarrier sequence number in the first RB can be the subcarrier sequence number in the RB with the smallest RB index (or sequence number) among the RB resources occupied by CORESET 0 in the frequency domain, or it can be referred to as the starting position of the subcarrier in the first RB. Wherein, the second offset is any one of 0 to 11, and the time-frequency resource position of CORESET 0 is determined according to the first information and the second information. The second offset can be a subcarrier granularity offset. The second information can be the subcarrier offset value (ssb-subcarrieroffset) of the SSB in the main information block.

[0092] For example, when the initial 20MHz access channel allocation of NR-U differs from the frequency band allocation of existing wireless local area network (WiFi) general standards, the frequency domain transmission position of the SSB may not be fixed. The terminal device can determine the lowest carrier frequency of the physical resource block (PRB) where the lowest carrier is located based on the second information and the following formula (1) or formula (2). Then, based on the first information, it can determine the time-frequency resource position of CORESET 0 in the 20MHz bandwidth where the SSB is located, thereby determining the sequence number of the first RB corresponding to CORESET 0 and the sequence number of the subcarrier in the first RB. Wherein, when the preset subcarrier interval is 30kHz, formula (1) is used. When the preset subcarrier interval is 15kHz, formula (2) is used. The lowest carrier frequency can be the starting position of the subcarrier of the occupied resource.

[0093] The lowest carrier frequency of the PRB containing the lowest carrier of the SSB = the frequency of the lowest carrier of the SSB - K_ssb*30kHz (1) The lowest carrier frequency of the PRB containing the lowest carrier of the SSB = the frequency of the lowest carrier of the SSB - K_ssb*15kHz (2)

[0094] Since the SSB and the corresponding CORESET 0 have the same subcarrier spacing, when the terminal device blindly detects the SSB and confirms that its subcarrier spacing is 30kHz, the above offset value ranges from 0 to 11 subcarriers. Therefore, only 4 bits of indication overhead are needed to indicate K_ssb, which is the subcarrier offset value of the SSB (ssb-subcarrieroffset). When the terminal device blindly detects the SSB and its subcarrier spacing is 15kHz, the above offset value also ranges from 0 to 11 subcarriers, so only 4 bits of indication overhead are needed to indicate K_ssb.

[0095] Therefore, for the NR-U system, the value range of ssb-subcarrieroffset is 0-11, and only 4 bits are needed in the main information block to indicate it, which can save 1 bit of indication overhead compared to NR.

[0096] In some embodiments, the bandwidth of the synchronization signal block corresponding to the first information (the main information block where the first information is located) is aligned with the frequency band of the wireless local area network, and the synchronization signal block is transmitted at a preset position in the bandwidth.

[0097] For example, since NR-U needs to consider coexistence with Wi-Fi in the 5GHz band, one possible approach is to divide the channel according to the same frequency band as Wi-Fi and transmit data / control information. For instance, a Subcarrier Offset (SSB) can be transmitted at a fixed position in each 20MHz band. When the terminal device detects the SSB, it can determine the offset between the starting position of the SSB in the frequency domain and the starting position of the 20MHz bandwidth in the frequency domain. Since the SSB frequency domain position is fixed, no additional indication is needed. The information in the main information block used to indicate the SSB-subcarrier offset can be used for other purposes. For example, the second information can be used to indicate at least one reference signal, which has a quasi-co-location (QCL) relationship with the synchronization signal block, thereby assisting the terminal device in beamforming or receiving processing and improving random access efficiency. The second information can also indicate whether paging is sent, the length of the demodulation reference signal unit (DRS unit), etc., which will not be illustrated in detail in this application.

[0098] In this embodiment, when the NR-U channel allocation is the same as the general standard for wireless local area networks, the second offset can be determined based on the frequency point and corresponding frequency band of the detected SSB, thus eliminating the need for indication in the main information block and reducing indication overhead.

[0099] In another embodiment, the network device also sends third information to the terminal device, which indicates the configuration of the control resource set 0 (CORESET0) and the configuration of the type 0 PDCCH (type 0-PDCCH) common search space (searchSpace Zero). This third information is carried in the MIB information of the SSB, and referring to Table 3, this third information is the index value in the table. When the SSB and CORESET0 use time division multiplexing (TDM), the terminal device can obtain the detection position of the type 0-PDCCH common search space associated with SSB i based on the parameters M, O, and the first symbol index of the SSB, as well as the SSB index (index) i, in Table 3. Here, M is a parameter related to the number of Type 0-PDCCH common search spaces in each slot. The terminal device can search for PDCCHs at the obtained detection position. Table 3 is predefined by the standard or sent by the network device to the terminal device.

[0100] The following provides a further description: the common search space for type-0PDCCH associated with SSB i is the system frame number (SFN). C Within a frame, two consecutive slots starting from slot n0, where slot n0 satisfies the following rule:

[0101]

[0102] in, This represents the number of slots contained in a system frame. The number of slots in a system frame varies depending on the subcarrier spacing. For example, if the subcarrier spacing is 15kHz, a system frame includes 10 slots; if the subcarrier spacing is 30kHz, a system frame includes 20 slots. μ is related to the subcarrier spacing; for example, if the subcarrier spacing is 15kHz, μ = 0; if the subcarrier spacing is 30kHz, μ = 1.

[0103] System Frame Number SFN C The following rules must be met:

[0104] like SFN C mod2 = 0, in this case, SFN C It is an even number;

[0105] like SFN C mod2 = 1, in this case, SFNC It is an odd number.

[0106] Table 3: Parameters for PDCCH monitoring occasions for Type0-PDCCH CSSset-SS / PBCH block and CORESET multiplexing pattern 1and FR1

[0107]

[0108] The "Number of search space sets per slot" indicates the number of search space sets in each slot.

[0109] In one embodiment, searchSpaceZero includes entries from Table 4 to increase the flexibility of network devices in sending DRS. Table 4 shows the network devices in SFN with configurations corresponding to 0=10 and 0=15. C Sending DRS for an odd number of frames can also configure the Type0-PDCCH common search space set (CSS set) to the same slot as the SSB associated with the Type0-PDCCH CSS set. When M = 1 / 2 and the number of search space sets per slot is 1, the configuration allows the terminal device to detect the Type-0 PDCCH CSS set once per slot value, while configuring the Type0-PDCCH CSS set to the same slot as the associated SSB. In practice, it may also only include a subset of the sets in Table 4. These entries can be added to existing tables, such as Table 3, or can replace Table 3 in the existing standard.

[0110] Table 4: Parameters for PDCCH monitoring occasions for Type0-PDCCH CSSset-SS / PBCH block and CORESET multiplexing pattern 1 and FR1

[0111]

[0112] Here, `if i is odd` indicates the case where the SSB index is odd, and `if i is even` indicates the case where the SSB index is even. The `First symbol index` in the table includes configurations of `{6, if i is odd}` and `{7, if i is odd}`, allowing the terminal device to detect the Type0-PDCCH CSS set starting from symbol 6 or symbol 7 in the same subframe as the odd-numbered SSB associated with the Type0-PDCCH CSS set. This allows the gNB to continuously transmit Type0-PDCCH and SSB using the same beam, avoiding continuous beam switching within a short period. This indicates the number of symbols occupied by CORESET0, for example, the number of symbols occupied by CORESET0 within a time slot.

[0113] Taking a network device sending 8 SSBs, with the Type 0-PDCCH and RMSIPDSCH corresponding to each SSB lasting for one slot as an example, the network device can use the following... Figure 9 The SSB, along with its corresponding Type0-PDCCH and RMSIPDSCH, is transmitted in the following manner. For SSBs transmitted in slots 1-4, these four SSBs are sent from candidate positions in the first half of the slot (or even-numbered SSB positions), with candidate positions occupying symbols 2, 3, 4, and 5. For SSBs transmitted in slots 5-8, these four SSBs are sent from candidate positions in the second half of the slot (or odd-numbered SSB positions), with candidate positions occupying symbols 9, 10, 11, 12 (not shown in the figure) or 8, 9, 10, 11. The terminal device will detect the Type0-PDCCH corresponding to the SSB in the first few symbols of the slot where the SSB is located (which can be symbol 0, or symbols 0, 1). Figure 9 The positions marked with X / Y represent candidate SSB positions within the DRS transmission window that can be used to transmit SSBs. Figure 9In the illustrated embodiment, X represents the PBCH DMRS sequence index in the SSB transmitted at the candidate SSB location, and the value of X can be 0, 1, 2, ..., 7; Y represents the indication information carried in the PBCH payload transmitted at the candidate SSB location, and the value of Y can be 0, 1, or 2. The network device can instruct the terminal device to use the index value as shown in Table 3 above in the MIB carried by the PBCH in the SSB. In other words, this third information can be the index in Table 4, and the value of the third information is the value of the index. For example, the network device can instruct the terminal device to use the configuration corresponding to index = 0, 4, 8, 12, then the terminal device can perform PDCCH retrieval according to the configuration corresponding to index = 0, 4, 8, 12. The terminal device can obtain the SSB sequence number from the PBCH DMRS sequence index and the PBCH payload, and based on the sequence numbers of the PBCH DMRS sequences in the detected multiple SSBs, obtain the quasi-colocation (QCL) relationship between the detected different SSBs. If SSBs located in the latter half of the slot are not allowed to be associated with the Type0-PDCCHCSS set starting from symbol 0, it is impossible to support the transmission of SSBs with 8 different QCL assumptions in the DRS. Furthermore, the Type0-PDCCH and RMSI-PDSCH associated with the SSB occupy the entire slot, thus affecting system coverage or increasing interference to surrounding users. The configuration proposed in this application solves this technical problem.

[0114] In another implementation, this application proposes a configuration for when the minimum DRS transmission period is less than 20ms. When the minimum DRS transmission period is less than 20ms, searchSpaceZero can use the configuration shown in Table 5 below:

[0115] Table 5: Parameters for PDCCH monitoring occasions for Type0-PDCCH CSSset-SS / PBCH block and CORESET multiplexing pattern 1 and FR1

[0116]

[0117] Therefore, even when the DRS transmission period is less than 20ms, it can still support configuring the Type0-PDCCH CSS set to the same slot as the associated SSB, avoiding the inability to use M and O to indicate the slot and system frame where the Type0-PDCCH CSS set is detected. SFC C The system frame containing the Type0-PDCCH common search space set, SFN ssb，i The system frame where the SSB is located, associated with the Type 0-PDCCH common search space set. SFC C =SFN ssb，i This indicates that the system frame containing the Type0-PDCCH common search space set and the system frame containing the SSB associated with the Type0-PDCCH common search space set are the same system frame. c n represents the time slot in the system frame where the Type0-PDCCH common search space set is located. SSB，i The time slot in the system frame where the SSB associated with the Type0-PDCCH common search space set is located. This indicates that the time slot in the system frame containing the Type0-PDCCH common search space set and the time slot in the system frame containing the SSB associated with the Type0-PDCCH common search space set are the same time slot. Here, "if i is odd" indicates the case where the SSB index is odd, and "if i is even" indicates the case where the SSB index is even.

[0118] The synchronization signal grid involved in this application will be explained below:

[0119] The synchronization raster represents the frequency domain location of the synchronization signal block used by the UE for system access. Optionally, when there is no signaling explicitly indicating the location of the synchronization signal block, the UE determines the frequency domain location of the synchronization signal block through the synchronization raster. Within the synchronization raster, the frequency domain location of the synchronization signal block is defined as the SSB reference frequency SS. REF Each SSB reference frequency is designated GSCN; in other words, each SSB reference frequency corresponds to a global synchronization channel number (GSCN). Different GSCN values ​​can be defined for all available frequency ranges globally. Please refer to Table 5.4.3.1-1 in Section 5.4.3.2 of 3GPP 38.101-1, which provides the values ​​corresponding to the synchronization signal block reference frequency SS. REF The corresponding resource elements define the synchronization signal grid and SSB subcarrier spacing for each frequency band:

[0120] Table 5.4.3.1-1:GSCN parameters for the global frequency raster

[0121]

[0122] Optionally, in some embodiments, the first frequency domain offset information between CORESET 0 and the synchronization signal block or synchronization signal grid value is preset by the system, and the first frequency domain offset information can be referred to as "first frequency domain offset". The synchronization signal block can be an SS block or an SS / PBCH block. The first frequency domain offset information can be frequency domain offset information in units such as Hz, MHz, kHz, etc., or frequency domain offset information in units such as subcarriers, resource blocks (PRBs), resource units (REs). It is understood that when different configuration methods are used, such as different subcarrier intervals, the value corresponding to the first frequency domain offset information may be different. However, it should be understood that mathematical conversions can be performed between the first frequency domain offset information represented by different basic units, and this application does not impose any limitations. For example, the synchronization signal grid value refers to the SS on the synchronization signal grid. REF When the first frequency domain offset information indicates the offset between CORESET 0 and the synchronization signal block, the UE determines the offset based on the SS value corresponding to the synchronization signal block in the synchronization signal block grid. REF To determine the first frequency domain offset information relative to CORESET 0, specifically, the base station transmits a synchronization signal block, and correspondingly, the UE detects the synchronization signal block and determines the first frequency domain offset information of CORESET 0 based on the GSCN corresponding to the detected synchronization signal block (refer to Table 5.4.3.1-1 and Table 5 below), thereby determining the position of CORESET 0. Alternatively, exemplarily, the UE detects the synchronization signal block on the synchronization signal grid. Where the frequency domain offset value represents the offset between CORESET 0 and the synchronization signal block grid value, the UE determines the position of CORESET 0 based on the SSCN of the synchronization signal block grid. REF Determine the frequency domain offset information from CORESET0.

[0123] For example, A and B are used below to represent CORESET 0, or synchronization signal block / synchronization signal block grid value. When A represents CORESET 0, B represents synchronization signal block or synchronization signal grid; when A represents synchronization signal block or synchronization signal grid, B represents CORESET 0. The first frequency domain offset information between A and B can be represented by the offset between the starting frequency domain position of A and the starting frequency domain position of B, or by the offset between the center frequency position of A and the center frequency position of B, or by the offset between the ending frequency domain position of A and the ending frequency domain position of B. That is, it can be implemented by arbitrarily selecting an element from the two sets {the lowest frequency domain position of A, the highest frequency domain position of A, the center frequency position of A, etc.} and {the lowest frequency domain position of B, the highest frequency domain position of B, the center frequency position of B, etc.} and combining them. It is understood that the first frequency domain offset information can be a number greater than 0 and / or equal to 0 and / or less than 0. The relative positions of A and B can be distinguished by positive and negative values. For example, if the first frequency domain offset information is negative, it means that the starting frequency position of A is lower than the starting frequency position of B.

[0124] Taking the first frequency domain offset information as the frequency domain offset information between the starting position of CORESET 0 in the frequency domain and the starting position of the synchronization signal block in the frequency domain, or the first frequency domain offset information as the frequency domain offset information between the starting position of CORESET 0 in the frequency domain and the synchronization signal grid as an example. In some embodiments, the positions of some synchronization signal blocks in the frequency domain are preset by the system. For example, the frequency domain positions of the synchronization signal blocks are defined by the synchronization signal block grid. The synchronization signal block grid corresponds one-to-one with the frequency point information corresponding to the synchronization signal block, such as the GSCN defined in Table 5.4.3.1-1 of NR38.101-1. One GSCN value corresponds to a reference frequency point of one synchronization signal block. The reference frequency point is the center frequency point corresponding to the synchronization signal block. The frequency point can be specific frequency point information in units such as Hz, MHz, kHz, etc., such as 5000MHz. Furthermore, for synchronization signal blocks or synchronization signal block grids (or GSCNs) at different frequency domain locations, the first frequency domain offset information of CORESET 0 relative to the synchronization signal blocks or synchronization signal block grids (or GSCNs) at different frequency domain locations can be the same or different. Different first frequency domain offset information can be defined for each synchronization signal block or synchronization signal block grid (or GSCN). It is understood that since the frequency domain location of each synchronization signal block or synchronization signal block grid (GSCN) is preset by the system, the frequency domain location of CORESET 0 can be determined based on the frequency domain location information of the synchronization signal block or synchronization signal block grid (or GSCN) and the corresponding first frequency domain offset information. For example, the first frequency domain offset information between CORESET 0 and the synchronization signal block or synchronization signal grid can be preset in the form of a table. The first information can correspond to an index, and an index can correspond to a set of configurations. These configurations include the pattern of the synchronization signal block, the configuration information of CORESET 0 (which can be one or more combinations of RB number and symbol number), and one or more of the frequency domain offset information. Tables 3 and 4 show the configuration parameter tables for different indices corresponding to the first information under different subcarrier spacing scenarios. Furthermore, the first frequency domain offset information is preset using Table 5, which shows the first frequency domain offset information between CORESET 0 and different synchronization signal blocks under different subcarrier spacing scenarios for different preset synchronization signal grid positions (GSCN). In the example, O... 15kHz This represents the frequency domain offset information represented by the PRB defined by a 15kHz subcarrier spacing as the basic unit. 30kHzThis represents the frequency domain offset information represented by the PRB defined with a 30kHz subcarrier spacing as the basic unit. It is understood that the parameters defined in Tables 3, 4, and 5 are for illustrative purposes only, and the formats of Tables 3, 4, and 5 can be combined without limitation.

[0125] Optionally, in some embodiments, in addition to the first frequency domain offset information, a second frequency domain offset information may be included. This second frequency domain offset information is indicated via system messages and / or RRC signaling and / or DCI signaling. The frequency domain offset between CORESET 0 and the synchronization signal block or synchronization signal grid value can be determined by combining the first and second frequency domain offset information, where the second frequency domain offset information can be understood as an offset amount. For example, the frequency domain offset information = first frequency domain offset information + second frequency domain offset information, where the first frequency domain offset information is offset information in PRB units, and the second frequency domain offset information is offset information in subcarrier units, thereby enabling more flexible indication.

[0126] Table 3 Subcarrier Spacing = 15kHz CORESET 0 Configuration Parameter Table

[0127]

[0128] Table 4 Subcarrier Spacing = 30kHz CORESET 0 Configuration Parameter Table

[0129]

[0130] Table 5. Subcarrier Spacing = 15kHz, 30kHz CORESET 0 Offset Configuration Parameters Relative to GSCN

[0131] GSCN O 15kHz ]]> O 30kHz ]] GSCN O 15kHz ]]> O 30kHz ]]> GSCN O 15kHz ]]> O 30kHz ]]> 8996 14 2 9232 13 2 9385 15 3 9010 15 3 9246 14 2 9402 12 1 9024 15 3 9260 15 3 9416 13 2 9037 8 0 9274 15 3 9430 13 2 9051 9 0 9287 8 0 9444 14 2 9065 10 0 9301 9 0 9458 15 3 9079 11 1 9315 10 0 9471 8 0 9093 12 1 9329 11 1 9485 9 0 9107 13 2 9343 12 1 9499 10 0 9121 14 2 9357 13 2 9513 11 1 9218 12 1 9371 14 2

[0132] The relevant features of this embodiment can be referenced from the foregoing embodiments or the following embodiments; therefore, repeated parts are not described again. Furthermore, the network devices or terminals (or related modules, chips, systems, computer programs, storage media) involved in the subordinate device or system embodiments can also be used to execute the methods provided in the embodiments of this application.

[0133] The method for indicating control information according to embodiments of this application has been described in detail above. The communication device according to embodiments of this application will be described below.

[0134] This application describes in detail the schematic structure of a communication device.

[0135] In one example Figure 5A schematic block diagram of a communication device 5000 according to an embodiment of this application is shown. The device 5000 of this application embodiment can be a terminal device as described in the above method embodiments, or it can be one or more chips within a terminal device. The device 5000 can be used to perform some or all of the functions of the terminal device in the above method embodiments. The device 5000 may include a transceiver module 5010 and a processing module 5020; optionally, the device 5000 may also include a storage module 5030.

[0136] For example, the transceiver module 5010 can be used to receive the master information block from the network device in step 101 of the aforementioned method embodiment, and to receive the downlink control information from the network device in step 103.

[0137] The processing module 5020 can be used to execute step 102 in the aforementioned method embodiment.

[0138] Alternatively, device 5000 can also be configured as a general-purpose processing system, such as a chip. The processing module 5020 may include one or more processors providing processing functions. The transceiver module 5010 may be, for example, an input / output interface, pins, or circuitry. The input / output interface can be used to handle information interaction between this chip system and the outside world. For example, this input / output interface can output uplink data from the terminal device to other modules outside the chip for processing. This processing module can execute computer execution instructions stored in the storage module to achieve the functions of the terminal device in the above method embodiments. In one example, the storage module 5030 optionally included in device 5000 can be a storage unit within the chip, such as a register or cache. The storage module 5030 can also be a storage unit located outside the chip within the terminal device, such as read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, such as random access memory (RAM).

[0139] In another example, Figure 6A schematic block diagram of another communication device 5100 according to an embodiment of this application is shown. The device 5100 of this application embodiment can be a terminal device as described in the above method embodiments, and can be used to perform some or all of the functions of the terminal device in the above method embodiments. The device 5100 may include a processor 5110, a baseband circuit 5130, a radio frequency circuit 5140, and an antenna 5150. Optionally, the device 5100 may also include a memory 5120. The processor 5110, memory 5120, and baseband circuit 5130 of the device 5100 are coupled together via a bus 5160, wherein the bus system 5160 includes a data bus, a power bus, a control bus, and a status signal bus. However, for clarity, all buses are labeled as bus system 5160 in the figure. The baseband circuit 5130 and the radio frequency circuit 5140 are connected, and the radio frequency circuit 5140 and the antenna 5150 are connected.

[0140] The processor 5110 can be used to control the terminal device, to execute the processing performed by the terminal device in the above embodiments, to execute the processing procedures involving the terminal device in the above method embodiments and / or other processes used in the technology described in this application, and can also run an operating system, be responsible for managing the bus, and execute programs or instructions stored in memory.

[0141] The baseband circuit 5130, radio frequency circuit 5140, and antenna 5150 can be used to support the transmission and reception of information between the terminal device and the network device involved in the above embodiments, so as to support wireless communication between the terminal device and the network device. In one example, the main information block sent from the network device is received by the antenna 5150, filtered, amplified, down-converted, and digitized by the radio frequency circuit 5140, and then decoded and decapsulated according to the protocol by the baseband circuit 5130. Finally, it is processed by the processor 5110 to recover the signaling information sent by the network device. In another example, the uplink data of the terminal device can be processed by the processor 5110, encapsulated and encoded according to the protocol by the baseband circuit 5130, and further processed by the radio frequency circuit 5140 through analog conversion, filtering, amplification, and up-conversion before being transmitted through the antenna 5150.

[0142] Memory 5120 can be used to store the site's program code and data; memory 5120 can be Figure 5 The storage module 5030 is included. Understandably, the baseband circuit 5130, radio frequency circuit 5140, and antenna 5150 can also be used to support communication between the terminal device and other network entities, for example, to support communication between the terminal device and network elements on the core network side. Figure 6The memory 5120 is shown as separate from the processor 5110; however, those skilled in the art will readily understand that the memory 5120 or any portion thereof may be located outside the communication device 5100. For example, the memory 5120 may include transmission lines and / or computer artifacts separate from the wireless node, all of which can be accessed by the processor 5110 via the bus interface 5160. Alternatively, the memory 5120 or any portion thereof may be integrated into the processor 5110, for example, as a cache and / or general-purpose registers.

[0143] Understandable Figure 6 This is merely a simplified design of the terminal device. For example, in practical applications, the terminal device can include any number of transmitters, receivers, processors, memory, etc., and all terminal devices that can implement this application are within the protection scope of this application.

[0144] In one possible implementation, the communication device may also be implemented using one or more field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application. In yet another example, embodiments of this application also provide a computer storage medium that can store program instructions for instructing any of the above methods, causing a processor to execute these program instructions to implement the methods and functions of the terminal device involved in the above method embodiments.

[0145] This application describes in detail the schematic structure of a communication device according to embodiments. In one example... Figure 7 A schematic block diagram of a communication device 5200 according to an embodiment of this application is shown. The device 5200 of this application embodiment can be a network device in the above method embodiments, or it can be one or more chips within a network device. The device 5200 can be used to perform some or all of the functions of the network device in the above method embodiments. The device 5200 may include a processing module 5210 and a transceiver module 5220; optionally, the device 5200 may further include a storage module 5230.

[0146] For example, the transceiver module 5220 can be used by the network device to send the main information block of step 101 in the aforementioned method embodiment and to send the downlink control information in step 103;

[0147] Alternatively, device 5200 can also be configured as a general-purpose processing system, such as a chip. The processing module 5210 may include one or more processors providing processing functions. The transceiver module may be, for example, an input / output interface, pins, or circuits. The input / output interface can be used to handle information interaction between this chip system and the outside world; for example, this input / output interface can output the main information block to other modules outside the chip for processing. The one or more processors can execute computer execution instructions stored in the storage module to implement the functions of the network device in the above method embodiments. In one example, the storage module 5230 optionally included in device 5200 can be an in-chip storage unit, such as a register or cache. The storage module 5230 can also be an external storage unit within the network device, such as read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, such as random access memory (RAM).

[0148] In another example, Figure 8 A schematic block diagram of another communication device 5300 according to an embodiment of this application is shown. The device 5300 of this application embodiment can be a network device in the above-described method embodiments, and can be used to perform some or all of the functions of the network device in the above-described method embodiments. The device 5300 may include a processor 5310, a baseband circuit 5330, a radio frequency circuit 5340, and an antenna 5350. Optionally, the device 5300 may also include a memory 5320. The processor 5310, memory 5320, and baseband circuit 5330 of the device 5300 are coupled together via a bus 5360, wherein the bus system 5360 includes, in addition to a data bus, a power bus, a control bus, and a status signal bus. However, for clarity, all buses are labeled as bus system 5360 in the figure. The baseband circuit 5330 and the radio frequency circuit 5340 are connected, and the radio frequency circuit 5340 and the antenna 5350 are connected.

[0149] The processor 5310 can be used to control network devices, to perform the processes performed by the network devices in the above embodiments, to perform the processing procedures involving the network devices in the above method embodiments and / or other processes using the technology described in this application, and can also run an operating system, be responsible for managing the bus, and execute programs or instructions stored in memory.

[0150] The baseband circuit 5330, radio frequency circuit 5340, and antenna 5350 can be used to support the transmission and reception of information between the network device and the terminal device involved in the above embodiments, so as to support wireless communication between the network device and the terminal device. In one example, the main information block of the network device can be processed by the processor 5310, and after baseband processing such as protocol encapsulation and encoding by the baseband circuit 5330, it is further processed by the radio frequency circuit 5340 through analog conversion, filtering, amplification, and up-conversion, and then transmitted through the antenna 5350. The memory 5320 can be used to store the program code and data of the network device. The memory 5320 can be... Figure 7 The storage module 5230 is included. Understandably, the baseband circuit 5330, radio frequency circuit 5340, and antenna 5350 can also be used to support communication between network devices and other network entities, for example, to support communication between network devices and other network devices.

[0151] Understandable Figure 8 This illustration only shows a simplified design of the network device. For example, in practical applications, the network device can contain any number of transmitters, receivers, processors, memory, etc., and all network devices that can implement this application are within the protection scope of the embodiments of this application.

[0152] In one possible implementation, the communication device may also be implemented using one or more field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.

[0153] In yet another example, this application embodiment also provides a computer storage medium that can store program instructions for instructing any of the above methods, such that a processor executes the program instructions to implement the methods and functions of the network device involved in the above method embodiments.

[0154] The processors involved in the aforementioned devices 5100 and 5300 can be general-purpose processors, such as general-purpose central processing units (CPUs), network processors (NPs), microprocessors, etc., or application-specific integrated circuits (ASICs), or one or more integrated circuits used to control the execution of programs according to the present application. They can also be digital signal processors (DSPs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The controller / processor can also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc. The processor typically performs logical and arithmetic operations based on program instructions stored in memory.

[0155] The memory involved in the aforementioned devices 5100 and 5300 may also store an operating system and other application programs. Specifically, the program may include program code, which includes computer operation instructions. More specifically, the aforementioned memory may be read-only memory (ROM), other types of static storage devices capable of storing static information and instructions, random access memory (RAM), other types of dynamic storage devices capable of storing information and instructions, disk storage, etc. The memory may be a combination of the above storage types. Furthermore, the aforementioned computer-readable storage medium / memory may be located within a processor, external to a processor, or distributed across multiple entities including a processor or processing circuitry. The aforementioned computer-readable storage medium / memory may be embodied in a computer program product. For example, a computer program product may include a computer-readable medium within packaging material.

[0156] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0157] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0158] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0159] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0160] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive).

Claims

1. A method for indicating control information, characterized in that, Comprising: receiving first information sent by a network device, the first information being used to indicate a number of symbols occupied by a control information resource set CORESET 0 in a time domain and a first offset in a frequency domain; determining a time-frequency resource location of the CORESET 0 according to the first information and a predetermined subcarrier spacing; receiving downlink control information at the time-frequency resource location of the CORESET 0; wherein the first offset is any one of X1, X2, X3 or X4, X1, X2, X3 and X4 are integers and not equal; wherein a slot containing 14 symbols supports transmission of two synchronization signal blocks SSBs, a starting position of a first synchronization signal block SSB is symbol 2, and a starting position of a second synchronization signal block SSB is symbol 9; the slot containing 14 symbols also contains two detection positions of Type0-PDCCH common search spaces and supports transmission of two CORESET 0s, the two detection positions of Type0-PDCCH common search spaces and the two CORESET 0s are respectively corresponding and associated, wherein a starting symbol of the detection position of Type0-PDCCH common search space corresponding to the first SSB is symbol 0, and a starting symbol of the detection position of Type0-PDCCH common search space corresponding to the second SSB is symbol 7.

2. The method of claim 1, wherein, The receiving first information sent by a network device comprises: in an initial access stage, detecting a synchronization signal block SSB to obtain a physical broadcast channel PBCH, and obtaining the first information by analyzing a master information block MIB in the physical broadcast channel PBCH.

3. The method according to any one of claims 1 to 2, characterized in that, Further comprising: receiving third information sent by a network device, the third information being used to indicate a configuration of a CORESET 0 and a configuration of a type0-PDCCH common search space; determining a detection position of the Type0-PDCCH common search space associated with an SSB according to the third information; receiving the downlink control information according to the detection position of the Type0-PDCCH common search space, the Type0-PDCCH being carried in the CORESET 0.

4. The method according to any one of claims 1 to 2, characterized in that, When a slot supports transmission of one or more synchronization signal blocks SSBs and CORESET 0s, the first information is also used to indicate a number of CORESET 0s in each slot.

5. The method of any one of claims 1 to 2, wherein, The first offset is used to indicate a serial number of a first resource block RB corresponding to the CORESET 0, the first RB being located in a partial bandwidth where an SSB corresponding to the first information is located.

6. The method according to any one of claims 1 to 2, characterized in that, When the predetermined subcarrier spacing is 15 kHz or 30 kHz, the first information is four bits.

7. The method according to any one of claims 1 to 2, characterized in that, The method further comprises: receive second information sent by the network device, the second information being used for indicating a second offset of a CORESET 0 in a frequency domain, the second offset being used for indicating a serial number of a subcarrier in a first RB corresponding to the CORESET 0, wherein the second offset is any one of 0 to 11, and a time-frequency resource position of the CORESET 0 is determined according to the first information and the second information.

8. The method according to any one of claims 1 to 2, characterized in that, The partial bandwidth where the SSB corresponding to the first information is located is aligned with a frequency band of a wireless local area network, and the SSB is sent at a preset position of the partial bandwidth.

9. The method of claim 8, wherein, The method further includes: receive second information sent by the network device, the second information being used for indicating at least one reference signal, and the at least one reference signal being in a quasi-co-located relationship with the synchronization signal block.

10. A method for indicating control information, characterized by, including: send first information to a terminal device, the first information being used for indicating a number of symbols occupied by a control information resource set CORESET 0 in a time domain and a first offset in a frequency domain; send downlink control information at a time-frequency resource position of the CORESET 0; wherein the first offset is any one of X1, X2, X3, or X4, X1, X2, X3, and X4 are integers and are not equal; wherein a time slot containing 14 symbols supports sending of two synchronization signal blocks SSBs, a starting position of a first synchronization signal block SSB is symbol 2, and a starting position of a second synchronization signal block SSB is symbol 9; the time slot containing 14 symbols also contains two detection positions of Type0-PDCCH common search spaces and supports sending of two CORESET 0s, the two detection positions of Type0-PDCCH common search spaces and the two SSBs correspond to each other respectively and are associated with the two CORESET 0s respectively, wherein a starting symbol of the detection position of Type0-PDCCH common search space corresponding to the first SSB is symbol 0, and a starting symbol of the detection position of Type0-PDCCH common search space corresponding to the second SSB is symbol 7.

11. The method of claim 10, wherein, The sending of the first information to the terminal device includes sending the first information in a master information block MIB in a physical broadcast channel PBCH.

12. The method according to any one of claims 10 to 11, characterized in that, Further including: send third information to the terminal device.

13. The method of any one of claims 10 to 11, wherein, The method further includes: send second information to the terminal device, the second information being used for indicating a second offset of a CORESET 0 in a frequency domain, the second offset being used for indicating a serial number of a subcarrier interval in a first RB corresponding to the CORESET 0, wherein the second offset is any one of 0 to 11.

14. The method of any one of claims 10 to 11, wherein, The partial bandwidth where the synchronization signal block corresponding to the first information is located is aligned with a frequency band division of a wireless local area network, and the synchronization signal block is sent at a preset position of the partial bandwidth.

15. The method of claim 14, wherein, The method further includes: send second information to the terminal device, the second information being used for indicating at least one reference signal, and the at least one reference signal being in a quasi-co-located relationship with the synchronization signal block.

16. A wireless communication device, comprising: including: The transceiver is configured to receive first information sent by the network device, the first information being used to indicate a number of symbols occupied by a control information resource set (CORESET 0) in a time domain and a first offset in a frequency domain. The processor is configured to determine a time-frequency resource location of the CORESET 0 according to the first information and a predetermined subcarrier spacing. The processor is further configured to receive downlink control information at the time-frequency resource location of the CORESET 0 through the transceiver. The first offset is any one of X1, X2, X3 or X4, and X1, X2, X3 and X4 are integers and are not equal. A slot containing 14 symbols supports transmission of two synchronization signal blocks (SSBs), a first synchronization signal block (SSB) has a starting position of symbol 2, and a second synchronization signal block (SSB) has a starting position of symbol 9. The slot containing 14 symbols also contains two Type0-PDCCH common search space detection positions and supports transmission of two CORESET 0s, the two Type0-PDCCH common search space detection positions correspond to the two SSBs respectively and are associated with the two CORESET 0s respectively, wherein a starting symbol of the Type0-PDCCH common search space detection position corresponding to the first SSB is symbol 0, and a starting symbol of the Type0-PDCCH common search space detection position corresponding to the second SSB is symbol 7.

17. The apparatus of claim 16, wherein, When the transceiver receives the first information sent by the network device, the transceiver is specifically configured to, in an initial access stage, detect a synchronization signal block to obtain a physical broadcast channel (PBCH), and obtain the first information by analyzing a master information block (MIB) in the physical broadcast channel (PBCH).

18. The apparatus of any one of claims 16-17, wherein The transceiver is further configured to receive third information sent by the network device, the third information being used to indicate a configuration of the CORESET 0 and a configuration of a type0-PDCCH common search space. The processor is further configured to determine a detection position of the Type0-PDCCH common search space associated with an SSB according to the third information, and receive downlink control information according to the detection position of the Type0-PDCCH common search space, the Type0-PDCCH being carried in the CORESET 0.

19. The apparatus of any one of claims 16-17, wherein, When a slot supports transmission of one or more synchronization signal blocks (SSBs) and CORESET 0s, the first information is further used to indicate a number of CORESET 0s in each slot.

20. The apparatus of any one of claims 16-17, wherein, The first offset is used to indicate a serial number of a first resource block (RB) corresponding to the CORESET 0, and the first RB is located in a partial bandwidth of a synchronization signal block corresponding to the first information.

21. The apparatus of any one of claims 16-17, wherein, When the predetermined subcarrier spacing is 15 kHz or 30 kHz, the first information is four bits.

22. The apparatus of any one of claims 16-17, wherein, The transceiver is further configured to receive second information sent by the network device, the second information being used to indicate a second offset of the CORESET 0 in a frequency domain, the second offset being used to indicate a serial number of a subcarrier in a first RB corresponding to the CORESET 0, wherein the second offset is any one of 0 to 11, and a time-frequency resource position of the CORESET 0 is determined according to the first information and the second information.

23. The apparatus of any one of claims 16-17, wherein, The partial bandwidth where the synchronization signal block corresponding to the first information is located is aligned with a frequency band of the wireless local area network, and the synchronization signal block is sent at a preset position of the partial bandwidth.

24. The apparatus of claim 23, wherein, The transceiver is further configured to receive second information sent by the network device, the second information being used to indicate at least one reference signal, and the at least one reference signal is in a quasi-co-location relationship with the synchronization signal block.

25. A wireless communication device, comprising: Comprise: A transceiver configured to send first information to a terminal device, the first information being used to indicate a number of symbols occupied by a control information resource set CORESET 0 in a time domain and a first offset in a frequency domain; A processor configured to send downlink control information at a time-frequency resource position of the CORESET 0 through the transceiver; Wherein the first offset is any one of X1, X2, X3, or X4, X1, X2, X3, and X4 are integers and are not equal; Wherein a time slot containing 14 symbols supports the sending of two synchronization signal blocks SSBs, the starting position of a first synchronization signal block SSB is symbol 2, and the starting position of a second synchronization signal block SSB is symbol 9; the time slot containing 14 symbols also contains two detection positions of Type0-PDCCH common search spaces and supports the sending of two CORESET 0s, the two detection positions of Type0-PDCCH common search spaces and the two SSBs correspond to each other respectively, and are associated with the two CORESET 0s respectively, wherein the starting symbol of the detection position of the Type0-PDCCH common search space corresponding to the first SSB is symbol 0, and the starting symbol of the detection position of the Type0-PDCCH common search space corresponding to the second SSB is symbol 7.

26. The apparatus of claim 25, wherein, The transceiver, when sending the first information to the terminal device, is specifically configured to send the first information in a master information block MIB in a physical broadcast channel PBCH.

27. The apparatus of any one of claims 25-26, wherein, The transceiver is further configured to send third information to the terminal device.

28. The apparatus of any one of claims 25-26, wherein, The transceiver is further configured to send second information to the terminal device, the second information being used to indicate a second offset of the CORESET 0 in a frequency domain, the second offset being used to indicate a serial number of a subcarrier interval in a first RB corresponding to the CORESET 0, wherein the second offset is any one of 0 to 11.

29. The apparatus of any one of claims 25-26, wherein, The partial bandwidth where the synchronization signal block corresponding to the first information is located is aligned with a frequency band division of the wireless local area network, and the synchronization signal block is sent at a preset position of the partial bandwidth.

30. The apparatus of claim 29, wherein, The transceiver is further configured to send, to the terminal device, second information, the second information being used for indicating at least one reference signal, the at least one reference signal being in a quasi co-location relationship with the synchronization signal block.

31. A terminal device, comprising: Comprising: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method according to any one of claims 1-9.

32. A network device, comprising: Comprising: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method according to any one of claims 10-15.

33. A computer-readable storage medium, comprising: A computer program, when executed on a computer, causes the computer to perform the method according to any one of claims 1-9, or the method according to any one of claims 10-15.

34. A computer program product, characterised in that, A computer program for performing the method according to any one of claims 1-9, or the method according to any one of claims 10-15, when the computer program is executed on a computer.

35. A chip, comprising: A processor and a memory, the memory being configured to store a computer program, the processor being configured to invoke and run the computer program stored in the memory, so as to perform the method according to any one of claims 1-9, or the method according to any one of claims 10-15.

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