Signal transmission method, signal reception method, signal transmission device, signal reception device, and communication system

Abstract

The present invention provides a signal transmission method, a signal reception method, a transmission device, a reception device, and a communication system. [Solution] The transmitting device is installed in a network device, and the transmitting device includes a transmitting unit that transmits indication information to indicate that one of at least one information block transmitted by the network device within a time interval is to be transmitted on one of at least two candidate resources within the time interval. By indicating the transmission resource of the information block using the indication information, it is possible to clarify the transmission resource corresponding to the information block even if the default correspondence between the information block index and the transmission resource changes. In this way, the terminal device can achieve downlink synchronization.

Description

[Technical Field]

[0001] The present invention relates to the field of communications technology, and more particularly to a signal transmission method, a signal reception method, a signal transmission device, a signal reception device, and a communication system. [Background technology]

[0002] In the prior art, one synchronization signal / physical broadcast channel block (SS / PBCH Block, SSB) may have one primary synchronization signal (PSS), one secondary synchronization signal (SSS), and one physical layer broadcast channel (PBCH).

[0003] In one time interval, a network device can transmit multiple SSBs in beams with different directions, thereby increasing the coverage of the cell.

[0004] After the terminal device receives the SSB, it can use the SSB to perform time-frequency synchronization during the initial access phase, and can also perform radio resource management (RRM) and / or radio link monitoring (RLM).

[0005] It should be noted that the introduction of the above background art is intended to clearly and completely explain the technical solutions of the present invention and to facilitate understanding by those skilled in the art, and these technical solutions described in the background art of the present invention should not be construed as being known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0006] When a network device transmits multiple SSBs within a time interval, each SSB can be transmitted using default resources within the time interval, where the time interval is, for example, half a frame, and the length of the time interval is, for example, 5 milliseconds (ms).

[0007] Figure 1 shows the default transmission resource of each SSB in one half-frame. In Figure 1, the subcarrier spacing is assumed to be 30 kHz, and the carrier frequency is less than 3 GHz. In this case, the network device transmits a total of four SSBs in one half-frame, namely, SSB1, SSB2, SSB3, and SSB4, where 1, 2, 3, and 4 are the index values ​​of each SSB. The starting transmission resources of each SSB are, respectively, symbol 2 of slot 0, symbol 8 of slot 0, symbol 2 of slot 1, and symbol 8 of slot 1 in the half-frame. The network device transmits each SSB in increasing order of index value. According to Figure 1, there is a default correspondence between the SSB index value, the slot index, and the symbol index.

[0008] In the initial access phase, the terminal device blindly detects the SSBs, and after detecting one SSB, obtains the slot index and symbol index according to the SSB index value based on the subcarrier spacing and the default time-frequency resource position of the SSB index value, and also obtains the system frame number according to the PBCH in the SSB, so that the terminal device can achieve downlink time synchronization.

[0009] When communicating using an unlicensed band, a network device must perform LBT (Listen Before Talk) to detect whether the channel is idle before transmitting data. If the detection result shows that the channel is idle (i.e., the channel is in an idle state), data can be transmitted. If the channel is busy, the transmitting device must detect again. Once the channel is idle, data can be transmitted using the unlicensed band.

[0010] The inventors of the present invention have discovered that in an LBT scenario, the SSB transmission process may face new situations that need to be considered.

[0011] Figure 2 illustrates the transmission of SSBs during LBT. As shown in Figure 2, if the channel is busy before the default transmission resource of an SSB, that is, if the LBT fails, the SSB cannot be transmitted at the default time. If the LBT is successful, the transmission resource after the LBT can be used to transmit the SSB.

[0012] For example, in Figure 2, a cell has a total of four SSBs, namely, SSB1, SSB2, SSB3, and SSB4. Transmission resources 201, 202, 203, and 204 in Figure 2 are the default transmission resources for SSB1, SSB2, SSB3, and SSB4, respectively. Because LBT failed before transmission resources 201 and 202, transmission resources 201 and 202 cannot be used to transmit SSB1 and SSB2. Furthermore, because LBT succeeded before transmission resource 203, transmission resources 203 and 204 can be used to transmit SSBs.

[0013] The inventors of the present invention have found that, on the one hand, when SSB3 and SSB4 are transmitted using the transmission resources 203 and 204 in Fig. 2, SSB1 and SSB2 cannot be transmitted, i.e., the SSB transmission is incomplete, which may result in users within the coverage of the beam for transmitting SSB1 and SSB2 not receiving the SSBs and being unable to access the cell; and for users in a connected state, the incomplete transmission of the SSBs in the cell may cause errors in the calculation results for the user's cell quality, which may ultimately affect the results of cell reselection; on the other hand, when the transmission resources 203 and 204 are used to transmit SSB3 and SSB4, SSB1 and SSB2 cannot be transmitted, i.e., the SSB transmission is incomplete, which may result in users within the coverage of the beam for transmitting SSB1 and SSB2 not receiving the SSBs and being unable to access the cell; and for users in a connected state, the incomplete transmission of the SSBs in the cell may cause errors in the calculation results for the user's cell quality, which may ultimately affect the results of cell reselection; When transmitting all SSBs of the cell, i.e., SSB1, SSB2, SSB3, and SSB4 in sequence using resources 4 and thereafter, the default correspondence between SSB indexes and transmission resources may change. That is, according to the default correspondence, transmission resource 203 is used to transmit SSB3, but to transmit all SSBs, resource 203 is used to transmit SSB1. As a result, the terminal device may not be able to achieve downlink synchronization based on the above-mentioned default correspondence during the initial access process.

[0014] An embodiment of the present invention provides a signal transmission method, a reception method, a transmission device, a reception device and a communication system, and by indicating the transmission resource of an information block using indication information, even if the default correspondence between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified, thereby allowing the terminal device to achieve downlink synchronization. [Means for solving the problem]

[0015] According to a first aspect of an embodiment of the present invention, there is provided a transmitting device installed in a network device, the transmitting device comprising: The network device includes a transmitting unit for transmitting indication information for indicating that one information block of at least one information block transmitted by the network device within one time interval is to be transmitted on one candidate resource of at least two candidate resources during the one time interval.

[0016] According to a second aspect of the present invention, there is provided a signal receiving device installed in a terminal device, the receiving device comprising: a receiving unit for receiving indication information of a network device transmission, the indication information indicating that an information block transmitted by the network device within a time interval is to be transmitted on one candidate resource among at least two candidate resources during the time interval; and A calculation unit for time synchronization based on the instruction information is included.

[0017] According to a third aspect of an embodiment of the present invention, there is provided a communication system, the communication system including a terminal device and a network device, the network device including a transmitting device according to the first aspect of the embodiment described above, and the terminal device including a receiving device according to the second aspect of the embodiment described above.

[0018] The advantageous effects of the embodiment of the present invention are as follows: by indicating the transmission resource of the information block using the indication information, the transmission resource corresponding to the information block can be clarified even if the default correspondence between the information block index and the transmission resource changes.

[0019] The following description and reference to the drawings disclose in detail particular embodiments of the present invention and show how the principles of the present invention may be employed, but the present invention is not limited in scope to these embodiments, which may include various changes, modifications, and alternatives within the scope of the appended claims.

[0020] Furthermore, features described and / or shown in one implementation may be used in the same or similar manner in one or more other embodiments, combined with features in the other embodiments, or substituted for features in the other embodiments.

[0021] It should be noted that terms such as "comprise / have" when used in this specification refer to the presence of a feature, element, step or assembly, but do not exclude the presence or addition of one or more other features, elements, steps or assemblies. [Brief explanation of the drawings]

[0022] Elements and features described in one drawing or one embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like symbols are used to indicate corresponding parts in several drawings and to indicate corresponding parts used in several embodiments.

[0023] The included drawings are used to provide a further understanding of the embodiments of the present invention, and these drawings constitute a part of this specification, illustrate embodiments of the present invention, and together with the written description, serve to explain the principles of the present invention. Also, it is apparent that the drawings described below are only for illustrating some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without any creative effort. [Figure 1] A diagram showing the default transmission resources of each SSB in one half frame. [Figure 2] A diagram showing transmitting SSB in the case of LBT. [Figure 3] 1 is a diagram illustrating a communication system of the present invention. [Figure 4] FIG. 1 is a diagram illustrating a signal transmission method. [Figure 5] FIG. 10 is a diagram showing candidate starting symbols in the first implementation method. [Figure 6] FIG. 10 is a diagram showing each candidate starting symbol. [Figure 7] FIG. 10 is a diagram showing a predetermined mapping relationship between information blocks. [Figure 8] FIG. 1 illustrates preconfigured time-frequency resources. [Figure 9] A diagram showing the use of relative relationships between SSB and other signals or channels to represent instruction information. [Figure 10] A diagram showing a first time-frequency resource and candidate resources. [Figure 11] FIG. 10 is another diagram illustrating a first time-frequency resource and candidate resources. [Figure 12] FIG. 10 is a diagram illustrating a signal receiving method according to a second embodiment of the present invention. [Figure 13] FIG. 10 is a diagram illustrating a signal transmitting device according to a third embodiment. [Figure 14] FIG. 10 is a diagram illustrating a signal receiving device according to a fourth embodiment. [Figure 15] FIG. 2 is a configuration diagram of a terminal device according to an embodiment of the present invention. [Figure 16] FIG. 1 is a configuration diagram of a network device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The foregoing and other features of the present invention will become apparent from a consideration of the accompanying drawings and the following description. While the specification and drawings disclose particular embodiments of the present invention, they represent only some of the embodiments which may employ the principles of the present invention. It is to be understood that the present invention is not limited to the described embodiments, but rather includes all modifications, variations, and alternatives which fall within the scope of the appended claims.

[0025] In embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as LTE (Long Term Evolution), LTE-A (LTE-Advanced), WCDMA (Wideband Code Division Multiple Access), HSPA (High-Speed ​​Packet Access), etc.

[0026] Additionally, communication between devices in a communication system may occur according to any stage of communication protocol, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR), and / or other conventional or future-developed communication protocols.

[0027] In the embodiments of the present invention, the term "network device" refers to a device in a communication system that connects a terminal device to a communication network and provides services to the terminal device, for example, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0028] 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 (gNB), and may further include a Remote Radio Head (RRH), a Remote Radio Unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). The term "base station" may include some or all of the functions thereof, and each base station can provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and / or the area it covers, depending on the context of the term.

[0029] In embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives services from the network, for example, via a network device. A 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.

[0030] Among these, user devices may include, but are not limited to, cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, portable devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smart watches, digital cameras, etc.

[0031] Furthermore, for example, in a scenario such as IoT (Internet of Things), the user equipment may also be a monitoring or measuring device or apparatus, including, but not limited to, the following: a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, a D2D (Device to Device) terminal, an M2M (Machine to Machine) terminal, etc.

[0032] Although the following describes the scenario of the embodiment of the present invention by way of an example, the present invention is not limited thereto.

[0033] 3 is a diagram showing a communication system according to the present invention, and will be described using a terminal device and a network device as an example. As shown in FIG. 3, the communication system 300 may include a network device 301 and a terminal device 302 (for convenience, only one terminal device will be used as an example in FIG. 3).

[0034] In an embodiment of the present invention, conventional or future services may be performed between the network device 301 and the terminal device 302. For example, these services may include, but are not limited to, enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), Ultra-Reliable and Low-Latency Communication (URLLC), etc.

[0035] Wherein, the terminal device 302 can transmit data to the network device 301, for example, using a grant or grant-free transmission method. The terminal device 301 can receive data transmitted by one or more terminal devices 302, and can also feed back information, such as acknowledged ACK / not acknowledged NACK information, to the terminal device 302. The terminal device 302 can determine the end of the transmission process and transmit new data or retransmit data according to the feedback information.

[0036] In addition, before the terminal device 302 accesses the network device 301, the network device 301 can send information regarding system information to the terminal device 302, and the terminal device 302 can realize downlink synchronization by detecting the received information and establish a connection with the network device 301.

[0037] In the following description, a network device in a communication system is used as a transmitting end and a terminal device is used as a receiving end, but the present invention is not limited to this, and the transmitting end and / or the receiving end may be other devices. For example, the present invention can be applied not only to signal transmission between a network device and a terminal device, but also to signal transmission between two terminal devices.

[0038] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [Example]

[0039] A first embodiment of the present invention provides a signal transmission method, which can be performed by a network device.

[0040] FIG. 4 is a diagram showing a signal transmission method, and as shown in FIG. 4, the method includes the following steps:

[0041] Step 401: A network device transmits instruction information to instruct the network device that one of at least one information block to be transmitted within one time interval is to be transmitted on one candidate resource of at least two candidate resources during the one time interval.

[0042] According to this embodiment, by indicating the transmission resource of the information block using instruction information, the resource for transmitting the information block can be clarified even if the one-to-one correspondence between the information block index and the transmission resource changes, thereby enabling the terminal device to achieve downlink synchronization.

[0043] In this embodiment, one time interval may be, for example, half a frame, and the length of one time interval may be, for example, 5 milliseconds (ms).

[0044] In this embodiment, one information block may include at least a synchronization signal / physical broadcast channel block (SS / PBCH Block, SSB). For example, the information block may be an SSB; or the information block may include other information in addition to the SSB. For example, the other information may be a control resource set 0 and / or a physical layer shared channel carrying system information block 1 (SIB1).

[0045] In this embodiment, an information block group including a predetermined number of information blocks that the network device needs to transmit in one time interval of a cell is referred to as the information block group of the cell. The predetermined number is a default value, or a value determined based on the subcarrier spacing and / or the carrier frequency. For example, when the subcarrier spacing is 15 kHz and the carrier frequency is less than 3 GHz, the information block group may have four information blocks, and the index values ​​of the SSBs in each information block are different from each other. Furthermore, the index values ​​of each information block may or may not be equal to the index values ​​of the SSBs in the information block.

[0046] In this embodiment, the network device can communicate using an unlicensed band, for example, the network device can perform LBT detection before transmitting an information block in the one time interval, and start transmitting an information block group after the LBT is successful.

[0047] In one implementation, the network device either completely transmits an information block group or does not transmit any information blocks within a time interval; that is, after successful LBT, it transmits all information blocks in the information block group; if it cannot completely transmit all information blocks in the information block group, it does not transmit any information blocks. For example, if an information block group of a cell contains four information blocks, and after successful LBT, it transmits all four information blocks in the information block group, and if it cannot completely transmit the four information blocks within the time interval using the remaining resources, the network device does not transmit any information blocks within the time interval. Also, for example, if LBT detection has always failed and it is not possible to completely transmit the four information blocks within the time interval using the remaining resources, the network device stops LBT detection and does not transmit any information blocks within the time interval.

[0048] In another implementation, the network device transmits some or no information blocks in an information block group in a time interval. For example, if an information block group of a cell includes four information blocks and, after successful LBT, only one information block can be transmitted using the remaining resources in the time interval, the network device transmits only one information block (e.g., the first information block, the last information block, etc.) in the information block group. If all LBT detections within the time interval fail, the network device does not transmit any information blocks within the time interval. In this implementation, the network device also transmits one control information, which indicates which information blocks in the information block group the network device has not transmitted within the time interval, or which is used to instruct the terminal device not to report measurement results within the time interval, and the measurement results are one of radio resource management (RRM), radio link measurement, and channel condition measurement. The control information can be one common control information, that is, all terminal devices served by the cell can receive the common control information, or it can be one set of common control information, that is, only one set of terminal devices served by the cell can receive the control information. In this implementation, if there are resources to transmit an information block within a time interval, the network device will transmit the information block, thereby increasing the possibility of the terminal device accessing; and by notifying the terminal device through control information that an information block within a time interval has not been completely transmitted, the measurement error of the terminal device in a connected state can be effectively avoided.

[0049] According to this embodiment, in a time interval, each information block has at least two candidate resources for transmitting the information block, and the information block can be transmitted on one of the at least two candidate resources. The number and time-frequency location of the candidate resources of each information block can be preset. Since each information block can have at least two candidate resources, if some candidate resources are not used to transmit the information block due to LBT failure, the information block can still be transmitted using other candidate resources. Therefore, by increasing the possibility of transmitting the information block, the possibility of completely transmitting all information blocks in the cell can be improved. Furthermore, by using indication information to indicate the candidate resource for actually transmitting the information block, it is possible to clarify which candidate resource the information block is transmitted on and accurately obtain the time-frequency information of the candidate resource.

[0050] In this embodiment, the indication information may be carried in an information block transmitted by the network device. In this way, the network device can transmit the indication information when transmitting the information block, i.e., step 401 is realized by the network device transmitting the information block. Alternatively, the indication information may be carried in other information, i.e., the network device may transmit the indication information by further performing step 401 in addition to performing the operation of transmitting the information block.

[0051] The candidate resources and instruction information of this embodiment will be further described below.

[0052] In the first embodiment, each information block may have at least two candidate resources.

[0053] In this embodiment, the time domain intervals between each candidate starting symbol may be equal or unequal, and each candidate starting symbol may be an OFDM symbol having a predetermined index value within a time interval, where the time domain interval may be an integer number of OFDM symbols, an integer number of subframes, milliseconds, or the information block.

[0054] In this embodiment, the indication information includes identification (ID) information of one of the at least two candidate start symbols of the first information block of the at least one information block, where the first information block may refer to the information block with the smallest index value in the information block group.

[0055] For example, when the time domain intervals of adjacent candidate start symbols are equal, the identification information of the candidate start symbol may be the number of the time domain intervals between the candidate start symbol and a first candidate start symbol, and thus the index value of the candidate start symbol among all symbols in the one time interval can be determined based on the number of the time domain intervals, the size of the time domain intervals, and the first candidate start symbol among the candidate start symbols. Alternatively, when the identification information of the candidate start symbol is an OFDM symbol having a predetermined index value within a time interval, the identification information of the candidate start symbol may be the sequential number of the candidate start symbol among all candidate start symbols.

[0056] Figure 5 shows the candidate start symbols in the first implementation. As shown in Figure 5, the information block group includes four information blocks, namely, information block 0, information block 1, information block 2, and information block 3. Among them, information block 0 is the first information block.

[0057] As shown in FIG. 5, information block 0 has five candidate start symbols, which are start symbols 0 to 4, respectively.

[0058] The network device can perform LBT detection before each candidate start symbol, and when the channel is idle and the LBT is successful, the network device starts transmitting the first information block from the candidate start symbol, and the indication information is set to the identification information of the candidate start symbol from which the first information block starts to be transmitted.

[0059] In this embodiment, after transmitting the first information block, the network device may continue to transmit other information blocks according to the order of the index values ​​of the information blocks, for example, the order of the index values ​​of the information blocks may be arranged from smallest to largest index values.

[0060] For example, in Figure 5, since the network device detects the success of the LBT before candidate start symbol 2, the network device transmits information blocks 0 to 3 sequentially starting from candidate start symbol 2, and also uses the identification information of candidate start symbol 2 as instruction information.

[0061] In one way of transmitting each information block, each information block may have a predetermined mapping relationship, that is, the relative positions of the start symbols of different information blocks have a predetermined value. Therefore, after detecting an information block, the terminal device can achieve time synchronization based on the identification information of the candidate start symbol transmitted by the network device and the predetermined mapping relationship between each information block.

[0062] In one specific example, for example, the predetermined mapping relationship can be set based on the default correspondence relationship between each information block and transmission resource shown in Figure 1, that is, in the default correspondence relationship, each information block corresponds to a transmission resource, and the relative position relationship between the transmission resources of each information block is also set.

[0063] For example, when the time domain intervals of adjacent candidate start symbols are equal, the identification information of the candidate start symbol is the number of time domain intervals between the candidate start symbol and the first candidate start symbol. If the time domain interval between adjacent candidate start symbols is four symbols, the terminal device detects information block 3, the indication information is candidate start symbol 2, and the number of time domain intervals between the first candidate start symbol and the candidate start symbol is two, then in the default correspondence relationship (i.e., the default relationship when transmitting the information block group from the first candidate start symbol), when the start symbol of the resource for transmitting information block 3 is symbol 6 of slot 1, the terminal device adds 2×4=8 (i.e., the number of time domain intervals × the length of the time domain interval) symbols based on the symbol index value in the default correspondence relationship, thereby determining the index of the first symbol of the resource for actually transmitting information block 3 and the index of the slot where the symbol is located, and achieving downlink synchronization.

[0064] Also, for example, when the identification information of a candidate start symbol is the sequential number of the candidate start symbol among all the candidate start symbols, each candidate start symbol is, for example, as shown in FIG. 6, an OFDM symbol whose index values ​​within one time interval are defined as 4, 8, 16, 20, and 31, respectively (i.e., symbols 4 and 8 in slot 0, symbols 2 and 6 in slot 1, and symbol 4 in slot 2 in the time interval), and the magnitude of the indication information is 3 bits, indicating one of 0-4 candidate start symbols. If the terminal device detects information block 3, and the three bits of the indication information are '000', indicating the sequence number 0 of all candidate start symbols of the candidate start symbol, the terminal device will determine, based on the sequence number 0, that the index value of the first symbol of the resource that actually transmits information block 0 is 4, and based on the default relationship between information block 3 and information block 0, will determine the OFDM symbol index value of the first symbol of information block 3 and the index of the slot where the symbol is located, thereby achieving downlink synchronization.

[0065] In another specific example, the predetermined mapping relationship can be expressed by directly setting the symbol numbers between the resources of different information blocks.

[0066] For example, Figure 7 shows the predetermined mapping relationship of each information block. As shown in Figure 7, in the information block group, the resources of information block 0 and information block 1 are continuous, with no symbols between them, the resources of information block 1 and information block 2 are separated by four symbols, and the resources of information block 2 and information block 3 are continuous, with no symbols between them.

[0067] As shown in Figure 7, when the network device detects that the channel is idle at candidate start symbol 1, it transmits each information block in the information block group according to the number of symbols between candidate start symbol 1 and each predetermined information block for the information block group, and after detecting an information block, the terminal device can achieve time synchronization based on the identification information of the candidate start symbol transmitted by the network device and the number of symbols between the resources of different information blocks. Note that the specific method can be referred to in the previous example, and detailed description thereof will be omitted here.

[0068] In another manner of transmitting each information block, each information block can be transmitted on a preset time-frequency resource. For example, an integer number (for example, two or more) of time-frequency resources for transmitting information blocks within a time interval can be predefined, and each time-frequency resource has a one-to-one correspondence with time. Among the integer number (for example, two or more) of time-frequency resources, the start symbols of the first N time-frequency resources can be set as candidate start symbols, that is, N candidate start symbols are predefined, where N is a natural number greater than 1. Starting from one candidate start symbol, the information blocks in an information block group are sequentially transmitted on the time-frequency resources corresponding to the number of consecutive information blocks from the candidate start symbol.

[0069] Figure 8 shows the pre-configured time-frequency resources. As shown in Figure 8, 80 to 87 are time-frequency resources for transmitting eight pre-configured information blocks within one time interval, and candidate start symbols 0 to 4 correspond to the start symbols of time-frequency resources 80 to 84, respectively. Among them, candidate start symbol 0 is, for example, symbol 4 of slot 0 within the time interval.

[0070] As shown in Figure 8, the network device can transmit an information block group starting from candidate start symbol 1, that is, four information blocks 0, 1, 2, and 3 in the information block group are transmitted on time-frequency resources 81, 82, 83, and 84, respectively. After receiving information block 2, for example, the terminal device can determine, based on the indication information (i.e., the start symbol for transmitting the information block group is candidate start symbol 1), on which pre-configured time-frequency resource in the time interval the information block 2 is transmitted, for example, 2 + 1 = 3 (i.e., the index value of the information block + the identification information of the candidate start symbol = the sequence number of the time-frequency resource), and can achieve downlink synchronization based on the one-to-one correspondence between the third time-frequency resource 83 and time.

[0071] In the first implementation, the indication information may be carried in the Master Information Block (MIB) of the PBCH in the information block transmitted by the network device, or may be carried in System Information Block 1 (SIB1).

[0072] In this embodiment, the indication information can also be expressed as a relative relationship between the SSB and other signals or channels in the information block transmitted by the network device, and the relative relationship can be, for example, a time domain or frequency domain mapping relationship. That is, different relative relationships between the SSB and other signals or channels can indicate different candidate starting symbol identification information. The other signals or channels can be channels or signals included in the information block, such as control resource set 0 or channel state information reference signals (CSI-RS) in the information block.

[0073] 9 is a diagram illustrating the use of a relative relationship between an SSB and another signal or channel to indicate indication information. As shown in FIG. 9, the PBCH payload may include first indication information for indicating the time-frequency resources of control resource set 0 (CORESET 0). In FIG. 9, when the minimum frequency-domain resource block index of control resource set 0 in the PBCH payload indication in an information block (e.g., information block 0) is greater than the maximum frequency-domain index among the resource blocks occupied by an SSB (e.g., SSB 0) in the information block, it indicates that the information block is transmitted on candidate resource 1 (e.g., the start symbol is candidate start symbol 1); and when the maximum frequency-domain index of control resource set 0 in the PBCH payload indication in an information block is less than the minimum frequency-domain index among the resource blocks occupied by an SSB (e.g., SSB 3) in the information block, it indicates that the information block is transmitted on candidate resource 2 (e.g., the start symbol is candidate start symbol 1). The terminal device can determine the candidate resource according to the relative relationship between the control resource set 0 and the SSB, and can achieve downlink synchronization by determining the transmission symbol and slot index of the received information block.

[0074] 9, after the LBT is successful, the information blocks are transmitted in the order of information block 2, information block 3, information block 0, and information block 1. However, this is not limited to this, and after the LBT is successful, the information blocks may be transmitted in the order of information block 0, information block 1, information block 2, and information block 3.

[0075] In a second embodiment, a time interval may include first time-frequency resources for transmitting an integer number of pre-configured information blocks, each of which may have one or more symbols, and the number of the integer number of pre-configured first time-frequency resources in a time interval may be greater than the number of information blocks in the information block group of the cell.

[0076] In this embodiment, the at least two candidate resources are at least two first time-frequency resources for transmitting information blocks with the same index value indicator (ID) among the integer number of first time-frequency resources, that is, information blocks with the same index value indicator (e.g., information block 2) can be transmitted on at least two first time-frequency resources, and the at least two time-frequency resources are at least two candidate resources for the information block (e.g., information block 2).

[0077] In one specific example, the indication information includes identification information of one candidate resource among the at least two candidate resources that actually transmits the information block.

[0078] 10 is a diagram illustrating first time-frequency resources and candidate resources. As shown in FIG. 10, each candidate resource corresponds to one time-frequency resource. Each information block (e.g., any one of information blocks 0 to 3) has two candidate resources (i.e., candidate resource 1 and candidate resource 2), of which the four candidate resources 1 in FIG. 10 can constitute candidate resource group 1, and the four candidate resources 2 can constitute candidate resource group 2.

[0079] As shown in the dark-colored information blocks in Figure 10, after the LBT is successful, the network device transmits each information block in the order of information block 2, information block 3, information block 0, and information block 1, and the indication information of each information block includes identification information of at least two candidate resources of the information block for transmitting the information block. For example, for information block 3, the indication information is "1", which identifies candidate resource 1 of the two candidate resources (i.e., candidate resource 1 and candidate resource 2) of information block 3, and for information block 0, the indication information is "2", which identifies candidate resource 2 of the two candidate resources (i.e., candidate resource 1 and candidate resource 2) of information block 0.

[0080] In this specific example, the terminal device can achieve downlink synchronization based on the correspondence between the candidate transmission positions and time. For example, if the terminal device detects information block 1 in Figure 10 and the indication information indicates that the information block is transmitted on candidate resource 2 of the candidate resources, the terminal device can achieve downlink synchronization based on the starting symbol and slot sequence number of information block 1 of candidate resource 2.

[0081] For example, in the specific example corresponding to Figure 10, the indication information may be carried in the Master Information Block (MIB) of the PBCH in the information block transmitted by the network device, or may be carried in System Information Block 1 (SIB1); or the indication information may be expressed as the relative relationship between the SSB and other signals or channels in the information block transmitted by the network device, that is, different relative relationships between the SSB and other signals or channels may represent different complementary resource identification information. For a specific description, please refer to the description of Figure 9.

[0082] In another specific example of the second implementation scheme, the indication information may include identification information of the integer number of first time-frequency resources corresponding to one candidate resource for actually transmitting the information block.

[0083] 11 is another diagram showing first time-frequency resources and candidate resources. As shown in FIG. 11, it is assumed that eight first time-frequency resources are preset in one time interval, with their identification information being 0 to 7, respectively, and each candidate resource corresponds to one time-frequency resource. For each information block (e.g., any one of information blocks 0 to 3), there are two candidate resources. For example, first time-frequency resources 0 and 4 are candidate resources for information block 0, first time-frequency resources 1 and 5 are candidate resources for information block 1, first time-frequency resources 2 and 6 are candidate resources for information block 2, and first time-frequency resources 3 and 7 are candidate resources for information block 3.

[0084] As shown by the dark-colored information blocks in Figure 11, after the LBT is successful, the network device transmits each information block in the order of information block 2, information block 3, information block 0, and information block 1, and the indication information of each information block includes identification information of the first time-frequency resource corresponding to the candidate resource for transmitting the information block. For example, for information block 3, the indication information is "3", which identifies the first time-frequency resource 3 for transmitting information block 3, and for information block 0, the indication information is "4", which identifies the first time-frequency resource 4 for transmitting information block 0.

[0085] In this specific example, the terminal device can achieve downlink synchronization based on the identification information of the first time-frequency resource and the time correspondence relationship, and the terminal device can further obtain the index value of the received information block by performing a mod (modulus) operation on the identification information of the first time-frequency resource and the number of information blocks in the information block group of the cell.

[0086] For example, if a terminal device detects a transmitted information block as shown in Fig. 11 and determines, according to the DMRS and / or PBCH payload, that the candidate resource for transmitting the information block is the first time-frequency resource 5, the terminal device can achieve downlink synchronization by obtaining the corresponding symbol and slot index according to the first time-frequency resource 5. In addition, the terminal device can further determine, according to the carrier frequency and / or subcarrier spacing, that the number of information blocks included in the cell information block group is L = 4, or that the default number of information blocks included in the information block group of the unlicensed band cell is L = 4, thereby determining that the index of the information block is 5 mod 4 = 1, and can perform measurement functions such as RRM and RLM using the information block index 1.

[0087] For example, in the specific example corresponding to Figure 11, the indication information may be indicated by a demodulation reference signal (DMRS) sequence of a physical broadcast channel (PBCH) in the information block and / or a payload of the physical broadcast channel (PBCH). For example, when the identification information of the first time-frequency resource is equal to or less than 8, the indication information may be indicated by the DMRS or the PBCH, and when the identification information of the first time-frequency resource is greater than 8, the indication information may be indicated by both the DMRS and the PBCH.

[0088] According to this embodiment, by using the indication information to indicate the transmission resource of the information block, even if the default correspondence relationship between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified. In this way, the terminal device can achieve downlink synchronization. [Example]

[0089] The second embodiment provides a signal receiving method, which is executed by a terminal device.

[0090] 12 is a diagram illustrating a signal receiving method according to Example 2 of the present invention. As shown in FIG. 12, the method includes the following steps.

[0091] Step 1201: A terminal device receives indication information from a network device to indicate that an information block transmitted by the network device and received by the terminal device is transmitted on one of at least two candidate resources in one time interval; and Step 1202: The terminal device performs time synchronization based on the instruction information.

[0092] In this embodiment, the information block includes at least a synchronization signal / physical broadcast channel block (SS / PBCH Block, SSB).

[0093] In a first implementation manner of this embodiment, the network device transmits at least one information block in a time interval, and the at least one information block includes the information block received by the terminal device, and in this implementation manner, each information block of the at least one information block may have at least two candidate resources.

[0094] For an explanation of the first embodiment method, please refer to the description of the first embodiment method in the first embodiment. Only the outline thereof will be explained below.

[0095] In this implementation, the indication information is used to indicate that the candidate start symbol of the first information block of the at least one information block is one of the at least two candidate start symbols, for example, the indication information includes indicator information of the one candidate start symbol.

[0096] In this implementation, the time domain intervals of adjacent candidate starting symbols are equal, and the unit of the time domain interval is one of OFDM symbols, subframes, milliseconds, and the information blocks.

[0097] In this implementation, the terminal device performs time synchronization based on the indication information, the length of the time domain interval, and the index value of the one information block.

[0098] In this implementation, the indicator information of the one candidate start symbol includes indicator information of an OFDM symbol at a predetermined index value in the one time interval, and the terminal device performs time synchronization according to the indicator information and the index value as the one information block.

[0099] In this implementation method, the network device can sequentially transmit the at least one information block from the one candidate starting symbol on a predetermined time-frequency resource for transmitting the information block within the one time interval, and in this case, the terminal device further needs to achieve time synchronization using the relationship between the predetermined time-frequency resource and time.

[0100] In this implementation method, the network device can also transmit the at least one information block from the one candidate starting symbol according to a predetermined mapping relationship between the at least one information block, and in this case, the terminal device further needs to achieve time synchronization based on the predetermined mapping relationship.

[0101] In this embodiment, the indication information is carried in the Master Information Block (MIB) of the PBCH, or in System Information Block 1 (SIB1), or the indication information is expressed as a relative time domain or frequency domain mapping relationship between the SSB and other signals or channels in the information block.

[0102] In a second implementation manner of this embodiment, one time interval includes an integer number of first time-frequency resources for transmitting information blocks, and the at least two candidate resources are at least two of the first time-frequency resources for transmitting the information blocks with the same index value indicator among the integer number of first time-frequency resources. In this implementation manner, the terminal device can achieve time synchronization according to the correspondence between the indication information and time.

[0103] For an explanation of the second embodiment method, please refer to the description of the second embodiment method in Example 1. Only an outline thereof will be explained below.

[0104] In one specific example of the implementation manner, the indication information may include identification information of the one candidate resource among the at least two candidate resources.

[0105] In this example, the terminal device determines a first time-frequency resource for transmitting the information block based on the identification information of the candidate resource and the index value of the received information block, and then determines the starting symbol and slot sequence number of the first time-frequency resource, thereby achieving downlink synchronization.

[0106] In this example, the indication information is carried in the Master Information Block (MIB) of the PBCH, or in System Information Block 1 (SIB1), or the indication information is expressed as a relative time domain or frequency domain mapping relationship between the SSB and other signals or channels in the information block.

[0107] In another specific example of this implementation manner, the indication information may include identification information of the integer number of first time-frequency resources of the first time-frequency resources corresponding to one candidate resource.

[0108] In this example, the terminal device determines the first time-frequency resource for transmitting the information block according to the identification information of the first time-frequency resource, and determines the start symbol and slot sequence number of the first time-frequency resource, thereby achieving downlink synchronization. In addition, in this example, the terminal device can further obtain the index value of the received signal block according to the indication information and the number of information blocks included in the information block group of the cell, and can obtain the index value of the information block by, for example, performing a mod operation on both.

[0109] In this example, the indication information may be indicated by the DMRS sequence of the PBCH and / or the PBCH payload of the one information block.

[0110] According to this embodiment, by using the indication information to indicate the transmission resource of the information block, even if the default correspondence relationship between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified. In this way, the terminal device can achieve downlink synchronization. [Example]

[0111] This embodiment 3 provides a signal transmitting device, which is installed in a network device. The principle of solving the problem by this device is similar to that of the method of embodiment 1, so the specific implementation can refer to the implementation of the method of embodiment 1, and the repeated description of the same content will be omitted here.

[0112] 13 is a diagram showing a signal transmitting device of Example 3. As shown in FIG. 13, the device 1300 includes:

[0113] A transmitting unit 1301: transmits indication information to indicate that one information block among at least one information block transmitted by the network device within one time interval is to be transmitted on one candidate resource among at least two candidate resources in the one time interval.

[0114] In this embodiment, the information block includes at least a synchronization signal / physical broadcast channel block (SS / PBCH Block, SSB).

[0115] In this embodiment, the indication information includes identification information of one of at least two candidate starting symbols of a first information block of the at least one information block.

[0116] In this embodiment, the time domain intervals of adjacent candidate starting symbols are equal, and the unit of the time domain interval is one of an OFDM symbol, a subframe, a millisecond, and the information block.

[0117] In this embodiment, the candidate starting symbol is an OFDM symbol of a predetermined index value within the one time interval.

[0118] In this embodiment, the network device transmits at least one information block within the one time interval in the following manner: from the one candidate resource, the network device transmits the at least one information block in sequence on a predetermined time-frequency resource for transmitting information blocks within the one time interval.

[0119] In this embodiment, the network device transmits at least one information block within the one time interval in the following manner: the network device transmits the at least one information block according to a predetermined mapping relationship between the candidate starting symbol and the at least one information block.

[0120] In this embodiment, the one time interval includes an integer number of first time-frequency resources, the first time-frequency resources are used to transmit the information block, and the at least two candidate resources are at least two of the first time-frequency resources for transmitting the information block of the same index value indicator among the integer number of first time-frequency resources.

[0121] In this embodiment, the indication information includes identification information of the one candidate resource among the at least two candidate resources.

[0122] In this embodiment, the indication information includes identification information of the integer number of first time-frequency resources of the first time-frequency resources corresponding to the one candidate resource.

[0123] In this embodiment, the indication information is carried in the Master Information Block (MIB) of the PBCH in one information block, or in System Information Block 1 (SIB1).

[0124] In this embodiment, the indication information is expressed as a relative time domain or frequency domain mapping relationship between SSBs and other signals or channels in the information block.

[0125] In this embodiment, the indication information is indicated by the DMRS sequence of the PBCH and / or the PBCH payload in the one information block.

[0126] For a detailed description of this embodiment, the description of the corresponding steps in the first embodiment can be referred to, and the detailed description thereof will be omitted here.

[0127] According to this embodiment, by using the indication information to indicate the transmission resource of the information block, even if the default correspondence relationship between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified. In this way, the terminal device can achieve downlink synchronization. [Example]

[0128] This embodiment 4 provides a signal receiving device, which is installed in a terminal device. The principle of solving the problem by this device is similar to that of the method of embodiment 2, so the specific implementation can refer to the implementation of the method of embodiment 2, and the repeated description of the same content will be omitted here.

[0129] 14 is a diagram showing a signal receiving device of the present embodiment 4. As shown in FIG. 14, the device 1400 includes:

[0130] A receiving unit 1401: receives indication information for indicating that an information block transmitted by a network device and received by the terminal device is transmitted on one of at least two candidate resources within the one time interval; and A calculation unit 1402: performs time synchronization based on the instruction information.

[0131] In this embodiment, the information block includes at least a synchronization signal / physical broadcast channel block (SS / PBCH Block, SSB).

[0132] In this embodiment, the network device transmits at least one information block during the one time interval, and the at least one information block includes the one information block.

[0133] In this embodiment, the indication information includes indicator information of one of the at least two candidate starting symbols of the first information block.

[0134] In this embodiment, the time domain intervals of adjacent candidate starting symbols are equal, and the unit of the time domain interval is one of an OFDM symbol, a subframe, a millisecond, and the information block.

[0135] In this embodiment, the calculation unit performs time synchronization according to the indication information, the length of the time domain interval, and the index value of one information block.

[0136] In this embodiment, the candidate start symbol is an OFDM symbol of a predetermined index value in the one time interval, and the calculation unit performs time synchronization based on the indication information and the index value of the one information block.

[0137] In this embodiment, the network device sequentially transmits the at least one information block from the one candidate starting symbol on a predetermined time-frequency resource for transmitting information blocks within the one time interval, and the calculation unit further performs time synchronization based on a relationship between the predetermined time-frequency resource and time.

[0138] In this embodiment, the network device transmits the at least one information block from the one candidate starting symbol according to a predetermined mapping relationship between the at least one information block, and the calculation unit further performs time synchronization according to the predetermined mapping relationship.

[0139] In this embodiment, the one time interval includes an integer number of first time-frequency resources for transmitting information blocks, and the at least two candidate resources are at least two of the first time-frequency resources for transmitting the information blocks with the same index value indicator among the integer number of first time-frequency resources.

[0140] In this embodiment, the indication information includes identification information of the one candidate resource among the at least two candidate resources.

[0141] In this embodiment, the indication information includes identification information of the integer number of first time-frequency resources of the first time-frequency resources corresponding to the one candidate resource.

[0142] In this embodiment, the calculation units are time synchronized based on the correspondence between the instruction information and time.

[0143] In this embodiment, the calculation unit further obtains an index value of the one signal block based on the indication information and the number of signal blocks in the at least one signal block transmitted by the network device in the one time interval.

[0144] In this embodiment, the indication information is carried in the Master Information Block (MIB) of the PBCH in one information block, or in System Information Block 1 (SIB1).

[0145] In this embodiment, the indication information is expressed as a relative time domain or frequency domain mapping relationship between the SSB and other signals or channels in the information block.

[0146] In this embodiment, the indication information is indicated by the DMRS sequence of the PBCH in the one information block and / or the PBCH payload.

[0147] For a detailed description of the fourth embodiment, the description of the corresponding steps in the second embodiment can be referred to, and the detailed description thereof will be omitted here.

[0148] According to this embodiment, by using the indication information to indicate the transmission resource of the information block, even if the default correspondence relationship between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified. In this way, the terminal device can achieve downlink synchronization. [Example]

[0149] This embodiment 5 provides a terminal device, and the principle by which the device solves the problem is similar to that of the method of embodiment 2. Therefore, for its specific implementation, reference can be made to the implementation of the method of embodiment 2, and redundant explanations of the same content will be omitted here.

[0150] Fig. 15 is a configuration diagram of a terminal device according to an embodiment of the present invention. As shown in Fig. 15, the terminal device 1500 includes a central processing unit (CPU) 1501 and a memory 1502, and the memory 1502 is connected to the central processing unit 1501. The memory 1502 can store various data and can also store programs for data processing, and can execute the programs under the control of the central processing unit 1501 to issue instructions to the terminal device based on received signaling.

[0151] In one implementation, the functions of the device 1400 in the fourth embodiment can be integrated into a central processor 1501 of a terminal device 1500, where the central processor 1501 can be configured to implement the method described in the second embodiment.

[0152] For example, the central processor 1501 may be configured to control the terminal device 1500 to perform the method of the second embodiment.

[0153] For other setting methods of the central processor 1501, refer to the second embodiment, and detailed explanations thereof will be omitted here.

[0154] In another embodiment, the above-described device 1400 can be arranged separately from the central processor 1501. For example, the device 1400 can be configured as a chip connected to the central processor 1501, and the functions of the device 1400 can be realized under the control of the central processor 1501, as in the unit shown in FIG.

[0155] According to this embodiment, by using the indication information to indicate the transmission resource of the information block, even if the default correspondence between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified. In this way, the terminal device can achieve downlink synchronization. [Example]

[0156] This embodiment 6 provides a network device, and the principle by which this device solves the problem is similar to that of the method of embodiment 1. Therefore, for its specific implementation, reference can be made to the implementation of the method of embodiment 1, and redundant explanations of the same content will be omitted here.

[0157] 16 is a block diagram of a network device according to an embodiment of the present invention. As shown in FIG. 16, the network device 1600 includes a central processing unit (CPU) 1601 and a memory 1602, and the memory 1602 is connected to the central processing unit 1601. The memory 1602 can store various data and can also store programs for data processing, and can execute the programs under the control of the central processing unit 1601.

[0158] In one embodiment, the functions of the device 1300 can be integrated into a central processor 1601, which can be configured to implement the method of the first embodiment.

[0159] For example, the central processor 1601 may be configured to control the network device 1600 to perform the method of the first embodiment.

[0160] For other setting methods of the central processor 1601, refer to the first embodiment, and detailed explanations thereof will be omitted here.

[0161] In another embodiment, the above-described device 1300 can be arranged separately from the central processor 1601. For example, the device 1300 can be configured as a chip connected to the central processor 1601, and the functions of the device 1300 can be realized under the control of the central processor 1601, as in the unit shown in FIG.

[0162] 16, the network device 1600 may further include a transceiver 1603, an antenna 1604, etc., and since the functions of these components are similar to those of the prior art, detailed description thereof will be omitted here. Note that the network device 1600 does not need to include all of the components shown in Fig. 16. The network device 1600 may also include components not shown in Fig. 16, but reference can be made to the prior art for this.

[0163] According to this embodiment, by using the indication information to indicate the transmission resource of the information block, even if the default correspondence relationship between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified. In this way, the terminal device can achieve downlink synchronization. [Example]

[0164] The seventh embodiment provides a communication system, which includes at least the terminal device 1500 of the fifth embodiment and the network device 1600 of the sixth embodiment. The contents of the fifth embodiment and the sixth embodiment are combined here, and the detailed description thereof will be omitted here.

[0165] According to this embodiment, by using the indication information to indicate the transmission resource of the information block, even if the default correspondence relationship between the information block index and the transmission resource changes, the transmission resource corresponding to the information block can be clarified. In this way, the terminal device can achieve downlink synchronization.

[0166] An embodiment of the present invention further provides a computer-readable program, which, when executed in a sending device or a network device, causes the sending device or the network device to perform the sending method of embodiment 1.

[0167] An embodiment of the present invention further provides a storage medium storing a computer-readable program, where the computer-readable program causes a transmitting device or a network device to perform the transmitting method of embodiment 1.

[0168] An embodiment of the present invention further provides a computer-readable program, which, when executed in a receiving device or a terminal device, causes the receiving device or the terminal device to perform the receiving method of embodiment 2.

[0169] An embodiment of the present invention further provides a storage medium storing a computer-readable program, which causes a receiving device or a terminal device to perform the receiving method of embodiment 2.

[0170] The above-described apparatus and method may be realized by software or hardware, or by a combination of hardware and software. The present invention further relates to a computer-readable program as described below, which, when executed by a logic component, causes the logic component to realize the above-described apparatus or component, or to perform the above-described various methods or steps. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, or a processing unit used in a computer. The present invention also relates to a storage medium, such as a hard disk, magnetic disk, optical hard disk, DVD, or flash memory, that stores the above-described program.

[0171] Furthermore, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be implemented as 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 component, a discrete gate or transistor logic component, a discrete hardware assembly, or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be further configured as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors communicatively coupled with a DSP, or any other configuration.

[0172] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and any modifications to the present invention fall within the technical scope of the present invention as long as they do not depart from the spirit of the present invention.

[0173] Furthermore, the following additional notes are disclosed regarding the above-mentioned embodiments.

[0174] (Appendix 1) A signal transmission device installed in a network device, An apparatus comprising: a transmitting unit that transmits indication information to indicate that one information block of at least one information block transmitted by the network device within one time interval is to be transmitted on one candidate resource of at least two candidate resources within the one time interval.

[0175] (Appendix 2) 10. The apparatus of claim 1, The apparatus, wherein the information block includes at least a synchronization signal / physical broadcast channel block (SS / PBCH Block, SSB).

[0176] (Appendix 3) 3. The apparatus of claim 1 or 2, The apparatus, wherein the indication information includes an identification of one of at least two candidate starting symbols for a first information block of the at least one information block.

[0177] (Appendix 4) 4. The apparatus of claim 3, The apparatus, wherein the time domain intervals of adjacent candidate starting symbols are equal, and the time domain intervals are in units of one of OFDM symbols, subframes, milliseconds, and the information blocks.

[0178] (Appendix 5) 4. The apparatus of claim 3, The candidate starting symbol is an OFDM symbol of a predetermined index value within the one time interval.

[0179] (Appendix 6) 4. The apparatus of claim 3, The network device transmits at least one information block within the one time interval in the following manner: The network device transmits the at least one information block from the one candidate resource in an order on a predetermined time-frequency resource for transmitting information blocks within the one time interval.

[0180] (Appendix 7) 4. The apparatus of claim 3, The network device transmits at least one information block within the one time interval in the following manner: The network device transmits the at least one information block from the candidate starting symbols according to a predetermined mapping relationship between the at least one information block.

[0181] (Appendix 8) 3. The apparatus of claim 1 or 2, the one time interval includes an integer number of first time-frequency resources, the first time-frequency resources being used to transmit the information block; The at least two candidate resources are at least two of the first time-frequency resources for transmitting the information block of the same index value indicator among the integer number of first time-frequency resources.

[0182] (Appendix 9) 9. The apparatus of claim 8, The apparatus, wherein the indication information includes identification information of the one candidate resource among the at least two candidate resources.

[0183] (Appendix 10) 9. The apparatus of claim 8, The apparatus, wherein the indication information includes identification information of the integer number of first time-frequency resources of the first time-frequency resources corresponding to the one candidate resource.

[0184] (Appendix 11) 10. The apparatus of claim 3 or 9, The apparatus, wherein the indication information is carried in a Master Information Block (MIB) of a PBCH in the information block or in a System Information Block 1 (SIB1).

[0185] (Appendix 12) 10. The apparatus of claim 3 or 9, The apparatus, wherein the indication information is expressed as a relative time domain or frequency domain mapping relationship between the SSB in the one information block and other signals or channels.

[0186] (Appendix 13) 11. The apparatus of claim 10, further comprising: The apparatus, wherein the indication information is indicated by a DMRS sequence of a PBCH and / or a payload of the PBCH in the one information block.

[0187] (Appendix 14) A signal receiving device installed in a terminal device, a receiving unit for receiving indication information of a network device transmission, the indication information being used to indicate that an information block transmitted by the network device and received by the terminal device is transmitted on one of at least two candidate resources within one time interval; and and a computing unit for performing time synchronization based on the indication information.

[0188] (Appendix 15) 15. The apparatus of claim 14, The apparatus, wherein the information block includes at least a synchronization signal / physical broadcast channel block (SS / PBCH Block, SSB).

[0189] (Appendix 16) 15. The apparatus of claim 14, The network device transmits at least one information block within the one time interval, the at least one information block including the one information block.

[0190] (Appendix 17) 17. The apparatus of claim 16, further comprising: The apparatus, wherein the indication information includes indicator information of one candidate starting symbol of at least two candidate starting symbols of a first information block of the at least one information block.

[0191] (Appendix 18) 18. The apparatus of claim 17, The apparatus, wherein the time domain intervals of adjacent candidate starting symbols are equal, and the time domain intervals are in units of one of OFDM symbols, subframes, milliseconds, and the information blocks.

[0192] (Appendix 19) 19. The apparatus of claim 18, further comprising: the indicator information of the one candidate start symbol includes the number of the time domain intervals between the one candidate start symbol and a first candidate start symbol of the at least two candidate start symbols; The calculation unit performs time synchronization based on the instruction information, the length of the time domain interval, and the index value of the one information block.

[0193] (Appendix 20) 18. The apparatus of claim 17, the at least one candidate starting symbol is an OFDM symbol at a predetermined index value within the one time interval; the indicator information of the one candidate start symbol includes indicator information of the OFDM symbol of the predetermined index value; The calculation unit performs time synchronization based on the index value of the instruction information and the one information block.

[0194] (Appendix 21) 21. The apparatus of claim 19 or 20, The network device sequentially transmits the at least one information block from the one candidate starting symbol on a predetermined time-frequency resource for transmitting information blocks within the one time interval; The computing unit further performs time synchronization based on a predetermined relationship between the time-frequency resource and time.

[0195] (Appendix 22) 21. The apparatus of claim 19 or 20, The network device transmits the at least one information block from the one candidate starting symbol according to a predetermined mapping relationship between the at least one information block; The computing units are further time synchronized based on the predetermined mapping relationship.

[0196] (Appendix 23) 15. The apparatus of claim 14, the one time interval includes an integer number of first time-frequency resources for transmitting an information block; The at least two candidate resources are at least two of the first time-frequency resources for transmitting information blocks of the same index value indicator among the integer number of first time-frequency resources.

[0197] (Appendix 24) 24. The apparatus of claim 23, The apparatus, wherein the indication information includes identification information of the one candidate resource among the at least two candidate resources.

[0198] (Appendix 25) 24. The apparatus of claim 23, The apparatus, wherein the indication information includes identification information of the integer number of first time-frequency resources of the first time-frequency resources corresponding to the one candidate resource.

[0199] (Appendix 26) 26. The apparatus of claim 24 or 25, The calculation unit performs time synchronization based on the correspondence between the instruction information and time.

[0200] (Appendix 27) 26. The apparatus of claim 25, The calculation unit further obtains an index value for the one signal block based on the indication information and a number of signal blocks among the at least one signal block transmitted by the network device within the one time interval.

[0201] (Appendix 28) 25. The apparatus of claim 16 or 24, The apparatus, wherein the indication information is carried in a Master Information Block (MIB) of a PBCH in the one information block or in a System Information Block 1 (SIB1).

[0202] (Appendix 29) 25. The apparatus of claim 16 or 24, The apparatus, wherein the indication information is expressed as a relative time domain or frequency domain mapping relationship between SSB and other signals or channels in the information block.

[0203] (Appendix 30) 26. The apparatus of claim 25, The apparatus, wherein the indication information is indicated by a DMRS sequence of a PBCH and / or a payload of the PBCH in the one information block.

[0204] (Appendix 31) 1. A communication system comprising: The communication system includes a network device and a terminal device; A communication system, wherein the network device comprises a transmitting device according to any one of Supplements 1-13, and the terminal device comprises a receiving device according to any one of Supplements 14-30.

Claims

1. A signal transmission device installed in a network device, comprising: A transmitting unit is included. The transmitting unit: transmitting an index of a first time-frequency resource among an integer number of first time-frequency resources used for transmitting a synchronization signal / physical broadcast channel (PBCH) block (SSB) within a time interval, an SSB index of the SSB transmitted on the first time-frequency resource is equal to mod (the index of the first time-frequency resource, 4), one first time-frequency resource is used for transmitting one SSB, each first time-frequency resource includes four symbols, the integer number of first time-frequency resources includes at least two first time-frequency resources used for transmitting SSBs identified by a same SSB index, the first time-frequency resource is one of the at least two first time-frequency resources, and the index of the first time-frequency resource is carried by a DMRS sequence and / or a PBCH payload in the SSB transmitted using the first time-frequency resource; and Transmit only one of the SSBs identified by the same SSB index within the time interval. A transmitting device configured as follows.

2. A signal receiving device installed in a terminal device, comprising: a receiving unit configured to receive an index transmitted by a network device, the index indicating a first time-frequency resource among an integer number of first time-frequency resources used for transmitting a synchronization signal / physical broadcast channel (PBCH) block (SSB) within a time interval, an SSB index of the SSB transmitted on the first time-frequency resource is equal to mod (index of the first time-frequency resource, 4), one first time-frequency resource is used for transmitting one SSB, each first time-frequency resource includes four symbols, the integer number of first time-frequency resources includes at least two first time-frequency resources used for transmitting SSBs identified by a same SSB index, the first time-frequency resource is one of the at least two first time-frequency resources, the index of the first time-frequency resource is carried by a DMRS sequence and / or a PBCH payload in an SSB transmitted using the first time-frequency resource, and only one of the SSBs identified by the same SSB index is received within the time interval; and A receiving device including a calculation unit for performing time synchronization based on said index.

3. 3. The receiving device according to claim 2, A receiving device, wherein the calculation unit achieves the time synchronization based on the index of the first time-frequency resource and a correspondence between the index of the first time-frequency resource and time.

4. 3. The receiving device according to claim 2, The calculation unit further obtains an SSB index value of the SSB transmitted using the first time-frequency resource based on the index of the first time-frequency resource and the number of SSBs transmitted by the network device within the time interval, receiving device.

5. A signal transmission device installed in the network device; and A communication system including a signal receiving device installed in a terminal device, The transmitting device transmitting an index of a first time-frequency resource among an integer number of first time-frequency resources used for transmitting a synchronization signal / physical broadcast channel (PBCH) block (SSB) within a time interval, an SSB index of the SSB transmitted on the first time-frequency resource is equal to mod (the index of the first time-frequency resource, 4), one first time-frequency resource is used for transmitting one SSB, each first time-frequency resource includes four symbols, the integer number of first time-frequency resources includes at least two first time-frequency resources used for transmitting SSBs identified by a same SSB index, the first time-frequency resource is one of the at least two first time-frequency resources, and the index of the first time-frequency resource is carried by a DMRS sequence and / or a PBCH payload in the SSB transmitted using the first time-frequency resource; and Transmit only one of the SSBs identified by the same SSB index within the time interval. The communication system is configured as follows.

6. 2. The transmitting device according to claim 1, A transmitting device, wherein the integer number of the first time-frequency resources is determined based on a subcarrier spacing.

7. 2. The transmitting device according to claim 1, A transmitting device, wherein the one-to-one correspondence between the SSB index and the first time-frequency resource is variable.

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