Synchronization signal transmission method and device, storage medium and program product

Abstract

The embodiment of the invention provides a synchronization signal transmission method and device, a storage medium and a program product, relates to the technical field of communication, and can reduce interference of synchronization signal transmission between cells. The method comprises: receiving a synchronization signal, the synchronization signal being sent based on an association relationship, the association relationship comprising an association relationship between a plurality of first resource indexes of the synchronization signal and a plurality of airspace resource indexes of the synchronization signal, the association relationship being determined according to a second resource index.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to methods, devices, storage media and program products for synchronous signal transmission. Background Technology

[0002] In wireless communication systems, beams can be used to transmit synchronization signals, thereby increasing the coverage of the synchronization signals. However, when multiple cells transmit synchronization signals through beams, interference can occur between the synchronization signals during transmission. Furthermore, the detection times of different beams within the same cell vary, resulting in uneven access and handover times for different beams. Summary of the Invention

[0003] This disclosure provides a method, apparatus, storage medium, and program product for transmitting synchronization signals, which can reduce interference in the transmission of synchronization signals between cells.

[0004] On one hand, a synchronization signal transmission method is provided, comprising: receiving a synchronization signal, wherein the synchronization signal is transmitted based on an association relationship, the association relationship including an association relationship between a plurality of first resource indices of the synchronization signal and a plurality of spatial resource indices of the synchronization signal, the association relationship being determined based on a second resource index.

[0005] In another aspect, a method for transmitting a synchronization signal is provided, comprising: obtaining an association relationship between a plurality of first resource indices of the synchronization signal and a plurality of spatial resource indices of the synchronization signal according to a second resource index; and transmitting the synchronization signal based on the association relationship.

[0006] In another aspect, a synchronization signal transmission device is provided, comprising: a receiving unit; the receiving unit is configured to receive a synchronization signal, the synchronization signal being transmitted based on an association relationship, the association relationship including an association relationship between a plurality of first resource indices of the synchronization signal and a plurality of spatial resource indices of the synchronization signal, the association relationship being determined based on a second resource index.

[0007] In another aspect, a synchronization signal transmission device is provided, comprising: an acquisition unit and a transmission unit; the acquisition unit is configured to acquire, according to a second resource index, an association relationship between a plurality of first resource indices of the synchronization signal and a plurality of spatial resource indices of the synchronization signal; the transmission unit is configured to transmit the synchronization signal based on the association relationship.

[0008] In another aspect, an electronic device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; and the processor, when executing the computer program, implements the synchronization signal transmission method described in any of the above embodiments.

[0009] In another aspect, a computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the synchronization signal transmission method described in any of the above embodiments.

[0010] In another aspect, a computer program product is provided, which includes computer program instructions that, when executed by a processor, implement the synchronization signal transmission method described in any of the above embodiments.

[0011] This disclosure discloses an embodiment in which a first node can receive synchronization signals sent based on an association relationship. Since this association relationship is determined according to a second resource index, it is an association between multiple first resource indices and multiple spatial resource indices of the synchronization signal. Therefore, when sending and receiving synchronization signals, it is no longer necessary to follow a fixed association relationship, thereby randomizing interference between inter-cell synchronization signals and reducing interference. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.

[0013] Figure 1 A schematic diagram illustrating a beam-based synchronization signal transmission according to some embodiments of this disclosure;

[0014] Figure 2 This is a schematic diagram illustrating the transmission of synchronization signals between different cells, provided for some embodiments of this disclosure;

[0015] Figure 3 A communication system architecture diagram provided for some embodiments of this disclosure;

[0016] Figure 4 A flowchart illustrating a synchronization signal transmission method provided in some embodiments of this disclosure. Figure 1 ;

[0017] Figure 5 This is a schematic diagram illustrating the transmission of synchronization signals using different mapping relationships of time-domain resources and spatial-domain resources in different synchronization signal periods, as provided in some embodiments of this disclosure.

[0018] Figure 6 A schematic diagram of a first type of parameter and a second type of parameter of a PCI group provided for some embodiments of this disclosure;

[0019] Figure 7This is a schematic diagram illustrating a combination of a code domain and a time domain resource, provided for some embodiments of this disclosure;

[0020] Figure 8 A schematic diagram illustrating the transmission of a synchronization signal on a subset of candidate first resources, provided for some embodiments of this disclosure;

[0021] Figure 9 This disclosure provides an illustration of how the same set of spatial resource indexes occupies different first resource index sets in different synchronization signal cycles, according to some embodiments. Figure 1 ;

[0022] Figure 10 This disclosure provides an illustration of how the same set of spatial resource indexes occupies different first resource index sets in different synchronization signal cycles, according to some embodiments. Figure 2 ;

[0023] Figure 11 A schematic diagram illustrating a process for transmitting a synchronization signal, provided for some embodiments of this disclosure;

[0024] Figure 12 A schematic diagram illustrating the correspondence between airspace resources and PRACH resource pools provided for some embodiments of this disclosure. Figure 1 ;

[0025] Figure 13 A schematic diagram illustrating the correspondence between airspace resources and PRACH resource pools provided for some embodiments of this disclosure. Figure 2 ;

[0026] Figure 14 This disclosure provides a schematic diagram of the correspondence between detection opportunities for airspace resources and common control channels, as illustrated in some embodiments of the present disclosure. Figure 1 ;

[0027] Figure 15 This disclosure provides a schematic diagram of the correspondence between detection opportunities for airspace resources and common control channels, as illustrated in some embodiments of the present disclosure. Figure 2 ;

[0028] Figure 16 A flowchart illustrating a synchronization signal transmission method provided in some embodiments of this disclosure. Figure 2 ;

[0029] Figure 17 A schematic diagram of the structure of a communication device provided in some embodiments of this disclosure. Figure 1 ;

[0030] Figure 18 A schematic diagram of the structure of a communication device provided in some embodiments of this disclosure. Figure 2 ;

[0031] Figure 19 A schematic diagram of the structure of a communication device provided in some embodiments of this disclosure. Figure 3 . Detailed Implementation

[0032] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] It should be noted that, in this disclosure, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0034] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0035] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "more than one" means two or more.

[0036] In 5G systems, beamforming can be used to transmit synchronization signals, thereby increasing synchronization signal coverage at low frequencies and allowing analog signal transmission at high frequencies to achieve cell coverage. However, in 5G New Radio (NR) systems, when multiple cells transmit synchronization signals via beamforming, issues arise such as significant spatial interference, uneven access and handover times for different beams. Furthermore, as the number of antennas and communication carrier frequencies increases, the number of beams used for synchronization signals also increases, exacerbating these problems and making them urgent technical challenges that require resolution.

[0037] For example, Figure 1 A schematic diagram of a beam-based synchronization signal transmission method is shown. (For example...) Figure 1 As shown, in each synchronization signal period, the base station transmits synchronization signals on four time-domain resources (SS0, SS1, SS2, SS3) using four transmission beams (S0, S1, S2, S3). Each time-domain resource includes 128 resource elements (REs) on each of two time-domain symbols. In different synchronization signal periods, synchronization signals transmitted with the same time-domain resource index satisfy a quasi-co-location relationship. For example, in different synchronization signal periods, the base station uses the same beam to transmit synchronization signals on the same time-domain resource index. For instance, in synchronization signal periods n and n+1, for a time-domain resource index i (where i is any one of 0, 1, 2, 3), the synchronization signals transmitted by the base station at time-domain resource index i satisfy a quasi-co-location relationship.

[0038] In one possible implementation, multiple time-domain resources transmit the same sequence of synchronization signals within a synchronization signal period, such as synchronization signals corresponding to a single physical cell index (PCI). Synchronization signals with the same time-domain resource index under different PCIs have no spatial resource association. For example, synchronization signals with the same time-domain resource index under different PCIs do not satisfy a quasi-co-location relationship; that is, the quasi-co-location relationship of synchronization signals is only satisfied within the same cell.

[0039] However, in accordance with Figure 1 Sending synchronization signals in this manner can lead to significant synchronization signal interference. Because the correlation between time-domain and spatial-domain resources remains unchanged across different synchronization signal periods, if synchronization signal interference occurs between cells, that interference will persist, resulting in substantial inter-cell synchronization signal interference. For example... Figure 2 As shown, the synchronization signal interference between cell 1 and cell 2 does not change over time but persists indefinitely. Under severe interference, terminals in both cells cannot access the network. Unless cell 1 and cell 2 negotiate, the synchronization signal beam interference transmitted in the overlapping resource area is relatively small. However, this method increases the amount of negotiation between cells, which is not conducive to adding base stations or transmitting nodes to the network as needed, and places a heavy burden on network deployment and expansion.

[0040] To address this, this disclosure provides a synchronization signal transmission method, in which a first node can receive synchronization signals transmitted based on an association relationship. Since this association relationship is determined according to a second resource index, it represents the association between multiple first resource indices and multiple spatial resource indices of the synchronization signal. Therefore, when sending and receiving synchronization signals, it is no longer necessary to follow a fixed association relationship, thereby randomizing interference between inter-cell synchronization signals and reducing interference.

[0041] The synchronization signal transmission method provided in this disclosure can be applied to systems with various communication standards. For example, the systems to which the synchronization signal transmission method provided in this disclosure is applicable include, but are not limited to, long term evolution (LTE) systems, various versions based on LTE evolution, 5G systems, future mobile communication networks (such as 6G mobile communication networks), or multiple converged communication systems. Furthermore, the synchronization signal transmission method provided in this disclosure can also be applied to future-oriented communication systems.

[0042] For example, the above-described synchronization signal transmission method can be applied to, for example, Figure 3 In the aforementioned communication system, such as Figure 3 As shown, the communication system includes: a first node 301 and a second node 302.

[0043] In this system, the first node 301 and the second node 302 are communicatively connected. The first node 301 can be a terminal, an IoT device, a receiving node, etc., and the second node 302 can be a base station, a transmitting antenna, or a transmitting node. In another communication method, such as sidelink or V2X communication scenarios, the first node can be a first terminal or a first device, and the second node can be a second terminal or a second device, etc.

[0044] In this embodiment, the second node 302 can determine the association between the first resource index and the spatial resource index of the synchronization signal based on the second resource index. Then, the second node 302 can send the synchronization signal based on this association. The first node 301 can receive the synchronization signal. In this way, the association of the synchronization signals is no longer fixed but changes with the second resource, thereby randomizing interference between inter-cell synchronization signals and reducing interference.

[0045] In some embodiments, the terminal can be a device with wireless transceiver capabilities, which can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as on ships); and it can also be deployed in the air (e.g., on airplanes, balloons, and satellites). The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiments of this application do not limit the application scenarios. The term "terminal" can sometimes also refer to a user, user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, or UE device, etc., but the embodiments of this application do not limit this to these terms.

[0046] In some embodiments, the base station may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTEA), or an evolved Node B (eNB or eNodeB), a base station device in a 5G network, or a base station in a future communication system. The base station may include various macro base stations, micro base stations, femtocell base stations, wireless remote extensions, reconfigurable intelligent surfaces (RISs), routers, wireless fidelity (WIFI) devices, or various network-side devices such as primary cells and secondary cells.

[0047] It should be noted that, Figure 3 This is just an example framework diagram. Figure 3 The number of devices included and the names of each device are unlimited, except for... Figure 3 In addition to the devices shown, the communication system may also include other devices, such as relay nodes.

[0048] The application scenarios of the embodiments disclosed herein are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0049] The synchronization signal transmission method provided in the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0050] The synchronization signal transmission method provided in this disclosure can be applied to... Figure 3 The first node 301 in the communication system shown. Figure 4 A flowchart of a synchronization signal transmission method is shown. Figure 1 ,like Figure 4 As shown, the synchronization signal transmission method includes the following S401.

[0051] S401, The first node receives the synchronization signal.

[0052] The synchronization signal is transmitted based on an association relationship. This association relationship is determined by the second resource index and the spatial resource index of the synchronization signal. The second resource index can be used to index the period of the synchronization signal, and the first resource can include time-domain resources. A second resource containing the synchronization signal includes at least one first resource. For example, a synchronization signal period may include multiple time-domain resources.

[0053] In one possible implementation, the temporal resource index and spatial resource index have a fixed association relationship within different synchronization signal periods. When inter-cell synchronization signals interfere, the interference persists due to the fixed association relationship, making it impossible to reduce the interference. To address this issue, the association relationship between the first resource index and the spatial resource index can be decoupled, and a new association relationship (between the first and spatial resource indices) can be established for each synchronization signal period. The second node can determine the association relationship between the first and spatial resource indices based on the second resource index and send a synchronization signal based on this association relationship. Thus, when inter-cell synchronization signal interference occurs, the association relationship corresponding to different synchronization signal periods is no longer fixed, preventing the previously interfering synchronization signal from interfering again, thereby achieving interference randomization and reducing inter-cell synchronization signal interference. Optionally, the association relationships corresponding to different synchronization signal periods can be the same or different. The synchronization signal periods can be pre-configured or determined based on indication information. The association relationship can also be pre-agreed or determined based on indication information provided by the second node.

[0054] Furthermore, while reducing interference between synchronization signals between cells, different beams (i.e., beams corresponding to spatial resource indices) correspond to different first resource indices in different synchronization signal cycles. As a result, the beams that are detected first will be different in different synchronization signal cycles, which can solve problems such as uneven access duration and handover duration for different wavelengths.

[0055] In one possible implementation, a transmission opportunity is a primary resource. For example, within a synchronization signal cycle, a transmission opportunity is a time-domain resource. Figure 5 As shown, when the second resource is a synchronization signal period, a system message time window includes multiple synchronization signal periods, and each synchronization signal period includes multiple transmission opportunities (SS0, SS1, SS2, SS3). Different synchronization signal periods correspond to different associations (e.g., the association between transmission opportunities and spatial resource indices). The spatial resource indices of transmission opportunity SS0 in synchronization signal period n and transmission opportunity SS0 in synchronization signal period n+10 are different, therefore the transmitted beams are also different. That is, the transmission beam of transmission opportunity SS0 in synchronization signal period n is beam 0, and the transmission beam of SS0 in synchronization signal period n+10 is beam 2. Therefore, synchronization signals with the same first resource index in different synchronization signal periods do not necessarily satisfy a quasi-co-address relationship. Whether a quasi-co-address relationship is satisfied depends on whether their corresponding spatial resources are the same. If they are the same, a quasi-co-address relationship is satisfied; if they are different, a quasi-co-address relationship is not satisfied. SS0 is the index of the first resource of the synchronization signal.

[0056] The following will describe the above-mentioned features:

[0057] For the first resource corresponding to the first resource index:

[0058] The first resource is used to index at least one of the following: the time domain resource of the synchronization signal, the frequency domain resource of the synchronization signal, and the code domain resource of the synchronization signal.

[0059] The first resource can be other resources besides time-domain resources (e.g., frequency-domain resources, code-domain resources). When the synchronization signal is transmitted in a time-division manner, the above association is the association between the time-domain resource index and the spatial-domain resource index. When the synchronization signal is transmitted in a frequency-division or code-division manner, the above association is the association between the frequency-domain resource index or the code-domain resource index and the spatial-domain resource index. Therefore, the first resource index can index either frequency-domain resources or code-domain resources. Correspondingly, when the synchronization signal is transmitted in a time-division or frequency-division manner, the first resource index can be used to index a combination of time-domain resources and frequency-domain resources, and so on.

[0060] In one possible implementation, the first resource includes code domain resources, which include cell group indexes. At least one cell index within a cell group index shares the same value for a first type of parameter, while the value of the second type of parameter for each cell index within the cell group index is determined separately. For example, when the code domain resource includes PCIs, and one PCI group corresponds to one logical cell, the configuration values ​​of the first type of parameters for each PCI within a PCI group are the same, while the configuration values ​​of the second type of parameters for each PCI within a PCI group are also different. Figure 6 As shown, a PCI group includes three PCIes: PCI 1, PCI 2, and PCI 3. The three PCIes have the same configuration values ​​for the first type of parameters, but different configuration values ​​for the second type of parameters. The configuration values ​​for the second type of parameters of PCI 1 are from the first set of configuration values, the configuration values ​​for the second type of parameters of PCI 2 are from the second set of configuration values, and the configuration values ​​for the third type of parameters of PCI 3 are from the third set of configuration values.

[0061] When the first resource includes both time-domain and code-domain resources, a transmission opportunity for a synchronization signal (i.e., the first resource) is a combination of the time-domain and code-domain resources of that synchronization signal. That is, two synchronization signals can be transmitted on a single time-domain resource using different code-domain resources, creating two transmission opportunities for the same synchronization signal. Multiple transmission opportunities for synchronization signals can exist on the same time-domain resource, with different transmission opportunities corresponding to different code-domain resources for the same synchronization signal. Alternatively, synchronization signals can be transmitted on the same code-domain resource using different time-domain resources. For example... Figure 7 As shown, a system message time window includes multiple synchronization signal cycles. In each synchronization signal cycle, all candidate transmission opportunities are used to transmit the synchronization signal. However, the association between the transmission opportunity index and the spatial resource index differs in different synchronization signal cycles. The first resource of the synchronization signal is a combination of the time-domain resource and the code-domain resource of the synchronization signal; that is, the first resource is a code-domain resource on a time-domain resource. Different transmission opportunities are distinguished by at least one of the time-domain resource and the code-domain resource of the synchronization signal. For example, transmission opportunities SS0~1 in synchronization signal cycle n are a combination of a time-domain resource and a code-domain resource, and the beam transmitted by this transmission opportunity is beam {0,1}.

[0062] The code domain resource of the synchronization signal includes the sequence resource of the synchronization signal. This code domain resource can be the cell index mentioned above, or it can be a code domain resource different from the cell index. For example, when a PCI group constitutes a cell, the code domain resource is the PCI. When a PCI constitutes a cell, the same PCI will correspond to multiple synchronization signal sequences on a first resource. For example, these multiple synchronization signal sequences are obtained by multiplying the same synchronization signal sequence by a frequency domain orthogonal code (OOC). For example, this same synchronization signal sequence is obtained according to the PCI, x0(n) = y(n mod C), x(n) = x0(n)z(n), n = 0, 1, ..., N-1, where x0(n) is the same synchronization signal sequence obtained according to the PCI. N is the resource element (RE) index of the synchronization signal, C is a positive integer greater than or equal to 1, y(j), j = 0, 1, ..., C-1 is an orthogonal sequence of length C, and z(n) can be z(n) = e j2παn , A and B are positive integers or real numbers less than or equal to 0, where 0 ≤ α ≤ 1.

[0063] Figure 5 and Figure 7 In one implementation, the first node sends a synchronization signal on each of the multiple candidate first resources for the synchronization signal. In another implementation, as... Figure 8 In the process, the first node selects 6 candidate airspace resources out of 8 candidate airspace resources in the synchronization signal period n to transmit beams, while the empty airspace resources (SS6~7) do not transmit beams, so it only occupies 6 candidate airspace resources.

[0064] For the second resource corresponding to the second resource index:

[0065] The second resource index is used to index at least one of the following: a period index, a half-frame index, and a frame index of the synchronization signal. The half-frame index and frame index can be the frame index and half-frame index of the synchronization signal, or they can be a frame index and half-frame index that are not part of the synchronization signal. For example, the association relationship is determined based on the frame index and half-frame index, but the synchronization signal is not present on some frames or half-frames. Since both the half-frames and frames of the synchronization signal are periodic, the half-frames and frames of the synchronization signal can also be referred to as the period of the synchronization signal.

[0066] In addition to the period of the synchronization signal, the second resource can also be a cell index (e.g., PCI) or a cell group index (e.g., a PCI group). Since the association relationship corresponding to each cell is fixed, when synchronization signals interfere with each other, the association relationship between the first resource and the spatial resources can be changed based on the cell, thereby reducing interference between synchronization signals. Optionally, different PCIs correspond to different association relationships, and the association relationship between multiple first resources and multiple spatial resources of the synchronization signal can be determined based on at least one of the following: the second resource index, PCI, or PCI group where the synchronization signal is located. For example, the first node can determine the above association relationship based on the second resource index and the PCI; that is, the above mapping relationship is different for different PCIs.

[0067] In one possible implementation, the association relationship is determined based on the cell index or cell group index and a second resource index. In this case, the second resource is the period of the synchronization signal, and the first node can determine the aforementioned association relationship based on the period of the synchronization signal and the cell index (or cell group index). Thus, the association relationship of each cell in each period is no longer fixed; the association relationships of multiple cells within the same period can change, thereby randomizing the interference of synchronization signals between cells and reducing synchronization signal interference. Furthermore, the aforementioned association relationship can be pre-configured; therefore, the interference of synchronization signals with association relationships configured for multiple cells is relatively small, further reducing the interference of inter-cell synchronization signals.

[0068] In another possible implementation, the second resource can also be a frequency domain resource of a synchronization signal, wherein one of the second resources includes multiple first resources, and the association relationship of different second resources can be different, that is, the association relationship can be different in the frequency domain resources of different synchronization signals.

[0069] For the airspace resources corresponding to the airspace resource index:

[0070] The airspace resources are used to index at least one of the following: (the second node's) transmit beam, (the first node's) receive beam, channel large-scale parameters, and quasi-co-location reference signals.

[0071] Among them, the large-scale parameters of the channel include at least one of the following: Doppler shift, Doppler spread, average delay, delay spread, spatial receiving parameters, and average gain.

[0072] In one possible implementation, synchronization signals on two first resources with the same spatial resource index, located in different second resources, satisfy a quasi-co-location relationship. Optionally, synchronization signals satisfying the quasi-co-location relationship also need to satisfy at least one of the following: the same cell index, the same cell group index, the same frequency domain resource, the same code domain resource, or the same transmission opportunity group.

[0073] For example, as described above Figure 5 As shown, the spatial resource index corresponding to transmission opportunity SS2 in synchronization signal period n is the same as the spatial resource index corresponding to transmission opportunity SS0 in synchronization signal period n+10, that is, the transmitted beam is beam 2. Therefore, the synchronization signal transmitted by transmission opportunity SS2 in synchronization signal period n and the synchronization signal transmitted by transmission opportunity SS0 in synchronization signal period n+10 satisfy the quasi-co-address relationship.

[0074] It should be noted that a physical cell may include multiple synchronization signal transmission opportunity groups. Different synchronization signals belong to different synchronization signal transmission opportunity groups from different transmit antenna nodes (e.g., antenna ports). For example, a physical cell may include multiple transmit receive points (TRPs).

[0075] For example, the association can be determined by a predetermined formula, such as the airspace resource index being determined based on at least one of the following:

[0076] Airspace resource index = f1(transmission opportunity index, second resource index);

[0077] Airspace resource index = f2(transmission opportunity index, second resource index, PCI);

[0078] Airspace resource index = f3(transmission opportunity index, second resource index, PCI group index);

[0079] Airspace resource index = f4(transmission opportunity index, g1(second resource index));

[0080] Airspace resource index = f5(transmission opportunity index, g2(second resource index, PCI));

[0081] Airspace resource index = f6(transmission opportunity index, g3(second resource index, PCI group index));

[0082] The spatial resource index is determined based on the transmission opportunity index (i.e., the first resource index mentioned above) and the second resource index. It can also be determined based on at least one of the PCI and PCI group indexes. g1, g2, and g3 are random sequence functions. The random sequence is determined by the function's input values. For example, the initial value of g1 (the second resource index) is determined by the second resource index; the initial value of g2 (the second resource index, PCI) is determined by the second resource index and PCI (or g2 is a sequence whose initial value is determined by PCI, and g2 (the second resource index, PCI) is the element value corresponding to the second resource index in this sequence); the initial value of g3 (the second resource index, PCI group index) is determined by the second resource index and the index of the PCI group (or g3 is a sequence whose initial value is determined by the PCI group index, and g3 (the second resource index, PCI group index) is the element value corresponding to the second resource index in this sequence). g1, g2, and g3 are determined by an initial value, which can also be called the function input value. f1, f2, f3, f4, f5, and f6 are functions used to determine the spatial resource indices corresponding to each transmission opportunity index. The input parameters for f3 and f6 include the PCI group index, for two reasons: firstly, considering the future scenario where one PCI group corresponds to one logical cell; and secondly, ensuring consistency in the jump patterns of multiple PCI associations. For example, if the network plans several pairs of spatial resources from neighboring cells, such as spatial resource i from cell 0 and spatial resource i from cell 1 with minimal interference, but when i is not equal to j, the interference between spatial resource i from cell 0 and spatial resource j from cell 1 is relatively large. Therefore, spatial resource i from cell 0 and spatial resource i from cell 1 are always allowed to occupy overlapping transmission resources. That is, the mapping relationship between the transmission opportunities and spatial resources of the synchronization signals of two cells changes with the synchronization signal period, but the spatial resource indices corresponding to the overlapping resources of the two cells are the same. The form of the mapping relationship (i.e., the association relationship) can be predetermined, and / or the form of the mapping relationship can be determined according to at least one of the following: PCI, information notified in the physical broadcast channel (PBCH).

[0083] In one example, determining the association based on the second resource index includes determining the association based on the second resource index and a predetermined value, thereby ensuring that multiple consecutive second resources have the same association, reducing the complexity of terminal detection of synchronization signals. For example, it can be based on at least one of the following: floor(second resource / predetermined value), mod(second resource index, predetermined value), where floor(y) is the largest integer less than or equal to y. mod(m, n) takes the remainder between m and n. For example, mod(7,4) = 3.

[0084] In some embodiments, among at least two second resources corresponding to at least two second resource indices, the first resource indices corresponding to the same spatial resource index are different.

[0085] In the second resources corresponding to at least two second resource indices, the patterns occupied by the multiple first resources corresponding to the multiple first resource indices of the synchronization signal are the same. For example, each synchronization signal period (i.e., the second resource) includes the same number of candidate transmission opportunities (i.e., first resources), and the resource patterns occupied by multiple candidate transmission opportunities in different synchronization signal periods are the same. The pattern is that the resources occupied by multiple candidate transmission opportunities have the same index in the resources included in a synchronization signal. For example, the synchronization signal period is 20 milliseconds (ms), and each synchronization signal period includes X candidate transmission opportunities. The X candidate transmission opportunities occupy the same resource pattern in each period. For example, the X candidate transmission opportunities occupy X time-domain resources in 5ms. In the nth synchronization signal period, the time-domain symbol with the index {y, y+M, y+2*M, y+3M} occupies the third 5ms of the four 5ms in this 20ms period, where y is the starting symbol occupied by the X time-domain resources, and M is a positive integer. The time-domain symbol with the index {y, y+M, y+2*M, y+3M} also occupies the third 5ms of the four 5ms in this 20ms period during the (n+1)th synchronization signal cycle.

[0086] It should be noted that a synchronization signal period includes multiple candidate first resources, but the second node does not necessarily send synchronization signals on every candidate first resource; instead, it can select several candidate first resources to send synchronization signals to. Furthermore, the first node does not receive synchronization signals on every first resource, but rather on several first resources notified by the second node. The second node can notify different first nodes of different sets of first resource indexes (i.e., the index set of the target first resources), thereby enabling the first node to receive synchronization signals and / or determine target parameters based on the first resource index set. The following description of the first node receiving synchronization signals based on the first resources is similar to the description of determining target parameters based on the first resource index set.

[0087] In some embodiments, when receiving a synchronization signal, the first node can first determine the set of indices of the target first resource within a synchronization signal period. For example, among at least two second resources corresponding to at least two second resource indices, the set of indices of the target first resource is determined according to the association relationship, and the target first resource belongs to the multiple first resources corresponding to the multiple first resource indices. It should be understood that if the first resource for receiving the synchronization signal is determined based on the set of first resource indices, the target first resource is the first resource used by the second node to send the synchronization signal among multiple candidate first resources in a synchronization signal period. The first node can receive / detect the synchronization signal on some or all of the target first resources of the second node. If other target parameters are determined based on the set of indexes of the first resources, other signals (i.e., other signals) cannot occupy the target first resource, and / or the quasi-co-address parameters of other signals are obtained based on the synchronization signals on these first resources. In this case, the target first resource can be understood as the first resource used by the second node to send the synchronization signal, or it can be understood as the target first resource only for obtaining the above target parameters, and there is no restriction on whether the second node sends a synchronization signal on it, providing sufficient flexibility for the implementation scheme of the second node.

[0088] It should be noted that among at least two second resources corresponding to at least two second resource indices, the number of target first resources occupied by the synchronization signal is the same, and the target first resources are multiple first resources belonging to multiple first resource indices. If different first resources are distinguished by time division and frequency division, the number of target first resources is the same, but the number of time-domain resources or frequency-domain resources corresponding to the target first resources can be different, such as... Figure 10 and Figure 8 As shown.

[0089] That is, in at least two second resources corresponding to at least two second resource indices, the number of indices of the target first resource in the index set of the target first resource occupied by the synchronization signal is the same, and the target first resource is the multiple first resources belonging to the multiple first resource indices. Optionally, the index sets of the target first resources are different for at least two second resources. The number of elements included in the index sets of the target first resources is the same.

[0090] Next, the first node can determine the target parameters based on the index set of the target first resource.

[0091] Since a second resource includes multiple first resources for synchronization signals, and these multiple first resources are candidate resources, that is, the second node selects at least one first resource as the target first resource from these multiple first resources and sends a synchronization signal based on the target first resource, while the remaining resources do not send synchronization signals, the first node can receive the synchronization signal on the target first resource.

[0092] For example, the above Figure 5 As shown, in one synchronization signal cycle (i.e., one second resource), each candidate first resource transmits a beam, and four transmit beams are required to achieve cell coverage. However, as Figure 9 As shown, a system message time window includes multiple synchronization signal cycles, and each synchronization signal cycle includes four transmission opportunities (i.e., there are four candidate first resources). The second node can select three of the four transmission opportunities to transmit beams (i.e., beams used to transmit synchronization signals). For example, transmission opportunity SS3 in synchronization signal cycle n does not transmit a beam, and transmission opportunity SS2 in synchronization signal cycle n+10 does not transmit a beam. Since the association between the spatial resource index and transmission opportunities changes with the cycle, the three beams occupy different transmission opportunities in different cycles. In cycle n, the three beams occupy transmission opportunities (SS0, SS1, SS2), and in cycle n+10, they occupy transmission opportunities (SS0, SS1, SS3). In this way, the first node can transmit other signals on transmission opportunities where synchronization signals are not transmitted in a cycle, thereby randomizing inter-cell synchronization signal interference in the spatial domain and also in the transmission opportunities, further reducing inter-cell synchronization signal interference.

[0093] In another example, X candidate transmission opportunities in a synchronization signal transmission cycle correspond to X spatial resources. However, the second node may occupy all or part of the X candidate transmission opportunities. For example, a second node may occupy only X1 candidate transmission opportunities out of the X candidate transmission opportunities, where X1 is a positive integer less than or equal to X. The X1 candidate transmission opportunity index sets may correspond to the same X1 spatial resource index sets, but the X1 transmission resource index sets corresponding to the X1 candidate transmission opportunity index sets may be different. The second node notifies the first node of the spatial resource index set occupied by the synchronization signal through signaling indication and / or pre-configuration (or agreed rules). For example, if there are X candidate spatial resource indexes, the second node notifies the first node of the X1 spatial resource index set occupied by the synchronization signal through X bits. The first node then determines the spatial resource index set based on the X1 spatial resource indexes and the aforementioned association.

[0094] As mentioned above Figure 9 As shown, in synchronization signal period n, the second node notifies the first node that the set of airspace resource indexes occupied and / or transmitted by the synchronization signal is {0,1,2}. The first and second nodes then, based on the aforementioned association and the occupied airspace resource index sets, determine the set of indexes for the first resource on each of at least two second resources, thereby determining the set of transmission opportunity indexes occupied by the synchronization signal in each synchronization signal period.

[0095] As mentioned above Figure 8 As shown, the set of airspace resource indices for which the second node notifies the first node of the synchronization signal occupancy and / or transmission is {0-5}. During synchronization signal period n, the set of indices for the first resource is the transmission opportunity {0,1,2,3,4,5}, and during synchronization signal period n+10, the set of indices for the first resource is the transmission opportunity {0,1,2,3,4,7}.

[0096] In some other embodiments, another method for receiving a synchronization signal may include: first, determining a set of indexes for a target airspace resource from a plurality of airspace resource indices of the synchronization signal; the target airspace resource belongs to a plurality of airspace resources corresponding to the plurality of airspace resource indices of the synchronization signal. Optionally, the target airspace resource index is the index of the target airspace resource occupied by the synchronization signal among the plurality of airspace resource indices.

[0097] like Figure 10 As shown, a system message time window includes multiple synchronization signal periods. In synchronization signal period n, the set of spatial resource indexes occupied and / or sent by the second node to the first node is {2~5}. The set of spatial resource indexes actually occupied by the synchronization signal can be any one of the X candidate spatial resource index sets, and the smallest spatial resource index in the occupied spatial resource index set does not have to be 0.

[0098] It should be noted that the spatial resource index occupied by the synchronization signal can be continuous or non-continuous, and this embodiment of the present disclosure does not limit this.

[0099] Next, the target parameters are determined based on the index set of the target first resource.

[0100] In one possible implementation, when the second node notifies the first node, it does not notify the set of transmission opportunity indices occupied by the synchronization signal among the X candidate transmission opportunity indices, but rather the set of spatial resource indices actually occupied. Because the transmission opportunity indices occupied by the synchronization signal differ across periods, while the set of spatial resource indices remains the same across periods, it eliminates the need to notify the synchronization signal of the set of transmission opportunity indices occupied in each synchronization signal period, thus saving signaling overhead.

[0101] In one possible implementation, when determining the target parameter based on the index set of the target first resource, this step specifically includes: determining the index set of the target first resource corresponding to the target spatial domain resource index from multiple first resource indexes based on the association relationship; and determining the target parameter based on the index set of the target first resource. That is, when determining the target parameter through the target spatial domain resource, the target first resource corresponding to the target spatial domain resource is first determined based on the association relationship, and then the target parameter is determined based on the target first resource.

[0102] In some other embodiments, a synchronization signal is received on at least one of a plurality of first resources based on a spatial resource corresponding to at least one spatial resource index, wherein at least one first resource and at least one spatial resource index are associated. For example, a synchronization signal is received on a target first resource based on a target spatial resource.

[0103] In one possible implementation, such as Figure 11 As shown, prior to S401 above, the method further includes: S1101, the first node determines the association relationship. For example, the first node determines the association relationship based on a pre-defined association relationship.

[0104] The first node can first determine the association relationship, and based on the association relationship, receive the synchronization signal on the target first resource according to the beam corresponding to the target airspace resource index.

[0105] Alternatively, following S401 above, the method further includes: S1102, determining the association relationship. The first node may first receive the synchronization signal transmitted by the beam. After determining the synchronization signal with the best measurement performance, it may detect the system message or broadcast message sent by the base station, or determine the association relationship based on the PCI of the detected synchronization signal. Based on the association relationship, it may determine the spatial resource index corresponding to the synchronization signal, and further determine the beam with the best performance, thereby feeding back the beam with the best performance to the second node, and / or determining other target parameters based on the association relationship.

[0106] It should be noted that the target parameters include at least one of the following: a synchronization signal as a measurement reference signal, a quasi-co-location reference signal for the target signal, large-scale parameters of the target signal, rate matching information of the target signal, detection opportunities of the common control channel, a resource pool for uplink access signals, an index set of target first resources occupied by the synchronization signal, resources for the uplink access signal, and a first resource set for receiving the synchronization signal. Optionally, the target signal can be any signal or a signal specified by the second node. The first node transmits the target signal based on the determined target parameters. Similarly, the second node determines the target parameters based on at least one of the target spatial resource index and the target first resource index set, and transmits the target signal based on the determined target parameters.

[0107] In one possible implementation, prior to S1102 above, the method may further include S1103, where the first node receives a system message.

[0108] The target parameters will be described below.

[0109] (1) The target parameters include the synchronization signal, which serves as the measurement reference signal.

[0110] When the synchronization signal is used as the measurement reference signal, the second node can notify the first node of the target airspace resource index set. The first node, based on the target airspace resource index set and the aforementioned correlation, can determine the target first resource index occupied by the synchronization signal, measure the synchronization signal on the target first resource, and then report the measurement result to the second node. In this case, the target parameters determined by the first node based on the target airspace resource index set serve as the measurement reference signal.

[0111] When the set of target airspace resource indexes notified by the second node includes multiple target airspace resource indexes, the first node selects at least one target airspace resource index from these multiple indexes for measurement. Optionally, the transmission beam corresponding to the selected at least one target airspace resource index is the transmission beam with the best performance reaching the first node. Therefore, the first node reports at least one target airspace resource index to the second node, so that the second node knows which transmission beam has the best performance. For example, as described above. Figure 10 As shown, the second node is configured with a synchronization signal of spatial resource index 2 as the measurement reference signal. The synchronization signal corresponding to spatial resource index 2 is the synchronization signal transmitted by transmission opportunity SS2 in synchronization signal period n and the synchronization signal transmitted by transmission opportunity SS1 in synchronization signal period n+1. The synchronization signals of transmission opportunity SS2 in period n and transmission opportunity SS1 in period n+1 are measured respectively, and the results are used as the measurement results for spatial resource index 2. At this time, the second node is configured with the spatial resource index, not the first resource index.

[0112] (2) Quasi-co-located reference signal of the target signal or large-scale parameters of the target signal

[0113] The first node determines the target airspace resource index occupied by the synchronization signal through the signaling or agreed rules configured by the second node, and determines the target first resource where the synchronization signal is located based on the aforementioned correlation. This synchronization signal is the quasi-co-address reference signal of the target signal, that is, the quasi-co-address reference signal is the synchronization signal on the transmission opportunity corresponding to the airspace resource index. At this time, the target parameters determined by the first node are the quasi-co-address reference signals of the target signal.

[0114] The agreed-upon rules include determining the quasi-co-address reference signal of the target signal based on the spatial index selected by the first node during uplink access. The target signal includes at least one of the following: a channel signal, a demodulation reference signal, and a measurement reference signal. Alternatively, the large-scale channel parameters of the target signal can be obtained based on the large-scale channel parameters of the spatial resource index. The large-scale channel parameters corresponding to a spatial resource index of the synchronization signal are obtained based on the synchronization signal on the first resource associated with that spatial resource index. As described above... Figure 10As shown, the large-scale channel parameters of Spatial Resource Index 2 are obtained by measuring the synchronization signal on the synchronization signal transmission opportunity SS2 on synchronization signal period n and / or the synchronization signal on the synchronization signal transmission opportunity SS1 on synchronization signal period n+1. That is, when the synchronization signal is used as the quasi-co-location reference signal for the target signal, the spatial resource index of the synchronization signal is configured, not the transmission opportunity index. For example, the spatial resource index of the synchronization signal is configured in the transmission control indicator (TCI), not the transmission opportunity index.

[0115] (3) Resource pool information for uplink access signals

[0116] The first node can receive a synchronization signal based on a target spatial resource index, select at least one spatial resource index from the target spatial resource index, and determine the resources for the uplink access signal based on the selected at least one spatial resource index. Determining the resources for the uplink access signal based on the selected at least one spatial resource index includes: selecting at least one resource for the uplink access signal from the resource pool corresponding to the selected at least one spatial resource index, and transmitting the uplink access signal on the selected resources. The resource pool for the uplink access signal can be determined through at least one of the following methods.

[0117] Method 1: The first node determines the resource pool information of the uplink access signal corresponding to the selected at least one airspace resource index based on the first correspondence relationship and the selected at least one airspace resource index. The first correspondence relationship is the correspondence between the target airspace resource index and the resource pool of the uplink access signal.

[0118] The first node can determine the physical random access channel (PRACH) resource pool (i.e., the uplink access signal resource pool) corresponding to the synchronization signal based on the target spatial resource index. There is a one-to-one correspondence between the X1 spatial resources (i.e., target spatial resources) of the synchronization signal and the X1 PRACH resource pools. Each PRACH resource pool in the X1 PRACH resource pools includes at least one PRACH resource. A PRACH resource includes at least one of the following: time-domain resources, frequency-domain resources, and code-domain resources occupied by the uplink access signal. The first node selects at least one spatial resource from the X1 spatial resources and determines at least one corresponding PRACH resource pool based on the at least one spatial resource. From the determined at least one PRACH resource pool, at least one PRACH resource is selected to transmit the uplink access signal.

[0119] It should be noted that the correspondence between target airspace resources and PRACH resource pools remains the same across different target airspace resource and PRACH resource pool periods. For example... Figure 12 As shown, each of the X1 spatial resources in a corresponding period corresponds to at least one PRACH resource pool, and the number of PRACH resource pools is the same in different corresponding periods. In the first corresponding period, the spatial resource index 0 of the synchronization signal is mapped sequentially to PRACH resource pools 0 to 3. In the second corresponding period, the mapping also starts from the spatial resource index 0 of the synchronization signal and is sequentially mapped to PRACH resource pools 0 to 3.

[0120] Method 2 is similar to Method 1, except that the correspondence between the X1 spatial resources and X1 PRACH resource pools of the synchronization signal can differ in different correspondence periods. For example, the first correspondence between the X1 spatial resources and X1 PRACH resource pools can be determined based on at least one of the following: the corresponding period index of the first correspondence where the uplink access signal resource is located, the period index of the synchronization signal, or the starting resource index. The starting resource index is the first resource index used to determine the beginning of the first correspondence within a corresponding period of the first correspondence, or the starting spatial resource index, or the starting uplink access signal resource index. Each spatial resource index in one or more spatial resource indices corresponds to one or more uplink access signal resource pools. For example... Figure 13 As shown, in the first corresponding period, the spatial resource index 0 of the synchronization signal is sequentially mapped to PRACH resource pools 0 to 3. In the second corresponding period, the spatial resource index 2 of the synchronization signal is sequentially mapped to PRACH resource pools 0 to 3.

[0121] Method 3: The first node determines at least one target first resource from multiple first resource indices. Based on the target first resource and the second resource containing it, the first node determines at least one resource pool for uplink access signals corresponding to the target first resource. The first node sends an uplink access signal based on the resource pool of at least one uplink access signal, and / or determines the resources available for the target signal based on the resource pool of at least one uplink access signal. For example, the first and second nodes agree to determine a third correspondence between X candidate first resources and X PRACH resource pools. The first node selects different indices for the target first resource in different periods of the synchronization signal, resulting in different determined PRACH resource pools. Alternatively, the determined X1 first resource indices differ in different periods of the synchronization signal. Based on the X1 first resource indices and the third correspondence, the X1 PRACH resource pools determined from the X PRACH resource pools are different. The first node selects at least one first resource from the X1 first resources, determines at least one PRACH resource pool based on the selected at least one first resource and the third correspondence, and selects one PRACH resource from the determined at least one PRACH resource pool to send a PRACH (i.e., an uplink access signal). This can also be described as establishing a correspondence between X1 first resources (i.e., target first resources) and X1 PRACH resource pools in each cycle of the synchronization signal or each corresponding cycle of the third correspondence. The determination parameters of the third correspondence include the second resource index. The first node can determine the PRACH resource pool based on the selected first resource and the synchronization signal cycle index of the selected first resource. PRACH resources are then determined within the determined PRACH resource pool, and uplink access signals are transmitted within the determined PRACH resources.

[0122] The first and second nodes can agree on the correspondence between the synchronization signal period and the PRACH resource pools. That is, the determination of the correspondence between X1 first resources and X1 PRACH resource pools includes not only the index of the target first resource but also the index of the second resource. This achieves the same effect as Methods 1 and 2 in Method 3: the target spatial resource corresponding to the PRACH resource pool selected by the first node is the same as the target spatial resource corresponding to the first resource selected by the first node; only the implementation method of the first node is different. The difference between Methods 1 and 3 is that in Method 1, the first correspondence does not differ with the second resource, and the determined indexes of the X1 PRACH resource pools should also not differ with different second resources. In Method 3, the determined indexes of the X1 PRACH resource pools also differ with different second resources. The third correspondence differs (or is the same) with different second resources.

[0123] In the above method, after the first node determines the PRACH resource pool, it sends an uplink access signal based on the determined PRACH resource pool. The first node can also determine the resources that other signals can occupy based on the determined PRACH resource pool. For example, other signals cannot occupy at least one of the time-domain and frequency-domain resources occupied by the PRACH resource pool. In different second resources, the determined X1 PRACH resource pools are different, and therefore the X1 PRACH resource pools that other signals cannot occupy are also different.

[0124] (4) Detection opportunities of the common control channel

[0125] There are several ways to determine the detection opportunities for the common control channel, which will be described below.

[0126] Method A: The first node determines the detection opportunity of the common control channel corresponding to the target airspace resource index based on the second correspondence and the target airspace resource index; the second correspondence is the correspondence between candidate airspace resources and the detection opportunities of the common control channel. The second correspondence is determined based on at least one of the following: the periodic index of the synchronization signal, and the periodic index of the second correspondence. In one period of the second correspondence, each airspace resource in the multiple airspace resources corresponds to a set of detection opportunities of the common control channel.

[0127] The first node can determine the correspondence between X candidate spatial resource indices and X detection opportunities for common control channels. Further, the quasi-co-address reference signal for the common control channel is the synchronization signal corresponding to the target spatial resource index that has a second correspondence with the detection opportunities of the common control channel. Alternatively, the channel scale parameter of the common control channel can be obtained based on the channel scale parameter of the target spatial resource that has a second correspondence with the detection opportunities of the common control channel. The first or third correspondence focuses on X1 spatial resource indices, while the second correspondence involves X candidate spatial resource indices, not X1 spatial resource indices selected from the X candidate spatial resource indices, because when detecting the common control channel, the first node does not yet know the X1 spatial resource indices, but only the X candidate spatial resource indices. Of course, after the first node connects and knows the X1 spatial resource indices, the second correspondence can be updated to the correspondence between X1 target spatial resource indices and X detection opportunities for the common control channel. When determining the PRACH resource pool, the X1 spatial resource indices are already known.

[0128] The large-scale channel parameters corresponding to a spatial resource index of the synchronization signal are obtained from the synchronization signal on the first resource associated with that spatial resource index. The detection opportunity for the common control channel is determined based on the target spatial resource index, and the common control channel is detected at the determined detection opportunity. Optionally, the correspondence between the spatial resource indices of different synchronization signals and the detection opportunities of the common control channel is the same within the corresponding period. Figure 14 As shown, in the first corresponding period, detection opportunity 0 of the common control channel corresponds to spatial resource index 0, and detection opportunity 1 of the common control channel corresponds to spatial resource index 1. In the second corresponding period, detection opportunity 0 of the common control channel corresponds to spatial resource index 0, and detection opportunity 1 of the common control channel corresponds to spatial resource index 1. However, it is not impossible that the correspondence between the spatial resource index of the synchronization signal and the detection opportunity of the common control channel may differ in different corresponding periods. For example... Figure 15 As shown, in the first corresponding period, detection opportunity 0 of the common control channel corresponds to spatial resource index 0, and detection opportunity 1 of the common control channel corresponds to spatial resource index 1. In the second corresponding period, detection opportunity 0 of the common control channel corresponds to spatial resource index 1, and detection opportunity 1 of the common control channel corresponds to spatial resource index 0. Figure 14 and Figure 15 Different detection opportunities for the common control channel are distinguished by time division, and this embodiment does not exclude the use of any one or more of time division, frequency division, and code division for distinction. Optionally, the correspondence between the spatial resource index of a synchronization signal and the detection opportunity of the common control channel corresponds to the period of a synchronization signal.

[0129] Method B: The first node can determine a fourth correspondence between the candidate first resource and the detection opportunities of the common control channel. The first node determines the detection opportunity of the common control channel based on the fourth correspondence, the selected target first resource index, and the synchronization signal period index of the selected target first resource index. The large-scale channel parameters of the common control channel are obtained from the spatial resources corresponding to the target first resource index selected by the first node, and the quasi-co-location reference signal of the common control channel is the synchronization signal on the first resource corresponding to the spatial resource index selected by the first node.

[0130] Both methods A and B ensure that the spatial resources corresponding to the first resource selected by the first node are the same as the spatial resources corresponding to the detection opportunities of the determined common control channel. However, method A establishes a second correspondence between spatial resource indices and detection opportunities; this second correspondence is consistent with the second resource, and the set of indices for the X1 detection opportunities corresponding to X1 spatial resources is the same. Method B, on the other hand, establishes a correspondence between the first resource and detection opportunities; this correspondence may differ with the second resource, or it may not differ, but because the set of first resources determined in each second resource based on the association relationship may be different, the determined X1 detection opportunities corresponding to the first resource may also differ with the second resource. For example, in the second resource with index n, the determined X1 detection opportunities are detection opportunities {0, 3}, and in the second resource with index n+1, the determined X1 detection opportunities are detection opportunities {2, 5}.

[0131] Common control channels include control channels for scheduling, system message data channels, or control channels for directly notifying system messages. Methods A and B described above can also be used to determine the transmission opportunity (i.e., the first resource) of the broadcast channel. For example, the detection opportunity of the common control channel in methods A and B can be replaced with the transmission opportunity of the broadcast channel.

[0132] (5) Rate matching information of the target signal

[0133] In one possible implementation, an uplink access signal is sent based on a determined resource pool of uplink access signals, and / or, resources for the uplink access signals are determined based on the determined resource pool of uplink access signals, the resources of the uplink access signals including resources available for the target signal.

[0134] After determining the set of target spatial domain resource indices, the first resource index set occupied by the synchronization signal can be determined based on the target spatial domain resource index set. Next, the resources that other signals can occupy can be determined based on the first resource index set occupied by the synchronization signal, i.e., rate matching. For example, other signals (i.e., the target signal) cannot occupy resources in the first resource index set occupied by the synchronization signal, but can occupy resources from X candidate first resources other than those in the first resource index set occupied by the synchronization signal. These resources can include at least one of the following: physical resource block (PRB), RE, or orthogonal frequency division multiplexing (OFDM) symbols. For example, when the resource is an OFDM symbol, other signals cannot occupy the OFDM symbols identified in the first resource index set.

[0135] In the time-domain resources occupied by the synchronization signal, the synchronization signal and other signals in this time-domain resources satisfy a quasi-co-address relationship regarding spatial reception parameters. When the second node notifies the synchronization signal information used to determine the rate matching information of other signals, the second node also notifies the aforementioned set of spatial resource indices. The first node determines transmission opportunities based on the notified set of spatial resource indices, and determines the resources that other signals cannot occupy based on the determined transmission opportunities. That is, when the rate matching information of other signals includes synchronization signal information, the second node does not notify the transmission opportunity index of the synchronization signal, but rather notifies the set index of spatial resources occupied by the synchronization signal. The transmission opportunities occupied by the synchronization signal are obtained through the notified set of spatial resource indices of the synchronization signal and the aforementioned correlation, thereby obtaining the resources that other signals cannot occupy occupied by the synchronization signal. The resources that other signals cannot occupy are determined through the synchronization signal information in the rate matching information of other signals.

[0136] In another possible implementation, X candidate synchronization signal transmission opportunities occupy the same pattern within 5ms in different synchronization signal cycles, but the index of the occupied 5ms differs in different synchronization signal cycles. For example, the X candidate synchronization signal transmission opportunities occupy X time-domain resources within 5ms. In the nth synchronization signal cycle, the time-domain symbol with index {y, y+M, y+2*M, y+3M} is occupied in the third 5ms of the four 5ms in this 20ms cycle, where y is the starting symbol of the occupied X time-domain resources and M is a positive integer. Similarly, in the (n+1)th synchronization signal cycle, the time-domain symbol with index {y, y+M, y+2*M, y+3M} is occupied in the first 5ms of the four 5ms in this 20ms cycle. The index of the 5ms occupied within a synchronization signal cycle is obtained based on a second resource index (e.g., synchronization signal cycle, frame, half-frame).

[0137] In one possible implementation, different synchronization signal periods refer to a time window of system messages, where the system messages include information related to the synchronization signals. For example, the transmission parameters of the synchronization signals can be changed through system messages, and the transmission parameters of synchronization signals belonging to different system message time windows can be changed. For instance, synchronization signals with the same synchronization signal index in different synchronization signal periods belonging to different system message time windows do not satisfy a quasi-co-address relationship. Within a system message time window, the system messages remain unchanged.

[0138] In another possible implementation, the number of first resources of the synchronization signal is equal to the number of spatial resources of the synchronization signal. Of course, this embodiment does not exclude the possibility that the number of transmission opportunities of the synchronization signal is greater than the number of spatial resources of the synchronization signal. For example, in one synchronization signal cycle, multiple transmission opportunities of the synchronization signal correspond to one spatial resource of the synchronization signal.

[0139] In some embodiments, the first node determines at least one target first resource index among a plurality of first resource indices, wherein the target first resource is a first resource occupied by a synchronization signal; the first node determines the detection opportunity of the common control channel corresponding to the target first resource based on the second resource where the target first resource is located; the first node detects the common control channel on the detection opportunity of the common control channel corresponding to the target first resource. Thus, when determining the detection opportunity of the common control channel, the detection opportunity of the common control channel is determined by determining the target first resource index and, based on the second resource where the target first resource is located, in combination with the fourth correspondence.

[0140] In this embodiment, the first node can determine the association between X candidate transmission opportunities (i.e., first resources) of synchronization signals and Y candidate airspace resources. That is, the association is between all candidate transmission opportunities and all candidate airspace resources, referred to as the first type of association. This embodiment also does not exclude selecting X transmission opportunities from X² candidate transmission opportunities and determining Y airspace resource indices from Y² candidate airspace resources. The aforementioned association is between the X transmission opportunities and the Y airspace resource indices, wherein the synchronization signal occupies each of the X transmission opportunities. Here, Y is a positive integer greater than or equal to X. Any synchronization signal period includes the X² candidate transmission opportunities, and different synchronization signal periods include the X transmission opportunities. Furthermore, in different synchronization signal periods, the transmission opportunity indices occupied by the X transmission opportunities in the X² candidate transmission opportunities may be the same or different. In this case, the correlation is not between all candidate transmission opportunities and all candidate spatial resources, but rather between the transmission opportunities occupied by the synchronization signal and the spatial resources occupied by the synchronization signal. The transmission opportunities occupied by the synchronization signal belong to the set of all candidate transmission opportunities, and the spatial resources occupied by the synchronization signal belong to the set of all candidate spatial resources. This is called the second type of correlation. The first type of correlation can achieve beam randomization between cells, as well as randomization of the first resources occupied by the synchronization signal between cells, especially when the transmission opportunities occupied by the synchronization signal are a subset of all candidate transmission opportunities. The second type of correlation can only achieve beam randomization between cells, not randomization of the first resources, but it can reduce the complexity of synchronization signal detection for the terminal. The synchronization signal occupies the same set of first resources in different second resources, which is convenient for base stations and terminals. In summary, if the first type of correlation is used, the index set of the first resources occupied by the synchronization signal can be different in different second resources, and the spatial resources corresponding to the same index of the first resource can be different. If the second type of correlation is used, the index set of the first resources occupied by the synchronization signal is the same in different second resources, and the spatial resources corresponding to the same index of the first resource can be different. The relationships in this article include one or more of the first type of relationship and the second type of relationship.

[0141] In one implementation, the index of the first resource is determined by sequentially increasing (or decreasing) the index size of the first resource corresponding to one of the following: time-domain resource, frequency-domain resource, and code-domain resource. If multiple first resources are multiplexed using time-division and code-division multiplexing, the index of the first resource is first increased by the code-domain resource index, then by the time-domain resource index. If multiple first resources are multiplexed using frequency-division and code-division multiplexing, the index of the first resource is first increased by the code-domain resource index, then by the frequency-domain resource index. If multiple first resources are multiplexed using time-division, frequency-division, and code-division multiplexing, the index of the first resource is first increased by the code-domain resource index, then by the frequency-domain resource index, and finally by the frequency-domain resource index.

[0142] In one implementation, the first resource index in the association relationship is an absolute index among multiple candidate first resources. This indexing method is suitable for both the first and second association relationships. In another implementation, the first resource index in the association relationship is a relative index, where the first resource index is an index within a target set of first resources, selected from the candidate first resources and being a subset of the candidate first resource set. This indexing method is suitable for the second association relationship.

[0143] When determining PRACH resources, the first correspondence is established between X1 spatial resource indices and Z PRACH resource pools, not between the X spatial resource indices and Z PRACH resource pools. This is because at this point, the terminal can already obtain the set of X1 spatial resource indices occupied by the synchronization signal from the X spatial resource indices based on the common message. However, when determining the detection opportunity for the common control channel, the second correspondence is established between X candidate spatial resource indices and Z1 common control channel detection opportunity groups, not between the X1 spatial resource indices occupied by the synchronization signal and the Z1 common control channel detection opportunity groups. This is because at this point, some first nodes only know the X candidate spatial resource indices and not the X1 spatial resources occupied by the synchronization signal. Z and Z1 are both positive integers.

[0144] In summary, in the design of NR, the time-domain transmission opportunity index and the spatial domain resource index of the synchronization signal are bound together, so the time-domain transmission opportunity index of the synchronization signal equals the spatial resource index. However, by debinding these two bindings and reducing and / or randomizing inter-cell interference (including interference between synchronization signals and interference between synchronization signals and other signals), we can achieve a more balanced access duration for different spatial beams. In this case, the synchronization signal transmission opportunity index and the synchronization signal spatial index are no longer equal. Therefore, in subsequent applications, the synchronization signal spatial resource index should be used instead of the synchronization signal transmission opportunity index. The application includes: determining at least one of the following based on the spatial resource index: PRACH resource pool, PRACH resources, synchronization signal for measurement, quasi-co-addressable reference signal for the target signal, large-scale channel parameters of the target signal, and opportunity to detect the common control channel; the second node selecting a subset of spatial resources for transmitting synchronization signals from the candidate spatial resource set; the second node selecting a subset of transmission opportunities for transmitting synchronization signals from the candidate transmission opportunity set; determining rate matching information for other signals; the first node selecting a subset of spatial resources for receiving synchronization signals from the candidate spatial resource set; and the second node selecting a subset of transmission opportunities for transmitting synchronization signals from the candidate transmission opportunity set. The multiple synchronization signal transmission opportunities included in a synchronization signal cycle are not only time-division multiplexing opportunities; these multiple synchronization signal transmission opportunities can employ one or more of the following multiplexing methods: code division, time division, and frequency division.

[0145] The synchronization signal transmission method provided in this disclosure can be applied to... Figure 3 The second node 302 in the communication system shown. Figure 16 A flowchart of a synchronization signal transmission method is shown. Figure 2 ,like Figure 16 As shown, the synchronization signal transmission method includes:

[0146] S1601. The second node obtains the association between the first resource index of the synchronization signal and the spatial resource index of the synchronization signal based on the second resource index.

[0147] The second resource index can be used to index multiple second resources of the synchronization signal, and the first resource can include time-domain resources. A second resource containing the synchronization signal includes at least one first resource. For example, a cycle may include multiple time-domain resources.

[0148] In one possible implementation, the temporal resource index and spatial resource index maintain a fixed association within different synchronization signal periods. When inter-cell synchronization signal interference occurs, the interference persists due to the fixed association, failing to reduce the interference. To address this issue, the association between the first resource index and the spatial resource index can be decoupled, and a new association can be established for each synchronization signal period. The second node can then determine the association between the first resource index and the spatial resource index based on the second resource index and send the synchronization signal accordingly. Thus, when inter-cell synchronization signal interference occurs, the association between different synchronization signal periods is no longer fixed, preventing the previously interfering synchronization signal from interfering further. This achieves interference randomization and reduces inter-cell synchronization signal interference.

[0149] S1602. The second node sends a synchronization signal according to the association relationship.

[0150] After determining the association relationship, the second node can determine the index set of the target first resources occupied by the synchronization signal in the second resource based on the second resource index of the synchronization signal to be transmitted and the association relationship. On each target first resource, the synchronization signal is transmitted using the spatial resource corresponding to the spatial resource index that has the association relationship with the target first resource. The association relationships in different second resources are different, thereby realizing the randomization of inter-cell synchronization signal interference and reducing inter-cell synchronization signal interference.

[0151] It should be noted that the contents regarding the first resource, the second resource, etc., can be referred to the contents of the first node side mentioned above, and will not be repeated here in this disclosure embodiment.

[0152] It is understood that, in order to achieve the above-mentioned functions, the synchronization signal transmission device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the algorithmic steps of the examples described in conjunction with the embodiments of this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0153] This disclosure embodiment can divide the synchronization signal transmission device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0154] Figure 17 This is a schematic diagram of a communication device provided in an embodiment of this disclosure. The communication device can execute the synchronization signal transmission method provided in the above-described method embodiments. Figure 17 As shown, the communication device includes: a receiving unit 1701.

[0155] The receiving unit 1701 is used to receive a synchronization signal, which is sent based on an association relationship. The association relationship includes the association relationship between a plurality of first resource indices of the synchronization signal and a plurality of spatial resource indices of the synchronization signal, and the association relationship is determined according to a second resource index.

[0156] In one possible implementation, the first resource index is used to index at least one of the following: the time-domain resource of the synchronization signal, the frequency-domain resource of the synchronization signal, and the code-domain resource of the synchronization signal. In one possible implementation, the second resource index includes at least one of the following: the period index, the half-frame index, and the frame index of the synchronization signal. In one possible implementation, a second resource corresponding to one second resource index includes multiple first resources corresponding to multiple first resource indices of the synchronization signal; and / or,

[0157] In at least two second resources corresponding to at least two second resource indices, the patterns occupied by the multiple first resources corresponding to the multiple first resource indices of the synchronization signal are the same.

[0158] In one possible implementation, the association is determined based on at least one of the following: a received instruction message, a pre-agreed association, a cell index, a cell group index, and a second resource index.

[0159] In one possible implementation, among at least two second resources corresponding to at least two second resource indices, the first resource indices corresponding to the same spatial resource index are different.

[0160] In one possible implementation, the synchronization signal occupies the same number of target first resources in at least two second resources corresponding to at least two second resource indices, and the target first resources are multiple first resources belonging to the multiple first resource indices.

[0161] In one possible implementation, among at least two second resources corresponding to at least two second resource indices, the synchronization signals on two first resources corresponding to two first resource indices with the same spatial resource index satisfy a quasi-co-address relationship.

[0162] In one possible implementation, the synchronization signal that satisfies the quasi-co-location relationship is also associated with at least one of the following: cell index, cell group index, frequency domain resource, code domain resource, and transmission opportunity group.

[0163] In one possible implementation, among at least two second resources corresponding to at least two second resource indices, the two first resource indices associated with the same spatial resource index are different.

[0164] In one possible implementation, the first resource corresponding to the first resource index includes code domain resources, and the code domain resources include cell group indexes, wherein at least one cell index in a cell group index has the same parameter value for a first type of parameter, and the parameter value for a second type of parameter of each cell index in a cell group index is determined respectively.

[0165] In one possible implementation, the device further includes: a determining unit 1702; the determining unit 1702 is configured to determine, according to the association relationship, an index set of a target first resource in at least two second resources corresponding to at least two second resource indexes, wherein the target first resource belongs to a plurality of first resources corresponding to the plurality of first resource indexes.

[0166] In one possible implementation, the determining unit 1702 is further configured to determine target parameters based on the index set of the target first resource.

[0167] In one possible implementation, the determining unit 1702 is further configured to determine an index set of target airspace resources from a plurality of airspace resource indices of the synchronization signal; the target airspace resources belong to a plurality of airspace resources corresponding to the plurality of airspace resource indices of the synchronization signal.

[0168] In one possible implementation, the determining unit 1702 is further configured to determine target parameters based on the index set of the target airspace resources.

[0169] The determining unit 1702 is specifically used to: determine the index set of the target first resource corresponding to the target airspace resource index from the plurality of first resource indexes based on the association relationship;

[0170] The target parameters are determined based on the index set of the target first resource.

[0171] In one possible implementation, the target parameters include at least one of the following: a synchronization signal as a measurement reference signal, a quasi-co-location reference signal for the target signal, large-scale parameters of the target signal, rate matching information of the target signal, detection opportunities of the common control channel, a resource pool for the uplink access signal, an index set of the first resources occupied by the synchronization signal, resources of the uplink access signal, and a first resource set for receiving the synchronization signal.

[0172] In one possible implementation, when the target parameters include the resource pool of the uplink access signal, the resource pool of the uplink access signal is determined by the index of at least one selected target airspace resource and a first correspondence, wherein the first correspondence is the correspondence between the target airspace index in the index set of the target airspace resources and the resource pool of at least one uplink access signal, and wherein the index of the at least one selected target airspace resource belongs to the index set of the target airspace resources.

[0173] In one possible implementation, the first correspondence is determined based on at least one of the following: the corresponding period index of the first correspondence in which the uplink access signal resource is located, the synchronization signal period index, and the starting resource index; the starting resource index is a first resource index used to determine the start of the first correspondence in a corresponding period of the first correspondence.

[0174] In one possible implementation, when the target parameters include the detection opportunities of the common control channel, the detection opportunities of the common control channel are determined based on the index of at least one of the selected target airspace resources and a second correspondence, wherein the second correspondence is the correspondence between the plurality of airspace resource indices and the detection opportunities of the common control channel.

[0175] In one possible implementation, the second correspondence is determined based on at least one of the following: the period index of the synchronization signal, the corresponding period index of the second correspondence; and in a corresponding period of the second correspondence, each of the plurality of spatial resources corresponds to a set of detection opportunities for a common control channel.

[0176] In one possible implementation, the device further includes: a transmitting unit 1703; and a transmitting unit 1702, configured to transmit an uplink access signal based on the determined resource pool of the uplink access signal.

[0177] In one possible implementation, the determining unit 1702 is further configured to determine the resources of the uplink access signal based on the determined resource pool of the uplink access signal, wherein the resources of the uplink access signal include the resources that the target signal can occupy.

[0178] In one possible implementation, the receiving unit 1702 is further configured to receive the synchronization signal on one or more of the plurality of target first resources corresponding to the index set of the target first resource.

[0179] In one possible implementation, the receiving unit 1702 is specifically configured to receive the synchronization signal according to the association relationship.

[0180] In one possible implementation, the receiving unit 1702 is further configured to determine a first resource for receiving the synchronization signal based on the association relationship, and to receive the synchronization signal on the first resource for receiving the synchronization signal using a spatial resource corresponding to the spatial resource index that has the association relationship with the first resource for receiving the synchronization signal.

[0181] Figure 18 This is a schematic diagram of another communication device provided in this disclosure embodiment. The communication device can execute the synchronization signal transmission method provided in the above-described method embodiments. Figure 18 As shown, the communication device includes: a determining unit 1801 and a transmitting unit 1802.

[0182] The determining unit 1801 is used to obtain the association relationship between multiple first resource indices of the synchronization signal and multiple spatial resource indices of the synchronization signal based on the second resource index.

[0183] The transmitting unit 1802 is used to transmit the synchronization signal based on the association relationship.

[0184] In one possible implementation, the first resource index is used to index at least one of the following: the time-domain resources of the synchronization signal, the frequency-domain resources of the synchronization signal, and the code-domain resources of the synchronization signal.

[0185] In one possible implementation, the second resource index includes at least one of the following: the period index of the synchronization signal, the half-frame index of the synchronization signal, and the frame index of the synchronization signal.

[0186] In one possible implementation, a second resource corresponding to a second resource index includes a plurality of first resources corresponding to a plurality of first resource indices of the synchronization signal; and / or,

[0187] In at least two second resources corresponding to at least two second resource indices, the patterns occupied by the multiple first resources corresponding to the multiple first resource indices of the synchronization signal are the same.

[0188] In one possible implementation, the association is determined based on at least one of the following: a sent instruction message, a pre-agreed association, a cell index, a cell group index, and the second resource index.

[0189] In one possible implementation, synchronization signals in two first resources that are associated with the same spatial resource index in different second resources satisfy a quasi-co-address relationship.

[0190] In one possible implementation, among at least two second resources corresponding to at least two second resource indices, the first resource indices corresponding to the same spatial resource index are different.

[0191] In one possible implementation, the synchronization signal occupies the same number of target first resources in at least two second resources corresponding to at least two second resource indices, and the target first resources are multiple first resources belonging to the multiple first resource indices.

[0192] In one possible implementation, among at least two second resources corresponding to at least two second resource indices, the synchronization signals on two first resources corresponding to two first resource indices with the same spatial resource index satisfy a quasi-co-address relationship.

[0193] In one possible implementation, among at least two second resources corresponding to at least two second resource indices, the two first resource indices that are associated with the same spatial resource index are different.

[0194] In one possible implementation, the determining unit 1802 is further configured to determine, according to the association relationship, the index set of the target first resource occupied by the synchronization signal in at least two second resources corresponding to at least two second resource indices, wherein the target first resource belongs to the multiple first resources corresponding to the multiple first resource indices.

[0195] The determining unit 1802 is further configured to determine target parameters based on the index set of the target first resource.

[0196] In one possible implementation, the determining unit 1802 is further configured to determine an index set of target airspace resources from a plurality of airspace resource indices of the synchronization signal; the target airspace resources belong to a plurality of airspace resources corresponding to the plurality of airspace resource indices of the synchronization signal.

[0197] In one possible implementation, the determining unit 1802 is further configured to determine target parameters based on the target spatial domain resource index set.

[0198] In one possible implementation, the target parameters include at least one of the following: a synchronization signal as a measurement reference signal, a quasi-co-location reference signal for the target signal, large-scale parameters of the target signal, rate matching information of the target signal, detection opportunities of the common control channel, a resource pool for the uplink access signal, an index set of the target first resources occupied by the synchronization signal, resources of the uplink access signal, and a first resource set for receiving the synchronization signal.

[0199] In one possible implementation, the sending unit 1802 is specifically configured to: determine, in the second resource corresponding to the second resource index, a set of indexes of the target first resource for sending the synchronization signal according to the association relationship; and send the synchronization signal on one or more first resources corresponding to the set of indexes of the target first resource.

[0200] In one possible implementation, the sending unit 1802 is specifically configured to: send the synchronization signal on each of the first resources of the one or more resources using the spatial resource index corresponding to the spatial resource index that has the association relationship with the first resource.

[0201] In implementing the functionality of the integrated modules described above using hardware, this disclosure provides another possible structure for the communication device involved in the above embodiments. For example... Figure 19 As shown, the communication device 190 includes a processor 1902 and a bus 1904. Optionally, the communication device may also include a memory 1901; alternatively, the communication device may also include a communication interface 1903.

[0202] Processor 1902 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1902 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1902 may also be a combination of functions implementing computation, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0203] The communication interface 1903 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0204] The memory 1901 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0205] As one possible implementation, the memory 1901 can exist independently of the processor 1902. The memory 1901 can be connected to the processor 1902 via a bus 1904 and is used to store instructions or program code. When the processor 1902 calls and executes the instructions or program code stored in the memory 1901, it can implement the synchronization signal transmission method provided in the embodiments of this disclosure.

[0206] In another possible implementation, the memory 1901 can also be integrated with the processor 1902.

[0207] The 1904 bus can be an extended industry standard architecture (EISA) bus, etc. The 1904 bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 19 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0208] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform a synchronization signal transmission method as described in any of the above embodiments.

[0209] For example, the computer-readable storage media described above may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices for storing information and / or other machine-readable storage media. The term "machine-readable storage media" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0210] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the synchronization signal transmission method described in any of the above embodiments. The above descriptions are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions within the technical scope disclosed in this disclosure should be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A method for transmitting synchronous signals, characterized in that, Applied to the first node, the method includes: A synchronization signal is received, the synchronization signal being sent based on an association relationship, the association relationship including the association relationship between multiple first resource indices of the synchronization signal and multiple spatial resource indices of the synchronization signal, the association relationship being determined based on a second resource index.

2. The method according to claim 1, characterized in that, The first resource index is used to index at least one of the following: the time domain resources of the synchronization signal, the frequency domain resources of the synchronization signal, and the code domain resources of the synchronization signal.

3. The method according to claim 1, characterized in that, The second resource index includes at least one of the following: the period index, half-frame index, and frame index of the synchronization signal.

4. The method according to claim 1, characterized in that, A second resource corresponding to a second resource index includes multiple first resources corresponding to multiple first resource indices of the synchronization signal; and / or, In at least two second resources corresponding to at least two second resource indices, the patterns occupied by the multiple first resources corresponding to the multiple first resource indices of the synchronization signal are the same.

5. The method according to claim 1, characterized in that, The association is determined based on at least one of the following: a received instruction message, a pre-agreed association, a cell index, a cell group index, or a second resource index.

6. The method according to claim 1, characterized in that, In at least two second resources corresponding to at least two second resource indices, the first resource indices corresponding to the same spatial domain resource index are different.

7. The method according to claim 1, characterized in that, In at least two second resources corresponding to at least two second resource indices, the number of target first resources occupied by the synchronization signal is the same, and the target first resources are multiple first resources belonging to the multiple first resource indices.

8. The method according to claim 1, characterized in that, In at least two second resources corresponding to at least two second resource indices, the synchronization signals on the two first resources corresponding to the two first resource indices that are associated with the same spatial resource index satisfy a quasi-co-address relationship.

9. The method according to claim 8, characterized in that, Synchronization signals that satisfy the quasi-co-location relationship are also associated with at least one of the following: cell index, cell group index, frequency domain resource, code domain resource, and transmission opportunity group.

10. The method according to claim 8, characterized in that, In at least two second resources corresponding to at least two second resource indices, the two first resource indices that are associated with the same spatial resource index are different.

11. The method according to claim 1, characterized in that, The first resource corresponding to the first resource index includes code domain resources, and the code domain resources include cell group indexes. At least one cell index in a cell group index has the same parameter value for the first type of parameter, and the parameter value for the second type of parameter of each cell index in a cell group index is determined separately.

12. The method according to claim 1, characterized in that, The method further includes: In at least two second resources corresponding to at least two second resource indexes, an index set of the target first resource is determined according to the association relationship, wherein the target first resource belongs to the multiple first resources corresponding to the multiple first resource indexes.

13. The method according to claim 12, characterized in that, The method further includes: The target parameters are determined based on the index set of the target first resource.

14. The method according to claim 1, characterized in that, The method further includes: The target airspace resource index set is determined from the multiple airspace resource indices of the synchronization signal; the target airspace resource belongs to the multiple airspace resources corresponding to the multiple airspace resource indices of the synchronization signal.

15. The method according to claim 14, characterized in that, The method further includes: The target parameters are determined based on the index set of the target airspace resources.

16. The method according to claim 15, characterized in that, The step of determining the target parameters based on the target spatial domain resource index includes: Based on the aforementioned association, the set of indexes of the target first resource corresponding to the target spatial domain resource index is determined from the plurality of first resource indexes; The target parameters are determined based on the index set of the target first resource.

17. The method according to any one of claims 13-16, characterized in that, The target parameters include at least one of the following: a synchronization signal as a measurement reference signal, a quasi-co-location reference signal for the target signal, large-scale parameters of the target signal, rate matching information of the target signal, detection opportunities of the common control channel, a resource pool for the uplink access signal, an index set of the first resources occupied by the synchronization signal, resources of the uplink access signal, and a first resource set for receiving the synchronization signal.

18. The method according to claim 14, characterized in that, When the target parameters include the resource pool of the uplink access signal, the resource pool of the uplink access signal is determined by the index of at least one selected target airspace resource and a first correspondence relationship. The first correspondence relationship is the correspondence between the target airspace index in the index set of the target airspace resources and the resource pool of at least one uplink access signal, wherein the index of the at least one selected target airspace resource belongs to the index set of the target airspace resources.

19. The method according to claim 18, characterized in that, The first correspondence is determined based on at least one of the following: the corresponding period index of the first correspondence in which the uplink access signal resource is located, the synchronization signal period index, and the starting resource index; the starting resource index is a first resource index used to determine the start of the first correspondence in a corresponding period of the first correspondence.

20. The method according to claim 14, characterized in that, When the target parameters include the detection opportunity of the common control channel, the detection opportunity of the common control channel is determined based on the index of at least one of the selected target airspace resources and a second correspondence, wherein the second correspondence is the correspondence between the plurality of airspace resource indices and the detection opportunities of the common control channel.

21. The method according to claim 20, characterized in that, The second correspondence is determined based on at least one of the following: the period index of the synchronization signal, the corresponding period index of the second correspondence; in a corresponding period of the second correspondence, each of the plurality of spatial resources corresponds to a set of detection opportunities for a common control channel.

22. The method according to claim 18, characterized in that, When the target parameters include the resource pool information of the uplink access signal, the method further includes: Uplink access signals are sent based on the determined resource pool of uplink access signals, and / or, resources for uplink access signals are determined based on the determined resource pool of uplink access signals, wherein the resources for uplink access signals include resources available for the target signal.

23. The method according to claim 12 or 16, characterized in that, The method further includes: The synchronization signal is received on one or more of the multiple target first resources corresponding to the index set of the target first resource.

24. The method according to claim 1, characterized in that, The received synchronization signal includes: The synchronization signal is received according to the aforementioned association.

25. The method according to claim 24, characterized in that, The method further includes: Based on the association relationship, a first resource for receiving the synchronization signal is determined, and the synchronization signal is received on the first resource for receiving the synchronization signal using the spatial resource index corresponding to the spatial resource index that has the association relationship with the first resource for receiving the synchronization signal.

26. A method for transmitting a synchronization signal, characterized in that, Applied to the second node, the method includes: Based on the second resource index, obtain the association relationship between multiple first resource indices of the synchronization signal and multiple spatial resource indices of the synchronization signal; Based on the aforementioned association, the synchronization signal is sent.

27. The method according to claim 26, characterized in that, The first resource index is used to index at least one of the following: the time domain resources of the synchronization signal, the frequency domain resources of the synchronization signal, and the code domain resources of the synchronization signal.

28. The method according to claim 26, characterized in that, The second resource index includes at least one of the following: the period index, half-frame index, and frame index of the synchronization signal.

29. The method according to claim 26, characterized in that, A second resource corresponding to a second resource index includes multiple first resources corresponding to multiple first resource indices of the synchronization signal; and / or, In at least two second resources corresponding to at least two second resource indices, the patterns occupied by the multiple first resources corresponding to the multiple first resource indices of the synchronization signal are the same.

30. The method according to claim 26, characterized in that, The association is determined based on at least one of the following: a sent instruction message, a pre-agreed association, a cell index, a cell group index, and the second resource index.

31. The method according to claim 26, characterized in that, In at least two second resources corresponding to at least two second resource indices, the first resource indices corresponding to the same spatial domain resource index are different.

32. The method according to claim 26, characterized in that, In at least two second resources corresponding to at least two second resource indices, the number of target first resources occupied by the synchronization signal is the same, and the target first resources are multiple first resources belonging to the multiple first resource indices.

33. The method according to claim 26, characterized in that, In at least two second resources corresponding to at least two second resource indices, the synchronization signals on the two first resources corresponding to the two first resource indices of the same spatial resource index satisfy a quasi-co-address relationship.

34. The method according to claim 26, characterized in that, The method further includes: In at least two second resources corresponding to at least two second resource indices, the index set of the target first resource occupied by the synchronization signal is determined according to the association relationship, and the target first resource belongs to the multiple first resources corresponding to the multiple first resource indices; The target parameters are determined based on the index set of the target first resource.

35. The method according to claim 26, characterized in that, The method further includes: The target airspace resource is determined from a set of airspace resource indices of the synchronization signal; the target airspace resource belongs to a set of airspace resources corresponding to the multiple airspace resource indices of the synchronization signal. The target parameters are determined based on the target airspace resource index set.

36. The method according to claim 34 or 35, characterized in that, The target parameters include at least one of the following: a synchronization signal as a measurement reference signal, a quasi-co-location reference signal for the target signal, large-scale parameters of the target signal, rate matching information of the target signal, detection opportunities of the common control channel, a resource pool for the uplink access signal, an index set of the target first resources occupied by the synchronization signal, resources of the uplink access signal, and a first resource set for receiving the synchronization signal.

37. The method according to claim 26, characterized in that, Based on the aforementioned association, the synchronization signal is sent, including: In the second resource corresponding to the second resource index, the index set of the target first resource for sending the synchronization signal is determined according to the association relationship; The synchronization signal is sent on one or more first resources corresponding to the index set of the target first resource.

38. The method according to claim 37, characterized in that, Sending the synchronization signal on one or more first resources corresponding to the index set of the target first resource includes: On each of the one or more first resources, the synchronization signal is sent using the spatial resource corresponding to the spatial resource index that has the association relationship with the first resource.

39. An electronic device, characterized in that, include: Memory and processor; Memory and processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method as claimed in any one of claims 1-25 or any one of claims 26-38.

40. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method as claimed in any one of claims 1-25 or any one of claims 26-38.

41. A computer program product, characterized in that, The computer program product includes computing technology program instructions that, when executed by a processor, implement the method as claimed in any one of claims 1-25 or any one of claims 26-38.

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