Signal transmission method, device, node and storage medium

Abstract

The present invention discloses a signal transmission method, device, node and storage medium, which are applied to the field of wireless communication. The method includes a first communication node determining multiple access points in a coverage area, and controlling the multiple access points to send multiple synchronization signals and multiple MIBs, wherein the multiple synchronization signals constitute one or more synchronization signal groups. In this way, the first communication node controls the sending of one or more synchronization signal groups, so that the receiving end can use the strength of the synchronization signal in the synchronization signal group as a reference for accessing the wireless system, making the access selection more scientific, so as to avoid problems such as cell interference and frequent cell selection as much as possible.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular to a signal transmission method, device, node and storage medium. Background Art

[0002] The cell splitting technology in cellular networks is currently considered to be an effective way to increase the capacity of wireless systems. However, with the deployment of various low-power network nodes including microcells, small cells, home base stations and relay nodes in traditional cellular networks, cellular networks are becoming more and more heterogeneous and dense, which will cause serious interference between cells and frequent switching of user equipment (UE) during movement, which will reduce system capacity and user experience. In addition, the system capacity interference is limited when traditional cellular cells are densely networked. As the cell radius decreases, the system capacity has an obvious inflection point.

[0003] The current solution is to distribute multiple access points (APs) equipped with one or more antennas in a larger area in a cell-free system, transmit data to a central processing unit (CPU) through a fronthaul link, and use the same time-frequency resources to provide services for multiple UEs. In this system, each UE in a connected state has a cell centered on itself, and the cell moves with the UE during movement, which can minimize the impact of inter-cell interference, frequent switching and other problems on the UE. However, in a cell-free system, it is assumed that the UE will work in cell-free mode only after the Radio Resource Control (RRC) connection has been established. Before that, the UE needs to establish an RRC connection with a cell in the cellular network in the form of a cellular network, and then switch from the cellular system to the cell-free system.

[0004] However, the drawback of this method is that the cellular system and the cell-free system are designed based on two different design concepts. The former is base station-centric, and the latter is UE-centric. By piecing together two systems with different design concepts, when the UE accesses the system, it still faces serious inter-cell interference and the need for frequent cell selection / cell reselection and other problems. Summary of the invention

[0005] The main purpose of the embodiments of the present invention is to propose a signal transmission method, device, node and storage medium, aiming to enable access nodes to select access in a more scientific manner to avoid cell interference, frequent cell selection and other problems as much as possible.

[0006] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0007] The first communication node determines a plurality of access points within the coverage area;

[0008] The first communication node controls the plurality of access points to send a plurality of synchronization signals and a plurality of master information blocks (Master Information Block, MIB);

[0009] Among them, multiple synchronization signals constitute one or more synchronization signal groups.

[0010] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0011] The second communication node receives a plurality of synchronization signals and a plurality of MIBs;

[0012] wherein the plurality of synchronization signals constitute one or more synchronization signal groups;

[0013] The second communication node detects multiple synchronization signals and multiple MIBs;

[0014] The second communication node determines the accessed synchronization signal group according to the detection result, and obtains the MIB associated with the accessed synchronization signal group index.

[0015] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0016] The first communication node sends system information, where the system information includes configuration information of at least one physical random access channel (PRACH), where one PRACH is associated with one or more synchronization signal groups, and the synchronization signal group includes multiple synchronization signals;

[0017] The first communication node receives a random access preamble sent by the second communication node according to system information;

[0018] The first communication node sends a response message in a preset time window for the random access preamble.

[0019] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0020] The second communication node receives system information, where the system information includes configuration information of at least one PRACH, where one PRACH is associated with one or more synchronization signal groups;

[0021] The second communication node determines a target PRACH in at least one PRACH according to a signal parameter of a synchronization signal in the synchronization signal group;

[0022] The second communication node sends a random access preamble on the target PRACH.

[0023] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0024] After receiving the random access preamble sent by the second communication node on the preconfigured PRACH, the first communication node sends a first random access response message in a preset time window;

[0025] The first communication node sends a second random access response message according to the first random access response message;

[0026] The first random access response message carries a third quasi-co-location (QCL) relationship of the second random access response message.

[0027] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0028] The second communication node sends a random access preamble on a preconfigured PRACH;

[0029] The second communication node receives a first random access response message sent by the first communication node in response to the random access preamble in a preset time window;

[0030] The first random access response message carries the third QCL relationship of the second random access response message;

[0031] The second communication node receives a second random access response message according to the first random access response message.

[0032] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0033] The first communication node determines the working state of the second communication node;

[0034] When the working state is the connected state, the first communication node configures the service node topology information for the second communication node.

[0035] To achieve the above object, an embodiment of the present invention provides a signal transmission method, which includes the following steps:

[0036] The second communication node obtains the service node topology information configured by the first communication node;

[0037] When the second communication node determines that it is working in a non-connected state, the second communication node determines the relative position of the second communication node in the service node network according to the service node topology information and the current position of the second communication node;

[0038] The second communication node determines a detection method for the synchronization signal according to the relative position.

[0039] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0040] A determination module, used to determine multiple access points within the coverage area;

[0041] A control module, used for controlling multiple access points to send multiple synchronization signals and multiple MIBs;

[0042] Among them, multiple synchronization signals constitute one or more synchronization signal groups.

[0043] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0044] A receiving module, used for receiving multiple synchronization signals and multiple MIBs;

[0045] wherein the plurality of synchronization signals constitute one or more synchronization signal groups;

[0046] A detection module, used for detecting multiple synchronization signals and multiple MIBs;

[0047] A determination module, used to determine the accessed synchronization signal group according to the detection result;

[0048] The acquisition module is used to acquire the MIB associated with the accessed synchronization signal group index.

[0049] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0050] A sending module, used to send system information, where the system information includes configuration information of at least one PRACH, where one PRACH is associated with one or more synchronization signal groups, and the synchronization signal group includes multiple synchronization signals;

[0051] A receiving module, configured to receive a random access preamble sent by a second communication node according to system information;

[0052] The sending module is also used to send a response message in a preset time window for the random access preamble.

[0053] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0054] A receiving module, used to receive system information, where the system information includes configuration information of at least one PRACH, and one PRACH is associated with one or more synchronization signal groups;

[0055] A determination module, configured to determine a target PRACH in at least one PRACH according to a signal parameter of a synchronization signal in a synchronization signal group;

[0056] The sending module is used to send a random access preamble on a target PRACH.

[0057] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0058] A receiving module, configured to send a first random access response message in a preset time window after receiving a random access preamble sent by a second communication node on a preconfigured PRACH;

[0059] A sending module, configured to send a second random access response message according to the first random access response message;

[0060] The first random access response message carries the third QCL relationship of the second random access response message.

[0061] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0062] A sending module, used for sending a random access preamble on a preconfigured PRACH;

[0063] A receiving module, configured to receive a first random access response message sent by a first communication node in response to a random access preamble in a preset time window;

[0064] The first random access response message carries the third QCL relationship of the second random access response message;

[0065] The receiving module is further configured to receive a second random access response message according to the first random access response message.

[0066] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0067] A determination module, used to determine the working state of the second communication node;

[0068] The configuration module is used to configure the service node topology information for the second communication node when the working state is a connected state.

[0069] To achieve the above object, an embodiment of the present invention further provides a signal transmission device, which includes:

[0070] An acquisition module, used to acquire service node topology information configured by the first communication node;

[0071] A determination module, used to determine the relative position of the device in the service node network according to the service node topology information and the current location of the device when the device is working in a non-connected state;

[0072] The determination module is also used to determine the detection method of the synchronization signal according to the relative position.

[0073] To achieve the above objectives, an embodiment of the present invention further proposes a communication node, which includes: a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection communication between the processor and the memory. When the program is executed by the processor, the steps of the first communication node in the aforementioned method are implemented.

[0074] To achieve the above objectives, an embodiment of the present invention further proposes a communication node, which includes: a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection communication between the processor and the memory. When the program is executed by the processor, the steps of the second communication node in the aforementioned method are implemented.

[0075] To achieve the above objectives, the present invention provides a readable and writable storage medium for computer storage, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the first communication node in the aforementioned method.

[0076] To achieve the above objectives, the present invention provides a readable and writable storage medium for computer storage, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the second communication node in the aforementioned method.

[0077] The embodiment of the present application provides a signal transmission method, device, node and storage medium, the method comprising a first communication node determining multiple access points in a coverage area, and controlling the multiple access points to send multiple synchronization signals and multiple MIBs, wherein the multiple synchronization signals constitute one or more synchronization signal groups. In this way, the first communication node controls the sending of one or more synchronization signal groups, so that the receiving end can use the strength of the synchronization signal in the synchronization signal group as a reference for accessing the wireless system, making the access selection more scientific, so as to avoid problems such as cell interference and frequent cell selection as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0079] Figure 2It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0080] Figure 3 It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0081] Figure 4 It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0082] Figure 5 It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0083] Figure 6 It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0084] Figure 7 It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0085] Figure 8 It is a flow chart of a signal transmission method provided by an embodiment of the present invention.

[0086] Fig. 9 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0087] Fig.10 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0088] Fig.11 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0089] Fig.12 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0090] Fig.13 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0091] Fig.14 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0092] Fig.15 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0093] Fig.16 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the present invention.

[0094] Fig.17 It is a structural diagram of a communication node provided by an embodiment of the present invention.

[0095] Fig.18 It is a structural diagram of a communication node provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0096] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0097] In addition, in the embodiments of the present application, words such as "optionally" or "exemplarily" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "optionally" or "exemplarily" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "optionally" or "exemplarily" is intended to present related concepts in a specific way.

[0098] Figure 1 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a first communication node, such as Figure 1 As shown, the method may include the following steps:

[0099] S101. A first communication node determines a plurality of access points within a coverage area.

[0100] Exemplarily, the first communication node in the embodiment of the present application can be a device with a processor in a wireless communication system (e.g., a cell-free system). Since the first communication node has a certain coverage area, the first communication node can determine multiple access points within its coverage area.

[0101] S102. The first communication node controls multiple access points to send multiple synchronization signals and multiple MIBs.

[0102] Through step S101, after the first communication node determines a plurality of access points within its coverage area, the processor (Central Processing Unit, CPU) of the first communication node may control the plurality of access points to send a plurality of synchronization signals and a plurality of MIBs.

[0103] The multiple synchronization signals sent constitute one or more synchronization signal groups, each synchronization signal corresponds to a synchronization signal index, and one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index.

[0104] The embodiment of the present application provides a signal transmission method, which includes a first communication node determining multiple access points within a coverage area, and controlling the multiple access points to send multiple synchronization signals and multiple MIBs, wherein the multiple synchronization signals constitute one or more synchronization signal groups. In this way, the first communication node controls the sending of one or more synchronization signal groups, so that the receiving end can use the strength of the synchronization signal in the synchronization signal group as a reference for accessing the wireless system, making the access selection more scientific, so as to avoid problems such as cell interference and frequent cell selection as much as possible.

[0105] In an example, when two synchronization signals among the multiple synchronization signals have different synchronization signal group indexes, the two synchronization signals correspond to different scrambling codes for scrambling the associated MIB. At this time, the information carried by the MIB is generally different.

[0106] In another example, when the synchronization signal group indexes corresponding to at least two synchronization signals among multiple synchronization signals are the same, the scrambling codes of the MIBs for scrambling associations respectively corresponding to the at least two synchronization signal group indexes are the same. Further, when the sending time of at least two synchronization signals is the same, the information carried by the MIBs respectively associated with the synchronization signal group indexes corresponding to the at least two synchronization signals is the same.

[0107] Exemplarily, when the synchronization signal index s is determined, the synchronization signal group index g may be obtained in any one of the following two ways:

[0108]

[0109] Or, g = s% L (2)

[0110] Wherein, L in formula (1) and formula (2) is a preset positive integer greater than 1.

[0111] In one example, when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, it is assumed that the at least two synchronization signals satisfy the first QCL relationship.

[0112] Among them, the first QCL relationship is that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of at least two synchronization signal transmission channels is the same.

[0113] In an example, the synchronization signal may be composed of two synchronization signals, for example, a first synchronization signal and a second synchronization signal. Assuming that the number of first synchronization signals is M, the number of second synchronization signals is N, and both M and N are positive integers greater than 1, the multiple synchronization signals may be composed of M first synchronization signals and N second synchronization signals. Assuming that the synchronization signal is composed of a first synchronization signal with an index of i and a second synchronization signal with an index of j, the index s of the synchronization signal may be:

[0114] s=iN+j (3)

[0115] Or, s = i + jN (4)

[0116] That is, the number of available synchronization signals is at most M*N. Optionally, the value of L can be a multiple of M or N.

[0117] Figure 2 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a second communication node, such as Figure 2 As shown, the method includes:

[0118] S201. The second communication node receives multiple synchronization signals and multiple MIBs.

[0119] Exemplarily, the second communication node may be a user device in a wireless communication system (e.g., a cell-free system), and the multiple synchronization signals received by the second communication node may constitute one or more synchronization signal groups, that is, the second communication node may receive one or more synchronization signal groups.

[0120] Optionally, each synchronization signal among the multiple synchronization signals received by the second communication node may correspond to a synchronization signal index, and one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index.

[0121] S202. The second communication node detects multiple synchronization signals and multiple MIBs.

[0122] S203. The second communication node determines the accessed synchronization signal group according to the detection result, and obtains the MIB associated with the accessed synchronization signal group index.

[0123] When the second communication node accesses the wireless communication system, it can first detect the received synchronization signal, and when the synchronization signal group indexes corresponding to at least two synchronization signals among the above multiple synchronization signals are the same, the second communication node assumes that the above at least two synchronization signals satisfy the first quasi-co-site QCL relationship. For example, the first QCL relationship can be that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of at least two synchronization signal transmission channels is the same.

[0124] Based on the above default situation, the second communication node selects the best synchronization signal group as the synchronization signal group to be finally accessed according to the detection result, and obtains the MIB associated with the synchronization signal group index. After obtaining the MIB, the second communication node can obtain the resources of the wireless system according to the indication of the MIB and initiate random access.

[0125] Exemplarily, the basis for the second communication node to determine the best synchronization signal group index may be that the reference signal receiving power (RSRP) or reference signal received quality (RSRQ) after merging the synchronization signals in the synchronization signal group is the strongest.

[0126] The embodiment of the present application provides a signal transmission method, wherein the second communication node receives multiple synchronization signals and multiple MIBs, wherein the multiple synchronization signals constitute one or more synchronization signal groups, the second communication node detects the multiple synchronization signals and multiple MIBs, and the second communication node determines the accessed synchronization signal group according to the detection result, and obtains the MIB associated with the accessed synchronization signal group index. In this way, the second communication node can be based on the relevant parameters of the multiple synchronization signals of the synchronization signal group as a reference for accessing the wireless system. Compared with the traditional cellular system, each synchronization signal corresponds to a physical cell, each cell has its own MIB, and the second communication node can only select the cell corresponding to the strongest synchronization signal when performing initial access. In the scheme provided by the embodiment of the present application, the selection method of the second communication node is more scientific. Furthermore, in the traditional cellular system, the MIB of each cell is also independent. Even if the information contained in each MIB is the same, the second communication node cannot merge them. Except for the MIB of the target cell, other MIBs exist as interference. In the scheme provided by the embodiment of the present application, the second communication node can merge and receive the MIB in a synchronization signal group, thereby further improving the reception performance of the MIB.

[0127] In one example, when the synchronization signal group indexes corresponding to the at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling associations respectively corresponding to the at least two synchronization signal group indexes are the same. Further, when the sending time of the at least two synchronization signals is the same, the information carried by the MIBs respectively associated with the synchronization signal group indexes corresponding to the at least two synchronization signals is also the same.

[0128] Figure 3 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a first communication node, such as Figure 3 As shown, the method includes:

[0129] S301. The first communication node sends system information.

[0130] In an embodiment of the present application, the first communication node may be a device having a processor in a wireless communication system (e.g., a cell-free system), and the system information sent by the first communication node may include configuration information of at least one PRACH. For example, the configuration information may include a preamble format of the PRACH, a time-frequency position of the PRACH, a set of PRACH-associated synchronization signals, etc.

[0131] In an embodiment of the present application, one PRACH may be associated with one or more synchronization signal groups, and the synchronization signal group may include multiple synchronization signals.

[0132] Exemplarily, if multiple sets of PRACH resource configuration information are configured in the system information, then for different PRACH resources, the synchronization signal group set associated with each set of PRACH may be different. For example, assuming that two sets of PRACH resources are configured in the system information, the first set of PRACH resources may be associated with synchronization signal group 1, and the second set of PRACH resources may be associated with synchronization signal group 1 and synchronization signal group 2.

[0133] S302. The first communication node receives a random access preamble sent by the second communication node according to system information.

[0134] The random access preamble in this step may be sent by the second communication node on the PRACH resources preconfigured by the first communication node.

[0135] S303. The first communication node sends a response message to the random access preamble in a preset time window.

[0136] After the first communication node detects the random access preamble sent by the second communication node on the pre-configured PRACH resource, it can send a response message to the preamble in a preset time window.

[0137] The embodiment of the present application provides a signal transmission method, wherein a first communication node sends system information, the system information includes configuration information of at least one PRACH, one PRACH is associated with one or more synchronization signal groups, and the synchronization signal group includes multiple synchronization signals; the first communication node receives a random access preamble sent by a second communication node according to the system information, and sends a response message to the random access preamble in a preset time window. Since one PRACH is associated with one or more synchronization signal groups, compared with the traditional one PRACH being associated with only one synchronization signal or cell, the first communication node can refer to multiple synchronization signals associated with the PRACH when sending a response message based on the random access preamble sent by the second communication node to achieve better performance.

[0138] In one example, the PDCCH indicating the above response message and the demodulation reference signal corresponding to the PDCCH and the synchronization signal in the synchronization signal group associated with the PRACH satisfy the second quasi-co-site QCL relationship. The second QCL relationship may be that the transmission channel for transmitting the PDCCH and the demodulation reference signal and the synchronization signal transmission channel have at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters associated.

[0139] Exemplarily, the above association relationship may include the following possible situations:

[0140] The first case: one or more of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the wireless channel experienced by the transmitted PDCCH and its corresponding demodulation reference signal is equal to the sum of the above parameters of the channel experienced by the aforementioned synchronization signal.

[0141] The second case: one or more of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the wireless channel experienced by the transmitted PDCCH and its corresponding reference signal is equal to the weighted combination of the above parameters of the channel experienced by the aforementioned synchronization signal.

[0142] Figure 4 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a second communication node, such as Figure 4 As shown, the method includes:

[0143] S401. The second communication node receives system information.

[0144] The second communication node may be a user device in a wireless communication system (e.g., a cell-free system), and the system information it receives may include configuration information of at least one PRACH, wherein one PRACH is associated with one or more synchronization signal groups, and the synchronization signal group may include multiple synchronization signals.

[0145] S402. The second communication node determines a target PRACH in at least one PRACH according to a signal parameter of a synchronization signal in a synchronization signal group.

[0146] After receiving the system information, the second communication node can obtain the configuration information of PRACH based on the system information. If multiple sets of PRACH resources are configured in the system information, and the synchronization signal sets associated with each set of PRACH resources are different, then the second communication node can select one of the PRACH resources as the target PRACH based on the received synchronization signal detection situation, business service quality (Quality of Service, QoS) requirements, etc.

[0147] Of course, when only one set of PRACH resources is configured in the system information, the PRACH resource is the target PRACH.

[0148] S403. The second communication node sends a random access preamble on the target PRACH.

[0149] Exemplarily, the second communication node may send a preset random access preamble on the target PRACH.

[0150] The embodiment of the present application provides a signal transmission method, wherein the second communication node receives system information, the system information includes configuration information of at least one PRACH, and one PRACH is associated with one or more synchronization signal groups; the second communication node determines the target PRACH in at least one PRACH according to the signal parameters of the synchronization signal in the synchronization signal group, and sends a random access preamble on the target PRACH. Compared with the prior art, in the embodiment of the present application, the second communication node can comprehensively select appropriate PRACH resources according to the actual situation of the service, so as to better meet the user-centric needs in the decellular network.

[0151] In an example, the manner in which the second communication node determines the target PRACH in step S402 may include:

[0152] The second communication node selects a PRACH resource based on the quality of the received synchronization signal (such as RSRP, RSRQ, etc.). The worse the quality of the synchronization signal, the more synchronization signals or synchronization signal groups associated with the PRACH resources selected by the second communication node. For example, assuming that two sets of PRACH resources are configured in the system information, the first set of PRACH resources are associated with synchronization signal group 1, and the second set of PRACH resources are associated with synchronization signal group 1 and synchronization signal group 2, when the quality of the received synchronization signal is greater than the preset threshold, the second communication node can select the first set of PRACH resources, otherwise, the second communication node selects the second set of PRACH resources.

[0153] Alternatively, the second communication node selects the PRACH resource according to the QoS requirement of the service. For example, the higher the rate required by the service of the second communication node, the more synchronization signals or synchronization signal groups associated with the PRACH resource selected by the second communication node.

[0154] In one example, in the above step S403, when the second communication node sends a preset random access preamble on the selected target PRACH resource, its initial transmission power can be determined according to the received power of multiple synchronization signals associated with the selected PRACH resource. Exemplarily, the initial transmission power can be determined in the following possible ways:

[0155] Method 1: The system information indicates the transmission power of multiple synchronization signals associated with the PRACH resources. The second communication node can estimate the path loss of each synchronization signal from the transmitter to itself based on the power of the received synchronization signal, and then determine the initial transmission power of the random access preamble based on the maximum or minimum path loss.

[0156] Method 2: The system information indicates the transmission power of multiple synchronization signals associated with the PRACH resources. The second communication node can estimate the path loss of each synchronization signal from the transmitter to itself based on the power of the received synchronization signal, and determine the initial transmission power of the random access preamble based on the average value of the multiple path losses.

[0157] Method 3: The system information indicates the transmission power of multiple synchronization signals associated with the PRACH resources. The second communication node can estimate the path loss of each synchronization signal from the transmitter to itself based on the power of the received synchronization signal, and count the path loss of the synchronization signal whose received power is greater than a certain threshold. The second communication node determines the initial transmission power of the random access preamble based on the average value of these statistical path losses.

[0158] In an example, after the above step S403, the second communication node may also receive a response message sent by the first communication node to the random access preamble in a preset time window.

[0159] Optionally, the second communication node may indicate by default that the PDCCH of the above-mentioned response message and the demodulation reference signal corresponding to the PDCCH and the synchronization signal in the synchronization signal group associated with the PRACH satisfy the second quasi co-site QCL relationship.

[0160] Among them, the second QCL relationship can be that the transmission channel for transmitting PDCCH and demodulation reference signal is associated with at least one of Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the synchronization signal transmission channel.

[0161] After determining that the PDCCH of the above response information and the corresponding demodulation reference signal and the synchronization signal associated with the PRACH resource satisfy the second QCL relationship, the second communication node can use this relationship and the received demodulation reference signal to perform channel estimation, and then detect the PDCCH and its indication information.

[0162] Figure 5 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a first communication node, such as Figure 5 As shown, the method includes:

[0163] S501. After receiving a random access preamble sent by a second communication node on a preconfigured PRACH, the first communication node sends a first random access response message in a preset time window.

[0164] Optionally, the first communication node may be a device having a processor in a wireless communication system (for example, a cell-free system), and the first random access response message sent by the first communication node may carry one of the following information:

[0165] The aforementioned detected random access preamble index information;

[0166] Time-frequency position information of the second random access response information;

[0167] Indicates the time-frequency position of the PDCCH of the second random access response information, search space information, etc.

[0168] S502. The first communication node sends a second random access response message according to the first random access response message.

[0169] The first random access response message carries the third quasi-co-site QCL relationship of the second random access response message.

[0170] Exemplarily, the third QCL relationship of the second random access response message may include: a third QCL relationship between the second random access response message and a demodulation reference signal corresponding to the second random access response message, and / or a third QCL relationship between a PDCCH corresponding to the second random access response message and a demodulation reference signal corresponding to the PDCCH.

[0171] Optionally, the second random access response information carries at least timing advance information, and further, may also carry uplink authorization information.

[0172] In an embodiment of the present application, after receiving the random access preamble sent by the second communication node on the preconfigured PRACH, the first communication node sends a first random access response message in a preset time window, and sends a second random access response message according to the first random access response message; wherein the first random access response message carries the third quasi-co-site QCL relationship of the second random access response message. In this way, the first communication node is not limited to the restriction that only the second communication node can select a cell to send a random access response, thereby greatly improving the performance of the second communication node randomly accessing the wireless network, and at the same time, it also has the advantages of simple implementation and low signaling overhead.

[0173] In one example, the above-mentioned third QCL relationship can be that the transmission channel of the second random access response message and the demodulation reference signal corresponding to the second random access response message are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node, and / or, the transmission channel of the PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node.

[0174] Optionally, the PDCCH may indicate information such as a time offset position and a coding modulation format of a physical downlink shared channel (PDSCH) corresponding to the second random access response information.

[0175] In one example, the third QCL relationship of the second random access response message can be indicated by displaying signaling, or it can be indicated whether the third QCL relationship of the second random access response message needs to be updated. For example, it is assumed that the transmission channel of the second random access response message and its corresponding demodulation reference signal and the transmission channel of the synchronization signal initially selected by the second communication node satisfy the above-mentioned third QCL relationship, and / or, the transmission channel of the demodulation reference signal corresponding to the PDCCH for transmitting the second random access response message and the transmission channel of the demodulation reference signal corresponding to the PDCCH and the transmission channel of the synchronization signal initially selected by the second communication node satisfy the above-mentioned third QCL relationship. If it is indicated that the third QCL relationship of the second random access response message needs to be updated, one or more of the synchronization signal and the third QCL related information can be updated according to the indication.

[0176] Figure 6 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a second communication node, such as Figure 6 As shown, the method includes:

[0177] S601. The second communication node sends a random access preamble on a preconfigured PRACH.

[0178] The second communication node may be a user equipment in a wireless communication system (eg, a cell-free system), and the second communication node may send a preset random access preamble on a PRACH resource selected by the second communication node.

[0179] S602: The second communication node receives a first random access response message sent by the first communication node in response to the random access preamble in a preset time window.

[0180] The second communication node may detect the first random access response message in a preset time window, and the detected first random access response message carries the third QCL relationship of the second random access response message.

[0181] Optionally, the third QCL relationship of the second random access response message may be indicated by display signaling, or whether the third QCL relationship of the second random access response message needs to be updated may be indicated.

[0182] S603. The second communication node receives a second random access response message according to the first random access response message.

[0183] Exemplarily, in the case where the third QCL relationship indicating the second random access response message needs to be updated, the second communication node may update one or more of the synchronization signal and the third QCL related information according to the indication.

[0184] In an embodiment of the present application, since the first random access response message received by the second communication node carries the third QCL relationship of the second random access response message, this can facilitate improving the performance of the second communication node's random access to the wireless network, while having the advantages of simple implementation and low signaling overhead.

[0185] In one example, the third QCL relationship of the second random access response message may include: a third QCL relationship between the second random access response message and a demodulation reference signal corresponding to the second random access response message, and / or a third QCL relationship between a PDCCH corresponding to the second random access response message and a demodulation reference signal corresponding to the PDCCH.

[0186] In one example, the third QCL relationship may be that the transmission channel of the second random access response message and the demodulation reference signal corresponding to the second random access response message are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node, and / or, the transmission channel of the PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node.

[0187] Figure 7 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a first communication node, such as Figure 7 As shown, the method includes:

[0188] S701. A first communication node determines a working status of a second communication node.

[0189] The first communication node may be a device having a processor in a wireless communication system (e.g., a cell-free system), the second communication node may be a user device in the wireless communication system (e.g., a cell-free system), and the working state of the second communication node may be a connected state, an idle state, etc.

[0190] S702: When the working state is a connected state, the first communication node configures service node topology information for the second communication node.

[0191] When the first communication node determines that the second communication node is operating in a connected state, that is, there is service transmission, the first communication node configures service node topology information for the second communication node.

[0192] Exemplarily, the topology information may include the geographical location of each service node in the wireless communication system, the relationship between each service node in terms of position, etc.

[0193] For example, multiple synchronization signal indexes / cell indexes and the relative relationship of these synchronization signal indexes / cell indexes in geographical locations may be provided in the configured topology information. For example, the direction and distance of cell index B relative to cell index A may be indicated. Alternatively, the absolute location information of each service node may be provided in the configured topology information.

[0194] The embodiment of the present application provides a signal transmission method, in which the first communication node configures service node topology information for the second communication node when the first communication node determines that the working state of the second communication node is a connected state. Since a higher rate can be provided in the decellularized system, the service data of the second communication node can be transmitted quickly, so configuring the service node topology information for the second communication node in the connected state can enable the second communication node to perform detection according to the topology information in the idle state or the deactivated state, thereby reducing the power consumption of the second communication node.

[0195] Figure 8 A flowchart of a signal transmission method provided in an embodiment of the present application, the method can be applied to a second communication node, such as Figure 8 As shown, the method includes:

[0196] S801. The second communication node obtains service node topology information configured by the first communication node.

[0197] The above-mentioned second communication node can be a user equipment in a wireless communication system (for example, a cell-free system), and the configured service node topology information can include the geographical location of each service node in the wireless communication system, the azimuthal relationship between each service node, etc.

[0198] S802: When the second communication node determines that it is operating in a non-connected state, the second communication node determines a relative position of the second communication node in the service node network according to the service node topology information and the current position of the second communication node.

[0199] Exemplarily, when the second communication node completes transmitting business data, that is, is in a non-connected state, the second communication node can determine its relative position with respect to each service node in the network based on the service node topology information and its current position in the network.

[0200] S803. The second communication node determines a detection method for the synchronization signal according to the relative position.

[0201] After the second communication node obtains its own phase position, it can estimate the possibility of moving out of the network according to its own speed, and then determine the subsequent detection method for the synchronization signal.

[0202] For example, if the possibility of the second communication node moving out of the network is low, the application to stop detecting the synchronization signal can be reduced; on the contrary, if the possibility of moving out of the network is high, the received synchronization signal can be detected and random access can be initiated to request an update of the service node topology information.

[0203] In one example, if the second communication node detects that the reception quality (RSRP or RSRQ) of a synchronization signal is greater than the synchronization signal reception quality configured in the service node topology information, then the second communication node can initiate random access when the number of synchronization signals that meet the above reception quality judgment condition (i.e., the reception quality of the synchronization signal is greater than the synchronization signal reception quality configured in the service node topology information) is greater than a certain number. This can further reduce the power consumption of the second communication node.

[0204] It should be noted that in a decellularized network, due to dense deployment of sites, there are usually multiple sites serving a second communication node at the same time, so a single access point will not have much impact on the performance of the second communication node.

[0205] The embodiment of the present application provides a signal transmission method, in which the second communication node obtains the service node topology information configured by the first communication node, and when the second communication node determines that it is working in a non-connected state, the second communication node determines the relative position of the second communication node in the service node network according to the service node topology information and the current positioning of the second communication node, and determines the detection method of the synchronization signal according to the relative position. In this way, the detection method of the synchronization signal is determined according to its actual situation, which can effectively reduce the power consumption of the second communication node.

[0206] Fig. 9 A signal transmission device provided in an embodiment of the present application, such as Fig. 9 As shown, the device may include a determination module 901 and a control module 902;

[0207] Wherein, the determination module is used to determine multiple access points within the coverage area;

[0208] A control module, used for controlling multiple access points to send multiple synchronization signals and multiple MIBs;

[0209] The multiple synchronization signals constitute one or more synchronization signal groups, each synchronization signal corresponds to a synchronization signal index, and a synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index.

[0210] In one example, when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling associations corresponding to the at least two synchronization signal group indexes are the same. Further, when the sending time of at least two synchronization signals is the same, the information carried by the MIBs associated with the synchronization signal group indexes corresponding to the at least two synchronization signals is the same.

[0211] In one example, when the synchronization signal group index corresponding to at least two synchronization signals is the same, it is assumed that at least two synchronization signals satisfy the first quasi-co-site QCL relationship; wherein the first QCL relationship is that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of at least two synchronization signal transmission channels is the same.

[0212] The signal transmission device provided in this embodiment is used to implement Figure 1 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0213] Fig.10 A signal transmission device provided in an embodiment of the present application, such as Fig.10 As shown, the device may include a receiving module 1001, a detecting module 1002, a determining module 1003, and an acquiring module 1004;

[0214] Wherein, the receiving module is used to receive multiple synchronization signals and multiple MIBs;

[0215] wherein the plurality of synchronization signals constitute one or more synchronization signal groups;

[0216] A detection module, used for detecting multiple synchronization signals and multiple MIBs;

[0217] A determination module, used to determine the accessed synchronization signal group according to the detection result;

[0218] The acquisition module is used to acquire the MIB associated with the accessed synchronization signal group index.

[0219] Each synchronization signal among the multiple synchronization signals corresponds to a synchronization signal index, and one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index.

[0220] In one example, when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling associations corresponding to the at least two synchronization signal group indexes are the same. Further, when the sending time of at least two synchronization signals is the same, the information carried by the MIBs associated with the synchronization signal group indexes corresponding to the at least two synchronization signals is the same.

[0221] In one example, when the synchronization signal group index corresponding to at least two synchronization signals is the same, it is assumed that at least two synchronization signals satisfy the first quasi-co-site QCL relationship; wherein the first QCL relationship is that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of at least two synchronization signal transmission channels is the same.

[0222] The signal transmission device provided in this embodiment is used to implement Figure 2 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0223] Fig.11 A signal transmission device provided in an embodiment of the present application, such as Fig.11 As shown, the device may include a sending module 1101 and a receiving module 1102;

[0224] The sending module is used to send system information, where the system information includes configuration information of at least one PRACH, where one PRACH is associated with one or more synchronization signal groups, and the synchronization signal group includes multiple synchronization signals;

[0225] A receiving module, configured to receive a random access preamble sent by a second communication node according to system information;

[0226] The sending module is also used to send a response message in a preset time window for the random access preamble.

[0227] In an example, the PDCCH indicating the above-mentioned response message and the demodulation reference signal corresponding to the PDCCH and the synchronization signal in the synchronization signal group associated with the PRACH satisfy the second quasi co-site QCL relationship.

[0228] The second QCL relationship is that there is an association between at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel for transmitting the PDCCH and the demodulation reference signal and the synchronization signal transmission channel.

[0229] The signal transmission device provided in this embodiment is used to implement Figure 3 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0230] Fig.12 A signal transmission device provided in an embodiment of the present application, such as Fig.12 As shown, the device may include a receiving module 1201, a determining module 1202, and a sending module 1203;

[0231] The receiving module is used to receive system information, where the system information includes configuration information of at least one PRACH, and one PRACH is associated with one or more synchronization signal groups;

[0232] A determination module, configured to determine a target PRACH in at least one PRACH according to a signal parameter of a synchronization signal in a synchronization signal group;

[0233] The sending module is used to send a random access preamble on a target PRACH.

[0234] In one example, the above device may further include a receiving module;

[0235] A receiving module, configured to receive a response message sent by the first communication node to the random access preamble in a preset time window;

[0236] Among them, the PDCCH indicating the response message and the demodulation reference signal corresponding to the PDCCH and the synchronization signal in the synchronization signal group associated with the PRACH satisfy the second QCL relationship, and the second QCL relationship is that the transmission channel for transmitting the PDCCH and the demodulation reference signal and at least one of the Doppler offset, Doppler spread, average delay, delay spread, and spatial reception parameters of the synchronization signal transmission channel are associated.

[0237] The signal transmission device provided in this embodiment is used to implement Figure 4 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0238] Fig.13 A signal transmission device provided in an embodiment of the present application, such as Fig.13 As shown, the device may include a receiving module 1301 and a sending module 1302;

[0239] The receiving module is configured to send a first random access response message in a preset time window after receiving a random access preamble sent by the second communication node on a preconfigured PRACH;

[0240] A sending module, configured to send a second random access response message according to the first random access response message;

[0241] The first random access response message carries the third QCL relationship of the second random access response message.

[0242] In one example, the third QCL relationship of the second random access response message includes: a third QCL relationship between the second random access response message and a demodulation reference signal corresponding to the second random access response message, and / or a third QCL relationship between a PDCCH corresponding to the second random access response message and a demodulation reference signal corresponding to the PDCCH.

[0243] In one example, the third QCL relationship is that the transmission channel of the second random access response message and the demodulation reference signal corresponding to the second random access response message are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node, and / or, the transmission channel of the PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node.

[0244] The signal transmission device provided in this embodiment is used to implement Figure 5 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0245] Fig.14 A signal transmission device provided in an embodiment of the present application, such as Fig.14 As shown, the device may include a sending module 1401 and a receiving module 1402;

[0246] Wherein, the sending module is used to send a random access preamble on a preconfigured PRACH;

[0247] A receiving module, configured to receive a first random access response message sent by a first communication node in response to a random access preamble in a preset time window;

[0248] The first random access response message carries the third QCL relationship of the second random access response message;

[0249] The receiving module is further configured to receive a second random access response message according to the first random access response message.

[0250] In one example, the third QCL relationship of the second random access response message includes: a third QCL relationship between the second random access response message and a demodulation reference signal corresponding to the second random access response message, and / or a third QCL relationship between a PDCCH corresponding to the second random access response message and a demodulation reference signal corresponding to the PDCCH.

[0251] In one example, the third QCL relationship is that the transmission channel of the second random access response message and the demodulation reference signal corresponding to the second random access response message are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node, and / or, the transmission channel of the PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node.

[0252] The signal transmission device provided in this embodiment is used to implement Figure 6 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0253] Fig.15 A signal transmission device provided in an embodiment of the present application, such as Fig.15 As shown, the apparatus may include a determination module 1501 and a configuration module 1502;

[0254] Wherein, the determination module is used to determine the working state of the second communication node;

[0255] The configuration module is used to configure the service node topology information for the second communication node when the working state is a connected state.

[0256] The service node topology information includes: the geographical location of each service node and the relationship between each service node in terms of location.

[0257] The signal transmission device provided in this embodiment is used to implement Figure 7 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0258] Fig.16 A signal transmission device provided in an embodiment of the present application, such as Fig.16 As shown, the device may include an acquisition module 1601 and a determination module 1602;

[0259] Wherein, the acquisition module is used to obtain the service node topology information configured by the first communication node;

[0260] A determination module, used to determine the relative position of the device in the service node network according to the service node topology information and the current location of the device when the device is working in a non-connected state;

[0261] The determination module is also used to determine the detection method of the synchronization signal according to the relative position.

[0262] The service node topology information includes: the geographical location of each service node and the relationship between each service node in terms of location.

[0263] The signal transmission device provided in this embodiment is used to implement Figure 8 The signal transmission method of the illustrated embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0264] Fig.17 A schematic diagram of the structure of a communication node provided by an embodiment is shown in FIG. Fig.17 As shown, the communication node includes a processor 1701 and a memory 1702; the number of processors 1701 in the communication node may be one or more. Fig.17 A processor 1701 is taken as an example; the processor 1701 and the memory 1702 in the communication node can be connected by a bus or other means. Fig.17 The example of connecting through bus is taken in the following.

[0265] The memory 1702 is a computer-readable storage medium that can be used to store software programs, computer executable programs, and modules, such as the present application. Figure 1 , 3 , 5, and 7. The processor 1701 implements the above-mentioned signal transmission method by running the software program, instructions, and modules stored in the memory 1702.

[0266] The memory 1702 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the set-top box, etc. In addition, the memory 1702 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0267] Fig.18 A schematic diagram of the structure of a communication node provided by an embodiment is shown in FIG. Fig.18 As shown, the communication node includes a processor 1801 and a memory 1802; the number of processors 1801 in the communication node can be one or more. Fig.18 A processor 1801 is taken as an example; the processor 1801 and the memory 1802 in the communication node can be connected by a bus or other means. Fig.18 The example of connecting through bus is taken in the following.

[0268] The memory 1802 is a computer-readable storage medium that can be used to store software programs, computer executable programs, and modules, such as the present application. Figure 2 , 4, 6, and 8. The processor 1801 implements the above-mentioned signal transmission method by running the software program, instructions, and modules stored in the memory 1802.

[0269] The memory 1802 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the set-top box, etc. In addition, the memory 1802 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0270] The present application also provides a readable and writable storage medium for computer storage, wherein the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to execute Figure 1 , 3 , 5, and 7. A signal transmission method in embodiments.

[0271] The present application also provides a readable and writable storage medium for computer storage, wherein the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to execute Figure 2 , 4 , 6, and 8 are signal transmission methods in embodiments.

[0272] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above and the functional modules / units in the communication nodes may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0273] In hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0274] The above only illustrates the exemplary embodiments of the present application with reference to the accompanying drawings, and does not limit the scope of the present invention. Any modification, equivalent substitution and improvement made by those skilled in the art without departing from the scope and essence of the present invention shall be within the scope of the present invention.

Claims

1. A signal transmission method, characterized in that: The method comprises the following steps: The first communication node determines a plurality of access points within the coverage area; The first communication node controls the multiple access points to send multiple synchronization signals and multiple master system information blocks MIBs; Among them, the multiple synchronization signals constitute one or more synchronization signal groups, each synchronization signal corresponds to a synchronization signal index, a synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs used for scrambling association corresponding to the at least two synchronization signal group indexes are the same.

2. The method according to claim 1, characterized in that In the case where the sending times of at least two synchronization signals are the same, the information carried by the MIBs respectively associated with the synchronization signal group indexes corresponding to the at least two synchronization signals is the same.

3. The method according to claim 1 or 2, characterized in that: In the case where the synchronization signal group indexes corresponding to at least two synchronization signals are the same, it is assumed that the at least two synchronization signals satisfy the first quasi co-site QCL relationship; Among them, the first QCL relationship is that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the at least two synchronization signal transmission channels is the same.

4. A signal transmission method, characterized in that: The method comprises the following steps: The second communication node receives a plurality of synchronization signals and a plurality of master system information blocks MIB; The multiple synchronization signals constitute one or more synchronization signal groups, each synchronization signal corresponds to a synchronization signal index, a synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; The second communication node detects the multiple synchronization signals and the multiple MIBs; The second communication node determines the accessed synchronization signal group according to the detection result, and obtains the MIB associated with the accessed synchronization signal group index.

5. The method according to claim 4, characterized in that In the case where the sending times of at least two synchronization signals are the same, the information carried by the MIBs respectively associated with the synchronization signal group indexes corresponding to the at least two synchronization signals is the same.

6. The method according to claim 4 or 5, characterized in that: In the case where the synchronization signal group indexes corresponding to at least two synchronization signals are the same, it is assumed that the at least two synchronization signals satisfy the first quasi co-site QCL relationship; Among them, the first QCL relationship is that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the at least two synchronization signal transmission channels is the same.

7. A signal transmission method, characterized in that: The method comprises the following steps: The first communication node sends system information, where the system information includes configuration information of at least one physical random access channel PRACH, one PRACH is associated with one or more synchronization signal groups, the synchronization signal group includes multiple synchronization signals, each synchronization signal corresponds to a synchronization signal index, one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; The first communication node receives a random access preamble sent by the second communication node according to the system information; The first communication node sends a response message to the random access preamble within a preset time window.

8. The method according to claim 7, characterized in that Indicates that a physical downlink control channel PDCCH of the response message and a demodulation reference signal corresponding to the PDCCH and a synchronization signal in a synchronization signal group associated with the PRACH satisfy a second quasi co-site QCL relationship; The second QCL relationship is that there is an association between the transmission channel for transmitting the PDCCH and the demodulation reference signal and at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the synchronization signal transmission channel.

9. A signal transmission method, characterized in that: The method comprises the following steps: The second communication node receives system information, where the system information includes configuration information of at least one physical random access channel PRACH, one PRACH is associated with one or more synchronization signal groups, the synchronization signal group includes multiple synchronization signals, each synchronization signal corresponds to a synchronization signal index, one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; The second communication node determines a target PRACH in at least one PRACH according to a signal parameter of a synchronization signal in the synchronization signal group; The second communications node sends a random access preamble on the target PRACH.

10. The method according to claim 9, characterized in that After the second communication node sends a random access preamble on the target PRACH, the method further includes: The second communication node receives a response message sent by the first communication node to the random access preamble in a preset time window; The physical downlink control channel PDCCH indicating the response message and the demodulation reference signal corresponding to the PDCCH satisfy a second quasi-co-site QCL relationship with the synchronization signal in the synchronization signal group associated with the PRACH; The second QCL relationship is that there is an association between the transmission channel for transmitting the PDCCH and the demodulation reference signal and at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the synchronization signal transmission channel.

11. A signal transmission method, characterized in that: The method comprises the following steps: After receiving the random access preamble sent by the second communication node on the preconfigured physical random access channel PRACH, the first communication node sends a first random access response message in a preset time window; The first communication node sends a second random access response message according to the first random access response message; Among them, the first random access response message carries the third quasi-co-site QCL relationship of the second random access response message, and the random access preamble is sent by the second communication node based on system information from the first communication node, and the system information includes configuration information of at least one physical random access channel PRACH, and one PRACH is associated with one or more synchronization signal groups. The synchronization signal group includes multiple synchronization signals, each synchronization signal corresponds to a synchronization signal index, and a synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index. When the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs used for scrambling association corresponding to the at least two synchronization signal group indexes are the same.

12. The method according to claim 11, characterized in that The third QCL relationship of the second random access response message includes: The third QCL relationship between the second random access response message and the demodulation reference signal corresponding to the second random access response message, and / or the third QCL relationship between the physical downlink control channel PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH.

13. The method according to claim 11 or 12, characterized in that: The third QCL relationship is that the transmission channel of the second random access response message and the demodulation reference signal corresponding to the second random access response message are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node, and / or the transmission channel of the physical downlink control channel PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node.

14. A signal transmission method, characterized in that: The method comprises the following steps: The second communication node sends a random access preamble on a preconfigured physical random access channel PRACH, where the random access preamble is sent by the second communication node based on system information from the first communication node, where the system information includes configuration information of at least one physical random access channel PRACH, one PRACH is associated with one or more synchronization signal groups, the synchronization signal group includes multiple synchronization signals, each synchronization signal corresponds to a synchronization signal index, one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; The second communication node receives, in a preset time window, a first random access response message sent by the first communication node to the random access preamble, wherein the first random access response message carries a third quasi-co-site QCL relationship of the second random access response message; The second communication node receives the second random access response message according to the first random access response message.

15. The method according to claim 14, characterized in that The third QCL relationship of the second random access response message includes: The third QCL relationship between the second random access response message and the demodulation reference signal corresponding to the second random access response message, and / or the third QCL relationship between the physical downlink control channel PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH.

16. The method according to claim 14 or 15, characterized in that The third QCL relationship is that the transmission channel of the second random access response message and the demodulation reference signal corresponding to the second random access response message are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node, and / or the transmission channel of the physical downlink control channel PDCCH corresponding to the second random access response message and the demodulation reference signal corresponding to the PDCCH are the same as at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters of the transmission channel of the synchronization signal initially selected by the second communication node.

17. A signal transmission method, characterized in that: The method comprises the following steps: The first communication node determines the working state of the second communication node; When the working state is a connected state, the first communication node configures service node topology information for the second communication node; Among them, the service node topology information includes multiple synchronization signal indexes, one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index. When the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs used for scrambling association corresponding to the at least two synchronization signal group indexes are the same.

18. The method according to claim 17, characterized in that The service node topology information includes: the geographical location of each service node and the relationship between each service node in terms of location.

19. A signal transmission method, characterized in that: The method comprises the following steps: The second communication node obtains the service node topology information configured by the first communication node, where the service node topology information includes multiple synchronization signal indexes, one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; When the second communication node determines that it is working in a non-connected state, the second communication node determines a relative position of the second communication node in the service node network according to the service node topology information and the current location of the second communication node; The second communication node determines a detection method for the synchronization signal according to the relative position.

20. The method according to claim 19, characterized in that The service node topology information includes: the geographical location of each service node and the relationship between each service node in terms of location.

21. A signal transmission device, characterized in that: The device comprises: A determination module, used to determine multiple access points within the coverage area; A control module, used for controlling the multiple access points to send multiple synchronization signals and multiple master system information blocks MIB; Among them, the multiple synchronization signals constitute one or more synchronization signal groups, each synchronization signal corresponds to a synchronization signal index, a synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs used for scrambling association corresponding to the at least two synchronization signal group indexes are the same.

22. A signal transmission device, characterized in that: include: A receiving module, used for receiving a plurality of synchronization signals and a plurality of master system information blocks MIB; The multiple synchronization signals constitute one or more synchronization signal groups, each synchronization signal corresponds to a synchronization signal index, a synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; A detection module, used to detect the multiple synchronization signals and the multiple MIBs; A determination module, used to determine the accessed synchronization signal group according to the detection result; The acquisition module is used to acquire the MIB associated with the accessed synchronization signal group index.

23. A signal transmission device, characterized in that: include: A sending module, configured to send system information, wherein the system information includes configuration information of at least one physical random access channel PRACH, wherein one PRACH is associated with one or more synchronization signal groups, wherein the synchronization signal group includes multiple synchronization signals, each synchronization signal corresponds to a synchronization signal index, and one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index. When the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; A receiving module, configured to receive a random access preamble sent by a second communication node according to the system information; The sending module is further configured to send a response message to the random access preamble in a preset time window.

24. A signal transmission device, characterized in that: include: A receiving module, configured to receive system information, the system information including configuration information of at least one physical random access channel PRACH, one PRACH being associated with one or more synchronization signal groups, the synchronization signal group including multiple synchronization signals, each synchronization signal corresponding to a synchronization signal index, one synchronization signal index corresponding to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; A determination module, configured to determine a target PRACH in at least one PRACH according to a signal parameter of a synchronization signal in the synchronization signal group; The sending module is used to send a random access preamble on the target PRACH.

25. A signal transmission device, characterized in that: include: A receiving module, configured to send a first random access response message in a preset time window after receiving a random access preamble sent by a second communication node on a preconfigured physical random access channel PRACH; A sending module, configured to send a second random access response message according to the first random access response message; Among them, the first random access response message carries the third quasi-co-site QCL relationship of the second random access response message, and the random access preamble is sent by the second communication node based on system information from the first communication node, and the system information includes configuration information of at least one physical random access channel PRACH, and one PRACH is associated with one or more synchronization signal groups, and the synchronization signal group includes multiple synchronization signals, each synchronization signal corresponds to a synchronization signal index, and a synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index. When the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs used for scrambling association corresponding to the at least two synchronization signal group indexes are the same.

26. A signal transmission device, characterized in that: include: A sending module, configured to send a random access preamble on a preconfigured physical random access channel PRACH, wherein the random access preamble is sent by the second communication node based on system information from the first communication node, wherein the system information includes configuration information of at least one physical random access channel PRACH, and one PRACH is associated with one or more synchronization signal groups, wherein the synchronization signal group includes multiple synchronization signals, each synchronization signal corresponds to a synchronization signal index, and one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; A receiving module, configured to receive a first random access response message sent by the first communication node to the random access preamble in a preset time window, wherein the first random access response message carries a third quasi-co-site QCL relationship of a second random access response message; The receiving module is further configured to receive the second random access response message according to the first random access response message.

27. A signal transmission device, characterized in that: include: A determination module, used to determine the working state of the second communication node; A configuration module, configured to configure service node topology information for the second communication node when the working state is a connected state; Among them, the service node topology information includes multiple synchronization signal indexes, one synchronization signal index corresponds to a synchronization signal group index and a MIB associated with the synchronization signal group index. When the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs used for scrambling association corresponding to the at least two synchronization signal group indexes are the same.

28. A signal transmission device, characterized in that: include: An acquisition module, configured to acquire service node topology information configured by the first communication node, the service node topology information comprising a plurality of synchronization signal indexes, one synchronization signal index corresponding to a synchronization signal group index and a MIB associated with the synchronization signal group index, and when the synchronization signal group indexes corresponding to at least two synchronization signals are the same, the scrambling codes of the MIBs for scrambling association respectively corresponding to the at least two synchronization signal group indexes are the same; a determination module, configured to determine, when the device is operating in a non-connected state, a relative position of the device in a service node network according to the service node topology information and a current location of the device; The determination module is further used to determine a detection method for the synchronization signal according to the relative position.

29. A communication node, characterized in that: include: A memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory, wherein the program, when executed by the processor, realizes the signal transmission method according to any one of claims 1 to 3, or the signal transmission method according to claim 7 or 8, or the signal transmission method according to any one of claims 11 to 13, or the signal transmission method according to claim 17 or 18.

30. A communication node, characterized in that: include: A memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory, wherein the program, when executed by the processor, realizes the signal transmission method according to any one of claims 4 to 6, or the signal transmission method according to claim 9 or 10, or the signal transmission method according to any one of claims 14 to 16, or the signal transmission method according to claim 19 or 20.

31. A readable and writable storage medium for computer storage, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the signal transmission method described in any one of claims 1 to 3, or the signal transmission method described in claim 7 or 8, or the signal transmission method described in any one of claims 11 to 13, or the signal transmission method described in claim 17 or 18.

32. A readable and writable storage medium for computer storage, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the signal transmission method described in any one of claims 4 to 6, or the signal transmission method described in claim 9 or 10, or the signal transmission method described in any one of claims 14 to 16, or the signal transmission method described in claim 19 or 20.

Images