Method, apparatus and communication system for transmitting signals

Abstract

The application provides a signal transmission method, device and communication system. The device comprises a first transmission unit configured to receive a first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB), the first synchronization signal / physical broadcast channel block not being located on a first synchronization raster; and receive a physical downlink control channel (PDCCH), the physical downlink control channel (PDCCH) being used for scheduling a physical downlink shared channel (PDSCH) used for carrying remaining minimum system information / system information block 1 (RMSI / SIB1).

Description

Technical Field

[0001] The embodiments of this application relate to the field of wireless communication technology. Background Technology

[0002] In existing communication protocols (e.g., Rel-15NR), a global synchronization / frequency raster, or a synchronization raster (SS raster), is defined for the frequency range of 0–100 GHz. The synchronization raster characterizes the frequency position of the synchronization signal / physical broadcast channel block (SS / PBCH block) that a terminal device can use to obtain system-related information when it has not received explicit signaling indicating the position of the synchronization signal / physical broadcast channel block (SS / PBCH block) (or Synchronization Signal Block, SSblock, SSB). One frequency position corresponds to one Global Synchronization Channel Number (GSCN). Based on this, the value range of GSCN is defined for certain NR operating bands, that is, the corresponding available synchronization raster is defined.

[0003] Unlicensed frequency bands are an important component of spectrum resources, and many systems already support operation in unlicensed frequency bands, such as WiFi and Long Term Evolution (LTE) License Assisted Access (LAA). However, New Radio (NR) systems do not currently support operation in unlicensed frequency bands.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Summary of the Invention

[0005] In the time domain, an SSB can include 4 symbols; in the frequency domain, an SSB can include 240 subcarriers, or 20 RBs, with each RB including 12 subcarriers. Figure 1AThis is a schematic diagram of the time-frequency domain structure of a Synchronization Grid (SSB). From a frequency domain perspective, an SSB may or may not be located on a synchronization grating. If an SSB's subcarriers satisfy a predefined mapping relationship with a synchronization grating, then the SSB is located on that synchronization grating; conversely, if an SSB's subcarriers do not satisfy the predefined mapping relationship with a synchronization grating, then the SSB is not located on the synchronization grating. This predefined mapping relationship, for example, means that the synchronization grating corresponds to a specific subcarrier of the SSB, and this specific subcarrier is predefined. For example... Figure 1B As shown, this specific subcarrier is the 121st subcarrier of the SSB, or in other words, the 1st subcarrier of the 10th PRB of the SSB. Here, "predefined" refers to what is defined in the communication protocol.

[0006] The inventors of this application have discovered that in existing NR system designs, if an SSB is not located on a synchronization grating, since it is mainly used for measurement by the terminal equipment and not for cell selection or reselection, the terminal equipment does not need to receive SIB1 based on that SSB. However, the inventors of this application have further discovered that, with the further evolution of NR systems, it is necessary for the terminal equipment to receive SIB1 based on SSBs that are not located on synchronization gratings.

[0007] This application provides a signal transmission method, apparatus, and communication system. A first synchronization signal / physical broadcast channel block not located on a synchronization grating is associated with a control resource set. The control resource set is used to transmit a PDCCH. The PDCCH is used to schedule a physical downlink shared channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1). Thus, after receiving the PDCCH, the terminal device can obtain the PDSCH scheduled by the PDCCH and obtain the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1) carried in the PDSCH.

[0008] According to a first aspect of the embodiments of this application, a signal transmission method is provided, applied to a terminal device, the method comprising: receiving a first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB), wherein the first synchronization signal / physical broadcast channel block is not located on a first synchronization grating; and receiving a physical downlink control channel (PDCCH), wherein the physical downlink control channel (PDCCH) is used to schedule a physical downlink shared channel (PDSCH) for carrying the remaining minimum system information / system information block 1 (RMSI / SIB1).

[0009] According to a second aspect of the embodiments of this application, a signal transmission method is provided, applied to a network device, the method comprising: transmitting a first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB) not located on a first synchronization grating; and transmitting a physical downlink control channel (PDCCH), the physical downlink control channel (PDCCH) being used to schedule a physical downlink shared channel (PDSCH) for carrying the remaining minimum system information / system information block 1 (RMSI / SIB1).

[0010] According to a third aspect of the embodiments of this application, a signal transmission apparatus is provided, applied to a terminal device, the apparatus performing the signal transmission method of the first aspect of the embodiments of this application.

[0011] According to a fourth aspect of the present application, a signal transmission apparatus is provided, applied to a network device, the apparatus performing the signal transmission method of the second aspect of the present application.

[0012] According to a fifth aspect of the embodiments of this application, a terminal device is provided, which has a signal transmission device as described in the third aspect of the embodiments of this application.

[0013] According to a sixth aspect of the embodiments of this application, a network device is provided, which has the signal transmission means described in the fourth aspect of the embodiments of this application.

[0014] According to a seventh aspect of the embodiments of this application, a communication system is provided, which has the terminal device described in the sixth aspect of the embodiments of this application and the network device described in the seventh aspect.

[0015] According to an eighth aspect of the present application, a computer-readable program is provided, wherein when the program is executed in a signal transmission device or terminal device, the program causes the signal transmission device or terminal device to perform the signal transmission method of the first aspect of the present application.

[0016] According to a ninth aspect of the present application, a storage medium storing a computer-readable program is provided, wherein the computer-readable program causes a signal transmission device or terminal device to perform the signal transmission method described in the first aspect of the present application.

[0017] According to a tenth aspect of the present application, a computer-readable program is provided, wherein when the program is executed in a signal transmission device or network device, the program causes the signal transmission device or network device to perform the signal transmission method described in the second aspect of the present application.

[0018] According to an eleventh aspect of the present application, a storage medium storing a computer-readable program is provided, wherein the computer-readable program causes a signal transmission device or network device to perform the signal transmission method described in the second aspect of the present application.

[0019] The beneficial effect of the embodiments of this application is that: the first synchronization signal / physical broadcast channel block not located on the synchronization grating is associated with the control resource set, which is used to transmit the PDCCH. The PDCCH is used to schedule the physical downlink shared channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1). Thus, after receiving the PDCCH, the terminal device can obtain the PDSCH scheduled by the PDCCH and obtain the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1) carried in the PDSCH.

[0020] Specific embodiments of this application are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of this application can be adopted. It should be understood that the embodiments of this application are not limited in scope. Within the scope of the appended claims, embodiments of this application include many changes, modifications, and equivalents.

[0021] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0022] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0023] The elements and features described in one drawing or embodiment of this application may be combined with elements and features shown in one or more other drawings or embodiments. Furthermore, in the drawings, similar reference numerals denote corresponding parts in several drawings and can be used to indicate corresponding parts used in more than one embodiment.

[0024] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0025] Figure 1AThis is a schematic diagram of the SSB time-frequency domain structure;

[0026] Figure 1B This is a schematic diagram of the SSB located on the synchronization grating;

[0027] Figure 1C This is an example of subband division within a working frequency band;

[0028] Figure 1D This is a schematic diagram showing the positional relationship between the first synchronization grating and the sub-band;

[0029] Figure 2 This is a schematic diagram of a communication system according to an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of a signal transmission method according to the first aspect of an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the first and second synchronization gratings;

[0032] Figure 5 This is a schematic diagram showing the correspondence between the first SSB and the second synchronization grating;

[0033] Figure 6A This is a schematic diagram of the reference frequency location;

[0034] Figure 6B This is a schematic diagram illustrating the frequency domain location of the control resource set based on the CRB indication information;

[0035] Figure 7 This is a schematic diagram showing the correspondence between the physical resource block grid of the first SSB and the physical resource block grid of the control resource set;

[0036] Figure 8 This is a schematic diagram of a signal transmission method according to the second aspect of an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of a signal transmission apparatus according to a third aspect of an embodiment of this application;

[0038] Figure 10 This is a schematic diagram of a signal transmission apparatus according to a fourth aspect of an embodiment of this application;

[0039] Figure 11 This is a schematic block diagram of the system configuration of the terminal device according to the fifth aspect of the present application;

[0040] Figure 12 This is a schematic diagram of the configuration of a network device according to the sixth aspect of the embodiments of this application. Detailed Implementation

[0041] Referring to the accompanying drawings, the foregoing and other features of this application will become apparent from the following description. Specific embodiments of this application are specifically disclosed in the description and drawings, illustrating partial implementations in which the principles of this application can be adopted. It should be understood that this application is not limited to the described embodiments; rather, it includes all modifications, variations, and equivalents falling within the scope of the appended claims. Various embodiments of this application are described below with reference to the accompanying drawings. These embodiments are merely exemplary and not intended to limit the scope of this application.

[0042] In the embodiments of this application, the terms "first," "second," etc., are used to distinguish different elements by name, but do not indicate the spatial arrangement or chronological order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one or more of the terms listed in association and all combinations thereof. The terms "comprising," "including," "having," etc., refer to the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0043] In the embodiments of this application, the singular forms "a," "the," etc., including the plural forms, should be broadly understood as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms, unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0044] In the embodiments of this application, the term "communication network" or "wireless communication network" may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0045] Furthermore, communication between devices in a communication system can be carried out according to communication protocols at any stage, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR), and / or other currently known or future communication protocols.

[0046] In the embodiments of this application, the term "network device" refers, for example, to a device in a communication system that connects a terminal device to a communication network and provides services to that terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0047] The term "base station" can include, but is not limited to, NodeBs (or NBs), evolved NodeBs (or eNodeBs or eNBs), and 5G base stations (gNBs), etc. It can also include Remote Radio Heads (RRHs), Remote Radio Units (RRUs), relays, or low-power nodes (e.g., femto, pico, etc.). The term "base station" can encompass some or all of its functions, and each base station can provide communication coverage to a specific geographic area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0048] In the embodiments of this application, the terms "User Equipment" (UE) or "Terminal Equipment" (TE) refer, for example, to a device that accesses a communication network and receives network services through a network device. User equipment can be fixed or mobile, and may also be referred to as a mobile station (MS), terminal, subscriber station (SS), access terminal (AT), station, etc.

[0049] User equipment may include, but is not limited to, the following devices: cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, machine-type communication device, laptop computer, cordless phone, smartphone, smartwatch, digital camera, etc.

[0050] For example, in scenarios such as the Internet of Things (IoT), user devices can also be machines or devices used for monitoring or measurement, such as including but not limited to: machine-type communication (MTC) terminals, vehicle-mounted communication terminals, device-to-device (D2D) terminals, machine-to-machine (M2M) terminals, and so on.

[0051] The following examples illustrate the scenarios of embodiments of this application, but this application is not limited thereto.

[0052] Figure 2 This is a schematic diagram of a communication system according to an embodiment of this application, illustrating the case of a terminal device and a network device as examples. Figure 2 As shown, the communication system 200 may include a network device 201 and a terminal device 202 (for simplicity, Figure 2 (This explanation will use only one terminal device as an example.)

[0053] In this embodiment of the application, network device 201 and terminal device 202 can perform existing services or services that can be implemented in the future. For example, these services include, but are not limited to: enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0054] Terminal device 202 can send data to network device 201, for example, using unlicensed transmission. Network device 201 can receive data sent by one or more terminal devices 202 and send feedback information (e.g., ACK / NACK) to terminal devices 202. Based on the feedback information, terminal device 202 can confirm the end of the transmission process, or can initiate new data transmission, or can retransmit the data.

[0055] The following description uses a network device in a communication system as the receiver and a terminal device as the transmitter as an example. However, this application is not limited to this, and the transmitter and / or receiver can also be other devices. For example, this application is not only applicable to uplink unlicensed transmission between a network device and a terminal device, but also to sidelink unlicensed transmission between two terminal devices.

[0056] The corresponding English and Chinese names of the abbreviations used in this application are as follows:

[0057] CORESET Control resource set: Collection of control resources

[0058] CRB Common resource block: Common resource block

[0059] PRB (Physical Resource Block): A physical resource block (which can be interchanged / equivalent to RB in some cases).

[0060] RB resource block: resource block

[0061] RE Resource Element: Resource Element

[0062] BWP Bandwidth part: Bandwidth portion

[0063] DCI Downlink Control Information: Downlink control information

[0064] PDCCH (Physical Downlink Control Channel)

[0065] PDSCH (Physical Downlink Shared Channel)

[0066] PBCH (Physical Broadcast Channel)

[0067] DM-RS Demodulation reference signal:

[0068] PSS Primary synchronization signal:

[0069] SSS Secondary synchronization signal: Auxiliary synchronization signal

[0070] L1 Layer 1: Layer 1 (Physical Layer)

[0071] SSB Synchronization Signal Block, or SS / PBCH block: Synchronization signal block, or synchronization signal / physical broadcast channel block.

[0072] PLMN Public Land Mobile Network

[0073] SIB System Information Block: System Information Block

[0074] SIB1 (SIB1 is also referred to as Remaining Minimum System Information (RMSI): System Information Block 1, also known as Remaining Minimum System Information)

[0075] GSCN Global Synchronization Channel Number:

[0076] NR New Radio: New Radio

[0077] NR-ARFCN (NR Absolute Radio Frequency Channel Number): New Radio Interface - Absolute Radio Frequency Channel Number

[0078] SCS Sub-Carrier Spacing: Subcarrier Spacing

[0079] FR Frequency Range: Frequency range

[0080] A Cell-Defining SSB (CD-SSB) is an SSB associated with an RMSI.

[0081] CORESET#0: Control resource set. CORESET#0 is the control resource set used at least for SIB1 scheduling.

[0082] In various aspects of the embodiments of this application, "predetermined" or "preset" parameters may refer to parameters that are predefined or set in the communication protocol.

[0083] In various aspects of the embodiments of this application, the terms "know", "determine", and "judge" have similar meanings and can be substituted in some cases.

[0084] First aspect of the embodiment

[0085] The first aspect of this application relates to a signal transmission method applied to a terminal device, such as terminal device 202.

[0086] Figure 3 This is a schematic diagram of a signal transmission method according to the first aspect of an embodiment of this application, as shown below. Figure 3 As shown, the signal transmission method may include:

[0087] Operation 301: Receive the first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB), wherein the first synchronization signal / physical broadcast channel block is not located on the first synchronization grating; and

[0088] Operation 302: Receive the Physical Downlink Control Channel (PDCCH), which is used to schedule the Physical Downlink Shared Channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1).

[0089] According to a first aspect of the embodiments of this application, when a first synchronization signal / physical broadcast channel block not located on a first synchronization grating is received, a PDCCH is received. The PDCCH is used to schedule a physical downlink shared channel (PDSCH) for carrying the remaining minimum system information / system information block 1 (RMSI / SIB1). Thus, after receiving the PDCCH, the terminal device can obtain the PDSCH scheduled by the PDCCH and obtain the remaining minimum system information / system information block 1 (RMSI / SIB1) carried in the PDSCH.

[0090] As NR systems evolve further, in some scenarios, terminal devices need to receive SIB1 based on SSBs that are not located on the synchronization grating.

[0091] For example, an NR system might support operation in unlicensed frequency bands (NR_U). In unlicensed bands, multiple operators' networks might be deployed independently on the same channel, potentially leading to PCI confusion / collision between different operator networks. One possible solution is for network equipment to instruct terminal equipment to measure and report the cell's CGI-related information. This CGI-related information includes at least operator-related information, such as the Public Land Mobile Network ID (PLMN ID). A cell's CGI-related information is transmitted in SIB1. If a cell's SSB is not located on the synchronization grating, in order for the terminal equipment to obtain and report the cell's CGI-related information, the terminal equipment needs to receive the cell's SIB1 based on the SSB not located on the synchronization grating.

[0092] Since SIB1 is carried by PDSCH, and PDSCH is scheduled by PDCCH, in order for a terminal device to receive SIB1 in this cell, the terminal device needs to know the relevant information of the PDCCH used to schedule the PDSCH carrying SIB1, such as the control resource set used to send the PDCCH, in order to listen for and receive the PDCCH, and thus receive the PDSCH. Therefore, if the terminal device wants to receive SIB1 based on an SSB not located on the synchronization grating, the terminal device needs to know the aforementioned control resource set based on the SSB.

[0093] In the first aspect of this application, since Rel-15 only supports NR systems operating on licensed frequency bands, existing protocols for NR systems do not define corresponding available synchronization gratings for unlicensed frequency bands. Therefore, to support NR systems operating on unlicensed frequency bands, it is necessary to define corresponding available synchronization gratings for the unlicensed frequency bands. To reduce the complexity of receiving an SSB when the terminal device does not receive a display signal indicating the SSB location, a smaller number of available synchronization gratings can be defined. For ease of description, the available synchronization grating defined in the unlicensed frequency band will be referred to as the first synchronization grating. A working frequency band may include one or more sub-bands, with different sub-bands having the same or different bandwidths. For example, X (e.g., X = 1) first synchronization gratings are predefined in a sub-band. A first synchronization grating may have the same or different frequency position as a second synchronization grating described below. The interval between two adjacent first synchronization gratings is, for example, Y (Y is, for example, an integer multiple of 1.44) MHz.

[0094] Suppose an unlicensed operating frequency band (e.g., n46) corresponds to a frequency range of F1 (e.g., 5150) to F2 (e.g., 5925) MHz. Taking this operating frequency band as an example... Figure 1C This is an example of subband division within a working frequency band. Figure 1C In this system, multiple subbands have the same bandwidth, with one subband having a bandwidth of 20MHz.

[0095] Figure 1D This is a schematic diagram of the positional relationship between the first synchronization grating and the sub-band. One first synchronization grating 100 is predefined in a sub-band.

[0096] In Rel-15NR, the synchronization gratings (i.e., the second synchronization gratings) defined for the frequency range of 0–100 GHz are shown in Table 1. According to Table 1, within the frequency range corresponding to this operating frequency band, the interval between two adjacent second synchronization gratings is 1.44 MHz.

[0097] Table 1:

[0098]

[0099] Figure 4 This is a schematic diagram showing the positional relationship between the first and second synchronization gratings. Taking a sub-band with a frequency range of 5150–5170 MHz as an example, the frequency positions of the second synchronization grating in this sub-band and the corresponding GSCN are shown below. Figure 4 As shown, a first synchronization grating 401 is predefined in this sub-band. The frequency position of this first synchronization grating 401 is the same as the frequency position of the second synchronization grating corresponding to GSCN = 8996. That is, the second synchronization grating corresponding to GSCN = 8996 is the first synchronization grating in this sub-band.

[0100] In a first aspect of the embodiments of this application, the first synchronization signal / physical broadcast channel block (SSB) not being located on the first synchronization grating means that the first SSB subcarrier does not satisfy a predefined mapping relationship with the first synchronization grating. This predefined mapping relationship, for example, means that the first synchronization grating corresponds to a specific subcarrier of the first SSB, and this specific subcarrier is predefined.

[0101] In a first aspect of this application, the control resource set is used to transmit a control resource set for scheduling the PDCCH carrying RMSI / SIB1 (or, in other words, the control resource set is a control resource set of Type0-PDCCH CSS set). The control resource set is CORESET#0. The control resource set includes time-domain resources and frequency-domain resources. For example, the control resource set includes one or two symbols in the time domain; the control resource set includes 48 (in the case of a subcarrier spacing SCS of 30kHz) or 96 (in the case of a subcarrier spacing SCS of 15kHz) physical resource blocks in the frequency domain. Furthermore, the resources in the frequency domain of the control resource set can also be represented by subcarriers. The terminal device 202 needs to know at least the location of the frequency-domain resources of the control resource set in order to receive the PDCCH transmitted by the control resource set according to the frequency-domain resources.

[0102] In a first aspect of the embodiments of this application, the control resource set is associated with a first synchronization signal / physical broadcast channel block, and can be represented as follows:

[0103] In the first aspect of the embodiments of this application, as Figure 3 As shown, the method also includes:

[0104] In operation 303, before receiving the physical downlink control channel, the terminal device 202 determines the set of control resources for transmitting the physical downlink control channel based on the frequency domain position of the first synchronization signal / physical broadcast channel block and / or the indication information carried by the first synchronization signal / physical broadcast channel block.

[0105] In a first aspect of the embodiments of this application, the control resource set for transmitting the PDCCH for scheduling the PDCCH carrying RMSI / SIB1 is associated with a first synchronization signal / physical broadcast channel block, thereby enabling the terminal device 202 to determine the control resource set for transmitting the physical downlink control channel based on the first synchronization signal / physical broadcast channel block (SSB).

[0106] The following describes the implementation of operation 303 according to different implementation methods.

[0107] Implementation Method 1

[0108] Terminal device 202 determines the set of control resources for transmitting the physical downlink control channel based on the frequency domain position of the first synchronization signal / physical broadcast channel block.

[0109] The first implementation method will now be described.

[0110] In at least one embodiment, the frequency domain positional relationship between the control resource set and the first SSB is predefined. For example, the relative position or offset of a predetermined resource (i.e., a predefined resource) in the frequency domain resources of the control resource set (CORESET) and a predetermined resource (i.e., a predefined resource) in the frequency domain resources of the first synchronization signal / physical broadcast channel block is a first predetermined value (i.e., a predefined value). Thus, the terminal device can determine the frequency domain position of the predetermined resource in the frequency domain resources of the control resource set (CORESET) based on the frequency domain position of the first synchronization signal / physical broadcast channel block and this first predetermined value.

[0111] The predetermined resource in the frequency domain resources of the control resource set can be the nth resource block or subcarrier in the control resource set, where n is a natural number, for example, the first subcarrier in the control resource set. The predetermined resource in the frequency domain resources of the first synchronization signal / physical broadcast channel block can be the kth resource block or subcarrier in the first SSB, where k is a natural number, for example, the first subcarrier in the first SSB. In at least another embodiment, the frequency domain position of the control resource set in a subband is predefined, and the positional relationship between the subband where the control resource set is located and the subband where the first SSB is located is predefined. Therefore, the terminal device can determine the subband where the control resource set is located based on the subband where the first SSB is located, and since the frequency domain position of the control resource set in a subband is predefined, the terminal device can further determine the frequency domain position of the control resource set within the determined subband.

[0112] The subband containing the first SSB is either the frequency domain resource of the first SSB or a predetermined resource within the frequency domain resource of the first SSB. This predetermined resource is, for example, the s-th resource block or subcarrier in the first SSB, where s is a natural number, such as the middle subcarrier (i.e., the 121st subcarrier) or the first subcarrier of PRB 10. The relative position or offset between the subband containing the control resource set and the subband containing the first SSB is a second predetermined value (i.e., a predefined value). For example, this second predetermined value can be equal to 0, meaning the subband containing the control resource set is the same as the subband containing the first SSB. The frequency domain position of the control resource set within a subband can be predefined as follows: a frequency domain position related to the frequency domain position of the first synchronization grating in the subband, for example, the related frequency domain position can be a frequency domain position obtained by adding or subtracting a predetermined value from the frequency domain position of the first synchronization grating; or, a frequency domain position related to the frequency domain resources of the second SSB on the first synchronization grating in the subband, wherein the second SSB is located on the first synchronization grating in the subband, for example, the related frequency domain position can be a frequency domain position obtained by adding or subtracting a predetermined value from the frequency domain resources of the second SSB.

[0113] Implementation Method 2

[0114] Terminal device 202 determines the set of control resources used to transmit the physical downlink control channel based on the indication information carried by the first synchronization signal / physical broadcast channel block.

[0115] The second implementation method will now be described.

[0116] In the second implementation, the indication information is used to indicate the frequency domain location of the control resource set (e.g., CORESET#0).

[0117] The indication information can be carried in the first synchronization signal / physical broadcast channel block, for example, in the primary synchronization signal (PSS), and / or secondary synchronization signal (SSS), and / or physical broadcast channel (PBCH), and / or physical broadcast channel demodulation reference signal (PBCHDMRS) carried in the first synchronization signal / physical broadcast channel block.

[0118] In various embodiments of Implementation 2, the indication information may indicate the sub-band and / or frequency location.

[0119] In a specific implementation, the indication information may indicate: the subband where a first predetermined resource in the frequency domain of the control resource set (CORESET) is located; and / or, the frequency domain location of a second predetermined resource in the frequency domain of the control resource set (CORESET). The first predetermined resource can be represented by a resource block or a subcarrier, and the second predetermined resource can also be represented by a resource block or a subcarrier. The first and second predetermined resources may be the same or different.

[0120] In at least one embodiment, when the indication information indicates a sub-band, the terminal device can determine the sub-band where the frequency domain resources of the control resource set (CORESET) are located based on the indication information. Thus, the terminal device can determine the frequency domain resources of the control resource set (CORESET) by combining the frequency domain positions of the frequency domain resources within a sub-band. For example, the frequency domain position of a first predetermined resource of the control resource set within its sub-band may be a preset position (i.e., the frequency domain position is pre-set), or it may be a frequency domain position indicated by the indication information.

[0121] In at least one embodiment, when the indication information indicates a subband, the indication information may indicate the index of the subband in which the first predetermined resource in the control resource set (CORESET) is located, for example, the index of the subband may be represented as a numerical value.

[0122] In at least one embodiment, when the indication information indicates a channel, the indication information may also indicate the relative position of the frequency domain resources of the control resource set (CORESET) or the subband where the first predetermined resource in the control resource set (CORESET) is located and the channel where the frequency domain position of the first synchronization signal / physical broadcast channel block (SSB) is located. The frequency domain position of the first synchronization signal / physical broadcast channel block (SSB) may be as described in Embodiment 1, for example, the frequency domain position of the k-th resource block or subcarrier in the first SSB, where k is a natural number.

[0123] In at least one embodiment, when the indication information indicates a subband, the indication information may indicate information related to the synchronization grating in the channel of a frequency domain resource of a control resource set (CORESET) or a first predetermined resource in the control resource set (CORESET).

[0124] For example, the indication information may indicate the offset between the Global Synchronization Channel Number (GSCN) of the second synchronization grating in the channel where the frequency domain resource in the control resource set (CORESET) or the first predetermined resource is located and the Global Synchronization Channel Number (GSCN) of the second synchronization grating corresponding to the first synchronization signal / physical broadcast channel block.

[0125] Figure 5 This is a schematic diagram illustrating the correspondence between the first SSB and the second synchronization grating. For example... Figure 5 As shown, the first SSB is not transmitted to the first synchronization grating 500. However, the first subcarrier of the resource block 10 of the first SSB has the same frequency as the second synchronization grating 501. That is, the first SSB is located in the second synchronization grating 501. Therefore, the second synchronization grating 501 is the second synchronization grating corresponding to the first SSB. The subband 502 where the first predetermined resource of the control resource set (e.g., resource block 0) is located has the second synchronization grating 503.

[0126] The terminal device can obtain the GSCN of the second synchronization grating 503 based on the GSCN of the second synchronization grating 501 and the aforementioned offset value. Based on the GSCN of the second synchronization grating 503, the frequency position of the second synchronization grating 503 can be determined. Since the frequency range of the sub-band is preset, the terminal device can determine the sub-band 502 where the second synchronization grating 503 is located based on its frequency position. Channel 502 is the sub-band where the first predetermined resource of the control resource set is located.

[0127] In at least one embodiment, when the indication information indicates a frequency location, the terminal device can determine the frequency domain location of the second predetermined resource in the control resource set (CORESET) based on the indication information.

[0128] For example, the indication information can indicate the relative position of the frequency domain position of a second predetermined resource in the control resource set (CORESET) to the reference frequency position.

[0129] The reference frequency location can be a predefined frequency location or a frequency location indicated by the network device 201 to the terminal device 202.

[0130] In at least one embodiment, the reference frequency position may be the frequency domain position of the third predetermined resource of the first SSB. For example, the third predetermined resource is the m-th resource block or subcarrier in the frequency domain resources of the first SSB, and the frequency domain position of the third predetermined resource is the frequency domain position of the third predetermined resource, where m is a natural number.

[0131] In at least one embodiment, the reference frequency location may also be the frequency domain location of the fourth predetermined resource of the second SSB. For example, the fourth predetermined resource may be the Lth resource block or subcarrier in the frequency domain resources of the second SSB, where L is a natural number. In one specific embodiment, the frequency domain location of the fourth predetermined resource of the second SSB is a predefined frequency domain location, or the frequency domain location of the fourth predetermined resource of the second SSB may be indicated by the network device 201, for example, through indication information.

[0132] In at least one embodiment, the reference frequency position may also be the frequency position of the first synchronization grating in the subband containing the frequency domain resources of the control resource set (CORESET) (all frequency domain resources are within one channel) or the second predetermined resource in the frequency domain resources of the control resource set. In one specific embodiment, the frequency position of the first synchronization grating in the subband may be a predefined frequency position, or the frequency position of the first synchronization grating in the subband may be indicated by the network device 201, for example, through indication information.

[0133] Figure 6A This is a schematic diagram of the reference frequency location. For example... Figure 6A As shown, reference frequency position 601 can be the first resource block (e.g., resource block 0) in the first SSB or the frequency domain position of a subcarrier. Reference frequency position 602 is the first resource block (e.g., resource block 0) in the second SSB or the frequency domain position of a subcarrier. Reference frequency position 603 is the frequency position of the first resource block (e.g., resource block 0) in the frequency domain resources of the control resource set (CORESET) or the first synchronization grating 604 in the channel 600 where the subcarrier is located.

[0134] exist Figure 6A In this context, the reference frequency position can be one of 601, 602, or 603. The indication information can indicate the relative position of the frequency domain position of the second predetermined resource in the control resource set (CORESET) to the reference frequency position. For example, if the reference frequency position is 602, the indication information T can indicate the relative position between the reference frequency position 602 and the frequency domain position 605 of the second predetermined resource in the control resource set (CORESET) (e.g., the frequency domain position of the first resource block or subcarrier).

[0135] In at least one embodiment, the relative position indicated by the indication information includes the relative position at the RB-level and / or the relative position at the subcarrier-level, such as the number of resource blocks and / or the number of subcarriers. For example, the relative position may be K1 resource blocks, K2 subcarriers, or K3 resource blocks plus K4 subcarriers.

[0136] In one specific implementation, the indication information may be based on the frequency domain location of the control resource set indicated by the CRB. Figure 6B This is a schematic diagram illustrating the frequency domain location of the control resource set based on the CRB indication information. For example... Figure 6BAs shown, this indication information indicates the offset between the RB index corresponding to the first RB in the control resource set and the RB index corresponding to the first CRB that overlaps with the first RB of the second SSB, that is, the relative position of the RB-level, for example... Figure 6A The offset_1 in the value; and / or, this indication information indicates the offset between the first subcarrier of the first CRB overlapping with the first RB of the second SSB and the first subcarrier of the second SSB, i.e., the relative position of the subcarrier level, for example, Figure 6A offset_2.

[0137] On the other hand, this indication information can be included in the PBCH MIB. To minimize modifications to existing communication protocols and thus reduce product manufacturing cycles and costs, this indication information may correspond, for example, to the bits corresponding to controlResourceSetZero and / or subCarrierSpacingCommon in the Rel-15NR MIB. That is, controlResourceSetZero and / or subCarrierSpacingCommon and / or ssb-SubcarrierOffset are multiplexed to indicate the aforementioned relative positions. For example, controlResourceSetZero and / or subCarrierSpacingCommon are multiplexed to indicate the relative position of the RB-level, and ssb-SubcarrierOffset is multiplexed to indicate the relative position of the subcarrier-level.

[0138] In the second embodiment, the indication information can also indicate both the sub-band and the frequency domain position. For example, at least one bit in the indication information is used to indicate the channel, and another at least one bit in the indication information is used to indicate the frequency domain position. The manner in which the channel and the frequency domain position are indicated can be as described above. Alternatively, multiple combinations of channel and frequency domain position can be preset, and the indication information can indicate one of these combinations, thereby jointly indicating the sub-band and the frequency domain position.

[0139] In this application, Embodiment 1 and Embodiment 2 can be combined. That is, some parameters used to determine the frequency domain resources of the control resource set can be determined based on the frequency domain position of the first SSB, and another part of the parameters can be determined based on the indication information. In addition, the remaining parameters can be predefined by the communication protocol. For example, the terminal device 202 determines the sub-band where the frequency domain resources of the control resource set are located based on the frequency domain position of the first SSB, and obtains the frequency domain position of the control resource set indicated by the reference frequency domain position based on the indication information. Here, the reference frequency domain position is predefined as the first synchronization grating of the sub-band where the control resource set is located.

[0140] In Embodiments 1 and 2, the frequency domain positions of each physical resource block of the first SSB and the frequency domain positions of each physical resource block in the control resource set (CORESET) can have a fixed mapping relationship. For example, in the frequency domain, the physical resource block grid (PRB grid) of the first SSB and the physical resource block grid (PRB grid) of the control resource set are consistent or have a fixed offset. The network device 201 needs to transmit the first SSB and the control resource set (CORESET) using the aforementioned fixed mapping relationship.

[0141] Figure 7 This is a schematic diagram illustrating the correspondence between the physical resource block grid of the first SSB and the physical resource block grid of the control resource set. For example... Figure 7 As shown, in the physical resource block grid (PRB grid) of the first SSB, the starting frequency 701 of physical resource block 10 has a fixed offset 703 between it and the starting frequency 702 of the physical resource block grid (PRB grid) that controls the resource set.

[0142] Furthermore, this embodiment may not be limited to this; for example, in Figure 7 In this context, the starting frequency 701 of the physical resource block 10 can be the same as the starting frequency 702 of the physical resource block grid (PRB grid) of the control resource set, that is, the physical resource block grid (PRB grid) of the first SSB can be consistent with the physical resource block grid (PRB grid) of the control resource set.

[0143] Therefore, upon receiving a first SSB, the terminal device can determine the physical resource block grid (PRB grid) of the control resource set associated with the first SSB based on the PRB grid of the first SSB, and obtain the frequency domain resources of the control resource set by combining it with other information. This other information may include, for example, the channel containing the starting frequency of a predetermined resource in the control resource set, and the relative position of the frequency domain location of a second predetermined resource in the control resource set to a reference frequency location. This other information may be pre-set or obtained through the aforementioned indication information.

[0144] In a first aspect of this application embodiment, before the terminal device receives the first SSB, the network device can indicate the frequency domain location of the first SSB and / or the PCI corresponding to the first SSB through a measurement configuration, and the network device receives the first SSB according to the measurement configuration. Furthermore, the measurement configuration can instruct the terminal device to report CGI-related information of the cell corresponding to the PCI, and after receiving the SIB1 of the cell, report the CGI-related information of the cell.

[0145] According to a first aspect of the embodiments of this application, when a first synchronization signal / physical broadcast channel block transmitted on a non-first synchronization grating is received, a PDCCH is received. The PDCCH is used to schedule a physical downlink shared channel (PDSCH) for carrying the remaining minimum system information / system information block 1 (RMSI / SIB1). Thus, after receiving the PDCCH, the terminal device can obtain the PDSCH scheduled by the PDCCH and obtain the remaining minimum system information / system information block 1 (RMSI / SIB1) carried in the PDSCH.

[0146] Second aspect of the embodiments

[0147] The second aspect of this application relates to a signal transmission method applied to a network device, such as network device 201.

[0148] Figure 8 This is a schematic diagram of a signal transmission method according to the second aspect of an embodiment of this application, as shown below. Figure 8 As shown, the signal transmission method may include:

[0149] Operation 801: Transmit the first synchronization signal / physical broadcast channel block (SS / PBCHblock, SSB) that is not located on the first synchronization grating; and

[0150] Operation 802: Send the Physical Downlink Control Channel (PDCCH), which is used to schedule the Physical Downlink Shared Channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1).

[0151] In a second aspect of the embodiments of this application, in operation 802, network device 201 transmits the physical downlink control channel (PDCCH) on resources of the control resource set (CORESET) associated with the first synchronization signal / physical broadcast channel block.

[0152] like Figure 8 As shown, the method also includes:

[0153] In operation 803, network device 201 sends a measurement configuration to terminal device 202 so that terminal device 202 can obtain the frequency domain location of the first synchronization signal / physical broadcast channel block according to the measurement configuration.

[0154] In a second aspect of the embodiments of this application, the relative position of the frequency domain position of a predetermined resource in the frequency domain resources of the control resource set (CORESET) to the frequency domain position of the first synchronization signal / physical broadcast channel block is a first predetermined value.

[0155] In at least one embodiment, the relative position between the subband where the frequency domain resources of the control resource set (CORESET) are located and the subband where the frequency domain position of the first synchronization signal / physical broadcast channel block is located is a second predetermined value, wherein the frequency domain resources of the control resource set (CORESET) are located within the same subband, and the predetermined resources of the control resource set (CORESET) are located at a predetermined position within the subband.

[0156] In at least one embodiment, the first synchronization signal / physical broadcast channel block may carry indication information that can be used to indicate the frequency domain location of the control resource set.

[0157] For example, the indication information may indicate: the subband where a first predetermined resource in the frequency domain of the control resource set (CORESET) is located; and / or, the frequency domain location of a second predetermined resource in the frequency domain of the control resource set (CORESET) within the subband. The first predetermined resource and the second predetermined resource may be the same or different.

[0158] When indicating a subband, the indication information may indicate the index of the subband containing the frequency domain resources of the control resource set (CORESET) or the first predetermined resource in the control resource set (CORESET).

[0159] When indicating a subband, the indication information may also indicate the relative position of the subband containing the frequency domain resources of the control resource set (CORESET) or the first predetermined resource in the control resource set (CORESET) and the subband containing the first synchronization signal / physical broadcast channel block.

[0160] When indicating a subband, the indication information may also indicate information related to the synchronization grating corresponding to the subband containing the frequency domain resources of the control resource set (CORESET) or the first predetermined resource in the control resource set (CORESET). For example, the indication information indicates the offset between the Global Synchronization Channel Number (GSCN) of the second synchronization grating in the subband containing the frequency domain resources of the control resource set (CORESET) or the first predetermined resource in the control resource set (CORESET) and the Global Synchronization Channel Number (GSCN) of the second synchronization grating corresponding to the first synchronization signal / physical broadcast channel block.

[0161] When the indication information indicates a frequency domain position, the indication information indicates the relative position of the frequency domain position of the second predetermined resource in the control resource set (CORESET) to the reference frequency position.

[0162] In at least one embodiment, the relative position is the number of resource blocks and / or the number of subcarriers.

[0163] In at least one embodiment, the reference frequency position is the frequency domain position of the third predetermined resource of the first SSB, or the frequency domain position of the fourth predetermined resource of the second SSB, or the frequency position of the first synchronization grating in the subband where the second predetermined resource of the frequency domain resource of the control resource set (CORESET) is located.

[0164] In at least one embodiment, the reference frequency location may be a pre-set frequency location or a frequency location indicated by the network device 201.

[0165] In at least one embodiment, the frequency domain positions of each physical resource block of the first SSB sent by the network device 201 and the frequency domain positions of each physical resource block in the control resource set (CORESET) may have a fixed mapping relationship.

[0166] According to a second aspect of the embodiments of this application, when a first synchronization signal / physical broadcast channel block is transmitted on a non-first synchronization grating, the network device transmits a PDCCH on the control resource set associated with the first SSB. The PDCCH is used to schedule a physical downlink shared channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1). Thus, after receiving the PDCCH, the terminal device can obtain the PDSCH scheduled by the PDCCH and obtain the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1) carried in the PDSCH.

[0167] Third aspect of the embodiments

[0168] A third aspect of this application provides a signal transmission apparatus applied to a terminal device, such as terminal device 202. This signal transmission apparatus is used to implement the signal transmission method described in the first aspect of the embodiments.

[0169] Figure 9 This is a schematic diagram of a signal transmission apparatus according to a third aspect of this application, as shown below. Figure 9 As shown, the signal transmission device 900 includes a first transmission unit 901.

[0170] The first transmission unit 901 can implement the signal transmission method described in the first aspect of the embodiments of this application. For a description of the signal transmission method implemented by the first transmission unit 901, please refer to the description of the signal transmission method in the first aspect of the embodiments of this application.

[0171] Fourth aspect of the embodiments

[0172] A fourth aspect of this application provides a signal transmission apparatus applied to a network device, such as network device 201. This signal transmission apparatus is used to implement the signal transmission method described in the second aspect of the embodiments.

[0173] Figure 10 This is a schematic diagram of a signal transmission apparatus according to a fourth aspect of an embodiment of this application, as shown below. Figure 10 As shown, the signal transmission device 1000 includes a second transmission unit 1001.

[0174] The second transmission unit 1001 can implement the signal transmission method described in the second aspect of the embodiments of this application. For a description of the signal transmission method implemented by the second transmission unit 1001, please refer to the description of the signal transmission method in the second aspect of the embodiments of this application.

[0175] Fifth aspect of the embodiments

[0176] A fifth aspect of this application provides a terminal device that includes a signal transmission device 900 as described in the third aspect of the embodiments.

[0177] Figure 11 This is a schematic block diagram of the system configuration of the terminal device 1100 according to the fifth aspect of this application. Figure 11 As shown, the terminal device 1100 may include a processor 1110 and a memory 1111; the memory 1111 is coupled to the processor 1110. It is worth noting that this figure is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunications functions or other functions.

[0178] In one embodiment, the function of the signal transmission device 900 can be integrated into the processor 1110. The processor 1110 can be configured to implement the signal transmission method of the first aspect of the embodiment.

[0179] In another embodiment, the signal transmission device 900 can be configured separately from the processor 1110. For example, the signal transmission device 900 can be configured as a chip connected to the processor 1110, and the function of the signal transmission device 900 can be realized through the control of the processor 1110.

[0180] like Figure 11 As shown, the terminal device 1100 may also include: a communication module 1130, an input unit 1140, a display 1150, and a power supply 1160. It is worth noting that the terminal device 1100 is not necessarily required to include these components. Figure 11 All components shown; in addition, terminal device 1100 may also include Figure 11 For components not shown, please refer to existing technologies.

[0181] like Figure 11 As shown, processor 1110, sometimes also referred to as controller or operation control, may include a microprocessor or other processor device and / or logic device, which receives input and controls the operation of various components of terminal device 1100.

[0182] The memory 1120 may be, for example, one or more of a cache, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable devices. It can store various types of data, and also stores programs for executing related information. The processor 1110 can execute the program stored in the memory 1120 to perform information storage or processing, etc. The functions of other components are similar to those in existing systems and will not be described further here. The components of the terminal device 1100 can be implemented using dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of this application.

[0183] Sixth aspect of the embodiments

[0184] A sixth aspect of this application provides a network device that includes a signal transmission means 1000 as described in the fourth aspect of the embodiments.

[0185] Figure 12 This is a schematic diagram illustrating the configuration of a network device according to an embodiment of this application. Figure 12As shown, the network device 1200 may include a processor 1210 and a memory 1220; the memory 1220 is coupled to the processor 1210. The memory 1220 can store various types of data; it also stores an information processing program 1230, which is executed under the control of the processor 1210 to receive various information sent by user equipment and to send request information to user equipment.

[0186] In one embodiment, the function of the signal transmission device 1000 can be integrated into the processor 1210. The processor 1210 can be configured to implement the signal transmission method described in the second aspect of the embodiments of this application.

[0187] In another embodiment, the signal transmission device 1000 can be configured separately from the processor 1210. For example, the signal transmission device 1000 can be configured as a chip connected to the processor 1210, and the function of the signal transmission device 1000 can be realized through the control of the processor 1210.

[0188] In addition, such as Figure 12 As shown, network device 1200 may also include: transceiver 1240 and antenna 1250, etc.; the functions of the above components are similar to those in the prior art, and will not be described in detail here. It is worth noting that network device 1200 is not necessarily required to include... Figure 12 All components shown; in addition, network device 1200 may also include Figure 12 For components not shown, please refer to existing technologies.

[0189] Seventh aspect of the embodiments

[0190] A seventh aspect of this application also provides a communication system, including a network device as described in the sixth aspect of the embodiments and a terminal device as described in the fifth aspect of the embodiments.

[0191] The apparatus and methods described above in this application can be implemented in hardware or in combination with software. This application relates to a computer-readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to implement the various methods or steps described above. This application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, etc.

[0192] The methods / apparatus described in conjunction with the embodiments of this application can be directly embodied in hardware, software modules executed by a processor, or a combination of both. For example, one or more and / or combinations of one or more functional block diagrams shown in the figures can correspond to various software modules in a computer program flow, or to various hardware modules. These software modules can correspond to the various steps shown in the figures, respectively. These hardware modules can be implemented, for example, using a field-programmable gate array (FPGA) to embed these software modules.

[0193] The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor, enabling the processor to read information from and write information to the storage medium; or the storage medium can be an integral part of the processor. The processor and storage medium can reside in an ASIC. The software module can be stored in the memory of a mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a high-capacity MEGA-SIM card or a high-capacity flash memory device, the software module can be stored in the MEGA-SIM card or the high-capacity flash memory device.

[0194] One or more and / or one or more combinations of functional blocks described in the accompanying drawings can be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof for performing the functions described herein. One or more and / or one or more combinations of functional blocks described in the accompanying drawings can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0195] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on its spirit and principles, and these modifications and variations are also within the scope of the present application.

[0196] Regarding the implementation methods including the above embodiments, the following notes are also disclosed:

[0197] 1. A signal transmission method, applied to a terminal device, the method comprising:

[0198] Receive the first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB), wherein the first synchronization signal / physical broadcast channel block is not located on the first synchronization grating; and

[0199] Receive the Physical Downlink Control Channel (PDCCH), which is used to schedule the Physical Downlink Shared Channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1).

[0200] 2. The method as described in Appendix 1, wherein the method further comprises:

[0201] Before receiving the physical downlink control channel, the terminal device determines the set of control resources for transmitting the physical downlink control channel based on the frequency domain position of the first synchronization signal / physical broadcast channel block and / or the indication information carried by the first synchronization signal / physical broadcast channel block.

[0202] 3. The method as described in Appendix 2, wherein,

[0203] The relationship between the control resource set and the frequency domain position of the first SSB is predefined.

[0204] 4. The method as described in Appendix 2 or 3, wherein the relative position of the frequency domain position of the predetermined resource in the frequency domain resources of the control resource set (CORESET) to the frequency domain position of the first synchronization signal / physical broadcast channel block is a first predetermined value.

[0205] 5. The method as described in Appendix 2 or 3, wherein,

[0206] The relative position between the subband where the frequency domain resources of the control resource set (CORESET) are located and the subband where the frequency domain position of the first synchronization signal / physical broadcast channel block is located is a second predetermined value.

[0207] The frequency domain resources of the control resource set (CORESET) are located in the same sub-band, and the predetermined resources of the control resource set (CORESET) are located at predetermined positions within the sub-band.

[0208] 6. The method as described in Appendix 5, wherein,

[0209] Within different subbands, the predetermined positions of the predetermined resources in the control resource set (CORESET) may be the same or different.

[0210] 7. The method as described in Appendix 5 or 6, wherein,

[0211] Within the same subband, for different subcarrier intervals, the predetermined positions of the predetermined resources in the control resource set (CORESET) may be the same or different.

[0212] 8. The method as described in Appendix 2, wherein,

[0213] The indication information is used to indicate the frequency domain location of the control resource set.

[0214] 8a. The method according to Appendix 2, wherein,

[0215] The indication information indicates the frequency domain location of the control resource set based on the reference frequency domain location.

[0216] 9. According to the method described in Appendix 8, wherein,

[0217] The instruction information indicates that:

[0218] The frequency domain resources of the control resource set (CORESET) or the subband containing the first predetermined resource in the frequency domain resources of the control resource set; and / or

[0219] The frequency domain position of the frequency domain resources of the control resource set (CORESET) or the second predetermined resource in the frequency domain resources of the control resource set (CORESET).

[0220] The first predetermined resource and the second predetermined resource may be the same or different.

[0221] 10. The method as described in Appendix 9, wherein,

[0222] The indication information indicates the index of the frequency domain resource of the control resource set (CORESET) or the subband where the first predetermined resource in the control resource set (CORESET) is located; or

[0223] The indication information indicates the relative position of the frequency domain resources of the control resource set (CORESET) or the sub-band containing the first predetermined resource in the control resource set (CORESET) and the sub-band containing the frequency domain position of the first synchronization signal / physical broadcast channel block; or

[0224] The indication information indicates information related to the synchronization grating in the subband where the frequency domain resources of the control resource set (CORESET) or the first predetermined resource in the control resource set (CORESET) are located.

[0225] 11. The method as described in Appendix 10, wherein,

[0226] The indication information indicates the offset between the Global Synchronization Channel Number (GSCN) of the second synchronization grating in the frequency domain resource of the control resource set (CORESET) or the subband where the first predetermined resource is located and the Global Synchronization Channel Number (GSCN) of the second synchronization grating corresponding to the first synchronization signal / physical broadcast channel block.

[0227] 12. The method as described in Appendix 9, wherein,

[0228] The indication information indicates the relative position of the frequency domain position of the second predetermined resource in the control resource set (CORESET) to the reference frequency position.

[0229] 13. The method as described in Appendix 12, wherein,

[0230] The reference frequency location is predefined or indicated by the network device.

[0231] 14. The method as described in Appendix 13, wherein,

[0232] The reference frequency position is the frequency domain position of the third predetermined resource of the first SSB, or the frequency domain position of the fourth predetermined resource of the second SSB, or the frequency position of the first synchronization grating in the subband where the frequency domain resource of the control resource set (CORESET) or the second predetermined resource in the frequency domain resource of the control resource set is located.

[0233] 15. The method as described in Appendix 12, wherein,

[0234] The relative position refers to the number of resource blocks and / or the number of subcarriers.

[0235] 16. The method as described in Appendix 2, wherein,

[0236] The frequency domain position of each physical resource block in the first SSB has a fixed mapping relationship with the frequency domain position of each physical resource block in the control resource set (CORESET).

[0237] 17. A signal transmission method applied to a network device, the method comprising:

[0238] Transmit the first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB) that is not located on the first synchronization grating; and

[0239] Transmit the Physical Downlink Control Channel (PDCCH), which is used to schedule the Physical Downlink Shared Channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1).

[0240] 18. The method as described in Appendix 17, wherein,

[0241] The physical downlink control channel (PDCCH) is transmitted on the resources of the control resource set (CORESET) associated with the first synchronization signal / physical broadcast channel block.

[0242] 19. The method as described in Appendix 18, wherein the method further comprises:

[0243] The network device sends a measurement configuration to the terminal device, the measurement configuration instructing the terminal device to obtain the frequency domain location of the first synchronization signal / physical broadcast channel block.

[0244] 20. The method as described in Appendix 18, wherein,

[0245] The relative position of the frequency domain position of the predetermined resource in the frequency domain resources of the control resource set (CORESET) to the frequency domain position of the first synchronization signal / physical broadcast channel block is a first predetermined value.

[0246] 21. The method as described in Appendix 18, wherein,

[0247] The relative position between the subband where the frequency domain resources of the control resource set (CORESET) are located and the subband where the frequency domain position of the first synchronization signal / physical broadcast channel block is located is a second predetermined value.

[0248] The frequency domain resources of the control resource set (CORESET) are located in the same sub-band, and the predetermined resources of the control resource set (CORESET) are located at predetermined positions within the sub-band.

[0249] 22. The method as described in Appendix 21, wherein,

[0250] Within different subbands, the predetermined positions of the predetermined resources in the control resource set (CORESET) may be the same or different.

[0251] 23. The method as described in Appendix 21 or 22, wherein,

[0252] Within the same subband, for different subcarrier intervals, the predetermined positions of the predetermined resources in the control resource set (CORESET) may be the same or different.

[0253] 24. The method as described in Appendix 18, wherein,

[0254] The first synchronization signal / physical broadcast channel block carries indication information, which is used to indicate the frequency domain location of the control resource set.

[0255] 25. The method as described in Appendix 18, wherein,

[0256] The instruction information indicates that:

[0257] The frequency domain resources of the control resource set (CORESET) or the subband containing the first predetermined resource in the frequency domain resources of the control resource set; and / or

[0258] The frequency domain position of the frequency domain resources of the control resource set (CORESET) or the second predetermined resource in the control resource set (CORESET) in the sub-band.

[0259] The first predetermined resource and the second predetermined resource may be the same or different.

[0260] 26. The method as described in Appendix 25, wherein,

[0261] The indication information indicates the index of the frequency domain resource of the control resource set (CORESET) or the subband where the first predetermined resource in the control resource set (CORESET) is located; or

[0262] The indication information indicates the relative position of the frequency domain resources of the control resource set (CORESET) or the sub-band containing the first predetermined resource in the control resource set (CORESET) and the sub-band containing the first synchronization signal / physical broadcast channel block; or

[0263] The indication information indicates information related to the synchronization grating of the frequency domain resources of the control resource set (CORESET) or the subband where the first predetermined resource in the control resource set (CORESET) is located.

[0264] 27. The method as described in Appendix 26, wherein,

[0265] The indication information indicates the offset between the Global Synchronization Channel Number (GSCN) of the second synchronization grating in the frequency domain resource of the control resource set (CORESET) or the subband where the first predetermined resource in the control resource set (CORESET) is located and the Global Synchronization Channel Number (GSCN) of the second synchronization grating corresponding to the first synchronization signal / physical broadcast channel block.

[0266] 28. The method as described in Appendix 25, wherein,

[0267] The indication information indicates the relative position of the frequency domain position of the second predetermined resource in the control resource set (CORESET) to the reference frequency position.

[0268] 29. The method as described in Appendix 28, wherein the method further comprises:

[0269] The network device indicates the reference frequency position.

[0270] 30. The method as described in Appendix 29, wherein,

[0271] The reference frequency position is the frequency domain position of the third predetermined resource of the first SSB, or the frequency domain position of the fourth predetermined resource of the second SSB, or the frequency position of the first synchronization grating in the subband where the frequency domain resource of the control resource set (CORESET) or the second predetermined resource in the frequency domain resource of the control resource set is located.

[0272] 31. The method as described in Appendix 28, wherein,

[0273] The relative position refers to the number of resource blocks and / or the number of subcarriers.

[0274] 32. The method as described in Appendix 18, wherein,

[0275] The frequency domain positions of each physical resource block of the first SSB sent by the network device have a fixed mapping relationship with the frequency domain positions of each physical resource block in the control resource set (CORESET).

Claims

1. A signal receiving device, applied to a terminal device, the device comprising a first receiving unit configured to: Receive the first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB), wherein the first synchronization signal / physical broadcast channel block is not located on the first synchronization grating; and The Physical Downlink Control Channel (PDCCH) is received, which is used to schedule the Physical Downlink Shared Channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1). The first receiving unit is further configured to: The control resource set for receiving the physical downlink control channel is determined based on the relative position of the frequency domain position of the second predetermined resource in the control resource set (CORESET) to the reference frequency domain position. The reference frequency domain position is the frequency domain position of the fourth predetermined resource of the second SSB, and the second SSB is located on the first synchronization grating.

2. The apparatus of claim 1, wherein, The relative position is indicated by indication information carried by the first synchronization signal / physical broadcast channel block (SSB).

3. The apparatus of claim 2, wherein, The relationship between the control resource set and the frequency domain position of the first SSB is predefined; or The first synchronization signal / physical broadcast channel block is located in the same subband as the control resource set (CORESET).

4. The apparatus of claim 2, wherein, The indication information is used to indicate the frequency domain location of the control resource set.

5. The apparatus according to claim 2, wherein, The indication information indicates the frequency domain location of the control resource set based on the reference frequency domain location.

6. The apparatus according to claim 4, wherein, The instruction information indicates that: The frequency domain resources of the control resource set (CORESET) or the subband containing the first predetermined resource in the frequency domain resources of the control resource set; and / or The frequency domain position of the frequency domain resources of the control resource set (CORESET) or the second predetermined resource in the frequency domain resources of the control resource set (CORESET). The first predetermined resource and the second predetermined resource may be the same or different.

7. The apparatus of claim 2, wherein, The relative position refers to the number of resource blocks and / or the number of subcarriers.

8. The apparatus of claim 2, wherein, The indication information indicates the index of the subband where the frequency domain resources of the control resource set (CORESET) or the first predetermined resource in the control resource set (CORESET) are located; or The indication information indicates the relative position of the frequency domain resources of the control resource set (CORESET) or the sub-band containing the first predetermined resource in the control resource set (CORESET) and the sub-band containing the frequency domain position of the first synchronization signal / physical broadcast channel block; or The indication information indicates information related to the synchronization grating in the subband where the frequency domain resources of the control resource set (CORESET) or the first predetermined resource in the control resource set (CORESET) are located.

9. The apparatus of claim 7, wherein, The indication information indicates the offset between the Global Synchronization Channel Number (GSCN) of the second synchronization grating in the subband where the frequency domain resources or the first predetermined resources of the control resource set (CORESET) are located and the Global Synchronization Channel Number (GSCN) of the second synchronization grating corresponding to the first synchronization signal / physical broadcast channel block.

10. The apparatus of claim 2, wherein, The indication information indicates the offset between the first resource block (RB) of the control resource set (CORSET) and the first common resource block (CRB) that overlaps with the first resource block (RB) of the second SSB.

11. The apparatus of claim 2, wherein, The frequency domain position of each physical resource block in the first SSB has a fixed mapping relationship with the frequency domain position of each physical resource block in the control resource set (CORESET).

12. A signal transmission apparatus applied to a network device, the apparatus comprising a second transmission unit configured to: Transmit the first synchronization signal / physical broadcast channel block (SS / PBCH block, SSB) that is not located on the first synchronization grating; and The Physical Downlink Control Channel (PDCCH) is transmitted, which is used to schedule the Physical Downlink Shared Channel (PDSCH) for carrying the Remaining Minimum System Information / System Information Block 1 (RMSI / SIB1). in, The second transmission unit is further configured as follows: The physical downlink control channel (PDCCH) is transmitted on the resources of the control resource set (CORESET) associated with the first synchronization signal / physical broadcast channel block. The control resource set (CORESET) is determined by the relative position between the frequency domain position of the second predetermined resource in the control resource set (CORESET) and the frequency domain position of the fourth predetermined resource of the second SSB. The second SSB is located on the first synchronization grating.

13. The apparatus of claim 12, wherein, The first synchronization signal / physical broadcast channel block carries indication information, which indicates the relative position.

14. The apparatus of claim 13, wherein, The relative position refers to the number of resource blocks and / or the number of subcarriers.

15. The apparatus of claim 13, wherein, The indication information indicates the offset between the first resource block (RB) of the control resource set (CORSET) and the first common resource block (CRB) that overlaps with the first resource block (RB) of the second SSB.

16. A communication system, comprising: A terminal device having a signal transmission means as described in any one of claims 1-11; as well as A network device having means for transmitting signals as described in any one of claims 12-15.

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