​TECHNICAL FIELD
[0001]
​Embodiments of the present application relate to the technical field of wireless communications.
​BACKGROUND OF THE INVENTION
[0002]
​In existing communication protocols (eg, Rel -15 NR), a frequency range of 0-100 GHz defines a Synchronization/frequency raster, or a Synchronization raster​In the case that the synchronization grating indicates that the terminal device does not receive the display signaling indicating the position of the synchronization signal/physical broadcast channel block (SS/PBCH block) (or referred to as Synchronization Signal Block, SS Block, SSB), the synchronization grating may be used to acquire the frequency location of the synchronization signal/physical broadcast channel block of the system related information, and one frequency location corresponds to one global synchronization channel number (GSCN).​On this basis, the value range of the GSCN is defined for part of the NR Operating frequency bands, that is, a corresponding available synchronous grating is defined.
[0003]
​The unlicensed frequency band is an important component of a spectrum resource, and there is currently many systems supporting working in an unlicensed frequency band, such as WiFi, Long Term Evolution (LTE), licensed spectrum Assisted Access (LAA), and the like. However, the New Radio (NR) system does not support working in the unlicensed frequency band.
[0004]
​It should be noted that the above description of the technical background is only for a clear and complete explanation of the technical solutions of the present application, and it is convenient for a person skilled in the art to understand.. The above technical solutions are not considered to be known to those skilled in the art only because these solutions are set forth in the background section of the present application.
[0005]
​SUMMARY OF THE INVENTION
[0006]
​In the time domain, one SSB may include 4 symbols; in the frequency domain, one SSB may include 240 subcarriers, or each RB includes 20 RBs, and each RB includes 12 subcarriers. FIG. 1A is a schematic diagram of a time-frequency domain structure of an SSB.. From the frequency domain, one SSB may be located on the synchronous grating, or not on the synchronization grating. If the sub-carrier of one SSB and one synchronization grating satisfy a predefined mapping relationship, the SSB is located on the synchronous grating; otherwise, if the sub-carrier of the SSB does not satisfy the predefined mapping relationship with one synchronization grating, the SSB is not located on the synchronous grating.​The predefined mapping relationship is, for example, that the synchronization grating corresponds to a specific sub-carrier of the SSB, and the specific sub-carrier is predefined.. For example, as shown in FIG. 1B, the specific subcarrier is the 121th subcarrier of the SSB, or the first subcarrier of the 10th PRB of the SSB. The predefined meaning is defined in the communication protocol.
[0007]
​The inventor of the present application finds that, in the existing NR system design, if one SSB is not located on the synchronous grating, since the SSB is mainly used for measurement of the terminal device, the system is not used for cell selection or reselection, and the terminal device does not need to receive the SIB1 according to the SSB However, with the further evolution of the NR system, the terminal device needs to receive the SIB1 according to the SSB that is not located on the synchronization grating.
[0008]
​Embodiments of this application provide a signal transmission method and apparatus, and a communication system. A first synchronization signal/physical broadcast channel block that is not located on a synchronization grating is associated with a control resource set, the control resource set is used to send a PDCCH, and the PDCCH is used to schedule a physical downlink shared channel (PDSCH) used to carry remaining minimum system information/system information block 1 (RMSI/SIB1). Therefore, 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.
[0009]
​According to a first aspect of the embodiments of this application, a signal transmission method is provided, applied to a terminal device, and the method includes: receiving a first synchronization signal/physical broadcast channel block (SSB), where the first synchronization signal/physical broadcast channel block is not located on a first synchronization grating. And receive 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 SIB 1).
[0010]
​According to a second aspect of the embodiments of the present application, there is provided a signal transmission method applied to a network device, the method comprising: sending a first synchronization signal/physical broadcast channel block (SSB) that is not located on a first synchronization grating; and sending a physical downlink control channel (PDCCH), where the physical downlink control channel (PDCCH) is used to schedule a physical downlink shared channel (PDSCH) for carrying remaining minimum system information/system information block 1 (RMSI SIB 1).
[0011]
​According to a third aspect of the embodiments of the present application, a signal transmission apparatus is provided, which is applied to a terminal device, and the apparatus executes a signal transmission method according to the first aspect of the embodiments of this application
[0012]
​According to a fourth aspect of the embodiments of this application, a signal transmission apparatus is provided, applied to a network device, and the apparatus executes a signal transmission method according to a second aspect of the embodiments of this application
[0013]
​According to a fifth aspect of the embodiments of this application, a terminal device is provided, which has the signal transmission apparatus according to the third aspect of the embodiments of this application.
[0014]
​According to a sixth aspect of the embodiments of this application, a network device is provided, which has the signal transmission apparatus according to the fourth aspect of the embodiments of this application.
[0015]
​According to a seventh aspect of the embodiments of this application, a communication system is provided, which has the terminal device according to the sixth aspect of the embodiments of this application and the network device according to the seventh aspect.
[0016]
​According to an eighth aspect of the embodiments of the present application, there is provided a computer readable program, wherein when the program is executed in a signal transmission apparatus or a terminal device, the program causes a transmission apparatus or a terminal device of the signal to perform the signal transmission method in the first aspect of the embodiments of this application.
[0017]
​According to a ninth aspect of the embodiments of the present application, a storage medium storing a computer readable program is provided, wherein the computer readable program causes a transmission apparatus or a terminal device of a signal to perform the signal transmission method according to the first aspect of the embodiments of this application.
[0018]
​According to a tenth aspect of the embodiments of the present application, there is provided a computer readable program, wherein when the program is executed in a signal transmission apparatus or a network device, the program causes a transmission apparatus or a network device of the signal to perform the signal transmission method according to the second aspect of the embodiments of this application.
[0019]
​According to an eleventh aspect of the embodiments of the present application, a storage medium storing a computer readable program is provided, wherein the computer readable program causes a transmission apparatus or a network device of a signal to perform the signal transmission method according to the second aspect of the embodiments of this application.
[0020]
​The beneficial effects of the embodiments of the present application are as follows: the control resource set is used for transmitting a PDCCH, and the PDCCH is used for scheduling a physical downlink shared channel (PDSCH) used for carrying the remaining minimum system information/system information block 1 (RMSI SIB1); therefore, 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.
[0021]
​With reference to the following description and drawings, specific embodiments of the present application are disclosed in detail, and the manner in which the principles of the present application may be employed is indicated. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the appended claims, embodiments of the present application include many changes, modifications, and equivalents.
[0022]
​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.
[0023]
​It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of features, integers, steps or components, but does not preclude the presence or addition of one or more other features, integers, steps or components.
​BRIEF DESCRIPTION OF THE DRAWINGS
[0024]
​Elements and features described in one or more embodiments of the embodiments of this application may be combined with elements and features illustrated in one or more other figures or implementations. In addition, in the drawings, like reference numerals designate corresponding parts in several drawings, and may be used to indicate corresponding components used in more than one embodiment.
[0025]
​The accompanying drawings are included to provide a further understanding of the embodiments of this application, and constitute a part of the specification, which is used to exemplify the embodiments of the present application and explain the principles of the present disclosure together with the text description.. Obviously, the drawings in the following description are merely some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts.. In the drawings:
[0026]
​FIG. 1A is a schematic diagram of a frequency domain structure of an SSB;
[0027]
​FIG. 1B is a schematic diagram of an SSB on a synchronous grating;
[0028]
​FIG. 1C is an example of sub-band division within a working frequency band;
[0029]
​FIG. 1D is a schematic diagram of a positional relationship between a first synchronous grating and a sub-band;
[0030]
​FIG. 2 is a schematic diagram of a communication system according to an embodiment of this application;
[0031]
​FIG. 3 is a schematic diagram of a signal transmission method in a first aspect of an embodiment of this application;
[0032]
​FIG. 4 is a schematic diagram of a first synchronization grating and a second synchronization grating;
[0033]
​FIG. 5 is a schematic diagram of a correspondence between a first SSB and a second synchronization grating;
[0034]
​FIG. 6A is a schematic diagram of a reference frequency location;
[0035]
​FIG. 6B is a schematic diagram of indication information indicating a frequency domain position of a control resource set based on a CRB;
[0036]
​FIG. 7 is a schematic diagram of a correspondence between a physical resource block grid of a first SSB and a physical resource block grid of a control resource set;
[0037]
​FIG. 8 is a schematic diagram of a signal transmission method according to a second aspect of an embodiment of this application;
[0038]
​FIG. 9 is a schematic diagram of a signal transmission apparatus according to a third aspect of an embodiment of this application;
[0039]
​FIG. 10 is a schematic diagram of a signal transmission apparatus according to a fourth aspect of an embodiment of this application;
[0040]
​FIG. 11 is a schematic block diagram of a system of a terminal device according to a fifth aspect of the embodiments of this application;
[0041]
​FIG. 12 is a schematic structural diagram of a network device according to a sixth aspect of the embodiments of this application;
​DETAILED DESCRIPTION OF THE EMBODIMENTS
[0042]
​The foregoing and other features of the present application will become apparent from the following description with reference to the accompanying drawings.. In the specification and the drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application may be employed, and it should be understood that the present application is not limited to the described embodiments, but on the contrary, the present application includes all modifications, variations, and equivalents falling within the scope of the appended claims.. Various embodiments of the present disclosure will be described below with reference to the accompanying drawings.. These embodiments are exemplary only, and are not intended to limit the present application.
[0043]
​In this embodiment of this application, the terms "first", "second" and the like are used to distinguish different elements from names, but do not indicate the spatial arrangement or chronological order of these elements, etc. and these elements should not be limited by these terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," " including, " "having," and the like refer to the presence of stated features, elements, elements, or components, but do not preclude the presence or addition of one or more other features, elements, elements, or components.
[0044]
​In the embodiments of this application, the singular forms "a", "the" and the like include plural forms and should be construed broadly to mean "a" or "a type" and not to limit the meaning of "an"; in addition, the term "the" should be understood to include both the singular and the plural as well, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "based at least in part on. The term" based on "should be understood as" based at least in part on. " Unless the context clearly dictates otherwise.
[0045]
​In this embodiment of this application, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), Wideband Code Division Multiple Access (WCDMA), High Speed Packet Access (HSPA), High-Speed Packet Access (HSPA), etc.
[0046]
​In addition, the communication between devices in the communication system may be performed according to a communication protocol at any stage, for example, may include, but is not limited to, the following communication protocols: 1G (Generation), 2G, 2.5 G, 2.75 G, 3G, 4G, 4.5 G, and future 5G, New Radio (NR, New Radio, etc.), and/or other communication protocols currently known or future to be developed.
[0047]
​In this embodiment of this application, the term "network device", for example, refers to a device in a communication system for accessing a terminal device to a communication network and providing a service for the terminal device. The network device may include, but is not limited to, a base station (BS), an access point (AP), a transmission reception point (TRP), a transmission reception point (AP), a broadcast transmitter, a mobility management entity (MME), a mobile management entity (RNC), a gateway, a server, a radio network controller (RNC), and a radio network controller (RNC).​For example, the Base Station Controller (BSC) and the Base Station Controller (BSC), etc.
[0048]
​The base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (GMS), and the like, and may further include a Remote Radio Head (RRH), a Remote Radio Unit (RRU), a Remote Radio Unit (RRU), a relay or a low power node (eg, a Femto, a Pico, etc.). And the term "base station" may include some or all of their functionalities, each of which may provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used
[0049]
​In this embodiment of this application, the term "User Equipment" (UE) or "Terminal device" (TE) refers to a device that accesses a communication network through a network device and receives a network service. The User Equipment may be fixed or Mobile, and may also be referred to as a Mobile Station (MS), a Terminal, a Subscriber Station (SS), an Access Terminal (AT), a Station, etc.
[0050]
​The user equipment may include, but is not limited to, a Cellular Phone, a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a machine-type communication device, a laptop computer, a cordless telephone, a smartphone, a smart watch, a Digital camera, etc.
[0051]
​For another example, in a scenario such as an Internet of Things (Internet of Things), the user equipment may also be a Machine or a Device for monitoring or measuring, for example, may include, but is not limited to, a Machine-Type Communication (MTC) terminal, a vehicle-mounted Communication terminal, a Device-to-Device (D2D) terminal, a Machine-to-Machine (M2M) terminal, and the like.
[0052]
​The following describes the scenario of the embodiments of this application by way of example, but the present application is not limited thereto.
[0053]
​FIG. 2 is a schematic diagram of a communications system according to an embodiment of this application, and schematically illustrates a case in which a terminal device and a network device are used as an example, as shown in FIG. 2, the communication system 200 May include a network device 201 and a terminal device 202 (for simplicity, FIG. 2 illustrates only one terminal device as an example).
[0054]
​In this embodiment of this application, existing services or future implementations may be implemented between the network device 201 and the terminal device 202. For example, these services include, but are not limited to: Enhanced Mobile Broadband (Enhanced Mobile Broadband), Large-Scale Machine Type Communication (MWU), Massive Machine Type Communication (URLLC), and High Reliability Low Latency Communication (URLLC), etc.
[0055]
​The terminal device 202 May send data to the network device 201, for example, using a grant-free transmission mode. The network device 201 May receive data sent by the one or more terminal devices 202 and feed back information (eg, ACK/NACK) information to the terminal device 202, and the terminal device 202 May confirm the end transmission process according to the feedback information, or may further perform new data transmission, or may perform data retransmission.
[0056]
​In the following, the network device in the communication system is used as a receiving end, and the terminal device is used as an example for description, but the present application is not limited thereto, and the sending end and/or the receiving end may also be other devices.. For example, the present application is not only applicable to uplink grant-free transmission between a network device and a terminal device, but also applicable to sidelink grant-free transmission between two terminal devices.
[0057]
​The English and Chinese names corresponding to the abbreviations involved in the present application are as follows:
[0058]
​CORESET_Control_RESOURCE SET: Control Resource Set
[0059]
​CRB_Common RESOURCE BLOCK: Common RESOURCE BLOCK
[0060]
​PRB Physical Resource Block: Physical Resource Block (which may be interchangeable/equivalent with an RB in some cases)
[0061]
​RB Resource Block: Resource Block
[0062]
​RE-RESOURCE RESOURCE ELEMENT: RESOURCE ELEMENT
[0063]
​BWP Bandwidth part: Bandwidth part.
[0064]
​DCI Downlink Downlink Control Information: Downlink Control Information
[0065]
​PDCCH Physical Downlink Control Channel: Physical Downlink Control Channel
[0066]
​Physical Downlink Shared Channel: Physical Downlink Shared Channel
[0067]
​Physical Broadcast Channel: Physical Broadcast Channel
[0068]
​DM-RS Modulation Reference Signal: Demodulation Reference Signal
[0069]
​PSS-Primary SYNCHRONIZATION SIGNAL: MAIN SYNCHRONIZATION SIGNAL
[0070]
​SSS/Secondary SYNCHRONIZATION SIGNAL: Secondary SYNCHRONIZATION SIGNAL
[0071]
​Layer 1: Layer 1 (physical layer)
[0072]
​SSB synchronization signal block, or SS/PBCH block: synchronization signal block, or synchronization signal/physical broadcast channel block.
[0073]
​PLMN Public Land Land Mobile Network: Public Land Mobile Network
[0074]
​System Information Block: System Information Block
[0075]
​SIB 1 (Sib1 is Also Red to As Remaining Minimum System Information System (RMSI): System Information Block 1, System Information Block 1 is also referred to as the remaining minimum system information
[0076]
​GSCN: Global Synchronization Channel Number: Global Synchronization Channel Number
[0077]
​NR New New Radio: New Air Interface
[0078]
​NR-ARFCN ΔNR Absolute Radio Frequency Channel Number: New Air Interface-Absolute Radio Frequency Channel Number
[0079]
​SCS/Sub-Sub-Carrier Spacing: subcarrier Spacing
[0080]
​FR-Frequency Range Range: Frequency Range
[0081]
​Cell-defined SSB (CD-SSB) IS/SSB with an RMSI associated: cell-defined SSB is an SSB associated with RMSI
[0082]
​CORESET # 0: the control resource set CORESET # 0 is at least used for the control resource set scheduled by the SIB1.
[0083]
​In aspects of the embodiments of this application, "predetermined" parameter or "preset" parameter may refer to a parameter pre-defined or set in a communication protocol.
[0084]
​In aspects of the embodiments of this application, the terms such as determining, and the like are similar, and in some cases may be replaced.
[0085]
​First aspect of embodiments
[0086]
​A first aspect of the embodiments of this application relates to a signal transmission method, applied to a terminal device, for example, a terminal device 202
[0087]
​FIG. 3 is a schematic diagram of a signal transmission method according to an embodiment of this application, as shown in FIG. 3, the signal transmission method may include:
[0088]
​Operation 301: Receive a first synchronization signal/physical broadcast channel block (SSB), where the first synchronization signal/physical broadcast channel block is not located on a first synchronization grating; and
[0089]
​Operation 302: Receive a physical downlink control channel (PDCCH), where the physical downlink control channel (PDCCH) is used to schedule a physical downlink shared channel (PDSCH) for carrying remaining minimum system information/system information block 1 (RMSI SIB 1).
[0090]
​According to a first aspect of the embodiments of this application, when receiving a first synchronization signal/physical broadcast channel block that is not located on a first synchronization grating, a PDCCH is received, where the PDCCH is used to schedule a physical downlink shared channel (PDSCH) used to carry remaining minimum system information/system information block 1 (RMSI SIB1), and therefore, 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.
[0091]
​With further evolution of the NR system, in some scenarios, the terminal device needs to receive SIB1 according to the SSB that is not located on the synchronization grating
[0092]
​For example, an NR system may support operating in an unlicensed frequency band (NR_U). On the unlicensed frequency band, multiple operators may be deployed independently on the same channel, and PCI confusion/collision issues may occur between different operator networks.. One possible solution of the problem is that the network device instructs the terminal device to measure and report CGI related information of the cell, where the CGI related information includes at least operator related information, such as a public land mobile network identifier (PLMN ID), etc.​In order to enable the terminal device to acquire and report CGI related information of the cell, the terminal device needs to receive the SIB1 of the cell according to the SSB that is not located on the synchronization grating.
[0093]
​Since the SIB1 is carried by the PDSCH and the PDSCH is scheduled by the PDCCH, in order to enable the terminal device to receive the SIB1 of the cell, the terminal device needs to know related information of the PDCCH used for scheduling the PDSCH carrying the SIB1, for example, the control resource set used for transmitting the PDCCH can monitor and receive the PDCCH, and then receive the PDSCH.. Therefore, if the terminal device needs to receive the SIB1 according to the SSB that is not located on the synchronization grating, the terminal device needs to learn the control resource set according to the SSB.
[0094]
​In the first aspect of the embodiments of this application, since the Rel -15 only supports the operation of the NR system on the licensed frequency band, the existing synchronization grating may not be defined for the working frequency band of the unlicensed frequency band in the existing protocol with respect to the NR system.. Therefore, in order to support the NR system to operate on an unlicensed frequency band, a corresponding available synchronous grating needs to be defined for the working frequency band of the unlicensed frequency band.. In order to reduce the complexity of the terminal device receiving the SSB without receiving the display signaling indicating the position of the SSB, fewer available synchronization gratings may be defined.. For ease of description, the available synchronization grating defined in the working frequency band of the unlicensed frequency band is referred to as the first synchronization grating.​A working frequency band may include one or more sub-bands, and the bandwidths of different sub-bands are the same or different. In one of the sub-bands, for example, the predefined X (E/G X = 1) first synchronization grating.. A first synchronization grating may be the same as or different from the frequency location of one of the second synchronization gratings described below.. The interval between two adjacent first synchronous gratings is, for example, Y (Y is an integer multiple of 1.44).
[0095]
​Assuming that the frequency range corresponding to the operating frequency band (eg, N 46) of one unlicensed frequency band is F 1 (eg, 5150)-F 2 (eg, 5925). Taking this working frequency band as an example, FIG. 1C is an example of sub-band division within a working frequency band. In FIG. 1C, the bandwidth of the plurality of sub-bands is the same, and the bandwidth of one sub-band is 20 m/z.
[0096]
​FIG. 1D is a schematic diagram of a positional relationship between a first synchronous grating and a sub-band, and one first synchronization grating 100 is predefined in one sub-band
[0097]
​In Rel -15 NR, a synchronization grating (ie, a second synchronization grating) defined for a frequency range of 0-100 GHz is shown in Table 1.. According to Table 1, within the frequency range corresponding to the working frequency band, the interval between two adjacent second synchronous gratings is 1.44 m/z.
[0098]
​Table 1:
[0099]

[0100]
​FIG. 4 is a schematic diagram of a positional relationship between a first synchronous grating and a second synchronous grating. Taking a sub-band with a frequency range of 5150-5170 MHz as an example, each frequency position of the second synchronous grating in the sub-band and the corresponding GSCN are as shown in FIG. 4.. One first synchronization grating 401 is predefined in the sub-band, and the frequency position of the first synchronization grating 401 is the same as the frequency position in the second synchronization grating corresponding to GSCN = 8996. That is, the second synchronization grating corresponding to GSCN = 8996 is the first synchronization grating in the sub-band.
[0101]
​In a first aspect of the embodiments of this application, the first synchronization signal/physical broadcast channel block (SSB) is not located on the first synchronization grating, and refers to that the first SSB subcarrier does not satisfy a predefined mapping relationship with the first synchronization grating.. The predefined mapping relationship is, for example, that the first synchronization grating corresponds to a specific subcarrier of the first SSB, and the specific subcarrier is predefined.
[0102]
​In a first aspect of the embodiments of this application, the control resource set is used to send a control resource set for scheduling a PDCCH carrying RMSI SIB1 (or the control resource set is a control resource set of a type 0-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 time domain includes 1 or 2 symbols; the control resource set includes 48 physical resource blocks in the frequency domain (with the subcarrier spacing SCS being 30 kHz) or 96 (the case where the subcarrier spacing SCS is 15 kHz), and in addition,​The resources of the control resource set on the frequency domain May also be represented by sub-carriers. The terminal device 202 needs to acquire at least the position of the frequency domain resource of the control resource set, so as to receive the PDCCH sent by the control resource set according to the frequency domain resource.
[0103]
​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 may be table as follows:
[0104]
​In a first aspect of the embodiments of this application, as shown in FIG. 3, the method further includes:
[0105]
​Operation 303: Before receiving the physical downlink control channel, the terminal device 202 determines a control resource set for transmitting a physical downlink control channel according to 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.
[0106]
​In a first aspect of the embodiments of this application, a control resource set for transmitting a PDCCH for scheduling a PDCCH carrying RMSI SIB 1 is associated with a first synchronization signal/physical broadcast channel block, and thus, the terminal device 202 can determine a control resource set for transmitting the physical downlink control channel according to the first synchronization signal/physical broadcast channel block (SSB).
[0107]
​In the following, an implementation of the operation 303 is described according to different embodiments.
[0108]
​Embodiment 1
[0109]
​The terminal device 202 determines a control resource set for transmitting a physical downlink control channel according to the frequency domain position of the first synchronization signal/physical broadcast channel block.
[0110]
​DETAILED DESCRIPTION OF THE EMBODIMENTS
[0111]
​In at least one embodiment, the frequency domain position relationship of the control resource set and the first SSB is predefined. For example, a relative position or offset of a predetermined resource (ie, a predefined resource) in the frequency domain resource of the control resource set (CORESET) and a predetermined resource (ie, a predefined resource) in the frequency domain resource of the first synchronization signal/physical broadcast channel block is a first predetermined value (ie, a predefined value). Therefore, the terminal device may determine the frequency domain position of the predetermined resource in the frequency domain resource of the control resource set (CORESET) according to the frequency domain position of the first synchronization signal/physical broadcast channel block and the first predetermined value.
[0112]
​The Predetermine Resource in the Frequency Domain Resource of the Control Resource Set may Be: N Resource Blocks or Subcarriers in the Control Resource Set, AND A Natal Number, for Example, A First Subcarrier in the Control Resource Set. The pre-determined resource in the frequency domain resource of the first synchronization signal/physical broadcast channel block may be: K resource blocks or subcarriers in the first SSB, and K is a natural number, for example, a first subcarrier in the first SSB.. In the control resource set in one sub-band is predefine, and the position relationship ship between the sub-band where the control resource set is located and the sub-band where the first SSB is located predefine.​Therefore, the terminal device may determine the sub-band where the control resource set is located according to the sub-band where the first SSB is located, and since the frequency domain position of the control resource set in one sub-band is predefined, the terminal device may further determine the frequency domain position of the control resource set in the determined sub-band.
[0113]
​The subband where the first SSB is located is a frequency domain resource of the first SSB or a subband where the predetermined resource in the frequency domain resource of the first SSB is located.. The predetermined resource is, for example, a first resource block or a subcarrier in the first SSB, S is a natural number, for example, an intermediate subcarrier, that is, a 121 subcarrier, or a first subcarrier of the PRB 10. The relative position or offset between the sub-band where the control resource set is located and the sub-band where the first SSB is located is a second predetermined value (ie, a predefined value), for example, the second predetermined value may be equal to 0, that is, the sub-band where the control resource set is located is a sub-band where the first SSB is located.​The frequency domain position of the control resource set in one sub-band may be pre-defined as a position related to the frequency domain position of the first synchronization grating in the one sub-band, for example, the related one frequency domain position may be a frequency domain position of the first synchronous grating plus or minus one frequency domain position obtained by a predetermined value; or a frequency domain position related to a frequency domain resource of a second SSB on the first synchronization grating in the one sub-band, wherein the second SSB is located on the first synchronization grating in the one sub-band, for example, the related one frequency domain position may be a frequency domain resource of the second SSB plus or minus one frequency domain position obtained by a predetermined value.
[0114]
​Embodiment 2
[0115]
​The terminal device 202 determines a control resource set for transmitting the physical downlink control channel according to the indication information carried by the first synchronization signal/physical broadcast channel block.
[0116]
​DETAILED DESCRIPTION OF THE EMBODIMENTS
[0117]
​In Embodiment 2, the indication information is used to indicate a frequency domain position of the control resource set (eg, CORESET # 0).
[0118]
​The indication information may be carried in a first synchronization signal/physical broadcast channel block, for example, a primary synchronization signal (PSS) in a first synchronization signal/physical broadcast channel block carried in a first synchronization signal/physical broadcast channel block, and/or a secondary synchronization signal (SSS), and/or a physical broadcast channel (PBCH), and/or a physical broadcast channel demodulation reference signal (PBCH-DMRS).
[0119]
​In various embodiments of the second embodiment, the indication information may indicate a sub-band and/or a frequency location.
[0120]
​In a specific implementation, the indication information may indicate a frequency domain resource of the control resource set (CORESET) or a subband where the first predetermined resource in the frequency domain resource of the control resource set is located; and/or a frequency domain resource of the control resource set (CORESET) or a frequency domain location of a second predetermined resource in the frequency domain resource of the control resource set (CORESET).. The first predetermined resource may be represented by a resource block or a subcarrier, and the second predetermined resource may be represented by a resource block or a subcarrier, and the first predetermined resource and the second predetermined resource may be the same or different.
[0121]
​In at least one embodiment, in the case that the indication information indicates a sub-band, the terminal device may determine the sub-band of the frequency domain resource of the control resource set (CORESET) according to the indication information.. Therefore, the terminal device may determine the frequency domain resource of the control resource set in combination with the frequency domain position of the frequency domain resource of the control resource set (CORESET) in one sub-band.. For example, the frequency domain position of the first predetermined resource of the control resource set in the sub-band is a preset position (ie, the frequency domain position is preset), or the frequency domain position indicated by the indication information.
[0122]
​In at least one embodiment, where the indication information indicates a sub-band, the indication information may indicate an index of a sub-band where the first predetermined resource in the frequency domain resource or control resource set (CORESET) of the control resource set (CORESET) is located, for example, the index of the sub-band may be represented as a numerical value.
[0123]
​In at least one embodiment, in the case that the indication information indication channel is indicated, the indication information may also indicate the relative position of the subband where the first predetermined resource in the frequency domain resource or control resource set (CORESET) of the control resource set (CORESET) is located and the frequency domain position of the first synchronization signal/physical broadcast channel block, where 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 the subcarrier in the first SSB, and K is a natural number;
[0124]
​In at least one embodiment, where the indication information indicates a sub-band, the indication information may indicate information related to a synchronization grating in a frequency domain resource of a control resource set (CORESET) or a synchronization grating in a channel of a first predetermined resource in the control resource set (CORESET).
[0125]
​For example, the indication information may indicate an offset value between a global synchronization channel number (GSCN) of a frequency domain resource in a control resource set (CORESET) or a global synchronization channel number (GSCN) of a second synchronization grating in a channel where the first predetermined resource is located, and a global synchronization channel number (GSCN) of a second synchronization grating corresponding to the first synchronization signal/physical broadcast channel block.
[0126]
​FIG. 5 is a schematic diagram of a correspondence between a first SSB and a second synchronization grating.. As shown in FIG. 5, the first SSB is not transmitted to the first synchronization grating 500, but the first sub-carrier of the resource block 10 of the first SSB is the same as the frequency of the second synchronization grating 501, that is, the first SSB is located in the second synchronization grating 501, and therefore, the second synchronization grating 501 is a second synchronization grating corresponding to the first SSB.. In the sub-band 502 where the first predetermined resource (eg, resource block 0) of the control resource set is located, the second synchronization grating 503 is provided
[0127]
​The terminal device can obtain the GSCN of the second synchronization grating 503 according to the GSCN and the offset value of the second synchronization grating 501, and can determine the frequency position of the second synchronization grating 503 according to the GSCN of the second synchronization grating 503.. Since the frequency range of the sub-band is preset, the terminal device may determine the sub-band 502 at which the second synchronization grating 503 is located according to the frequency position of the second synchronization grating 503, and the channel 502 is a sub-band where the first predetermined resource of the control resource set is located.
[0128]
​In at least one embodiment, where the indication information indicates a frequency location, the terminal device may determine a frequency domain location of a second predetermined resource in the control resource set (CORESET) according to the indication information.
[0129]
​For example, the indication information may indicate a relative position of a frequency domain position of a second predetermined resource in the control resource set (CORESET) and a reference frequency position.
[0130]
​The reference frequency location may be a predefined frequency location or a frequency location indicated by the network device 201 to the terminal device 202.
[0131]
​In at least one embodiment, the reference frequency location may be a frequency domain location of a third predetermined resource of the first SSB, for example, the third predetermined resource is the m th resource block or the subcarrier in the frequency domain resource of the first SSB, the frequency domain position of the third predetermined resource is the frequency domain position of the third predetermined resource, and M is a natural number.
[0132]
​In at least one embodiment, the reference frequency location may also be a frequency domain location of a fourth predetermined resource of the second SSB, for example, the fourth predetermined resource may be an L th resource block or a subcarrier in the frequency domain resource of the second SSB, and L is a natural number.. In one 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, indicated by the indication information.
[0133]
​In at least one embodiment, the reference frequency location may also be the frequency domain resource of the control resource set (CORESET) (all the frequency domain resources are within one channel) or the frequency location of the first synchronization grating in the sub-band where the second predetermined resource in the frequency domain resource of the control resource set is located.. In a specific embodiment, the frequency position of the first synchronous grating in the sub-band may be a predefined frequency position, or the frequency position of the first synchronization grating in the sub-band may be indicated by the network device 201, for example, indicated by the indication information.
[0134]
​FIG. 6A is a schematic diagram of a reference frequency location. As shown in FIG. 6A, the reference frequency location 601 May be a frequency domain location of a first resource block (eg, resource block 0) or a subcarrier in the first SSB.. The reference frequency location 602 is a frequency domain location of the first resource block (eg, resource block 0) or subcarrier of the second SSB. The reference frequency location 603 is a frequency location of the first synchronization grating 604 in the frequency domain resource of the control resource set (CORESET) or the first synchronization grating 604 in the channel 600 where the subcarrier is located.
[0135]
​In FIG. 6A, the reference frequency location may be one of 601, 602, 603. The indication information may indicate a relative position of the frequency domain position of the second predetermined resource in the control resource set (CORESET) and the reference frequency position.. For example, where the reference frequency location is 602, the indication information T may indicate a relative position between the reference frequency location 602 and the frequency domain location 605 (eg, the frequency domain location of the first resource block or subcarrier) of the second predetermined resource in the control resource set (CORESET).
[0136]
​In at least one embodiment, the relative position indicated by the indication information includes the relative position of the RB-level and/or the relative position of the subcarrier-level, for example, may be 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.
[0137]
​In one embodiment, the indication information may indicate a frequency domain location of the control resource set based on the CRB. FIG. 6B is a schematic diagram of indication information indicating a frequency domain position of a control resource set based on a CRB.. As shown in FIG. 6B, the indication information indicates the offset between the RB index corresponding to the first RB of the control resource set and the RB index corresponding to the first RB overlapping the first RB of the second SSB, that is, the relative position of the RB-level, for example, OFFSET_1 in FIG. 6A; and/or the indication information indicates an offset between the first subcarrier of the first CRB overlapping the first RB of the second SSB and the first subcarrier of the second SSB, that is,​For example, the relative position of sub-carrier level (sub-level), for example, offset_2 of FIG. 6A
[0138]
​On the other hand, the indication information may be included in the MIB of the PBCH, and in order to reduce the modification to the existing communication protocol as much as possible, the product production period and cost are reduced, and the indication information is, for example, the bits corresponding to the ControlResourceSetzero and/or the SubCarrierSspacing common of the MIB in Rel -15 NR.. That is, the multiplexing ControlResourceSetZerzero and/or the subcarrier spacing common and/or the SSB-SubCarrierOffset indicates the relative position.​For example, the multiplexing control resource setzero and/or the subcarrier spacing common indicates the relative position of the RB-level, and the multiplexing SSB-subcarrier offset indicates the relative position of the subcarrier-level,
[0139]
​In Embodiment 2, the indication information may also indicate both the indication subband and the frequency domain location.. For example, at least one bit in the indication information is used to indicate a channel, and another at least one bit in the indication information is used to indicate a frequency domain position, an indication channel, and a manner of indicating a frequency domain position may be as described above.. For another example, a plurality of combinations of the channel and the frequency domain location may be preset, and the indication information may indicate one of the plurality of combinations, so as to jointly indicate the sub-band and the frequency domain location.
[0140]
​In this application, the first implementation mode and the second implementation mode may be combined, that is, part of the parameters used for determining the frequency domain resource of the control resource set may be determined according to the frequency domain position of the first SSB, and the other part of the parameters may be determined according to an indication of the indication information, and in addition, the remaining part parameters may be predefined by the communication protocol. For example, the terminal device 202 determines a sub-band in the frequency domain resource of the control resource set according to the frequency domain position of the first SSB, and obtains a frequency domain position of the control resource set indicated based on the reference frequency domain position according to the indication information, wherein the reference frequency domain position is predefined as the first synchronous grating of the sub-band where the control resource set is located.
[0141]
​In Embodiments 1 and 2, the frequency domain location of each physical resource block of the first SSB and the frequency domain location of each physical resource block in the control resource set (CORESET) may have a fixed mapping relationship, for example, in the frequency domain, a physical resource block grid (PRB Grid) of the first SSB is consistent with or has a fixed offset with a physical resource block grid (PRB Grid) of the control resource set.. The network device 201 needs to transmit the first SSB and the control resource set (CORESET) with the above fixed mapping relationship.
[0142]
​FIG. 7 is a schematic diagram of a correspondence between a physical resource block grid of a first SSB and a physical resource block grid of a control resource set.. As shown in FIG. 7, in a physical resource block grid (PRB Grid) of the first SSB, a fixed offset 703 is provided between the start frequency 701 of the physical resource block 10 and the start frequency 702 of the physical resource block grid (PRB Grid) of the control resource set
[0143]
​In addition, this embodiment may not be limited thereto, for example, in FIG. 7, the start frequency 701 of the physical resource block 10 and the start frequency 702 of the physical resource block grid (PRB Grid) of the control resource set may be the same, that is, the physical resource block grid (PRB Grid) of the first SSB and the physical resource block grid (PRB Grid) of the control resource set may be kept consistent.
[0144]
​Therefore, in the case that the first SSB is received, the terminal device may learn the physical resource block grid (PRB Grid) of the control resource set associated with the first SSB according to the physical resource block grid (PRB Grid) of the first SSB, and obtain the frequency domain resource of the control resource set in combination with other information.. The other information is, for example, a channel where a start frequency of a predetermined resource of the control resource set is located, a relative position of a frequency domain position of a second predetermined resource in the control resource set and a reference frequency position, etc. and the other information may be preset or indicated by the indication information described above.
[0145]
​In a first aspect of the embodiments of this application, before the terminal device receives the first SSB, the network device may receive, by using the measurement configuration, a frequency domain location of the first SSB and/or a PCI corresponding to the first SSB, and the network device receives the first SSB according to the measurement configuration.. Moreover, the measurement configuration may instruct the terminal device to report CGI related information of the cell corresponding to the PCI, and report CGI related information of the cell after receiving SIB1 of the cell.
[0146]
​According to a first aspect of the embodiments of this application, when receiving a first synchronization signal/physical broadcast channel block sent on a non-first synchronization grating, a PDCCH is received, where the PDCCH is used to schedule a physical downlink shared channel (PDSCH) used to carry remaining minimum system information/system information block 1 (RMSI SIB1), and therefore, 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.
[0147]
​Second aspect of embodiments
[0148]
​A second aspect of the embodiments of this application relates to a signal transmission method, applied to a network device, for example, a network device 201
[0149]
​FIG. 8 is a schematic diagram of a signal transmission method according to an embodiment of this application, as shown in FIG. 8, the signal transmission method may include:
[0150]
​Operation 801: Send a first synchronization signal/physical broadcast channel block (SSB) that is not located on a first synchronization grating; and
[0151]
​Operation 802: Send a physical downlink control channel (PDCCH), where the physical downlink control channel (PDCCH) is used to schedule a physical downlink shared channel (PDSCH) for carrying remaining minimum system information/system information block 1 (RMSI SIB 1).
[0152]
​In a second aspect of the embodiments of this application, in operation 802, the network device 201 sends the physical downlink control channel (PDCCH) on a resource of a control resource set (CORESET) associated with the first synchronization signal/physical broadcast channel block.
[0153]
​As shown in FIG. 8, the method further includes:
[0154]
​Operation 803: The network device 201 sends a measurement configuration to the terminal device 202, so that the terminal device 202 May obtain the frequency domain position of the first synchronization signal/physical broadcast channel block according to the measurement configuration.
[0155]
​In a second aspect of the embodiments of this application, the relative position of the frequency domain position of the predetermined resource in the frequency domain resource of the control resource set (CORESET) and the frequency domain position of the first synchronization signal/physical broadcast channel block is a first predetermined value.
[0156]
​In at least one embodiment, the relative position between the sub-band at the frequency domain resource of the control resource set (CORESET) and the sub-band at the frequency domain position of the first synchronization signal/physical broadcast channel block is a second predetermined value, wherein the frequency domain resource of the control resource set (CORESET) is located in the same sub-band, and the predetermined resource of the control resource set (CORESET) is located at a predetermined position in the sub-band.
[0157]
​In at least one embodiment, the first synchronization signal/physical broadcast channel block may carry indication information, and the indication information may be used to indicate a frequency domain position of the control resource set.
[0158]
​For example, the indication information may indicate a frequency domain resource of the control resource set (CORESET) or a subband where the first predetermined resource in the frequency domain resource of the control resource set is located; and/or a frequency domain resource of the control resource set (CORESET) or a frequency domain position of the second predetermined resource in the control resource set (CORESET) in the subband.. The first predetermined resource and the second predetermined resource are the same or different.
[0159]
​When the indication information indicates a sub-band, the indication information may indicate an index of a sub-band where a first predetermined resource in a frequency domain resource or a control resource set (CORESET) of the control resource set (CORESET) is located.
[0160]
​When the indication information indicates the sub-band, the indication information may also indicate the relative position of the subband where the first predetermined resource in the frequency domain resource or control resource set (CORESET) of the control resource set (CORESET) is located and the sub-band where the first synchronization signal/physical broadcast channel block is located.
[0161]
​When the indication information indicates the sub-band, the indication information may also indicate information related to the synchronization grating corresponding to the sub-band where the first predetermined resource in the control resource set (CORESET) is located or the sub-band where the first predetermined resource in the control resource set (CORESET) is located.. For example, the indication information indicates an offset value between a global synchronization channel number (GSCN) of a second synchronization grating in a frequency domain resource or a control resource set (CORESET) of the control resource set (CORESET) and a global synchronization channel number (GSCN) of a second synchronization grating corresponding to the first synchronization signal/physical broadcast channel block.
[0162]
​When the indication information indicates the 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) and the reference frequency position.
[0163]
​In at least one embodiment, the relative position is the number of resource blocks and/or the number of subcarriers.
[0164]
​In at least one embodiment, the reference frequency location is a frequency domain location of a third predetermined resource of the first SSB, or a frequency domain location of a fourth predetermined resource of the second SSB, or a frequency location of the first synchronization grating in the subband where the second predetermined resource in the frequency domain resource of the control resource set (CORESET) or the frequency domain resource of the control resource set is located.
[0165]
​In at least one embodiment, the reference frequency location may be a preset frequency location, or a frequency location indicated by the network device 201.
[0166]
​In at least one embodiment, the frequency domain position of each physical resource block of the first SSB sent by the network device 201 and the frequency domain position of each physical resource block in the control resource set (CORESET) may have a fixed mapping relationship.
[0167]
​According to a second aspect of the embodiments of the present application, in the case that the first synchronization signal/physical broadcast channel block is sent on the non-first synchronization grating, the network device sends a PDCCH on a control resource set associated with the first SSB, where 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), and therefore, 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.
[0168]
​Third aspect of embodiments
[0169]
​A third aspect of the embodiments of the present application provides a signal transmission apparatus, which is applied to a terminal device, for example, a transmission apparatus of the signal of the terminal device 202 is used to implement the signal transmission method according to the first aspect of the embodiments
[0170]
​FIG. 9 is a schematic diagram of a signal transmission apparatus according to a third aspect of an embodiment of this application, as shown in FIG. 9, the signal transmission apparatus 900 includes a first transmission unit 901
[0171]
​The first transmission unit 901 May implement the signal transmission method according to the first aspect of the embodiments of this application. With regard to the description of the transmission method of the signal in the first transmission unit 901, reference may be made to the description of the signal transmission method in the first aspect of the embodiments of this application.
[0172]
​Fourth aspect of embodiments
[0173]
​A fourth aspect of the embodiments of the present application provides a signal transmission apparatus, applied to a network device, for example, a transmission apparatus of the signal of the network device 201 to implement the signal transmission method according to the second aspect of the embodiments.
[0174]
​FIG. 10 is a schematic diagram of a signal transmission apparatus according to a fourth aspect of an embodiment of this application, as shown in FIG. 10, the signal transmission apparatus 1000 includes a second transmission unit 1001
[0175]
​The second transmission unit 1001 May implement the signal transmission method according to the second aspect of the embodiments of this application. With regard to the description of the transmission method for the second transmission unit 1001 to implement the signal, reference may be made to the description of the signal transmission method in the second aspect of the embodiments of this application.
[0176]
​Fifth aspect of embodiments
[0177]
​A fifth aspect of the embodiments of this application provides a terminal device, where the terminal device includes a signal transmission apparatus 900 according to a third aspect of the embodiments
[0178]
​FIG. 11 is a schematic block diagram of a system of a terminal device 1100 according to a fifth aspect of the embodiments of this application. As shown in FIG. 11, the terminal device 1100 May include a processor 1110 and a memory 1111; the memory 1111 is coupled to the processor 1110 to note that the diagram is exemplary; other types of structures may also be used to supplement or replace the structure to implement telecommunication functions or other functions.
[0179]
​In one embodiment, the functionality of the transmission device 900 of the signal may be integrated into the processor 1110. The processor 1110 May be configured to implement a transmission method of the signal in the first aspect of the embodiments.
[0180]
​In another embodiment, the transmission device 900 of the signal may be configured separately from the processor 1110, for example, the transmission device 900 of the signal may be configured as a chip connected to the processor 1110, and the function of the signal transmission apparatus 900 is implemented by the control of the processor 1110.
[0181]
​As shown in FIG. 11, the terminal device 1100 May further include: a communication module 1130, an input unit 1140, a display 1150, and a power supply 1160. It should be noted that the terminal device 1100 is not necessarily all the components shown in FIG. 11; in addition, the terminal device 1100 May further include the components not shown in FIG. 11, and may refer to the prior art.
[0182]
​As shown in FIG. 11, the processor 1110 is sometimes referred to as a controller or an operation control, and may include a microprocessor or other processor device and/or logic device, and the processor 1110 receives input and controls operation of various components of the terminal device 1100
[0183]
​The memory 1120 May be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices.. The various data may be stored, and the program for executing the information may also be stored. And the processor 1110 May execute the program stored in the memory 1120 to implement information storage or processing.. The functions of other components are similar to those of the prior art, and details are not described herein again.. The components of the terminal device 1100 May be implemented by dedicated hardware, firmware, software, or a combination thereof without departing from the scope of the present application.
[0184]
​Sixth aspect of embodiments
[0185]
​A sixth aspect of the embodiments of this application provides a network device, where the network device includes a signal transmission apparatus 1000 according to a fourth aspect of the embodiments
[0186]
​FIG. 12 is a schematic structural diagram of a network device according to an embodiment of this application. As shown in FIG. 12, 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 May store various data; and in addition, the processor 1210 stores the information processing program 1230, and executes the program 1230 under the control of the processor 1210 to receive various information sent by the user equipment, and send the request information to the user equipment.
[0187]
​In one embodiment, the functionality of the transmission device 1000 of the signal may be integrated into the processor 1210. The processor 1210 May be configured to implement the signal transmission method according to the second aspect of the embodiments of this application.
[0188]
​In another embodiment, the signal transmission apparatus 1000 May be separately configured with the processor 1210, for example, the transmission apparatus 1000 of the signal may be configured as a chip connected to the processor 1210, and the function of the signal transmission apparatus 1000 is implemented by the control of the processor 1210.
[0189]
​In addition, as shown in FIG. 12, the network device 1200 May further include a transceiver 1240 and an antenna 1250, and the functions of the foregoing components are similar to those of the prior art, and details are not described herein again.. It should be noted that the network device 1200 is not necessarily all the components shown in FIG. 12; in addition, the network device 1200 May further include the components not shown in FIG. 12, and may refer to the prior art.
[0190]
​Seventh aspect of embodiments
[0191]
​A seventh aspect of the embodiments of this application further provides a communication system, including the network device according to the sixth aspect of the embodiment and the terminal device according to the fifth aspect of the embodiment.
[0192]
​The apparatus and method above may be implemented by hardware, or may be implemented by hardware in combination with software. This application relates to a computer readable program that, when executed by a logic component, enables the logic to implement the apparatus or constituent components described above, or to enable the logic to implement the various methods or steps described above.. The present application further relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a Flash memory, etc.
[0193]
​The method/apparatus described in connection with the embodiments of this application may be embodied directly as hardware, a software module executed by a processor, or a combination of the two. For example, one or more combinations of one or more of the functional blocks shown in the figures and/or functional block diagrams may correspond to various software modules of a computer program flow, or may correspond to various hardware modules. These software modules may correspond to the various steps shown in the figures, respectively. These hardware modules may, for example, be implemented using a field programmable gate array (FPGA) to cure these software modules.
[0194]
​A software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in a memory of the mobile terminal, or may be stored in a memory card that can be inserted into the mobile terminal.​For example, if a device (such as a mobile terminal) uses a MEGA-SIM card with a larger capacity or a flash memory device with a large capacity, the software module may be stored in the MEGA-SIM card or a large-capacity flash memory device.
[0195]
​For one or more combinations of one or more and/or functional blocks in the functional blocks described in the figures, a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or any suitable combination thereof, may be implemented for performing the functions described herein. One or more combinations of one or more and/or functional blocks in the functional blocks described with respect to the figures may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.
[0196]
​The present application has been described above in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of the present application.. Various variations and modifications can be made by those skilled in the art according to the spirit and principle of the present application, which are also within the scope of the present application.
[0197]
​With regard to the embodiments comprising the above embodiments, the following additional features are also disclosed:
[0198]
1. ​A signal transmission method, applied to a terminal device, the method comprising:
[0199]
​receive a first synchronization signal/physical broadcast channel block (SSB), where the first synchronization signal/physical broadcast channel block is not located on a first synchronization grating; and
[0200]
​receiving a physical downlink control channel (PDCCH), the physical downlink control channel (PDCCH) being used for scheduling a physical downlink shared channel (PDSCH) for carrying remaining minimum system information/system information block 1 (RMSI SIB1).
[0201]
2. ​The method of Annex 1, wherein the method further comprises:
[0202]
​determining, by the terminal device, a control resource set for transmitting the physical downlink control channel according to the frequency domain position of the first synchronization signal/physical broadcast channel block and/or indication information carried by the first synchronization signal/physical broadcast channel block before receiving the physical downlink control channel.
[0203]
3. ​The method of Annex 2, wherein
[0204]
​The relationship between the control resource set and the frequency domain position of the first SSB is predefined.
[0205]
4. ​The method according to claim 2 or 3, wherein the relative position of the frequency domain position of the predetermined resource in the frequency domain resource of the control resource set (CORESET) and the frequency domain position of the first synchronization signal/physical broadcast channel block is a first predetermined value.
[0206]
5. ​Method according to Annex 2 or 3,
[0207]
​the relative position between the sub-band at the frequency domain resource of the control resource set (CORESET) and the sub-band in the frequency domain position of the first synchronization signal/physical broadcast channel block is a second predetermined value,
[0208]
​The frequency domain resource of the control resource set (CORESET) is located in the same sub-band, and the predetermined resource of the control resource set (CORESET) is located at a predetermined position in the sub-band.
[0209]
6. ​The method of Annex 5, wherein
[0210]
​In different sub-bands, the predetermined positions of the predetermined resources of the control resource set (CORESET) are the same or different.
[0211]
7. ​Method according to Annex 5 or 6,
[0212]
​In the same sub-band, for different subcarrier spacings, the predetermined positions of the predetermined resources of the control resource set (CORESET) are the same or different.
[0213]
8. ​The method of Annex 2, wherein
[0214]
​The indication information is used to indicate a frequency domain position of the control resource set
[0215]
8 ​A method according to Annex 2, wherein
[0216]
​The indication information indicates a frequency domain position of the control resource set based on a reference frequency domain location.
[0217]
9. ​The method according to Annex 8,
[0218]
​The indication information indicates that:
[0219]
​a frequency domain resource of the control resource set (CORESET) or a sub-band where a first predetermined resource in a frequency domain resource of the control resource set is located; and/or
[0220]
​a frequency domain resource of the control resource set (CORESET) or a frequency domain position of a second predetermined resource in a frequency domain resource of the control resource set (CORESET),
[0221]
​The first predetermined resource and the second predetermined resource are the same or different.
[0222]
10. ​The method of Annex 9, wherein
[0223]
​the indication information indicates a frequency domain resource of the control resource set (CORESET) or an index of a sub-band where the first predetermined resource in the control resource set (CORESET) is located; or
[0224]
​the indication information indicates a relative position of a subband in a frequency domain resource of the control resource set (CORESET) or a subband where the first predetermined resource in the control resource set (CORESET) is located and a subband where the frequency domain location of the first synchronization signal/physical broadcast channel block is located; or
[0225]
​The indication information indicates information related to a synchronization grating in a frequency domain resource of the control resource set (CORESET) or a sub-band in which the first predetermined resource in the control resource set (CORESET) is located.
[0226]
11. ​The method of Annex 10, wherein
[0227]
​The indication information indicates an offset value between a global synchronization channel number (GSCN) of a frequency domain resource of the control resource set (CORESET) or a global synchronization channel number (GSCN) of a second synchronization grating in a sub-band where the first predetermined resource is located, and a global synchronization channel number (GSCN) of a second synchronization grating corresponding to the first synchronization signal/physical broadcast channel block.
[0228]
12. ​The method of Annex 9, wherein
[0229]
​The indication information indicates a relative position of a frequency domain position of a second predetermined resource in the control resource set (CORESET) and a reference frequency position.
[0230]
13. ​The method of Annex 12, wherein
[0231]
​The reference frequency location is predefined or indicated by the network device.
[0232]
14. ​The method of Annex 13, wherein
[0233]
​the reference frequency location is a frequency domain location of a third predetermined resource of the first SSB, or a frequency domain location of a fourth predetermined resource of the second SSB, or a frequency domain resource of the control resource set (CORESET) or a frequency location of a first synchronization grating in a subband where a second predetermined resource in a frequency domain resource of the control resource set is located.
[0234]
15. ​The method of Annex 12, wherein
[0235]
​The relative position is the number of resource blocks and/or the number of subcarriers
[0236]
16. ​The method of Annex 2, wherein
[0237]
​The frequency domain location of each physical resource block of the first SSB and the frequency domain location of each physical resource block in the control resource set (CORESET) have a fixed mapping relationship.
[0238]
17. ​A signal transmission method, applied to a network device, the method comprising:
[0239]
​transmit a first synchronization signal/physical broadcast channel block (SSB) that is not located on the first synchronization grating; and
[0240]
​sending a physical downlink control channel (PDCCH), where the physical downlink control channel (PDCCH) is used to schedule a physical downlink shared channel (PDSCH) used to carry remaining minimum system information/system information block 1 (RMSI SIB 1).
[0241]
18. ​The method of Annex 17, wherein
[0242]
​sending the physical downlink control channel (PDCCH) on a resource of a control resource set (CORESET) associated with the first synchronization signal/physical broadcast channel block.
[0243]
19. ​The method of claim 18, wherein the method further comprises:
[0244]
​sending, by the network device, a measurement configuration to a terminal device, where the measurement configuration indicates that the terminal device obtains a frequency domain location of the first synchronization signal/physical broadcast channel block.
[0245]
20. ​The method of Annex 18, wherein
[0246]
​The relative position of the frequency domain position of the predetermined resource in the frequency domain resource of the control resource set (CORESET) and the frequency domain position of the first synchronization signal/physical broadcast channel block is a first predetermined value.
[0247]
21. ​The method of Annex 18, wherein
[0248]
​the relative position between the sub-band at the frequency domain resource of the control resource set (CORESET) and the sub-band in the frequency domain position of the first synchronization signal/physical broadcast channel block is a second predetermined value,
[0249]
​The frequency domain resource of the control resource set (CORESET) is located in the same sub-band, and the predetermined resource of the control resource set (CORESET) is located at a predetermined position in the sub-band.
[0250]
22. ​The method of Annex 21, wherein
[0251]
​In different sub-bands, the predetermined positions of the predetermined resources of the control resource set (CORESET) are the same or different.
[0252]
23. ​Method according to Annex 21 or 22,
[0253]
​In the same sub-band, for different subcarrier spacings, the predetermined positions of the predetermined resources of the control resource set (CORESET) are the same or different.
[0254]
24. ​The method of Annex 18, wherein
[0255]
​The first synchronization signal/physical broadcast channel block carries indication information, and the indication information is used to indicate a frequency domain position of the control resource set
[0256]
25. ​The method of Annex 18, wherein
[0257]
​The indication information indicates that:
[0258]
​a frequency domain resource of the control resource set (CORESET) or a sub-band where a first predetermined resource in a frequency domain resource of the control resource set is located; and/or
[0259]
​a frequency domain resource of the control resource set (CORESET) or a frequency domain position of a second predetermined resource in the control resource set (CORESET) in a sub-band,
[0260]
​The first predetermined resource and the second predetermined resource are the same or different.
[0261]
26. ​The method of Annex 25, wherein
[0262]
​the indication information indicates a frequency domain resource of the control resource set (CORESET) or an index of a sub-band where the first predetermined resource in the control resource set (CORESET) is located; or
[0263]
​the indication information indicates a frequency domain resource of the control resource set (CORESET) or a relative position of a sub-band where the first predetermined resource in the control resource set (CORESET) is located and a sub-band where the first synchronization signal/physical broadcast channel block is located; or
[0264]
​The indication information indicates information related to a synchronization grating corresponding to a sub-band where the first predetermined resource in the control resource set (CORESET) is located or a sub-band where the first predetermined resource in the control resource set (CORESET) is located.
[0265]
27. ​The method of Annex 26, wherein
[0266]
​The indication information indicates an offset value between a global synchronization channel number (GSCN) of a second synchronization grating in a frequency domain resource of the control resource set (CORESET) or a second synchronization raster of a second synchronization grating corresponding to the first synchronization signal/physical broadcast channel block in a frequency domain resource of the control resource set (CORESET) or a global synchronization channel number (GSCN) of a second synchronization grating corresponding to the first synchronization signal/physical broadcast channel block.
[0267]
28. ​The method of Annex 25, wherein
[0268]
​The indication information indicates a relative position of a frequency domain position of a second predetermined resource in the control resource set (CORESET) and a reference frequency position.
[0269]
29. ​The method of Annex 28, wherein the method further comprises:
[0270]
​The network device indicates the reference frequency location.
[0271]
30. ​The method of Annex 29, wherein
[0272]
​the reference frequency location is a frequency domain location of a third predetermined resource of the first SSB, or a frequency domain location of a fourth predetermined resource of the second SSB, or a frequency domain resource of the control resource set (CORESET) or a frequency location of a first synchronization grating in a subband where a second predetermined resource in a frequency domain resource of the control resource set is located.
[0273]
31. ​The method of Annex 28, wherein
[0274]
​The relative position is the number of resource blocks and/or the number of subcarriers
[0275]
32. ​The method of Annex 18, wherein
[0276]
​The frequency domain location of each physical resource block of the first SSB sent by the network device has a fixed mapping relationship with the frequency domain position of each physical resource block in the control resource set (CORESET).
​Claims
​[Claim 1]
​A signal transmission apparatus is applied to a terminal device, the apparatus includes a first transmission unit, and the first transmission unit is configured to: receive a first synchronization signal/physical broadcast channel block (SSB), where the first synchronization signal/physical broadcast channel block is not located on a first synchronization grating. And receive 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 SIB 1).
​[Claim 2]
​The apparatus according to claim 1, wherein the first transmission unit is further configured to determine, by the terminal device, a control resource set for transmitting the physical downlink control channel according to the frequency domain position of the first synchronization signal/physical broadcast channel block and/or indication information carried by the first synchronization signal/physical broadcast channel block before receiving the physical downlink control channel.
​[Claim 3]
​The apparatus of claim 2, wherein the relationship between the set of control resources and the frequency domain location of the first SSB is predefined.
​[Claim 4]
​The apparatus according to claim 2, wherein a relative position between a subband at a frequency domain resource of the control resource set (CORESET) and a subband at a frequency domain location of the first synchronization signal/physical broadcast channel block is a second predetermined value, wherein a frequency domain resource of the control resource set (CORESET) is located in the same subband, and a predetermined resource of the control resource set (CORESET) is located at a predetermined location within the subband.
​[Claim 5]
​The apparatus of claim 2, wherein the indication information is used to indicate a frequency domain position of the control resource set.
​[Claim 6]
​The apparatus according to claim 2, wherein the indication information indicates a frequency domain position of the control resource set based on a reference frequency domain location.
​[Claim 7]
​The apparatus according to claim 8, wherein the indication information indicates a frequency domain resource of the control resource set (CORESET) or a subband where a first predetermined resource in a frequency domain resource of the control resource set is located; and/or a frequency domain resource of the control resource set (CORESET) or a frequency domain location of a second predetermined resource in a frequency domain resource of the control resource set (CORESET), wherein the first predetermined resource and the second predetermined resource are the same or different.
​[Claim 8]
​The apparatus of claim 9, wherein the indication information indicates a relative position of a frequency domain location of a second predetermined resource in the control resource set (CORESET) to a reference frequency location.
​[Claim 9]
​The apparatus according to claim 8, wherein the reference frequency location is a frequency domain location of a third predetermined resource of the first SSB, or a frequency domain location of a fourth predetermined resource of the second SSB, or a frequency domain resource of the control resource set (CORESET) or a frequency location of a first synchronization grating in a subband where a second predetermined resource in a frequency domain resource of the control resource set is located.
​[Claim 10]
​The apparatus of claim 8, wherein the relative position is the number of resource blocks and/or the number of subcarriers.
​[Claim 11]
​The apparatus of claim 9, wherein the indication information indicates a frequency domain resource of the control resource set (CORESET) or an index of a sub-band in which the first predetermined resource in the control resource set (CORESET) is located. Or the indication information indicates a relative position of a sub-band in a frequency domain resource of the control resource set (CORESET) or a sub-band where the first predetermined resource in the control resource set (CORESET) is located and a sub-band where the frequency domain position of the first synchronization signal/physical broadcast channel block is located. Or the indication information indicates information related to a synchronization grating in a frequency domain resource of the control resource set (CORESET) or a sub-band in which the first predetermined resource in the control resource set (CORESET) is located.
​[Claim 12]
​The apparatus of claim 10, wherein the indication information indicates an offset value between a global synchronization channel number (GSCN) of a frequency domain resource of the control resource set (CORESET) or a global synchronization channel number (GSCN) of a second synchronization grating in a sub-band where the first predetermined resource is located, and a global synchronization channel number (GSCN) of a second synchronization grating corresponding to the first synchronization signal/physical broadcast channel block.
​[Claim 13]
​The apparatus according to claim 2, wherein a frequency domain position of each physical resource block of the first SSB and a frequency domain position of each physical resource block in the control resource set (CORESET) have a fixed mapping relationship.
​[Claim 14]
​A signal transmission apparatus, applied to a network device, the apparatus comprising a second transmission unit, wherein the second transmission unit is configured to: transmit a first synchronization signal/physical broadcast channel block (SSB) that is not located on a first synchronization grating; and send a physical downlink control channel (PDCCH), where 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 SIB 1).
​[Claim 15]
​The apparatus of claim 17, wherein the physical downlink control channel (PDCCH) is transmitted on resources of a control resource set (CORESET) associated with the first synchronization signal/physical broadcast channel block.
​[Claim 16]
​The apparatus of claim 18, wherein a relative position between a subband at a frequency domain resource of the control resource set (CORESET) and a subband at a frequency domain location of the first synchronization signal/physical broadcast channel block is a second predetermined value, wherein a frequency domain resource of the control resource set (CORESET) is located in the same subband, and a predetermined resource of the control resource set (CORESET) is located at a predetermined location within the subband.
​[Claim 17]
​The apparatus according to claim 18, wherein the first synchronization signal/physical broadcast channel block carries indication information, and the indication information is used to indicate a frequency domain position of the control resource set.
​[Claim 18]
​The apparatus according to claim 18, wherein the indication information indicates a frequency domain resource of the control resource set (CORESET) or a sub-band where a first predetermined resource in a frequency domain resource of the control resource set is located. And/or a frequency domain resource of the control resource set (CORESET) or a frequency domain position of a second predetermined resource in the control resource set (CORESET) in a subband, wherein the first predetermined resource and the second predetermined resource are the same or different.
​[Claim 19]
​The apparatus according to claim 18, wherein a frequency domain position of each physical resource block of the first SSB sent by the network device has a fixed mapping relationship with a frequency domain position of each physical resource block in the control resource set (CORESET).
​[Claim 20]
​A communication system, comprising: a terminal device having a transmission device of the signal according to any one of claims 1-13; and a network device having a transmission device of the signal according to any one of claims 14-19.